codecov.yml

# Codecov configuration.
# https://docs.codecov.com/docs/codecov-yaml

coverage:
    precision: 2
    round: down
    range: "70...100"

    status:
        # Project-level coverage check (overall coverage of main).
        project:
            default:
                target: auto
                # Allow a 1% drop in coverage before failing the check.
                threshold: 1%
                # Only run on pushes to main, not PRs (PRs use the patch check).
                if_ci_failed: error
                informational: false

        # Patch-level coverage check (coverage of changed lines in the PR).
        patch:
            default:
                target: 80%
                # Allow some leeway — not every changed line is testable.
                threshold: 5%
                if_ci_failed: error
                informational: false

# Pull request comment configuration.
comment:
    layout: "reach,diff,flags,tree"
    behavior: default
    require_changes: false
    require_base: false
    require_head: true

# Files to ignore in coverage reporting.
# These are paths relative to the repository root.
ignore:
    # Build artefacts
    - "target/"
    # Test files (their own coverage is not the goal — the code they exercise is)
    - "tests/"
    # Build scripts
    - "build.rs"
    # Configuration examples
    - "config/"
    # Generated documentation
    - "docs/"
    # CLI entry point — uses tokio::main and std::process::exit which
    # cannot be unit-tested without forking the process. Functionality is
    # covered end-to-end by the Python integration tests in tests/integration/.
    - "src/main.rs"
    # Stdio transport — async I/O wrapping tokio::io::stdin()/stdout(). Cannot
    # be unit-tested without invasive refactoring to inject readers/writers.
    # Behaviour is exercised end-to-end by the Python integration tests.
    - "src/mcp/transport.rs"