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

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+---
+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)