gsd-codebase-mapper

gsd-codebase-mapper is an agent for coding agents from Lua2147/claude-toolkit-catalog. It costs 46 tokens per session (4,385 once invoked), scanned C, original, no licence file.

A codebase analysis agent that explores a software repository and writes structured documents about its technology, architecture, quality, and concerns.

In plain words
What is it for?
Use it to map an existing repository and document its technical structure, design, quality, and potential problems.
Why use it?
It gives the rest of a planning process a documented view of an existing codebase without requiring every detail to stay in conversation context.

Agent

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 agents/lua2147/claude-toolkit-catalog/gsd-codebase-mapper
Clone the repo
git clone --depth 1 https://github.com/Lua2147/claude-toolkit-catalog

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-codebase-mapper

README.md
[![agentmods](https://agentmods.dev/badge/agents/lua2147/claude-toolkit-catalog/gsd-codebase-mapper.svg)](https://agentmods.dev/agents/lua2147/claude-toolkit-catalog/gsd-codebase-mapper)
Your own site
<a href="https://agentmods.dev/agents/lua2147/claude-toolkit-catalog/gsd-codebase-mapper"><img src="https://agentmods.dev/badge/agents/lua2147/claude-toolkit-catalog/gsd-codebase-mapper.svg" alt="Measured on agentmods" height="20"></a>
Per session 46 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 4,385 The whole file, excluding the scripts and references it only reads on demand.
Security scan C 1 finding. Scan, not verified.
Origin unknown No closer match found 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 $0.00046 $0.04385
Opus 5 $0.00023 $0.02193
Sonnet 5 $0.00009 $0.00877
Haiku 4.5 $0.00005 $0.00439

Measured 2d ago against content hash f19149cbb835, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-05, from the pricing page.

Security

Grade C, and why

gsd-codebase-mapper scanned grade C with 1 finding 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.

Reaches for credential fileshighPrivilege escalation

SSH keys, cloud credentials, git-credentials, .npmrc, /etc/shadow: reading these is how a config file becomes a credential leak.

- `.npmrc`, `.pypirc`, `.netrc` - Package manager auth tokens
agents/gsd-codebase-mapper.md · 773 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

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 · 773 lines · 46 tokens per session scan C f19149cbb835

Subscribe to this mod's changes

gsd-codebase-mapper is an agent published in the GitHub repository Lua2147/claude-toolkit-catalog (2 stars, last pushed 4mo ago), with no licence file. It adds 46 tokens to every session and 4,385 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it C with 1 finding (reaches for credential files). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.