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	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 repo (external)
2. See packages/evals/ADDING-EVALS.md for structure

Modifying Eval CLI Behavior

Edit files in packages/evals/src/cli/:

• runEvals.ts - Run orchestration
• runTask.ts - Task execution
• runUnitTest.ts - Test validation

Modifying the Evals Web Interface

Edit files in apps/web-evals/src/:

• app/runs/new/new-run.tsx - New run form
• actions/runs.ts - Run server actions

Modifying the Public Evals Display Page

Edit files in apps/web-roo-code/src/app/evals/:

• evals.tsx - Display component
• plot.tsx - Charts

Database Schema Changes

1. Edit packages/evals/src/db/schema.ts
2. Generate migration: cd packages/evals && pnpm drizzle-kit generate
3. Apply migration: pnpm drizzle-kit migrate

Running Evals Locally

# From repo root
pnpm evals

# Opens web UI at http://localhost:3446

Ports (defaults):

• PostgreSQL: 5433
• Redis: 6380
• Web: 3446

Testing

# packages/evals tests
cd packages/evals && npx vitest run

# apps/web-evals tests
cd apps/web-evals && npx vitest run

Key Types/Exports from @roo-code/evals

The package exports are defined in packages/evals/src/index.ts:

• Database queries: getRuns, getTasks, getTaskMetrics, etc.
• Schema types: Run, Task, TaskMetrics
• Used by both apps/web-evals and apps/web-roo-code