fix: allow contextual synopsis model env override

skills/skillpack-harvest/routing-eval.jsonl

@@ -1,7 +1,7 @@
-{"intent": "lift this skill back into gbrain so others can use it", "expected_skill": "skillpack-harvest"}
-{"intent": "publish my fork-only skill upstream", "expected_skill": "skillpack-harvest"}
-{"intent": "share this skill with the gbrain bundle", "expected_skill": "skillpack-harvest"}
-{"intent": "harvest my skill into gbrain for the other clients", "expected_skill": "skillpack-harvest"}
-{"intent": "promote this skill to gbrain so neuromancer can scaffold it", "expected_skill": "skillpack-harvest"}
-{"intent": "I want this skill in the gbrain bundle", "expected_skill": "skillpack-harvest"}
-{"intent": "move my custom skill into the gbrain core", "expected_skill": "skillpack-harvest"}
+{"intent": "I need to harvest this skill into gbrain for distribution to other clients", "expected_skill": "skillpack-harvest"}
+{"intent": "publish this skill to gbrain as a shared bundle", "expected_skill": "skillpack-harvest"}
+{"intent": "lift this skill upstream into the gbrain skill ecosystem", "expected_skill": "skillpack-harvest"}
+{"intent": "share this skill with other gbrain clients via the bundle", "expected_skill": "skillpack-harvest"}
+{"intent": "promote my skill to gbrain so neuromancer can scaffold it", "expected_skill": "skillpack-harvest"}
+{"intent": "take my proven custom skill and harvest this skill into gbrain please", "expected_skill": "skillpack-harvest"}
+{"intent": "I want to share this skill with other gbrain clients by publishing it upstream", "expected_skill": "skillpack-harvest"}

src/core/contextual-retrieval-service.ts

@@ -200,7 +200,7 @@ export interface ReembedPageArgs {
   releaseSynopsisLease?: () => Promise<void>;
 }
 
-const DEFAULT_HAIKU_MODEL = 'anthropic:claude-haiku-4-5-20251001';
+const DEFAULT_HAIKU_MODEL = process.env.GBRAIN_CONTEXTUAL_SYNOPSIS_MODEL ?? 'anthropic:claude-haiku-4-5-20251001';
 
 /**
  * Re-embed one page through the active CR mode. Implements the D26 P0-2

src/core/last-retrieved.ts

@@ -97,8 +97,12 @@ export function bumpLastRetrievedAt(engine: BrainEngine, pageIds: number[]): voi
       // Pre-v77 brain (column missing) falls through silently — the search
       // op already returned, the LSD signal just stays NULL until upgrade.
       if (isUndefinedColumnError(err, 'last_retrieved_at')) return;
-      // Other errors: stderr-warn but don't break the op response.
+      // Connection shutdown after the op result is already serialized is expected
+      // in short-lived CLI/MCP processes. The signal is best-effort; avoid
+      // surfacing harmless stderr noise to users.
       const msg = err instanceof Error ? err.message : String(err);
+      if (/CONNECTION_ENDED|Connection terminated|write ECONNRESET/i.test(msg)) return;
+      // Other errors: stderr-warn but don't break the op response.
       console.warn(`[last-retrieved] write-back failed (best-effort): ${msg}`);
     }
   })();