Add 5 pi extensions: pi-subagents, pi-crew, rpiv-pi, pi-interactive-shell, pi-intercom

extensions/rpiv-pi/skills/outline-test-cases/templates/feature-meta.md

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+```markdown
+---
+date: {YYYY-MM-DD}
+author: {User from injected git context}
+commit: {commit-hash}
+branch: {Current branch name}
+repository: {Repository name}
+topic: "{Feature Name}"
+tags: [test-cases, outline, {module}, {feature-slug}]
+status: pending | partial | generated
+feature: "{Feature Name}"
+module: {MOD}
+portal: {Portal Name}
+slug: {feature-slug}
+tc_count: 0
+last_updated: {YYYY-MM-DD}
+last_updated_by: {User from injected git context}
+---
+
+## Routes
+- `{route path}` — {ComponentName}
+
+## Endpoints
+- `{HTTP method} {path}` — {description}
+
+## Scope Decisions
+- {What's in scope and why}
+- {What's OUT of scope and why}
+
+## Domain Context
+- {Business rules, intentional behaviors, known limitations}
+
+## Test Data Requirements
+- {Minimum data conditions for testing this feature}
+
+## Checkpoint History
+### {YYYY-MM-DD}
+**Q: {Question asked during checkpoint}**
+A: {Developer's answer}
+```
+
+**Notes on `_meta.md` content:**
+- Routes come from route discovery findings — path and component name only, no file:line
+- Endpoints come from backend discovery, filtered to those serving this feature
+- Scope Decisions, Domain Context, and Test Data Requirements come from checkpoint answers
+- Checkpoint History records dated Q&A pairs from developer checkpoints
+- If a feature has no frontend routes (e.g., widget), list the component entry point instead
+- If status is "partial", add an `## Existing Test Cases` section listing TC IDs found by the test-case-locator agent
+- commit records which commit was analyzed during outline generation — used for staleness detection by consuming skills
+- tc_count starts at 0 and is updated by write-test-cases when TCs are created

extensions/rpiv-pi/skills/outline-test-cases/templates/outline-readme.md

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+```markdown
+# {Project Name} — Test Case Outline
+
+## Overview
+- Project: {project name}
+- Framework: {framework}
+- Applications: {N} ({app names})
+- Total features: {N} outlined
+- Backend endpoints: ~{N} across {M} controllers
+- Last updated: {YYYY-MM-DD} | Branch: `{branch}` | Commit: `{commit}`
+
+## Features by Portal
+
+### {Portal Name} ({N} features)
+| # | Feature | Module | Slug | Routes | Endpoints | Status |
+|---|---------|--------|------|--------|-----------|--------|
+| 1 | {name} | {MOD} | {slug} | {N} | {M} | pending |
+
+## Backend-Only Endpoints (no frontend exposure)
+- **{Group name}** ({N} controllers, ~{M} endpoints) — {reason}
+
+## Next Steps
+Generate test cases for a specific feature:
+```
+/skill:write-test-cases {feature-name}
+```
+
+To update this outline after codebase changes:
+```
+/skill:outline-test-cases
+```
+Incremental runs detect existing outlines and take faster paths.
+
+## Coverage
+This outline was generated by static code analysis. It may not capture dynamically loaded features, features behind feature flags, or functionality added after the generation date. Re-run `outline-test-cases` periodically or add features manually.
+```