Xcode-Disk-Cleanup-Agent-Skill AGENTS.md

Repository instructions for a safety-sensitive tool that cleans up Xcode disk files and simulator data.

In plain words
What is it for?
They guide safe cleanup changes, require exact IDs and confirmations, preserve archives and dSYMs, and require tests before completion.
Why use it?
They keep audits read-only and prevent accidental permanent deletion, unsafe wildcard commands, and removal of system-managed simulator files.

Instructions file for CodexOpenCode

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add instructions/avdlee/xcode-disk-cleanup-agent-skill/agents-md
Clone the repo
git clone --depth 1 https://github.com/AvdLee/Xcode-Disk-Cleanup-Agent-Skill

Made for: Codex, OpenCode.

Per session 123 This file is loaded in full into every session.
When invoked 123 The same file — it is already loaded in full.
Security scan A 0 findings. Scan, not verified.
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.

ModelPer sessionOnce invoked
Fable 5 $0.00123 $0.00123
Opus 5 $0.00062 $0.00062
Sonnet 5 $0.00025 $0.00025
Haiku 4.5 $0.00012 $0.00012

Measured 2d ago against content hash 113612ea40b7, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

Xcode-Disk-Cleanup-Agent-Skill 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 2d 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.md · 14 lines

What it actually says

Agent guidance

This repository contains a safety-sensitive Agent Skill.

  • Keep all audits read-only.
  • Never weaken exact-ID or confirmation checks.
  • Ordinary files move to Trash; permanent deletion is not a default.
  • Simulator deletion must use simctl and separate irreversible confirmation.
  • Archives and dSYMs remain preserve-by-default.
  • Add deterministic tests for changed classification or mutation behavior.
  • Do not introduce wildcard deletion, sudo, SIP changes, or direct removal of system-managed Simulator runtime assets.
  • Run python3 -m unittest discover -s tests -v before completing changes.
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.

  1. 2d ago First seen · 14 lines · 123 tokens per session scan A 113612ea40b7

Subscribe to this mod's changes

Xcode-Disk-Cleanup-Agent-Skill AGENTS.md is an instructions file published in the GitHub repository AvdLee/Xcode-Disk-Cleanup-Agent-Skill (51 stars, last pushed 26d ago), licensed MIT. It adds 123 tokens to every session, about $0.0006 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 2026-08-30.