Borrowing it
Nothing to install: this file belongs to markdavidgan/apple-dev-skills. 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/markdavidgan/apple-dev-skills/main/AGENTS.mdgit clone --depth 1 https://github.com/markdavidgan/apple-dev-skillsWrote 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/markdavidgan/apple-dev-skills/agents-md)<a href="https://agentmods.dev/instructions/markdavidgan/apple-dev-skills/agents-md"><img src="https://agentmods.dev/badge/instructions/markdavidgan/apple-dev-skills/agents-md/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/instructions/markdavidgan/apple-dev-skills/agents-md"><img src="https://agentmods.dev/badge/instructions/markdavidgan/apple-dev-skills/agents-md.svg" alt="Reviewed on agentmods" width="80" 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 | $0.02489 | $0.02489 |
| Opus 5.5 | $0.00996 | $0.00996 |
| Sonnet 5.5 | $0.00498 | $0.00498 |
| Haiku 4.5 | $0.00249 | $0.00249 |
Grade A, and why
apple-dev-skills 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 1mo 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.
Copies of this mod
2 near-identical copies found in the catalogue:
- apple-dev-skills CLAUDE.md — 94% identical, 15 lines differ
- apple-dev-skills GEMINI.md — 94% identical, 11 lines differ
How it starts
The opening of the file, as written. The whole thing — 248 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Apple Dev Skills — Agent Guide (Codex / Kimi / cross-CLI)
Cross-CLI copy of the project guide, generated verbatim from
CLAUDE.md. Read by Codex CLI, Kimi Code, and any agent following the AGENTS.md convention.Tool mapping: Claude Code's
Skill/Agent/Read/Edit/Bashtools map to your CLI's equivalents. Skills are markdownSKILL.mdfiles discovered from your CLI's skills directory (Codex:.agents/skills/; Kimi:~/.kimi-code/skills/). See "Cross-Platform Constraints" below for per-CLI limits (e.g. no agents on Kimi / Codex; no commands on Codex).
This is the standalone Apple development skill repository. It is not part of aether-agent-plugins.
Quick Reference
| Task | Command |
|---|---|
| Validate source | node scripts/validate.js |
| Build platforms | node scripts/build.js |
| Install locally | ./install.sh --platform claude --local |
| Install globally | ./install.sh --platform claude |
Repository Rules
- Edit source, not generated platform bundles — skill/agent/command changes begin in
src/. Never hand-editplatforms/,.claude-plugin/, or.cursor-plugin/; they are generated byscripts/build.js. - Run validation before committing —
node scripts/validate.jsmust pass. - Regenerate after source edits — After changing any
src/file, runnode scripts/build.jsand commit source + generated outputs together. - Keep skills self-contained — Cross-reference other skills by name, not by installation-specific file path.
- YAML frontmatter is required — Every
SKILL.md, agent, and command must have valid frontmatter. - Stay machine-agnostic — Never commit absolute clone paths or credentials.
src/mcp/*/mcp.jsonmust keep placeholders/env-var references; real paths/keys belong in machine-local client config. - Product repositories own their overlays. Generic methodology belongs here; consumer repos commit only their product/repository-specific binding layer.
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.
- 1mo ago First seen · 248 lines · 2,489 tokens per session scan A 452398555a39
apple-dev-skills AGENTS.md is an instructions file published in the GitHub repository markdavidgan/apple-dev-skills (5 stars, last pushed 1mo ago), licensed MIT. It adds 2,489 tokens to every session, about $0.0100 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 2026-08-31.
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