Skills Registry
Find skills that make
AI agents work correctly.
Skills are instructions that tell AI coding agents how to use your library, API, or workflow correctly. Evaluated, secured, versioned, and discoverable.
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Have a skill? Optimize it with Tessl →
Featured skills
View more93
Agent success vs baseline
92%
Does it follow best practices?
Impact
93%
1.14xAverage score across 8 eval scenarios
Advisory
Suggest reviewing before use
Reviewed:
Version: b156f4c
planetscale/database-skills
mysql
Plan and review MySQL/InnoDB schema, indexing, query tuning, transactions, and operations. Use when creating or modifying MySQL tables, indexes, or queries; diagnosing slow/locking behavior; planning migrations; or troubleshooting replication and connection issues. Load when using a MySQL database.
93
Agent success vs baseline
93%
Does it follow best practices?
Impact
93%
1.30xAverage score across 6 eval scenarios
Advisory
Suggest reviewing before use
Reviewed:
Version: 99a61b2
huggingface/skills
hugging-face-cli
Execute Hugging Face Hub operations using the `hf` CLI. Use when the user needs to download models/datasets/spaces, upload files to Hub repositories, create repos, manage local cache, or run compute jobs on HF infrastructure. Covers authentication, file transfers, repository creation, cache operations, and cloud compute.
81
76%
Does it follow best practices?
Impact
Pending
Average score across 0 eval scenarios
Passed
No known issues
Reviewed:
Version: 3d59511
anthropics/skills
webapp-testing
Toolkit for interacting with and testing local web applications using Playwright. Supports verifying frontend functionality, debugging UI behavior, capturing browser screenshots, and viewing browser logs.
76
70%
Does it follow best practices?
Impact
Pending
Average score across 0 eval scenarios
Passed
No known issues
Reviewed:
Version: b156f4c
planetscale/database-skills
postgres
PostgreSQL best practices, query optimization, connection troubleshooting, and performance improvement. Load when working with Postgres databases.
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WHY TESSL?
Your skill gets optimized,
not just listed.
Everything you just saw — scores, uplift numbers, partner skills — that's what your skill gets when you optimize it with Tessl. A GitHub README tells developers it exists. Tessl tells them it works.
Quality
How well your skill is constructed against best practices. Runs on every publish, before anyone sees your skill.
Impact
The measurable change in agent behaviour attributable to your skill. Proof, not claims.
Security
Automated vulnerability scanning powered by Snyk. Developers see exactly what was found.
Versioned
Every publish is versioned. Developers pin, update, and find your skill like a package.
Browse by category
View all categoriesFind exactly what you need, organized by use case.
Testing & QA
Skills for writing, running, and debugging tests across unit, integration, and E2E.
Security & Compliance
Harden code, audit dependencies, and enforce policy across your stack.
Documentation Generation
Auto-generate READMEs, API docs, changelogs, and inline comments.
Debugging & Error Handling
Diagnose failures, trace errors, and write resilient error-handling patterns.
API Development
Design, build, and document REST and GraphQL APIs with consistent patterns.
Web Design
UI components, layouts, and design-to-code workflows for the web.
Database Management
Schema design, query optimisation, and migration patterns.
Infrastructure
IaC, cloud provisioning, and deployment pipeline skills for managing infrastructure.
Machine Learning & AI
Model integration, prompt engineering, and data pipeline patterns.
DevOps
CI/CD, containerisation, monitoring, and incident response workflows.
Optimize your context
Make your skill work
correctly, provably.
Submit your skill and Tessl runs evals automatically. You get a score, actionable improvements, and a page in the registry. Developers and their agents start finding you immediately.
01
Submit your skill
Point Tessl at your GitHub repo or paste your skill content directly.
02
Get your score
Evals run automatically. You see exactly where your skill works, where it doesn't, and what to fix.
03
Improve and republish
Act on the suggestions, push an update, and watch your score move. Every version is tracked.