ck:gkg

A code-analysis system that maps definitions and references across a Git repository. It supports Ruby, Java, Kotlin, Python, TypeScript, and JavaScript projects.

In plain words
What is it for?
Use it for go-to-definition, finding all symbol usages, checking refactoring impact, understanding project structure, and creating architecture diagrams.
Why use it?
It helps answer where a function or class is defined, where it is used, and what might be affected by a change. This makes unfamiliar codebases and refactoring easier to inspect.

Skill for Claude CodeCodex

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 skills/manhvann/codexkit/gkg
Any agent
npx skills add manhvann/codexkit --skill gkg
Clone the repo
git clone --depth 1 https://github.com/manhvann/codexkit

Made for: Claude Code, Codex.

Per session 44 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 623 The whole file, excluding the scripts and references it only reads on demand.
Security scan C 2 findings. Scan, not verified.
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 $0.00044 $0.00623
Opus 5 $0.00022 $0.00311
Sonnet 5 $0.00009 $0.00125
Haiku 4.5 $0.00004 $0.00062

Measured 2d ago against content hash be272e2c9d70, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade C, and why

ck:gkg scanned grade C with 2 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.

Downloads and executes remote codehighSupply chain

curl | sh runs whatever the server returns today, which is not necessarily what it returned when this was reviewed.

curl -fsSL https://gitlab.com/gitlab-org/rust/knowledge-graph/-/raw/main/install.sh | bash

Makes network callslowCapability

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

curl -fsSL https://gitlab.com/gitlab-org/rust/knowledge-graph/-/raw/main/install.sh | bash
.agents/skills/gkg/SKILL.md · 92 lines

How it starts

The opening of the file, as written. The whole thing — 92 lines — stays where its author put it; the contents beside it link to each section on GitHub.

GitLab Knowledge Graph (GKG)

Semantic code analysis engine using AST parsing and KuzuDB graph database. Enables IDE-like code navigation for AI assistants.

Status: Public beta | Requires: Git repository | Storage: ~/.gkg/

When to Use

  • Find all usages of a function/class across codebase
  • Go-to-definition for symbols
  • Impact analysis before refactoring
  • Generate architecture diagrams
  • RAG-enhanced code understanding

Use repomix instead for: quick context dumps, any-language support, remote repos, token counting.

Quick Start

# Check installation
gkg --version

# Index current repo
gkg index

# Start server (for API/MCP)
gkg server start

# Stop before re-indexing
gkg server stop

Installation

# macOS/Linux
curl -fsSL https://gitlab.com/gitlab-org/rust/knowledge-graph/-/raw/main/install.sh | bash

# Windows (PowerShell)
irm https://gitlab.com/gitlab-org/rust/knowledge-graph/-/raw/main/install.ps1 | iex

Core Workflows

Index and Query

gkg index /path/to/project --stats
gkg server start
# Query via HTTP API at http://localhost:27495

Find Symbol Usages

  1. Index project: gkg index
  2. Start server: gkg server start
  3. Use MCP tool get_references or HTTP API /api/graph/search

Impact Analysis

  1. Index affected repos
  2. Query get_references for changed symbols
  3. Review all call sites before refactoring

Language Support

Language Cross-file Refs
Ruby ✅ Full
Java ✅ Full
Kotlin ✅ Full
Python 🚧 In progress
TypeScript 🚧 In progress
JavaScript 🚧 In progress

References

Key Constraints

Read the full file on GitHub · 92 lines

Files

What ships with it

4 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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 · 92 lines · 44 tokens per session scan C be272e2c9d70

Subscribe to this mod's changes

ck:gkg is a skill published in the GitHub repository manhvann/codexkit (88 stars, last pushed 4d ago), licensed MIT. It adds 44 tokens to every session and 623 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it C with 2 findings (downloads and executes remote code, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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