name: writing-plans description: Use when design is complete and you need detailed implementation tasks for engineers with zero codebase context - creates comprehensive implementation plans with exact file paths, complete code examples, and verification steps assuming engineer has minimal domain knowledge

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, docs they might need to check. Give them the whole plan as bite-sized tasks. DRY. YAGNI. Frequent commits.

Assume they are a skilled developer, but know almost nothing about our toolset or problem domain.

Announce at start: "I'm using the writing-plans skill to create the implementation plan."

Save plans to: the same folder as the design document (e.g. docs/plans/YYYY-MM-DD-<feature-name>/plan.md)

Bite-Sized Task Granularity

Each step is one action (2-5 minutes):

• "Implement function/component" - step
• "Verify it works (run type check and linting and testing in case of tests)" - step

Plan Document Header

Every plan MUST start with this header:

# [Feature Name] Implementation Plan

> **For Claude:** REQUIRED SUB-SKILL: use executing-plans skill to implement this plan task-by-task.

**Goal:** [One sentence describing what this builds]

**Architecture:** [2-3 sentences about approach]

**Tech Stack:** [Key technologies/libraries]

---

Task Structure

### Task N: [Component/Feature Name]

**Files:**

- Create: `exact/path/to/file.ts`
- Modify: `exact/path/to/existing.ts:123-145`

**Step 1: Implement functionality**

```typescript
export function processUserData(input: UserInput): ProcessedData {
  return {
    id: input.id,
    name: input.name.trim(),
    status: "active",
  };
}
```

**Step 2: Verify functionality**

Run type checking and linting:

```bash
bun check-types
bun check
```

Expected: No type errors or linting issues

Remember

• Exact file paths always
• Complete code in plan (not "add validation")
• Exact commands/verification steps with expected output
• Reference relevant skills with @ syntax
• DRY, YAGNI, frequent commits

Execution Handoff

After saving the plan, offer execution choice:

"Plan complete and saved to docs/plans/<filename>.md. Ready for execution:

Ask user if they want to execute the plan now or later. If they want to execute it now, use executing-plans skill to execute the plan. If they want to execute it later, ask them to execute it later.