feat: add plugin-based policy engine with shadow mode#29
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digitarald merged 1 commit intomainfrom Feb 22, 2026
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Introduce a new plugin-based policy engine that runs alongside the existing readiness system in shadow mode for safe validation. New modules in src/services/policy/: - types.ts: Signal, Recommendation, Grade, PolicyContext interfaces - compiler.ts: compiles policy configs into executable plugin chains - loader.ts: loads and validates plugin chains from policy sources - engine.ts: executes plugins, computes scores and grades - adapter.ts: bridges engine reports to legacy ReadinessReport format - shadow.ts: shadow mode logging for comparison with legacy path Changes to existing code: - readiness.ts: adds optional 'shadow' mode and 'engine' field on ReadinessReport; refactors isConfigSourced tracking for clarity - utils/fs.ts: clarifies validateCachePath caller responsibilities - README.md: documents new policy/ directory and links plugin guide Includes comprehensive test coverage (7 new test files, all 440 tests pass) and plugin authoring documentation in docs/plugins.md. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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Summary
Introduces a new plugin-based policy engine that runs alongside the existing readiness system in shadow mode for safe validation before becoming the default.
New modules (
src/services/policy/)types.tscompiler.tsloader.tsengine.tsadapter.tsshadow.tsChanges to existing code
readiness.ts— adds optionalshadowmode andenginefield onReadinessReport; refactorsisConfigSourcedtracking for clarityutils/fs.ts— clarifiesvalidateCachePathcaller responsibilities in commentREADME.md— documents newpolicy/directory and links plugin authoring guideKey design decisions
enginefield onReadinessReportis optional, so existing CLI and VS Code extension consumers are unaffectedTesting
docs/plugins.md