# CodeGraph Integration

## What is CodeGraph?

Local-first code-intelligence tool that turns the codebase into a queryable SQLite knowledge graph exposed over MCP. Lets AI agents (Claude Code, Cursor) navigate the code graph instead of scanning files — dramatically fewer tool calls.

## Why contributors use it here

- TypeScript plugin with layered architecture; CodeGraph maps import chains and call edges across `src/behaviors/`, `src/roborockCommunication/`, `src/share/` without grep sweeps.
- Agents can trace handler chains (`behaviorConfig` → handlers → `presetCleanModeHandler`) in one query rather than reading every file.

## One-time setup (per machine)

### Install the CLI

```sh
npm i -g @colbymchenry/codegraph
# or, no Node required:
curl -fsSL https://raw.githubusercontent.com/colbymchenry/codegraph/main/install.sh | sh
```

### Wire up your agent(s)

This repo ships project-local agent config:

| Agent           | Config                                                                                          |
| --------------- | ----------------------------------------------------------------------------------------------- |
| **Claude Code** | `.mcp.json` + CodeGraph section in `.claude/CLAUDE.md` + permissions in `.claude/settings.json` |
| **Cursor**      | `AGENTS.md` (`@.cursor/CURSOR.md`) + `.cursor/mcp.json`                                         |

You still need the CodeGraph CLI on your PATH and a restart of your agent after first clone. If you prefer global install instead:

```sh
codegraph install
```

That writes to `~/.claude.json` / `~/.cursor/mcp.json` — the committed project config above is sufficient for this repo.

### Avoid duplicate MCP servers

If you already ran `codegraph install` globally **and** use this repo's committed `.mcp.json` / `.cursor/mcp.json`, you may see CodeGraph listed twice in your agent's MCP panel. That is harmless but noisy — remove the duplicate entry from your global config (`~/.cursor/mcp.json` or `~/.claude.json`) and rely on the project-local files instead.

## Per-clone project setup

From the repo root:

```sh
npm run codegraph:init
# or: codegraph init
```

Creates `.codegraph/` and builds the full index in one step. Check health anytime with `npm run codegraph:status`. Re-run init after large refactors or when the agent reports stale symbol data.

## Key areas to explore in this repo

| Area                  | Path                                                             | What to query              |
| --------------------- | ---------------------------------------------------------------- | -------------------------- |
| Clean mode pipeline   | `src/behaviors/roborock.vacuum/`                                 | handler chain, mode config |
| Device model registry | `src/roborockCommunication/models/`                              | DeviceModel enum entries   |
| Capability registry   | `src/behaviors/roborock.vacuum/core/deviceCapabilityRegistry.ts` | device→modes map           |
| Shared utilities      | `src/share/`                                                     | cross-cutting helpers      |

## Impact analysis before changes

Before editing a symbol, use:

```sh
codegraph impact <symbol>
```

This traces callers, callees, and the full impact radius — useful before touching `BehaviorConfig`, `ModeHandler` implementations, or shared types in `src/share/`.

## Vitest workflow with `codegraph affected`

Run only tests impacted by your current diff:

```sh
npm run test:affected
```

Manual equivalent:

```sh
AFFECTED=$(git diff --name-only HEAD | codegraph affected --stdin --quiet)
if [ -n "$AFFECTED" ]; then npm test -- $AFFECTED; fi
```

Or pass changed source files directly:

```sh
codegraph affected src/behaviors/roborock.vacuum/core/behaviorConfig.ts
```

Full suite: `npm test`

## npm scripts

| Script                     | Command                                      |
| -------------------------- | -------------------------------------------- |
| `npm run codegraph:init`   | Build `.codegraph/` index (`codegraph init`) |
| `npm run codegraph:status` | Show index health and pending sync           |
| `npm run test:affected`    | Run vitest on tests affected by `git diff`   |

## Git hygiene — do not commit `.codegraph/`

The `.codegraph/` directory is a local machine-specific index. It is already listed in `.gitignore`. Never commit it.

## Optional: `codegraph.json`

A project-local `codegraph.json` is only needed to customise exclusion patterns or language hints. The default auto-detection works correctly for this TypeScript project — no `codegraph.json` is required.