v0.16.0 — Policy Preview & Simulation

GitWire v0.16.0 helps operators understand policy changes before automation acts.

This release adds a non-mutating policy preview workflow for validating .gitwire.yml, simulating proposed policy against historical decisions, comparing current vs proposed behavior, and generating deterministic guardrail recommendations.

Highlights

• Policy validation API
• Policy preview dashboard
• Historical event simulation
• Policy diff impact view
• Guardrail recommendations
• Non-mutating safety model: no config saves, no queue jobs, no GitHub writes

Why it matters

GitWire's operating model is Decide. Execute. Prove.

v0.16.0 adds a new preflight layer before execution:

Validate policy. Preview behavior. Simulate impact. Review guardrails. Then roll out safely.

Operators can now answer:

• Is this .gitwire.yml valid?
• Which pillars does it enable?
• Is dry-run protecting this rollout?
• Which settings are risky?
• How would this policy behave against recent repository history?
• What changes compared to the current repo policy?
• Would this policy act on more events?
• What guardrails should be added before rollout?

Included PRs

• #32 — Policy validation API
• #33 — Policy preview dashboard
• #34 — Historical event simulation
• #35 — Policy diff impact view
• #36 — Guardrail recommendations
• #37 — Documentation + release

New API endpoints

Endpoint	Purpose
POST /api/config/validate	Validate policy YAML, return errors/warnings/risks
POST /api/config/simulate	Replay proposed policy against historical events
POST /api/config/diff-impact	Compare current vs proposed policy behavior
POST /api/config/recommendations	Generate deterministic guardrail recommendations

Test status

• 36 suites
• 766 tests
• CI green: syntax-check, rules-tests, web-tests
• CodeQL green
• Protected-branch flow with admin enforcement
• Deploy workflow passing on self-hosted runner

Release line

v0.14.0-public-baseline → v0.14.1 → v0.15.0 → v0.16.0