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CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

Build and Development Commands

Basic Commands

  • Build: cargo build or cargo build --release
  • Format: cargo fmt --all -- --check
  • Lint: cargo clippy --all-targets --all-features --workspace --exclude zksync_os_integration_tests -- -D warnings
  • Unit tests: cargo nextest run --workspace --exclude zksync_os_integration_tests
  • Integration tests: cargo nextest run -p zksync_os_integration_tests --profile no-pig (no live anvil needed — each test manages its own L1/node; --profile no-pig disables Prover Input Generation for faster runs)

Local Development Setup

  1. Run script: ./run_local.sh ./local-chains/v30.2/default
  2. To restart chain: rm -rf db/* then re-run the script

Submitting a PR

PR title

PR titles must follow the Conventional Commits specification:

<type>(<scope>): <short description>

Examples: feat(eth_sender): Support new transaction type, fix(state_keeper): Correctly handle edge case, ci: Add new workflow for linting

Breaking changes

If the PR title uses the breaking-change marker (feat!: ..., fix!: ...), you must uncomment and fill in the Breaking Changes and Rollout Instructions sections in the PR description (see .github/pull_request_template.md).

Wire format immutability

Do not modify existing versioned wire format files under lib/network/src/wire/replays/v*.rs. Add a new versioned file instead.