<div align="center">

# CodeGraph

Already installed? Run `codegraph upgrade`

Follow [@getcodegraph](https://x.com/getcodegraph) on X for updates.

### Supercharge Claude Code, Cursor, Codex, OpenCode, Hermes Agent, Gemini, Antigravity, Kiro, and GitHub Copilot with Semantic Code Intelligence

**The fastest complete code graph · surgical context · built for how agents actually work · 100% local**

<picture>
  <source media="(prefers-color-scheme: dark)" srcset="https://raw.githubusercontent.com/colbymchenry/codegraph/main/assets/rust-logo-dark.svg?v=1">
  <img src="https://raw.githubusercontent.com/colbymchenry/codegraph/main/assets/rust-logo.svg?v=1" height="30" alt="Rust" align="center">
</picture>&nbsp; **Kernel powered by Rust**

### [Documentation & Website →](https://colbymchenry.github.io/codegraph/)

[![npm version](https://img.shields.io/npm/v/@colbymchenry/codegraph.svg)](https://www.npmjs.com/package/@colbymchenry/codegraph)
[![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)
[![Self-contained](https://img.shields.io/badge/Node.js-bundled%20%C2%B7%20none%20required-brightgreen.svg)](https://nodejs.org/)
[![npm provenance](https://img.shields.io/badge/npm-provenance-brightgreen.svg)](#verified-releases)
[![Attested builds](https://img.shields.io/badge/releases-signed%20%26%20attested-brightgreen.svg)](#verified-releases)

[![Windows](https://img.shields.io/badge/Windows-supported-blue.svg)](#supported-platforms)
[![macOS](https://img.shields.io/badge/macOS-supported-blue.svg)](#supported-platforms)
[![Linux](https://img.shields.io/badge/Linux-supported-blue.svg)](#supported-platforms)

[![Claude Code](https://img.shields.io/badge/Claude_Code-supported-blueviolet.svg)](#supported-agents)
[![Cursor](https://img.shields.io/badge/Cursor-supported-blueviolet.svg)](#supported-agents)
[![Codex](https://img.shields.io/badge/Codex-supported-blueviolet.svg)](#supported-agents)
[![opencode](https://img.shields.io/badge/opencode-supported-blueviolet.svg)](#supported-agents)
[![Hermes Agent](https://img.shields.io/badge/Hermes_Agent-supported-blueviolet.svg)](#supported-agents)
[![Gemini](https://img.shields.io/badge/Gemini-supported-blueviolet.svg)](#supported-agents)
[![Antigravity](https://img.shields.io/badge/Antigravity-supported-blueviolet.svg)](#supported-agents)
[![Kiro](https://img.shields.io/badge/Kiro-supported-blueviolet.svg)](#supported-agents)
[![GitHub Copilot](https://img.shields.io/badge/GitHub_Copilot-supported-blueviolet.svg)](#supported-agents)

<br>

**The CodeGraph platform is coming** — for every PR, know exactly what to test, what could break, which flows are affected, and whether business logic is compromised.

<a href="https://getcodegraph.com"><img alt="Join the waitlist for early beta access" src="https://raw.githubusercontent.com/colbymchenry/codegraph/main/assets/waitlist.svg?v=2" height="52"></a>

<sub>Get <b>early beta access</b> to the hosted product · <a href="https://getcodegraph.com">getcodegraph.com</a></sub>

</div>

## Contents

- [Get Started](#get-started)
- [Language Support](#language-support)
- [Why CodeGraph?](#why-codegraph)
- [Key Features](#key-features)
- [Framework-aware Routes](#framework-aware-routes)
- [Mixed iOS / React Native / Expo bridging](#mixed-ios--react-native--expo-bridging)
- [Quick Start](#quick-start)
- [How It Works](#how-it-works)
- [CLI Reference](#cli-reference)
- [MCP Tools](#mcp-tools)
- [Library Usage](#library-usage)
- [Configuration](#configuration)
- [Telemetry](#telemetry)
- [Verified releases](#verified-releases)
- [Supported Platforms](#supported-platforms)
- [Supported Agents](#supported-agents)
- [Supported Languages](#supported-languages)
- [Measured cross-file coverage](#measured-cross-file-coverage)
- [Troubleshooting](#troubleshooting)
- [License](#license)

## Get Started

### 1. Install the CLI

**No Node.js required** — one command grabs the right build for your OS:

```bash
# macOS / Linux
curl -fsSL https://raw.githubusercontent.com/colbymchenry/codegraph/main/install.sh | sh

# Windows (PowerShell)
irm https://raw.githubusercontent.com/colbymchenry/codegraph/main/install.ps1 | iex
```

<details>
<summary><b>Already have Node? Use npm instead (works on any version)</b></summary>

```bash
npm i -g @colbymchenry/codegraph
```

<sub>CodeGraph bundles its own runtime — nothing to compile, no native build, works the same everywhere. The installer puts `codegraph` on your PATH but **doesn't change your current shell** — open a new terminal before the next step so the command resolves.</sub>

<sub>**Upgrade any time** with `codegraph upgrade` — it detects how you installed (bundle, npm, or npx) and updates in place. Add `--check` to see if an update is available, or `codegraph upgrade <version>` to pin one.</sub>

</details>

### 2. Wire up your agent(s)

In a **new terminal**, run the installer to connect CodeGraph to the agents you use:

```bash
codegraph install
```

<sub>Detects and auto-configures Claude Code, Cursor, Codex CLI, opencode, Hermes Agent, Gemini CLI, Antigravity IDE, Kiro, and GitHub Copilot (VS Code, Copilot CLI, JetBrains IDEs) — wiring the CodeGraph MCP server into each. **This is the step that connects CodeGraph to your agent;** installing the CLI in step 1 does not do it on its own. It only wires up your agent — it does **not** index any code; building each project's graph is the separate `codegraph init` in step 3. (Shortcut: `npx @colbymchenry/codegraph` downloads and runs this in one go.)</sub>

### 3. Initialize each project

```bash
cd your-project
codegraph init
```

<sub>`codegraph init` creates the local `.codegraph/` directory and builds the full graph in the same step — one command, done.</sub>

<div align="center">

![1_C_VYnhpys0UHrOuOgpgoyw](https://github.com/user-attachments/assets/f168182f-4d9a-44e0-94d7-08d018cc8a3a)

</div>

### 4. No more syncing!

Auto-sync is enabled by default. CodeGraph watches the project and updates the graph on every file change — while your agent edits code, or you add, modify, or delete files. **The index is never stale, and there is nothing to re-run.**

### Uninstall

Changed your mind? One command removes CodeGraph from every agent it configured **and** the CLI itself — every install it finds (standalone bundle, npm global package, launcher link), shown to you before anything is deleted:

```bash
codegraph uninstall
```

Pass `--keep-cli` to remove only the agent configurations and keep the CLI installed.

<sub>Reverses the installer — strips CodeGraph's MCP server config, instructions, and permissions from each configured agent. Your project indexes (`.codegraph/`) are left untouched; remove those per-project with `codegraph uninit`. Use `--target` to remove from specific agents, or `--yes` to run non-interactively.</sub>

---

## Language Support

Every language below gets the same treatment — full structural extraction and cross-file resolution into one graph, no per-language setup:

<p align="center">
  <img src="https://raw.githubusercontent.com/colbymchenry/codegraph/main/assets/languages/typescript.svg?v=1" width="104" height="104" alt="TypeScript" />
  <img src="https://raw.githubusercontent.com/colbymchenry/codegraph/main/assets/languages/javascript.svg?v=1" width="104" height="104" alt="JavaScript" />
  <img src="https://raw.githubusercontent.com/colbymchenry/codegraph/main/assets/languages/arkts.svg?v=1" width="104" height="104" alt="ArkTS" />
  <img src="https://raw.githubusercontent.com/colbymchenry/codegraph/main/assets/languages/python.svg?v=1" width="104" height="104" alt="Python" />
  <img src="https://raw.githubusercontent.com/colbymchenry/codegraph/main/assets/languages/go.svg?v=1" width="104" height="104" alt="Go" />
  <img src="https://raw.githubusercontent.com/colbymchenry/codegraph/main/assets/languages/rust.svg?v=1" width="104" height="104" alt="Rust" />
  <img src="https://raw.githubusercontent.com/colbymchenry/codegraph/main/assets/languages/java.svg?v=1" width="104" height="104" alt="Java" />
  <img src="https://raw.githubusercontent.com/colbymchenry/codegraph/main/assets/languages/csharp.svg?v=1" width="104" height="104" alt="C#" />
  <img src="https://raw.githubusercontent.com/colbymchenry/codegraph/main/assets/languages/php.svg?v=1" width="104" height="104" alt="PHP" />
  <img src="https://raw.githubusercontent.com/colbymchenry/codegraph/main/assets/languages/ruby.svg?v=1" width="104" height="104" alt="Ruby" />
  <img src="https://raw.githubusercontent.com/colbymchenry/codegraph/main/assets/languages/c.svg?v=1" width="104" height="104" alt="C" />
  <img src="https://raw.githubusercontent.com/colbymchenry/codegraph/main/assets/languages/cpp.svg?v=1" width="104" height="104" alt="C++" />
  <img src="https://raw.githubusercontent.com/colbymchenry/codegraph/main/assets/languages/objective-c.svg?v=1" width="104" height="104" alt="Objective-C" />
  <img src="https://raw.githubusercontent.com/colbymchenry/codegraph/main/assets/languages/metal.svg?v=1" width="104" height="104" alt="Metal" />
  <img src="https://raw.githubusercontent.com/colbymchenry/codegraph/main/assets/languages/cuda.svg?v=1" width="104" height="104" alt="CUDA" />
  <img src="https://raw.githubusercontent.com/colbymchenry/codegraph/main/assets/languages/swift.svg?v=1" width="104" height="104" alt="Swift" />
  <img src="https://raw.githubusercontent.com/colbymchenry/codegraph/main/assets/languages/kotlin.svg?v=1" width="104" height="104" alt="Kotlin" />
  <img src="https://raw.githubusercontent.com/colbymchenry/codegraph/main/assets/languages/scala.svg?v=1" width="104" height="104" alt="Scala" />
  <img src="https://raw.githubusercontent.com/colbymchenry/codegraph/main/assets/languages/dart.svg?v=1" width="104" height="104" alt="Dart" />
  <img src="https://raw.githubusercontent.com/colbymchenry/codegraph/main/assets/languages/svelte.svg?v=1" width="104" height="104" alt="Svelte" />
  <img src="https://raw.githubusercontent.com/colbymchenry/codegraph/main/assets/languages/vue.svg?v=1" width="104" height="104" alt="Vue" />
  <img src="https://raw.githubusercontent.com/colbymchenry/codegraph/main/assets/languages/astro.svg?v=1" width="104" height="104" alt="Astro" />
  <img src="https://raw.githubusercontent.com/colbymchenry/codegraph/main/assets/languages/liquid.svg?v=1" width="104" height="104" alt="Liquid" />
  <img src="https://raw.githubusercontent.com/colbymchenry/codegraph/main/assets/languages/delphi.svg?v=1" width="104" height="104" alt="Pascal / Delphi" />
  <img src="https://raw.githubusercontent.com/colbymchenry/codegraph/main/assets/languages/lua.svg?v=1" width="104" height="104" alt="Lua" />
  <img src="https://raw.githubusercontent.com/colbymchenry/codegraph/main/assets/languages/r.svg?v=1" width="104" height="104" alt="R" />
  <img src="https://raw.githubusercontent.com/colbymchenry/codegraph/main/assets/languages/luau.svg?v=1" width="104" height="104" alt="Luau" />
  <img src="https://raw.githubusercontent.com/colbymchenry/codegraph/main/assets/languages/cfml.svg?v=1" width="104" height="104" alt="CFML" />
  <img src="https://raw.githubusercontent.com/colbymchenry/codegraph/main/assets/languages/cobol.svg?v=1" width="104" height="104" alt="COBOL" />
  <img src="https://raw.githubusercontent.com/colbymchenry/codegraph/main/assets/languages/vbnet.svg?v=1" width="104" height="104" alt="Visual Basic .NET" />
  <img src="https://raw.githubusercontent.com/colbymchenry/codegraph/main/assets/languages/erlang.svg?v=1" width="104" height="104" alt="Erlang" />
  <img src="https://raw.githubusercontent.com/colbymchenry/codegraph/main/assets/languages/solidity.svg?v=1" width="104" height="104" alt="Solidity" />
  <img src="https://raw.githubusercontent.com/colbymchenry/codegraph/main/assets/languages/terraform.svg?v=1" width="104" height="104" alt="Terraform / OpenTofu" />
  <img src="https://raw.githubusercontent.com/colbymchenry/codegraph/main/assets/languages/nix.svg?v=1" width="104" height="104" alt="Nix" />
</p>

<sub>Per-language details — extensions, frameworks, and what exactly gets extracted — in [Supported Languages](#supported-languages).</sub>

---

## Why CodeGraph?

When an AI agent needs to understand code — to answer a question or make a change — it discovers structure the slow way: grep, glob, and Read, one file at a time, rebuilding call paths and dependencies by hand. That's a pile of tool calls and round-trips before it even starts the real work.

**CodeGraph hands the agent the exact code it needs in one call.** It's a pre-built knowledge graph of every symbol, call edge, and dependency in your codebase — so instead of crawling files, the agent asks one question and gets back the relevant source, the call paths between those symbols (including dynamic-dispatch hops grep can't follow), and the blast radius of a change. **Surgical context, not a file-by-file search** — which means fewer tool calls and faster answers on every codebase, large or small.

<img width="1536" height="1024" alt="token-cost-savings-scale" src="https://github.com/user-attachments/assets/eb74a11a-a3ab-4b01-80a6-19f78352ae8e" />

> **A note on cost:** CodeGraph's win on *every* codebase is precision — the agent stops crawling files and answers from the graph. On current models that precision is also a large direct saving: the 2026-08 re-measurement, on a harness that blocks the CLI in both arms, put it at **44% lower cost and 62% fewer tokens on average** across the seven benchmark repos, because a strong model *without* the graph burns its budget re-deriving structure. Cost tracks how much *discovery* a question demands more than raw repo size: 57–78% on questions the file-reading agent needed 28–43 tool calls to answer, near-even where it got there in 7.

> **A note on context:** the numbers above measure *throughput* — tokens processed, tools called, dollars spent to reach one answer. They don't measure what is still sitting in your context window afterward, and on that axis CodeGraph costs **more**, not less. Across the same seven repos in multi-turn sessions, CodeGraph's responses leave about **80% more retrieval context resident** at the end of a session than a file-reading agent's do — on VS Code, 67k tokens against 18k. The mechanism is the same one that makes it fast: CodeGraph returns one dense, verbatim payload that answers the question and then stays in the window, where a grep-and-read agent churns through many small results that get evicted. Fewer tokens *processed* and a larger persistent *footprint* are both real at once. If you run long sessions in a small window, budget for it. Measured per-repo: [`docs/benchmarks/residual-context-occupancy.md`](docs/benchmarks/residual-context-occupancy.md).

### Benchmark Results

Tested across **7 real-world open-source codebases** spanning 7 languages, comparing an agent (Claude Code, headless) answering one architecture question **with** and **without** CodeGraph, at the **median of 4 runs per arm**. _Re-measured 2026-08-05 on **Claude Opus 4.8** against the current build, on a harness that blocks the `codegraph` CLI in **both** arms — contamination row: 0 of 28 without-arm runs._

> **The universal win — every repo, every size: 88% fewer tool calls · 53% faster · 62% fewer tokens · 44% cheaper · file reads cut to zero on all seven repos.**

With the index available, the agent answers from one to four `codegraph_explore` calls and stops. Without it, the agent burns its budget on discovery — up to **43 tool calls and 19 file reads** re-deriving what the graph already knew. Every repo was faster with CodeGraph in this measurement — by 35% on the narrowest question, by 3.6× on the widest.

| Codebase | Language | Tool calls | Time | File reads | Tokens | Cost |
|----------|----------|------------|------|------------|--------|------|
| **VS Code** | TypeScript · ~11k files | **2 vs 28** | **2.2× faster** (58s vs 2m 10s) | **0** vs 12 | 77% fewer | 71% cheaper |
| **Excalidraw** | TypeScript · ~640 | **2 vs 43** | **3.6× faster** (45s vs 2m 42s) | **0** vs 18 | 84% fewer | 78% cheaper |
| **Django** | Python · ~3k | 3 vs 14 | 35% faster (54s vs 1m 23s) | **0** vs 8.5 | 41% fewer | 13% cheaper¹ |
| **Tokio** | Rust · ~790 | 3 vs 29 | **2.6× faster** (1m 3s vs 2m 43s) | **0** vs 19 | 65% fewer | 64% cheaper |
| **OkHttp** | Java · ~645 | 1 vs 6 | 43% faster (33s vs 58s) | **0** vs 2 | 54% fewer | 21% cheaper |
| **Gin** | Go · ~110 | 1 vs 7 | 39% faster (28s vs 46s) | **0** vs 4 | 52% fewer | ~even¹ |
| **Alamofire** | Swift · ~110 | 4 vs 33 | **2.6× faster** (54s vs 2m 22s) | **0** vs 16.5 | 59% fewer | 57% cheaper |

<sub>¹ Cost tracks how much *discovery* the question demanded, which is why it varies far more than the other columns: 57–78% on repos where the file-reading arm needed 28–43 tool calls, but only 13% on Django and even on Gin, where it got there in 14 and 7. The with-arm still answered in 3 and 1 calls with zero file reads. **File reads** = median files opened — the surgical-context win in one column: the agent never reads a file on any of the seven repos when CodeGraph is present.</sub>

<details>
<summary><strong>Per-repo breakdown — WITH vs WITHOUT (median of 4)</strong></summary>

| Codebase | Metric | WITH cg | WITHOUT cg |
|---|---|---|---|
| **VS Code** | Time / Tools / Tokens / Cost | 58s / 2 / 155k / $0.53 | 2m 10s / 28 / 670k / $1.80 |
| **Excalidraw** | Time / Tools / Tokens / Cost | 45s / 2 / 156k / $0.54 | 2m 42s / 43 / 991k / $2.43 |
| **Django** | Time / Tools / Tokens / Cost | 54s / 3 / 183k / $0.55 | 1m 23s / 14 / 309k / $0.63 |
| **Tokio** | Time / Tools / Tokens / Cost | 1m 3s / 3 / 201k / $0.66 | 2m 43s / 29 / 573k / $1.83 |
| **OkHttp** | Time / Tools / Tokens / Cost | 33s / 1 / 107k / $0.39 | 58s / 6 / 230k / $0.50 |
| **Gin** | Time / Tools / Tokens / Cost | 28s / 1 / 87k / $0.31 | 46s / 7 / 180k / $0.31 |
| **Alamofire** | Time / Tools / Tokens / Cost | 54s / 4 / 209k / $0.54 | 2m 22s / 33 / 505k / $1.27 |

</details>

<details>
<summary><strong>Full benchmark details</strong></summary>

**Methodology.** Each arm is `claude -p` (Claude Opus 4.8, `claude-opus-4-8`) run headlessly against the repo with `--strict-mcp-config`: **WITH** = CodeGraph's MCP server enabled, **WITHOUT** = an empty MCP config. Built-in Read/Grep/Bash stay available to both. Same question per repo, **4 runs per arm, median reported**. Cost = the run's `total_cost_usd`; Tokens = total tokens processed, summed per assistant turn (input incl. cache reads + cache creation + output); Time = wall-clock; Tool calls = every tool invocation, including those inside any sub-agents the model spawns. Repos cloned at `--depth 1` and indexed by the same CodeGraph build that served them. Re-measured 2026-08-05 on the current build.

**The `codegraph` CLI is blocked in both arms.** A sanitized `PATH` plus a `PreToolUse` hook denies any Bash invocation of the CLI, in the WITHOUT arm as well as the WITH arm. This matters: without that block the control arm is not a control. On an unblocked harness we measured the WITHOUT agent finding the CLI on `PATH` and reaching CodeGraph through Bash in **26 of 28 runs** — which distorts the comparison in both directions, since a CLI call is not counted as a tool call and its output still enters the window. Earlier published figures were produced without this block. In the run reported above, all 28 WITHOUT runs attempted the CLI and **all 28 were blocked — 0 contaminated**.

**Queries:**
| Codebase | Query |
|----------|-------|
| VS Code | "How does the extension host communicate with the main process?" |
| Excalidraw | "How does Excalidraw render and update canvas elements?" |
| Django | "How does Django's ORM build and execute a query from a QuerySet?" |
| Tokio | "How does tokio schedule and run async tasks on its runtime?" |
| OkHttp | "How does OkHttp process a request through its interceptor chain?" |
| Gin | "How does gin route requests through its middleware chain?" |
| Alamofire | "How does Alamofire build, send, and validate a request?" |

**Why CodeGraph wins:** with the index available, the agent answers directly — usually one `codegraph_explore` returns the relevant source — and stops, with zero file reads on every benchmark repo. Without it, the agent spends most of its budget on discovery (find/ls/grep) before reading the right code. CodeGraph only helps when queried *directly*, so its instructions steer agents to answer directly rather than delegate exploration to file-reading sub-agents — otherwise a sub-agent reads files regardless and CodeGraph becomes overhead.

</details>

---

## Built for speed — the Rust kernel

CodeGraph's parsing engine is a **native Rust kernel**: 20 languages — TypeScript, JavaScript, Java, Python, Go, C, C++, Rust, C#, Ruby, PHP, Swift, Kotlin, Scala, Dart, R, Lua, Luau (Metal and CUDA ride the C++ path) — parse in compiled code with one boundary crossing per file. Every language shipped only after its graphs proved **byte-for-byte identical** to the reference engine on real repositories, from small libraries up to the Linux kernel; platforms without a prebuilt binary and files with syntax errors fall back per-file automatically, same graph either way.

**And it scales itself to the machine it's on.** Worker pools, parallel resolution, and analysis caches are sized from what the system actually has — real core counts (container/cgroup-aware, so a VPS that grants 2 cores gets sized for 2, not the host's 64), honestly-measured available RAM on macOS and Linux, and the measured cost of *your* project's resolution work:

- **On a workstation:** the full parallel pipeline — native parse workers, a multi-worker resolver pool that engages the moment it pays for itself, memory-gated analysis caches. The Swift compiler repository (27k files of Swift and C++) fresh-indexes in about 100 seconds; a one-file edit re-syncs in ~4.
- **On a 2-core / 6GB VPS:** the same graph, from a pipeline tuned to *finish* — the Linux kernel (70k files, 2M symbols, 6.4M relationships) indexes to completion in under 12 minutes where RAM-first designs run out of memory before reaching 1%.
- **Every day after day one:** saving a file updates the graph in well under a second — the watcher fires 300ms after a lone save and syncs exactly what changed (~0.3s of work on a 4,400-file project, ~0.4s on the 27,000-file Swift compiler repo), never re-scanning the tree. Measured against the fastest competing indexer's re-index-on-change: 2–7× faster on medium and larger repos across a 31-repo, 30-language benchmark — and the gap widens with repo size, because their cost grows with the repository and ours grows with the change.

---

## Key Features

| | |
|---|---|
| **Native Rust Kernel** | Parsing and extraction run in a compiled Rust engine for 20 languages — with graphs verified byte-for-byte identical to the reference engine, and automatic per-file fallback so nothing ever breaks |
| **Adapts to Your Machine** | Sizes its worker pools and caches from what the system actually has — real core counts (container-aware), honest available RAM, measured per-project cost. A workstation gets the full parallel pipeline; a 2-core VPS gets one tuned to finish reliably |
| **Surgical Context** | One tool call returns entry points, related symbols, and code snippets — no slow file-by-file exploration |
| **Full-Text Search** | Find code by name instantly across your entire codebase, powered by FTS5 |
| **Impact Analysis** | Trace callers, callees, and the full impact radius of any symbol before making changes |
| **Always Fresh** | File watcher uses native OS events (FSEvents/inotify/ReadDirectoryChangesW) with debounced auto-sync — the graph stays current as you code, zero config |
| **20+ Languages** | TypeScript, JavaScript, ArkTS, Python, Go, Rust, Java, C#, VB.NET, PHP, Ruby, C, C++, CUDA, Objective-C, Metal, Swift, Kotlin, Scala, Dart, Lua, Luau, R, Nix, Erlang, CFML, COBOL, Solidity, Terraform/OpenTofu, Svelte, Vue, Astro, Liquid, Pascal/Delphi |
| **Framework-aware Routes** | Recognizes web-framework routing files and links URL patterns to their handlers across 17 frameworks |
| **Mixed iOS / React Native / Expo** | Closes cross-language flows that static parsing misses: Swift ↔ ObjC bridging, React Native legacy bridge + TurboModules + Fabric view components, native → JS event emitters, Expo Modules |
| **100% Local** | No data leaves your machine. No API keys. No external services. SQLite database only |

<details>
<summary><strong>How auto-syncing works — and why you don't need to run <code>codegraph sync</code> manually</strong></summary>

When your agent (Claude Code, Cursor, Codex, opencode) launches `codegraph serve --mcp`, three layers keep the index in step with your code — and make sure the agent never gets a silent wrong answer in the brief window between an edit and the next sync:

1. **File watcher with debounced auto-sync.** A native FSEvents / inotify / ReadDirectoryChangesW watcher captures every source-file create / modify / delete and triggers a re-index after a debounce window (default `2000ms`, tunable via `CODEGRAPH_WATCH_DEBOUNCE_MS`, clamped to `[100ms, 60s]`). Bursts of edits collapse into a single sync.

2. **Per-file staleness banner.** During the brief debounce window, MCP tool responses that would reference a still-pending file prepend a `⚠️` banner naming it and telling the agent to `Read` it directly. Pending files NOT referenced by the response surface as a small footer instead. Either way, the agent gets an explicit signal — validated with Claude Code, where the agent literally says "Reading the file directly for the live content" before opening it.

3. **Connect-time catch-up.** When the MCP server (re)connects, codegraph runs a fast `(size, mtime)` + content-hash reconciliation against the working tree before answering the first query — so edits made while no MCP server was running (a `git pull` from the terminal, edits from another editor, a previous agent session that exited) get absorbed on the next session's first tool call.

```
agent writes src/Widget.ts
  → watcher fires (<100ms)
  → debounce (default 2s)
  → sync; Widget.ts is in the index
  → next agent query sees it
```

**Verify any time** with `codegraph status` (CLI). If anything is pending, you'll see a `### Pending sync:` section naming the files and their edit age.

The handful of cases where manual `codegraph sync` makes sense: the watcher is disabled (sandboxed environments, or `CODEGRAPH_NO_DAEMON=1`), or you're scripting against the index outside an agent session and want a pre-flight sync at the start of your script.

→ Full deep-dive in [Guides → Indexing a Project](https://colbymchenry.github.io/codegraph/guides/indexing/#stay-fresh-automatically).

</details>

---

## Framework-aware Routes

CodeGraph detects web-framework routing files and emits `route` nodes linked by `references` edges to their handler classes or functions. Querying callers of a view/controller now surfaces the URL pattern that binds it.

| Framework | Shapes recognized |
|---|---|
| **Django** | `path()`, `re_path()`, `url()`, `include()` in `urls.py` (CBV `.as_view()`, dotted paths) |
| **Flask** | `@app.route('/path', methods=[...])`, blueprint routes |
| **FastAPI** | `@app.get(...)`, `@router.post(...)`, all standard methods |
| **Express** | `app.get(...)`, `router.post(...)` with middleware chains |
| **NestJS** | `@Controller` + `@Get/@Post/...`, GraphQL `@Resolver` + `@Query/@Mutation`, `@MessagePattern`/`@EventPattern`, `@SubscribeMessage` |
| **Laravel** | `Route::get()`, `Route::resource()`, `Controller@action`, tuple syntax |
| **Drupal** | `*.routing.yml` routes (`_controller`, `_form`, entity handlers); `hook_*` implementations in `.module`/`.theme`/`.install`/`.inc` |
| **Rails** | `get '/x', to: 'users#index'`, hash-rocket `=>` syntax |
| **Spring** | `@GetMapping`, `@PostMapping`, `@RequestMapping` on methods |
| **Play** | `GET`/`POST`/… verb routes in `conf/routes` → `Controller.method` actions (Scala + Java) |
| **Gin / chi / gorilla / mux** | `r.GET(...)`, `router.HandleFunc(...)` |
| **Axum / actix / Rocket** | `.route("/x", get(handler))` |
| **ASP.NET** | `[HttpGet("/x")]` attributes on action methods |
| **Vapor** | `app.get("x", use: handler)` |
| **React Router** / **SvelteKit** | Route component nodes |
| **Vue Router** / **Nuxt** | `pages/` file-based routes, `server/api/` endpoints, route middleware |
| **Astro** | `src/pages/` file-based routes (`.astro` pages + `.ts` endpoints, `[param]`/`[...rest]` syntax) |

---

## Mixed iOS / React Native / Expo bridging

Real iOS and React Native codebases live across multiple languages — a Swift caller invokes an Objective-C selector that's been auto-bridged, a JS file calls into a native module via the React Native bridge, a JSX component delegates to a native view manager. Static tree-sitter extraction stops at each language boundary. CodeGraph bridges them so `codegraph_explore` connects the flow end-to-end across the gap — call paths and blast radius cross the boundary instead of stopping at it.

| Boundary | JS / Swift side | Native side | How |
|---|---|---|---|
| **Swift → ObjC** | Swift `obj.foo(bar:)` | ObjC selector `-fooWithBar:` | `@objc` auto-bridging rules (including init/property/protocol forms) + Cocoa preposition prefixes (`With`/`For`/`By`/`In`/`On`/`At`/…) |
| **ObjC → Swift** | ObjC `[obj fooWithBar:]` | Swift `@objc func foo(bar:)` | Reverse-bridge name candidates; verifies `@objc` exposure from source |
| **React Native legacy bridge** | JS `NativeModules.X.fn(...)` | ObjC `RCT_EXPORT_METHOD` / `RCT_REMAP_METHOD` · Java/Kotlin `@ReactMethod` | Parses macro/annotation declarations to build a JS-name → native-method map |
| **React Native TurboModules** | JS `import M from './NativeM'; M.fn(...)` | Native impl matching the Codegen spec | Treats the `Native<X>.ts` spec interface as ground truth |
| **RN native → JS events** | JS `new NativeEventEmitter(...).addListener('e', cb)` | ObjC `[self sendEventWithName:@"e" body:...]` · Swift `sendEvent(withName: "e", ...)` · Java/Kotlin `.emit("e", ...)` | Synthesized cross-language event channel keyed by literal event name |
| **Expo Modules** | JS `requireNativeModule('X').fn(...)` | Swift / Kotlin `Module { Name("X"); AsyncFunction("fn") { ... } }` | Parses the Expo DSL literals; synthetic method nodes resolve via existing name-match |
| **Fabric view components** | JSX `<MyView prop={v}/>` | TS Codegen spec + native impl class | Spec → `component` node; convention-based name+suffix lookup (`View`/`ComponentView`/`Manager`/`ViewManager`) bridges to native |
| **Legacy Paper view managers** | JSX `<MyView prop={v}/>` | ObjC `RCT_EXPORT_VIEW_PROPERTY` · Java/Kotlin `@ReactProp` | Same as Fabric — Paper-era declarations also produce `component` + `property` nodes |

**Validated on real codebases** (small + medium + large for each bridge):

| Bridge | Small | Medium | Large |
|---|---|---|---|
| Swift ↔ ObjC | [Charts](https://github.com/danielgindi/Charts) | [realm-swift](https://github.com/realm/realm-swift) | [Wikipedia-iOS](https://github.com/wikimedia/wikipedia-ios) |
| RN legacy bridge | [AsyncStorage](https://github.com/react-native-async-storage/async-storage) | [react-native-svg](https://github.com/software-mansion/react-native-svg) | [react-native-firebase](https://github.com/invertase/react-native-firebase) |
| RN native → JS events | [RNGeolocation](https://github.com/Agontuk/react-native-geolocation-service) | — | react-native-firebase |
| Expo Modules | expo-haptics | expo-camera | expo SDK sweep (7 packages) |
| Fabric / Paper views | [react-native-segmented-control](https://github.com/react-native-segmented-control/segmented-control) | [react-native-screens](https://github.com/software-mansion/react-native-screens) | [react-native-skia](https://github.com/Shopify/react-native-skia) |

Each bridge emits edges tagged `provenance:'heuristic'` with `metadata.synthesizedBy:` set to a stable channel name (e.g. `swift-objc-bridge`, `rn-event-channel`, `fabric-native-impl`, `expo-module-extract`), so the agent can tell at a glance how a hop got into the graph.

---

## Quick Start

### 1. Run the Installer

```bash
npx @colbymchenry/codegraph
```

The installer will:
- Ask which agent(s) to configure — auto-detects installed ones from: **Claude Code**, **Cursor**, **Codex CLI**, **opencode**, **Hermes Agent**, **Gemini CLI**, **Antigravity IDE**, **Kiro**, **GitHub Copilot** (VS Code, Copilot CLI, JetBrains IDEs)
- Prompt to install `codegraph` on your PATH (so agents can launch the MCP server)
- Ask whether configs apply to all your projects or just this one
- Write each chosen agent's MCP server config, plus a small marker-fenced CodeGraph section in the agent's instructions file (`CLAUDE.md` / `AGENTS.md` / `GEMINI.md`) — that's how subagents and non-MCP agents learn the `codegraph explore` command, since the MCP server's own guidance only reaches the main agent. Removed cleanly by `codegraph uninstall`.
- Set up auto-allow permissions when Claude Code is one of the targets

The installer **wires up your agents only — it does not index your code.** After it finishes, build each project's graph yourself with `codegraph init` (step 3). One global `codegraph install` covers every project; you run `codegraph init` once per project.

**Non-interactive (scripting / CI):**

```bash
codegraph install --yes                              # auto-detect agents, install global
codegraph install --target=cursor,claude --yes       # explicit target list
codegraph install --target=auto --location=local     # detected agents, project-local
codegraph install --target=copilot-vscode,copilot-cli,copilot-jetbrains --yes  # GitHub Copilot everywhere
codegraph install --print-config codex               # print snippet, no file writes
codegraph install --print-config copilot-vscode      # same, for Copilot in VS Code
```

| Flag | Values | Default |
|---|---|---|
| `--target` | `auto`, `all`, `none`, or csv (`claude,cursor,...`) | prompt |
| `--location` | `global`, `local` | prompt |
| `--yes` | (boolean) | prompt every step |
| `--no-permissions` | (boolean) skip Claude auto-allow list | permissions on |
| `--print-config <id>` | dump snippet for one agent and exit | — |

### 2. Restart Your Agent

Restart your agent (Claude Code / Cursor / Codex CLI / opencode / Hermes Agent / Gemini CLI / Antigravity IDE / Kiro / VS Code, the Copilot CLI, or your JetBrains IDE for GitHub Copilot) for the MCP server to load.

### 3. Initialize Projects

```bash
cd your-project
codegraph init
```

Builds the per-project knowledge graph index, which then auto-syncs on every file change. A single global `codegraph install` works in every project you open — no need to re-run the installer per project.

That's it — your agent will use CodeGraph tools automatically when a `.codegraph/` directory exists.

<details>
<summary><strong>Manual Setup (Alternative)</strong></summary>

**Install globally:**
```bash
npm install -g @colbymchenry/codegraph
```

**Add to `~/.claude.json`:**
```json
{
  "mcpServers": {
    "codegraph": {
      "type": "stdio",
      "command": "codegraph",
      "args": ["serve", "--mcp"]
    }
  }
}
```

**Add to `~/.claude/settings.json` (optional, for auto-allow):**
```json
{
  "permissions": {
    "allow": [
      "mcp__codegraph__*"
    ]
  }
}
```

<sub>One wildcard auto-approves every CodeGraph tool — `codegraph_explore` is the only one listed by default, but if you re-enable others via `CODEGRAPH_MCP_TOOLS` they're already permitted, no prompt.</sub>

</details>

<details>
<summary><strong>Agent Tool Guidance</strong></summary>

CodeGraph's MCP server delivers its usage guidance to your agent **automatically**, in the MCP `initialize` response. In short, it tells the agent to:

- **Answer structural questions directly with CodeGraph** — it *is* the pre-built index, so a grep/read loop just repeats work it already did. Treat the returned source as already read.
- **Reach for `codegraph_explore` for almost anything** — "how does X work", a flow/"how does X reach Y", or surveying an area. One call returns the relevant symbols' verbatim source grouped by file, the call paths between them (dynamic-dispatch hops included), and a blast-radius summary. Name a file or symbol in the query to read its current line-numbered source.
- **Trust the results — don't re-verify with grep**, and check the staleness banner after edits.
- Works **per project**: query any project that has a `.codegraph/` index by passing `projectPath` — so a monorepo where only some services are indexed, or a second repo, works in one session. A path with no index returns clean guidance to use built-in tools; indexing stays your decision.

The exact text is `src/mcp/server-instructions.ts` — the single source of truth for the main agent. Because subagents and non-MCP harnesses never see the MCP guidance, the installer also writes a short marker-fenced section into the agent's instructions file pointing at the `codegraph explore` CLI equivalent.

</details>

---

## How It Works

```
┌───────────────────────────────────────────────────────────────────┐
│                            Claude Code                            │
│                                                                   │
│   "How does a request reach the database?"                        │
│       calls CodeGraph tools directly — no Explore sub-agent       │
│                                 │                                 │
└─────────────────────────────────┬─────────────────────────────────┘
                                  │
                                  ▼
┌───────────────────────────────────────────────────────────────────┐
│                        CodeGraph MCP Server                       │
│                                                                   │
│ explore  ·  one call → verbatim source + call flow + blast radius │
│                                 │                                 │
│                                 ▼                                 │
│                       SQLite knowledge graph                      │
│          symbols · edges · files · FTS5 full-text search          │
└───────────────────────────────────────────────────────────────────┘
```

1. **Extraction** — a native **Rust kernel** parses source with [tree-sitter](https://tree-sitter.github.io/) grammars compiled into it, extracting nodes (functions, classes, methods) and edges (calls, imports, extends, implements) for 20 languages; remaining languages and per-file fallbacks use the same extraction logic on the portable engine, producing identical graphs.

2. **Storage** — Everything goes into a local SQLite database (`.codegraph/codegraph.db`) with FTS5 full-text search.

3. **Resolution** — After extraction, references are resolved: function calls → definitions, imports → source files, class inheritance, and framework-specific patterns.

4. **Auto-Sync** — The MCP server watches your project using native OS file events. Changes are debounced (2-second quiet window), filtered to source files only, and incrementally synced. The graph stays fresh as you code — no configuration needed.

---

## CLI Reference

```bash
codegraph                         # Run interactive installer
codegraph install                 # Run installer (explicit)
codegraph uninstall               # Remove CodeGraph from your agents AND the CLI (--keep-cli for configs only)
codegraph init [path]             # Initialize a project + build its graph (one step)
codegraph uninit [path]           # Remove CodeGraph from a project (--force to skip prompt)
codegraph index [path]            # Full index (--force to re-index, --quiet for less output)
codegraph sync [path]             # Incremental update
codegraph status [path]           # Show statistics
codegraph unlock [path]           # Remove a stale lock file that's blocking indexing
codegraph query <search>          # Search symbols (--kind, --limit, --json)
codegraph explore <query>         # Relevant symbols' source + call paths in one shot (same output as the codegraph_explore MCP tool)
codegraph node <symbol|file>      # One symbol's source + callers, or read a file with line numbers (same output as codegraph_node)
codegraph files [path]            # Show file structure (--format, --filter, --max-depth, --json)
codegraph callers <symbol>        # Find what calls a function/method (--limit, --json)
codegraph callees <symbol>        # Find what a function/method calls (--limit, --json)
codegraph impact <symbol>         # Analyze what code is affected by changing a symbol (--depth, --json)
codegraph affected [files...]     # Find test files affected by changes (see below)
codegraph daemon                  # Manage background daemons — pick one to stop (alias: daemons)
codegraph telemetry [on|off]      # Show or change anonymous usage telemetry
codegraph upgrade [version]       # Update to the latest release (--check, --force)
codegraph version                 # Print the installed version (also -v, --version)
codegraph help [command]          # Show help, optionally for one command
```

### `codegraph affected`

Traces import dependencies transitively to find which test files are affected by changed source files.

```bash
codegraph affected src/utils.ts src/api.ts         # Pass files as arguments
git diff --name-only | codegraph affected --stdin   # Pipe from git diff
codegraph affected src/auth.ts --filter "e2e/*"     # Custom test file pattern
```

| Option | Description | Default |
|--------|-------------|---------|
| `--stdin` | Read file list from stdin | `false` |
| `-d, --depth <n>` | Max dependency traversal depth | `5` |
| `-f, --filter <glob>` | Custom glob to identify test files | auto-detect |
| `-j, --json` | Output as JSON | `false` |
| `-q, --quiet` | Output file paths only | `false` |

**CI/hook example:**

```bash
#!/usr/bin/env bash
AFFECTED=$(git diff --name-only HEAD | codegraph affected --stdin --quiet)
if [ -n "$AFFECTED" ]; then
  npx vitest run $AFFECTED
fi
```

---

## MCP Tools

When running as an MCP server, CodeGraph exposes a **single tool** — `codegraph_explore`. Measured agent behavior showed that one strong tool steers agents better than a menu of narrower ones — fewer mis-picks, and it saves context every session:

| Tool | Purpose |
|------|---------|
| `codegraph_explore` | Answer almost any question in one call — "how does X work", a flow ("how does X reach Y"), or surveying an area — returning the relevant symbols' verbatim source grouped by file, plus the call paths between them and a blast-radius summary. Surfaces dynamic-dispatch hops (callbacks, React re-render, interface→impl) grep can't follow. Name a file or symbol in the query to read its current line-numbered source, the same shape the Read tool gives you. |

The other tools (`codegraph_node`, `codegraph_search`, `codegraph_callers`, `codegraph_callees`, `codegraph_impact`, `codegraph_files`, `codegraph_status`) stay fully functional but **unlisted by default** — everything they return already arrives inline on `codegraph_explore` (its blast-radius section, the relationship map, a symbol's body as its callee list). Re-enable any of them for the MCP surface with the `CODEGRAPH_MCP_TOOLS` environment variable (e.g. `CODEGRAPH_MCP_TOOLS=explore,node,search,callers`), or use their CLI equivalents (`codegraph node` / `query` / `callers` / `callees` / `impact` / `files` / `status`).

Even when the server's own root has no `.codegraph/` index, the tools stay available: pass `projectPath` to query any indexed project — a sub-service in a monorepo, or a second repo — in the same session. A path that has no index returns clean guidance to use built-in tools instead, so nothing fails loudly, and indexing stays your decision.

---

## Library Usage

CodeGraph can be embedded directly. The npm package re-exports its programmatic
API, so both `import` and `require` resolve the `CodeGraph` class in your own
process — handy for embedding it in an app (e.g. an Electron main process).

```typescript
import CodeGraph from '@colbymchenry/codegraph';
// CommonJS works too:
//   const { CodeGraph } = require('@colbymchenry/codegraph');

const cg = await CodeGraph.init('/path/to/project');
// Or: const cg = await CodeGraph.open('/path/to/project');

await cg.indexAll({
  onProgress: (p) => console.log(`${p.phase}: ${p.current}/${p.total}`)
});

const results = cg.searchNodes('UserService');
const callers = cg.getCallers(results[0].node.id);
const context = await cg.buildContext('fix login bug', { maxNodes: 20, includeCode: true, format: 'markdown' });
const impact = cg.getImpactRadius(results[0].node.id, 2);

cg.watch();   // auto-sync on file changes
cg.unwatch(); // stop watching
cg.close();
```

Lower-level building blocks are exported from the same entry point for callers
that drive the graph directly: `DatabaseConnection`, `QueryBuilder`,
`getDatabasePath`, `initGrammars` / `loadGrammarsForLanguages`, and `FileLock`.

**Embedding requirements**

- Install from npm (`npm i @colbymchenry/codegraph`) so the matching
  per-platform package — which carries the compiled library and its
  dependencies — is fetched alongside the shim.
- The API runs on **your** runtime, so it needs **Node 22.5+** for the built-in
  `node:sqlite` (Electron qualifies when its bundled Node is 22.5+). The CLI and
  MCP server are unaffected — they run on the self-contained bundled runtime.
- TypeScript types ship with the package. As with any Node-targeting library,
  keep `@types/node` available and `skipLibCheck: true` (the common default).

---

## Configuration

Next to none — CodeGraph is **zero-config by default**, with nothing to write or
keep in sync to get started. Language support is automatic from the file
extension; there's nothing to wire up per language. The one optional file is for
mapping [custom file extensions](#custom-file-extensions).

What it skips out of the box:

- **Dependency, build, and cache directories** — `node_modules`, `vendor`,
  `dist`, `build`, `target`, `.venv`, `Pods`, `.next`, and the like across every
  [supported stack](#supported-languages) — so the graph is your code, not
  third-party noise. This holds even with no `.gitignore`.
- **Anything in your `.gitignore`** — honored in git repos via git, and in
  non-git projects by reading `.gitignore` directly (root and nested).
- **Files larger than 1 MB** — generated bundles, minified JS, vendored blobs.

To keep something else out, add it to `.gitignore`. To pull a default-excluded
directory back **in** (say you really do want a vendored dependency indexed),
add a negation — `!vendor/`. The defaults apply uniformly, so committing a
dependency or build directory doesn't force it into the graph; the `.gitignore`
negation is the explicit opt-in.

`.gitignore` can't drop a directory you've **committed**, though. For a vendored
theme or SDK that's checked into the repo (e.g. a Metronic theme under
`static/`), list it under `exclude` in `codegraph.json` — gitignore-style
patterns, matched against repo-root-relative paths, honored on index, sync, and
watch:

```json
{
  "exclude": ["static/", "**/vendor/**"]
}
```

Conversely, when real source is gitignored on purpose — a project under a second
VCS (SVN, Perforce) that `.gitignore`s its own source so it stays out of Git —
force it back in with `include` (the opposite of `exclude`; `includeIgnored`
only revives embedded git repos, not plain source):

```json
{
  "include": ["Tools/", "Local/typescript/"]
}
```

CodeGraph discovers those files off disk, overriding `.gitignore`, on index,
sync, and watch. An explicit `exclude` still wins, and built-in skips
(`node_modules`, `dist`, `.git`) are never re-included.

### Custom file extensions

If your project uses a non-standard extension for a [supported
language](#supported-languages) — say `.dota_lua` for Lua, or `.tpl` for PHP —
those files are skipped by default, because the extension isn't one CodeGraph
recognizes. Map them with an optional **`codegraph.json`** at your project root:

```json
{
  "extensions": {
    ".dota_lua": "lua",
    ".tpl": "php"
  }
}
```

Each value is a supported language id. The mappings merge on top of the built-in
defaults and win on conflict, so you can also re-point a built-in (e.g.
`".h": "cpp"`). Commit the file to share the mapping with your team. A typo'd
language or a malformed file is warned about and skipped — it never breaks
indexing — and a project with no `codegraph.json` behaves exactly as before.
Re-index (`codegraph index`) after adding or changing mappings.

## Telemetry

CodeGraph collects **anonymous usage statistics** — which tools and commands get
used, which languages get indexed — to guide where language and agent support
work goes. **Never** any code, paths, file or symbol names, queries, or IP
addresses; usage is aggregated locally into daily totals before anything is
sent, and the ingest endpoint is [public code in this repo](telemetry-worker/)
that enforces the documented field list. The installer asks up front; turn it
off any time:

```bash
codegraph telemetry off    # or: CODEGRAPH_TELEMETRY=0, or DO_NOT_TRACK=1
```

[`TELEMETRY.md`](TELEMETRY.md) lists every field, with the off-switches and the
full data-handling story.

## Verified releases

Every artifact is built and published by the public
[Release workflow](.github/workflows/release.yml) — never from a laptop — and
carries cryptographic proof of it:

- **npm packages** are published via [trusted publishing](https://docs.npmjs.com/trusted-publishers)
  (OIDC — no long-lived npm tokens exist that could be stolen) with
  [provenance attestations](https://docs.npmjs.com/generating-provenance-statements)
  linking every version to the exact commit and workflow run that built it.
  Verify what's installed:

  ```bash
  npm audit signatures
  ```

- **GitHub Release bundles** (and `SHA256SUMS`) carry signed
  [build attestations](https://docs.github.com/en/actions/security-for-github-actions/using-artifact-attestations)
  (SLSA v1.0 Build Level 2). Verify any downloaded bundle:

  ```bash
  gh attestation verify codegraph-darwin-arm64.tar.gz -R colbymchenry/codegraph
  ```

Releases published before July 2026 predate this pipeline and don't carry
attestations.

## Supported Platforms

Every release ships a self-contained build (bundled Node runtime — nothing to
compile) for all three desktop OSes, on both Intel/AMD (x64) and ARM (arm64):

| Platform | Architectures | Install |
|----------|---------------|---------|
| Windows | x64, arm64 | PowerShell installer or npm |
| macOS | x64, arm64 | shell installer or npm |
| Linux | x64, arm64 | shell installer or npm |

See [Get Started](#get-started) for the one-line install commands.

## Supported Agents

The interactive installer auto-detects and configures each of these — wiring up
the MCP server (which delivers its own usage guidance, so no instructions file
is written):

- **Claude Code**
- **Cursor**
- **Codex CLI**
- **opencode**
- **Hermes Agent**
- **Gemini CLI**
- **Antigravity IDE**
- **Kiro**
- **GitHub Copilot** — Copilot Chat in VS Code (`copilot-vscode`), the Copilot CLI (`copilot-cli`), and the Copilot plugin in JetBrains IDEs (`copilot-jetbrains`)

## Supported Languages

| Language | Extension | Status |
|----------|-----------|--------|
| TypeScript | `.ts`, `.tsx` | Full support |
| JavaScript | `.js`, `.jsx`, `.mjs` | Full support |
| ArkTS (HarmonyOS) | `.ets` | Full support (everything TypeScript has, plus `@Component`/`@ComponentV2` structs with their ArkUI decorators (`@State`/`@Prop`/`@Link`/`@Local`/`@Builder`/…), `build()` view trees — parent→child component edges, chained-attribute links to `@Extend`/`@Styles` functions, `.onClick(this.handler)` event bindings — dynamic-dispatch bridges for state→`build()` re-renders, `@ohos.events.emitter` emit→subscriber pairs (static event keys only), and `router.pushUrl` literal urls → the target page struct; ohpm workspace modules resolve bare `import { X } from "data"` through `oh-package.json5` `file:` dependencies, honoring each module's `main` entry) |
| Python | `.py` | Full support |
| Go | `.go` | Full support |
| Rust | `.rs` | Full support |
| Java | `.java` | Full support |
| C# | `.cs` | Full support |
| PHP | `.php` | Full support |
| Ruby | `.rb` | Full support |
| C | `.c`, `.h` | Full support |
| C++ | `.cpp`, `.hpp`, `.cc` | Full support |
| Objective-C | `.m`, `.mm`, `.h` | Partial support (classes, protocols, methods, `@property`, `#import`, message sends; `.mm` ObjC++ may parse incompletely) |
| Metal | `.metal` | Full support (vertex/fragment/kernel functions, structs, type aliases, call edges — MSL parses as C++, with `[[attribute]]` annotations handled) |
| CUDA | `.cu`, `.cuh` | Full support (kernels and device/host functions, structs, classes, host→kernel call edges through `<<<grid, block>>>` launch syntax — templated launches, function-pointer launches (`auto kernel = &fn<...>`), `dim3{...}` configs, and macro-defined kernels included; `__global__`/`__device__`/`__launch_bounds__` specifiers handled; CUDA in plain `.h`/`.hpp` headers recognized by content) |
| Swift | `.swift` | Full support |
| Kotlin | `.kt`, `.kts` | Full support |
| Scala | `.scala`, `.sc` | Full support (classes, traits, methods, type aliases, Scala 3 enums) |
| Dart | `.dart` | Full support |
| Svelte | `.svelte` | Full support (script extraction, Svelte 5 runes, SvelteKit routes) |
| Vue | `.vue` | Full support (script + script-setup extraction, Nuxt page/API/middleware routes) |
| Astro | `.astro` | Full support (frontmatter + script extraction, template component/call references, `src/pages/` routes) |
| Liquid | `.liquid` | Full support |
| Pascal / Delphi | `.pas`, `.dpr`, `.dpk`, `.lpr` | Full support (classes, records, interfaces, enums, DFM/FMX form files) |
| Lua | `.lua` | Full support (functions, methods with receivers, local variables, `require` imports, call edges) |
| R | `.R` `.r` | Full support (functions in every assignment form, S4/R5/R6 classes with methods, `library`/`require` imports, `source()` file references, call edges) |
| Luau | `.luau` | Full support (everything in Lua, plus `type`/`export type` aliases, typed signatures, and Roblox instance-path `require`) |
| CFML | `.cfc`, `.cfm`, `.cfs` | Full support (tag-based `<cfcomponent>`/`<cffunction>` and bare-script `component { ... }` styles, `extends`/`implements`, embedded `<cfscript>` delegation, call edges) |
| COBOL | `.cbl`, `.cob`, `.cpy` | Full support (programs, sections/paragraphs with PERFORM/GO TO call edges, CALL 'literal' cross-program calls, COPY copybook imports — including standalone `.cpy` files — DATA DIVISION records/fields/88-levels, EXEC CICS LINK/XCTL and EXEC SQL INCLUDE targets; fixed and free format) |
| Visual Basic .NET | `.vb` | Full support (classes, Modules, interfaces, structures, enums, properties, events, `Declare` P/Invoke, `Handles`/`WithEvents`, `Inherits`/`Implements` edges, call edges through VB's call/index paren ambiguity, `As New` instantiation, interpolated strings, LINQ, Unicode identifiers) |
| Erlang | `.erl`, `.hrl`, `.escript`, `.app.src`, `.app` | Full support (functions with multi-clause/multi-arity grouping, `-spec` signatures, records with fields, `-type`/`-opaque` aliases, `-define` macros, `-include`/`-include_lib`/`-import` edges, local and `mod:fn` remote call edges, `fun name/arity` references, `spawn`/`apply`/`proc_lib`/`timer`/`rpc` MFA-argument call edges, `gen_server:call/cast(?MODULE)` → own `handle_call`/`handle_cast` links, `-behaviour` links, `-export`-based visibility) |
| Solidity | `.sol` | Full support (contracts, libraries, interfaces, structs, enums, modifiers, events, errors, state variables, `import`/`using` directives, `emit`/`revert` calls) |
| Terraform / OpenTofu | `.tf`, `.tfvars`, `.tofu` | Full support (resources, data sources, modules, variables, outputs, providers incl. aliases, `locals`; `var.`/`local.`/`module.`/resource references with Terraform's per-directory scoping enforced; module calls bridged across the boundary — inputs to the child module's variables, `module.M.out` to the child's output, `source` to the module's files; cloudposse/atmos `remote-state` cross-component wiring when the component is statically named; `provider = aws.east` selections resolved up the module tree; `moved`/`import`/`removed`/`check` block references; `.tfvars` assignments linked to the variables they set) |
| Nix | `.nix` | Full support (functions with simple/destructured/curried params, `let`/attrset bindings, `inherit`, `import ./path` file edges — `./dir` resolving through `default.nix` — plus NixOS module `imports = [ ./x.nix ]` lists and `callPackage ./pkg.nix` file edges; call edges; module-system option wiring — a config write like `launchd.user.agents.x = { ... }` links to the module declaring `options.launchd.user.agents`, so option flows trace across modules) |

## Measured cross-file coverage

Impact and blast-radius queries are only as good as the dependency graph behind them, so coverage is measured rather than asserted. **Fair coverage** = the share of symbol-bearing source files that have at least one *resolved cross-file dependent* — something that imports, calls, references, or (through a framework convention) routes to them — on a real-world benchmark repo per language. The residual is always a genuine static-analysis frontier (runtime dynamic dispatch, reflection / DI containers, framework-convention entry points, vendored third-party code), never hidden by gaming the denominator.

| Language | Benchmark repo | Coverage |
|---|---|---|
| TypeScript / JavaScript | this repo | 95.8% |
| Python | psf/requests | 100% |
| Go | gin-gonic/gin | 96.6% |
| Rust | BurntSushi/ripgrep | 86.7% |
| Java | google/gson | 93.3% |
| C# | jbogard/MediatR | 85.2% |
| PHP | guzzle/guzzle | 100% |
| Ruby | sidekiq/sidekiq | 100% |
| C | redis/redis | 92.2% |
| C++ | google/leveldb | 94.8% |
| Objective-C | SDWebImage | 91.6% |
| Swift | Alamofire | 95.3% |
| Kotlin | square/okhttp | 96.2% |
| Scala | gatling/gatling | 91.2% |
| Dart | flutter/packages | 92.4% |
| Svelte / SvelteKit | sveltejs/realworld | 100% |
| Vue / Nuxt | nuxt/movies | 93.5% |
| Astro | xingwangzhe/stalux | 93.0% |
| Lua | nvim-telescope/telescope.nvim | 84.2% |
| Luau | dphfox/Fusion | 92.2% |
| Liquid | Shopify/dawn | 73.8% |
| Pascal / Delphi | PascalCoin | 77.4% |

Framework routing is validated the same way, on a canonical app per framework: Express 100%, FastAPI 98%, Flask 100%, NestJS 96.8%, Gin 96.5%, Axum 100%, Rocket 93.8%, Vapor 100%, Laravel 92%, Rails 89.6%, React Router 100% — and the convention/reflection-heavy ones at their honest static-analysis ceiling: ASP.NET 83.9%, Spring 83.3%, Drupal 78.9%, Play 76.3%, Django 74.1%. SvelteKit, Vue/Nuxt, and Astro use file-based routing, so their page/endpoint coverage is the Svelte/SvelteKit (100%), Vue/Nuxt (93.5%), and Astro (93.0% — every `src/pages/` file maps to a route node on the two validation repos) figures in the table above.

## Troubleshooting

**"CodeGraph not initialized"** — Run `codegraph init` in your project directory first.

**Indexing is slow** — Check that `node_modules` and other large directories are excluded. Use `--quiet` to reduce output overhead.

**MCP hits `database is locked`** — current builds shouldn't: CodeGraph bundles its own Node runtime and uses Node's built-in `node:sqlite` in WAL mode, where concurrent reads never block on a writer. If you still see it:

- **You're on an old (pre-0.9) install.** Reinstall to get the bundled runtime — `curl -fsSL https://raw.githubusercontent.com/colbymchenry/codegraph/main/install.sh | sh` (macOS/Linux), `irm https://raw.githubusercontent.com/colbymchenry/codegraph/main/install.ps1 | iex` (Windows), or `npm i -g @colbymchenry/codegraph@latest`.
- **`codegraph status` shows `Journal:` other than `wal`** — WAL couldn't be enabled on this filesystem (common on network shares and WSL2 `/mnt`), so reads can block on writes. Move the project (with its `.codegraph/` folder) onto a local disk.

**MCP server not connecting** — Your agent starts the server itself, so you don't launch it by hand. Make sure the project is initialized and indexed (`codegraph status`) and that the path in your MCP config is correct. If it still won't connect, re-run `codegraph install` to rewrite the config.

**MCP tool calls fail with `Transport closed` while `codegraph status`/`sync` are healthy** — almost always WSL2 with the project on a Windows drive (a `/mnt/c` or `/mnt/d` path), where the local socket CodeGraph uses to share one background server across sessions is unreliable. CodeGraph now falls back to serving the session in-process instead of dropping the connection, but if you still hit it, set `CODEGRAPH_NO_DAEMON=1` in your MCP server's environment to skip the shared server entirely (each session runs in its own process). Moving the project onto the Linux-native filesystem (e.g. under `~/` instead of `/mnt/`) restores the shared server.

**Missing symbols** — The MCP server auto-syncs on save (wait a couple seconds). Run `codegraph sync` manually if needed. Check that the file's language is supported and isn't inside a `.gitignore`d or default-excluded directory (e.g. `node_modules`, `dist`).

**Sharing one checkout between Windows and WSL** — Don't point both at the same `.codegraph/`: the background-server lock and the SQLite index are tied to the OS that wrote them, and SQLite locking across the WSL2/Windows filesystem boundary is unreliable. Give each side its own index in the same tree by setting `CODEGRAPH_DIR` to a distinct name on one of them — e.g. `CODEGRAPH_DIR=.codegraph-win` on Windows, leaving WSL on the default `.codegraph`. CodeGraph skips any sibling `.codegraph-*` directory when indexing and watching, so the two never trip over each other.

## License

MIT

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