Return diagnostic metadata for this Change Trace MCP process. Use this to verify host startup and runtime compatibility.

Return a fixed, versioned JSON fixture. The same package version must return byte-identical text in every MCP Host.

Resolve two Git refs and return a deterministic, bounded summary of commits, changed files, diff excerpts, detected languages, truncation, and read errors. The repository path must be an explicit Git root.

Collect bounded, provenance-rich excerpts from regular files beneath configured document roots in the exact Git repository named by a ChangeScope. Symbolic links are not followed and common credential patterns are redacted.

Combine a ChangeScope, local document evidence, and optional normalized evidence into a bounded ReviewBundle with a stable evidence index, deterministic Git facts, and explicit missing-evidence records.

Validate Agent-produced findings against the shared schema and a ReviewBundle. Known enum formatting aliases are normalized; unknown evidence IDs, unsupported sources, duplicate IDs, and unsupported substantive findings are rejected without inventing content.

Render validated Agent findings as a deterministic Markdown and JSON report pair inside a repository-relative output directory. The report preserves confirmed, suspected, and inconclusive findings, evidence coverage, bundle limits/truncation, and validation warnings.