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/skillscatalog/registry/skill-installernpx skills add SkillsCatalog/registry --skill skill-installergit clone --depth 1 https://github.com/SkillsCatalog/registryWrote 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/skillscatalog/registry/skill-installer)<a href="https://agentmods.dev/skills/skillscatalog/registry/skill-installer"><img src="https://agentmods.dev/badge/skills/skillscatalog/registry/skill-installer.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 | $0.00029 | $0.00632 |
| Opus 5 | $0.00015 | $0.00316 |
| Sonnet 5 | $0.00006 | $0.00126 |
| Haiku 4.5 | $0.00003 | $0.00063 |
Grade A, and why
skill-installer 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 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.
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 — 112 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Instructions
Use this skill to install Agent Skills from local directories or the catalog to your preferred harness.
Supported Harnesses
| Harness | Install Path | Status |
|---|---|---|
| Claude Code | ~/.claude/skills/{name}/ |
Supported |
| Goose | ~/.config/goose/skills/{name}/ |
Supported |
| OpenCode | .opencode/skill/{name}/ |
Supported |
| Cursor | .cursor/skills/{name}/ |
Supported |
How to Use
Install from local directory:
python3 install_skill.py /path/to/my-skill --harness claude-code
python3 install_skill.py ./my-skill --harness goose
Install from catalog:
python3 install_skill.py anthropic/document-skills --harness claude-code
python3 install_skill.py anthropic/document-skills --harness goose
Auto-detect harness:
python3 install_skill.py /path/to/my-skill
# Detects installed harnesses and prompts for selection
List installed skills:
python3 install_skill.py --list
python3 install_skill.py --list --harness claude-code
Uninstall a skill:
python3 install_skill.py --uninstall my-skill --harness claude-code
Output
Installing skill: document-skills
Source: /path/to/document-skills
Target: ~/.claude/skills/document-skills/
Copying files...
SKILL.md
scripts/pdf_tools.py
references/templates/
Success! Skill installed to Claude Code.
To use: The skill will be available in your next Claude Code session.
Examples
Install to Claude Code:
User: Install the skill at ./my-pdf-tool to Claude Code
Agent: Installing skill to Claude Code...
Installed: my-pdf-tool
Location: ~/.claude/skills/my-pdf-tool/
Files: 3 files copied
Restart Claude Code to use the new skill.
Install to multiple harnesses:
User: Install ./my-skill to both Claude Code and Goose
Agent: Installing to Claude Code... Done
Installing to Goose... Done
Skill installed to 2 harnesses.
What ships with it
2 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.
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 · 112 lines · 29 tokens per session scan A 3fbfb9a95020
skill-installer is a skill published in the GitHub repository SkillsCatalog/registry (1 stars, last pushed 8mo ago), licensed MIT. It adds 29 tokens to every session and 632 once invoked, about $0.0001 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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