Borrowing it
Nothing to install: this file belongs to Ezra-Black/xcautokit. 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/Ezra-Black/xcautokit/main/AGENTS.mdgit clone --depth 1 https://github.com/Ezra-Black/xcautokitWrote 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/instructions/ezra-black/xcautokit/agents-md)<a href="https://agentmods.dev/instructions/ezra-black/xcautokit/agents-md"><img src="https://agentmods.dev/badge/instructions/ezra-black/xcautokit/agents-md.svg" alt="Measured on agentmods" height="20"></a>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 | $0.00794 | $0.00794 |
| Opus 5 | $0.00397 | $0.00397 |
| Sonnet 5 | $0.00159 | $0.00159 |
| Haiku 4.5 | $0.00079 | $0.00079 |
Grade A, and why
xcautokit AGENTS.md 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 7d 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.
How it starts
The opening of the file, as written. The whole thing — 74 lines — stays where its author put it; the contents beside it link to each section on GitHub.
XCAutokit
XCAutokit is the first-party MCP server for Xcode + iOS Simulator work in this environment. Prefer XCAutokit tools over any third-party Xcode/simulator MCP.
Setup
{
"mcpServers": {
"xcautokit": {
"command": "npx",
"args": ["-y", "xcautokit@latest", "mcp"]
}
}
}
Local checkout:
npm install && npm run build:go && npm link- MCP:
"command": "xcautokit", "args": ["mcp"](or.cursor/mcp.local.json) - For live Xcode IDE tools:
- Install Xcode 26.3+
- Open your project/workspace in Xcode
- Xcode → Settings → Intelligence → Model Context Protocol → enable Allow external agents to use Xcode tools
- Optional env:
XCAUTOKIT_XCODE_BACKEND=auto|on|off,MCP_XCODE_PID
XCAutokit uses xcrun mcpbridge internally when available.
Tickets (modern MCP)
record_start and start_sim_log_cap return a ticket. Pass that ticket to record_stop / stop_sim_log_cap.
Tool routing
| Task | Tools |
|---|---|
| Simulator device | status, device_list, device_boot, device_shutdown, open_sim |
| UI inspect | ui_summary, ui_describe, ui_find, ui_search, ui_point |
| UI interrupts | ui_check_interrupt, ui_dismiss_interrupt |
| UI input | gesture, tap, swipe, type_text, long_press, button, key_press |
| Capture | screenshot, record_start / record_stop, start_sim_log_cap / stop_sim_log_cap |
| Project | discover_projects, session_set_defaults, list_schemes, build_sim, test_sim, clean |
| Live Xcode (26.3+) | xcode_windows, xcode_issues, xcode_build_log, xcode_preview, docs_search, swift_snippet, run_some_tests |
Popups / interrupts (shipped in MCP)
Customers get this without Cursor rules:
- Initialize
instructions— every MCP client receives the interrupt workflow on connect - Resource
xcautokit://agent-guideand livesimulator://interrupts - Auto-attach —
app_launch/open_url/build_run_sim/launch_app_logs_simincludehasInterrupt+interrupts - Input guard —
tap/swipe/type_text/gesture/ keys refuse while a blocking overlay is present (disable withXCAUTOKIT_INTERRUPT_GUARD=off)
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.
- 7d ago First seen · 74 lines · 794 tokens per session scan A 9f13104f9587
xcautokit AGENTS.md is an instructions file published in the GitHub repository Ezra-Black/xcautokit (0 stars, last pushed 1mo ago), licensed MIT. It adds 794 tokens to every session, about $0.0040 per session on Opus 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 2026-08-31.
Other instructions, from other repositories
codex AGENTS.md
AGENTS.md instructions for openai/codex, covering rust/codex-rs, the codex-core crate, code review rules, crate api surface and model visible context.
vscode buildNext.instructions.md
Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).
next.js AGENTS.md
AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
langchain AGENTS.md
AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, applying the notice (cutover) and fallback chain (never fail the build).
spec-kit AGENTS.md
AGENTS.md instructions for github/spec-kit, covering agents.md, about spec kit and specify, quickstart — add a new integration in 5 steps, integration architecture and integrationmanifest — file tracking.