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ciregenzandClaude Fable 5.1
383c04b0e2
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_012G8kyALnPjsA7aJFmMBq3R
69 lines
3.6 KiB
Python
69 lines
3.6 KiB
Python
"""The recap's tool trail must be bounded whatever the chat's length.
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Aging kept one line per tool call forever. Eric's real Recall Radar chat (766 tool calls) rebuilt
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with a 311,990-char / 97,923-token recap, so its first request was 192,056 tokens against a 180,000
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trigger: the CLI compacted before the second tool call, the window refilled, and the chat died of
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"Autocompact is thrashing" five times on exp.5 and again, identically, on exp.3 (2026-09-01)."""
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from backend.apps.agents.core.models import Message
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from backend.apps.agents.manager.session.history_compaction import (
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RECAP_STUB_MAX_CHARS, RECAP_TRAIL_MAX_CHARS, bound_trail, build_history_prefix, trail_lines,
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)
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def p_long_chat(calls: int):
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msgs = [Message(role="user", content="Build the recall app, for real.", branch_id="main")]
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for i in range(calls):
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tool = "Bash" if i % 3 else "Read"
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msgs.append(Message(role="tool_call", content={"tool": tool, "input": {"command": f"step {i} " + "x" * 120}}, branch_id="main"))
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msgs.append(Message(role="tool_result", content={"tool_name": tool, "text": f"result {i} " + "y" * 300}, branch_id="main"))
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if i % 100 == 99:
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msgs.append(Message(role="user", content=f"checkpoint ask {i}", branch_id="main"))
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msgs.append(Message(role="user", content="what's the progress?", branch_id="main"))
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return msgs
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def test_an_800_call_chat_rebuilds_under_the_budget_and_says_what_it_dropped():
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lines = trail_lines(p_long_chat(800))
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p_tool = [l for l in lines if l.startswith("Tool ")]
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assert sum(len(l) + 1 for l in p_tool) <= RECAP_TRAIL_MAX_CHARS + RECAP_STUB_MAX_CHARS, "full tier plus stub tier is the whole tool budget"
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p_fold = [l for l in lines if "earlier tool calls are not shown" in l]
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assert len(p_fold) == 1, "exactly one counted fold line"
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assert "Bash" in p_fold[0] and "Read" in p_fold[0], "the fold names what it dropped, by tool"
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assert lines.index(p_fold[0]) < lines.index(p_tool[0]), "the fold sits where the dropped span was, before the kept tail"
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def test_every_ask_survives_and_the_newest_calls_stay_verbatim():
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msgs = p_long_chat(800)
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lines = trail_lines(msgs)
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asks = [l for l in lines if l.startswith("The user asked")]
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assert len(asks) == 1 + 8 + 1, "no ask is ever folded"
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assert any("step 799 " in l for l in lines), "the newest call is verbatim"
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assert any("result 799 " in l for l in lines), "the newest result is verbatim"
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assert not any("step 5 " in l for l in lines), "the oldest call is folded away"
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def test_a_short_chat_is_untouched():
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msgs = p_long_chat(20)
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lines = trail_lines(msgs)
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assert not any("not shown" in l for l in lines)
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assert sum(1 for l in lines if l.startswith("Tool call")) == 20
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def test_the_whole_prefix_is_bounded_for_the_real_shape():
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out = build_history_prefix(p_long_chat(766))
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assert len(out) < RECAP_TRAIL_MAX_CHARS + RECAP_STUB_MAX_CHARS + 8_000, f"prefix is {len(out)} chars; the frame plus a bounded trail"
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def test_the_middle_tier_keeps_bare_rerunnable_stubs_and_no_result_lines():
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lines = trail_lines(p_long_chat(800))
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p_first_full = next(i for i, l in enumerate(lines) if l.startswith("Tool result"))
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p_stubs = [l for l in lines[:p_first_full] if l.startswith("Tool call")]
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assert p_stubs, "an 800-call chat has a middle tier of bare stubs"
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assert all(len(l) <= 120 for l in p_stubs)
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assert not any(l.startswith("Tool result") for l in lines[:p_first_full])
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def test_bound_trail_is_a_no_op_under_budget():
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lines = ["The user asked: a", "Tool call: Read(x)", "Tool result (Read): ok"]
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assert bound_trail(lines, 10_000) == lines
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