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CGraph: Instructions file for Claude Code

CLAUDE.md

CGraph CLAUDE.md is an instructions file for Claude Code from Nxtsoft/CGraph. It costs 2,462 tokens per session, scanned A, original, MIT.

Project instructions for CGraph, a C++20 graph-analysis engine that maps source code into connected nodes and relationships and can export those results in several formats.

In plain words
What is it for?
Use them when working on CGraph's CMake build, graph generation, validation, exports, daemon, or host-written enrichment files.
Why use it?
They explain how to build, test, run, and modify the project while keeping deterministic graph work separate from AI or model logic.

Instructions file for Claude Code

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

This is Nxtsoft/CGraph's own configuration. It tells Claude Code how to work on CGraph 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 CGraph configures →

not rated 2repo changed 3d ago A scan 2,462 tokens original MIT
View source ↗ Nxtsoft/CGraph
Reuse

Borrowing it

Nothing to install: this file belongs to Nxtsoft/CGraph. 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/Nxtsoft/CGraph/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/Nxtsoft/CGraph

Made for: Claude Code.

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Per session 2,462 This file is loaded in full into every session.
When invoked 2,462 The same file — it is already loaded in full.
Security scan A 1 finding. 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 $0.02462 $0.02462
Opus 5.5 $0.00985 $0.00985
Sonnet 5.5 $0.00492 $0.00492
Haiku 4.5 $0.00246 $0.00246

Measured 3d ago against content hash 9294d1239c36, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

CGraph CLAUDE.md scanned grade A 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 3d 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

`igraph`, `curl`, `nlohmann-json`, `utf8proc`; tree-sitter is vendored under `vendor/tree-sitter`.
CLAUDE.md · 141 lines

How it starts

The opening of the file, as written. The whole thing — 141 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.

What this is

cgraph is a native C++20/C graph-analysis engine that ports Graphify's deterministic code-graph pipeline. It produces a Graphify-compatible graph.json (node-link format) plus HTML/SVG/Obsidian/Cypher exports, and serves low-latency graph queries from a resident per-project daemon. The design split is deliberate: the native binary owns deterministic graph work, chunk planning, fragment validation, and local graph mutation. Hosts own all model/LLM logic — there are no API keys, providers, or LLM clients in the binary. Semantic enrichment enters only as host-written, validated fragment files. See docs/host-skill-contract.md.

Build, test, run

The project uses CMake presets + vcpkg. vcpkg is vendored at ./.vcpkg and the presets read $env{VCPKG_ROOT}, which is not set in the environment — you must export it:

export VCPKG_ROOT="$PWD/.vcpkg"          # required; presets fail without it
cmake --preset default                    # configure -> build/default (Ninja, Debug)
cmake --build build/default               # build all targets
ctest --preset default                    # run the smoke tests (output-on-failure)
ctest --preset default -R cgraph_detect_test   # run a single test by name (regex)

Other presets: sanitizers (ASan/UBSan, build/sanitizers) and fuzzers (libFuzzer + ASan/UBSan, build/fuzzers, requires CGRAPH_BUILD_FUZZERS=ON). System deps via vcpkg: igraph, curl, nlohmann-json, utf8proc; tree-sitter is vendored under vendor/tree-sitter.

Built binaries land in build/default/src/<target>/:

  • cgraph (cli) — one-shot: cgraph --root PATH --out cgraph-out builds the graph and writes all exports.
  • graphd (daemon) — resident per-project server; also --benchmark-query --graph PATH --query TEXT.
  • cgraph-client (client) — thin client: cgraph-client --root PATH <query|path|explain|update|status|shutdown> [JSON params].
  • cgraph-mcp (mcp) — MCP server (stdio JSON-RPC) fronting the daemon ops.

Read the full file on GitHub · 141 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. 3d ago Changed · +5 tokens per session 9294d1239c36
  2. 19d ago Changed · +60 tokens per session 002f9a7fcac9
  3. 1mo ago Changed · +4 lines · +146 tokens per session 13aa21d3b57e
  4. 1mo ago Changed · +1 lines · +34 tokens per session 18a79ea7c69f
  5. 1mo ago First seen · 136 lines · 2,217 tokens per session scan A 06f4e16cee46

Subscribe to this mod's changes

CGraph CLAUDE.md is an instructions file published in the GitHub repository Nxtsoft/CGraph (2 stars, last pushed today), licensed MIT. It adds 2,462 tokens to every session, about $0.0098 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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