Writ

Advance the current Writ workflow phase with an explicit tool-confirmed advance. NOT a replacement for pattern-match approval detection; this command spends the token that detection mints (see Authorization below).

Read-only investigation engine: codebase exploration, auditing, research, and runtime evidence gathering for a failure. Cannot modify files. Use before planning, to answer a question that requires grounding findings in evidence (file:line, config value, schema fact), or to reproduce a failure and capture its runtime evidence before anyone reads the source.

Implements all files listed in an approved plan. Writes production code, configuration, and updates test implementations. Use after test skeleton approval.

Designs implementation plans for coding tasks. Writes plan.md and capabilities.md to the project root. Use after exploration, before test writing.

Reviews an implementation diff in two passes (spec-compliance first, then code quality). Read-only. Returns structured findings. Replaces the separate spec/code-quality reviewers.

Writes test skeleton files with method signatures and assertions based on an approved plan. Use after plan approval, before implementation.