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 Xopoko/build-swift-apps --skill macos-signing-inspectorgit clone --depth 1 https://github.com/Xopoko/build-swift-appsWrote 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/xopoko/build-swift-apps/macos-signing-inspector)<a href="https://agentmods.dev/skills/xopoko/build-swift-apps/macos-signing-inspector"><img src="https://agentmods.dev/badge/skills/xopoko/build-swift-apps/macos-signing-inspector/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/xopoko/build-swift-apps/macos-signing-inspector"><img src="https://agentmods.dev/badge/skills/xopoko/build-swift-apps/macos-signing-inspector.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 2 findings, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium Rogue Agent · line 27 Skill establishes unauthorized persistence across sessions via cron jobs, startup scripts, or state files. Session persistence allows an attacker to maintain access beyond the current interaction.Fix: Remove any persistence mechanisms (cron jobs, startup scripts, state files). Skills should not maintain state across sessions without explicit user consent.
- medium Rogue Agent · line 48 Skill establishes unauthorized persistence across sessions via cron jobs, startup scripts, or state files. Session persistence allows an attacker to maintain access beyond the current interaction.Fix: Remove any persistence mechanisms (cron jobs, startup scripts, state files). Skills should not maintain state across sessions without explicit user consent.
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 | $0.00040 | $0.00574 |
| Opus 5 | $0.00020 | $0.00287 |
| Sonnet 5 | $0.00008 | $0.00115 |
| Haiku 4.5 | $0.00004 | $0.00057 |
Grade A, and why
macos-signing-inspector 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 11d 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 — 67 lines — stays where its author put it; the contents beside it link to each section on GitHub.
macOS Signing Inspector
Before invoking Apple-only binaries, confirm the execution context is macOS. From Windows or Linux, run those steps in a Mac SSH project or through an already configured remote transport; do not retry missing Apple binaries locally.
Quick Start
Use this skill when the failure smells like codesigning rather than compilation: launch refusal, missing entitlement, invalid signature, sandbox mismatch, hardened runtime confusion, or trust-policy rejection.
Use macos-notarization-packager when the goal is a distributable notarized artifact. Use appstore-notary-runner when the next step is executing asc notarization submit/status/log/staple commands.
Workflow
-
Inspect the bundle or binary.
- Locate the
.appor executable. - Identify the main binary inside
Contents/MacOS/.
- Locate the
-
Read signing details.
- Use
codesign -dvvv --entitlements :- <path>. - Use
spctl -a -vv <path>when Gatekeeper behavior matters. - Use
plutil -pfor entitlements or Info.plist inspection.
- Use
-
Classify the failure.
- Unsigned or ad hoc signed
- Wrong identity
- Entitlement mismatch
- Hardened runtime issue
- App Sandbox issue
- Nested code signing issue
- Distribution/notarization prerequisite issue
-
Explain the minimum fix path.
- Say exactly what is wrong.
- Show the shortest set of validation or repair commands.
- Distinguish local development problems from distribution problems.
Useful Commands
codesign -dvvv --entitlements :- <app-or-binary>spctl -a -vv <app-or-binary>security find-identity -p codesigning -vplutil -p <path-to-entitlements-or-plist>
Guardrails
- Never invent missing entitlements.
- Do not conflate notarization with local debug signing.
- If the real issue is a build setting or provisioning profile, say so directly.
Output Expectations
Provide:
- what artifact was inspected
- what signing state it is in
- the exact failure class
- the minimum fix or validation sequence
What ships with it
2 files 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.
- 11d ago First seen · 67 lines · 40 tokens per session scan A f43cecbcc8fa
macos-signing-inspector is a skill published in the GitHub repository Xopoko/build-swift-apps (45 stars, last pushed 14d ago), licensed MIT. It adds 40 tokens to every session and 574 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 2026-08-30.
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