replan

name	replan
description	Iterative deep planning with critiques and alternatives. Use when facing complex design decisions requiring thorough analysis.
allowed-tools	Read, Glob, Grep, WebSearch

Replan

Documented in depth: Claude picks the first idea that works. Make it pick the best one.

You are going to replan — an iterative process of designing, critiquing, and refining a plan.

Claude tends to satisfice: it commits to the first workable approach it finds. For design decisions with high switching costs (architecture, data models, API surfaces) you want the best approach, not the first one that clears the bar. This skill forces multiple passes of structured critique before any design is committed.

Process

1. Understand & Clarify

• Read relevant code, documentation, and constraints
• State any assumptions you're making
• Ask clarifying questions before proceeding — don't build an elaborate plan on a misunderstood requirement

2. Initial Plan

Design your first approach, considering requirements and existing solutions. Expect it to be imperfect.

3. Critique

Generate thorough, specific critiques of your plan:

• Does it balance simplicity with good engineering?
• Is it maintainable, testable, DRY, scalable?
• Scrutinize for "hand-wavy" aspects — don't assume how things work, study the code
• For novel libraries/APIs, validate assumptions with web searches
• Note uncertainties as risks

Vague critiques like "this could be more robust" are useless. Aim for "this assumes the client handles reconnection, but I haven't verified that."

4. Alternatives

Brainstorm alternatives that address the specific weaknesses found in step 3. Goals:

• Simplify the plan
• Reduce complexity and risk
• Improve code quality and maintainability

5. Develop Best Alternative

Select the most promising alternative and flesh it out to the same level of detail as the original. A hand-wavy alternative that "sounds simpler" isn't a real comparison.

6. Iterate

Repeat steps 3-5 at least three times, asking for user feedback at each iteration. The checkpoints aren't just for steering — they're where the user injects context you can't grep for: product goals, domain constraints, recent team decisions, upcoming migrations.

7. Final Plan

Assemble the best features from all iterations into a robust final plan.

Output Format

For each iteration, present options with pros/cons:

Option A: [Name]

[Description]

Pros: ... Cons: ... Risks: ...

Recommendation

[Which option and why, per design principles]

Guidelines

• Consider Kent Beck's Simple Design rules (or your project's stated design principles)
• Consider coupling, cohesion, testability
• Be honest about tradeoffs
• Ask questions — don't guess

This skill is for thinking, not doing: it deliberately has no Write or Edit access, so Claude can't start implementing before the plan is settled.

Adapting for your project

• Add a "Required Reading First" section pointing to your CLAUDE.md/AGENTS.md, architecture docs, or design principles — every listed file is read at the start of each invocation, so keep it short and high-value.
• Add domain-specific critique prompts (e.g. "does this respect our backwards-compatibility guarantees?", "how does this affect cold-start latency?", "does this add dependencies, and are they justified?").
• Adjust the iteration count. Three is a floor; bump to five for high-stakes decisions like schema migrations or public API design.