/map-codebase

name: gsd:map-codebase
description: Analyze codebase with parallel mapper agents to produce .planning/codebase/ documents
argument-hint: "[--fast [--focus tech|arch|quality|concerns]] [--query <term>|status|diff|refresh] [area]"
allowed-tools:
  - Read
  - Bash
  - Glob
  - Grep
  - Write
  - Agent
requires: [config, new-project, plan-phase, onboard]

<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> @~/.claude/gsd-core/workflows/map-codebase.md </execution_context>

<flags>

• **--fast**: Lightweight scan mode — spawns one mapper agent instead of four. Accepts an optional `--focus` value: `tech`, `arch`, `quality`, `concerns`, or `tech+arch` (default). Faster and lower-context than the full map.
• **--query**: Codebase intelligence query mode. Sub-commands: `query <term>`, `status`, `diff`, `refresh`. Requires intel to be enabled in config (`intel.enabled: true`). Runs inline for query/status/diff; spawns an agent for refresh.
• **(no flag)**: Full parallel map — spawns 4 mapper agents to produce all 7 codebase documents.

</flags>

<context> Arguments: $ARGUMENTS

Parse the first token of $ARGUMENTS:

• If it is `--fast`: strip the flag, then read and execute `~/.claude/gsd-core/workflows/scan.md` (passing remaining args including optional --focus). Load it on demand here — it is deliberately not in `<execution_context>`, so the common full-map path does not pay for it.
• If it is `--query`: strip the flag, run the intel workflow (passing remaining args as the subcommand).
• Otherwise: pass all of $ARGUMENTS as focus area to the map-codebase workflow.

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

**This command can run:**

• Via /gsd:onboard for first-time brownfield setup - 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
• Refreshing or deepening an onboarded codebase map
• 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:onboard, /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>