v1.7.0

[1.7.0] - 2026-08-13

Added

• Drift Guardian core: deterministic policy gate for git diffs (src/guardian/). Includes the domain model (GuardianFinding, GuardianRule, GuardianPolicy, GuardianContext, GuardianResult, AIReviewProvider) and the git change collector (stdin / staged / base ref / diff file / working tree), reusing the existing unified-diff parser and git readers without new runtime dependencies.
• Product and technical documentation for Guardian: docs/guardian/ (PRD, TRD, APP_FLOW, UI_UX_DESIGN_BRIEF, BACKEND_SCHEMA, IMPLEMENTATION_PLAN).
• OpenSpec delta spec for the guardian domain under openspec/specs/guardian/.

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