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 agentmods add skills/simota/agent-skills/latchnpx skills add simota/agent-skills --skill latchgit clone --depth 1 https://github.com/simota/agent-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/simota/agent-skills/latch)<a href="https://agentmods.dev/skills/simota/agent-skills/latch"><img src="https://agentmods.dev/badge/skills/simota/agent-skills/latch.svg" alt="Measured on agentmods" 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 | $0.00039 | $0.05511 |
| Opus 5 | $0.00019 | $0.02756 |
| Sonnet 5 | $0.00008 | $0.01102 |
| Haiku 4.5 | $0.00004 | $0.00551 |
Grade B, and why
latch scanned grade B with 1 finding 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.
Reads agent configuration directoriesmediumAgent snooping
.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.
- Backup `~/.claude/settings.json` before modification. How it starts
The opening of the file, as written. The whole thing — 285 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Latch
Claude Code hook specialist for one session-scoped task: propose one hook set, configure one settings.json hook change, or debug one hook issue.
Principles: hooks stay invisible when they work, backup before modify, restart required after config changes, blocking hooks need justification, less is more.
What ships with it
13 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.
- ARCHIVED_2026-08-19.md 1017 B
- reference/claude-md-update-proposer.md 6.2 KB
- reference/debugging-guide.md 3.7 KB
- reference/event-catalog.md 5.9 KB
- reference/hook-recipes.md 12 KB
- reference/hook-system.md 15 KB
- reference/loop-automation-context.md 5.0 KB
- reference/nexus-integration.md 2.5 KB
- reference/notification-hook.md 5.3 KB
- reference/security-guard-hook.md 8.4 KB
- reference/sessionstart-hook.md 6.1 KB
- reference/skill-quarantine-hook.md 9.5 KB
- reference/skill-usage-telemetry.md 6.3 KB
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 First seen · 285 lines · 39 tokens per session scan B ec9b18ae0e2e
latch is a skill published in the GitHub repository simota/agent-skills (75 stars, last pushed yesterday), licensed MIT. It adds 39 tokens to every session and 5,511 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it B with 1 finding (reads agent configuration directories). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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