feat: planner scope management CLI commands

[alexzoo]

Summary

• Add CLI subcommands: assistagents planner-scope list|add|remove|reset
• Allow post-install management of planner's .md edit permissions without reinstall
• Add anchors in planner.md for in-place permission updates
• Add slash-command /planner-scope for build/dev agent

Changes

New files

• src/planner-scope.ts — core logic for scope management
• templates/commands/planner-scope.md — slash-command template

Modified files

• src/cli.ts — CLI routing for planner-scope subcommands
• templates/agents/build/planner.md — anchors for managed permissions

Tests

• tests/planner-scope.test.ts — unit tests (14 tests)
• tests/planner-scope-cli.test.ts — integration tests (11 tests)
• tests/agent-placeholders.test.ts — anchor verification (1 test)

Validation rules

Pattern	Without --force	With --force
docs/**.md	✅ Allowed	✅ Allowed
**/*.md	❌ Blocked (wide)	✅ Allowed + warning
/tmp/x.md	❌ Blocked (absolute)	❌ Blocked (always)
../x.md	❌ Blocked (..)	❌ Blocked (always)

Test plan

npm run typecheck  # OK
npm test           # 41/42 PASS (1 unrelated fail)
npm run build      # OK

Documentation

• Plan: ai-docs/dev-plans/2026-02-26-planner-scope-management.md
• Test report: ai-docs/reports/test-reports/2026-02-26-planner-scope-management.md
• Code review: ai-docs/reports/2026-02-26-planner-scope-code-review.md