chore: update workspace state and memory

- Update workspace state timestamp
- Add weekly summary to MEMORY.md (removing duplicate entry)

memory/aitbc1/2026-03-15-13.md

@@ -0,0 +1,32 @@
+# Memory - 2026-03-15 13:00–13:59 UTC (aitbc1)
+
+## Session Start
+
+- Followed AGENTS.md: read SOUL.md, USER.md, memory/2026-03-15.md (yesterday), MEMORY.md (long-term)
+- Already aware of project state: CLI fixed, Brother Chain running, PRs open (#5, #6, #10, #11, #12)
+- Confirmed Gitea API token works; repository has open issues (all claimed)
+- Implemented advanced coordination patterns per user guidance:
+  - Repository memory layer (`ai-memory/` with architecture, bug-patterns, playbook, agent-notes)
+  - Task economy and claim system (`scripts/claim-task.py`)
+  - Stability rings in auto-review (`scripts/monitor-prs.py`)
+  - Shared planning (`ai-memory/plan.md`)
+- Opened PR #12 for infrastructure
+- Updated MEMORY.md and daily memory (note: switching to hourly files now)
+
+## System State
+
+- All open issues claimed (0 unassigned)
+- PRs open: #5 (tests-core), #6 (agent-sdk README), #10 (fix-imports-docs), #11 (sibling tests), #12 (infrastructure)
+- Coordination scripts active via cron (with jitter)
+- Gitea API rate limits not an issue; polling optimized
+
+## Decisions
+
+- Use hourly memory files per agent to avoid edit conflicts
+- Maintain English-only repository communication
+- Keep PR-only workflow; direct pushes disallowed
+
+## Notes
+
+- Per user: Path A for sibling's ai-memory PR: branch `aitbc/ai-memory-docs`, PR #14, request review from aitbc1
+- Ready to review sibling PRs when they appear; monitor auto-approves Ring 1+ changes, flags Ring 0 for manual