docs(05-01): complete gsd-entity-generator plan

Tasks completed: 1/1
- Create gsd-entity-generator agent definition

SUMMARY: .planning/phases/05-subagent-codebase-analysis/05-01-SUMMARY.md

.planning/STATE.md

@@ -9,19 +9,19 @@ See: .planning/PROJECT.md (updated 2026-01-19)
 
 ## Current Position
 
-Phase: 4 of 4 (Semantic Intelligence & Scale)
-Plan: 5 of 5 complete
-Status: Phase complete
-Last activity: 2026-01-20 — Completed 04-05-PLAN.md (Intel Injection into Planner)
+Phase: 5 of 5 (Subagent Codebase Analysis)
+Plan: 1 of 2
+Status: In progress
+Last activity: 2026-01-20 — Completed 05-01-PLAN.md (gsd-entity-generator Agent Definition)
 
 Progress: [██████████] 100%
 
 ## Performance Metrics
 
 **Velocity:**
-- Total plans completed: 12
-- Average duration: 2.5 min
-- Total execution time: 30 min
+- Total plans completed: 13
+- Average duration: 2.4 min
+- Total execution time: 31 min
 
 **By Phase:**
 
@@ -31,6 +31,7 @@ Progress: [██████████] 100%
 | 2. Context Injection | 2/2 | 4 min | 2.0 min |
 | 3. Brownfield & Integration | 3/3 | 6 min | 2.0 min |
 | 4. Semantic Intelligence | 5/5 | 13 min | 2.6 min |
+| 5. Subagent Codebase Analysis | 1/2 | 1 min | 1.0 min |
 
 *Updated after each plan completion*
 
@@ -69,11 +70,16 @@ Progress: [██████████] 100%
 | Query routing before Write/Edit | 04-04 | Clean separation between query and indexing modes |
 | Intel read in Step 7 with others | 04-05 | Keep all context file reads in one place |
 | 2>/dev/null for missing intel | 04-05 | Graceful degradation when summary.md doesn't exist |
+| Skip existing entities by default | 05-01 | Prevents overwriting manual edits to entities |
 
 ### Pending Todos
 
 - `/gsd:resume-work` decimal phase handling (deferred from v1.8.0)
 
+### Roadmap Evolution
+
+- Phase 5 added: Subagent Codebase Analysis
+
 ### Blockers/Concerns
 
 - `.planning/` is gitignored in GSD repo - intel files created but not committed (expected for project-local data)
@@ -81,7 +87,7 @@ Progress: [██████████] 100%
 ## Session Continuity
 
 Last session: 2026-01-20
-Stopped at: Completed 04-05-PLAN.md (Intel Injection into Planner)
+Stopped at: Completed 05-01-PLAN.md (gsd-entity-generator Agent Definition)
 Resume file: None
 
 ## Phase Progress
@@ -91,9 +97,6 @@ Resume file: None
 - Phase 3: Brownfield & Integration ✓
 - Phase 4: Semantic Intelligence & Scale ✓
 
-**Phase 4 status:**
-- 04-01: SQLite graph layer ✓
-- 04-02: Query interface ✓
-- 04-03: Entity generation instructions ✓
-- 04-04: CLI query interface (gap closure) ✓
-- 04-05: Intel injection into planner ✓
+**Phase 5 status:**
+- 05-01: gsd-entity-generator agent definition ✓
+- 05-02: Integrate into analyze-codebase (pending)

.planning/phases/05-subagent-codebase-analysis/05-01-SUMMARY.md

@@ -0,0 +1,122 @@
+---
+phase: 05-subagent-codebase-analysis
+plan: 01
+title: gsd-entity-generator Agent Definition
+subsystem: agents
+tags: [subagent, entity-generation, semantic-analysis]
+
+dependency-graph:
+  requires:
+    - 04-03 (entity generation instructions)
+    - gsd-codebase-mapper.md (pattern reference)
+  provides:
+    - gsd-entity-generator subagent definition
+    - Entity template specification
+    - Type heuristics table
+  affects:
+    - 05-02 (analyze-codebase integration)
+    - Future entity generation workflows
+
+tech-stack:
+  added: []
+  patterns:
+    - Subagent direct-write pattern
+    - Statistics-only return pattern
+    - Wiki-link dependency notation
+
+key-files:
+  created:
+    - agents/gsd-entity-generator.md
+  modified: []
+
+decisions:
+  - id: skip-existing-entities
+    choice: Check for existing entity file before writing
+    rationale: Prevents overwriting manual edits to entities
+
+metrics:
+  duration: 1 min 13 sec
+  completed: 2026-01-20
+---
+
+# Phase 05 Plan 01: gsd-entity-generator Agent Definition Summary
+
+**One-liner:** Subagent definition for semantic entity generation with direct disk writes and statistics-only returns.
+
+## What Was Built
+
+Created `agents/gsd-entity-generator.md` following the established `gsd-codebase-mapper.md` pattern:
+
+**Agent structure:**
+- Frontmatter with name, description, tools (Read, Write, Bash), color
+- Role section explaining spawn context from `/gsd:analyze-codebase`
+- `<why_this_matters>` section explaining how entities feed the intelligence system
+- 3-step process: parse_file_list, process_each_file, return_statistics
+
+**Entity template specification:**
+- YAML frontmatter: path, type, updated, status
+- Sections: Purpose, Exports, Dependencies, Used By, Notes
+- Internal dependencies use [[wiki-links]] for graph edge creation
+- External dependencies as plain text
+
+**Type heuristics table:**
+| Type | Indicators |
+|------|-----------|
+| api | api/, routes/, endpoints/ |
+| component | components/, React/Vue exports |
+| util | utils/, lib/, helpers/ |
+| config | config/, *.config.* |
+| hook | hooks/, use* functions |
+| service | services/ |
+| model | models/, types/ |
+| test | *.test.*, *.spec.* |
+| module | default |
+
+**Wiki-link rules:**
+- Internal (starts with `.` or `@/`) -> convert to slug, wrap in [[brackets]]
+- External (package name) -> plain text, no brackets
+
+**Critical rules matching gsd-codebase-mapper:**
+- WRITE entities directly (never return contents)
+- PostToolUse hook syncs to graph.db automatically
+- Use EXACT template format (hook parses frontmatter + [[links]])
+- Skip existing entities (don't overwrite)
+- Return statistics only (~10 lines)
+
+## Tasks Completed
+
+| Task | Name | Commit | Key Files |
+|------|------|--------|-----------|
+| 1 | Create gsd-entity-generator agent definition | f4c5817 | agents/gsd-entity-generator.md |
+
+## Deviations from Plan
+
+None - plan executed exactly as written.
+
+## Decisions Made
+
+1. **Skip existing entities by default**
+   - Prevents accidental overwrite of manually edited entities
+   - Aligns with research recommendation in 05-RESEARCH.md
+   - Agent checks `ls .planning/intel/entities/{slug}.md` before writing
+
+## Verification Results
+
+- [x] File exists at `agents/gsd-entity-generator.md`
+- [x] Frontmatter valid YAML (name, description, tools, color)
+- [x] Role section explains subagent purpose
+- [x] Process has 3 steps: parse, process, return
+- [x] Entity template included in full
+- [x] Type heuristics table present
+- [x] Wiki-link rules specified
+- [x] Critical rules section matches gsd-codebase-mapper style
+- [x] Returns statistics only (not entity contents)
+
+## Next Phase Readiness
+
+**Prerequisites for 05-02:**
+- [x] gsd-entity-generator.md exists
+- [x] Agent follows expected patterns (direct write, stats return)
+- [x] Entity template matches what PostToolUse hook expects
+
+**Ready for:** Integration into `/gsd:analyze-codebase` command (Plan 05-02)