Analyze a project's structure: directory tree, detected stack(s), package manager, available scripts, presence of tests/linter/typechecker, and notable config files. Read-only.

Read the files most relevant to a task without loading the whole project. Either pass candidateFiles, or let the tool rank files by lexical relevance. Content is truncated, secret-masked, and sensitive files are skipped by default. Read-only.

Assemble a structured change plan from deterministic project context (likely files, checks to run, detected risks) before writing code. Returns a plan scaffold plus guidance for finalizing it. Makes a reasonable assumption rather than asking unless something is truly blocking. Read-only.

Turn concrete edits into a guaranteed-valid unified diff that apply_patch can consume. If edits is omitted, returns a generation brief (relevant file contents + the exact edit format to use) so you can produce the edits. Does not write to disk. Read-only.

Apply a unified diff to the project. Defaults to dryRun=true. All target paths are confined to the project root, suspicious mass deletions are refused, and touched files are backed up before writing. Validates that every hunk applies cleanly first.

Auto-detect and run the project's test / lint / typecheck / build commands. Only allowlisted base commands are spawned; each runs in the project dir with a timeout, bounded and secret-masked output.

Parse test / lint / typecheck / build output into structured issues (file, line, code, message, priority), identify affected files, and return guidance for producing a corrective patch. Read-only.

Run a controlled verify→analyze→fix loop. Each iteration runs the project checks; on failure it analyzes errors and, when the client supports MCP sampling, requests corrective edits and applies them (if allowApply=true), then re-checks — up to maxIterations. Every action taken is reported. When sampling is unavailable it returns a precise advisory so the calling assistant can drive the loop.

Report the Git state: current branch, staged/modified/untracked files, last commit, and whether the working tree is clean. Read-only.

Produce a clean summary of changes: a user-facing summary, a technical summary, a suggested conventional-commit message, the checks performed, and known limitations. Uses the current git diff when none is supplied. Read-only.