Borrowing it
Nothing to install: this file belongs to jitrapon/astro-mobile. 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/jitrapon/astro-mobile/main/.claude/skills/update-xcode/SKILL.mdgit clone --depth 1 https://github.com/jitrapon/astro-mobileWrote 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/jitrapon/astro-mobile/update-xcode)<a href="https://agentmods.dev/skills/jitrapon/astro-mobile/update-xcode"><img src="https://agentmods.dev/badge/skills/jitrapon/astro-mobile/update-xcode/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/jitrapon/astro-mobile/update-xcode"><img src="https://agentmods.dev/badge/skills/jitrapon/astro-mobile/update-xcode.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 | $0.00232 | $0.04751 |
| Opus 5.5 | $0.00093 | $0.01900 |
| Sonnet 5.5 | $0.00046 | $0.00950 |
| Haiku 4.5 | $0.00023 | $0.00475 |
Grade E, and why
update-xcode scanned grade E with 4 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.
Asks for rootmediumPrivilege escalation
A mod that escalates privileges can change anything on the machine, not only the project.
`sudo xcode-select -s`, and stop there. The pin has not moved, so Phases 2–6 do Reads agent configuration directoriesmediumAgent snooping
.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.
grep -rn "Xcode-" .claude/CLAUDE.md .claude/skills/ios-device-debug/SKILL.md .claude/settings.local.json Enumerates other installed skillsmediumAgent snooping
Other skills' SKILL.md files reveal prompts, capabilities and secrets that should be invisible to peers.
xcode-select -p # the active developer dir grep -rn "Xcode-" .claude/CLAUDE.md .claude/skills/ios-device-debug/SKILL.md .claude/settings.local.json Recursive force deletehighDestructive command
rm -rf with a variable or a broad path is one typo away from removing the wrong tree.
rm -rf .claude/skills/adopt-c-bounds-safety \ The source is not reproduced here
No licence file
A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.
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 Changed · +63 lines · +30 tokens per session f4e87a37a134
- 1mo ago Changed · +34 lines 7bb5e1923826
- 2mo ago First seen · 229 lines · 202 tokens per session scan E afce84ccb718
update-xcode is a skill published in the GitHub repository jitrapon/astro-mobile (11 stars, last pushed 3d ago), with no licence file. It adds 232 tokens to every session and 4,751 once invoked, about $0.0009 per session on Opus 5.5. A static security scan graded it E with 4 findings (asks for root, reads agent configuration directories, enumerates other installed skills). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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