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 terrylica/cc-skills --skill macos-fda-grant-helpergit clone --depth 1 https://github.com/terrylica/cc-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/skills/terrylica/cc-skills/macos-fda-grant-helper)<a href="https://agentmods.dev/skills/terrylica/cc-skills/macos-fda-grant-helper"><img src="https://agentmods.dev/badge/skills/terrylica/cc-skills/macos-fda-grant-helper/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/terrylica/cc-skills/macos-fda-grant-helper"><img src="https://agentmods.dev/badge/skills/terrylica/cc-skills/macos-fda-grant-helper.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 | $0.00071 | $0.01493 |
| Opus 5 | $0.00036 | $0.00746 |
| Sonnet 5 | $0.00014 | $0.00299 |
| Haiku 4.5 | $0.00007 | $0.00149 |
Grade A, and why
macos-fda-grant-helper 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 13d 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 — 102 lines — stays where its author put it; the contents beside it link to each section on GitHub.
macOS Full Disk Access Grant Walkthrough
Self-Evolving Skill: This skill improves through use. If instructions are wrong, parameters drifted, or a workaround was needed — fix this file immediately, don't defer. Only update for real, reproducible issues.
What this skill is for: when a launchd-spawned binary (or any non-interactive process) needs to read sandbox-protected paths like
~/Library/Containers/<app>/Data/..., macOS TCC will deny the access until that specific binary is added to the Full Disk Access allowlist in System Settings → Privacy & Security → Full Disk Access. We cannot grant this programmatically — Apple's design — but we can automate everything up to the manual click.
Why this exists
Discovered iter 21 (2026-05-19) after the iter-20 fleet heartbeat finally surfaced a 32-day-old chronic failure in com.terryli.maccy-backup. The launchd job had been failing daily with "Maccy DB unreadable" since 2026-04-17. Root cause: the spawn binary ~/eon/iterm2-scripts/bin/maccy-backup/maccy-backup-runner was not in the FDA allowlist. Interactive shells (iTerm2, Warp, Terminal, mise binaries) all WERE — that's why running the script manually from a terminal succeeds, hiding the problem from casual debugging.
Without this helper, the click-path is buried four levels deep in System Settings, and the absolute binary path has to be typed by hand. The helper makes it a 30-second manual operation instead of "10 minutes of fumbling, abandoned, fails for another week."
How it works
fda-grant-walkthrough performs four steps:
- Resolves the binary path to its absolute canonical form (System Settings stores absolute paths)
- Checks the current TCC database for an existing grant (fast-exits if already granted)
- Copies the absolute path to the macOS clipboard via
pbcopy - Opens System Settings directly to the FDA pane via
x-apple.systempreferences://...
The user then clicks + → Cmd+Shift+G → Cmd+V → Enter → select binary → toggle ON → authenticate.
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.
- 13d ago First seen · 102 lines · 71 tokens per session scan A b7e26f9a50c5
macos-fda-grant-helper is a skill published in the GitHub repository terrylica/cc-skills (73 stars, last pushed today), licensed MIT. It adds 71 tokens to every session and 1,493 once invoked, about $0.0004 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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