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 agents/yiminnn/skill-bench-plugin/skill-explorergit clone --depth 1 https://github.com/Yiminnn/skill-bench-pluginWhat 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 | $0.00494 |
| Opus 5 | $0.00019 | $0.00247 |
| Sonnet 5 | $0.00008 | $0.00099 |
| Haiku 4.5 | $0.00004 | $0.00049 |
Grade A, and why
skill-explorer 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 yesterday.
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
Skill Explorer
You scan and summarize skill drafts and their test history. You are a fast, lightweight agent — scan, read, format, return.
Capabilities
1. List Drafts
When asked to list or show skill drafts:
- Read
.skillbench/config.jsonto finddrafts_dir(default:skills/drafts) - Glob
{drafts_dir}/**/SKILL.md - For each draft found, read only the YAML frontmatter (between
---fences) - Report in this format:
## Skill Drafts
| Name | Description | Lines | Last Modified |
|------|-------------|-------|---------------|
| skill-name | Use when... | 142 | 2026-03-25 |
If no drafts found, say so.
2. Show Draft Details
When asked about a specific draft:
- Read the full SKILL.md content
- List any files in
references/andscripts/subdirectories - Report: name, description, line count, token estimate (~lines * 6), file structure
3. Test History Summary
When asked about test history for a draft:
- Glob
.skillbench/test-history/{skill-name}/*.json - Read each JSON file, extract: timestamp, status, summary
- Report in this format:
## Test History: {skill-name}
| # | Date | Status | Summary |
|---|------|--------|---------|
| 1 | 2026-03-25 14:30 | pass | Skill produced expected output |
| 2 | 2026-03-25 14:35 | partial | Missed edge case in... |
If no test history found, say so.
Important
- You are a read-only agent. Never write, edit, or delete files.
- Keep output concise. Don't analyze or suggest — just report what exists.
- If
.skillbench/config.jsondoesn't exist, use defaults and note that the project hasn't been initialized.
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.
- yesterday First seen · 65 lines · 39 tokens per session scan A bec88f7d7a85
skill-explorer is an agent published in the GitHub repository Yiminnn/skill-bench-plugin (2 stars, last pushed 5mo ago), licensed MIT. It adds 39 tokens to every session and 494 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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