Spec27 – Spec-driven validation for AI agents
External black-box testing for agents when you can't install SDKs.
Simple Attributes for syncing Gherkin specifications with implementations.
Compile-time Gherkin validation catches spec drift before tests even run.
C# and Rust developers using BDD/Cucumber testing
SpecFlow · Cucumber · Behave
If there is a line mismatch in a test, the build will fail before the tests do. This is useful if you like the idea of unit tests but don't appreciate the amount of boilerplate and iteration time libraries such as XUnit require.
Try it in your agentic workflow and drop a comment with any feedback. Hopefully it will help you all reduce documentation drift and LLM hallucinations.
External black-box testing for agents when you can't install SDKs.
Fix task 14 of 30 without restarting—Cursor's all-or-nothing approach can't do this.
Schema-validated Markdown specs that agents can query without loading everything.
Specs before code—AI PM → DevCrew → QA, runs inside Claude Code today.
Context clearing between steps cuts costs, but hallucinated 2026 citations hurt trust.
YAML runbook executor with destructive-step approval gates, exposable as MCP tools directly.