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Use when you have a spec or requirements for a multi-step task, before touching code
Comprehensive implementation plans for multi-step tasks, breaking down specs into bite-sized, testable steps. Decomposes requirements into focused tasks (2–5 minutes each) following TDD: write failing test, verify failure, implement, verify pass, commit Maps file structure upfront with clear boundaries and responsibilities, ensuring each file has one purpose and files that change together stay together Includes exact file paths, complete code samples, and specific commands with expected outputs for each step Requires plan review via subagent before execution; supports two execution modes (subagent-driven per task or inline batch execution) Writing Plans Overview Write comprehensive implementation plans assuming the engineer has zero context for our codebase and questionable taste. Document everything they need to know: which files to touch for each task, code, testing, docs they might need to check, how to test it. Give them the whole plan as bite-sized tasks. DRY. YAGNI. TDD. Frequent commits. Assume they are a skilled developer, but know almost nothing about our toolset or problem domain. Assume they don't know good test design very well. Announce at start: "I'm using the writing-plans skill to create the implementation plan." Context: If working in an isolated worktree, it should have been created via the superpowers:using-git-worktrees skill at execution time. Save plans to: docs/superpowers/plans/YYYY-MM-DD-<feature-name>.md (User preferences for plan location override this default) Scope Check If the spec covers multiple independent subsystems, it should have been broken into sub-project specs during brainstorming. If it wasn't, suggest breaking this into separate plans — one per subsystem. Each plan should produce working, testable software on its own.
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