What is xcodebuildmcp-tool-contract-review?

A review checklist for changes to XcodeBuildMCP tool contracts, including their implementation, manifests, workflows, output descriptions, and follow-up templates. XcodeBuildMCP is a system that exposes Xcode build actions to agents through tools.

Use it to review new or changed tool definitions, check manifest and workflow membership, confirm output schemas and identifiers, and run the project’s type-checking validation.

It catches mismatches that can make a tool unavailable, incorrectly described, or inconsistent across code and configuration. The review is read-only unless implementation work is explicitly requested.

How getsentry/XcodeBuildMCP configures Claude Code and Codex

About the project

XcodeBuildMCP is an MCP server and command-line tool that gives coding agents tools for building and working on iOS and macOS projects. It supports workflows involving Xcode and xcodebuild, including project builds and device-related operations. Its catalogue add-ons provide agent instructions and connections for using the MCP server and CLI.

getsentry/XcodeBuildMCP · 6,506 stars · on GitHub · xcodebuildmcp.com

Reuse

Borrowing it

Nothing to install: this file belongs to getsentry/XcodeBuildMCP. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/getsentry/XcodeBuildMCP/main/.agents/skills/xcodebuildmcp-tool-contract-review/SKILL.md

Clone the repo

git clone --depth 1 https://github.com/getsentry/XcodeBuildMCP

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/getsentry/xcodebuildmcp/xcodebuildmcp-tool-contract-review/github.svg)](https://agentmods.dev/skills/getsentry/xcodebuildmcp/xcodebuildmcp-tool-contract-review)

Your own site

<a href="https://agentmods.dev/skills/getsentry/xcodebuildmcp/xcodebuildmcp-tool-contract-review"><img src="https://agentmods.dev/badge/skills/getsentry/xcodebuildmcp/xcodebuildmcp-tool-contract-review/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/getsentry/xcodebuildmcp/xcodebuildmcp-tool-contract-review"><img src="https://agentmods.dev/badge/skills/getsentry/xcodebuildmcp/xcodebuildmcp-tool-contract-review.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 37 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 367 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits

NVIDIA SkillSpector warn 7 Sept 2026

SkillSpector: 1 finding, up to medium

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

medium MCP Rug Pull · line 43
npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.

Fix: Pin the version: npx @scope/[email protected]

How audits are shown

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00037	$0.00367
Opus 5.5	$0.00015	$0.00147
Sonnet 5.5	$0.00007	$0.00073
Haiku 4.5	$0.00004	$0.00037

Measured 2mo ago against content hash 5b596ed25e2e, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

xcodebuildmcp-tool-contract-review scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.agents/skills/xcodebuildmcp-tool-contract-review/SKILL.md · 44 lines

What it actually says

XcodeBuildMCP Tool Contract Review

Review guardrails for tool contract changes across implementation, manifests, and workflow exposure.

Review scope

Review-only by default.
Do not edit product code unless the user explicitly requests implementation changes.

Files to inspect

src/mcp/tools/**
manifests/tools/*.yaml
manifests/workflows/*.yaml
src/core/manifest/schema.ts
src/runtime/tool-catalog.ts
src/runtime/types.ts
xcodebuildmcp.com/app/docs/_content/tool-authoring.mdx
xcodebuildmcp.com/app/docs/_content/architecture-manifest-visibility.mdx

Guardrails

Manifest id matches filename.
Manifest module points to implementation path without extension.
Tool module exports named schema and handler.
names.mcp remains globally unique.
names.cli stays workflow-local and consistent with CLI docs/fixtures.
Tool appears in at least one workflow unless intentionally hidden by availability.
outputSchema is present for tools that set ctx.structuredOutput.
nextSteps.toolId references existing manifest tool IDs.
Avoid parallel legacy paths or duplicate implementation paths.

Validation

npm run typecheck
npm test -- src/core/manifest/__tests__/schema.test.ts
npm test -- src/runtime/__tests__/tool-invoker.test.ts
npx skill-check .agents/skills/xcodebuildmcp-tool-contract-review

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

2mo ago First seen · 44 lines · 37 tokens per session scan A 5b596ed25e2e

Subscribe to this mod's changes

xcodebuildmcp-tool-contract-review is a skill published in the GitHub repository getsentry/XcodeBuildMCP (6,506 stars, last pushed 7d ago), licensed MIT. It adds 37 tokens to every session and 367 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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code-review

Reviews a supplied code path or diff for correctness, security, maintainability, and style without executing or modifying it.

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XcodeBuildMCP: Skill for Claude Code