# ClaudeDo.Worker

ASP.NET Core hosted service that executes tasks via Claude CLI in isolated environments.

## Architecture

- **Program.cs** — loads config, inits schema, registers DI, configures SignalR on `/hub`, binds to `127.0.0.1:47821`
- **QueueService** — `BackgroundService` with two execution slots:
  - Queue slot: FIFO sequential processing of "agent"-tagged queued tasks
  - Override slot: immediate execution via `RunNow(taskId)`
  - Wake signaling via `SemaphoreSlim`, backstop timer (30s default)
- **StaleTaskRecovery** — startup-only service, flips orphaned "running" tasks to "failed"

## Task Execution Pipeline

`TaskRunner` orchestrates:
1. Load task + list metadata from DB; resolve config from `list_config` + task-level overrides (model, system_prompt, agent_path)
2. Create worktree (if `WorkingDir` set) or sandbox directory
3. Mark task "running", broadcast `TaskStarted`
4. Build CLI args via `ClaudeArgsBuilder`; invoke `ClaudeProcess` with task prompt
5. Stream NDJSON output through `StreamAnalyzer`; lines forwarded to log file and SignalR (`TaskMessage`)
6. On success: auto-commit changes (worktree only), store run record, mark "done"
7. On failure: retry once if session ID available (`--resume`), then mark "failed"

## Key Components

- **ClaudeProcess** — spawns `claude -p --output-format stream-json --verbose --dangerously-skip-permissions`. Writes prompt to stdin, reads NDJSON from stdout. Supports CancellationToken (kills process tree).
- **ClaudeArgsBuilder** — dynamically constructs CLI args; supports `--model`, `--append-system-prompt`, `--agents`, `--json-schema`, `--resume`
- **StreamAnalyzer** — parses rich NDJSON output; extracts session_id, token counts, turn counts, result text, structured output. Replaces MessageParser.
- **TaskResetService** — discards a failed task's worktree and resets the task row to Manual; preserves run history.
- **WorktreeManager** — creates worktrees at `claudedo/{taskId[:8]}` branches, commits changes with semantic messages, updates DB with head commit and diff stats
- **CommitMessageBuilder** — formats `{commitType}(slug): title\n\ndescription\n\nClaudeDo-Task: taskId`
- **AgentFileService** — manages `~/.todo-app/agents/*.md` agent definition files; exposes list/refresh via SignalR
- **LogWriter** — async StreamWriter wrapper, auto-creates parent dirs

## Execution History

Each CLI invocation is recorded in the `task_runs` table via `TaskRunRepository`:
- Fields: `session_id`, input/output/cache token counts, turn count, `result` text, structured output JSON
- Enables auto-retry on failure (resume last session) and multi-turn follow-up via `ContinueAsync`

## Multi-Turn / Continue

`TaskRunner.ContinueAsync` sends a follow-up prompt to an existing Claude session using `--resume <session_id>` with the stored session ID from the last run.

## SignalR Hub

**WorkerHub** methods: `Ping`, `GetActive`, `RunNow`, `CancelTask`, `WakeQueue`, `ContinueTask`, `ResetTask`, `GetAgents`, `RefreshAgents`, `GetAppSettings`, `UpdateAppSettings`, `CleanupFinishedWorktrees`, `ResetAllWorktrees`, `MergeTask`, `GetMergeTargets`, `UpdateList`, `UpdateListConfig`, `GetListConfig`, `UpdateTaskAgentSettings`

**HubBroadcaster** events: `TaskStarted`, `TaskFinished`, `TaskMessage`, `WorktreeUpdated`, `TaskUpdated`, `RunCreated`, `ListUpdated`

## Config

Loaded from `~/.todo-app/worker.config.json`:
- `db_path`, `sandbox_root`, `log_root`
- `worktree_root_strategy` ("sibling" | "central"), `central_worktree_root`
- `queue_backstop_interval_ms` (default 30000)
- `signalr_port` (default 47821)
- `claude_bin` (path to claude CLI)

Per-list config (`list_config` in DB) provides defaults for `model`, `system_prompt`, `agent_path`; tasks can override each individually.

## Notes

- The worker runs standalone — start it separately from the UI
- Only listens on loopback (127.0.0.1)
- ClaudeProcess uses `--dangerously-skip-permissions` — tasks run with full filesystem access
- Worktree branches follow `claudedo/{id}` naming convention
