Add quality gate framework with schema validation (JSON Schema via
jsonschema library), pattern validation (regex-based), multi-gate
QualityValidator with SQLite persistence, HaltingPolicyEngine with
budget/iteration/improvement checks, and RefinementLoop for iterative
execute-validate-halt cycles.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Add directed dependency graph with cycle detection, topological sort,
and query service for finding dependents/dependencies transitively.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>