/gsd-map-codebase

name: gsd-map-codebase
description: "Use when onboarding to an unfamiliar codebase, before a major refactor, on a brownfield project before /gsd-new-project, or to refresh .planning/codebase/. Spawns up to 4 parallel mapper agents that write 7 documents."
argument-hint: "[optional: specific area to map, e.g., 'api' or 'auth']"
allowed-tools:
  - Read
  - Bash
  - Glob
  - Grep
  - Write
  - Task

<objective> Analyze existing codebase using parallel gsd-codebase-mapper agents to produce structured codebase documents.

Each mapper agent explores a focus area and **writes documents directly** to `.planning/codebase/`. The orchestrator only receives confirmations, keeping context usage minimal.

Output: .planning/codebase/ folder with 7 structured documents about the codebase state. </objective>

<execution_context> @$HOME/.claude/get-shit-done/workflows/map-codebase.md </execution_context>

<context> Focus area: $ARGUMENTS (optional - if provided, tells agents to focus on specific subsystem)

**Load project state if exists:** Check for .planning/STATE.md - loads context if project already initialized

**This command can run:**

• Before /gsd-new-project (brownfield codebases) - creates codebase map first
• After /gsd-new-project (greenfield codebases) - updates codebase map as code evolves
• Anytime to refresh codebase understanding

</context>

<when_to_use> **Use map-codebase for:**

• Brownfield projects before initialization (understand existing code first)
• Refreshing codebase map after significant changes
• Onboarding to an unfamiliar codebase
• Before major refactoring (understand current state)
• When STATE.md references outdated codebase info

**Skip map-codebase for:**

• Greenfield projects with no code yet (nothing to map)
• Trivial codebases (<5 files)

</when_to_use>

<process> 1. Check if .planning/codebase/ already exists (offer to refresh or skip) 2. Create .planning/codebase/ directory structure 3. Spawn 4 parallel gsd-codebase-mapper agents:

• Agent 1: tech focus → writes STACK.md, INTEGRATIONS.md
• Agent 2: arch focus → writes ARCHITECTURE.md, STRUCTURE.md
• Agent 3: quality focus → writes CONVENTIONS.md, TESTING.md
• Agent 4: concerns focus → writes CONCERNS.md

4. Wait for agents to complete, collect confirmations (NOT document contents) 5. Verify all 7 documents exist with line counts 6. Commit codebase map 7. Offer next steps (typically: /gsd-new-project or /gsd-plan-phase) </process>

<success_criteria>

• [ ] .planning/codebase/ directory created
• [ ] All 7 codebase documents written by mapper agents
• [ ] Documents follow template structure
• [ ] Parallel agents completed without errors
• [ ] User knows next steps

</success_criteria>