pushkin 0.1.0

Schema-first enforcement harness that gates AI coding agents' file writes against project contracts

pushkin-0.1.0 is not a library.

pushkin CLI: init / check / compile / doctor / hook / instructions (spec §12, Phase 2 subset). Thin shell over pushkin-core and pushkin-compiler; every gate decision is appended to the SQLite event log (charter N7).