decompose-task

name	decompose-task
description	Break large tasks (>100 lines) into atomic, verifiable sub-tasks. Use when a task scope is unclear, touches multiple files/modules, or exceeds comfortable single-commit size. Returns structured breakdown without implementing code.

Task Decomposition

Analyze a task and decompose it into atomic, verifiable sub-tasks when scope exceeds ~100 lines.

When to Use

• Estimated >100 lines of code change
• Multiple unrelated files changing
• Multiple state transitions or new states
• Backend + frontend changes beyond contract sync
• Vague descriptions ("implement pipeline", "add full support")

Process

1. Analyze scope: Read relevant files, estimate lines per area
2. Identify boundaries: Find natural cut points (interfaces, modules, layers)
3. Propose sub-tasks: Create checkbox list with line estimates
4. Return proposal for human confirmation

Sub-Task Criteria

Each sub-task should be:

• Completable in one atomic commit
• ~10-50 lines (occasionally up to 100)
• Independently testable or verifiable
• Clearly scoped with success criteria

Output Format

[DECOMPOSITION COMPLETE]

Original task: [description]
Estimated total scope: ~[N] lines across [M] files

Proposed sub-tasks:
- [ ] [sub-task 1] (~N lines) - [brief rationale]
- [ ] [sub-task 2] (~N lines) - [brief rationale]
- [ ] ...

Recommended order: [1 → 2 → 3] or [1, 2 can parallel → 3]
Dependencies: [any blockers or prerequisites]
Questions for human: [if any]

Guidelines

• Do NOT implement code—only analyze and decompose
• Do NOT update plan files directly—return proposal for human confirmation
• If task is already small (<100 lines), report that no decomposition is needed
• Prefer vertical slices (end-to-end thin features) over horizontal layers