Checking Version Information

Knowing which version of Crab you're running matters for compatibility checks, bug reports, and ensuring you have the latest features. crab version gives you the version string, git commit SHA, and build timestamp in one command.

Usage

crab version

crab 0.15.0 (abc1234)
built at 2024-01-15T10:30:00Z

When Version Matters

Including in Bug Reports

Pair version info with environment details for a complete picture:

crab version
crab env
crab doctor

Schema Registry

The JSON output includes the schema registry — a list of all supported structured output schemas and their versions. This is useful for automation that needs to know which output formats are available:

crab version --json

{
  "schema": "version",
  "version": "1.0",
  "data": {
    "crab_version": "0.15.0",
    "git_sha": "abc1234",
    "build_timestamp": "2026-04-24T12:00:00Z",
    "schemas": {
      "add": "1.0",
      "du": "1.1",
      "hydrate": "1.0",
      "status": "1.0"
    }
  }
}

CLI Reference

For complete command syntax and all available flags, see the crab version reference.