evals-context

# Evals Codebase Context

## When to Use This Skill

Use this skill when the task involves:

- Modifying or debugging the evals execution infrastructure
- Adding new eval exercises or languages
- Working with the evals web interface (apps/web-evals)
- Modifying the public evals display page on roocode.com
- Understanding where evals code lives in this monorepo

## When NOT to Use This Skill

Do NOT use this skill when:

- Working on unrelated parts of the codebase (extension, webview-ui, etc.)
- The task is purely about the VS Code extension's core functionality
- Working on the main website pages that don't involve evals

## Key Disambiguation: Two "Evals" Locations

This monorepo has **two distinct evals-related locations** that can cause confusion:

| Component                   | Path                                                           | Purpose                                                        |
| --------------------------- | -------------------------------------------------------------- | -------------------------------------------------------------- |
| **Evals Execution System**  | `packages/evals/`                                              | Core eval infrastructure: CLI, DB schema, Docker configs       |
| **Evals Management UI**     | `apps/web-evals/`                                              | Next.js app for creating/monitoring eval runs (localhost:3446) |
| **Website Evals Page**      | `apps/web-roo-code/src/app/evals/`                             | Public roocode.com page displaying eval results                |
| **External Exercises Repo** | [Roo-Code-Evals](https://github.com/RooCodeInc/Roo-Code-Evals) | Actual coding exercises (NOT in this monorepo)                 |

## Directory Structure Reference

### `packages/evals/` - Core Evals Package

```
packages/evals/
├── ARCHITECTURE.md          # Detailed architecture documentation
├── ADDING-EVALS.md          # Guide for adding new exercises/languages
├── README.md                # Setup and running instructions
├── docker-compose.yml       # Container orchestration
├── Dockerfile.runner        # Runner container definition
├── Dockerfile.web           # Web app container
├── drizzle.config.ts        # Database ORM config
├── src/
│   ├── index.ts             # Package exports
│   ├── cli/                 # CLI commands for running evals
│   │   ├── runEvals.ts      # Orchestrates complete eval runs
│   │   ├── runTask.ts       # Executes individual tasks in containers
│   │   ├── runUnitTest.ts   # Validates task completion via tests
│   │   └── redis.ts         # Redis pub/sub integration
│   ├── db/
│   │   ├── schema.ts        # Database schema (runs, tasks)
│   │   ├── queries/         # Database query functions
│   │   └── migrations/      # SQL migrations
│   └── exercises/
│       └── index.ts         # Exercise loading utilities
└── scripts/
    └── setup.sh             # Local macOS setup script
```

### `apps/web-evals/` - Evals Management Web App

```
apps/web-evals/
├── src/
│   ├── app/
│   │   ├── page.tsx         # Home page (runs list)
│   │   ├── runs/
│   │   │   ├── new/         # Create new eval run
│   │   │   └── [id]/        # View specific run status
│   │   └── api/runs/        # SSE streaming endpoint
│   ├── actions/             # Server actions
│   │   ├── runs.ts          # Run CRUD operations
│   │   ├── tasks.ts         # Task queries
│   │   ├── exercises.ts     # Exercise listing
│   │   └── heartbeat.ts     # Controller health checks
│   ├── hooks/               # React hooks (SSE, models, etc.)
│   └── lib/                 # Utilities and schemas
```

### `apps/web-roo-code/src/app/evals/` - Public Website Evals Page

```
apps/web-roo-code/src/app/evals/
├── page.tsx      # Fetches and displays public eval results
├── evals.tsx     # Main evals display component
├── plot.tsx      # Visualization component
└── types.ts      # EvalRun type (extends packages/evals types)
```

This page **displays** eval results on the public roocode.com website. It imports types from `@roo-code/evals` but does NOT run evals.

## Architecture Overview

The evals system is a distributed evaluation platform that runs AI coding tasks in isolated VS Code environments:

```
┌─────────────────────────────────────────────────────────────┐
│  Web App (apps/web-evals)  ──────────────────────────────── │
│        │                                                    │
│        ▼                                                    │
│  PostgreSQL ◄────► Controller Container                     │
│        │               │                                    │
│        ▼               ▼                                    │
│     Redis ◄───► Runner Containers (1-25 parallel)           │
└─────────────────────────────────────────────────────────────┘
```

**Key components:**

- **Controller**: Orchestrates eval runs, spawns runners, manages task queue (p-queue)
- **Runner**: Isolated Docker container with VS Code + Roo Code extension + language runtimes
- **Redis**: Pub/sub for real-time events (NOT task queuing)
- **PostgreSQL**: Stores runs, tasks, metrics

## Common Tasks Quick Reference

### Adding a New Eval Exercise

1. Add exercise to [Roo-Code-Evals](https://github.com/RooCodeInc/Roo-Code-Evals) repo (external)
2. See [`packages/evals/ADDING-EVALS.md`](packages/evals/ADDING-EVALS.md) for structure

### Modifying Eval CLI Behavior

Edit files in [`packages/evals/src/cli/`](packages/evals/src/cli/):

- [`runEvals.ts`](packages/evals/src/cli/runEvals.ts) - Run orchestration
- [`runTask.ts`](packages/evals/src/cli/runTask.ts) - Task execution
- [`runUnitTest.ts`](packages/evals/src/cli/runUnitTest.ts) - Test validation

### Modifying the Evals Web Interface

Edit files in [`apps/web-evals/src/`](apps/web-evals/src/):

- [`app/runs/new/new-run.tsx`](apps/web-evals/src/app/runs/new/new-run.tsx) - New run form
- [`actions/runs.ts`](apps/web-evals/src/actions/runs.ts) - Run server actions

### Modifyi