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-editor/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-editor)<a href="https://agentmods.dev/skills/stacklok/toolhive-studio/skill-editor"><img src="https://agentmods.dev/badge/skills/stacklok/toolhive-studio/skill-editor/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-editor"><img src="https://agentmods.dev/badge/skills/stacklok/toolhive-studio/skill-editor.svg" alt="Reviewed on agentmods" width="80" 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 5.1 | $0.00040 | $0.00445 |
| Opus 5.5 | $0.00016 | $0.00178 |
| Sonnet 5.5 | $0.00008 | $0.00089 |
| Haiku 4.5 | $0.00004 | $0.00044 |
Grade D, and why
skill-editor scanned grade D with 2 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.
Enumerates other installed skillsmediumAgent snooping
Other skills' SKILL.md files reveal prompts, capabilities and secrets that should be invisible to peers.
ls -la .claude/skills/ Recursive force deletehighDestructive command
rm -rf with a variable or a broad path is one typo away from removing the wrong tree.
rm -rf .claude/skills/<name> .codex/skills/<name> .cursor/skills/<name> What it actually says
Skill Editor
Edit existing AI agent skills while keeping Claude, Codex, and Cursor in sync.
Workflow
- Always edit Claude first -
.claude/skills/<name>/SKILL.mdis the canonical source - Replicate with CLI - Copy changes to
.codex/skills/and.cursor/skills/ - Never edit Codex/Cursor directly - They are copies of Claude's version
Finding Existing Skills
List all skills:
ls -la .claude/skills/
Read a skill:
cat .claude/skills/<name>/SKILL.md
Editing a Skill
- Read the current skill content from
.claude/skills/<name>/SKILL.md - Make the requested changes
- Replicate to other agents:
cp .claude/skills/<name>/SKILL.md .codex/skills/<name>/ cp .claude/skills/<name>/SKILL.md .cursor/skills/<name>/
Verification
Always verify sync after editing:
diff .claude/skills/<name>/SKILL.md .codex/skills/<name>/SKILL.md
diff .claude/skills/<name>/SKILL.md .cursor/skills/<name>/SKILL.md
No output means files are identical.
Common Edits
- Update description - Improve auto-discovery keywords
- Add instructions - Expand the skill's capabilities
- Fix errors - Correct mistakes in the skill logic
- Add references - Create
references/directory for supporting docs
Deleting a Skill
Remove from all three locations:
rm -rf .claude/skills/<name> .codex/skills/<name> .cursor/skills/<name>
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 · 65 lines · 40 tokens per session scan D 7b1d17e048e4
skill-editor 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 445 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it D with 2 findings (enumerates other installed skills, recursive force delete). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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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.