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

extensions/rpiv-pi/skills/write-test-cases/templates/regression-suite.md

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+```markdown
+# {Feature Name} — Regression Suite
+
+## Overview
+- Feature: {feature name}
+- Module: {module abbreviation}
+- Total test cases: {N}
+- Estimated execution: ~{X} minutes
+- Last updated: {YYYY-MM-DD}
+- Commit: {commit-hash}
+
+## Smoke Test Subset
+{Minimum set of TCs that cover critical paths — run these for quick sanity checks}
+
+| Priority | TC ID | Title | Est. Time |
+|----------|-------|-------|-----------|
+| high | TC-{MOD}-{NNN} | {title} | ~{N}m |
+
+**Smoke total: ~{X} minutes**
+
+## Full Regression
+
+### High Priority
+| TC ID | Title | Type | Est. Time |
+|-------|-------|------|-----------|
+| TC-{MOD}-{NNN} | {title} | {type} | ~{N}m |
+
+### Medium Priority
+| TC ID | Title | Type | Est. Time |
+|-------|-------|------|-----------|
+| TC-{MOD}-{NNN} | {title} | {type} | ~{N}m |
+
+### Low Priority
+| TC ID | Title | Type | Est. Time |
+|-------|-------|------|-----------|
+| TC-{MOD}-{NNN} | {title} | {type} | ~{N}m |
+
+**Full regression total: ~{X} minutes**
+
+## Coverage Map
+{Which areas of the feature each TC exercises}
+
+| Area | TCs Covering |
+|------|-------------|
+| {sub-area} | TC-{MOD}-001, TC-{MOD}-003 |
+
+## Gaps
+{Areas of the feature NOT covered by any test case — flagged for future work}
+- {uncovered area — reason}
+```
+
+**Smoke test subset** picks TCs that cover the highest-risk paths in minimum time. Typically 2-4 TCs per feature. A QA tester should be able to run the smoke suite in under 15 minutes.
+
+**Execution time estimates** based on step count:
+- Simple flow (3-5 steps): ~3 minutes
+- Medium flow (6-10 steps): ~5 minutes
+- Complex flow (11+ steps): ~8-10 minutes
+
+**Coverage map** cross-references TCs against feature sub-areas. Helps QA identify which TCs to re-run when a specific area changes. Sub-areas are derived from Web Layer entry points discovered during analysis.
+
+**Gaps section** flags areas the skill identified but chose not to generate TCs for — either explicitly excluded during checkpoint or insufficient code detail for generation.
+
+**Commit** tracks which code version was analyzed. Compare against current HEAD to detect when regression suite may be stale.