Borrowing it
Nothing to install: this file belongs to stacklok/toolhive-studio. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/stacklok/toolhive-studio/main/.claude/skills/skill-creator/SKILL.mdgit clone --depth 1 https://github.com/stacklok/toolhive-studioWrote 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/stacklok/toolhive-studio/skill-creator)<a href="https://agentmods.dev/skills/stacklok/toolhive-studio/skill-creator"><img src="https://agentmods.dev/badge/skills/stacklok/toolhive-studio/skill-creator/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/stacklok/toolhive-studio/skill-creator"><img src="https://agentmods.dev/badge/skills/stacklok/toolhive-studio/skill-creator.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 2 findings, up to medium
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 →
- medium Excessive Agency · line 50 Skill enables autonomous high-impact decisions without human-in-the-loop verification. Critical operations (destructive commands, financial transactions, data deletion) should require explicit user confirmation.Fix: Add human-in-the-loop confirmation for destructive, irreversible, or high-impact operations. Never auto-execute commands that modify files, send data, or alter system state.
- medium Agent Snooping · line 60 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 | $0.00040 | $0.00712 |
| Opus 5.5 | $0.00016 | $0.00285 |
| Sonnet 5.5 | $0.00008 | $0.00142 |
| Haiku 4.5 | $0.00004 | $0.00071 |
Grade A, and why
skill-creator 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 2mo 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 — 84 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Skill Creator
Create AI agent skills that work across Claude Code, Codex, and Cursor.
Workflow
- Claude is canonical - Always create/edit in
.claude/skills/<name>/first - Replicate with CLI - Copy to
.codex/skills/and.cursor/skills/usingcp -r - Format differences - Use
sedonly if agent-specific tweaks are needed (rare)
Directory Structure
.claude/skills/<skill-name>/
├── SKILL.md # Required - instructions + metadata
├── references/ # Optional - supporting documentation
├── scripts/ # Optional - executable helpers
└── assets/ # Optional - templates, resources
.codex/skills/<skill-name>/ # Copy of Claude's
.cursor/skills/<skill-name>/ # Copy of Claude's
SKILL.md Format
---
name: skill-name # Required: lowercase, hyphens, max 64 chars
description: What it does... # Required: triggers auto-selection by agent
allowed-tools: Read, Grep, Bash # Optional: Claude-specific (ignored by others)
model: claude-opus-4-5-20251101 # Optional: Claude-specific (ignored by others)
---
# Skill Title
Instructions in markdown...
Required Fields
name: Lowercase with hyphens, must match directory namedescription: Explains what the skill does and when to use it. Include keywords users would say to help the agent auto-select this skill.
Optional Fields (Claude-specific, ignored by other agents)
allowed-tools: Tools the agent can use without asking permissionmodel: Override the model for this skillcontext: fork: Run in isolated subagent context
Creating a New Skill
- Ask the user what the skill should do
- Choose a descriptive name (lowercase, hyphens)
- Create the Claude skill:
mkdir -p .claude/skills/<name> - Write
.claude/skills/<name>/SKILL.mdwith proper frontmatter - Replicate to other agents:
cp -r .claude/skills/<name> .codex/skills/ cp -r .claude/skills/<name> .cursor/skills/
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.
- 2mo ago First seen · 84 lines · 40 tokens per session scan A 38ee7f6d21d8
skill-creator is a skill published in the GitHub repository stacklok/toolhive-studio (173 stars, last pushed today), licensed Apache-2.0. It adds 40 tokens to every session and 712 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.
Other skills, from other repositories
agentcore-investigation
Investigate Bedrock AgentCore runtime sessions via CloudWatch Logs Insights — resolve session/trace IDs, query OTEL spans, filter noise, build timelines. Use when debugging AgentCore agent sessions, tracing tool calls, or analyzing latency.
amazon aurora dsql
Deprecated compatibility redirect for Aurora DSQL guidance. Use when a request concerns DSQL, Aurora DSQL, distributed SQL, DSQL schemas, migrations, queries, authentication, performance, or application development.
release
MUST READ before preparing a release commit or GitHub release -- the blocking GitHub preflight (dev/releasepreflight.py), project.save() versioning, changelog, README, template sync verification, fresh-install smoke, and the post-push GitHub release procedure (references/github-release.md).
specimen-authoring
Workflow and hard-won TD patterns for authoring Embody Specimens (the transparent TDXN gallery networks). Load before building or persisting a Specimen.
mcp-tools-reference
MUST READ before first MCP tool call in a session. Complete Envoy tool catalog with parameters and usage.
td-api-reference
MUST READ before writing TD Python via executepython, setdatcontent, or editdatcontent, and before any heavy build. Parameters, storage, operators, referencing, threading, cook model, heavy-build safety caps.