Feature Pipeline

Execute implementation tasks from a design document using markdown checkboxes.

Input Detection

$ARGUMENTS should be a path to a design markdown file (e.g., docs/designs/xxx.md)

If empty or unclear, ask user for the design file path.

Phase 1: Initialize

1. Read the design file
2. Run python3 .claude/skills/task-execution-engine/scripts/task_manager.py status --file <design.md> to show current progress
3. If all tasks completed, report and exit
4. Otherwise, proceed to execution

Phase 2: Execution Loop

UNATTENDED MODE - No questions, no stopping

LOOP:
  1. RUN: task_manager.py next --file <design.md> --json
  2. IF no task available → EXIT to Phase 3
  3. READ task details (files, criteria)
  4. IMPLEMENT the task
     - Create/modify files as specified
     - Follow codebase patterns
     - Run tests if applicable
  5. VERIFY acceptance criteria
  6. UPDATE status:
     - Success: task_manager.py done --file <design.md> --task "Title"
     - Failure: task_manager.py fail --file <design.md> --task "Title" --reason "..."
  7. OUTPUT result summary
  8. CONTINUE (go to step 1)

Phase 3: Completion

1. Run task_manager.py status --file <design.md> to show final summary
2. Report:
   • Tasks completed
   • Tasks failed (with reasons)
   • Files modified
3. Ask if user wants to commit changes to git

Implementation Guidelines

For Each Task:

1. Read files specified in task's files: line
2. Understand criteria from the checkbox items
3. Implement following existing codebase patterns
4. Verify each acceptance criterion is met
5. Update the design file with completion status

Decision Making:

• If unclear about implementation details → use codebase patterns
• If blocked by missing dependency → mark as failed, continue
• If needs external resource → mark as failed with reason, continue

Status Updates:

# Mark task completed (updates checkbox to [x] ✅)
python3 .claude/skills/task-execution-engine/scripts/task_manager.py done \
  --file <design.md> --task "Task Title"

# Mark task failed (updates checkbox to [x] ❌ with reason)
python3 .claude/skills/task-execution-engine/scripts/task_manager.py fail \
  --file <design.md> --task "Task Title" --reason "Error description"

Output Format

After each task:

---TASK RESULT---
task: Task Title
status: completed|failed
files: [list of modified files]
notes: Brief description
---END TASK RESULT---

Error Handling

Error	Action
Task implementation fails	Mark failed, continue to next
Script error	Log error, retry once, then fail task
No tasks available	Exit loop, show summary
File not found	Ask user for correct path

Key Rules

1. NEVER stop in the middle of execution loop
2. NEVER ask questions during execution
3. ALWAYS update task status in design file
4. Exit only when no pending tasks remain