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 PracticalSwan/agent-skills --skill sharing-skillsgit clone --depth 1 https://github.com/PracticalSwan/agent-skillsWrote 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/practicalswan/agent-skills/sharing-skills)<a href="https://agentmods.dev/skills/practicalswan/agent-skills/sharing-skills"><img src="https://agentmods.dev/badge/skills/practicalswan/agent-skills/sharing-skills/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/practicalswan/agent-skills/sharing-skills"><img src="https://agentmods.dev/badge/skills/practicalswan/agent-skills/sharing-skills.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 5 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 55 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.
- high Prompt Injection · line 194 Hidden instructions were detected in comments or invisible text. These could contain malicious directives. Manual review is recommended.Fix: Audit all comments and invisible characters. Remove any instructions that direct the agent to perform unauthorized actions. Use plain, reviewable content.
- high Prompt Injection · line 215 Hidden instructions were detected in comments or invisible text. These could contain malicious directives. Manual review is recommended.Fix: Audit all comments and invisible characters. Remove any instructions that direct the agent to perform unauthorized actions. Use plain, reviewable content.
- medium Rogue Agent · line 14 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.
- medium Agent Snooping · line 119 Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
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 | $0.00014 | $0.01538 |
| Opus 5 | $0.00007 | $0.00769 |
| Sonnet 5 | $0.00003 | $0.00308 |
| Haiku 4.5 | $0.00001 | $0.00154 |
Grade A, and why
sharing-skills scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 4d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 240 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Sharing Skills
Overview
Contribute skills from your local branch back to the upstream repository.
Workflow: Branch → Edit/Create skill → Commit → Push → PR
When to Share
Share when:
- Skill applies broadly (not project-specific)
- Pattern/technique others would benefit from
- Well-tested and documented
- Follows writing-skills guidelines
Keep personal when:
- Project-specific or organization-specific
- Experimental or unstable
- Contains sensitive information
- Too narrow/niche for general use
Prerequisites
ghCLI installed and authenticated- Working directory is
~/.config/superpowers/skills/(your local clone) - Skill has been tested (see writing-skills for TDD process)
Sharing Workflow
1. Ensure You're on Main and Synced
cd ~/.config/superpowers/skills/
git checkout main
git pull upstream main
git push origin main # Push to your fork
2. Create Feature Branch
# Branch name: add-skillname-skill
skill_name="your-skill-name"
git checkout -b "add-${skill_name}-skill"
3. Create or Edit Skill
# Work on your skill in skills/
# Create new skill or edit existing one
# Skill should be in skills/category/skill-name/SKILL.md
4. Commit Changes
# Add and commit
git add skills/your-skill-name/
git commit -m "Add ${skill_name} skill
$(cat <<'EOF'
Brief description of what this skill does and why it's useful.
Tested with: [describe testing approach]
EOF
)"
5. Push to Your Fork
git push -u origin "add-${skill_name}-skill"
6. Create Pull Request
# Create PR to upstream using gh CLI
gh pr create \
--repo upstream-org/upstream-repo \
--title "Add ${skill_name} skill" \
--body "$(cat <<'EOF'
## Summary
Brief description of the skill and what problem it solves.
## Testing
Describe how you tested this skill (pressure scenarios, baseline tests, etc.).
## Context
Any additional context about why this skill is needed and how it should be used.
EOF
)"
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.
- 4d ago Changed d6db182a96e2
- 6d ago Changed c99f9f00b5a0
- 9d ago First seen · 240 lines · 14 tokens per session scan A 3428eed3b643
sharing-skills is a skill published in the GitHub repository PracticalSwan/agent-skills (14 stars, last pushed 4d ago), licensed MIT. It adds 14 tokens to every session and 1,538 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 2026-09-03.
Other skills, from other repositories
git-workflow-and-versioning
Structures git workflow practices. Use when making any code change. Use when committing, branching, resolving conflicts, splitting uncommitted work in a messy working tree into clean atomic commits, opening or reviewing a pull request (PR), pushing to a remote, or when you need to organize work across multiple…
chinese-commit-conventions
A Chinese-language guide to Conventional Commits, a format for writing consistent Git commit messages, plus related changelog, commit-checking, and commit-helper configuration.
commit
Skill "commit" from clacky-ai/openclacky, covering smart commit skill, critical requirement: single-line commits only, core philosophy, usage and process steps.
comet-safe-delivery
A Chinese-language procedure for safely delivering specified Comet changes through Git. It covers checking worktrees and unrelated edits, staging exact files, validating hooks, and authorized commits or pushes.
ac-commit-manager
Manage git commits for autonomous coding. Use when committing feature implementations, creating descriptive commits, managing git workflow, or handling version control.
agent-commit
Analyze changes and create a meaningful commit with agent authorship. Internal skill for evolveloop.