fix(opencode): don't crash the whole session when plugins/lib is missing (#2538)

* fix(opencode): don't crash the whole session when plugins/lib is missing (#2530)

* fix: address review feedback (trailing newlines, symptom wording)

* fix(opencode): also lazy-load the store in ecc-hooks.ts plugin entrypoint

* test(opencode): add regression coverage for missing/present plugins/lib in ecc-hooks

* fix(opencode): guard diagnostic log() against unhandled rejection; tighten test assertion

* fix(opencode): only publish store after init succeeds; scrub loader errors from warning; catch sync log throws

* fix(opencode): scrub raw loader error from changed-files tool; add tool-level regression tests

* fix(ci): make OpenCode checks cross-platform

---------

Co-authored-by: haelyra <49814733+haelyra@users.noreply.github.com>

.opencode/tools/changed-files.ts

@@ -1,11 +1,5 @@
 import { tool, type ToolDefinition } from "@opencode-ai/plugin/tool"
-import {
-  buildTree,
-  getChangedPaths,
-  hasChanges,
-  type ChangeType,
-  type TreeNode,
-} from "../plugins/lib/changed-files-store.js"
+import type { ChangeType, TreeNode } from "../plugins/lib/changed-files-store.js"
 
 const INDICATORS: Record<ChangeType, string> = {
   added: "+",
@@ -26,6 +20,32 @@ function renderTree(nodes: TreeNode[], indent: string): string {
   return lines.join("\n")
 }
 
+// Loaded lazily (instead of via a top-level import) so that a missing or
+// partially-installed `~/.opencode/plugins` directory only breaks this one
+// tool when it's actually invoked, rather than throwing during module
+// evaluation. `tools/index.ts` re-exports every tool from a single barrel
+// file, so a static import failure here previously took down the entire
+// tools module -- and with it, the whole OpenCode session -- on the very
+// first tool-loading pass (see #2530).
+type ChangedFilesStore = typeof import("../plugins/lib/changed-files-store.js")
+let changedFilesStorePromise: Promise<ChangedFilesStore> | undefined
+
+async function loadChangedFilesStore(): Promise<ChangedFilesStore> {
+  if (!changedFilesStorePromise) {
+    changedFilesStorePromise = import("../plugins/lib/changed-files-store.js").catch(() => {
+      changedFilesStorePromise = undefined
+      throw new Error(
+        "changed-files tool: could not load the changed-files store. " +
+          "This usually means the ~/.opencode/plugins directory is missing or incomplete " +
+          "(an interrupted or partial ECC install can leave tools/ populated without plugins/). " +
+          "Run `node scripts/repair.js --target opencode` (or `ecc repair --target opencode`) " +
+          "from the ECC repo to restore the missing files."
+      )
+    })
+  }
+  return changedFilesStorePromise
+}
+
 const changedFilesTool: ToolDefinition = tool({
   description:
     "List files changed by agents in this session as a navigable tree. Shows added (+), modified (~), and deleted (-) indicators. Use filter to show only specific change types. Returns paths for git diff.",
@@ -40,6 +60,7 @@ const changedFilesTool: ToolDefinition = tool({
       .describe("Output format: tree for terminal display, json for structured data (default: tree)"),
   },
   async execute(args, context) {
+    const { buildTree, getChangedPaths, hasChanges } = await loadChangedFilesStore()
     const filter = args.filter === "all" || !args.filter ? undefined : (args.filter as ChangeType)
     const format = args.format ?? "tree"