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 donggua-zen/guada --skill skill-installergit clone --depth 1 https://github.com/donggua-zen/guadaWrote 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/donggua-zen/guada/skill-installer)<a href="https://agentmods.dev/skills/donggua-zen/guada/skill-installer"><img src="https://agentmods.dev/badge/skills/donggua-zen/guada/skill-installer/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/donggua-zen/guada/skill-installer"><img src="https://agentmods.dev/badge/skills/donggua-zen/guada/skill-installer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 2 findings, up to high
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- high Rogue Agent · line 39 Skill modifies its own code, configuration, or behavior at runtime. Self-modification enables an agent to escalate privileges, disable safety constraints, or install persistent backdoors.Fix: Prevent the skill from modifying its own code, SKILL.md, or configuration files. Treat skill files as read-only at runtime.
- medium Rogue Agent · line 39 Skill establishes unauthorized persistence across sessions via cron jobs, startup scripts, or state files. Session persistence allows an attacker to maintain access beyond the current interaction.Fix: Remove any persistence mechanisms (cron jobs, startup scripts, state files). Skills should not maintain state across sessions without explicit user consent.
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 | $0.00048 | $0.01556 |
| Opus 5.5 | $0.00019 | $0.00622 |
| Sonnet 5.5 | $0.00010 | $0.00311 |
| Haiku 4.5 | $0.00005 | $0.00156 |
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 7d 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 — 181 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Skill Installer — Skill Installation & Management Guide
Overview
This skill guides you through installing, updating, and uninstalling skills. The core workflow is:
Download/Prepare → Validate (must pass) → Install to {SKILL_DIR}/<name>/
Target directory: {SKILL_DIR}/ (Windows: C:\Users\<username>\.guada\skills\)
1. Installation Workflow
All installation methods follow the same three-step workflow.
1.1 Download — to Working Directory
Place the skill source in the current working directory, not the target directory:
# Git clone
git clone https://github.com/.../repo.git ./<skill-name>
# ZIP extraction
unzip skill.zip -d ./<skill-name>
# Manual creation
mkdir ./<skill-name> (then edit SKILL.md)
1.2 Validate — Must Pass
Run the bundled validation script before installing. The script lives in this skill's own directory (scripts/validate-skill.mjs), relative to the resourceBase directory returned by skill_learn. Run it from that directory:
node scripts/validate-skill.mjs ./<skill-name>
All 14 checks must pass before proceeding. If validation fails, fix the reported issues and re-run until it passes.
1.3 Install — Move to Skills Directory
Once validated, move the directory to the target location:
mv ./<skill-name> {SKILL_DIR}/<skill-name>
The file watcher automatically detects and registers the skill within seconds.
2. Installation Methods
2.1 From Git Repository
Best for: Published skills, team-shared skills, version history.
Required from user:
- Git URL (required): e.g.
https://github.com/owner/repoor[email protected]:owner/repo.git - Branch (optional): specific branch (defaults to repo default)
- Subdirectory (optional): path in monorepos where the skill lives
Steps:
- Validate Git URL format (must start with
http://,https://, orgit@) - Clone to current working directory:
git clone --depth 1 <url> ./temp-<name> - Locate SKILL.md (search root, then 1-2 levels deep)
- Extract
namefrom frontmatter - Run validation script (must pass)
- Check for naming conflicts in target directory
- Move to
{SKILL_DIR}/<name>/ - Clean up temp files
- File watcher auto-detects and registers
What ships with it
1 file 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.
- 7d ago Changed · -1 lines a40fd368691e
- 1mo ago First seen · 182 lines · 48 tokens per session scan A 29f386e7b350
skill-installer is a skill published in the GitHub repository donggua-zen/guada (63 stars, last pushed yesterday), licensed MIT. It adds 48 tokens to every session and 1,556 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.
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