next

Argument: $ARGUMENTS

Always start with Section 1 (Find Tasks).

---

1. Find Tasks

ls .otto/tasks/*.json 2>/dev/null

Read each file, check for pending sessions/tasks. For each task file, also read the corresponding spec file frontmatter to get the spec name.

If no task files: "No tasks found. Run /task <spec-name> to generate."

If multiple specs have pending work, use AskUserQuestion:

Multiple specs have pending work:
1. {spec-name} ({spec-id}): {n} sessions pending
2. {spec-name} ({spec-id}): {n} sessions pending

Which spec should I work on?

Branch Check (Sections 2, 3, 4)

Before proceeding to any implementation section, check the current branch:

current_branch=$(git branch --show-current)

If on main or master, use AskUserQuestion:

You're on '{current_branch}'. Create a feature branch or continue here?

1. Create branch: otto/{spec-id} (recommended)
2. Stay on {current_branch}

If user picks 1, create the branch and continue. If 2, proceed as-is.

---

2. Select Task

Select the next task:

1. Filter to tasks with status "pending"
2. Filter to unblocked tasks (all depends_on tasks are "done")
3. Sort by priority (lower number = higher priority)
4. Tie-break by ID (lower ID first)

If no unblocked tasks:

Report the selected task:

Next task: {id}
Title: {title}
Priority: {priority}
Session: {session_id}

If invoked with status suffix, stop here — do NOT implement.

Implement Task

1. Update task status to "in_progress"
2. Report: "Starting task {id}: {title}"

Launch subagent using Task tool:

• subagent_type: frontend-developer (frontend tasks) or backend-architect (backend tasks)
• Include in prompt: task context + planning workflow (see below)
• Wait for subagent to complete

Subagent prompt must include:

## Task Context
- **Task:** {task title}
- **Description:** {task description}
- **Files:** {file list}
- **Done when:** {done condition}
- **Spec path:** {spec_path from task file}

## Required Workflow

**Always plan before implementing.** Simple tasks get simple plans.

### Phase 1: Plan
1. Read the spec's Technical Design section at {spec_path}
2. Explore relevant files to understand existing patterns
3. Write your implementation plan to `.otto/plans/task-{task_id}.md`:
   - Describe your approach
   - List files to modify and key changes
   - Note any spec decisions that affect implementation

### Phase 2: Implement
4. Implement according to your plan
5. Verify the done condition is met

Keep the plan concise - it's for your reference and audit trail.

After subagent completes:

• Update task status to "done"
• Check if all tasks in session are "done"; if so, mark session "done"
• Stage: git add -u && git add .otto/
• Commit: git commit -m "otto: {spec-id} task {id} — {title}"

Report: "Task {id} complete."

---

3. Select Session

Select the next session:

1. Filter to sessions with status "pending"
2. Filter to unblocked sessions (all depends_on sessions are "done")
3. Sort by priority (lower number = higher priority)
4. Tie-break by ID (S1 before S2)

If no unblocked sessions:

Report the selected session:

Next session: {id}
Title: {title}
Priority: {priority}
Tasks: {task_count}

If invoked with status suffix, stop here — do NOT implement.

Implement Session

1. Update session status to "in_progress"
2. Report: "Starting session {id}: {title} ({n} tasks)"

Launch subagent using Task tool:

• subagent_type: frontend-developer (frontend tasks) or backend-architect (backend tasks)
• Include in prompt: session context + planning workflow (see below)
• Subagent implements tasks sequentially, marking each "done" as completed
• Wait for subagent to complete

Subagent prompt must include:

## Session Context
- **Session:** {session title}
- **Tasks:** {task titles with descriptions}
- **Files:** {file lists from all tasks}
- **Done when:** {done conditions for each task}
- **Spec path:** {spec_path from task file}

## Required Workflow

**Always plan before implementing.** Simple tasks get simple plans.

### Phase 1: Plan
1. Read the spec's Technical Design section at {spec_path}
2. Explore relevant files to understand existing patterns
3. Write your implementation plan to `.otto/plans/{session_id}.md`:
   - List each task you will implement
   - For each task, describe: approach, files to modify, key changes
   - Note any spec decisions that affect implementation

### Phase 2: Implement
4. Implement each task according to your plan
5. After each task: verify the done condition is met
6. Mark each task "done" as completed

Keep the plan concise - it's for your reference and audit trail.

After subagent completes:

• Update session status to "done"
• Stage: git add -u && git add .otto/
• Commit: git commit -m "otto: {spec-id} session {id} — {title}"

Report: "Session {id} complete. {n} tasks done."

---

4. Batch Mode

Select sessions to implement:

1. Filter to sessions with status "pending"
2. Filter to unblocked sessions (all depends_on sessions are "done")
3. Select only sessions at the highest priority level (lowest number)

If no unblocked sessions: Show same messages as Section 3.

If only 1 session: Continue to Section 3's "Implement Session" subsection with that session.

If multiple sessions: Launch parallel subagents.

Mark all sessions as "in_progress" before launching.

Launch ALL sessions in a single message with multiple Task tool calls (one per session), using run_in_background: true:

• subagent_type: frontend-developer (frontend tasks) or backend-architect (backend tasks)
• Include in prompt: session context + planning workflow (see below)
• Subagent implements tasks sequentially, marking each "done" as completed

Example (3 sessions → 3 Task calls in one response):

Task(description="Implement S1", prompt="...", subagent_type="frontend-developer", run_in_background=true)
Task(description="Implement S2", prompt="...", subagent_type="backend-architect", run_in_background=true)
Task(description="Implement S3", prompt="...", subagent_type="frontend-developer", run_in_background=true)

Subagent prompt must include:

## Session Context
- **Session:** {session title}
- **Tasks:** {task titles with descriptions}
- **Files:** {file lists from all tasks}
- **Done when:** {done conditions for each task}
- **Spec path:** {spec_path from task file}

## Required Workflow

**Always plan before implementing.** Simple tasks get simple plans.

### Phase 1: Plan
1. Read the spec's Technical Design section at {spec_path}
2. Explore relevant files to understand existing patterns
3. Write your implementation plan to `.otto/plans/{session_id}.md`:
   - List each task you will implement
   - For each task, describe: approach, files to modify, key changes
   - Note any spec decisions that affect implementation

### Phase 2: Implement
4. Implement each task according to your plan
5. After each task: verify the done condition is met
6. Mark each task "done" as completed

Keep the plan concise - it's for your reference and audit trail.

Report:

Launching {n} priority-{p} sessions in parallel:
- Session {id1}: {title1} ({n} tasks)
- Session {id2}: {title2} ({n} tasks)

Monitor and complete:

• Wait for all subagents to finish
• Mark sessions as "done"
• Stage: git add -u && git add .otto/
• Commit: git commit -m "otto: {spec-id} batch — {n} sessions at priority {p}"
• Report: "Completed {n}/{total} sessions"
• Suggest: "Run /next batch again for next priority level."