cc-os/openspec/changes/add-os-status-plugin/tasks.md

Tasks: add-os-status-plugin

1. Plugin scaffold

• 1.1 Create plugins/os-status/ with .claude-plugin/plugin.json (name os-status, per naming convention; no name: in any SKILL.md — no skills in this change anyway)
• 1.2 Add hooks/hooks.json registering SessionStart → session_start.py via ${CLAUDE_PLUGIN_ROOT} (5s timeout, matching os-adr's pattern)
• 1.3 Write shared modules in Sandi-Metz-lean Python matching os-vault's style: hooks/checks.py (CheckResult, registry, the three checks), hooks/state.py (.cc-os/ snooze/suppress, git-project detection), thin hooks/session_start.py entry point (run checks, aggregate, print)

2. Checks

• 2.1 subagent_model_env_override: env var + ~/.claude/settings.json env block scan; runs outside git projects too
• 2.2 adr_system_present: port logic from plugins/os-adr/hooks/session_start.py — PRESENT_NOTE wording byte-identical (copy, don't paraphrase); absent-path once-per-day snooze honoring existing .os-adr/suppress
• 2.3 vault_hub_note_present: config-first hub lookup (.cc-os/config hub slug), else project/<name> facet-tag scan of the vault; missing → warn naming the corrective skill

3. Tests + invariants

• 3.1 tests/hook_test.py-style model-free Python tests: contract (ok/note/warn routing, failure isolation, exit-0 envelope), each check against fixture dirs/fake settings.json, snooze/suppress state transitions, non-git-cwd behavior
• 3.2 invariants.md: single-banner, note-not-suppressed, exit-0-always, state-only-in-.cc-os, PRESENT_NOTE byte-identical to os-adr's tuned wording

4. os-adr cutover (atomic)

• 4.1 Remove the SessionStart entry from plugins/os-adr/hooks/hooks.json (keep the script file until archive; it is the wording source of record for 2.2)
• 4.2 Confirm os-adr's tests still pass (hook_test.py may need pruning of SessionStart-registration assertions)

5. Install + verify

• 5.1 Add os-status to ~/.claude/plugins/.claude-plugin/marketplace.json; claude plugin marketplace update local-plugins; claude plugin install os-status@local-plugins
• 5.2 bin/refresh-plugins; claude plugin details os-status@local-plugins (hook registered) and claude plugin details os-adr@local-plugins (SessionStart gone from resolved cache)
• 5.3 Fresh-session smoke test in cc-os (expect: ADR note once, hub-note ok once hub exists, no env warn) and in a project without docs/adr/ (expect: one banner)
• 5.4 Regression canary: export CLAUDE_CODE_SUBAGENT_MODEL=haiku in a test shell, fresh session, expect the override warn

6. Documentation

• 6.1 ADR in docs/memory-system/03-architecture-decisions.md: status-check convention, in-process code-location decision (Options A/B rejected with the perspective-review reasoning), deferred items (context field, state-dir consolidation, Phase 2)
• 6.2 Update cc-os CLAUDE.md: Implemented Components entry for os-status; note os-adr's SessionStart behavior moved
• 6.3 Mark WS3 plan doc (docs/plans/ws3-status-convention-plugin.md) as superseded by this change (pointer, status line)