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.
npx skills add OutlineDriven/odin-claude-plugin --skill ios-build-cleanupgit clone --depth 1 https://github.com/OutlineDriven/odin-claude-pluginWrote 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/outlinedriven/odin-claude-plugin/ios-build-cleanup)<a href="https://agentmods.dev/skills/outlinedriven/odin-claude-plugin/ios-build-cleanup"><img src="https://agentmods.dev/badge/skills/outlinedriven/odin-claude-plugin/ios-build-cleanup/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/outlinedriven/odin-claude-plugin/ios-build-cleanup"><img src="https://agentmods.dev/badge/skills/outlinedriven/odin-claude-plugin/ios-build-cleanup.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 | $0.00039 | $0.00866 |
| Opus 5 | $0.00019 | $0.00433 |
| Sonnet 5 | $0.00008 | $0.00173 |
| Haiku 4.5 | $0.00004 | $0.00087 |
Grade A, and why
ios-build-cleanup 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 4d 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 — 41 lines — stays where its author put it; the contents beside it link to each section on GitHub.
iOS build cleanup
Contract
| Field | Bound contract |
|---|---|
| Trigger | The user runs /ios-build-cleanup. |
| Authority | Human-gated: requires explicit human invocation and previews the target and consequence before any irreversible deletion. The model never invokes it autonomously. |
| Side effect | Local deletion of DerivedData and build artifacts only. These artifacts are untracked and regenerable by a rebuild. No source, VCS, credential, or remote mutation. |
| Done | A clean build state is restored: DerivedData and project build artifacts are removed and the next build starts from a clean cache. |
Inputs
- Project root directory (optional; defaults to the current working directory). Used to locate project-specific build artifacts.
- DerivedData path (optional; defaults to
~/Library/Developer/Xcode/DerivedData).
Procedure
- Resolve the DerivedData directory. Default to
~/Library/Developer/Xcode/DerivedData. If the user supplies a path, use it. - Resolve the deletion targets. Within the project root, resolve project build artifacts:
.build,build/, and*.xcodeproj/*.xcworkspacebuild outputs. Under the DerivedData directory, identify this project's entries by Xcode's DerivedData naming rule: each entry is named<projectName>-<hash>, where<projectName>is the basename of the.xcodeprojor.xcworkspacefile with its extension removed and spaces replaced by the underscore character, and<hash>is Xcode's digest of that file's absolute path (a 28-character lowercase alphabetic digest of the NFD-normalized path). Apple does not document this scheme publicly; it is reproduced from Xcode's behavior bybitrise-io/go-xcodexcodecache/derived_data_path.go(xcodeProjectDerivedDataPath+xcodeDerivedDataHash, MD5 of the NFD path rendered as 28 base-26 letters). Match directories whose name is<projectName>-followed by the hash, anchoring on the exact project name and the dash. Do not match on a bare project-name prefix: a bare prefix over-matches sibling projects whose names share it (a prefix ofMyAppalso catchesMyAppTests-<hash>), and deletion is irreversible. When the DerivedData path is the shared default, match only this project's entries; when the user supplies a project-specific path, the whole directory is the target. - Enumerate every target directory and file that will be deleted. Compute the total size.
- Present the full target list and total size to the user. State the consequence: deletion is irreversible and the artifacts are untracked, but a rebuild regenerates them.
- Wait for explicit human confirmation. Do not proceed without it.
- On confirmation, delete each enumerated target, applying no filter that was not part of the enumeration.
- Verify each target no longer exists on disk.
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 4d ago Changed · -1 tokens per session 714a6e5a0b6a
- 6d ago First seen · 41 lines · 40 tokens per session scan A b3df7418ac4a
ios-build-cleanup is a skill published in the GitHub repository OutlineDriven/odin-claude-plugin (35 stars, last pushed yesterday), licensed Apache-2.0. It adds 39 tokens to every session and 866 once invoked, about $0.0002 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 2026-09-04.
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