claude-replan
A Claude Code plugin for plan validation and post-implementation review. /replan validates plans before execution, /recheck verifies the implementation matches the plan afterward. Both use parallel review subagents checking from multiple angles.
The problem
You write a plan. It looks solid. You start executing. Three tasks in, you realize the plan assumed a function that doesn't exist, missed a critical edge case, or ignored your project's conventions entirely. Now you're rewriting the plan mid-flight.
The solution
/replan throws your plan at a squad of parallel review agents before you write a single line of code. Each agent has a different job — one checks if the code references are real, another stress-tests feasibility, another reads the plan cold and asks "what did everyone miss?"
The result: a plan that's been pressure-tested from every angle, with all findings incorporated automatically.
How it works
You: /replan
Claude: Reviewing the plan with parallel subagents...
Agent 1 (Codebase alignment) → Checks referenced files/APIs actually exist
Agent 2 (Best practices) → SOLID, DRY, security, error handling
Agent 3 (Feasibility & risks) → Missing steps, ordering issues, blockers
Agent 4 (Fresh perspective) → Reads the plan cold, finds blind spots
Agent 5 (Project standards) → CLAUDE.md conventions, naming, test patterns
✓ All agents returned.
Critical: Plan references `getUserById()` which was renamed to `findUser()` in v3.2
Critical: Task 4 depends on Task 6 output — wrong ordering
Important: No error handling for API timeout in Task 2
Important: Missing rollback strategy for database migration
→ Plan updated with all findings.
Key features
Adaptive agent selection — agents are chosen based on what the plan actually covers, not a fixed checklist. A database migration plan gets different reviewers than a UI redesign plan.
Always includes a "fresh perspective" agent — an agent that reads the plan with zero context and asks "what would go wrong that nobody anticipated?" This consistently catches things the other agents miss.
Scales with complexity — simple 3-task plans get 3-4 agents. Complex 15-task plans get 6-8. Each with a distinct, non-overlapping focus area.
Works with any plan type:
| Plan type | Review focus |
|---|
| Implementation | Codebase alignment, architecture, test coverage |
| Research | Fact-checking, methodology, source verification |
| Design/UI | Visual consistency, accessibility, component library usage |
| Migration | Rollback safety, data integrity, backwards compatibility |
| Refactor | Hidden consumers, test coverage, actual simplification |
| Infrastructure | Failure modes, monitoring gaps, configuration management |
Updates the plan automatically — findings are categorized by severity (critical → important → minor) and incorporated directly. You read the plan only after it's been validated.
Review perspectives
| Perspective | What it checks |
|---|
| Codebase alignment | Do referenced files/functions/APIs actually exist? Current patterns? Reusable utilities? |
| Best practices | SOLID, DRY, YAGNI, error handling, security (OWASP top 10), performance |
| Project standards | Naming conventions, file structure, test patterns, commit style, tech stack |
| Feasibility & risks | Missing steps, dependency ordering, underestimated complexity, blockers |
| Fresh perspective | Edge cases, blind spots, simpler alternatives, operational concerns |
| Research & facts | API/library accuracy, version compatibility, protocol correctness |
| Design & UX | Visual consistency, accessibility, responsive behavior, loading/error states |
| Data & schema | Migration safety, indexing, data integrity, query performance |
| Security | Auth flows, input validation, secrets handling, attack surface |
| Operations | Rollback strategy, monitoring, configuration management, failure modes |
Only relevant perspectives are selected — a CLI tool plan won't get a UX review agent.
Installation
claude plugin marketplace add https://github.com/kojott/claude-replan
claude plugin install replan@claude-replan
Updating
claude plugin marketplace update claude-replan
claude plugin update replan@claude-replan
/recheck — post-implementation review
You've finished implementing a plan. /recheck verifies the code actually matches what was planned, plus runs parallel quality/security/test reviews.
You: /recheck
Claude: Reviewing the implementation against the plan with parallel subagents...
