Knackbox is an open library of Agent Skills (SKILL.md folders) for Claude Code, Codex, Cursor, OpenCode, and any runtime that loads the Agent Skills format. Skills are ranked by review, benchmark coverage, and measured quality — not install counts.

What are Agent Skills?

Agent Skills are portable folders with a SKILL.md file of YAML frontmatter plus instructions. Compatible agents load a skill when the description matches the user's task — commits, reviews, SQL, incidents, writing, and more.

How is Knackbox different from skills.sh?

skills.sh is a discovery directory ranked by popularity. Knackbox is a curated quality layer on the same open format: every skill ships a benchmark suite, a content digest, declared permissions, and honest empty scores until measured.

How do I install a skill for Claude Code?

Run npx knackbox add . The default destination is ~/.claude/skills. You can also use npx skills add shinzoxD/knackbox --skill or the curl installer in the docs.

Do these skills work with Cursor, Codex, and OpenCode?

Yes. Pass --agent cursor, --agent codex, or --agent opencode to the Knackbox CLI, or let the open Skills CLI detect installed agents. Any runtime that reads SKILL.md can load the folders as-is.

Are Knackbox skills free?

Yes. The catalog is Apache-2.0. You can install, fork, and contribute skills under the same license with DCO sign-off.

How are skills ranked?

Tiers are core, verified, and community. Measured columns include trigger accuracy, quality uplift, context cost, and a composite score. Unmeasured fields stay visibly empty instead of being estimated.

How do I contribute a new Agent Skill?

Scaffold with python scripts/new_skill.py, replace every TODO, add at least five trigger and five near-miss prompts, run python scripts/validate.py, and open a pull request. See the contribute page and CONTRIBUTING.md.

catalog v0 / 127 skills across 6 categories / quality-first

Agent skills ranked by evidence, not installs.

Popularity boards answer what people downloaded. Knackbox answers what is reviewed, suite-covered, and measurable— plain-file Agent Skills for Claude Code, Codex, Cursor, and OpenCode, with digests and honest scores.

Start with a job Quality leaderboard Starter packs View source

Install / bash

npx knackbox add commit-messages

Knackbox CLI installs into ~/.claude/skills by default. Pass --agent cursor (or codex / opencode) for other roots. See installation docs for the ecosystem Skills CLI and curl fallback.

Skills: 127
Categories: 6
Core: 3
Verified: 1
Community: 123

Curated set

Core skills

Maintainer-curated skills surfaced first in the catalog.

Tier methodology

code-reviewCore
Review code changes for bugs, security issues, and maintainability with severity-tagged, actionable findings. Use whenever the user shares a diff, pull request, or code snippet and asks for review, feedback, "does this look right", "find issues", or "check my code" — even for small snippets or partial files.
Category
coding
Context
572
Updated
2026-07-11
commit-messagesCore
Write clear, conventional git commit messages from diffs or descriptions of changes. Use whenever the user asks for a commit message, is about to commit changes, mentions "git commit", shares a diff or staged changes that need summarizing, or finishes a coding task that will be committed — even if they don't ask about message formatting.
Category
coding
Context
496
Updated
2026-07-11
meeting-notesCore
Turn raw meeting transcripts, chat logs, or rough notes into clean, structured meeting notes with decisions and action items. Use whenever the user shares a transcript or messy notes, asks for meeting minutes, wants action items extracted, or says things like "clean up my notes from the standup" — even if they don't say the word "minutes".
Category
documents
Context
536
Updated
2026-07-11

Catalog generated 2026-08-25. Scores follow version v0. Unmeasured metrics stay — until the benchmark harness runs.

Start here

I want to…

Developers do not browse 120 skills. They have a job. Each card is a short install set.

All job guides · npx knackbox for "review a PR"

Browse by category

Agent skill categories

Coding, data, documents, productivity, research, and writing — each skill is a portable folder with triggers, instructions, and a benchmark suite.

Questions

Agent Skills FAQ

Short answers for people comparing Knackbox to a popularity board, or installing their firstSKILL.md.

What is Knackbox?: Knackbox is an open library of Agent Skills (SKILL.md folders) for Claude Code, Codex, Cursor, OpenCode, and any runtime that loads the Agent Skills format. Skills are ranked by review, benchmark coverage, and measured quality — not install counts.
What are Agent Skills?: Agent Skills are portable folders with a SKILL.md file of YAML frontmatter plus instructions. Compatible agents load a skill when the description matches the user's task — commits, reviews, SQL, incidents, writing, and more.
How is Knackbox different from skills.sh?: skills.sh is a discovery directory ranked by popularity. Knackbox is a curated quality layer on the same open format: every skill ships a benchmark suite, a content digest, declared permissions, and honest empty scores until measured.
How do I install a skill for Claude Code?: Run npx knackbox add <skill-name>. The default destination is ~/.claude/skills. You can also use npx skills add shinzoxD/knackbox --skill <name> or the curl installer in the docs.
Do these skills work with Cursor, Codex, and OpenCode?: Yes. Pass --agent cursor, --agent codex, or --agent opencode to the Knackbox CLI, or let the open Skills CLI detect installed agents. Any runtime that reads SKILL.md can load the folders as-is.
Are Knackbox skills free?: Yes. The catalog is Apache-2.0. You can install, fork, and contribute skills under the same license with DCO sign-off.
How are skills ranked?: Tiers are core, verified, and community. Measured columns include trigger accuracy, quality uplift, context cost, and a composite score. Unmeasured fields stay visibly empty instead of being estimated.
How do I contribute a new Agent Skill?: Scaffold with python scripts/new_skill.py, replace every TODO, add at least five trigger and five near-miss prompts, run python scripts/validate.py, and open a pull request. See the contribute page and CONTRIBUTING.md.

Full FAQ · Install docs · Why not skills.sh