gean

Review a branch or PR's diff against main and report opportunities to subtract — simplify, delete, and reduce the number of concepts a reader has to hold in their head. Use when users want to (1) review a branch before merge for bloat, (2) find dead code or premature abstractions, (3) identify duplication of existing utilities, (4) audit AI-generated code for over-engineering, or (5) reduce LOC without changing behavior. Report-only by default; only applies fixes when the user explicitly says so.

Check gean's compliance with leanSpec changes since a devnet version. Use when checking if gean implements all spec changes, is spec-compliant, or needs to catch up to the spec.

Manage local development networks (devnets) for lean consensus multi-client testing. This skill should be used when the user asks to run a devnet, start or stop devnet nodes, spin up a local testnet, configure validator nodes, regenerate genesis files, change Docker image tags, collect or dump node logs, troubleshoot devnet issues, restart a node with checkpoint sync, run a long-lived devnet with detached containers, or perform rolling restarts to upgrade images.

Test gean PR changes in multi-client devnet. Use when users want to (1) Test a branch/PR with other Lean clients, (2) Validate BlocksByRoot or P2P protocol changes, (3) Test sync recovery with pause/unpause, (4) Verify cross-client interoperability, (5) Run integration tests before merging.

Review and analyze devnet run results. Use when users want to (1) Analyze devnet logs for errors and warnings, (2) Generate a summary of a devnet run, (3) Identify interoperability issues between clients, (4) Understand consensus progress and block production, (5) Debug forks and finalization issues.