spec-spine is an open-source CLI tool that compiles markdown specification corpora into deterministic authority ledgers and enforces that code does not drift from its owning spec. It is designed for developers who need strict code-spec alignment and governance, and ships as a prebuilt binary with no Rust toolchain required.
In the CLI tools & terminal space, spec-spine takes a focused approach. It focuses on ensuring codebases remain aligned with their owning specifications by compiling specs and enforcing deterministic authority. It is built as an open-source project for developers. spec-spine is open source under the Apache-2.0 license. The product ships for the command line.
It is developed by stagecraft-ing, and the product first shipped in 2026. Development happens publicly on GitHub with 72 commits in the last 90 days. Key capabilities include markdown spec compilation, deterministic authority ledger, and code-spec enforcement.
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