Borrowing it
Nothing to install: this file belongs to fl-sean03/OpenSDL. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/fl-sean03/OpenSDL/main/.agents/skills/author-skill/SKILL.mdgit clone --depth 1 https://github.com/fl-sean03/OpenSDLWrote 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/fl-sean03/opensdl/author-skill)<a href="https://agentmods.dev/skills/fl-sean03/opensdl/author-skill"><img src="https://agentmods.dev/badge/skills/fl-sean03/opensdl/author-skill/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/fl-sean03/opensdl/author-skill"><img src="https://agentmods.dev/badge/skills/fl-sean03/opensdl/author-skill.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 | $0.00368 |
| Opus 5.5 | $0.00016 | $0.00147 |
| Sonnet 5.5 | $0.00008 | $0.00074 |
| Haiku 4.5 | $0.00004 | $0.00037 |
Grade A, and why
author-skill 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 2mo 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
Author a repository skill
Inputs
- recurring job and intended users
- three positive trigger requests
- two nearby requests that should select a different skill or no skill
- supported commands, inputs, outputs, evidence, and stop conditions
Procedure
- Read
docs/development/agent-skills.mdand the nearest.agents/AGENTS.md. - Place durable global rules in
AGENTS.md, concepts in documentation, exact behavior in typed tooling, and equipment procedures in a reviewed lab runbook. - Create or revise one canonical directory under
.agents/skills/. - Keep
SKILL.mdfocused on one job. Add only the supporting references, scripts, or assets that the procedure needs. - Use portable
nameanddescriptionfrontmatter. State what the skill does and when it applies. - Reference every supporting file and every command that the procedure depends on.
- Add or update the matching
.claude/skills/symlink. - Run
uv run --locked python scripts/validate-repository.pyand the procedure's own tests. - Forward-test positive selection, negative selection, representative execution, and continuing work in a dirty worktree.
Completion
The canonical skill validates, both supported harnesses discover it, its commands exist, and fresh tests show correct selection and completion behavior.
Stop conditions
Stop if the proposed procedure depends on a planned command, duplicates operational authority, or would store credentials, conversation transcripts, or mutable runtime state in Git.
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.
- 2mo ago First seen · 39 lines · 39 tokens per session scan A 29fe35fa13c8
author-skill is a skill published in the GitHub repository fl-sean03/OpenSDL (108 stars, last pushed 5d ago), licensed Apache-2.0. It adds 39 tokens to every session and 368 once invoked, about $0.0002 per session on Opus 5.5. 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.
author-skill compared with skills from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| author-skillfl-sean03/OpenSDL | Skill | 108 | 5d ago | Apache-2.0 | A | 39 | Claude Code, Codex |
| scitexscitex-ai/scitex-python | Skill | 86 | yesterday | AGPL-3.0 | A | 123 | Claude Code |
| stx.cliscitex-ai/scitex-python | Skill | 86 | yesterday | AGPL-3.0 | A | 33 | Claude Code, Codex |
| backendsipyourdrink-ltd/bernstein | Skill | 1.2k | yesterday | Apache-2.0 | A | 13 | Claude Code, Codex |
| seamless-remote-debuggingsjdv1982/seamless | Skill | 24 | 2d ago | none | A | 93 | Claude Code, Codex |
| seamless-adoptionsjdv1982/seamless | Skill | 24 | 2d ago | none | A | 148 | Claude Code, Codex |
| seamless-portingsjdv1982/seamless | Skill | 24 | 2d ago | none | A | 92 | Claude Code, Codex |