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.
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.
curl -O https://raw.githubusercontent.com/getsentry/XcodeBuildMCP/main/.agents/skills/xcodebuildmcp-snapshot-fixture-review/SKILL.mdgit clone --depth 1 https://github.com/getsentry/XcodeBuildMCPWrote 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.
[](https://agentmods.dev/skills/getsentry/xcodebuildmcp/xcodebuildmcp-snapshot-fixture-review)<a href="https://agentmods.dev/skills/getsentry/xcodebuildmcp/xcodebuildmcp-snapshot-fixture-review"><img src="https://agentmods.dev/badge/skills/getsentry/xcodebuildmcp/xcodebuildmcp-snapshot-fixture-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.
<a href="https://agentmods.dev/skills/getsentry/xcodebuildmcp/xcodebuildmcp-snapshot-fixture-review"><img src="https://agentmods.dev/badge/skills/getsentry/xcodebuildmcp/xcodebuildmcp-snapshot-fixture-review.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00033 | $0.00398 |
| Opus 5.5 | $0.00013 | $0.00159 |
| Sonnet 5.5 | $0.00007 | $0.00080 |
| Haiku 4.5 | $0.00003 | $0.00040 |
Grade A, and why
xcodebuildmcp-snapshot-fixture-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.
What it actually says
XcodeBuildMCP Snapshot Fixture Review
Review guardrails for fixture and snapshot contract integrity.
Review scope
- Review-only by default.
- Do not edit product code unless the user explicitly requests implementation changes.
Files to inspect
src/snapshot-tests/__fixtures__/**src/snapshot-tests/contracts.tssrc/snapshot-tests/fixture-io.tssrc/snapshot-tests/__tests__/fixture-io.test.tssrc/snapshot-tests/__tests__/json-normalize.test.tssrc/snapshot-tests/__tests__/json-fixture-schema.test.tsxcodebuildmcp.com/app/docs/_content/testing.mdx
Guardrails
- Fixture updates map to intentional behavior changes.
- Do not update fixtures only to make tests pass.
- MCP, CLI, and JSON fixture updates stay aligned.
- JSON fixtures preserve stable structured output envelopes.
- Volatile values are normalized in code, not patched ad hoc in fixtures.
- Missing fixtures are generated through the snapshot update flow.
- Verify project-defined normalization sentinels in normalization code and tests before reporting
them as implausible fixture values. In particular,
99999is an intentional sentinel for volatile UI capture counts. - Group every occurrence of the same root cause into one finding and list the affected fixtures. Do not emit separate findings for equivalent CLI, MCP, text, or JSON drift.
- Do not repeat a finding that is already resolved by the current diff.
Review limits
- Review the changed fixtures and the directly relevant normalization or contract code only.
- Do not run snapshot or smoke suites as part of an automated PR review.
- Prefer one high-confidence cross-fixture finding over multiple speculative discrepancies.
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 · 45 lines · 33 tokens per session scan A acedab362a98
xcodebuildmcp-snapshot-fixture-review is a skill published in the GitHub repository getsentry/XcodeBuildMCP (6,506 stars, last pushed 6d ago), licensed MIT. It adds 33 tokens to every session and 398 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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