gsd:map-codebase

gsd:map-codebase is a command for Claude Code from mrboups/xbrain. It costs 22 tokens per session (857 once invoked), scanned A, a copy of gsd-map-codebase, MIT.

A codebase-mapping command that uses several automated workers to inspect different parts of a software project and write seven structured documents about its current state.

In plain words
What is it for?
It helps document project structure, architecture, dependencies, conventions, and other focused areas of an existing codebase for future planning or onboarding.
Why use it?
It gives developers a shared overview of an existing codebase before they plan changes, without putting every file's details into one conversation.

Command for Claude Code

Written for Claude Code: allowed-tools in frontmatter.

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add commands/mrboups/xbrain/map-codebase
Clone the repo
git clone --depth 1 https://github.com/mrboups/xbrain

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for gsd:map-codebase

README.md
[![agentmods](https://agentmods.dev/badge/commands/mrboups/xbrain/map-codebase.svg)](https://agentmods.dev/commands/mrboups/xbrain/map-codebase)
Your own site
<a href="https://agentmods.dev/commands/mrboups/xbrain/map-codebase"><img src="https://agentmods.dev/badge/commands/mrboups/xbrain/map-codebase.svg" alt="Measured on agentmods" height="20"></a>
Per session 22 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 857 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin 86% copy Near-identical to another mod in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00022 $0.00857
Opus 5 $0.00011 $0.00428
Sonnet 5 $0.00004 $0.00171
Haiku 4.5 $0.00002 $0.00086

Measured 2d ago against content hash 601a20603f7e, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-05, from the pricing page.

Security

Grade A, and why

gsd:map-codebase scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

This is a copy

86% identical to gsd-map-codebase — 7 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.claude/commands/gsd/map-codebase.md · 83 lines

What it actually says

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.

<execution_context> @D:/VSC/xbrain/.claude/get-shit-done/workflows/map-codebase.md </execution_context>

Parse the first token of $ARGUMENTS:

  • If it is --fast: strip the flag, run the scan workflow (passing remaining args including optional --focus).
  • 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:

  • 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

<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>

<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>
Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2d ago First seen · 83 lines · 22 tokens per session scan A 601a20603f7e

Subscribe to this mod's changes

gsd:map-codebase is a command published in the GitHub repository mrboups/xbrain (2 stars, last pushed 21d ago), licensed MIT. It adds 22 tokens to every session and 857 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. It is 86% identical to gsd-map-codebase, differing in 7 lines, and is treated as a copy.