# Deterministic evidence gates implementation

Implemented layered deterministic gates.

## Added
- `scripts/task-phase-lib.ts`

## Updated
- `bin/task-phase-init`
- `bin/task-phase-run`
- `bin/task-phase-loop`
- `docs/task-phase-machine.md`

## Gate model
Three layers:
1. universal gates
2. task-class gate profile
3. task-instance required gates

## Built-in gate profiles
- `repo_code`
- `docs_only`
- `audit`
- `migration`
- `ops_setup`
- `research_with_artifact`

## Behavior
- `task-phase-init` now creates:
  - `Gate profile`
  - `Required gates`
  - `Gate status`
- `task-phase-run` now enforces required gate pass states on:
  - `verify -> review`
  - `review -> done`
- loop reuses the shared parsing/state logic

## Determinism
The runner no longer trusts prose-only claims for completion.
Required gates must exist and be explicitly marked `pass`.

## Validation
- `bun run typecheck` passes
- smoke-checked generated STATE.md gate sections