Scan a repository and return a structured analysis report.

Retrieve a line-range slice from a file.

Apply a unified diff to a file; run optional tests and auto-rollback on failure.

Create an atomic git commit; enforces session budget and confirmation checkpoints.

Read a value from reforge-state.json.

Returns {key, value, found}.

Write a value to reforge-state.json atomically.

Returns {success, key, previous_value}. ttl_seconds is accepted but not enforced (stored as metadata only).

Infer the architectural pattern of a repository.

Runs scan_repo, detects pattern (REST API, CLI tool, library, web frontend), identifies entry points and logical modules, stores the result in reforge-state.json under architecture_hypothesis, and returns the inference.

Score the risk of changing a symbol (0 = safe, 100 = very risky).

Factors: inbound references, test coverage, file size, circular deps. Returns score, per-factor breakdown, and a recommendation string.

Compute a 0-100 health score from scan metrics and append to health_history.

Scoring deductions: duplicate ratio (-30 max), dead code ratio (-30 max), god files (-20 max), circular deps (-20 max).

Write REFORGE_CHANGES.md from current session state.