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Author SHA1 Message Date
Sydney RunkleandGitHub 869b0f2de4 release(sdk-py): 0.2.0 (#5622) 2025-07-22 13:27:04 -04:00
Sydney Runkle 90e3adcd71 bump sdk version 2025-07-22 13:20:55 -04:00
Sydney RunkleandGitHub cb918601d1 release: prep for langgraph v0.6 (#5325) 2025-07-22 13:14:31 -04:00
Sydney Runkle 4a4c8db635 fix header 2025-07-22 12:54:21 -04:00
Sydney Runkle 56a9ce57b1 docs build fixes 2025-07-22 12:46:56 -04:00
Sydney Runkle d1ee1cf1f1 docs fix 2025-07-22 11:19:08 -04:00
Sydney RunkleandGitHub 29c3a579b3 release(sdk-py): use v0.2.0a1 for testing with sdk (#5621) 2025-07-22 15:08:07 +00:00
Sydney RunkleandGitHub 9e3cb1f034 feat(sdk-py): sdk support for context API (#5566)
Adding support for the `context` arg to `invoke/stream` to the sdk. This
is paired with an update to the API as well that adds `context` support
to the `assistants` and `runs` endpoints.

Bumping version to v0.2.0 on the `v1` branch given this and the
interrupt schema changes.
2025-07-22 10:48:12 -04:00
Sydney RunkleandGitHub 508e333220 Merge branch 'main' into v1 2025-07-22 08:55:42 -04:00
Sydney RunkleandGitHub 139cad373b fix(docs): use InMemorySaver instead of MemorySaver (#5608)
Also, remove comment from bash script that makes insertion of `uv`
harder
2025-07-21 18:49:55 +00:00
Sydney RunkleandGitHub 2a86abb8c4 chore: lint v1 branch (due to auto merges) (#5607) 2025-07-21 18:43:22 +00:00
Sydney RunkleandGitHub d1f0799002 Merge branch 'main' into v1 2025-07-21 14:35:13 -04:00
Sydney RunkleandGitHub be088801ba fix(langgraph): fix assertion in test (#5606) 2025-07-21 14:25:37 -04:00
Sydney RunkleandGitHub 1ee6bfeb8d release(langgraph): v0.5.4 (#5605) 2025-07-21 18:17:00 +00:00
Nuno CamposandGitHub 2153d36726 feat(langgraph): Handle ParentCommand in RemoteGraph (#5600)
- when receiving a "command" stream event raise ParentCommand exception
for caller graph to handle
2025-07-21 18:48:40 +01:00
Sydney RunkleandGitHub 819eae891e feat(sdk-py): add interrupts to ThreadState (#5603) 2025-07-21 16:33:00 +00:00
Sydney Runkle 457edaa75b locks 2025-07-21 12:32:23 -04:00
Sydney RunkleandGitHub 90ba4c5205 Merge branch 'main' into v1 2025-07-21 10:06:23 -04:00
Sydney RunkleandGitHub b3c5298100 fix(langgraph): ignore write to END with Command (#5601)
Fixes https://github.com/langchain-ai/langgraph/issues/5572

End is a special terminal node, so we don't need a branch to channel
like we do for other values passed to `Command.goto`
2025-07-21 14:03:00 +00:00
dependabot[bot]GitHubdependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
9d9476e664 chore: bump codespell-project/actions-codespell from 2.0 to 2.1 (#5597)
Bumps
[codespell-project/actions-codespell](https://github.com/codespell-project/actions-codespell)
from 2.0 to 2.1.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/codespell-project/actions-codespell/releases">codespell-project/actions-codespell's
releases</a>.</em></p>
<blockquote>
<h2>v2.1</h2>
<h2>What's Changed</h2>
<ul>
<li>Use v2 in README by <a
href="https://github.com/okuramasafumi"><code>@​okuramasafumi</code></a>
in <a
href="https://redirect.github.com/codespell-project/actions-codespell/pull/69">codespell-project/actions-codespell#69</a></li>
<li>Bump actions/checkout from 3 to 4 by <a
href="https://github.com/dependabot"><code>@​dependabot</code></a> in <a
href="https://redirect.github.com/codespell-project/actions-codespell/pull/72">codespell-project/actions-codespell#72</a></li>
<li>Bump actions/setup-python from 4 to 5 by <a
href="https://github.com/dependabot"><code>@​dependabot</code></a> in <a
href="https://redirect.github.com/codespell-project/actions-codespell/pull/74">codespell-project/actions-codespell#74</a></li>
<li>feat: bump to use node20 runtime by <a
href="https://github.com/kbdharun"><code>@​kbdharun</code></a> in <a
href="https://redirect.github.com/codespell-project/actions-codespell/pull/71">codespell-project/actions-codespell#71</a></li>
<li>[pre-commit.ci] pre-commit autoupdate by <a
href="https://github.com/pre-commit-ci"><code>@​pre-commit-ci</code></a>
in <a
href="https://redirect.github.com/codespell-project/actions-codespell/pull/76">codespell-project/actions-codespell#76</a></li>
</ul>
<h2>New Contributors</h2>
<ul>
<li><a
href="https://github.com/okuramasafumi"><code>@​okuramasafumi</code></a>
made their first contribution in <a
href="https://redirect.github.com/codespell-project/actions-codespell/pull/69">codespell-project/actions-codespell#69</a></li>
<li><a
href="https://github.com/dependabot"><code>@​dependabot</code></a> made
their first contribution in <a
href="https://redirect.github.com/codespell-project/actions-codespell/pull/72">codespell-project/actions-codespell#72</a></li>
<li><a href="https://github.com/kbdharun"><code>@​kbdharun</code></a>
made their first contribution in <a
href="https://redirect.github.com/codespell-project/actions-codespell/pull/71">codespell-project/actions-codespell#71</a></li>
<li><a
href="https://github.com/pre-commit-ci"><code>@​pre-commit-ci</code></a>
made their first contribution in <a
href="https://redirect.github.com/codespell-project/actions-codespell/pull/76">codespell-project/actions-codespell#76</a></li>
</ul>
<p><strong>Full Changelog</strong>: <a
href="https://github.com/codespell-project/actions-codespell/compare/v2...v2.1">https://github.com/codespell-project/actions-codespell/compare/v2...v2.1</a></p>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/codespell-project/actions-codespell/commit/406322ec52dd7b488e48c1c4b82e2a8b3a1bf630"><code>406322e</code></a>
[pre-commit.ci] pre-commit autoupdate (<a
href="https://redirect.github.com/codespell-project/actions-codespell/issues/76">#76</a>)</li>
<li><a
href="https://github.com/codespell-project/actions-codespell/commit/3174815d6231f5bdc24dbfb6fc3b8caec73d521c"><code>3174815</code></a>
feat: bump to use node20 runtime (<a
href="https://redirect.github.com/codespell-project/actions-codespell/issues/71">#71</a>)</li>
<li><a
href="https://github.com/codespell-project/actions-codespell/commit/8edd9f294002b35e8d7de67b06ac493e89114b91"><code>8edd9f2</code></a>
Bump actions/setup-python from 4 to 5 (<a
href="https://redirect.github.com/codespell-project/actions-codespell/issues/74">#74</a>)</li>
<li><a
href="https://github.com/codespell-project/actions-codespell/commit/8dc81685022bbd5008e21ddb6f44abe4eb4f27b1"><code>8dc8168</code></a>
Bump actions/checkout from 3 to 4 (<a
href="https://redirect.github.com/codespell-project/actions-codespell/issues/72">#72</a>)</li>
<li><a
href="https://github.com/codespell-project/actions-codespell/commit/41170f1b9c4f5c5788cb677c6c2f9ef26010243d"><code>41170f1</code></a>
Use v2 in README (<a
href="https://redirect.github.com/codespell-project/actions-codespell/issues/69">#69</a>)</li>
<li>See full diff in <a
href="https://github.com/codespell-project/actions-codespell/compare/v2.0...v2.1">compare
view</a></li>
</ul>
</details>
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2025-07-21 09:30:41 -04:00
Sydney RunkleandGitHub 03bec97767 feat(sdk-py): add interrupts to thread state (#5580) 2025-07-20 23:46:38 +00:00
AG2AI-AdminandGitHub dd9b5c42e8 chore(docs): Migrate from pyautogen to ag2 Library (#5577) 2025-07-20 19:43:54 -04:00
Eugene YurtsevandGitHub 951a3f2d1c ci: Update privileged.yml (#5481) 2025-07-20 17:34:20 -04:00
Sakshi GuptaandGitHub adaa340c15 fix(docs): jokes needs reducer in graph-api.md (#5489) (#5489) 2025-07-20 17:32:47 -04:00
Yagnesh M. BhadiyadraandGitHub 2c85cba9ca fix(docs): Change of condition arguments in Command API example for ease of reading. (#5571) 2025-07-20 20:58:37 +00:00
cb7b924006 feat: Implement durability mode argument (#5432)
- Replaces checkpoint_during: bool
- checkpoint_during is deprecated but still respected
- We implement three durability modes (from least to most durable):
- "exit" - save checkpoint only when the graph exits (equivalent to
checkpoint_during=False)
- "async" - save checkpoint asynchronously while the next step executes
(the default, equivalent to old checkpoint_during=True)
- "sync" - save checkpoint synchronously before the next step starts
(new mode, slower but most durable)

Co-authored-by: Sydney Runkle <54324534+sydney-runkle@users.noreply.github.com>
2025-07-20 15:42:18 +01:00
Sydney RunkleandGitHub c61ac946af feat(docs): add python alt for UI how to (#5593)
Fixes https://github.com/langchain-ai/langgraph/issues/5311
2025-07-20 09:33:17 -04:00
Andrew NguonlyandGitHub 61676b8db0 docs: Change 'that' to 'than' (#5581) 2025-07-18 14:54:55 -07:00
langchain-infraandGitHub 3b85e53360 docs: fix egress formatting (#5575) 2025-07-18 10:43:03 -04:00
infra 250a17d711 docs: fix egress formatting 2025-07-18 09:42:46 -05:00
Eugene YurtsevandGitHub f63bec8578 chore(prebuilt): restructure tool node and tool injection logic (#5562)
* Cleaning up the underlying tool injection logic which is happening in
multiple locations.
* State was being injected into the ToolCall via Send in two places in
create react agent and the logic doesn't belong there, the actual
injection should be happening inside the ToolNode where there's
awareness of what run time parameters the tool accepts.

Change is required to unblock:
https://github.com/langchain-ai/langgraph/pull/5537
2025-07-18 09:59:14 -04:00
langchain-infraandGitHub dc0f0c5944 docs: add egress docs for LGP self hosted (#5569) 2025-07-18 03:14:40 -04:00
infra 777fe692d4 docs: add egress docs for LGP self hosted 2025-07-18 00:40:15 -04:00
infra fdbe31a3aa docs: add egress docs for LGP self hosted 2025-07-18 00:28:04 -04:00
Sam CrowderandGitHub 78a9933144 docs: [LangGraph Server Changelog Bot] Changelog updates for new version(s) (#5561) 2025-07-17 20:45:42 -07:00
Eugene YurtsevandGitHub 5717eefa79 feat(docs): Document disabling webhooks (#5535)
Add information about disabling webhooks
2025-07-17 15:23:00 -04:00
5978012619 release(cli): Release new CLI version with increased bounds for server (#5565)
Co-authored-by: Sydney Runkle <54324534+sydney-runkle@users.noreply.github.com>
2025-07-17 12:22:30 -07:00
Eugene YurtsevandGitHub b447a1c7cf fix(docs): fix langgraph cli reference (#5563)
Fix for wrong indentation that completely messes up formatting
2025-07-17 12:10:11 -07:00
open-swe[bot]GitHubopen-swe-dev[bot] <open-swe-dev@users.noreply.github.com>Eugene Yurtsev
f87608a16f chore(prebuilt): Remove dead code from prebuilt tests (#5555)
Fixes #5554

This PR removes unused utility classes and functions from the prebuilt
tests directory to clean up dead code.

Changes include:
- Removed unused classes from `libs/prebuilt/tests/any_str.py`:
  - Deleted FloatBetween, AnyDict, AnyVersion, and UnsortedSequence
  - Kept only AnyStr class

- Removed unused functions from `libs/prebuilt/tests/messages.py`:
  - Deleted _AnyIdDocument and _AnyIdAIMessageChunk
  - Kept _AnyIdHumanMessage and _AnyIdToolMessage

- Removed unused classes from `libs/prebuilt/tests/memory_assert.py`:
- Deleted NoopSerializer, MemorySaverAssertCheckpointMetadata, and
MemorySaverNoPending
  - Kept MemorySaverAssertImmutable

Verification:
- Manually checked for no remaining references to removed code
- Maintained existing import structures
- Preserved functionality of the prebuilt test suite

The changes reduce code complexity and remove unnecessary utility
classes that were not being used in the test suite.

---------

Co-authored-by: open-swe-dev[bot] <open-swe-dev@users.noreply.github.com>
Co-authored-by: Eugene Yurtsev <eyurtsev@gmail.com>
2025-07-17 18:45:10 +00:00
Sydney RunkleandGitHub a5fe3316b6 chore(langgraph): bump api version and prep for v0.6 alpha (#5559)
Bumping version on `v1` branch so that we can access most recent
`langgraph-cli[inmem]` changes (with v0.6 compat) for store injection.
2025-07-17 14:40:09 -04:00
Sam Crowder e0699fbdaf Update changelog via LangGraph Server Changelog Bot 2025-07-17 11:04:52 -07:00
Lauren Hirata SinghandGitHub b4eb57da67 docs: Rearrange nav (#5560)
Move Prebuilts overview and Run an agent to the guides page
2025-07-17 13:47:43 -04:00
Sam CrowderandGitHub cec3bef7ea docs: [LangGraph Server Changelog Bot] Changelog updates for new version(s) (#5558)
Automated changelog update created by the LangGraph Server Changelog
Bot.

Feel free to merge anytime.
2025-07-17 12:41:13 -04:00
Sydney RunkleandGitHub adc732272c refactor(langgraph): improve Runtime interface re patch/overrides (#5546) 2025-07-17 09:57:25 -04:00
Nuno Campos 71dc92b349 langgraph-checkpoint 2.1.1 2025-07-17 15:04:57 +02:00
79b4642e55 fix(docs): broken URL in _AIO_ERROR_MSG for AsyncSqliteSaver (#5483)
remove unreachable `yield` from unimplemented async methods

---------

Co-authored-by: Nuno Campos <nuno@langchain.dev>
2025-07-17 12:26:22 +00:00
Nuno CamposandGitHub 48446bcbd2 chore(docs): Mention dataclass (#5470) 2025-07-17 14:23:41 +02:00
Nuno CamposandGitHub cf95c870fe fix(checkpoint): fix AsyncBatchedBaseStore getting stuck (#5504) 2025-07-17 12:50:18 +02:00
Nuno CamposandGitHub a34c38a53d docs: [LangGraph Server Changelog Bot] Changelog updates for new version(s) (#5547) 2025-07-17 12:24:24 +02:00
Sam Crowder db5276ded1 Update changelog via LangGraph Server Changelog Bot 2025-07-16 16:32:19 -07:00
Sam CrowderandGitHub 9c67b9ce4b docs(docs): add disclaimer about overriding otel with DD_API_KEY (#5538) 2025-07-16 16:06:54 -07:00
Lauren Hirata SinghandGitHub 08667fe786 docs: More tracing (#5545)
docs: add more about tracing
2025-07-16 19:06:43 -04:00
Sydney Runkle c6d674cd3e Merge branch 'main' into v1 2025-07-16 18:32:07 -04:00
Sydney RunkleandGitHub 294078adab release(langgraph): revert alpha release, going to do v0.6 off main instead (#5543)
Revert "release(langgraph): v1.0.0a1 (#5520)"

This reverts commit 2eecaa8500.
2025-07-16 18:30:43 -04:00
Sam CrowderandGitHub 48dabc0538 docs: [LangGraph Server Changelog Bot] Changelog updates for new version(s) (#5540)
Update changelog via LangGraph Server Changelog Bot
2025-07-16 18:24:46 -04:00
d2cc02d789 Update docs/docs/cloud/reference/env_var.md
Co-authored-by: Lauren Hirata Singh <lauren@langchain.dev>
2025-07-16 14:17:56 -07:00
Lauren Hirata SinghandGitHub 92c66d13ec docs: add o11y overview (#5542)
* docs: add o11y overview

* add section for enabling tracing
2025-07-16 16:32:11 -04:00
Sam Crowder 7f821deded remove word tracing 2025-07-16 11:36:16 -07:00
Sam Crowder 12a601c8a3 fix: add disclaimer to the docs about DD_API_KEY overriding app-level tracing 2025-07-16 11:35:48 -07:00
Eugene YurtsevandGitHub d64447c4c2 chore(prebuilt): Allow testing fast (#5533)
Allow testing fast
2025-07-16 15:56:28 +00:00
0d2db35d93 docs: [LangGraph Server Changelog Bot] Changelog updates for new version(s) (#5530)
* Update changelog via LangGraph Server Changelog Bot

* Update docs/docs/cloud/reference/langgraph_server_changelog.md

* Update docs/docs/cloud/reference/langgraph_server_changelog.md

---------

Co-authored-by: William FH <13333726+hinthornw@users.noreply.github.com>
2025-07-16 14:01:46 +00:00
Sydney RunkleandGitHub 6e9e1ca146 refactor(langgraph): make constants generally private with a few select exports (#5529) 2025-07-16 09:27:04 -04:00
renchaoandGitHub b290e1ffdc docs(mcp): update workflow usage examples (#5525)
Update mcp.md

 "END" is missing
2025-07-16 13:21:26 +00:00
Nuno Campos a5eb6a75bf checkpoint-postgres 2.0.23 2025-07-16 11:58:07 +02:00
Nuno CamposandGitHub 7a136aaff6 perf(checkpoint-postgres): Reduce writes to checkpoint_blobs table (#5524) 2025-07-16 11:57:11 +02:00
Nuno Campos e973e936c3 perf: checkpoint-postgres: Reduce writes to checkpoint_blobs table
- Channels containing primitive values don't need to be stored in separate rows in blobs table, as the overhead of a separate row will usually be higher than the size of the value
- This applies for instance to all internal channels used to manage edges, so it has a big impact just from that. It can also apply to user-managed channels depending on their values
- The same channel may switch storage between versions without any issue
2025-07-16 11:43:51 +02:00
066f3b21f8 docs: [LangGraph Server Changelog Bot] Changelog updates for new version(s) (#5523)
* Update changelog via LangGraph Server Changelog Bot

* Update docs/docs/cloud/reference/langgraph_server_changelog.md

---------

Co-authored-by: William FH <13333726+hinthornw@users.noreply.github.com>
2025-07-16 06:39:09 +00:00
Sydney RunkleandGitHub 2eecaa8500 release(langgraph): v1.0.0a1 (#5520)
prep for alpha release
2025-07-15 16:23:59 -04:00
Sydney RunkleandGitHub d935a2d110 refactor(langgraph): move typing constructs in constants.py -> _internal/_typing.py (#5518) 2025-07-15 16:13:34 -04:00
+3 d5b8733a40 ci(docs): Add codespell for docs md and py files (#5494)
* docs: Add codespell for markdown files

* update

* remove path

* fix

* update linting guidelines

* chore[deps]: upgrade dependencies with `uv lock --upgrade` (#5471)

Co-authored-by: sydney-runkle <54324534+sydney-runkle@users.noreply.github.com>

* fix(checkpoint): correct logging call to use logger (#5458)

fix[checkpoint]: correct logging call to use logger

* release(langgraph): v0.5.3 (#5498)

bump

* extend to cover python files used for reference docs

* fix(docs): Update the graph image link (#5500)

Update the graph image link

Point to the correct image reference for Map-Reduce and the Send API example

* fix(docs): Update graph-api.md File to reflect correct image (#5499)

Update graph-api.md File to reflect correct image

Referencing to the correct image file

* docs(prebuilt): improve documentation in ToolNode module (#5497)

Update documentation in ToolNode module

* Update changelog via LangGraph Server Changelog Bot

* feat(sdk-py): Show is_studio_user (#5505)

* Update changelog via LangGraph Server Changelog Bot

* fix(docs): Node caching explanation code required a small fix,. (#5473)

fix(docs): Node caching explanation code required a small fix, to avoid confusion to readers. The code had `time.sleep(2)` but the note mentioned one second only.

Co-authored-by: ygicp <yagnesh@infocusp.com>

* fix(langgraph): add `stacklevel=2` to the warnings to point to the caller’s codes (#5457)

chore: add stacklevel=2 to the warnings to point to the caller’s codes

* chore(docs): Improve example in use mcp (#5480)

* Make example more explicit

* Update docs/docs/agents/mcp.md

* fix(docs): update examples link (#5515)

Co-authored-by: ahmed murtaza <ahmed.gmurtaza@gmail.com>

* docs: [LangGraph Server Changelog Bot] Changelog updates for new version(s) (#5514)

Update changelog via LangGraph Server Changelog Bot

* fix readmes

* fix

---------

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Co-authored-by: ahmed murtaza <ahmed.gmurtaza@gmail.com>
2025-07-15 19:22:48 +00:00
Lauren Hirata SinghandGitHub 40c0e44b9a docs: Update with links to Forum (#5440)
Also updates some outdated references to LangChain
2025-07-15 14:55:15 -04:00
Mason DaughertyandGitHub b5afec4b2a chore: add PR template (#5491) 2025-07-15 14:48:59 -04:00
Sam CrowderandGitHub d674e1bddd docs: [LangGraph Server Changelog Bot] Changelog updates for new version(s) (#5514)
Update changelog via LangGraph Server Changelog Bot
2025-07-15 11:13:18 -04:00
8c68f739b9 fix(docs): update examples link (#5515)
Co-authored-by: ahmed murtaza <ahmed.gmurtaza@gmail.com>
2025-07-15 15:03:56 +00:00
Eugene YurtsevandGitHub 1500ebd3d7 chore(docs): Improve example in use mcp (#5480)
* Make example more explicit

* Update docs/docs/agents/mcp.md
2025-07-15 15:01:16 +00:00
Sydney RunkleandGitHub 0837263542 feat(langgraph): new context api (replacing config['configurable'] and config_schema) (#5243) 2025-07-15 09:20:20 -04:00
Michael LiandGitHub 18633bc99e fix(langgraph): add stacklevel=2 to the warnings to point to the caller’s codes (#5457)
chore: add stacklevel=2 to the warnings to point to the caller’s codes
2025-07-15 01:01:29 +00:00
2558f81889 fix(docs): Node caching explanation code required a small fix,. (#5473)
fix(docs): Node caching explanation code required a small fix, to avoid confusion to readers. The code had `time.sleep(2)` but the note mentioned one second only.

Co-authored-by: ygicp <yagnesh@infocusp.com>
2025-07-15 00:58:32 +00:00
Sam CrowderandGitHub b832fefc58 docs: [LangGraph Server Changelog Bot] Changelog updates for new version(s) (#5506) 2025-07-14 17:11:02 -07:00
Sam Crowder 444d699fe8 Update changelog via LangGraph Server Changelog Bot 2025-07-14 17:04:46 -07:00
Darren Clark 0d8dfa7bba fix(checkpoint): fix AsyncBatchedBaseStore getting stuck
This commit fixes #5503

Gist of it is:

- `asyncio.exception.InvalidStateError` were being raised when the
  future was cancelled
- this exception bubbled up and killed the background task
- `AsyncBatchedBaseStore` stopped doing queries because the background
  task wasn't running anymore

This commit adds some "if future is not done" checks to guard against
this.
2025-07-14 18:03:51 -04:00
Sydney RunkleandGitHub e0bf4a7bc3 Merge branch 'main' into v1 2025-07-14 12:54:11 -04:00
William Fu-Hinthorn a71eb09488 chore[docs]: Mention dataclass 2025-07-12 14:11:25 -07:00
Sydney RunkleandGitHub 5f00938aa2 feat(langgraph): add type checking for matching node signatures vs input_schema for add_node (#5424) 2025-07-10 09:42:37 -04:00
Sydney RunkleandGitHub e5ded1888b Merge branch 'main' into v1 2025-07-09 15:26:08 -04:00
Sydney RunkleandGitHub d1710e2eac change[langgraph]: clean up Interrupt interface for v1 (#5405) 2025-07-09 14:03:08 -04:00
Sydney RunkleandGitHub e5947bcd30 Merge branch 'main' into v1 2025-07-09 13:06:41 -04:00
Sydney RunkleandGitHub b6dc566ec7 Merge branch 'main' into v1 2025-07-08 14:55:09 -04:00
Sydney Runkle a84b744eb6 Merge branch 'main' into v1 2025-07-08 09:55:13 -04:00
Sydney RunkleandGitHub f5b888dd72 run CI on v1 branch temporarily (#5341)
temporarily run CI on v1 as well
2025-07-03 23:53:38 +00:00
Sydney RunkleandGitHub 7a8f29847b fix conflicts in state.py (#5340)
* fix conflicts
* lockfile fixes
2025-07-03 23:33:39 +00:00
Sydney RunkleandGitHub f001246794 Merge branch 'main' into v1 2025-07-03 19:27:07 -04:00
Sydney Runkle b7d11b4141 Merge branch 'main' into v1 2025-07-02 17:23:45 -04:00
Sydney RunkleandGitHub 1d3fd9a46b chore: merge main into v1 (#5324) 2025-07-02 17:13:31 -04:00
Sydney RunkleandGitHub 8c4e698c5a langgraph[change]: solidify public/private differentiations (#5252)
* public interfaces for channels
* public interfaces for func
* public interfaces for graph
* pi for managed
* first pass public interface for top level modules
* first pass at private for utils -> _internal
* private interface for pregel
* scratchpad/stream protocol move
* docs update
* backwards compat for runnable
* deprecation warning for send and interrupt
* deprecation for pregel import
2025-07-02 16:48:53 -04:00
Sydney RunkleandGitHub c989f1c898 langgraph: remove support for thread_ts (old alias for checkpoint_id) (#5295)
* remove support for thread_ts

* docs and tests
2025-07-01 13:42:25 -04:00
196 changed files with 7000 additions and 5936 deletions
+11 -11
View File
@@ -1,29 +1,29 @@
name: "\U0001F41B Bug Report"
description: Report a bug in LangGraph. To report a security issue, please instead use the security option below. For questions, please use the GitHub Discussions.
description: Report a bug in LangGraph. To report a security issue, please instead use the security option below. For questions, please use the LangChain Forum at forum.langchain.com.
labels: [pending,bug]
body:
- type: markdown
attributes:
value: >
value: |
Thank you for taking the time to file a bug report.
Use this to report BUGS in LangGraph. For usage questions, feature requests and general design questions, please use [GitHub Discussions](https://github.com/langchain-ai/langgraph/discussions).
Use this to report BUGS in LangGraph. For usage questions, feature requests and general design questions, please use the [LangChain Forum](https://forum.langchain.com/).
Relevant links to check before filing a bug report to see if your issue has already been reported, fixed or
if there's another way to solve your problem:
[LangGraph Github Discussions](https://github.com/langchain-ai/langgraph/discussions),
[LangGraph Github Issues](https://github.com/langchain-ai/langgraph/issues),
[LangGraph how-to guides](https://langchain-ai.github.io/langgraph/how-tos/).
[LangChain documentation with the integrated search](https://python.langchain.com/docs/get_started/introduction),
[GitHub search](https://github.com/langchain-ai/langgraph),
* [LangChain Forum](https://forum.langchain.com/),
* [LangGraph Github Issues](https://github.com/langchain-ai/langgraph/issues),
* [LangGraph how-to guides](https://langchain-ai.github.io/langgraph/how-tos/).
* [LangChain documentation with the integrated search](https://python.langchain.com/docs/get_started/introduction),
* [GitHub search](https://github.com/langchain-ai/langgraph),
- type: checkboxes
id: checks
attributes:
label: Checked other resources
description: Before submitting this issue, please confirm that you have completed all the steps below by checking each option. These steps help ensure your issue is well-defined, relevant, and actionable.
options:
- label: This is a bug, not a usage question. For questions, please use GitHub Discussions.
- label: This is a bug, not a usage question. For questions, please use the LangChain Forum (https://forum.langchain.com/).
required: true
- label: I added a clear and detailed title that summarizes the issue.
required: true
@@ -38,7 +38,7 @@ body:
attributes:
label: Example Code
description: |
Please add a self-contained, [minimal, reproducible, example](https://stackoverflow.com/help/minimal-reproducible-example) with your use case.
Please add a self-contained, [minimal, reproducible, example](https://stackoverflow.com/help/minimal-reproducible-example) with your use case. Replace this code with your own!
placeholder: |
from langgraph.graph import StateGraph
@@ -78,7 +78,7 @@ body:
attributes:
label: System Info
description: |
python -m langchain_core.sys_info
Run on your machine: `python -m langchain_core.sys_info`
placeholder: |
python -m langchain_core.sys_info
validations:
+2 -4
View File
@@ -1,8 +1,6 @@
blank_issues_enabled: false
version: 2.1
contact_links:
- name: Feature Request
url: https://github.com/langchain-ai/langgraph/discussions/categories/ideas
about: Suggest a feature or an idea
- name: LangChain Forum
url: https://forum.langchain.com/
about: General community discussions and support
about: General community discussions, support, and feature requests
+12 -8
View File
@@ -1,25 +1,29 @@
name: 🔒 Privileged
description: You are a LangChain maintainer, or was asked directly by a maintainer to create an issue here. If not, check the other options.
description: You are a LangGraph maintainer, or was asked directly by a maintainer to create an issue here. If not, check the other options.
body:
- type: markdown
attributes:
value: |
Thanks for your interest in LangChain! 🚀
If you are not a LangChain maintainer or were not asked directly by a maintainer to create an issue, then please start the conversation in a [Question in GitHub Discussions](https://github.com/langchain-ai/langchain/discussions/categories/q-a) instead.
You are a LangChain maintainer if you maintain any of the packages inside of the LangChain repository
or are a regular contributor to LangChain with previous merged merged pull requests.
Thanks for your interest in LangGraph! 🚀
If you are not a LangGraph maintainer or were not asked directly by a maintainer to create an issue, then please start the conversation on the [LangChain Forum](https://forum.langchain.com/) instead.
You are a LangGraph maintainer if you maintain any of the packages inside of the LangGraph repository
or are a regular contributor to LangGraph with previous merged merged pull requests.
- type: checkboxes
id: privileged
attributes:
label: Privileged issue
description: Confirm that you are allowed to create an issue here.
options:
- label: I am a LangChain maintainer, or was asked directly by a LangChain maintainer to create an issue here.
- label: I am a LangGraph maintainer, or was asked directly by a LangGraph maintainer to create an issue here.
required: true
- type: textarea
id: content
attributes:
label: Issue Content
description: Add the content of the issue here.
- type: markdown
attributes:
value: |
Community members should **NOT** work on Privileged issues unless these issues have been explicitly marked with a "help-wanted" tag.
+31
View File
@@ -0,0 +1,31 @@
Thank you for contributing to LangGraph! Follow these steps to mark your pull request as ready for review. **If any of these steps are not completed, your PR will not be considered for review.**
- [ ] **PR title**: Follows the format: {TYPE}({SCOPE}): {DESCRIPTION}
- Examples:
- feat(core): add multi-tenant support
- fix(cli): resolve flag parsing error
- docs(openai): update API usage examples
- Allowed `{TYPE}` values:
- feat, fix, docs, style, refactor, perf, test, build, ci, chore, revert, release
- Allowed `{SCOPE}` values (optional):
- langgraph, docs, cli, checkpoint, checkpoint-postgres, checkpoint-sqlite, prebuilt, scheduler-kafka, sdk-py
- Once you've written the title, please delete this checklist item; do not include it in the PR.
- [ ] **PR message**: ***Delete this entire checklist*** and replace with
- **Description:** a description of the change. Include a [closing keyword](https://docs.github.com/en/issues/tracking-your-work-with-issues/using-issues/linking-a-pull-request-to-an-issue#linking-a-pull-request-to-an-issue-using-a-keyword) if applicable.
- **Issue:** the issue # it fixes, if applicable
- **Dependencies:** any dependencies required for this change
- **Twitter handle:** if your PR gets announced, and you'd like a mention, we'll gladly shout you out!
- [ ] **Add tests and docs**: If you're adding a new integration, you must include:
1. A test for the integration, preferably unit tests that do not rely on network access,
2. An example notebook showing its use. It lives in `docs/docs/integrations` directory.
- [ ] **Lint and test**: Run `make format`, `make lint` and `make test` from the root of the package(s) you've modified. We will not consider a PR unless these three are passing in CI. See [contribution guidelines](https://github.com/langchain-ai/langgraph/blob/main/CONTRIBUTING.md) for more.
Additional guidelines:
- Make sure optional dependencies are imported within a function.
- Please do not add dependencies to `pyproject.toml` files (even optional ones) unless they are **required** for unit tests.
- Most PRs should not touch more than one package.
- Changes should be backwards compatible.
+1 -1
View File
@@ -3,7 +3,7 @@ name: CI
on:
push:
branches: [main]
branches: [main, v1]
pull_request:
permissions:
@@ -0,0 +1,11 @@
LangChain
LangGraph
LangSmith
thead
stdio
nd
jupyter
lets
lite
uis
deque
+9 -3
View File
@@ -34,10 +34,16 @@
id: extract_ignore_words
- name: Codespell
uses: codespell-project/actions-codespell@v2
uses: codespell-project/actions-codespell@v2.1
with:
skip: '*.ambr,*.lock,*.ipynb,*.yaml,*.zlib,*.md'
skip: '*.ambr,*.lock,*.ipynb,*.yaml,*.zlib,*.css.map,*.js.map'
ignore_words_list: ${{ steps.extract_ignore_words.outputs.ignore_words_list }}
# We do this to avoid spellchecking cell outputs
- name: Codespell Notebooks
run: make codespell
run: make codespell
- name: Codespell LangGraph Library
run: |
# Change to root directory to check the main LangGraph library
cd ..
codespell --skip="*.ambr,*.lock,*.ipynb,*.yaml,*.zlib,*.css.map,*.js.map,*.pyc,__pycache__/*" --ignore-words-list="${{ steps.extract_ignore_words.outputs.ignore_words_list }}" libs/langgraph/langgraph/
+8 -9
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@@ -9,7 +9,7 @@ Here are some things to keep in mind for all types of contributions:
- Follow the ["fork and pull request"](https://docs.github.com/en/get-started/exploring-projects-on-github/contributing-to-a-project) workflow.
- Fill out the checked-in pull request template when opening pull requests. Note related issues and tag relevant maintainers.
- Ensure your PR passes formatting, linting, and testing checks before requesting a review.
- If you would like comments or feedback, please open an issue or discussion and tag a maintainer.
- If you would like comments or feedback, please tag a maintainer.
- Backwards compatibility is key. Your changes must not be breaking, except in case of critical bug and security fixes.
- Look for duplicate PRs or issues that have already been opened before opening a new one.
- Keep scope as isolated as possible. As a general rule, your changes should not affect more than one package at a time.
@@ -20,7 +20,7 @@ For bug fixes, please open up an issue before proposing a fix to ensure the prop
### New features
For new features, please start a new [discussion](https://github.com/langchain-ai/langgraph/discussions), where the maintainers will help with scoping out the necessary changes.
For new features, please start a new [discussion](https://forum.langchain.com/), where the maintainers will help with scoping out the necessary changes.
## Contribute Documentation
@@ -111,7 +111,6 @@ in a more abstract way than how-to guides or tutorials, and should be geared tow
gaining a deeper understanding of the framework. Try to avoid excessively large code examples. The goal here is to
impart perspective to the user rather than to finish a practical project. These guides should cover **why** things work the way they do.
To quote the Diataxis website:
> The perspective of explanation is higher and wider than that of the other types. It does not take the users eye-level view, as in a how-to guide, or a close-up view of the machinery, like reference material. Its scope in each case is a topic - “an area of knowledge”, that somehow has to be bounded in a reasonable, meaningful way.
@@ -187,9 +186,9 @@ Be concise, including in code samples.
## Setup
LangChain documentation consists of two components:
LangGraph documentation consists of two components:
1. Main Documentation: Hosted at [https://langchain-ai.github.io](https://langchain-ai.github.io/langgraph/),
1. Main Documentation: Hosted at [https://langchain-ai.github.io/langgraph/](https://langchain-ai.github.io/langgraph/),
this comprehensive resource serves as the primary user-facing documentation.
It covers a wide array of topics, including tutorials, use cases, integrations,
and more, offering extensive guidance on building with LangGraph.
@@ -250,17 +249,17 @@ make serve-docs
#### Linting
The documentation is linted from the **monorepo root**. To lint it, run the following from there:
To spell check the docs, run the following from the `docs` directory:
```bash
make spellcheck
codespell --skip="*.ambr,*.lock,*.ipynb,*.yaml,*.zlib,*.css.map,*.js.map" --ignore-words-list="infor,thead,stdio,nd,jupyter,lets,lite,uis,deque" .
```
### In-code Documentation
The in-code documentation is autogenerated from docstrings.
For the API reference to be useful, the codebase must be well-documented. This means that all functions, classes, and methods should have a docstring that explains what they do, what the arguments are, and what the return value is. This is a good practice in general, but it is especially important for LangChain because the API reference is the primary resource for developers to understand how to use the codebase.
For the API reference to be useful, the codebase must be well-documented. This means that all functions, classes, and methods should have a docstring that explains what they do, what the arguments are, and what the return value is. This is a good practice in general, but it is especially important for LangGraph because the API reference is the primary resource for developers to understand how to use the codebase.
We generally follow the [Google Python Style Guide](https://google.github.io/styleguide/pyguide.html#38-comments-and-docstrings) for docstrings.
@@ -291,4 +290,4 @@ def my_function(arg1: int, arg2: str) -> float:
This is a description of the return value.
"""
return 3.14
```
```
+2 -2
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@@ -73,7 +73,7 @@ While LangGraph can be used standalone, it also integrates seamlessly with any L
- [Guides](https://langchain-ai.github.io/langgraph/how-tos/): Quick, actionable code snippets for topics such as streaming, adding memory & persistence, and design patterns (e.g. branching, subgraphs, etc.).
- [Reference](https://langchain-ai.github.io/langgraph/reference/graphs/): Detailed reference on core classes, methods, how to use the graph and checkpointing APIs, and higher-level prebuilt components.
- [Examples](https://langchain-ai.github.io/langgraph/tutorials/overview/): Guided examples on getting started with LangGraph.
- [Examples](https://langchain-ai.github.io/langgraph/examples/): Guided examples on getting started with LangGraph.
- [LangChain Forum](https://forum.langchain.com/): Connect with the community and share all of your technical questions, ideas, and feedback.
- [LangChain Academy](https://academy.langchain.com/courses/intro-to-langgraph): Learn the basics of LangGraph in our free, structured course.
- [Templates](https://langchain-ai.github.io/langgraph/concepts/template_applications/): Pre-built reference apps for common agentic workflows (e.g. ReAct agent, memory, retrieval etc.) that can be cloned and adapted.
@@ -81,4 +81,4 @@ While LangGraph can be used standalone, it also integrates seamlessly with any L
## Acknowledgements
LangGraph is inspired by [Pregel](https://research.google/pubs/pub37252/) and [Apache Beam](https://beam.apache.org/). The public interface draws inspiration from [NetworkX](https://networkx.org/documentation/latest/). LangGraph is built by LangChain Inc, the creators of LangChain, but can be used without LangChain.
LangGraph is inspired by [Pregel](https://research.google/pubs/pub37252/) and [Apache Beam](https://beam.apache.org/). The public interface draws inspiration from [NetworkX](https://networkx.org/documentation/latest/). LangGraph is built by LangChain Inc, the creators of LangChain, but can be used without LangChain.
+32 -22
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@@ -12,56 +12,64 @@ LangGraph provides **three** primary ways to supply context:
| Type | Description | Mutable? | Lifetime |
|------------------------------------------------------------------------------|-----------------------------------------------|----------|-------------------------|
| [**Config**](#config-static-context) | data passed at the start of a run | ❌ | per run |
| [**Runtime Context**](#runtime-context) | data passed at the start of a run | ❌ | per run |
| [**Short-term memory (State)**](#short-term-memory-mutable-context) | dynamic data that can change during execution | ✅ | per run or conversation |
| [**Long-term memory (Store)**](#long-term-memory-cross-conversation-context) | data that can be shared between conversations | ✅ | across conversations |
## Provide runtime context
### Runtime Context
### Config (static context)
!!! note "`config['configurable']` -> `runtime.context`"
Config is for immutable data like user metadata or API keys. Use
when you have values that don't change mid-run.
In LangGraph < v1.0, static runtime context was passed via the `config['configurable']` key, paired with a `config_schema` argument
to `StateGraph` or `Pregel`. This is now deprecated and will be removed in v2.0.
Specify configuration using a key called **"configurable"** which is reserved
for this purpose:
As of LangGraph v1.0, the Runtime object is recommended to access static context and runtime-specific information like the store and stream writer.
Runtime context is for immutable data like user metadata or API keys. Use this when you have values that don't change mid-run.
Specify static context via the `context` argument to `invoke` / `stream`, which is reserved for this purpose:
```python
@dataclass
class ContextSchema:
user_name: str
graph.invoke( # (1)!
{"messages": [{"role": "user", "content": "hi!"}]}, # (2)!
# highlight-next-line
config={"configurable": {"user_id": "user_123"}} # (3)!
context={"user_name": "John Smith"} # (3)!
)
```
1. This is the invocation of the agent or graph. The `invoke` method runs the underlying graph with the provided input.
2. This example uses messages as an input, which is common, but your application may use different input structures.
3. This is where you pass the configuration data. The `config` parameter allows you to provide additional context that the agent can use during its execution.
3. This is where you pass the runtime data. The `context` parameter allows you to provide additional dependencies that the agent can use during its execution.
=== "Agent prompt"
```python
from langchain_core.messages import AnyMessage
from langchain_core.runnables import RunnableConfig
from langgraph.runtime import get_runtime
from langgraph.prebuilt.chat_agent_executor import AgentState
from langgraph.prebuilt import create_react_agent
# highlight-next-line
def prompt(state: AgentState, config: RunnableConfig) -> list[AnyMessage]:
user_name = config["configurable"].get("user_name")
system_msg = f"You are a helpful assistant. Address the user as {user_name}."
def prompt(state: AgentState) -> list[AnyMessage]:
runtime = get_runtime(ContextSchema)
system_msg = f"You are a helpful assistant. Address the user as {runtime.context.user_name}."
return [{"role": "system", "content": system_msg}] + state["messages"]
agent = create_react_agent(
model="anthropic:claude-3-7-sonnet-latest",
tools=[get_weather],
prompt=prompt
prompt=prompt,
context_schema=ContextSchema
)
agent.invoke(
{"messages": [{"role": "user", "content": "what is the weather in sf"}]},
# highlight-next-line
config={"configurable": {"user_name": "John Smith"}}
context={"user_name": "John Smith"}
)
```
@@ -70,11 +78,11 @@ graph.invoke( # (1)!
=== "Workflow node"
```python
from langchain_core.runnables import RunnableConfig
from langgraph.runtime import Runtime
# highlight-next-line
def node(state: State, config: RunnableConfig):
user_name = config["configurable"].get("user_name")
def node(state: State, config: Runtime[ContextSchema]):
user_name = runtime.context.user_name
...
```
@@ -83,14 +91,16 @@ graph.invoke( # (1)!
=== "In a tool"
```python
from langchain_core.runnables import RunnableConfig
from langgraph.runtime import get_runtime
@tool
# highlight-next-line
def get_user_info(config: RunnableConfig) -> str:
def get_user_email() -> str:
"""Retrieve user information based on user ID."""
user_id = config["configurable"].get("user_id")
return "User is John Smith" if user_id == "user_123" else "Unknown user"
# simulate fetching user info from a database
runtime = get_runtime(ContextSchema)
email = get_user_email_from_db(runtime.context.user_name)
return email
```
See the [tool calling guide](../how-tos/tool-calling.md#configuration) for details.
+41 -14
View File
@@ -55,14 +55,16 @@ The `langchain-mcp-adapters` package enables agents to use tools defined across
=== "In a workflow"
```python
```python title="Workflow using MCP tools with ToolNode"
from langchain_mcp_adapters.client import MultiServerMCPClient
from langgraph.graph import StateGraph, MessagesState, START
from langgraph.prebuilt import ToolNode, tools_condition
from langchain.chat_models import init_chat_model
model = init_chat_model("openai:gpt-4.1")
from langgraph.graph import StateGraph, MessagesState, START, END
from langgraph.prebuilt import ToolNode
# Initialize the model
model = init_chat_model("anthropic:claude-3-5-sonnet-latest")
# Set up MCP client
client = MultiServerMCPClient(
{
"math": {
@@ -80,22 +82,47 @@ The `langchain-mcp-adapters` package enables agents to use tools defined across
)
tools = await client.get_tools()
def call_model(state: MessagesState):
response = model.bind_tools(tools).invoke(state["messages"])
return {"messages": response}
# Bind tools to model
model_with_tools = model.bind_tools(tools)
# Create ToolNode
tool_node = ToolNode(tools)
def should_continue(state: MessagesState):
messages = state["messages"]
last_message = messages[-1]
if last_message.tool_calls:
return "tools"
return END
# Define call_model function
async def call_model(state: MessagesState):
messages = state["messages"]
response = await model_with_tools.ainvoke(messages)
return {"messages": [response]}
# Build the graph
builder = StateGraph(MessagesState)
builder.add_node(call_model)
builder.add_node(ToolNode(tools))
builder.add_node("call_model", call_model)
builder.add_node("tools", tool_node)
builder.add_edge(START, "call_model")
builder.add_conditional_edges(
"call_model",
tools_condition,
should_continue,
)
builder.add_edge("tools", "call_model")
# Compile the graph
graph = builder.compile()
math_response = await graph.ainvoke({"messages": "what's (3 + 5) x 12?"})
weather_response = await graph.ainvoke({"messages": "what is the weather in nyc?"})
# Test the graph
math_response = await graph.ainvoke(
{"messages": [{"role": "user", "content": "what's (3 + 5) x 12?"}]}
)
weather_response = await graph.ainvoke(
{"messages": [{"role": "user", "content": "what is the weather in nyc?"}]}
)
```
@@ -148,4 +175,4 @@ if __name__ == "__main__":
- [MCP documentation](https://modelcontextprotocol.io/introduction)
- [MCP Transport documentation](https://modelcontextprotocol.io/docs/concepts/transports)
- [langchain_mcp_adapters](https://github.com/langchain-ai/langchain-mcp-adapters)
- [langchain_mcp_adapters](https://github.com/langchain-ai/langchain-mcp-adapters)
+119
View File
@@ -0,0 +1,119 @@
# Egress for Subscription Metrics and Operational Metadata
> **Important: Self Hosted Only**
> This section only applies to customers who are not running in offline mode and assumes you are using a self-hosted LangGraph Platform instance.
> This does not apply to SaaS or Hybrid deployments.
Self-Hosted LangGraph Platform instances store all information locally and will never send sensitive information outside of your network. We currently only track platform usage for billing purposes according to the entitlements in your order. In order to better remotely support our customers, we do require egress to `https://beacon.langchain.com`.
In the future, we will be introducing support diagnostics to help us ensure that the LangGraph Platform is running at an optimal level within your environment.
> **Warning**
> **This will require egress to `https://beacon.langchain.com` from your network.**
> **If using an API key, you will also need to allow egress to `https://api.smith.langchain.com` or `https://eu.api.smith.langchain.com` for API key verification.**
Generally, data that we send to Beacon can be categorized as follows:
- **Subscription Metrics**
- Subscription metrics are used to determine level of access and utilization of LangSmith. This includes, but are not limited to:
- Nodes Executed
- Runs Executed
- License Key Verification
- **Operational Metadata**
- This metadata will contain and collect the above subscription metrics to assist with remote support, allowing the LangChain team to diagnose and troubleshoot performance issues more effectively and proactively.
## Example Payloads
In an effort to maximize transparency, we provide sample payloads here:
### License Verification (If using an Enterprise License)
**Endpoint:**
`POST beacon.langchain.com/v1/beacon/verify`
**Request:**
```json
{
"license": "<YOUR_LICENSE_KEY>"
}
```
**Response:**
```json
{
"token": "Valid JWT" // Short-lived JWT token to avoid repeated license checks
}
```
### Api Key Verification (If using a LangSmith API Key)
**Endpoint:**
`POST api.smith.langchain.com/auth`
**Request:**
```json
"Headers": {
X-Api-Key: <YOUR_API_KEY>
}
```
**Response:**
```json
{
"org_config": {
"org_id": "3a1c2b6f-4430-4b92-8a5b-79b8b567bbc1",
... // Additional organization details
}
}
```
### Usage Reporting
**Endpoint:**
`POST beacon.langchain.com/v1/metadata/submit`
**Request:**
```json
{
"license": "<YOUR_LICENSE_KEY>",
"from_timestamp": "2025-01-06T09:00:00Z",
"to_timestamp": "2025-01-06T10:00:00Z",
"tags": {
"langgraph.python.version": "0.1.0",
"langgraph_api.version": "0.2.0",
"langgraph.platform.revision": "abc123",
"langgraph.platform.variant": "standard",
"langgraph.platform.host": "host-1",
"langgraph.platform.tenant_id": "3a1c2b6f-4430-4b92-8a5b-79b8b567bbc1",
"langgraph.platform.project_id": "c5b5f53a-4716-4326-8967-d4f7f7799735",
"langgraph.platform.plan": "enterprise",
"user_app.uses_indexing": "true",
"user_app.uses_custom_app": "false",
"user_app.uses_custom_auth": "true",
"user_app.uses_thread_ttl": "true",
"user_app.uses_store_ttl": "false"
},
"measures": {
"langgraph.platform.runs": 150,
"langgraph.platform.nodes": 450
},
"logs": []
}
```
**Response:**
```json
"204 No Content"
```
## Our Commitment
LangChain will not store any sensitive information in the Subscription Metrics or Operational Metadata. Any data collected will not be shared with a third party. If you have any concerns about the data being sent, please reach out to your account team.
@@ -23,6 +23,8 @@ Before deploying, review the [conceptual guide for the Self-Hosted Control Plane
kubectl get storageclass
1. Egress to `https://beacon.langchain.com` from your network. This is required for license verification and usage reporting if not running in air-gapped mode. See the [Egress documentation](../../cloud/deployment/egress.md) for more details.
## Setup
1. As part of configuring your Self-Hosted LangSmith instance, you enable the `langgraphPlatform` option. This will provision a few key resources.
+3 -3
View File
@@ -108,11 +108,11 @@ from langgraph.graph import StateGraph, END, START
from my_agent.utils.nodes import call_model, should_continue, tool_node # import nodes
from my_agent.utils.state import AgentState # import state
# Define the config
class GraphConfig(TypedDict):
# Define the runtime context
class GraphContext(TypedDict):
model_name: Literal["anthropic", "openai"]
workflow = StateGraph(AgentState, config_schema=GraphConfig)
workflow = StateGraph(AgentState, context_schema=GraphContext)
workflow.add_node("agent", call_model)
workflow.add_node("action", tool_node)
workflow.add_edge(START, "agent")
@@ -121,11 +121,11 @@ from langgraph.graph import StateGraph, END, START
from my_agent.utils.nodes import call_model, should_continue, tool_node # import nodes
from my_agent.utils.state import AgentState # import state
# Define the config
class GraphConfig(TypedDict):
# Define the runtime context
class GraphContext(TypedDict):
model_name: Literal["anthropic", "openai"]
workflow = StateGraph(AgentState, config_schema=GraphConfig)
workflow = StateGraph(AgentState, context_schema=GraphContext)
workflow.add_node("agent", call_model)
workflow.add_node("action", tool_node)
workflow.add_edge(START, "agent")
@@ -24,6 +24,7 @@ Before deploying, review the [conceptual guide for the Standalone Container](../
1. `LANGSMITH_API_KEY`: (if using [Lite](../../concepts/langgraph_server.md#server-versions)) LangSmith API key. This will be used to authenticate ONCE at server start up.
1. `LANGGRAPH_CLOUD_LICENSE_KEY`: (if using [Enterprise](../../concepts/langgraph_data_plane.md#licensing)) LangGraph Platform license key. This will be used to authenticate ONCE at server start up.
1. `LANGSMITH_ENDPOINT`: To send traces to a [self-hosted LangSmith](https://docs.smith.langchain.com/self_hosting) instance, set `LANGSMITH_ENDPOINT` to the hostname of the self-hosted LangSmith instance.
1. Egress to `https://beacon.langchain.com` from your network. This is required for license verification and usage reporting if not running in air-gapped mode. See the [Egress documentation](../../cloud/deployment/egress.md) for more details.
## Kubernetes (Helm)
@@ -30,9 +30,7 @@ To review, edit, and approve tool calls in an agent or workflow, use LangGraph's
# > [
# > {
# > 'value': {'text_to_revise': 'original text'},
# > 'resumable': True,
# > 'ns': ['human_node:fc722478-2f21-0578-c572-d9fc4dd07c3b'],
# > 'when': 'during'
# > 'id': '...',
# > }
# > ]
@@ -203,9 +201,7 @@ To review, edit, and approve tool calls in an agent or workflow, use LangGraph's
# > [
# > {
# > 'value': {'text_to_revise': 'original text'},
# > 'resumable': True,
# > 'ns': ['human_node:fc722478-2f21-0578-c572-d9fc4dd07c3b'],
# > 'when': 'during'
# > 'id': '...',
# > }
# > ]
@@ -2,21 +2,20 @@
In this guide we will show how to create, configure, and manage an [assistant](../../concepts/assistants.md).
First, as a brief refresher on the concept of configurations, consider the following simple `call_model` node and configuration schema. Observe that this node tries to read and use the `model_name` as defined by the `config` object's `configurable`.
First, as a brief refresher on the concept of runtime context, consider the following simple `call_model` node and context schema. Observe that this node tries to read and use the `model_provider` as defined by the `Runtime` object's `context` property.
=== "Python"
```python
@dataclass
class ContextSchema:
llm_provider: str = "anthropic"
class ConfigSchema(TypedDict):
model_name: str
builder = StateGraph(AgentState, context_schema=ContextSchema)
builder = StateGraph(AgentState, config_schema=ConfigSchema)
def call_model(state, config):
def call_model(state, runtime: Runtime[ContextSchema]):
messages = state["messages"]
model_name = config.get('configurable', {}).get("model_name", "anthropic")
model = _get_model(model_name)
model = _get_model(runtime.context.llm_provider)
response = model.invoke(messages)
# We return a list, because this will get added to the existing list
return {"messages": [response]}
@@ -44,7 +43,7 @@ First, as a brief refresher on the concept of configurations, consider the follo
}
```
For more information on configurations, [see here](../../concepts/low_level.md#configuration).
For more information on runtime context, [see here](../../concepts/low_level.md#runtime-context).
## Create an assistant
+27 -11
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@@ -30,17 +30,33 @@ export default {
Next, define your UI components in your `langgraph.json` configuration:
```json
{
"node_version": "20",
"graphs": {
"agent": "./src/agent/index.ts:graph"
},
"ui": {
"agent": "./src/agent/ui.tsx"
}
}
```
=== "Python agent"
```json title="langgraph.json"
{
"node_version": "20",
"graphs": {
"agent": "./src/agent.py:graph"
},
"ui": {
"agent": "./src/agent/ui.tsx"
}
}
```
=== "JS agent"
```json title="langgraph.json"
{
"node_version": "20",
"graphs": {
"agent": "./src/agent/index.ts:graph"
},
"ui": {
"agent": "./src/agent/ui.tsx"
}
}
```
The `ui` section points to the UI components that will be used by graphs. By default, we recommend using the same key as the graph name, but you can split out the components however you like, see [Customise the namespace of UI components](#customise-the-namespace-of-ui-components) for more details.
+16
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@@ -140,6 +140,22 @@ https://my-server.app/my-webhook-endpoint?token=YOUR_SECRET_TOKEN
Your server should extract and validate this token before processing requests.
## Disable webhooks
As of `langgraph-api>=0.2.78`, developers can disable webhooks in the `langgraph.json` file:
```json
{
"http": {
"disable_webhooks": true
}
}
```
This feature is primarily intended for self-hosted deployments, where platform administrators or developers may prefer to disable webhooks to simplify their security posture—especially if they are not configuring firewall rules or other network controls. Disabling webhooks helps prevent untrusted payloads from being sent to internal endpoints.
For full configuration details, refer to the [configuration file reference](https://langchain-ai.github.io/langgraph/cloud/reference/cli/?h=disable_webhooks#configuration-file).
## Test webhooks
You can test your webhook using online services like:
+4 -4
View File
@@ -409,8 +409,8 @@ The LangGraph CLI requires a JSON configuration file that follows this [schema](
| Option | Default | Description |
| ---------------------------- | ------------------------- | ----------------------------------------------------------------------------------------------------------------------- |
| `--wait` | | Wait for services to start before returning. Implies --detach |
| `--base-image TEXT` | `langchain/langgraph-api` | Base image to use for the LangGraph API server. Pin to specific versions using version tags. |
| `--image TEXT` | | Docker image to use for the langgraph-api service. If specified, skips building and uses this image directly. |
| `--base-image TEXT` | `langchain/langgraph-api` | Base image to use for the LangGraph API server. Pin to specific versions using version tags. |
| `--image TEXT` | | Docker image to use for the langgraph-api service. If specified, skips building and uses this image directly. |
| `--postgres-uri TEXT` | Local database | Postgres URI to use for the database. |
| `--watch` | | Restart on file changes |
| `--debugger-base-url TEXT` | `http://127.0.0.1:[PORT]` | URL used by the debugger to access LangGraph API. |
@@ -438,8 +438,8 @@ The LangGraph CLI requires a JSON configuration file that follows this [schema](
| Option | Default | Description |
| ---------------------------------------------------------------------- | ------------------------- | ----------------------------------------------------------------------------------------------------------------------- |
| <span style="white-space: nowrap;">`--wait`</span> | | Wait for services to start before returning. Implies --detach |
| <span style="white-space: nowrap;">`--base-image TEXT`</span> | <span style="white-space: nowrap;">`langchain/langgraph-api`</span> | Base image to use for the LangGraph API server. Pin to specific versions using version tags. |
| <span style="white-space: nowrap;">`--image TEXT`</span> | | Docker image to use for the langgraph-api service. If specified, skips building and uses this image directly. |
| <span style="white-space: nowrap;">`--base-image TEXT`</span> | <span style="white-space: nowrap;">`langchain/langgraph-api`</span> | Base image to use for the LangGraph API server. Pin to specific versions using version tags. |
| <span style="white-space: nowrap;">`--image TEXT`</span> | | Docker image to use for the langgraph-api service. If specified, skips building and uses this image directly. |
| <span style="white-space: nowrap;">`--postgres-uri TEXT`</span> | Local database | Postgres URI to use for the database. |
| <span style="white-space: nowrap;">`--watch`</span> | | Restart on file changes |
| <span style="white-space: nowrap;">`-c, --config FILE`</span> | `langgraph.json` | Path to configuration file declaring dependencies, graphs and environment variables. |
+3
View File
@@ -28,6 +28,9 @@ Specify `DD_API_KEY` (your [Datadog API Key](https://docs.datadoghq.com/account_
If `DD_API_KEY` is specified, the application process is wrapped in the [`ddtrace-run` command](https://ddtrace.readthedocs.io/en/stable/installation_quickstart.html). Other `DD_*` environment variables (e.g. `DD_SITE`, `DD_ENV`, `DD_SERVICE`, `DD_TRACE_ENABLED`) are typically needed to properly configure the tracing instrumentation. See [`DD_*` environment variables](https://ddtrace.readthedocs.io/en/stable/configuration.html) for more details.
!!! note
Enabling `DD_API_KEY` (and thus `ddtrace-run`) can override or interfere with other auto-instrumentation solutions (such as OpenTelemetry) that you may have instrumented into your application code.
## `LANGCHAIN_TRACING_SAMPLING_RATE`
Sampling rate for traces sent to LangSmith. Valid values: Any float between `0` and `1`.
@@ -4,6 +4,36 @@
---
## v0.2.96 (2025-07-17)
- Added a fallback mechanism for configurable header patterns to handle exclude/include settings more effectively.
## v0.2.95 (2025-07-17)
- Avoided setting the future if it is already done to prevent redundant operations.
- Resolved compatibility errors in CI by switching from `typing.TypedDict` to `typing_extensions.TypedDict` for Python versions below 3.12.
## v0.2.94 (2025-07-16)
- Improved performance by omitting pending sends for langgraph versions 0.5 and above.
- Improved server startup logs to provide clearer warnings when the DD_API_KEY environment variable is set.
## v0.2.93 (2025-07-16)
- Removed the GIN index for run metadata to improve performance.
## v0.2.92 (2025-07-16)
- Enabled copying functionality for blobs and checkpoints, improving data management flexibility.
## v0.2.91 (2025-07-16)
- Reduced writes to the `checkpoint_blobs` table by inlining small values (null, numeric, str, etc.). This means we don't need to store extra values for channels that haven't been updated.
## v0.2.90 (2025-07-16)
- Improve checkpoint writes via node-local background queueing.
## v0.2.89 (2025-07-15)
- Decoupled checkpoint writing from thread/run state by removing foreign keys and updated logger to prevent timeout-related failures.
## v0.2.88 (2025-07-14)
- Removed the foreign key constraint for `thread` in the `run` table to simplify database schema.
## v0.2.87 (2025-07-14)
- Added more detailed logs for Redis worker signaling to improve debugging.
+4 -4
View File
@@ -1,6 +1,6 @@
# Assistants
**Assistants** allow you to manage configurations (like prompts, LLM selection, tools) separately from your graph's core logic, enabling rapid changes that don't alter the graph architecture. It is a way to create multiple specialized versions of the same graph architecture, each optimized for different use cases through configuration variations rather than structural changes.
**Assistants** allow you to manage configurations (like prompts, LLM selection, tools) separately from your graph's core logic, enabling rapid changes that don't alter the graph architecture. It is a way to create multiple specialized versions of the same graph architecture, each optimized for different use cases through context/configuration variations rather than structural changes.
For example, imagine a general-purpose writing agent built on a common graph architecture. While the structure remains the same, different writing styles—such as blog posts and tweets—require tailored configurations to optimize performance. To support these variations, you can create multiple assistants (e.g., one for blogs and another for tweets) that share the underlying graph but differ in model selection and system prompt.
@@ -14,8 +14,8 @@ The LangGraph Cloud API provides several endpoints for creating and managing ass
## Configuration
Assistants build on the LangGraph open source concept of [configuration](low_level.md#configuration).
While configuration is available in the open source LangGraph library, assistants are only present in [LangGraph Platform](langgraph_platform.md). This is due to the fact that assistants are tightly coupled to your deployed graph. Upon deployment, LangGraph Server will automatically create a default assistant for each graph using the graph's default configuration settings.
Assistants build on the LangGraph open source concepts of configuration and [runtime context](low_level.md#runtime-context).
While these features are available in the open source LangGraph library, assistants are only present in [LangGraph Platform](langgraph_platform.md). This is due to the fact that assistants are tightly coupled to your deployed graph. Upon deployment, LangGraph Server will automatically create a default assistant for each graph using the graph's default context and configuration settings.
In practice, an assistant is just an _instance_ of a graph with a specific configuration. Therefore, multiple assistants can reference the same graph but can contain different configurations (e.g. prompts, models, tools). The LangGraph Server API provides several endpoints for creating and managing assistants. See the [API reference](../cloud/reference/api/api_ref.html) and [this how-to](../cloud/how-tos/configuration_cloud.md) for more details on how to create assistants.
@@ -26,6 +26,6 @@ Once you've created an assistant, subsequent edits to that assistant will create
## Execution
A **run** is an invocation of an assistant. Each run may have its own input, configuration, and metadata, which may affect execution and output of the underlying graph. A run can optionally be executed on a [thread](./persistence.md#threads).
A **run** is an invocation of an assistant. Each run may have its own input, configuration, context, and metadata, which may affect execution and output of the underlying graph. A run can optionally be executed on a [thread](./persistence.md#threads).
The LangGraph Platform API provides several endpoints for creating and managing runs. See the [API reference](../cloud/reference/api/api_ref.html#tag/thread-runs/) for more details.
+1 -1
View File
@@ -10,7 +10,7 @@ search:
There are two free options for deploying LangGraph applications via the LangGraph Server:
1. [Local](../tutorials/langgraph-platform/local-server.md): Deploy for local testing and development.
1. [Standalone Container (Lite)](../concepts/langgraph_standalone_container.md): A limited version of Standalone Container for deployments unlikely to see more that 1 million node executions per year and that do not need crons and other enterprise features. Standalone Container (Lite) deployment option is free with a LangSmith API key.
1. [Standalone Container (Lite)](../concepts/langgraph_standalone_container.md): A limited version of Standalone Container for deployments unlikely to see more than 1 million node executions per year and that do not need crons and other enterprise features. Standalone Container (Lite) deployment option is free with a LangSmith API key.
## Production deployment
+4 -4
View File
@@ -48,7 +48,7 @@ If a [node](./low_level.md#nodes) contains multiple operations, you may find it
from typing_extensions import TypedDict
import uuid
from langgraph.checkpoint.memory import MemorySaver
from langgraph.checkpoint.memory import InMemorySaver
from langgraph.graph import StateGraph, START, END
import requests
@@ -74,7 +74,7 @@ If a [node](./low_level.md#nodes) contains multiple operations, you may find it
builder.add_edge("call_api", END)
# Specify a checkpointer
checkpointer = MemorySaver()
checkpointer = InMemorySaver()
# Compile the graph with the checkpointer
graph = builder.compile(checkpointer=checkpointer)
@@ -94,7 +94,7 @@ If a [node](./low_level.md#nodes) contains multiple operations, you may find it
from typing_extensions import TypedDict
import uuid
from langgraph.checkpoint.memory import MemorySaver
from langgraph.checkpoint.memory import InMemorySaver
from langgraph.func import task
from langgraph.graph import StateGraph, START, END
import requests
@@ -129,7 +129,7 @@ If a [node](./low_level.md#nodes) contains multiple operations, you may find it
builder.add_edge("call_api", END)
# Specify a checkpointer
checkpointer = MemorySaver()
checkpointer = InMemorySaver()
# Compile the graph with the checkpointer
graph = builder.compile(checkpointer=checkpointer)
+33 -30
View File
@@ -39,7 +39,7 @@ Here are some key differences:
Below we demonstrate a simple application that writes an essay and [interrupts](human_in_the_loop.md) to request human review.
```python
from langgraph.checkpoint.memory import MemorySaver
from langgraph.checkpoint.memory import InMemorySaver
from langgraph.func import entrypoint, task
from langgraph.types import interrupt
@@ -50,7 +50,7 @@ def write_essay(topic: str) -> str:
time.sleep(1) # A placeholder for a long-running task.
return f"An essay about topic: {topic}"
@entrypoint(checkpointer=MemorySaver())
@entrypoint(checkpointer=InMemorySaver())
def workflow(topic: str) -> dict:
"""A simple workflow that writes an essay and asks for a review."""
essay = write_essay("cat").result()
@@ -79,51 +79,54 @@ def workflow(topic: str) -> dict:
```python
import time
import uuid
from langgraph.func import entrypoint, task
from langgraph.types import interrupt
from langgraph.checkpoint.memory import MemorySaver
from langgraph.checkpoint.memory import InMemorySaver
@task
def write_essay(topic: str) -> str:
"""Write an essay about the given topic."""
time.sleep(1) # This is a placeholder for a long-running task.
time.sleep(1) # This is a placeholder for a long-running task.
return f"An essay about topic: {topic}"
@entrypoint(checkpointer=MemorySaver())
@entrypoint(checkpointer=InMemorySaver())
def workflow(topic: str) -> dict:
"""A simple workflow that writes an essay and asks for a review."""
essay = write_essay("cat").result()
is_approved = interrupt({
# Any json-serializable payload provided to interrupt as argument.
# It will be surfaced on the client side as an Interrupt when streaming data
# from the workflow.
"essay": essay, # The essay we want reviewed.
# We can add any additional information that we need.
# For example, introduce a key called "action" with some instructions.
"action": "Please approve/reject the essay",
})
is_approved = interrupt(
{
# Any json-serializable payload provided to interrupt as argument.
# It will be surfaced on the client side as an Interrupt when streaming data
# from the workflow.
"essay": essay, # The essay we want reviewed.
# We can add any additional information that we need.
# For example, introduce a key called "action" with some instructions.
"action": "Please approve/reject the essay",
}
)
return {
"essay": essay, # The essay that was generated
"is_approved": is_approved, # Response from HIL
"essay": essay, # The essay that was generated
"is_approved": is_approved, # Response from HIL
}
thread_id = str(uuid.uuid4())
config = {
"configurable": {
"thread_id": thread_id
}
}
config = {"configurable": {"thread_id": thread_id}}
for item in workflow.stream("cat", config):
print(item)
```
```pycon
{'write_essay': 'An essay about topic: cat'}
{'__interrupt__': (Interrupt(value={'essay': 'An essay about topic: cat', 'action': 'Please approve/reject the essay'}, resumable=True, ns=['workflow:f7b8508b-21c0-8b4c-5958-4e8de74d2684'], when='during'),)}
# > {'write_essay': 'An essay about topic: cat'}
# > {
# > '__interrupt__': (
# > Interrupt(
# > value={
# > 'essay': 'An essay about topic: cat',
# > 'action': 'Please approve/reject the essay'
# > },
# > id='b9b2b9d788f482663ced6dc755c9e981'
# > ),
# > )
# > }
```
An essay has been written and is ready for review. Once the review is provided, we can resume the workflow:
+40 -28
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@@ -45,7 +45,7 @@ The first thing you do when you define a graph is define the `State` of the grap
### Schema
The main documented way to specify the schema of a graph is by using `TypedDict`. However, we also support [using a Pydantic BaseModel](../how-tos/graph-api.md#use-pydantic-models-for-graph-state) as your graph state to add **default values** and additional data validation.
The main documented way to specify the schema of a graph is by using a [`TypedDict`](https://docs.python.org/3/library/typing.html#typing.TypedDict). If you want to provide default values in your state, use a [`dataclass`](https://docs.python.org/3/library/dataclasses.html). We also support using a Pydantic [BaseModel](../how-tos/graph-api.md#use-pydantic-models-for-graph-state) as your graph state if you want recursive data validation (though note that pydantic is less performant than a `TypedDict` or `dataclass`).
By default, the graph will have the same input and output schemas. If you want to change this, you can also specify explicit input and output schemas directly. This is useful when you have a lot of keys, and some are explicitly for input and others for output. See the [guide here](../how-tos/graph-api.md#define-input-and-output-schemas) for how to use.
@@ -192,35 +192,48 @@ class State(MessagesState):
## Nodes
In LangGraph, nodes are typically python functions (sync or async) where the **first** positional argument is the [state](#state), and (optionally), the **second** positional argument is a "config", containing optional [configurable parameters](#configuration) (such as a `thread_id`).
In LangGraph, nodes are Python functions (either synchronous or asynchronous) that accept the following arguments:
1. `state`: The [state](#state) of the graph
2. `config`: A `RunnableConfig` object that contains configuration information like `thread_id` and tracing information like `tags`
3. `runtime`: A `Runtime` object that contains [runtime `context`](#runtime-context) and other information like `store` and `stream_writer`
Similar to `NetworkX`, you add these nodes to a graph using the [add_node][langgraph.graph.StateGraph.add_node] method:
```python
from dataclasses import dataclass
from typing_extensions import TypedDict
from langchain_core.runnables import RunnableConfig
from langgraph.graph import StateGraph
from langgraph.runtime import Runtime
class State(TypedDict):
input: str
results: str
@dataclass
class Context:
user_id: str
builder = StateGraph(State)
def plain_node(state: State):
return state
def my_node(state: State, config: RunnableConfig):
print("In node: ", config["configurable"]["user_id"])
def node_with_runtime(state: State, runtime: Runtime[Context]):
print("In node: ", runtime.context.user_id)
return {"results": f"Hello, {state['input']}!"}
def node_with_config(state: State, config: RunnableConfig):
print("In node with thread_id: ", config["configurable"]["thread_id"])
return {"results": f"Hello, {state['input']}!"}
# The second argument is optional
def my_other_node(state: State):
return state
builder.add_node("my_node", my_node)
builder.add_node("other_node", my_other_node)
builder.add_node("plain_node", plain_node)
builder.add_node("node_with_runtime", node_with_runtime)
builder.add_node("node_with_config", node_with_config)
...
```
@@ -298,7 +311,7 @@ print(graph.invoke({"x": 5}, stream_mode='updates')) # (2)!
[{'expensive_node': {'result': 10}, '__metadata__': {'cached': True}}]
```
1. First run takes the full second to run (due to mocked expensive computation).
1. First run takes two seconds to run (due to mocked expensive computation).
2. Second run utilizes cache and returns quickly.
## Edges
@@ -459,33 +472,32 @@ LangGraph can easily handle migrations of graph definitions (nodes, edges, and s
- State keys that are renamed lose their saved state in existing threads
- State keys whose types change in incompatible ways could currently cause issues in threads with state from before the change -- if this is a blocker please reach out and we can prioritize a solution.
## Configuration
## Runtime Context
When creating a graph, you can also mark that certain parts of the graph are configurable. This is commonly done to enable easily switching between models or system prompts. This allows you to create a single "cognitive architecture" (the graph) but have multiple different instance of it.
You can optionally specify a `config_schema` when creating a graph.
When creating a graph, you can specify a `context_schema` for runtime context passed to nodes. This is useful for passing
information to nodes that is not part of the graph state. For example, you might want to pass dependencies such as model name or a database connection.
```python
class ConfigSchema(TypedDict):
llm: str
@dataclass
class ContextSchema:
llm_provider: str = "openai"
graph = StateGraph(State, config_schema=ConfigSchema)
graph = StateGraph(State, context_schema=ContextSchema)
```
You can then pass this configuration into the graph using the `configurable` config field.
You can then pass this context into the graph using the `context` parameter of the `invoke` method.
```python
config = {"configurable": {"llm": "anthropic"}}
graph.invoke(inputs, config=config)
graph.invoke(inputs, context={"llm_provider": "anthropic"})
```
You can then access and use this configuration inside a node or conditional edge:
You can then access and use this context inside a node or conditional edge:
```python
def node_a(state, config):
llm_type = config.get("configurable", {}).get("llm", "openai")
llm = get_llm(llm_type)
from langgraph.runtime import Runtime
def node_a(state: State, runtime: Runtime[ContextSchema]):
llm = get_llm(runtime.context.llm_provider)
...
```
@@ -496,7 +508,7 @@ See [this guide](../how-tos/graph-api.md#add-runtime-configuration) for a full b
The recursion limit sets the maximum number of [super-steps](#graphs) the graph can execute during a single execution. Once the limit is reached, LangGraph will raise `GraphRecursionError`. By default this value is set to 25 steps. The recursion limit can be set on any graph at runtime, and is passed to `.invoke`/`.stream` via the config dictionary. Importantly, `recursion_limit` is a standalone `config` key and should not be passed inside the `configurable` key as all other user-defined configuration. See the example below:
```python
graph.invoke(inputs, config={"recursion_limit": 5, "configurable":{"llm": "anthropic"}})
graph.invoke(inputs, config={"recursion_limit": 5}, context={"llm": "anthropic"})
```
Read [this how-to](https://langchain-ai.github.io/langgraph/how-tos/recursion-limit/) to learn more about how the recursion limit works.
+2 -2
View File
@@ -487,12 +487,12 @@ If you want to fallback to pickle for objects not currently supported by our msg
you can use the `pickle_fallback` argument of the `JsonPlusSerializer`:
```python
from langgraph.checkpoint.memory import MemorySaver
from langgraph.checkpoint.memory import InMemorySaver
from langgraph.checkpoint.serde.jsonplus import JsonPlusSerializer
# ... Define the graph ...
graph.compile(
checkpointer=MemorySaver(serde=JsonPlusSerializer(pickle_fallback=True))
checkpointer=InMemorySaver(serde=JsonPlusSerializer(pickle_fallback=True))
)
```
+17
View File
@@ -0,0 +1,17 @@
# Tracing
Traces are a series of steps that your application takes to go from input to output. Each of these individual steps is represented by a run. You can use [LangSmith](https://smith.langchain.com/) to visualize these execution steps. To use it, [enable tracing for your application](../how-tos/enable-tracing.md). This enables you to do the following:
- [Debug a locally running application](../cloud/how-tos/clone_traces_studio.md).
- [Evaluate the application performance](../agents/evals.md).
- [Monitor the application](https://docs.smith.langchain.com/observability/how_to_guides/dashboards).
To get started, sign up for a free account at [LangSmith](https://smith.langchain.com/).
## Learn more
- [Graph runs in LangSmith](../how-tos/run-id-langsmith.md)
- [LangSmith Observability quickstart](https://docs.smith.langchain.com/observability)
- [Trace with LangGraph](https://docs.smith.langchain.com/observability/how_to_guides/trace_with_langgraph)
- [Tracing conceptual guide](https://docs.smith.langchain.com/observability/concepts#traces)
+5
View File
@@ -2,6 +2,11 @@
The pages in this section provide a conceptual overview and how-tos for the following topics:
## Agent development
- [Overview](../agents/overview.md): Use prebuilt components to build an agent.
- [Run an agent](../agents/run_agents.md): Run an agent by providing input, interpreting output, enabling streaming, and controlling execution limits.
## LangGraph APIs
- [Graph API](../concepts/low_level.md): Use the Graph API to define workflows using a graph paradigm.
@@ -77,7 +77,7 @@
"metadata": {},
"outputs": [
{
"name": "stdin",
"name": "stdout",
"output_type": "stream",
"text": [
"OPENAI_API_KEY: ········\n"
@@ -165,7 +165,7 @@
},
{
"cell_type": "code",
"execution_count": 8,
"execution_count": null,
"id": "d129e4e1-3766-429a-b806-cde3d8bc0469",
"metadata": {},
"outputs": [],
@@ -173,7 +173,7 @@
"from langchain_core.messages import convert_to_openai_messages, BaseMessage\n",
"from langgraph.func import entrypoint, task\n",
"from langgraph.graph import add_messages\n",
"from langgraph.checkpoint.memory import MemorySaver\n",
"from langgraph.checkpoint.memory import InMemorySaver\n",
"\n",
"\n",
"@task\n",
@@ -192,7 +192,7 @@
"\n",
"\n",
"# add short-term memory for storing conversation history\n",
"checkpointer = MemorySaver()\n",
"checkpointer = InMemorySaver()\n",
"\n",
"\n",
"@entrypoint(checkpointer=checkpointer)\n",
@@ -222,12 +222,12 @@
"name": "stdout",
"output_type": "stream",
"text": [
"\u001B[33muser_proxy\u001B[0m (to assistant):\n",
"\u001b[33muser_proxy\u001b[0m (to assistant):\n",
"\n",
"Find numbers between 10 and 30 in fibonacci sequence\n",
"\n",
"--------------------------------------------------------------------------------\n",
"\u001B[33massistant\u001B[0m (to user_proxy):\n",
"\u001b[33massistant\u001b[0m (to user_proxy):\n",
"\n",
"To find numbers between 10 and 30 in the Fibonacci sequence, we can generate the Fibonacci sequence and check which numbers fall within this range. Here's a plan:\n",
"\n",
@@ -253,9 +253,9 @@
"This script will print the Fibonacci numbers between 10 and 30. Please execute the code to see the result.\n",
"\n",
"--------------------------------------------------------------------------------\n",
"\u001B[31m\n",
">>>>>>>> EXECUTING CODE BLOCK 0 (inferred language is python)...\u001B[0m\n",
"\u001B[33muser_proxy\u001B[0m (to assistant):\n",
"\u001b[31m\n",
">>>>>>>> EXECUTING CODE BLOCK 0 (inferred language is python)...\u001b[0m\n",
"\u001b[33muser_proxy\u001b[0m (to assistant):\n",
"\n",
"exitcode: 0 (execution succeeded)\n",
"Code output: \n",
@@ -264,7 +264,7 @@
"\n",
"\n",
"--------------------------------------------------------------------------------\n",
"\u001B[33massistant\u001B[0m (to user_proxy):\n",
"\u001b[33massistant\u001b[0m (to user_proxy):\n",
"\n",
"The Fibonacci numbers between 10 and 30 are 13 and 21. \n",
"\n",
@@ -318,7 +318,7 @@
"name": "stdout",
"output_type": "stream",
"text": [
"\u001B[33muser_proxy\u001B[0m (to assistant):\n",
"\u001b[33muser_proxy\u001b[0m (to assistant):\n",
"\n",
"Multiply the last number by 3\n",
"Context: \n",
@@ -334,7 +334,7 @@
"TERMINATE\n",
"\n",
"--------------------------------------------------------------------------------\n",
"\u001B[33massistant\u001B[0m (to user_proxy):\n",
"\u001b[33massistant\u001b[0m (to user_proxy):\n",
"\n",
"The last number in the Fibonacci sequence between 10 and 30 is 21. Multiplying 21 by 3 gives:\n",
"\n",
+5 -5
View File
@@ -75,7 +75,7 @@ We will now create a LangGraph chatbot graph that calls AutoGen agent.
```python
from langchain_core.messages import convert_to_openai_messages
from langgraph.graph import StateGraph, MessagesState, START
from langgraph.checkpoint.memory import MemorySaver
from langgraph.checkpoint.memory import InMemorySaver
def call_autogen_agent(state: MessagesState):
# Convert LangGraph messages to OpenAI format for AutoGen
@@ -101,7 +101,7 @@ def call_autogen_agent(state: MessagesState):
return {"messages": {"role": "assistant", "content": final_content}}
# Create the graph with memory for persistence
checkpointer = MemorySaver()
checkpointer = InMemorySaver()
# Build the graph
builder = StateGraph(MessagesState)
@@ -228,7 +228,7 @@ my-autogen-agent/
import autogen
from langchain_core.messages import convert_to_openai_messages
from langgraph.graph import StateGraph, MessagesState, START
from langgraph.checkpoint.memory import MemorySaver
from langgraph.checkpoint.memory import InMemorySaver
# AutoGen configuration
config_list = [{"model": "gpt-4o", "api_key": os.environ["OPENAI_API_KEY"]}]
@@ -276,7 +276,7 @@ my-autogen-agent/
# Create and compile the graph
def create_graph():
checkpointer = MemorySaver()
checkpointer = InMemorySaver()
builder = StateGraph(MessagesState)
builder.add_node("autogen", call_autogen_agent)
builder.add_edge(START, "autogen")
@@ -290,7 +290,7 @@ my-autogen-agent/
```
langgraph>=0.1.0
pyautogen>=0.2.0
ag2>=0.2.0
langchain-core>=0.1.0
langchain-openai>=0.0.5
```
@@ -167,7 +167,7 @@
"from langchain_core.messages import BaseMessage\n",
"from langgraph.func import entrypoint, task\n",
"from langgraph.graph import add_messages\n",
"from langgraph.checkpoint.memory import MemorySaver\n",
"from langgraph.checkpoint.memory import InMemorySaver\n",
"from langgraph.store.base import BaseStore\n",
"\n",
"\n",
@@ -192,7 +192,7 @@
"\n",
"\n",
"# NOTE: we're passing the store object here when creating a workflow via entrypoint()\n",
"@entrypoint(checkpointer=MemorySaver(), store=in_memory_store)\n",
"@entrypoint(checkpointer=InMemorySaver(), store=in_memory_store)\n",
"def workflow(\n",
" inputs: list[BaseMessage],\n",
" *,\n",
+16
View File
@@ -0,0 +1,16 @@
# Enable tracing for your application
To enable [tracing](../concepts/tracing.md) for your application, set the following environment variables:
```python
export LANGSMITH_TRACING=true
export LANGSMITH_API_KEY=<your-api-key>
```
For more information, see [Trace with LangGraph](https://docs.smith.langchain.com/observability/how_to_guides/trace_with_langgraph).
## Learn more
- [Graph runs in LangSmith](../how-tos/run-id-langsmith.md)
- [LangSmith Observability quickstart](https://docs.smith.langchain.com/observability)
- [Tracing conceptual guide](https://docs.smith.langchain.com/observability/concepts#traces)
+38 -36
View File
@@ -328,14 +328,15 @@ Output of graph invocation: {'a': 'set by node_3'}
A [StateGraph](https://langchain-ai.github.io/langgraph/reference/graphs.md#langgraph.graph.StateGraph) accepts a `state_schema` argument on initialization that specifies the "shape" of the state that the nodes in the graph can access and update.
In our examples, we typically use a python-native `TypedDict` for `state_schema`, but `state_schema` can be any [type](https://docs.python.org/3/library/stdtypes.html#type-objects).
In our examples, we typically use a python-native `TypedDict` or [`dataclass`](https://docs.python.org/3/library/dataclasses.html) for `state_schema`, but `state_schema` can be any [type](https://docs.python.org/3/library/stdtypes.html#type-objects).
Here, we'll see how a [Pydantic BaseModel](https://docs.pydantic.dev/latest/api/base_model/). can be used for `state_schema` to add run time validation on **inputs**.
Here, we'll see how a [Pydantic BaseModel](https://docs.pydantic.dev/latest/api/base_model/) can be used for `state_schema` to add run-time validation on **inputs**.
!!! note "Known Limitations"
- Currently, the output of the graph will **NOT** be an instance of a pydantic model.
- Run-time validation only occurs on inputs into nodes, not on the outputs.
- The validation error trace from pydantic does not show which node the error arises in.
- Pydantic's recursive validation can be slow. For performance-sensitive applications, you may want to consider using a `dataclass` instead.
```python
from langgraph.graph import StateGraph, START, END
@@ -513,12 +514,12 @@ To add runtime configuration:
See below for a simple example:
```python
from langchain_core.runnables import RunnableConfig
from langgraph.graph import END, StateGraph, START
from langgraph.runtime import Runtime
from typing_extensions import TypedDict
# 1. Specify config schema
class ConfigSchema(TypedDict):
class ContextSchema(TypedDict):
my_runtime_value: str
# 2. Define a graph that accesses the config in a node
@@ -526,18 +527,18 @@ class State(TypedDict):
my_state_value: str
# highlight-next-line
def node(state: State, config: RunnableConfig):
def node(state: State, runtime: Runtime[ContextSchema]):
# highlight-next-line
if config["configurable"]["my_runtime_value"] == "a":
if runtime.context["my_runtime_value"] == "a":
return {"my_state_value": 1}
# highlight-next-line
elif config["configurable"]["my_runtime_value"] == "b":
elif runtime.context["my_runtime_value"] == "b":
return {"my_state_value": 2}
else:
raise ValueError("Unknown values.")
# highlight-next-line
builder = StateGraph(State, config_schema=ConfigSchema)
builder = StateGraph(State, context_schema=ContextSchema)
builder.add_node(node)
builder.add_edge(START, "node")
builder.add_edge("node", END)
@@ -546,9 +547,9 @@ graph = builder.compile()
# 3. Pass in configuration at runtime:
# highlight-next-line
print(graph.invoke({}, {"configurable": {"my_runtime_value": "a"}}))
print(graph.invoke({}, context={"my_runtime_value": "a"}))
# highlight-next-line
print(graph.invoke({}, {"configurable": {"my_runtime_value": "b"}}))
print(graph.invoke({}, context={"my_runtime_value": "b"}))
```
```
{'my_state_value': 1}
@@ -559,27 +560,28 @@ print(graph.invoke({}, {"configurable": {"my_runtime_value": "b"}}))
Below we demonstrate a practical example in which we configure what LLM to use at runtime. We will use both OpenAI and Anthropic models.
```python
from dataclasses import dataclass
from langchain.chat_models import init_chat_model
from langchain_core.runnables import RunnableConfig
from langgraph.graph import MessagesState
from langgraph.graph import END, StateGraph, START
from langgraph.graph import MessagesState, END, StateGraph, START
from langgraph.runtime import Runtime
from typing_extensions import TypedDict
class ConfigSchema(TypedDict):
model: str
@dataclass
class ContextSchema:
model_provider: str = "anthropic"
MODELS = {
"anthropic": init_chat_model("anthropic:claude-3-5-haiku-latest"),
"openai": init_chat_model("openai:gpt-4.1-mini"),
}
def call_model(state: MessagesState, config: RunnableConfig):
model = config["configurable"].get("model", "anthropic")
model = MODELS[model]
def call_model(state: MessagesState, runtime: Runtime[ContextSchema]):
model = MODELS[runtime.context.model_provider]
response = model.invoke(state["messages"])
return {"messages": [response]}
builder = StateGraph(MessagesState, config_schema=ConfigSchema)
builder = StateGraph(MessagesState, context_schema=ContextSchema)
builder.add_node("model", call_model)
builder.add_edge(START, "model")
builder.add_edge("model", END)
@@ -591,8 +593,7 @@ print(graph.invoke({}, {"configurable": {"my_runtime_value": "b"}}))
# With no configuration, uses default (Anthropic)
response_1 = graph.invoke({"messages": [input_message]})["messages"][-1]
# Or, can set OpenAI
config = {"configurable": {"model": "openai"}}
response_2 = graph.invoke({"messages": [input_message]}, config=config)["messages"][-1]
response_2 = graph.invoke({"messages": [input_message]}, context={"model_provider": "openai"})["messages"][-1]
print(response_1.response_metadata["model_name"])
print(response_2.response_metadata["model_name"])
@@ -606,32 +607,33 @@ print(graph.invoke({}, {"configurable": {"my_runtime_value": "b"}}))
Below we demonstrate a practical example in which we configure two parameters: the LLM and system message to use at runtime.
```python
from dataclasses import dataclass
from typing import Optional
from langchain.chat_models import init_chat_model
from langchain_core.messages import SystemMessage
from langchain_core.runnables import RunnableConfig
from langgraph.graph import END, MessagesState, StateGraph, START
from langgraph.runtime import Runtime
from typing_extensions import TypedDict
class ConfigSchema(TypedDict):
model: Optional[str]
system_message: Optional[str]
@dataclass
class ContextSchema:
model_provider: str = "anthropic"
system_message: str | None = None
MODELS = {
"anthropic": init_chat_model("anthropic:claude-3-5-haiku-latest"),
"openai": init_chat_model("openai:gpt-4.1-mini"),
}
def call_model(state: MessagesState, config: RunnableConfig):
model = config["configurable"].get("model", "anthropic")
model = MODELS[model]
def call_model(state: MessagesState, runtime: Runtime[ContextSchema]):
model = MODELS[runtime.context.model_provider]
messages = state["messages"]
if system_message := config["configurable"].get("system_message"):
if (system_message := runtime.context.system_message):
messages = [SystemMessage(system_message)] + messages
response = model.invoke(messages)
return {"messages": [response]}
builder = StateGraph(MessagesState, config_schema=ConfigSchema)
builder = StateGraph(MessagesState, context_schema=ContextSchema)
builder.add_node("model", call_model)
builder.add_edge(START, "model")
builder.add_edge("model", END)
@@ -640,8 +642,7 @@ print(graph.invoke({}, {"configurable": {"my_runtime_value": "b"}}))
# Usage
input_message = {"role": "user", "content": "hi"}
config = {"configurable": {"model": "openai", "system_message": "Respond in Italian."}}
response = graph.invoke({"messages": [input_message]}, config)
response = graph.invoke({"messages": [input_message]}, context={"model_provider": "openai", "system_message": "Respond in Italian."})
for message in response["messages"]:
message.pretty_print()
```
@@ -1151,12 +1152,13 @@ LangGraph supports map-reduce and other advanced branching patterns using the Se
```python
from langgraph.graph import StateGraph, START, END
from langgraph.types import Send
from typing_extensions import TypedDict
from typing_extensions import TypedDict, Annotated
import operator
class OverallState(TypedDict):
topic: str
subjects: list[str]
jokes: list[str]
jokes: Annotated[list[str], operator.add]
best_selected_joke: str
def generate_topics(state: OverallState):
@@ -1565,9 +1567,9 @@ class State(TypedDict):
def node_a(state: State) -> Command[Literal["node_b", "node_c"]]:
print("Called A")
value = random.choice(["a", "b"])
value = random.choice(["b", "c"])
# this is a replacement for a conditional edge function
if value == "a":
if value == "b":
goto = "node_b"
else:
goto = "node_c"
@@ -54,13 +54,7 @@ graph = graph_builder.compile(checkpointer=checkpointer) # (4)!
config = {"configurable": {"thread_id": "some_id"}}
result = graph.invoke({"some_text": "original text"}, config=config) # (5)!
print(result['__interrupt__']) # (6)!
# > [
# > Interrupt(
# > value={'text_to_revise': 'original text'},
# > resumable=True,
# > ns=['human_node:6ce9e64f-edef-fe5d-f7dc-511fa9526960']
# > )
# > ]
# > [Interrupt(value={'text_to_revise': 'original text'}, id='a0d9dd40440ac7be2720dc5c20858627')]
# highlight-next-line
print(graph.invoke(Command(resume="Edited text"), config=config)) # (7)!
@@ -80,25 +74,27 @@ print(graph.invoke(Command(resume="Edited text"), config=config)) # (7)!
```python
from typing import TypedDict
import uuid
from langgraph.checkpoint.memory import InMemorySaver
from langgraph.constants import START
from langgraph.graph import StateGraph
# highlight-next-line
from langgraph.types import interrupt, Command
class State(TypedDict):
some_text: str
def human_node(state: State):
# highlight-next-line
value = interrupt( # (1)!
value = interrupt( # (1)!
{
"text_to_revise": state["some_text"] # (2)!
"text_to_revise": state["some_text"] # (2)!
}
)
return {
"some_text": value # (3)!
"some_text": value # (3)!
}
@@ -106,25 +102,15 @@ print(graph.invoke(Command(resume="Edited text"), config=config)) # (7)!
graph_builder = StateGraph(State)
graph_builder.add_node("human_node", human_node)
graph_builder.add_edge(START, "human_node")
checkpointer = InMemorySaver() # (4)!
checkpointer = InMemorySaver() # (4)!
graph = graph_builder.compile(checkpointer=checkpointer)
# Pass a thread ID to the graph to run it.
config = {"configurable": {"thread_id": uuid.uuid4()}}
# Run the graph until the interrupt is hit.
result = graph.invoke({"some_text": "original text"}, config=config) # (5)!
result = graph.invoke({"some_text": "original text"}, config=config) # (5)!
print(result['__interrupt__']) # (6)!
# > [
# > Interrupt(
# > value={'text_to_revise': 'original text'},
# > resumable=True,
# > ns=['human_node:6ce9e64f-edef-fe5d-f7dc-511fa9526960']
# > )
# > ]
print(result["__interrupt__"]) # (6)!
# > [Interrupt(value={'text_to_revise': 'original text'}, id='6d7c4048049254c83195429a3659661d')]
# highlight-next-line
print(graph.invoke(Command(resume="Edited text"), config=config)) # (7)!
@@ -167,7 +153,7 @@ For example, once your graph has been interrupted (multiple times, theoretically
```python
resume_map = {
i.interrupt_id: f"human input for prompt {i.value}"
i.id: f"human input for prompt {i.value}"
for i in parent.get_state(thread_config).interrupts
}
@@ -226,7 +212,7 @@ graph.invoke(Command(resume=True), config=thread_config)
from langgraph.constants import START, END
from langgraph.graph import StateGraph
from langgraph.types import interrupt, Command
from langgraph.checkpoint.memory import MemorySaver
from langgraph.checkpoint.memory import InMemorySaver
# Define the shared graph state
class State(TypedDict):
@@ -271,7 +257,7 @@ graph.invoke(Command(resume=True), config=thread_config)
builder.add_edge("approved_path", END)
builder.add_edge("rejected_path", END)
checkpointer = MemorySaver()
checkpointer = InMemorySaver()
graph = builder.compile(checkpointer=checkpointer)
# Run until interrupt
@@ -339,7 +325,7 @@ graph.invoke(
from langgraph.constants import START, END
from langgraph.graph import StateGraph
from langgraph.types import interrupt, Command
from langgraph.checkpoint.memory import MemorySaver
from langgraph.checkpoint.memory import InMemorySaver
# Define the graph state
class State(TypedDict):
@@ -378,7 +364,7 @@ graph.invoke(
builder.add_edge("downstream_use", END)
# Set up in-memory checkpointing for interrupt support
checkpointer = MemorySaver()
checkpointer = InMemorySaver()
graph = builder.compile(checkpointer=checkpointer)
# Invoke the graph until it hits the interrupt
@@ -388,14 +374,15 @@ graph.invoke(
# Output interrupt payload
print(result["__interrupt__"])
# Example output:
# Interrupt(
# value={
# 'task': 'Please review and edit the generated summary if necessary.',
# 'generated_summary': 'The cat sat on the mat and looked at the stars.'
# },
# resumable=True,
# ...
# )
# > [
# > Interrupt(
# > value={
# > 'task': 'Please review and edit the generated summary if necessary.',
# > 'generated_summary': 'The cat sat on the mat and looked at the stars.'
# > },
# > id='...'
# > )
# > ]
# Resume the graph with human-edited input
edited_summary = "The cat lay on the rug, gazing peacefully at the night sky."
@@ -655,7 +642,7 @@ def human_node(state: State):
from langgraph.constants import START, END
from langgraph.graph import StateGraph
from langgraph.types import interrupt, Command
from langgraph.checkpoint.memory import MemorySaver
from langgraph.checkpoint.memory import InMemorySaver
# Define graph state
class State(TypedDict):
@@ -694,7 +681,7 @@ def human_node(state: State):
builder.add_edge("report_age", END)
# Create the graph with a memory checkpointer
checkpointer = MemorySaver()
checkpointer = InMemorySaver()
graph = builder.compile(checkpointer=checkpointer)
# Run the graph until the first interrupt
@@ -951,7 +938,7 @@ def node_in_parent_graph(state: State):
from langgraph.graph import StateGraph
from langgraph.constants import START
from langgraph.types import interrupt, Command
from langgraph.checkpoint.memory import MemorySaver
from langgraph.checkpoint.memory import InMemorySaver
class State(TypedDict):
@@ -977,7 +964,7 @@ def node_in_parent_graph(state: State):
print(f"Got an answer of {answer}")
checkpointer = MemorySaver()
checkpointer = InMemorySaver()
subgraph_builder = StateGraph(State)
subgraph_builder.add_node("some_node", node_in_subgraph)
@@ -1008,7 +995,7 @@ def node_in_parent_graph(state: State):
builder.add_edge(START, "parent_node")
# A checkpointer must be enabled for interrupts to work!
checkpointer = MemorySaver()
checkpointer = InMemorySaver()
graph = builder.compile(checkpointer=checkpointer)
config = {
@@ -1032,7 +1019,7 @@ def node_in_parent_graph(state: State):
Entered `parent_node` a total of 1 times
Entered `node_in_subgraph` a total of 1 times
Entered human_node in sub-graph a total of 1 times
{'__interrupt__': (Interrupt(value='what is your name?', resumable=True, ns=['parent_node:4c3a0248-21f0-1287-eacf-3002bc304db4', 'human_node:2fe86d52-6f70-2a3f-6b2f-b1eededd6348'], when='during'),)}
{'__interrupt__': (Interrupt(value='what is your name?', id='...'),)}
--- Resuming ---
Entered `parent_node` a total of 2 times
Entered human_node in sub-graph a total of 2 times
@@ -1057,7 +1044,7 @@ To avoid issues, refrain from dynamically changing the node's structure between
from langgraph.graph import StateGraph
from langgraph.constants import START
from langgraph.types import interrupt, Command
from langgraph.checkpoint.memory import MemorySaver
from langgraph.checkpoint.memory import InMemorySaver
class State(TypedDict):
@@ -1091,7 +1078,7 @@ To avoid issues, refrain from dynamically changing the node's structure between
builder.add_edge(START, "human_node")
# A checkpointer must be enabled for interrupts to work!
checkpointer = MemorySaver()
checkpointer = InMemorySaver()
graph = builder.compile(checkpointer=checkpointer)
config = {
@@ -1108,7 +1095,7 @@ To avoid issues, refrain from dynamically changing the node's structure between
```
```pycon
{'__interrupt__': (Interrupt(value='what is your name?', resumable=True, ns=['human_node:3a007ef9-c30d-c357-1ec1-86a1a70d8fba'], when='during'),)}
{'__interrupt__': (Interrupt(value='what is your name?', id='...'),)}
Name: N/A. Age: John
{'human_node': {'age': 'John', 'name': 'N/A'}}
```
@@ -121,7 +121,7 @@
"\n",
"# highlight-next-line\n",
"from langgraph.types import Command, interrupt\n",
"from langgraph.checkpoint.memory import MemorySaver\n",
"from langgraph.checkpoint.memory import InMemorySaver\n",
"from IPython.display import Image, display\n",
"\n",
"\n",
@@ -157,7 +157,7 @@
"builder.add_edge(\"step_3\", END)\n",
"\n",
"# Set up memory\n",
"memory = MemorySaver()\n",
"memory = InMemorySaver()\n",
"\n",
"# Add\n",
"graph = builder.compile(checkpointer=memory)\n",
@@ -435,9 +435,9 @@
"workflow.add_edge(\"ask_human\", \"agent\")\n",
"\n",
"# Set up memory\n",
"from langgraph.checkpoint.memory import MemorySaver\n",
"from langgraph.checkpoint.memory import InMemorySaver\n",
"\n",
"memory = MemorySaver()\n",
"memory = InMemorySaver()\n",
"\n",
"# Finally, we compile it!\n",
"# This compiles it into a LangChain Runnable,\n",
@@ -224,7 +224,7 @@
"from langgraph.prebuilt import create_react_agent\n",
"from langgraph.graph import add_messages\n",
"from langgraph.func import entrypoint, task\n",
"from langgraph.checkpoint.memory import MemorySaver\n",
"from langgraph.checkpoint.memory import InMemorySaver\n",
"from langgraph.types import interrupt, Command\n",
"\n",
"model = ChatAnthropic(model=\"claude-3-5-sonnet-latest\")\n",
@@ -272,7 +272,7 @@
" return response[\"messages\"]\n",
"\n",
"\n",
"checkpointer = MemorySaver()\n",
"checkpointer = InMemorySaver()\n",
"\n",
"\n",
"def string_to_uuid(input_string):\n",
+2 -2
View File
@@ -375,7 +375,7 @@ def agent(state) -> Command[Literal["agent", "another_agent", "human"]]:
from langgraph.graph import MessagesState, StateGraph, START
from langgraph.prebuilt import create_react_agent, InjectedState
from langgraph.types import Command, interrupt
from langgraph.checkpoint.memory import MemorySaver
from langgraph.checkpoint.memory import InMemorySaver
model = ChatAnthropic(model="claude-3-5-sonnet-latest")
@@ -467,7 +467,7 @@ def agent(state) -> Command[Literal["agent", "another_agent", "human"]]:
builder.add_edge(START, "travel_advisor")
checkpointer = MemorySaver()
checkpointer = InMemorySaver()
graph = builder.compile(checkpointer=checkpointer)
```
@@ -28,9 +28,9 @@
"1. Create an instance of a checkpointer:\n",
"\n",
" ```python\n",
" from langgraph.checkpoint.memory import MemorySaver\n",
" from langgraph.checkpoint.memory import InMemorySaver\n",
" \n",
" checkpointer = MemorySaver() \n",
" checkpointer = InMemorySaver() \n",
" ```\n",
"\n",
"2. Pass `checkpointer` instance to the `entrypoint()` decorator:\n",
@@ -184,7 +184,7 @@
"from langchain_core.messages import BaseMessage\n",
"from langgraph.graph import add_messages\n",
"from langgraph.func import entrypoint, task\n",
"from langgraph.checkpoint.memory import MemorySaver\n",
"from langgraph.checkpoint.memory import InMemorySaver\n",
"\n",
"\n",
"@task\n",
@@ -193,7 +193,7 @@
" return response\n",
"\n",
"\n",
"checkpointer = MemorySaver()\n",
"checkpointer = InMemorySaver()\n",
"\n",
"\n",
"@entrypoint(checkpointer=checkpointer)\n",
@@ -261,7 +261,7 @@
"\n",
"To add thread-level persistence to our agent:\n",
"\n",
"1. Select a [checkpointer](../../concepts/persistence#checkpointer-libraries): here we will use [MemorySaver](../../reference/checkpoints/#langgraph.checkpoint.memory.MemorySaver), a simple in-memory checkpointer.\n",
"1. Select a [checkpointer](../../concepts/persistence#checkpointer-libraries): here we will use [InMemorySaver](../../reference/checkpoints/#langgraph.checkpoint.memory.InMemorySaver), a simple in-memory checkpointer.\n",
"2. Update our entrypoint to accept the previous messages state as a second argument. Here, we simply append the message updates to the previous sequence of messages.\n",
"3. Choose which values will be returned from the workflow and which will be saved by the checkpointer as `previous` using `entrypoint.final` (optional)"
]
@@ -272,10 +272,10 @@
"metadata": {},
"outputs": [],
"source": [
"from langgraph.checkpoint.memory import MemorySaver\n",
"from langgraph.checkpoint.memory import InMemorySaver\n",
"\n",
"# highlight-next-line\n",
"checkpointer = MemorySaver()\n",
"checkpointer = InMemorySaver()\n",
"\n",
"\n",
"# highlight-next-line\n",
+25 -25
View File
@@ -26,7 +26,7 @@ my_workflow.invoke({"value": 1, "another_value": 2})
```python
import uuid
from langgraph.func import entrypoint, task
from langgraph.checkpoint.memory import MemorySaver
from langgraph.checkpoint.memory import InMemorySaver
# Task that checks if a number is even
@task
@@ -39,7 +39,7 @@ my_workflow.invoke({"value": 1, "another_value": 2})
return "The number is even." if is_even else "The number is odd."
# Create a checkpointer for persistence
checkpointer = MemorySaver()
checkpointer = InMemorySaver()
@entrypoint(checkpointer=checkpointer)
def workflow(inputs: dict) -> str:
@@ -63,7 +63,7 @@ my_workflow.invoke({"value": 1, "another_value": 2})
import uuid
from langchain.chat_models import init_chat_model
from langgraph.func import entrypoint, task
from langgraph.checkpoint.memory import MemorySaver
from langgraph.checkpoint.memory import InMemorySaver
llm = init_chat_model('openai:gpt-3.5-turbo')
@@ -77,7 +77,7 @@ my_workflow.invoke({"value": 1, "another_value": 2})
]).content
# Create a checkpointer for persistence
checkpointer = MemorySaver()
checkpointer = InMemorySaver()
@entrypoint(checkpointer=checkpointer)
def workflow(topic: str) -> str:
@@ -114,7 +114,7 @@ def graph(numbers: list[int]) -> list[str]:
import uuid
from langchain.chat_models import init_chat_model
from langgraph.func import entrypoint, task
from langgraph.checkpoint.memory import MemorySaver
from langgraph.checkpoint.memory import InMemorySaver
# Initialize the LLM model
llm = init_chat_model("openai:gpt-3.5-turbo")
@@ -129,7 +129,7 @@ def graph(numbers: list[int]) -> list[str]:
return response.content
# Create a checkpointer for persistence
checkpointer = MemorySaver()
checkpointer = InMemorySaver()
@entrypoint(checkpointer=checkpointer)
def workflow(topics: list[str]) -> str:
@@ -176,7 +176,7 @@ def some_workflow(some_input: dict) -> int:
import uuid
from typing import TypedDict
from langgraph.func import entrypoint
from langgraph.checkpoint.memory import MemorySaver
from langgraph.checkpoint.memory import InMemorySaver
from langgraph.graph import StateGraph
# Define the shared state type
@@ -194,7 +194,7 @@ def some_workflow(some_input: dict) -> int:
graph = builder.compile()
# Define the functional API workflow
checkpointer = MemorySaver()
checkpointer = InMemorySaver()
@entrypoint(checkpointer=checkpointer)
def workflow(x: int) -> dict:
@@ -227,10 +227,10 @@ def my_workflow(inputs: dict) -> int:
```python
import uuid
from langgraph.func import entrypoint
from langgraph.checkpoint.memory import MemorySaver
from langgraph.checkpoint.memory import InMemorySaver
# Initialize a checkpointer
checkpointer = MemorySaver()
checkpointer = InMemorySaver()
# A reusable sub-workflow that multiplies a number
@entrypoint()
@@ -258,10 +258,10 @@ Example of using the streaming API to stream both updates and custom data.
```python
from langgraph.func import entrypoint
from langgraph.checkpoint.memory import MemorySaver
from langgraph.checkpoint.memory import InMemorySaver
from langgraph.config import get_stream_writer # (1)!
checkpointer = MemorySaver()
checkpointer = InMemorySaver()
@entrypoint(checkpointer=checkpointer)
def main(inputs: dict) -> int:
@@ -316,7 +316,7 @@ for mode, chunk in main.stream( # (5)!
## Retry policy
```python
from langgraph.checkpoint.memory import MemorySaver
from langgraph.checkpoint.memory import InMemorySaver
from langgraph.func import entrypoint, task
from langgraph.types import RetryPolicy
@@ -337,7 +337,7 @@ def get_info():
raise ValueError('Failure')
return "OK"
checkpointer = MemorySaver()
checkpointer = InMemorySaver()
@entrypoint(checkpointer=checkpointer)
def main(inputs, writer):
@@ -392,7 +392,7 @@ for chunk in main.stream({"x": 5}, stream_mode="updates"):
```python
import time
from langgraph.checkpoint.memory import MemorySaver
from langgraph.checkpoint.memory import InMemorySaver
from langgraph.func import entrypoint, task
from langgraph.types import StreamWriter
@@ -414,7 +414,7 @@ def get_info():
return "OK"
# Initialize an in-memory checkpointer for persistence
checkpointer = MemorySaver()
checkpointer = InMemorySaver()
@task
def slow_task():
@@ -504,9 +504,9 @@ def step_3(input_query):
We can now compose these tasks in an [entrypoint](../concepts/functional_api.md#entrypoint):
```python
from langgraph.checkpoint.memory import MemorySaver
from langgraph.checkpoint.memory import InMemorySaver
checkpointer = MemorySaver()
checkpointer = InMemorySaver()
@entrypoint(checkpointer=checkpointer)
@@ -577,12 +577,12 @@ def review_tool_call(tool_call: ToolCall) -> Union[ToolCall, ToolMessage]:
We can now update our [entrypoint](../concepts/functional_api.md#entrypoint) to review the generated tool calls. If a tool call is accepted or revised, we execute in the same way as before. Otherwise, we just append the `ToolMessage` supplied by the human. The results of prior tasks — in this case the initial model call — are persisted, so that they are not run again following the `interrupt`.
```python
from langgraph.checkpoint.memory import MemorySaver
from langgraph.checkpoint.memory import InMemorySaver
from langgraph.graph.message import add_messages
from langgraph.types import Command, interrupt
checkpointer = MemorySaver()
checkpointer = InMemorySaver()
@entrypoint(checkpointer=checkpointer)
@@ -757,9 +757,9 @@ Use `entrypoint.final` to decouple what is returned to the caller from what is p
```python
from typing import Optional
from langgraph.func import entrypoint
from langgraph.checkpoint.memory import MemorySaver
from langgraph.checkpoint.memory import InMemorySaver
checkpointer = MemorySaver()
checkpointer = InMemorySaver()
@entrypoint(checkpointer=checkpointer)
def accumulate(n: int, *, previous: Optional[int]) -> entrypoint.final[int, int]:
@@ -777,14 +777,14 @@ print(accumulate.invoke(3, config=config)) # 3
### Chatbot example
An example of a simple chatbot using the functional API and the `MemorySaver` checkpointer.
An example of a simple chatbot using the functional API and the `InMemorySaver` checkpointer.
The bot is able to remember the previous conversation and continue from where it left off.
```python
from langchain_core.messages import BaseMessage
from langgraph.graph import add_messages
from langgraph.func import entrypoint, task
from langgraph.checkpoint.memory import MemorySaver
from langgraph.checkpoint.memory import InMemorySaver
from langchain_anthropic import ChatAnthropic
model = ChatAnthropic(model="claude-3-5-sonnet-latest")
@@ -794,7 +794,7 @@ def call_model(messages: list[BaseMessage]):
response = model.invoke(messages)
return response
checkpointer = MemorySaver()
checkpointer = InMemorySaver()
@entrypoint(checkpointer=checkpointer)
def workflow(inputs: list[BaseMessage], *, previous: list[BaseMessage]):
+2 -1
View File
@@ -2,5 +2,6 @@
options:
members:
- TAG_HIDDEN
- TAG_NOSTREAM
- START
- END
- END
@@ -256,7 +256,7 @@
"metadata": {},
"outputs": [],
"source": [
"from langgraph.checkpoint.memory import MemorySaver\n",
"from langgraph.checkpoint.memory import InMemorySaver\n",
"from langgraph.graph import StateGraph, START\n",
"from langgraph.graph.message import add_messages\n",
"from typing import Annotated\n",
@@ -267,7 +267,7 @@
" messages: Annotated[list, add_messages]\n",
"\n",
"\n",
"memory = MemorySaver()\n",
"memory = InMemorySaver()\n",
"workflow = StateGraph(State)\n",
"workflow.add_node(\"info\", info_chain)\n",
"workflow.add_node(\"prompt\", prompt_gen_chain)\n",
@@ -1124,7 +1124,7 @@
"metadata": {},
"outputs": [],
"source": [
"from langgraph.checkpoint.memory import MemorySaver\n",
"from langgraph.checkpoint.memory import InMemorySaver\n",
"from langgraph.graph import END, StateGraph, START\n",
"from langgraph.prebuilt import tools_condition\n",
"\n",
@@ -1144,7 +1144,7 @@
"\n",
"# The checkpointer lets the graph persist its state\n",
"# this is a complete memory for the entire graph.\n",
"memory = MemorySaver()\n",
"memory = InMemorySaver()\n",
"part_1_graph = builder.compile(checkpointer=memory)"
]
},
@@ -1943,7 +1943,7 @@
"metadata": {},
"outputs": [],
"source": [
"from langgraph.checkpoint.memory import MemorySaver\n",
"from langgraph.checkpoint.memory import InMemorySaver\n",
"from langgraph.graph import StateGraph\n",
"from langgraph.prebuilt import tools_condition\n",
"\n",
@@ -1967,7 +1967,7 @@
")\n",
"builder.add_edge(\"tools\", \"assistant\")\n",
"\n",
"memory = MemorySaver()\n",
"memory = InMemorySaver()\n",
"part_2_graph = builder.compile(\n",
" checkpointer=memory,\n",
" # NEW: The graph will always halt before executing the \"tools\" node.\n",
@@ -2532,7 +2532,7 @@
"source": [
"from typing import Literal\n",
"\n",
"from langgraph.checkpoint.memory import MemorySaver\n",
"from langgraph.checkpoint.memory import InMemorySaver\n",
"from langgraph.graph import StateGraph\n",
"from langgraph.prebuilt import tools_condition\n",
"\n",
@@ -2576,7 +2576,7 @@
"builder.add_edge(\"safe_tools\", \"assistant\")\n",
"builder.add_edge(\"sensitive_tools\", \"assistant\")\n",
"\n",
"memory = MemorySaver()\n",
"memory = InMemorySaver()\n",
"part_3_graph = builder.compile(\n",
" checkpointer=memory,\n",
" # NEW: The graph will always halt before executing the \"tools\" node.\n",
@@ -3477,7 +3477,7 @@
"source": [
"from typing import Literal\n",
"\n",
"from langgraph.checkpoint.memory import MemorySaver\n",
"from langgraph.checkpoint.memory import InMemorySaver\n",
"from langgraph.graph import StateGraph\n",
"from langgraph.prebuilt import tools_condition\n",
"\n",
@@ -3841,7 +3841,7 @@
"builder.add_conditional_edges(\"fetch_user_info\", route_to_workflow)\n",
"\n",
"# Compile graph\n",
"memory = MemorySaver()\n",
"memory = InMemorySaver()\n",
"part_4_graph = builder.compile(\n",
" checkpointer=memory,\n",
" # Let the user approve or deny the use of sensitive tools\n",
@@ -10,14 +10,14 @@ We will see later that **checkpointing** is _much_ more powerful than simple cha
This tutorial builds on [Add tools](./2-add-tools.md).
## 1. Create a `MemorySaver` checkpointer
## 1. Create a `InMemorySaver` checkpointer
Create a `MemorySaver` checkpointer:
Create a `InMemorySaver` checkpointer:
``` python
from langgraph.checkpoint.memory import MemorySaver
from langgraph.checkpoint.memory import InMemorySaver
memory = MemorySaver()
memory = InMemorySaver()
```
This is in-memory checkpointer, which is convenient for the tutorial. However, in a production application, you would likely change this to use `SqliteSaver` or `PostgresSaver` and connect a database.
@@ -172,7 +172,7 @@ from langchain_tavily import TavilySearch
from langchain_core.messages import BaseMessage
from typing_extensions import TypedDict
from langgraph.checkpoint.memory import MemorySaver
from langgraph.checkpoint.memory import InMemorySaver
from langgraph.graph import StateGraph
from langgraph.graph.message import add_messages
from langgraph.prebuilt import ToolNode, tools_condition
@@ -200,7 +200,7 @@ graph_builder.add_conditional_edges(
)
graph_builder.add_edge("tools", "chatbot")
graph_builder.set_entry_point("chatbot")
memory = MemorySaver()
memory = InMemorySaver()
graph = graph_builder.compile(checkpointer=memory)
```
@@ -33,7 +33,7 @@ from langchain_tavily import TavilySearch
from langchain_core.tools import tool
from typing_extensions import TypedDict
from langgraph.checkpoint.memory import MemorySaver
from langgraph.checkpoint.memory import InMemorySaver
from langgraph.graph import StateGraph, START, END
from langgraph.graph.message import add_messages
from langgraph.prebuilt import ToolNode, tools_condition
@@ -85,7 +85,7 @@ graph_builder.add_edge(START, "chatbot")
We compile the graph with a checkpointer, as before:
```python
memory = MemorySaver()
memory = InMemorySaver()
graph = graph_builder.compile(checkpointer=memory)
```
@@ -230,7 +230,7 @@ from langchain_tavily import TavilySearch
from langchain_core.tools import tool
from typing_extensions import TypedDict
from langgraph.checkpoint.memory import MemorySaver
from langgraph.checkpoint.memory import InMemorySaver
from langgraph.graph import StateGraph, START, END
from langgraph.graph.message import add_messages
from langgraph.prebuilt import ToolNode, tools_condition
@@ -268,7 +268,7 @@ graph_builder.add_conditional_edges(
graph_builder.add_edge("tools", "chatbot")
graph_builder.add_edge(START, "chatbot")
memory = MemorySaver()
memory = InMemorySaver()
graph = graph_builder.compile(checkpointer=memory)
```
@@ -239,7 +239,7 @@ from langchain_core.messages import ToolMessage
from langchain_core.tools import InjectedToolCallId, tool
from typing_extensions import TypedDict
from langgraph.checkpoint.memory import MemorySaver
from langgraph.checkpoint.memory import InMemorySaver
from langgraph.graph import StateGraph, START, END
from langgraph.graph.message import add_messages
from langgraph.prebuilt import ToolNode, tools_condition
@@ -301,7 +301,7 @@ graph_builder.add_conditional_edges(
graph_builder.add_edge("tools", "chatbot")
graph_builder.add_edge(START, "chatbot")
memory = MemorySaver()
memory = InMemorySaver()
graph = graph_builder.compile(checkpointer=memory)
```
@@ -31,7 +31,7 @@ from langchain_tavily import TavilySearch
from langchain_core.messages import BaseMessage
from typing_extensions import TypedDict
from langgraph.checkpoint.memory import MemorySaver
from langgraph.checkpoint.memory import InMemorySaver
from langgraph.graph import StateGraph, START, END
from langgraph.graph.message import add_messages
from langgraph.prebuilt import ToolNode, tools_condition
@@ -60,7 +60,7 @@ graph_builder.add_conditional_edges(
graph_builder.add_edge("tools", "chatbot")
graph_builder.add_edge(START, "chatbot")
memory = MemorySaver()
memory = InMemorySaver()
graph = graph_builder.compile(checkpointer=memory)
```
@@ -12,9 +12,9 @@ Before you begin, ensure you have the following:
=== "Python server"
```shell
# Python >= 3.11 is required.
Python >= 3.11 is required.
```shell
pip install --upgrade "langgraph-cli[inmem]"
```
@@ -322,7 +322,7 @@
"from typing import Annotated, List, Sequence\n",
"from langgraph.graph import END, StateGraph, START\n",
"from langgraph.graph.message import add_messages\n",
"from langgraph.checkpoint.memory import MemorySaver\n",
"from langgraph.checkpoint.memory import InMemorySaver\n",
"from typing_extensions import TypedDict\n",
"\n",
"\n",
@@ -361,7 +361,7 @@
"\n",
"builder.add_conditional_edges(\"generate\", should_continue)\n",
"builder.add_edge(\"reflect\", \"generate\")\n",
"memory = MemorySaver()\n",
"memory = InMemorySaver()\n",
"graph = builder.compile(checkpointer=memory)"
]
},
+37 -35
View File
@@ -272,7 +272,7 @@
},
{
"cell_type": "code",
"execution_count": 7,
"execution_count": null,
"metadata": {},
"outputs": [],
"source": [
@@ -280,10 +280,10 @@
"from typing import Optional, Dict, Any\n",
"from typing_extensions import Annotated, TypedDict\n",
"from langgraph.graph import StateGraph\n",
"from langgraph.runtime import Runtime\n",
"\n",
"from langchain_core.runnables import RunnableConfig\n",
"from langgraph.constants import Send\n",
"from langgraph.checkpoint.memory import MemorySaver\n",
"from langgraph.checkpoint.memory import InMemorySaver\n",
"from langgraph.types import Send\n",
"\n",
"\n",
"def update_candidates(\n",
@@ -307,22 +307,27 @@
" depth: Annotated[int, operator.add]\n",
"\n",
"\n",
"class Configuration(TypedDict, total=False):\n",
"class Context(TypedDict, total=False):\n",
" max_depth: int\n",
" threshold: float\n",
" k: int\n",
" beam_size: int\n",
"\n",
"\n",
"def _ensure_configurable(config: RunnableConfig) -> Configuration:\n",
"class EnsuredContext(TypedDict):\n",
" max_depth: int\n",
" threshold: float\n",
" k: int\n",
" beam_size: int\n",
"\n",
"\n",
"def _ensure_context(ctx: Context) -> EnsuredContext:\n",
" \"\"\"Get params that configure the search algorithm.\"\"\"\n",
" configurable = config.get(\"configurable\", {})\n",
" return {\n",
" **configurable,\n",
" \"max_depth\": configurable.get(\"max_depth\", 10),\n",
" \"threshold\": config.get(\"threshold\", 0.9),\n",
" \"k\": configurable.get(\"k\", 5),\n",
" \"beam_size\": configurable.get(\"beam_size\", 3),\n",
" \"max_depth\": ctx.get(\"max_depth\", 10),\n",
" \"threshold\": ctx.get(\"threshold\", 0.9),\n",
" \"k\": ctx.get(\"k\", 5),\n",
" \"beam_size\": ctx.get(\"beam_size\", 3),\n",
" }\n",
"\n",
"\n",
@@ -330,9 +335,11 @@
" seed: Optional[Candidate]\n",
"\n",
"\n",
"def expand(state: ExpansionState, *, config: RunnableConfig) -> Dict[str, List[str]]:\n",
"def expand(\n",
" state: ExpansionState, *, runtime: Runtime[Context]\n",
") -> Dict[str, List[Candidate]]:\n",
" \"\"\"Generate the next state.\"\"\"\n",
" configurable = _ensure_configurable(config)\n",
" ctx = _ensure_context(runtime.context)\n",
" if not state.get(\"seed\"):\n",
" candidate_str = \"\"\n",
" else:\n",
@@ -342,9 +349,8 @@
" {\n",
" \"problem\": state[\"problem\"],\n",
" \"candidate\": candidate_str,\n",
" \"k\": configurable[\"k\"],\n",
" \"k\": ctx[\"k\"],\n",
" },\n",
" config=config,\n",
" )\n",
" except Exception:\n",
" return {\"candidates\": []}\n",
@@ -354,7 +360,7 @@
" return {\"candidates\": new_candidates}\n",
"\n",
"\n",
"def score(state: ToTState) -> Dict[str, List[float]]:\n",
"def score(state: ToTState) -> Dict[str, Any]:\n",
" \"\"\"Evaluate the candidate generations.\"\"\"\n",
" candidates = state[\"candidates\"]\n",
" scored = []\n",
@@ -363,11 +369,9 @@
" return {\"scored_candidates\": scored, \"candidates\": \"clear\"}\n",
"\n",
"\n",
"def prune(\n",
" state: ToTState, *, config: RunnableConfig\n",
") -> Dict[str, List[Dict[str, Any]]]:\n",
"def prune(state: ToTState, *, runtime: Runtime[Context]) -> Dict[str, Any]:\n",
" scored_candidates = state[\"scored_candidates\"]\n",
" beam_size = _ensure_configurable(config)[\"beam_size\"]\n",
" beam_size = _ensure_context(runtime.context)[\"beam_size\"]\n",
" organized = sorted(\n",
" scored_candidates, key=lambda candidate: candidate[1], reverse=True\n",
" )\n",
@@ -383,11 +387,11 @@
"\n",
"\n",
"def should_terminate(\n",
" state: ToTState, config: RunnableConfig\n",
" state: ToTState, runtime: Runtime[Context]\n",
") -> Union[Literal[\"__end__\"], Send]:\n",
" configurable = _ensure_configurable(config)\n",
" solved = state[\"candidates\"][0].score >= configurable[\"threshold\"]\n",
" if solved or state[\"depth\"] >= configurable[\"max_depth\"]:\n",
" ctx = _ensure_context(runtime.context)\n",
" solved = state[\"candidates\"][0].score >= ctx[\"threshold\"]\n",
" if solved or state[\"depth\"] >= ctx[\"max_depth\"]:\n",
" return \"__end__\"\n",
" return [\n",
" Send(\"expand\", {**state, \"somevalseed\": candidate})\n",
@@ -396,7 +400,7 @@
"\n",
"\n",
"# Create the graph\n",
"builder = StateGraph(state_schema=ToTState, config_schema=Configuration)\n",
"builder = StateGraph(state_schema=ToTState, context_schema=Context)\n",
"\n",
"# Add nodes\n",
"builder.add_node(expand)\n",
@@ -412,7 +416,7 @@
"builder.add_edge(\"__start__\", \"expand\")\n",
"\n",
"# Compile the graph\n",
"graph = builder.compile(checkpointer=MemorySaver())"
"graph = builder.compile(checkpointer=InMemorySaver())"
]
},
{
@@ -467,13 +471,11 @@
}
],
"source": [
"config = {\n",
" \"configurable\": {\n",
" \"thread_id\": \"test_1\",\n",
" \"depth\": 10,\n",
" }\n",
"}\n",
"for step in graph.stream({\"problem\": puzzles[42]}, config):\n",
"for step in graph.stream(\n",
" {\"problem\": puzzles[42]},\n",
" config={\"configurable\": {\"thread_id\": \"test_1\"}},\n",
" context={\"depth\": 10},\n",
"):\n",
" print(step)"
]
},
@@ -491,7 +493,7 @@
}
],
"source": [
"final_state = graph.get_state(config)\n",
"final_state = graph.get_state({\"configurable\": {\"thread_id\": \"test_1\"}})\n",
"winning_solution = final_state.values[\"candidates\"][0]\n",
"search_depth = final_state.values[\"depth\"]\n",
"if winning_solution[1] == 1:\n",
+4 -4
View File
@@ -1029,7 +1029,7 @@
"metadata": {},
"outputs": [],
"source": [
"from langgraph.checkpoint.memory import MemorySaver\n",
"from langgraph.checkpoint.memory import InMemorySaver\n",
"from langgraph.graph import END, StateGraph, START\n",
"\n",
"builder = StateGraph(State)\n",
@@ -1053,7 +1053,7 @@
"builder.add_conditional_edges(\"evaluate\", control_edge, {END: END, \"solve\": \"solve\"})\n",
"\n",
"\n",
"checkpointer = MemorySaver()\n",
"checkpointer = InMemorySaver()\n",
"graph = builder.compile(checkpointer=checkpointer)"
]
},
@@ -1327,7 +1327,7 @@
"outputs": [],
"source": [
"# This is all the same as before\n",
"from langgraph.checkpoint.memory import MemorySaver\n",
"from langgraph.checkpoint.memory import InMemorySaver\n",
"from langgraph.graph import END, StateGraph, START\n",
"\n",
"builder = StateGraph(State)\n",
@@ -1353,7 +1353,7 @@
"\n",
"\n",
"builder.add_conditional_edges(\"evaluate\", control_edge, {END: END, \"solve\": \"solve\"})\n",
"checkpointer = MemorySaver()"
"checkpointer = InMemorySaver()"
]
},
{
+8 -5
View File
@@ -103,14 +103,15 @@ nav:
- 5. Customize state: tutorials/get-started/5-customize-state.md
- 6. Time travel: tutorials/get-started/6-time-travel.md
- Run a local server: tutorials/langgraph-platform/local-server.md
- Agent development:
- General concepts:
- Workflows & agents: tutorials/workflows.md
- Prebuilt components: agents/overview.md
- Run an agent: agents/run_agents.md
- Agent architectures: concepts/agentic_concepts.md
- Guides:
- guides/index.md
- Agent development:
- Overview: agents/overview.md
- Run an agent: agents/run_agents.md
- LangGraph APIs:
- Graph API:
- Overview: concepts/low_level.md
@@ -157,8 +158,10 @@ nav:
- Overview: concepts/mcp.md
- Use MCP: agents/mcp.md
- Server API: concepts/server-mcp.md
- Evaluation:
- Basic implementation: agents/evals.md
- Tracing:
- Overview: concepts/tracing.md
- Enable tracing: how-tos/enable-tracing.md
- Evaluate performance: agents/evals.md
- Platform-only capabilities:
- LangGraph Platform:
- Overview: concepts/langgraph_platform.md
+3 -1
View File
@@ -112,4 +112,6 @@ extend-include = ["*.ipynb"]
[tool.codespell]
# https://mypy.readthedocs.io/en/stable/config_file.html
# comma-separated list
ignore-words-list = "infor"
ignore-words-list = "infor,thead,stdio,nd,jupyter,lets,lite,uis,deque"
# Exclude generated files and directories
skip = "*.ambr,*.lock,*.ipynb,*.yaml,*.zlib,*.css.map,*.js.map"
Generated
+20 -20
View File
@@ -15,16 +15,16 @@ name = "ag2"
version = "0.9.6"
source = { registry = "https://pypi.org/simple" }
dependencies = [
{ name = "anyio" },
{ name = "asyncer" },
{ name = "diskcache" },
{ name = "docker" },
{ name = "httpx" },
{ name = "packaging" },
{ name = "pydantic" },
{ name = "python-dotenv" },
{ name = "termcolor" },
{ name = "tiktoken" },
{ name = "anyio", marker = "python_full_version < '3.13'" },
{ name = "asyncer", marker = "python_full_version < '3.13'" },
{ name = "diskcache", marker = "python_full_version < '3.13'" },
{ name = "docker", marker = "python_full_version < '3.13'" },
{ name = "httpx", marker = "python_full_version < '3.13'" },
{ name = "packaging", marker = "python_full_version < '3.13'" },
{ name = "pydantic", marker = "python_full_version < '3.13'" },
{ name = "python-dotenv", marker = "python_full_version < '3.13'" },
{ name = "termcolor", marker = "python_full_version < '3.13'" },
{ name = "tiktoken", marker = "python_full_version < '3.13'" },
]
sdist = { url = "https://files.pythonhosted.org/packages/ee/15/edfbbf217e19ea647225b3ab72a6e3755d2677665f1a7f8e5108da3feabd/ag2-0.9.6.tar.gz", hash = "sha256:d6f7812b1a49654d14113fa3c13ccb593115dee1193744ca428d7178d2b32090", size = 3356270, upload-time = "2025-07-08T14:56:21.63Z" }
wheels = [
@@ -267,7 +267,7 @@ name = "asyncer"
version = "0.0.8"
source = { registry = "https://pypi.org/simple" }
dependencies = [
{ name = "anyio" },
{ name = "anyio", marker = "python_full_version < '3.13'" },
]
sdist = { url = "https://files.pythonhosted.org/packages/ff/67/7ea59c3e69eaeee42e7fc91a5be67ca5849c8979acac2b920249760c6af2/asyncer-0.0.8.tar.gz", hash = "sha256:a589d980f57e20efb07ed91d0dbe67f1d2fd343e7142c66d3a099f05c620739c", size = 18217, upload-time = "2024-08-24T23:15:36.449Z" }
wheels = [
@@ -288,7 +288,7 @@ name = "autogen"
version = "0.9.6"
source = { registry = "https://pypi.org/simple" }
dependencies = [
{ name = "ag2" },
{ name = "ag2", marker = "python_full_version < '3.13'" },
]
sdist = { url = "https://files.pythonhosted.org/packages/67/b9/dc958031b7e08ee50e3d40f5991f4c0bc21538df8d53aa3e9a9f2e2f7818/autogen-0.9.6.tar.gz", hash = "sha256:dc2efbeef61002608983afb120e62f8a109815eb741bcbc9ef398dcff7424a30", size = 43422, upload-time = "2025-07-08T14:56:17.6Z" }
wheels = [
@@ -914,9 +914,9 @@ name = "docker"
version = "7.1.0"
source = { registry = "https://pypi.org/simple" }
dependencies = [
{ name = "pywin32", marker = "sys_platform == 'win32'" },
{ name = "requests" },
{ name = "urllib3" },
{ name = "pywin32", marker = "python_full_version < '3.13' and sys_platform == 'win32'" },
{ name = "requests", marker = "python_full_version < '3.13'" },
{ name = "urllib3", marker = "python_full_version < '3.13'" },
]
sdist = { url = "https://files.pythonhosted.org/packages/91/9b/4a2ea29aeba62471211598dac5d96825bb49348fa07e906ea930394a83ce/docker-7.1.0.tar.gz", hash = "sha256:ad8c70e6e3f8926cb8a92619b832b4ea5299e2831c14284663184e200546fa6c", size = 117834, upload-time = "2024-05-23T11:13:57.216Z" }
wheels = [
@@ -2337,7 +2337,7 @@ wheels = [
[[package]]
name = "langgraph"
version = "0.5.2"
version = "0.6.0a1"
source = { editable = "../libs/langgraph" }
dependencies = [
{ name = "langchain-core" },
@@ -2365,7 +2365,7 @@ dev = [
{ name = "langgraph-checkpoint", editable = "../libs/checkpoint" },
{ name = "langgraph-checkpoint-postgres", editable = "../libs/checkpoint-postgres" },
{ name = "langgraph-checkpoint-sqlite", editable = "../libs/checkpoint-sqlite" },
{ name = "langgraph-cli", extras = ["inmem"] },
{ name = "langgraph-cli", extras = ["inmem"], editable = "../libs/cli" },
{ name = "langgraph-prebuilt", editable = "../libs/prebuilt" },
{ name = "langgraph-sdk", editable = "../libs/sdk-py" },
{ name = "mypy" },
@@ -2388,7 +2388,7 @@ dev = [
[[package]]
name = "langgraph-checkpoint"
version = "2.1.0"
version = "2.1.1"
source = { editable = "../libs/checkpoint" }
dependencies = [
{ name = "langchain-core" },
@@ -2433,7 +2433,7 @@ wheels = [
[[package]]
name = "langgraph-checkpoint-postgres"
version = "2.0.21"
version = "2.0.23"
source = { editable = "../libs/checkpoint-postgres" }
dependencies = [
{ name = "langgraph-checkpoint" },
@@ -2674,7 +2674,7 @@ dev = [
[[package]]
name = "langgraph-sdk"
version = "0.1.72"
version = "0.2.0a1"
source = { editable = "../libs/sdk-py" }
dependencies = [
{ name = "httpx" },
@@ -154,7 +154,7 @@
"id": "2dff2209-44c7-4e2c-b607-ba6675f9e45f",
"metadata": {},
"outputs": [],
"source": ["from langgraph.checkpoint.memory import MemorySaver\nfrom langgraph.graph import END, StateGraph, START\n\nbuilder = StateGraph(GraphState)\n\n# Define the nodes\nbuilder.add_node(\"generate\", generate) # generation solution\nbuilder.add_node(\"check_code\", code_check) # check code\n\n# Build graph\nbuilder.add_edge(START, \"generate\")\nbuilder.add_edge(\"generate\", \"check_code\")\nbuilder.add_conditional_edges(\n \"check_code\",\n decide_to_finish,\n {\n \"end\": END,\n \"generate\": \"generate\",\n },\n)\n\nmemory = MemorySaver()\ngraph = builder.compile(checkpointer=memory)"]
"source": ["from langgraph.checkpoint.memory import InMemorySaver\nfrom langgraph.graph import END, StateGraph, START\n\nbuilder = StateGraph(GraphState)\n\n# Define the nodes\nbuilder.add_node(\"generate\", generate) # generation solution\nbuilder.add_node(\"check_code\", code_check) # check code\n\n# Build graph\nbuilder.add_edge(START, \"generate\")\nbuilder.add_edge(\"generate\", \"check_code\")\nbuilder.add_conditional_edges(\n \"check_code\",\n decide_to_finish,\n {\n \"end\": END,\n \"generate\": \"generate\",\n },\n)\n\nmemory = InMemorySaver()\ngraph = builder.compile(checkpointer=memory)"]
},
{
"cell_type": "code",
@@ -284,11 +284,9 @@ class PostgresSaver(BasePostgresSaver):
configurable = config["configurable"].copy()
thread_id = configurable.pop("thread_id")
checkpoint_ns = configurable.pop("checkpoint_ns")
checkpoint_id = configurable.pop(
"checkpoint_id", configurable.pop("thread_ts", None)
)
checkpoint_id = configurable.pop("checkpoint_id", None)
copy = checkpoint.copy()
copy["channel_values"] = copy["channel_values"].copy()
next_config = {
"configurable": {
"thread_id": thread_id,
@@ -297,16 +295,28 @@ class PostgresSaver(BasePostgresSaver):
}
}
# inline primitive values in checkpoint table
# others are stored in blobs table
blob_values = {}
for k, v in checkpoint["channel_values"].items():
if v is None or isinstance(v, (str, int, float, bool)):
pass
else:
blob_values[k] = copy["channel_values"].pop(k)
with self._cursor(pipeline=True) as cur:
cur.executemany(
self.UPSERT_CHECKPOINT_BLOBS_SQL,
self._dump_blobs(
thread_id,
checkpoint_ns,
copy.pop("channel_values"), # type: ignore[misc]
new_versions,
),
)
if blob_versions := {
k: v for k, v in new_versions.items() if k in blob_values
}:
cur.executemany(
self.UPSERT_CHECKPOINT_BLOBS_SQL,
self._dump_blobs(
thread_id,
checkpoint_ns,
blob_values,
blob_versions,
),
)
cur.execute(
self.UPSERT_CHECKPOINTS_SQL,
(
@@ -439,7 +449,10 @@ class PostgresSaver(BasePostgresSaver):
},
{
**value["checkpoint"],
"channel_values": self._load_blobs(value["channel_values"]),
"channel_values": {
**value["checkpoint"].get("channel_values"),
**self._load_blobs(value["channel_values"]),
},
},
value["metadata"],
(
@@ -240,11 +240,10 @@ class AsyncPostgresSaver(BasePostgresSaver):
configurable = config["configurable"].copy()
thread_id = configurable.pop("thread_id")
checkpoint_ns = configurable.pop("checkpoint_ns")
checkpoint_id = configurable.pop(
"checkpoint_id", configurable.pop("thread_ts", None)
)
checkpoint_id = configurable.pop("checkpoint_id", None)
copy = checkpoint.copy()
copy["channel_values"] = copy["channel_values"].copy()
next_config = {
"configurable": {
"thread_id": thread_id,
@@ -253,17 +252,29 @@ class AsyncPostgresSaver(BasePostgresSaver):
}
}
# inline primitive values in checkpoint table
# others are stored in blobs table
blob_values = {}
for k, v in checkpoint["channel_values"].items():
if v is None or isinstance(v, (str, int, float, bool)):
pass
else:
blob_values[k] = copy["channel_values"].pop(k)
async with self._cursor(pipeline=True) as cur:
await cur.executemany(
self.UPSERT_CHECKPOINT_BLOBS_SQL,
await asyncio.to_thread(
self._dump_blobs,
thread_id,
checkpoint_ns,
copy.pop("channel_values"), # type: ignore[misc]
new_versions,
),
)
if blob_versions := {
k: v for k, v in new_versions.items() if k in blob_values
}:
await cur.executemany(
self.UPSERT_CHECKPOINT_BLOBS_SQL,
await asyncio.to_thread(
self._dump_blobs,
thread_id,
checkpoint_ns,
blob_values,
blob_versions,
),
)
await cur.execute(
self.UPSERT_CHECKPOINTS_SQL,
(
@@ -397,7 +408,10 @@ class AsyncPostgresSaver(BasePostgresSaver):
},
{
**value["checkpoint"],
"channel_values": self._load_blobs(value["channel_values"]),
"channel_values": {
**value["checkpoint"].get("channel_values"),
**self._load_blobs(value["channel_values"]),
},
},
value["metadata"],
(
@@ -191,7 +191,7 @@ class ShallowPostgresSaver(BasePostgresSaver):
) -> None:
warnings.warn(
"ShallowPostgresSaver is deprecated as of version 2.0.20 and will be removed in 3.0.0. "
"Use PostgresSaver instead, and invoke the graph with `graph.invoke(..., checkpoint_during=False)`.",
"Use PostgresSaver instead, and invoke the graph with `graph.invoke(..., durability='exit')`.",
DeprecationWarning,
stacklevel=2,
)
@@ -547,7 +547,7 @@ class AsyncShallowPostgresSaver(BasePostgresSaver):
) -> None:
warnings.warn(
"AsyncShallowPostgresSaver is deprecated as of version 2.0.20 and will be removed in 3.0.0. "
"Use AsyncPostgresSaver instead, and invoke the graph with `await graph.ainvoke(..., checkpoint_during=False)`.",
"Use AsyncPostgresSaver instead, and invoke the graph with `await graph.ainvoke(..., durability='exit')`.",
DeprecationWarning,
stacklevel=2,
)
+1 -1
View File
@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
[project]
name = "langgraph-checkpoint-postgres"
version = "2.0.22"
version = "2.0.23"
description = "Library with a Postgres implementation of LangGraph checkpoint saver."
authors = []
requires-python = ">=3.9"
+1 -2
View File
@@ -161,8 +161,7 @@ def test_data():
config_1: RunnableConfig = {
"configurable": {
"thread_id": "thread-1",
# for backwards compatibility testing
"thread_ts": "1",
"checkpoint_id": "1",
"checkpoint_ns": "",
}
}
+1 -2
View File
@@ -143,8 +143,7 @@ def test_data():
config_1: RunnableConfig = {
"configurable": {
"thread_id": "thread-1",
# for backwards compatibility testing
"thread_ts": "1",
"checkpoint_id": "1",
"checkpoint_ns": "",
}
}
+2 -2
View File
@@ -304,7 +304,7 @@ wheels = [
[[package]]
name = "langgraph-checkpoint"
version = "2.1.0"
version = "2.1.1"
source = { editable = "../checkpoint" }
dependencies = [
{ name = "langchain-core" },
@@ -334,7 +334,7 @@ dev = [
[[package]]
name = "langgraph-checkpoint-postgres"
version = "2.0.22"
version = "2.0.23"
source = { editable = "." }
dependencies = [
{ name = "langgraph-checkpoint" },
@@ -29,7 +29,7 @@ _AIO_ERROR_MSG = (
"from langgraph.checkpoint.sqlite.aio import AsyncSqliteSaver\n"
"Note: AsyncSqliteSaver requires the aiosqlite package to use.\n"
"Install with:\n`pip install aiosqlite`\n"
"See https://langchain-ai.github.io/langgraph/reference/checkpoints/asyncsqlitesaver"
"See https://langchain-ai.github.io/langgraph/reference/checkpoints/#langgraph.checkpoint.sqlite.aio.AsyncSqliteSaver"
"for more information."
)
@@ -19,8 +19,7 @@ class TestAsyncSqliteSaver:
self.config_1: RunnableConfig = {
"configurable": {
"thread_id": "thread-1",
# for backwards compatibility testing
"thread_ts": "1",
"checkpoint_id": "1",
"checkpoint_ns": "",
}
}
+1 -1
View File
@@ -21,7 +21,7 @@ class TestSqliteSaver:
"configurable": {
"thread_id": "thread-1",
# for backwards compatibility testing
"thread_ts": "1",
"checkpoint_id": "1",
"checkpoint_ns": "",
}
}
+1 -1
View File
@@ -316,7 +316,7 @@ wheels = [
[[package]]
name = "langgraph-checkpoint"
version = "2.1.0"
version = "2.1.1"
source = { editable = "../checkpoint" }
dependencies = [
{ name = "langchain-core" },
+3 -3
View File
@@ -36,7 +36,7 @@ Each checkpointer should conform to `langgraph.checkpoint.base.BaseCheckpointSav
- `.put` - Store a checkpoint with its configuration and metadata.
- `.put_writes` - Store intermediate writes linked to a checkpoint (i.e. pending writes).
- `.get_tuple` - Fetch a checkpoint tuple using for a given configuration (`thread_id` and `thread_ts`).
- `.get_tuple` - Fetch a checkpoint tuple using for a given configuration (`thread_id` and `checkpoint_id`).
- `.list` - List checkpoints that match a given configuration and filter criteria.
If the checkpointer will be used with asynchronous graph execution (i.e. executing the graph via `.ainvoke`, `.astream`, `.abatch`), checkpointer must implement asynchronous versions of the above methods (`.aput`, `.aput_writes`, `.aget_tuple`, `.alist`).
@@ -44,12 +44,12 @@ If the checkpointer will be used with asynchronous graph execution (i.e. executi
## Usage
```python
from langgraph.checkpoint.memory import MemorySaver
from langgraph.checkpoint.memory import InMemorySaver
write_config = {"configurable": {"thread_id": "1", "checkpoint_ns": ""}}
read_config = {"configurable": {"thread_id": "1"}}
checkpointer = MemorySaver()
checkpointer = InMemorySaver()
checkpoint = {
"v": 4,
"ts": "2024-07-31T20:14:19.804150+00:00",
@@ -375,10 +375,8 @@ class EmptyChannelError(Exception):
def get_checkpoint_id(config: RunnableConfig) -> str | None:
"""Get checkpoint ID in a backwards-compatible manner (fallback on thread_ts)."""
return config["configurable"].get(
"checkpoint_id", config["configurable"].get("thread_ts")
)
"""Get checkpoint ID."""
return config["configurable"].get("checkpoint_id")
def get_checkpoint_metadata(
@@ -413,7 +411,6 @@ WRITES_IDX_MAP = {ERROR: -1, SCHEDULED: -2, INTERRUPT: -3, RESUME: -4}
EXCLUDED_METADATA_KEYS = {
"thread_id",
"thread_ts",
"checkpoint_id",
"checkpoint_ns",
"checkpoint_map",
@@ -343,10 +343,14 @@ async def _run(
# set the results of each operation
for fut, result in zip(futs, results):
fut.set_result(result)
# guard against future being done (e.g. cancelled)
if not fut.done():
fut.set_result(result)
except Exception as e:
for fut in futs:
fut.set_exception(e)
# guard against future being done (e.g. cancelled)
if not fut.done():
fut.set_exception(e)
finally:
# remove strong ref to store
del s
+1 -1
View File
@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
[project]
name = "langgraph-checkpoint"
version = "2.1.0"
version = "2.1.1"
description = "Library with base interfaces for LangGraph checkpoint savers."
authors = []
requires-python = ">=3.9"
+3 -4
View File
@@ -22,8 +22,7 @@ class TestMemorySaver:
"configurable": {
"thread_id": "thread-1",
"checkpoint_ns": "",
# for backwards compatibility testing
"thread_ts": "1",
"checkpoint_id": "1",
}
}
self.config_2: RunnableConfig = {
@@ -190,6 +189,6 @@ class TestMemorySaver:
def test_memory_saver() -> None:
from langgraph.checkpoint.memory import MemorySaver
from langgraph.checkpoint.memory import InMemorySaver
assert isinstance(MemorySaver(), InMemorySaver)
assert isinstance(InMemorySaver(), InMemorySaver)
+37
View File
@@ -155,6 +155,43 @@ async def test_async_batch_store(mocker: MockerFixture) -> None:
]
async def test_async_batch_store_handles_cancellation() -> None:
class MockStore(AsyncBatchedBaseStore):
def batch(self, ops: Iterable[Op]) -> list[Result]:
raise NotImplementedError
async def abatch(self, ops: Iterable[Op]) -> list[Result]:
assert all(isinstance(op, GetOp) for op in ops)
return [
Item(
value={},
key=getattr(op, "key", ""),
namespace=getattr(op, "namespace", ()),
created_at=datetime(2024, 9, 24, 17, 29, 10, 128397),
updated_at=datetime(2024, 9, 24, 17, 29, 10, 128397),
)
for op in ops
]
store = MockStore()
# Simulate cancellation
task = asyncio.create_task(store.aget(namespace=("a",), key="b"))
await asyncio.sleep(0)
task.cancel()
await asyncio.sleep(0)
# Cancelling individual queries against the store should not break the store
result = await store.aget(namespace=("c",), key="d")
assert result == Item(
value={},
key="d",
namespace=("c",),
created_at=datetime(2024, 9, 24, 17, 29, 10, 128397),
updated_at=datetime(2024, 9, 24, 17, 29, 10, 128397),
)
def test_list_namespaces_basic() -> None:
store = InMemoryStore()
+1 -1
View File
@@ -323,7 +323,7 @@ wheels = [
[[package]]
name = "langgraph-checkpoint"
version = "2.1.0"
version = "2.1.1"
source = { editable = "." }
dependencies = [
{ name = "langchain-core" },
+2 -2
View File
@@ -49,12 +49,12 @@ def call_model(state, config):
tool_node = ToolNode(tools)
class ConfigSchema(TypedDict):
class ContextSchema(TypedDict):
model: Literal["anthropic", "openai"]
# Define a new graph
workflow = StateGraph(AgentState, config_schema=ConfigSchema)
workflow = StateGraph(AgentState, context_schema=ContextSchema)
# Define the two nodes we will cycle between
workflow.add_node("agent", call_model)
+2 -2
View File
@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
[project]
name = "langgraph-cli"
version = "0.3.4"
version = "0.3.5"
description = "CLI for interacting with LangGraph API"
authors = []
requires-python = ">=3.9"
@@ -19,7 +19,7 @@ dependencies = [
[project.optional-dependencies]
inmem = [
"langgraph-api>=0.2.67,<0.3.0 ; python_version >= '3.11'",
"langgraph-runtime-inmem>=0.3.0,<0.4.0 ; python_version >= '3.11'",
"langgraph-runtime-inmem>=0.6.0 ; python_version >= '3.11'",
"python-dotenv>=0.8.0",
]
+170 -160
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[[package]]
+2 -2
View File
@@ -73,7 +73,7 @@ While LangGraph can be used standalone, it also integrates seamlessly with any L
- [Guides](https://langchain-ai.github.io/langgraph/how-tos/): Quick, actionable code snippets for topics such as streaming, adding memory & persistence, and design patterns (e.g. branching, subgraphs, etc.).
- [Reference](https://langchain-ai.github.io/langgraph/reference/graphs/): Detailed reference on core classes, methods, how to use the graph and checkpointing APIs, and higher-level prebuilt components.
- [Examples](https://langchain-ai.github.io/langgraph/tutorials/overview/): Guided examples on getting started with LangGraph.
- [Examples](https://langchain-ai.github.io/langgraph/examples/): Guided examples on getting started with LangGraph.
- [LangChain Forum](https://forum.langchain.com/): Connect with the community and share all of your technical questions, ideas, and feedback.
- [LangChain Academy](https://academy.langchain.com/courses/intro-to-langgraph): Learn the basics of LangGraph in our free, structured course.
- [Templates](https://langchain-ai.github.io/langgraph/concepts/template_applications/): Pre-built reference apps for common agentic workflows (e.g. ReAct agent, memory, retrieval etc.) that can be cloned and adapted.
@@ -81,4 +81,4 @@ While LangGraph can be used standalone, it also integrates seamlessly with any L
## Acknowledgements
LangGraph is inspired by [Pregel](https://research.google/pubs/pub37252/) and [Apache Beam](https://beam.apache.org/). The public interface draws inspiration from [NetworkX](https://networkx.org/documentation/latest/). LangGraph is built by LangChain Inc, the creators of LangChain, but can be used without LangChain.
LangGraph is inspired by [Pregel](https://research.google/pubs/pub37252/) and [Apache Beam](https://beam.apache.org/). The public interface draws inspiration from [NetworkX](https://networkx.org/documentation/latest/). LangGraph is built by LangChain Inc, the creators of LangChain, but can be used without LangChain.
+31 -31
View File
@@ -11,7 +11,7 @@ from bench.react_agent import react_agent
from bench.sequential import create_sequential
from bench.wide_dict import wide_dict
from bench.wide_state import wide_state
from langgraph.checkpoint.memory import MemorySaver
from langgraph.checkpoint.memory import InMemorySaver
from langgraph.graph import StateGraph
from langgraph.pregel import Pregel
@@ -26,7 +26,7 @@ async def arun(graph: Pregel, input: dict):
"configurable": {"thread_id": str(uuid4())},
"recursion_limit": 1000000000,
},
checkpoint_during=False,
durability="exit",
)
]
)
@@ -43,7 +43,7 @@ async def arun_first_event_latency(graph: Pregel, input: dict) -> None:
"configurable": {"thread_id": str(uuid4())},
"recursion_limit": 1000000000,
},
checkpoint_during=False,
durability="exit",
)
try:
@@ -63,7 +63,7 @@ def run(graph: Pregel, input: dict):
"configurable": {"thread_id": str(uuid4())},
"recursion_limit": 1000000000,
},
checkpoint_during=False,
durability="exit",
)
]
)
@@ -80,7 +80,7 @@ def run_first_event_latency(graph: Pregel, input: dict) -> None:
"configurable": {"thread_id": str(uuid4())},
"recursion_limit": 1000000000,
},
checkpoint_during=False,
durability="exit",
)
try:
@@ -108,8 +108,8 @@ benchmarks = (
),
(
"fanout_to_subgraph_10x_checkpoint",
fanout_to_subgraph().compile(checkpointer=MemorySaver()),
fanout_to_subgraph_sync().compile(checkpointer=MemorySaver()),
fanout_to_subgraph().compile(checkpointer=InMemorySaver()),
fanout_to_subgraph_sync().compile(checkpointer=InMemorySaver()),
{
"subjects": [
random.choices("abcdefghijklmnopqrstuvwxyz", k=1000) for _ in range(10)
@@ -128,8 +128,8 @@ benchmarks = (
),
(
"fanout_to_subgraph_100x_checkpoint",
fanout_to_subgraph().compile(checkpointer=MemorySaver()),
fanout_to_subgraph_sync().compile(checkpointer=MemorySaver()),
fanout_to_subgraph().compile(checkpointer=InMemorySaver()),
fanout_to_subgraph_sync().compile(checkpointer=InMemorySaver()),
{
"subjects": [
random.choices("abcdefghijklmnopqrstuvwxyz", k=1000) for _ in range(100)
@@ -144,8 +144,8 @@ benchmarks = (
),
(
"react_agent_10x_checkpoint",
react_agent(10, checkpointer=MemorySaver()),
react_agent(10, checkpointer=MemorySaver()),
react_agent(10, checkpointer=InMemorySaver()),
react_agent(10, checkpointer=InMemorySaver()),
{"messages": [HumanMessage("hi?")]},
),
(
@@ -156,8 +156,8 @@ benchmarks = (
),
(
"react_agent_100x_checkpoint",
react_agent(100, checkpointer=MemorySaver()),
react_agent(100, checkpointer=MemorySaver()),
react_agent(100, checkpointer=InMemorySaver()),
react_agent(100, checkpointer=InMemorySaver()),
{"messages": [HumanMessage("hi?")]},
),
(
@@ -178,8 +178,8 @@ benchmarks = (
),
(
"wide_state_25x300_checkpoint",
wide_state(300).compile(checkpointer=MemorySaver()),
wide_state(300).compile(checkpointer=MemorySaver()),
wide_state(300).compile(checkpointer=InMemorySaver()),
wide_state(300).compile(checkpointer=InMemorySaver()),
{
"messages": [
{
@@ -210,8 +210,8 @@ benchmarks = (
),
(
"wide_state_15x600_checkpoint",
wide_state(600).compile(checkpointer=MemorySaver()),
wide_state(600).compile(checkpointer=MemorySaver()),
wide_state(600).compile(checkpointer=InMemorySaver()),
wide_state(600).compile(checkpointer=InMemorySaver()),
{
"messages": [
{
@@ -242,8 +242,8 @@ benchmarks = (
),
(
"wide_state_9x1200_checkpoint",
wide_state(1200).compile(checkpointer=MemorySaver()),
wide_state(1200).compile(checkpointer=MemorySaver()),
wide_state(1200).compile(checkpointer=InMemorySaver()),
wide_state(1200).compile(checkpointer=InMemorySaver()),
{
"messages": [
{
@@ -274,8 +274,8 @@ benchmarks = (
),
(
"wide_dict_25x300_checkpoint",
wide_dict(300).compile(checkpointer=MemorySaver()),
wide_dict(300).compile(checkpointer=MemorySaver()),
wide_dict(300).compile(checkpointer=InMemorySaver()),
wide_dict(300).compile(checkpointer=InMemorySaver()),
{
"messages": [
{
@@ -306,8 +306,8 @@ benchmarks = (
),
(
"wide_dict_15x600_checkpoint",
wide_dict(600).compile(checkpointer=MemorySaver()),
wide_dict(600).compile(checkpointer=MemorySaver()),
wide_dict(600).compile(checkpointer=InMemorySaver()),
wide_dict(600).compile(checkpointer=InMemorySaver()),
{
"messages": [
{
@@ -338,8 +338,8 @@ benchmarks = (
),
(
"wide_dict_9x1200_checkpoint",
wide_dict(1200).compile(checkpointer=MemorySaver()),
wide_dict(1200).compile(checkpointer=MemorySaver()),
wide_dict(1200).compile(checkpointer=InMemorySaver()),
wide_dict(1200).compile(checkpointer=InMemorySaver()),
{
"messages": [
{
@@ -382,8 +382,8 @@ benchmarks = (
),
(
"pydantic_state_25x300_checkpoint",
pydantic_state(300).compile(checkpointer=MemorySaver()),
pydantic_state(300).compile(checkpointer=MemorySaver()),
pydantic_state(300).compile(checkpointer=InMemorySaver()),
pydantic_state(300).compile(checkpointer=InMemorySaver()),
{
"messages": [
{
@@ -414,8 +414,8 @@ benchmarks = (
),
(
"pydantic_state_15x600_checkpoint",
pydantic_state(600).compile(checkpointer=MemorySaver()),
pydantic_state(600).compile(checkpointer=MemorySaver()),
pydantic_state(600).compile(checkpointer=InMemorySaver()),
pydantic_state(600).compile(checkpointer=InMemorySaver()),
{
"messages": [
{
@@ -446,8 +446,8 @@ benchmarks = (
),
(
"pydantic_state_9x1200_checkpoint",
pydantic_state(1200).compile(checkpointer=MemorySaver()),
pydantic_state(1200).compile(checkpointer=MemorySaver()),
pydantic_state(1200).compile(checkpointer=InMemorySaver()),
pydantic_state(1200).compile(checkpointer=InMemorySaver()),
{
"messages": [
{
+4 -3
View File
@@ -3,8 +3,9 @@ from typing import Annotated
from typing_extensions import TypedDict
from langgraph.constants import END, START, Send
from langgraph.constants import END, START
from langgraph.graph.state import StateGraph
from langgraph.types import Send
def fanout_to_subgraph() -> StateGraph:
@@ -114,9 +115,9 @@ if __name__ == "__main__":
import uvloop
from langgraph.checkpoint.memory import MemorySaver
from langgraph.checkpoint.memory import InMemorySaver
graph = fanout_to_subgraph().compile(checkpointer=MemorySaver())
graph = fanout_to_subgraph().compile(checkpointer=InMemorySaver())
input = {
"subjects": [
random.choices("abcdefghijklmnopqrstuvwxyz", k=1000) for _ in range(1000)
+2 -2
View File
@@ -304,9 +304,9 @@ if __name__ == "__main__":
import uvloop
from langgraph.checkpoint.memory import MemorySaver
from langgraph.checkpoint.memory import InMemorySaver
graph = pydantic_state(1000).compile(checkpointer=MemorySaver())
graph = pydantic_state(1000).compile(checkpointer=InMemorySaver())
input = {
"messages": [
{
+2 -2
View File
@@ -68,9 +68,9 @@ if __name__ == "__main__":
import uvloop
from langgraph.checkpoint.memory import MemorySaver
from langgraph.checkpoint.memory import InMemorySaver
graph = react_agent(100, checkpointer=MemorySaver())
graph = react_agent(100, checkpointer=InMemorySaver())
input = {"messages": [HumanMessage("hi?")]}
config = {"configurable": {"thread_id": "1"}, "recursion_limit": 20000000000}
+1 -1
View File
@@ -1,7 +1,7 @@
"""Create a sequential no-op graph consisting of a few hundred nodes."""
from langgraph._internal._runnable import RunnableCallable
from langgraph.graph import MessagesState, StateGraph
from langgraph.utils.runnable import RunnableCallable
def create_sequential(number_nodes: int) -> StateGraph:
+2 -2
View File
@@ -130,9 +130,9 @@ if __name__ == "__main__":
import uvloop
from langgraph.checkpoint.memory import MemorySaver
from langgraph.checkpoint.memory import InMemorySaver
graph = wide_dict(1000).compile(checkpointer=MemorySaver())
graph = wide_dict(1000).compile(checkpointer=InMemorySaver())
input = {
"messages": [
{
+2 -2
View File
@@ -140,9 +140,9 @@ if __name__ == "__main__":
import uvloop
from langgraph.checkpoint.memory import MemorySaver
from langgraph.checkpoint.memory import InMemorySaver
graph = wide_state(1000).compile(checkpointer=MemorySaver())
graph = wide_state(1000).compile(checkpointer=InMemorySaver())
input = {
"messages": [
{
@@ -0,0 +1,4 @@
"""Internal modules for LangGraph.
This module is not part of the public API, and thus stability is not guaranteed.
"""
@@ -18,9 +18,7 @@ from langchain_core.runnables.config import (
var_child_runnable_config,
)
from langgraph.checkpoint.base import CheckpointMetadata
from langgraph.config import get_config, get_store, get_stream_writer # noqa
from langgraph.constants import (
from langgraph._internal._constants import (
CONF,
CONFIG_KEY_CHECKPOINT_ID,
CONFIG_KEY_CHECKPOINT_MAP,
@@ -28,6 +26,7 @@ from langgraph.constants import (
NS_END,
NS_SEP,
)
from langgraph.checkpoint.base import CheckpointMetadata
DEFAULT_RECURSION_LIMIT = int(getenv("LANGGRAPH_DEFAULT_RECURSION_LIMIT", "25"))
@@ -0,0 +1,110 @@
"""Constants used for Pregel operations."""
import sys
from typing import Literal, cast
# --- Reserved write keys ---
INPUT = sys.intern("__input__")
# for values passed as input to the graph
INTERRUPT = sys.intern("__interrupt__")
# for dynamic interrupts raised by nodes
RESUME = sys.intern("__resume__")
# for values passed to resume a node after an interrupt
ERROR = sys.intern("__error__")
# for errors raised by nodes
NO_WRITES = sys.intern("__no_writes__")
# marker to signal node didn't write anything
TASKS = sys.intern("__pregel_tasks")
# for Send objects returned by nodes/edges, corresponds to PUSH below
RETURN = sys.intern("__return__")
# for writes of a task where we simply record the return value
PREVIOUS = sys.intern("__previous__")
# the implicit branch that handles each node's Control values
# --- Reserved cache namespaces ---
CACHE_NS_WRITES = sys.intern("__pregel_ns_writes")
# cache namespace for node writes
# --- Reserved config.configurable keys ---
CONFIG_KEY_SEND = sys.intern("__pregel_send")
# holds the `write` function that accepts writes to state/edges/reserved keys
CONFIG_KEY_READ = sys.intern("__pregel_read")
# holds the `read` function that returns a copy of the current state
CONFIG_KEY_CALL = sys.intern("__pregel_call")
# holds the `call` function that accepts a node/func, args and returns a future
CONFIG_KEY_CHECKPOINTER = sys.intern("__pregel_checkpointer")
# holds a `BaseCheckpointSaver` passed from parent graph to child graphs
CONFIG_KEY_STREAM = sys.intern("__pregel_stream")
# holds a `StreamProtocol` passed from parent graph to child graphs
CONFIG_KEY_CACHE = sys.intern("__pregel_cache")
# holds a `BaseCache` made available to subgraphs
CONFIG_KEY_RESUMING = sys.intern("__pregel_resuming")
# holds a boolean indicating if subgraphs should resume from a previous checkpoint
CONFIG_KEY_TASK_ID = sys.intern("__pregel_task_id")
# holds the task ID for the current task
CONFIG_KEY_THREAD_ID = sys.intern("thread_id")
# holds the thread ID for the current invocation
CONFIG_KEY_CHECKPOINT_MAP = sys.intern("checkpoint_map")
# holds a mapping of checkpoint_ns -> checkpoint_id for parent graphs
CONFIG_KEY_CHECKPOINT_ID = sys.intern("checkpoint_id")
# holds the current checkpoint_id, if any
CONFIG_KEY_CHECKPOINT_NS = sys.intern("checkpoint_ns")
# holds the current checkpoint_ns, "" for root graph
CONFIG_KEY_NODE_FINISHED = sys.intern("__pregel_node_finished")
# holds a callback to be called when a node is finished
CONFIG_KEY_SCRATCHPAD = sys.intern("__pregel_scratchpad")
# holds a mutable dict for temporary storage scoped to the current task
CONFIG_KEY_RUNNER_SUBMIT = sys.intern("__pregel_runner_submit")
# holds a function that receives tasks from runner, executes them and returns results
CONFIG_KEY_DURABILITY = sys.intern("__pregel_durability")
# holds the durability mode, one of "sync", "async", or "exit"
CONFIG_KEY_RUNTIME = sys.intern("__pregel_runtime")
# holds a `Runtime` instance with context, store, stream writer, etc.
CONFIG_KEY_RESUME_MAP = sys.intern("__pregel_resume_map")
# holds a mapping of task ns -> resume value for resuming tasks
# --- Other constants ---
PUSH = sys.intern("__pregel_push")
# denotes push-style tasks, ie. those created by Send objects
PULL = sys.intern("__pregel_pull")
# denotes pull-style tasks, ie. those triggered by edges
NS_SEP = sys.intern("|")
# for checkpoint_ns, separates each level (ie. graph|subgraph|subsubgraph)
NS_END = sys.intern(":")
# for checkpoint_ns, for each level, separates the namespace from the task_id
CONF = cast(Literal["configurable"], sys.intern("configurable"))
# key for the configurable dict in RunnableConfig
NULL_TASK_ID = sys.intern("00000000-0000-0000-0000-000000000000")
# the task_id to use for writes that are not associated with a task
# redefined to avoid circular import with langgraph.constants
_TAG_HIDDEN = sys.intern("langsmith:hidden")
RESERVED = {
_TAG_HIDDEN,
# reserved write keys
INPUT,
INTERRUPT,
RESUME,
ERROR,
NO_WRITES,
# reserved config.configurable keys
CONFIG_KEY_SEND,
CONFIG_KEY_READ,
CONFIG_KEY_CHECKPOINTER,
CONFIG_KEY_STREAM,
CONFIG_KEY_CHECKPOINT_MAP,
CONFIG_KEY_RESUMING,
CONFIG_KEY_TASK_ID,
CONFIG_KEY_CHECKPOINT_MAP,
CONFIG_KEY_CHECKPOINT_ID,
CONFIG_KEY_CHECKPOINT_NS,
CONFIG_KEY_RESUME_MAP,
# other constants
PUSH,
PULL,
NS_SEP,
NS_END,
CONF,
}
@@ -9,9 +9,7 @@ from typing import Annotated, Any, Optional, Union, get_type_hints
from pydantic import BaseModel
from typing_extensions import NotRequired, ReadOnly, Required, get_origin
# NOTE: this is redefined here separately from langgraph.constants
# to avoid a circular import
MISSING = object()
from langgraph._internal._typing import MISSING
def _is_optional_type(type_: Any) -> bool:
@@ -128,6 +128,3 @@ class SyncQueue:
return len(self._queue)
__class_getitem__ = classmethod(types.GenericAlias)
__all__ = ["AsyncQueue", "SyncQueue"]
@@ -0,0 +1,29 @@
def default_retry_on(exc: Exception) -> bool:
import httpx
import requests
if isinstance(exc, ConnectionError):
return True
if isinstance(exc, httpx.HTTPStatusError):
return 500 <= exc.response.status_code < 600
if isinstance(exc, requests.HTTPError):
return 500 <= exc.response.status_code < 600 if exc.response else True
if isinstance(
exc,
(
ValueError,
TypeError,
ArithmeticError,
ImportError,
LookupError,
NameError,
SyntaxError,
RuntimeError,
ReferenceError,
StopIteration,
StopAsyncIteration,
OSError,
),
):
return False
return True
@@ -42,20 +42,19 @@ from langchain_core.runnables.utils import Input, Output
from langchain_core.tracers.langchain import LangChainTracer
from typing_extensions import TypeGuard
from langgraph.constants import (
CONF,
CONFIG_KEY_PREVIOUS,
CONFIG_KEY_STORE,
CONFIG_KEY_STREAM_WRITER,
)
from langgraph.store.base import BaseStore
from langgraph.types import StreamWriter
from langgraph.utils.config import (
from langgraph._internal._config import (
ensure_config,
get_async_callback_manager_for_config,
get_callback_manager_for_config,
patch_config,
)
from langgraph._internal._constants import (
CONF,
CONFIG_KEY_RUNTIME,
)
from langgraph._internal._typing import MISSING
from langgraph.store.base import BaseStore
from langgraph.types import StreamWriter
try:
from langchain_core.tracers._streaming import _StreamingCallbackHandler
@@ -128,45 +127,52 @@ ANY_TYPE = object()
ASYNCIO_ACCEPTS_CONTEXT = sys.version_info >= (3, 11)
# List of keyword arguments that can be injected at runtime from the config object.
# List of keyword arguments that can be injected into nodes / tasks / tools at runtime.
# A named argument may appear multiple times if it appears with distinct types.
KWARGS_CONFIG_KEYS: tuple[tuple[str, tuple[Any, ...], str, Any], ...] = (
(
sys.intern("writer"),
"config",
(RunnableConfig, "RunnableConfig", inspect.Parameter.empty),
# for now, use config directly, eventually, will pop off of Runtime
"N/A",
inspect.Parameter.empty,
),
(
"writer",
(StreamWriter, "StreamWriter", inspect.Parameter.empty),
CONFIG_KEY_STREAM_WRITER,
"stream_writer",
lambda _: None,
),
(
# Covers store that is not optional (will raise an error if a store
# cannot be injected).
sys.intern("store"),
"store",
(
BaseStore,
"BaseStore",
inspect.Parameter.empty,
),
CONFIG_KEY_STORE,
"store",
inspect.Parameter.empty,
),
(
# Covers store that is optional. Will set to None if not found in config.
sys.intern("store"),
"store",
(
Optional[BaseStore],
# Best effort to catch some forward references.
# This will not work for cases like `"Union[None, BaseStore]"`,
# we'll need to re-write logic to use get_type_hints()
# to resolve forward references.
"Optional[BaseStore]",
),
CONFIG_KEY_STORE,
"store",
None,
),
(
sys.intern("previous"),
"previous",
(ANY_TYPE,),
CONFIG_KEY_PREVIOUS,
"previous",
inspect.Parameter.empty,
),
(
"runtime",
(ANY_TYPE,),
# we never hit this block, we just inject runtime directly
"N/A",
inspect.Parameter.empty,
),
)
@@ -174,7 +180,7 @@ KWARGS_CONFIG_KEYS: tuple[tuple[str, tuple[Any, ...], str, Any], ...] = (
config keys, default values and type annotations.
Used to configure keyword arguments that can be injected at runtime
from the config object as kwargs to `invoke`, `ainvoke`, `stream` and `astream`.
from the `Runtime` object as kwargs to `invoke`, `ainvoke`, `stream` and `astream`.
For a keyword to be injected from the config object, the function signature
must contain a kwarg with the same name and a matching type annotation.
@@ -182,8 +188,10 @@ must contain a kwarg with the same name and a matching type annotation.
Each tuple contains:
- the name of the kwarg in the function signature
- the type annotation(s) for the kwarg
- the config key to look for the value in
- the default value for the kwarg
- the `Runtime` attribute for fetching the value (N/A if not applicable)
This is fully internal and should be further refactored to use `get_type_hints`
to resolve forward references and optional types formatted like BaseStore | None.
"""
VALID_KINDS = (inspect.Parameter.POSITIONAL_OR_KEYWORD, inspect.Parameter.KEYWORD_ONLY)
@@ -250,7 +258,6 @@ class RunnableCallable(Runnable):
trace: bool = True,
recurse: bool = True,
explode_args: bool = False,
func_accepts_config: bool | None = None,
**kwargs: Any,
) -> None:
self.name = name
@@ -277,31 +284,23 @@ class RunnableCallable(Runnable):
if func is None and afunc is None:
raise ValueError("At least one of func or afunc must be provided.")
if func_accepts_config is not None:
self.func_accepts_config = func_accepts_config
self.func_accepts: dict[str, tuple[str, Any]] = {}
else:
params = inspect.signature(cast(Callable, func or afunc)).parameters
self.func_accepts: dict[str, tuple[str, Any]] = {}
params = inspect.signature(cast(Callable, func or afunc)).parameters
self.func_accepts_config = "config" in params
# Mapping from kwarg name to (config key, default value) to be used.
# The default value is used if the config key is not found in the config.
self.func_accepts = {}
for kw, typ, runtime_key, default in KWARGS_CONFIG_KEYS:
p = params.get(kw)
for kw, typ, config_key, default in KWARGS_CONFIG_KEYS:
p = params.get(kw)
if p is None or p.kind not in VALID_KINDS:
# If parameter is not found or is not a valid kind, skip
continue
if p is None or p.kind not in VALID_KINDS:
# If parameter is not found or is not a valid kind, skip
continue
if typ != (ANY_TYPE,) and p.annotation not in typ:
# A specific type is required, but the function annotation does
# not match the expected type.
continue
if typ != (ANY_TYPE,) and p.annotation not in typ:
# A specific type is required, but the function annotation does
# not match the expected type.
continue
# If the kwarg is accepted by the function, store the default value
self.func_accepts[kw] = (config_key, default)
# If the kwarg is accepted by the function, store the key / runtime attribute to inject
self.func_accepts[kw] = (runtime_key, default)
def __repr__(self) -> str:
repr_args = {
@@ -328,25 +327,33 @@ class RunnableCallable(Runnable):
else:
args = (input,)
kwargs = {**self.kwargs, **kwargs}
if self.func_accepts_config:
kwargs["config"] = config
_conf = config[CONF]
for kw, (config_key, default_value) in self.func_accepts.items():
runtime = config[CONF].get(CONFIG_KEY_RUNTIME)
for kw, (runtime_key, default) in self.func_accepts.items():
# If the kwarg is already set, use the set value
if kw in kwargs:
continue
if (
# If the kwarg is requested, but isn't in the config AND has no
# default value, raise an error
config_key not in _conf and default_value is inspect.Parameter.empty
):
raise ValueError(
f"Missing required config key '{config_key}' for '{self.name}'."
)
kw_value: Any = MISSING
if kw == "config":
kw_value = config
elif runtime:
if kw == "runtime":
kw_value = runtime
else:
try:
kw_value = getattr(runtime, runtime_key)
except AttributeError:
pass
kwargs[kw] = _conf.get(config_key, default_value)
if kw_value is MISSING:
if default is inspect.Parameter.empty:
raise ValueError(
f"Missing required config key '{runtime_key}' for '{self.name}'."
)
kw_value = default
kwargs[kw] = kw_value
if self.trace:
callback_manager = get_callback_manager_for_config(config, self.tags)
@@ -392,23 +399,33 @@ class RunnableCallable(Runnable):
else:
args = (input,)
kwargs = {**self.kwargs, **kwargs}
if self.func_accepts_config:
kwargs["config"] = config
_conf = config[CONF]
for kw, (config_key, default_value) in self.func_accepts.items():
runtime = config[CONF].get(CONFIG_KEY_RUNTIME)
for kw, (runtime_key, default) in self.func_accepts.items():
# If the kwarg has already been set, use the set value
if kw in kwargs:
continue
if (
# If the kwarg is requested, but isn't in the config AND has no
# default value, raise an error
config_key not in _conf and default_value is inspect.Parameter.empty
):
raise ValueError(
f"Missing required config key '{config_key}' for '{self.name}'."
)
kwargs[kw] = _conf.get(config_key, default_value)
kw_value: Any = MISSING
if kw == "config":
kw_value = config
elif runtime:
if kw == "runtime":
kw_value = runtime
else:
try:
kw_value = getattr(runtime, runtime_key)
except AttributeError:
pass
if kw_value is MISSING:
if default is inspect.Parameter.empty:
raise ValueError(
f"Missing required config key '{runtime_key}' for '{self.name}'."
)
kw_value = default
kwargs[kw] = kw_value
if self.trace:
callback_manager = get_async_callback_manager_for_config(config, self.tags)
run_manager = await callback_manager.on_chain_start(
@@ -42,13 +42,13 @@ It can either be a `TypedDict`, `dataclass`, or Pydantic `BaseModel`.
Note: we cannot use either `TypedDict` or `dataclass` directly due to limitations in type checking.
"""
class Unset:
"""A sentinel value to represent an unset type."""
UNSET: Unset = Unset()
MISSING = object()
"""Unset sentinel value."""
class DeprecatedKwargs(TypedDict):
"""TypedDict to use for extra keyword arguments, enabling type checking warnings for deprecated arguments."""
EMPTY_SEQ: tuple[str, ...] = tuple()
"""An empty sequence of strings."""
+18 -6
View File
@@ -1,15 +1,27 @@
from langgraph.channels.any_value import AnyValue
from langgraph.channels.base import BaseChannel
from langgraph.channels.binop import BinaryOperatorAggregate
from langgraph.channels.ephemeral_value import EphemeralValue
from langgraph.channels.last_value import LastValue
from langgraph.channels.last_value import LastValue, LastValueAfterFinish
from langgraph.channels.named_barrier_value import (
NamedBarrierValue,
NamedBarrierValueAfterFinish,
)
from langgraph.channels.topic import Topic
from langgraph.channels.untracked_value import UntrackedValue
__all__ = [
__all__ = (
# base
"BaseChannel",
# value types
"AnyValue",
"LastValue",
"Topic",
"BinaryOperatorAggregate",
"LastValueAfterFinish",
"UntrackedValue",
"EphemeralValue",
"AnyValue",
]
"BinaryOperatorAggregate",
"NamedBarrierValue",
"NamedBarrierValueAfterFinish",
# topics
"Topic",
)
@@ -1,12 +1,16 @@
from __future__ import annotations
from collections.abc import Sequence
from typing import Any, Generic
from typing_extensions import Self
from langgraph._internal._typing import MISSING
from langgraph.channels.base import BaseChannel, Value
from langgraph.constants import MISSING
from langgraph.errors import EmptyChannelError
__all__ = ("AnyValue",)
class AnyValue(Generic[Value], BaseChannel[Value, Value, Value]):
"""Stores the last value received, assumes that if multiple values are
@@ -14,6 +18,8 @@ class AnyValue(Generic[Value], BaseChannel[Value, Value, Value]):
__slots__ = ("typ", "value")
value: Value | Any
def __init__(self, typ: Any, key: str = "") -> None:
super().__init__(typ, key)
self.value = MISSING

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