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 atournayre/claude-marketplace --skill oneshotgit clone --depth 1 https://github.com/atournayre/claude-marketplaceWrote 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/atournayre/claude-marketplace/oneshot)<a href="https://agentmods.dev/skills/atournayre/claude-marketplace/oneshot"><img src="https://agentmods.dev/badge/skills/atournayre/claude-marketplace/oneshot/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/atournayre/claude-marketplace/oneshot"><img src="https://agentmods.dev/badge/skills/atournayre/claude-marketplace/oneshot.svg" alt="Reviewed on agentmods" width="80" 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 5.1 | $0.00032 | $0.00345 |
| Opus 5 | $0.00016 | $0.00172 |
| Sonnet 5 | $0.00006 | $0.00069 |
| Haiku 4.5 | $0.00003 | $0.00034 |
Grade A, and why
oneshot 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 12d 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.
What it actually says
OneShot
Implement $ARGUMENTS at maximum speed. Ship fast, iterate later.
Workflow
1. EXPLORE (minimal)
Gather minimum viable context:
- Use
Globto find 2-3 key files by pattern - Use
Grepto search for specific patterns - Quick
WebSearchonly if library-specific API knowledge needed - NO exploration tours - find examples/edit targets and move on
2. CODE (main phase)
Execute changes immediately:
- Follow existing codebase patterns exactly
- Clear variable/method names over comments
- Stay STRICTLY in scope - change only what's needed
- NO comments unless genuinely complex
- NO refactoring beyond requirements
- Run formatters if available (
npm run format)
3. TEST (validate)
Check quality:
- Run:
npm run lint && npm run typecheck(or equivalent) - If fails: fix only what you broke, re-run
- NO full test suite unless explicitly requested
Output
When complete, return:
## Done
**Task:** {what was implemented}
**Files changed:** {list}
**Validation:** ✓ lint ✓ typecheck
Constraints
- ONE task only - no tangential improvements
- NO documentation files unless requested
- NO refactoring outside immediate scope
- NO "while I'm here" additions
- If stuck >2 attempts: report blocker and stop
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.
- 12d ago First seen · 57 lines · 32 tokens per session scan A d7bafb26f0d5
oneshot is a skill published in the GitHub repository atournayre/claude-marketplace (9 stars, last pushed 6mo ago), licensed MIT. It adds 32 tokens to every session and 345 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 2026-08-31.
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