# @agent-orchestrator/core

Core services, types, and configuration for the Agent Orchestrator system.

## What's Here

- **`src/types.ts`** — All TypeScript interfaces (Runtime, Agent, Workspace, Tracker, SCM, Notifier, Terminal, Session, events)
- **`src/services/`** — Core services (SessionManager, LifecycleManager, PluginRegistry)
- **`src/config.ts`** — Configuration loading + Zod schemas
- **`src/utils/`** — Shared utilities (shell escaping, metadata parsing, etc.)

## Key Files

### `src/types.ts` — The Source of Truth

Every interface the system uses is defined here. If you're working on any part of the orchestrator, start by reading this file.

**Main interfaces:**

- `Runtime` — where sessions execute (tmux, docker, k8s)
- `Agent` — AI coding tool adapter (claude-code, codex, aider)
- `Workspace` — code isolation (worktree, clone)
- `Tracker` — issue tracking (GitHub Issues, Linear)
- `SCM` — PR/CI/reviews (GitHub, GitLab)
- `Notifier` — push notifications (desktop, Slack, webhook)
- `Terminal` — human interaction UI (iTerm2, web)
- `Session` — running agent instance (state, metadata, handles)
- `OrchestratorEvent` — events emitted by lifecycle manager
- `PluginModule` — what every plugin exports

### `src/services/session-manager.ts` — Session CRUD

Handles session lifecycle:

- `spawn(config)` — create new session (workspace + runtime + agent)
- `list(projectId?)` — list all sessions
- `get(sessionId)` — get session details
- `kill(sessionId)` — terminate session
- `cleanup(projectId?)` — kill completed/merged sessions
- `send(sessionId, message)` — send message to agent

**Data flow in `spawn()`:**

1. Load project config
2. **Validate issue exists** via `Tracker.getIssue()` (if issueId provided, fails-fast if not found)
3. Reserve session ID
4. Determine branch name
5. Create workspace via `Workspace.create()`
6. Generate prompt via `Tracker.generatePrompt()`
7. Build launch command via `Agent.getLaunchCommand()`
8. Create runtime session via `Runtime.create()`
9. Run `Agent.postLaunchSetup()` (optional)
10. Write metadata file
11. Return Session object

**Note:** If issue validation fails (not found, auth error), spawn fails before creating any resources (no workspace, no runtime, no session ID). This prevents spawning sessions with broken issue references.

### `src/services/lifecycle-manager.ts` — State Machine + Reactions

Polls sessions, detects state changes, triggers reactions:

**State machine:**

```
spawning → working → pr_open → ci_failed/review_pending/approved → mergeable → merged
```

**Reactions:**

- `ci-failed` → send fix prompt to agent
- `changes-requested` → send review comments to agent
- `approved-and-green` → notify human (or auto-merge)
- `agent-stuck` → notify human

**Polling loop:**

1. For each session: check agent activity state (`Agent.getActivityState()`)
2. If PR exists: check CI status (`SCM.getCISummary()`), review state (`SCM.getReviewDecision()`)
3. Update session status based on state
4. Trigger reactions if state changed
5. Emit events

### `src/services/plugin-registry.ts` — Plugin Discovery + Loading

Loads plugins and provides access to them:

- `register(plugin, config?)` — register a plugin instance
- `get<T>(slot, name)` — get plugin by slot + name
- `list(slot)` — list all plugins for a slot
- `loadBuiltins(config?)` — load built-in plugins (runtime-tmux, agent-claude-code, etc.)
- `loadFromConfig(config)` — load plugins from config (npm packages, local paths)

**Built-in plugins** (loaded by default):

- runtime-tmux, runtime-process
- agent-claude-code, agent-codex, agent-aider, agent-opencode
- workspace-worktree, workspace-clone
- tracker-github, tracker-linear
- scm-github
- notifier-desktop, notifier-slack, notifier-composio, notifier-webhook
- terminal-iterm2, terminal-web

### `src/config.ts` — Configuration Loading

Loads and validates `agent-orchestrator.yaml`:

**Main config sections:**

- `dataDir` — where session metadata lives (~/.agent-orchestrator)
- `worktreeDir` — where workspaces are created (~/.worktrees)
- `port` — web dashboard port (default 3000, set different values for multiple projects)
- `terminalPort` — terminal WebSocket port (auto-detected if not set)
- `directTerminalPort` — direct terminal WebSocket port (auto-detected if not set)
- `defaults` — default plugins (runtime, agent, workspace, notifiers)
- `projects` — per-project config (repo, path, branch, symlinks, reactions, agentRules)
- `notifiers` — notification channel config (Slack webhooks, etc.)
- `notificationRouting` — which notifiers get which priority events
- `reactions` — auto-response config (ci-failed, changes-requested, approved-and-green, etc.)

**Zod schemas** validate all config at load time.

## Common Tasks

### Adding a Field to Session

1. Edit `src/types.ts` → `Session` interface
2. Edit `src/services/session-manager.ts` → initialize field in `spawn()`
3. Rebuild: `pnpm --filter @agent-orchestrator/core build`

### Adding an Event Type

1. Edit `src/types.ts` → `EventType` union
2. Emit the event: `eventEmitter.emit()` in relevant service
3. Add reaction handler (optional): `src/services/lifecycle-manager.ts`

### Adding a Reaction

1. Edit `src/services/lifecycle-manager.ts` → add handler function
2. Wire it up in the polling loop
3. Add config schema in `src/config.ts` if new reaction type

## Testing

```bash
# Run all core tests
pnpm --filter @agent-orchestrator/core test

# Run in watch mode
pnpm --filter @agent-orchestrator/core test -- --watch

# Run specific test
pnpm --filter @agent-orchestrator/core test -- session-manager.test.ts
```

Tests are in `src/__tests__/`:

- `session-manager.test.ts` — session CRUD, spawn, cleanup
- `lifecycle-manager.test.ts` — state machine, reactions
- `plugin-registry.test.ts` — plugin loading, resolution
- `tmux.test.ts` — tmux utility functions (not a plugin test)
- `prompt-builder.test.ts` — prompt generation utilities

## Building

```bash
# Build core
pnpm --filter @agent-orchestrator/core build

# Typecheck
pnpm --filter @agent-orchestrator/core typecheck
```

This package is a dependency of all other packages. Build it first if working on the codebase.

## Architecture Notes

**Why flat metadata files?**

- Debuggability: `cat ~/.agent-orchestrator/my-app-3` shows full state
- No database dependency (survives crashes, easy to inspect)
- Backwards-compatible with bash script orchestrator

**Why polling instead of webhooks?**

- Simpler (no webhook setup, no ngrok for local dev)
- Works offline (CI/review state is fetched, not pushed)
- Survives orchestrator restarts (no missed events)

**Why plugin slots?**

- Swappability: use tmux locally, docker in CI, k8s in prod
- Testability: mock plugins for tests
- Extensibility: users can add custom plugins (e.g., company-specific notifier)
