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 urmzd/dotfiles --skill extend-oss-skills-to-claudegit clone --depth 1 https://github.com/urmzd/dotfilesWrote 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/urmzd/dotfiles/extend-oss-skills-to-claude)<a href="https://agentmods.dev/skills/urmzd/dotfiles/extend-oss-skills-to-claude"><img src="https://agentmods.dev/badge/skills/urmzd/dotfiles/extend-oss-skills-to-claude/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/urmzd/dotfiles/extend-oss-skills-to-claude"><img src="https://agentmods.dev/badge/skills/urmzd/dotfiles/extend-oss-skills-to-claude.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 | $0.00074 | $0.02358 |
| Opus 5.5 | $0.00030 | $0.00943 |
| Sonnet 5.5 | $0.00015 | $0.00472 |
| Haiku 4.5 | $0.00007 | $0.00236 |
Grade A, and why
extend-oss-skills-to-claude 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 1mo 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 — 289 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Extend OSS Skills to Claude Code
Prerequisite: read
create-oss-skillfirst. That skill owns the base agentskills.io format and shared reference material (description optimization, eval workflow). This skill contains only the Claude Code-specific deltas (invocation control, subagent execution, dynamic context injection, model/effort overrides, deployment scoping).
Take a standard agentskills.io skill and layer on Claude Code execution features. The base spec defines a portable file format; Claude Code turns it into an execution framework.
What the Standard Covers
The open standard defines: name (required), description (required), license, compatibility, metadata, allowed-tools (space-delimited). These fields work across all compatible agents (Cursor, Gemini CLI, OpenCode, Goose, etc.). Start with create-oss-skill for the base format.
Claude Code Extended Frontmatter
These fields are Claude Code-specific. Other agents ignore them.
| Field | Type | Default | Purpose |
|---|---|---|---|
argument-hint |
string | none | Autocomplete hint: [issue-number], [filename] [format] |
disable-model-invocation |
bool | false |
true = only the user can trigger via /name. Removes from agent context entirely. |
user-invocable |
bool | true |
false = hidden from / menu. Agent-only background knowledge. |
model |
string | session | Override model when skill is active. |
effort |
string | session | Override reasoning effort: low, medium, high, max. |
context |
string | none | fork = run in isolated subagent context. |
agent |
string | general-purpose |
Subagent type when context: fork. Built-in: Explore, Plan, general-purpose. Custom: any .claude/agents/ definition. |
hooks |
object | none | Lifecycle hooks scoped to this skill. See hooks docs. |
Differences from Standard
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.
- 1mo ago First seen · 289 lines · 74 tokens per session scan A efa1040960c9
extend-oss-skills-to-claude is a skill published in the GitHub repository urmzd/dotfiles (5 stars, last pushed 6d ago), licensed Apache-2.0. It adds 74 tokens to every session and 2,358 once invoked, about $0.0003 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 2026-08-31.
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