feat: Implement Mattermost sync functionality and enhance workspace context management

ai/AGENTS.md

@@ -62,6 +62,9 @@ When drafting messages for Jeff:
 
 - Treat workspace files as persistent memory, not just reference notes
 - Before answering prompts about current work, verify `ai/state/current.md` and the latest relevant log in `ai/logs/`
+- If `ai/inbox/mattermost-latest.md` exists, check it before answering prompts about current status, standups, or supervisor communication
+- If a Mattermost sync or other context-ingestion step fails, do not update `ai/logs/`, `ai/state/`, or stable context files based on that failure
+- Do not record missing dependencies, failed sync attempts, or missing inbox files as project facts unless the user explicitly asks to track the operational issue
 - When the user shares relevant new information, update today's log if the information belongs to the daily record
 - When the user corrects or changes stable context, update the canonical file directly:
   - `ai/state/current.md` for current focus or active concerns
@@ -79,7 +82,7 @@ For day-to-day prompts in this workspace:
 
 1. Verify the latest relevant context.
 2. Decide whether the prompt introduces new durable information.
-3. Update the workspace when needed.
+3. Update the workspace when needed, but never from a failed sync or failed tool run.
 4. Then answer using the refreshed context.
 
 ---

ai/inbox/.gitkeep

@@ -0,0 +1 @@
+

ai/inbox/README.md

@@ -0,0 +1,11 @@
+# Mattermost Inbox
+
+This directory stores raw or semi-processed communication captured from Mattermost before it is promoted into the persistent workspace context.
+
+Recommended usage:
+
+- `mattermost-latest.md` contains the most recent capture
+- timestamped snapshots can be stored here if needed
+- durable facts should be promoted into `ai/logs/`, `ai/state/`, or `ai/context/`
+
+This directory is intentionally treated as an inbox, not as the final source of truth.