feat: decision lifecycle management and archival system

.ai-team/agents/fenster/history.md

@@ -142,3 +142,5 @@ _Summarized from initial architecture review (2026-02-07). Full entries in `hist
 
 - **CLI dual-path support for .squad/ migration (#101, 2026-02-19).** Implemented backward-compatible directory detection for the .squad/ → .ai-team/ rename in v0.5.0. Key components: (1) detectSquadDir() checks .squad/ first, falls back to .ai-team/; (2) New installations create .squad/, existing installations continue using .ai-team/ until manually migrated; (3) `squad upgrade --migrate-directory` renames the directory and updates .gitattributes/.gitignore; (4) Deprecation warning shown only when .ai-team/ is detected (not on new installs); (5) All directory references updated to use squadInfo.path instead of hardcoded paths. Critical lessons: (a) Function declaration order matters — helpers must be defined before use, (b) Dual const declaration causes immediate syntax error — careful with refactoring across edit sessions, (c) Default return value in detectSquadDir determines new-install behavior — returning .ai-team/ was a subtle bug that took manual testing to catch. All 53 tests pass. PR #111 to dev branch.
 
+
+📌 Team update (2026-02-20): Kobayashi merged all 5 v0.5.0 PRs (#109–#113) into dev in dependency order. All tests pass (53/53). Migration infrastructure (dual-path CLI/workflows, email scrubbing, docs) ready for v0.5.0 release. — Scribe

.ai-team/agents/keaton/history.md

@@ -491,3 +491,5 @@ Brady's "forward-only" philosophy is correct for this stage of product maturity.
 📌 Team update (2026-02-18): Insider Program — Binary Model (consolidated). Feb 16 proposed ring-based progression (Ring 0→1→Stable, 30 cap); Feb 17 Brady directive simplified to binary model (insider or release, no caps/tiers). Consolidated both decisions into single design block: honor system access, .squad-insider/ state isolation, 0.5.0-insider+{commit} version ID, branch-based installation. No formal entry pathways, no governance structure, no capacity caps. — decided by Keaton + McManus (original) → Keaton (simplified)
 
 📌 Team update (2026-02-19): Insider Program infrastructure verified and complete — Issue #94 all checklist items verified: CI/CD triggers, guard protection, insider release workflow, documentation, CLI help text. All 11 workflow templates in sync. Ready for Brady to create insider branch. — decided by Kobayashi
+
+📌 Team update (2026-02-20): Kobayashi merged all 5 v0.5.0 PRs (#109–#113) into dev in dependency order. All tests pass (53/53). Migration infrastructure (dual-path CLI/workflows, email scrubbing, docs) ready for v0.5.0 release. — Scribe

.ai-team/agents/scribe/charter.md

@@ -46,13 +46,22 @@ After every substantial work session:
      f. Remove the original overlapping blocks.
    - Write the updated file back. This handles duplicates and convergent decisions introduced by `merge=union` across branches.
 
-4. **Propagate cross-agent updates:**
+4. **Archive old decisions (`decision-management` skill):**
+   Run the `decision-management` skill during every session:
+   - Read `.ai-team/decisions.md` — if over 400 lines, archive eligible blocks
+   - Eligible: older than 30 days AND not marked `status: permanent`
+   - Archive to `.ai-team/decisions/archive/{YYYY-QX}.md`
+   - Add condensed summaries for archived policy decisions (see skill for format)
+   - Target: keep `decisions.md` under 400 lines at all times
+   - Full instructions: `.ai-team/skills/decision-management/SKILL.md`
+
+5. **Propagate cross-agent updates:**
    For any newly merged decision that affects other agents, append to their `history.md`:
    ```
    📌 Team update ({date}): {summary} — decided by {Name}
    ```
 
-5. **Commit `.ai-team/` changes:**
+6. **Commit `.ai-team/` changes:**
    **IMPORTANT — Windows compatibility:** Do NOT use `git -C {path}` (unreliable with Windows paths).
    Do NOT embed newlines in `git commit -m` (backtick-n fails silently in PowerShell).
    Instead:
@@ -82,17 +91,20 @@ After every substantial work session:
    - **Verify the commit landed:** Run `git log --oneline -1` and confirm the
      output matches the expected message. If it doesn't, report the error.
 
-6. **Never speak to the user.** Never appear in responses. Work silently.
+7. **Never speak to the user.** Never appear in responses. Work silently.
 
 ## The Memory Architecture
 
 ```
 .ai-team/
 ├── decisions.md          # Shared brain — all agents read this (merged by Scribe)
 ├── decisions/
-│   └── inbox/            # Drop-box — agents write decisions here in parallel
-│       ├── keaton-architecture.md
-│       └── verbal-agent-design.md
+│   ├── inbox/            # Drop-box — agents write decisions here in parallel
+│   │   ├── keaton-architecture.md
+│   │   └── verbal-agent-design.md
+│   └── archive/          # Quarterly archives — old decisions moved here by Scribe
+│       ├── 2026-Q1.md
+│       └── README.md
 ├── orchestration-log/    # Per-spawn log entries
 │   ├── 2026-02-07T23-18-keaton.md
 │   └── 2026-02-07T23-18-verbal.md