ViewDoctor MCP Server

ViewDoctor

Check SwiftUI diffs with module ownership attached.

ViewDoctor maps modules from Swift Package Manager, Tuist, Xcode projects, and common source layouts before it scans SwiftUI code. Run it after a human or coding agent changes a diff; the result stays local and can be read as terminal text, compact agent JSON, full versioned JSON, or SARIF.

Modules/Profile/Sources/ProfileView.swift:42:18: warning: VD001 [tuist:Modules/Profile/Profile]: DateFormatter is constructed inside a body property.
ViewDoctor: 1 finding(s) in 12 file(s), 4 module(s).

The review loop

A small generated diff should not require sending the repository back to a general model just to look for three known SwiftUI risks. ViewDoctor gives those checks stable rule IDs, exact locations, module ownership, and bounded output:

edit -> scan changed files -> fix findings -> verify once

• It reads source locally and has no telemetry.
• Manifest-derived identifiers keep findings useful in large repositories.
• Agent JSON keeps the location, module, message, and fix without repeating verbose human context; full JSON keeps explanations for integrations.
• Deterministic ordering and exit codes make the same command useful in CI.

ViewDoctor complements the Swift compiler, SwiftLint, Periphery, and Instruments. It does not replace builds, profiling, or architecture review.

Install and run

Requires Swift 6.2 or newer for source builds.

git clone https://github.com/KamnevVladimir/ViewDoctor.git
cd ViewDoctor
swift build -c release
.build/release/viewdoctor scan /path/to/project

Analyze only the current git diff—the recommended mode for coding agents:

viewdoctor scan . --git-diff --format agent
viewdoctor scan . --base origin/main --format agent

--git-diff includes tracked changes and new untracked Swift files. A newly generated view is therefore not skipped just because it has not been added to Git yet.

Run a strict pre-commit checkpoint against the index only:

viewdoctor scan . --staged --fail-on warning

Inspect discovered modules and dependencies:

viewdoctor graph .

Generate GitHub Code Scanning output:

viewdoctor scan . --base origin/main --format sarif > viewdoctor.sarif

Discover commands and the installed version without opening the README:

viewdoctor --help
viewdoctor --version

Changed files, pre-commit, and CI

These are separate checkpoints rather than aliases:

Use --fail-on warning when warnings must block a hook or CI job. The default remains error, so adopting ViewDoctor does not silently turn every warning into a breaking gate.

Multi-module architecture

ViewDoctor builds a normalized graph from all manifests it discovers:

When providers overlap, the longest matching source root wins. The graph model exposes a reverse dependency-cone operation for integrations and future affected-module rules. The current three source rules still scan only the selected files; they do not pretend to validate unchanged dependents.

Manifest calls are parsed as bounded SwiftSyntax expressions, so one target's dependencies cannot bleed into the next target. Tuist .project(target:path:) edges are resolved relative to the manifest or project root, and self-edges are discarded. viewdoctor graph . also emits diagnostics when a Tuist manifest imports ProjectDescriptionHelpers: helper-generated targets are executable Swift and cannot be expanded by a static parser. ViewDoctor reports that limit instead of presenting a partial graph as complete.

Rules

Rules intentionally use conservative language: a finding is a reviewable risk, not a claim that profiling has proven a performance regression.

The current release has three rules. It does not yet enforce dependency direction, detect cycles, or prove runtime performance. Those are explicit roadmap items rather than implied capabilities.

GitHub Action

Run ViewDoctor in CI on a macOS runner with Swift 6.2 or newer. The action builds the pinned Swift package, scans the checked-out repository, and can upload SARIF findings to GitHub Code Scanning.

name: ViewDoctor

on:
  pull_request:

permissions:
  contents: read
  security-events: write

jobs:
  analyze:
    runs-on: macos-26
    steps:
      - uses: actions/checkout@v6
        with:
          fetch-depth: 0
      - uses: KamnevVladimir/ViewDoctor@v0
        with:
          diff-base: origin/main
          fail-on: warning

Set upload-sarif: false when the workflow cannot grant security-events: write, such as a restricted fork workflow. Use a full release tag such as v0.1.7 when you need an immutable dependency; v0 is the maintained major-version pointer.

Output contract

Full JSON reports include schemaVersion, relative source locations, stable rule IDs, module IDs, explanations, remediation, and a module graph summary. --format agent is a smaller JSON contract for the edit/fix loop: it retains the exact finding and fix but replaces the repeated module list with a count. Integrations that need every field should consume full JSON or SARIF.

Optional .viewdoctor.json:

{
  "excludedPaths": ["Generated", "Vendor"],
  "disabledRules": ["VD002"],
  "minimumSeverity": "warning",
  "maxFindings": 100
}

minimumSeverity controls which findings are reported. --fail-on controls only the process exit code, so a CI gate can be stricter without changing the shared report configuration.

Exit codes:

• 0: scan completed below the --fail-on threshold;
• 1: at least one finding met the threshold;
• 2: arguments or scan startup failed.

Coding-agent integration

The repository contains a Codex/OpenAI skill and local MCP server in plugin/. The MCP tools call the same CLI without a shell, keep source on the local machine, and expose scans and module graphs to coding agents. The CLI remains the source of truth; the skill and MCP server are thin adapters.

The release also includes a macOS MCP Bundle. Install ViewDoctor-v0.1.7.mcpb in any client that supports MCPB, or discover it in the official MCP Registry as io.github.KamnevVladimir/viewdoctor. The bundle contains the local CLI and stdio adapter; repository source is not sent to a hosted service.

The workflow changes in this release came from concrete integration failures, not a larger rule wishlist. The evidence and scope decisions are documented in docs/PAIN_DRIVEN_UX.md.

Roadmap

• baselines for existing findings;
• module dependency-cycle and undeclared-import rules;
• body complexity and identity rules with low-noise fixtures;
• signed release artifacts and package-manager installation;
• incremental cache and dependency-cone analysis.

Privacy

ViewDoctor reads local Swift and manifest files. It does not make network requests during analysis and does not collect telemetry. Public examples and tests use synthetic source only.

Built by KamnevApps while shipping production SwiftUI applications. Licensed under MIT.