docs: limit chat announcements to collab/{questions,proposals,plan}; update AGENTS.md and SeedPrompt.md; log in devlog

AGENTS.md

@@ -53,3 +53,5 @@ Scope: Applies to the entire repository unless overridden by a deeper AGENTS.md.
 - Do not paste diffs or file contents in chat; write to files instead.
 - Aggregate multiple updates in a short bulleted list of filepaths.
 - Push detailed reasoning/status to `docs/devlog/` and reference it when needed.
+- Only announce changes to collaboration files: `collab/questions/`, `collab/proposals/`, and `collab/plan/`.
+- For all other changes (docs, code, configs), skip chat announcements and log in DevLog.

SeedPrompt.md

@@ -75,3 +75,4 @@ Commit/push everything in the repo now before we get started on the project.
 - Limit chat to five lines or fewer; avoid explanations in chat.
 - Never paste diffs or large content in chat; commit to files and reference paths.
 - Log detail in `docs/devlog/` and keep the chat terminal clean.
+- Only announce updates for `collab/questions/`, `collab/proposals/`, and `collab/plan/` files. All other updates go to DevLog without chat noise.

docs/devlog/DEVLOG_LLM.md

@@ -53,3 +53,10 @@ This log is concise and structured for quick machine parsing and summarization.
   - Added Chat Output Policy to AGENTS.md and SeedPrompt.md (five-line max; default message format; no diffs in chat)
 - next:
   - Use filesystem-first workflow; keep chat to update notices
+
+## 2025-09-17T15:12Z
+- context: Refined chat announcements scope
+- actions:
+  - Limited chat announcements to collab/questions, collab/proposals, collab/plan only
+- next:
+  - Announce only those; log everything else here