CodeCartographer: Instructions file for Claude Code

CLAUDE.md

CodeCartographer CLAUDE.md is an instructions file for Claude Code from HuginnIndustries/CodeCartographer. It costs 2,276 tokens per session, scanned A, original, MIT.

A set of instructions for Claude Code, an AI coding assistant, when working in the CodeCartographer repository. It documents commands, supported Node.js versions, architecture, and which parts of the project matter most to users.

In plain words
What is it for?
Use it when developing or reviewing CodeCartographer, running individual tests, building the project, or testing its local extension and published package.
Why use it?
It gives the coding assistant consistent guidance about how to build, test, run, and understand the repository.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md. Also seen: mentions CLAUDE.md; mentions subagents; mentions Claude Code.

This is HuginnIndustries/CodeCartographer's own configuration. It tells Claude Code how to work on CodeCartographer itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything CodeCartographer configures →

Reuse

Borrowing it

Nothing to install: this file belongs to HuginnIndustries/CodeCartographer. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/HuginnIndustries/CodeCartographer/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/HuginnIndustries/CodeCartographer

Made for: Claude Code.

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Per session 2,276 This file is loaded in full into every session.
When invoked 2,276 The same file — it is already loaded in full.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original 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 $0.02276 $0.02276
Opus 5.5 $0.00910 $0.00910
Sonnet 5.5 $0.00455 $0.00455
Haiku 4.5 $0.00228 $0.00228

Measured 1mo ago against content hash c48346a7b7b8, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

CodeCartographer CLAUDE.md 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 1mo 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.

CLAUDE.md · 85 lines

How it starts

The opening of the file, as written. The whole thing — 85 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

Commands

npm ci                  # install (lockfile-strict)
npm run build           # tsc compile to dist/ (required before publish; CI runs this)
npm test                # node --experimental-strip-types --test tests/*.test.mjs
npm run smoke           # end-to-end MCP smoke test against the published npm package
npm run smoke:broadside # opt-in live Broad-Side run (spends real money; needs OPENROUTER_API_KEY + a target repo)

# Run a single test file:
node --experimental-strip-types --disable-warning=ExperimentalWarning --test tests/pipeline-invariants.test.mjs

# Run the Pi extension locally against the in-tree source (no rebuild needed):
pi -e /absolute/path/to/CodeCartographer/extensions/codecarto/index.ts

Node >= 20 is the floor; CI tests on Node 22 and 24. There is no linter.

Architecture

CodeCartographer is one framework shipped through three delivery surfaces that produce byte-identical phase prompts and validation behavior. The numbering below reflects code-architecture (source-of-truth-out) ordering; the user-facing recommendation ordering in README.md is different — see "Surface priority" below.

  1. .codecarto/ — the drop-in template (Markdown + YAML, no executable code). This is both the source of truth committed in this repo and the directory that gets copied into a user's target repo on codecarto-init. core/workspace.ts exposes it as packagedWorkspaceDir, resolved at runtime by walking up from core/ to find the nearest package.json.
  2. extensions/codecarto/ — Pi extension. Registers /codecarto-* slash commands, runs phases as isolated AgentSession sub-agents (auto-runner.ts), renders the live widget (agent-widget.ts), and writes the HTML dashboard (dashboard-writer.ts). The tool_call hook in index.ts blocks bash outright and confines edit/write to .codecarto/ plus the configured library path.
  3. mcp-server/ — MCP server exposing the workflow, library, and Broad-Side operations as JSON-RPC tools over stdio. Never spawns sub-agents; returns prompt text for the host to dispatch.

Read the full file on GitHub · 85 lines

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. 1mo ago Changed · +32 tokens per session c48346a7b7b8
  2. 1mo ago Changed · +120 tokens per session 6f8ab3d7ce9a
  3. 1mo ago Changed · +62 tokens per session efea913a8873
  4. 2mo ago Changed · +2 lines · +131 tokens per session 0420703f08a5
  5. 2mo ago First seen · 83 lines · 1,931 tokens per session scan A 64f920875279

Subscribe to this mod's changes

CodeCartographer CLAUDE.md is an instructions file published in the GitHub repository HuginnIndustries/CodeCartographer (7 stars, last pushed 4d ago), licensed MIT. It adds 2,276 tokens to every session, about $0.0091 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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