The package manager for agent skills and context

Versioned, evaluated skills and context for agentic software development

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Featured skills

Install our featured skills or any skill from GitHub with Tessl package manager.

elevenlabs/skills

setup-api-key

Sets up an ElevenLabs API key for use with ElevenLabs MCP tools. Use when the user needs to configure an ElevenLabs API key, when ElevenLabs tools fail due to missing API key, or when the user mentions needing access to ElevenLabs.

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.

planetscale/database-skills

vitess

Vitess best practices, query optimization, and connection troubleshooting for PlanetScale Vitess databases. Load when working with Vitess databases, sharding, VSchema configuration, keyspace management, or MySQL scaling issues.

openai/skills

linear

Manage issues, projects & team workflows in Linear. Use when the user wants to read, create or updates tickets in Linear.

elevenlabs/skills

setup-api-key

huggingface/skills

hugging-face-cli

planetscale/database-skills

vitess

openai/skills

linear

Manage issues, projects & team workflows in Linear. Use when the user wants to read, create or updates tickets in Linear.

Top performing skills & tiles

Discover more

Tessl analyzes skills and tiles for their impact on agent success.

tessl/npm-jest-circus

The next-gen flux-based test runner for Jest that provides test framework globals and event-driven test execution

DOCS

tessl/npm-isbot

Recognise bots/crawlers/spiders using the user agent string.

DOCS

tessl/npm-eslint-plugin-regexp

ESLint plugin for finding RegExp mistakes and RegExp style guide violations.

DOCS

tessl/npm-plotly-js-dist

JavaScript data visualization library for creating interactive charts, graphs, and scientific visualizations

DOCS

tessl/npm-grunt-env

Grunt plugin for specifying environment variable configurations in task chains

DOCS

tessl/npm-workbox-webpack-plugin

A plugin for your Webpack build process, helping you generate a manifest of local files that workbox-sw should precache.

DOCS

tessl/npm-sharp

High performance Node.js image processing library for resizing JPEG, PNG, WebP, GIF, AVIF and TIFF images

DOCS

tessl/npm-opentelemetry--instrumentation-express

OpenTelemetry instrumentation for Express.js web applications enabling automatic distributed tracing and observability

DOCS

tessl/npm-eslint-plugin-import-x

ESLint plugin providing comprehensive linting rules for ES2015+ import/export syntax with static analysis and module system enforcement.

DOCS

tessl/npm-babel--preset-stage-0

Deprecated Babel preset for stage 0 plugins that provides migration guidelines to explicit plugin configurations

DOCS

tessl/npm-types--react

TypeScript definitions for React, the popular JavaScript library for building user interfaces

DOCS

tessl/npm-ts-api-utils

Utility functions for working with TypeScript's API, providing comprehensive tools for analyzing and manipulating TypeScript AST nodes, types, and compiler APIs.

DOCS

Can't find what you're looking for? Evaluate a missing skill, or if you're looking for agent context for an open source dependency, request a tile.

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From our partners

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Enterprise-ready skills from trusted publishers.

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.

SKILL

text-to-speech

Convert text to speech using ElevenLabs voice AI. Use when generating audio from text, creating voiceovers, building voice apps, or synthesizing speech in 74+ languages.

SKILL

cisco/software-security

A software security skill that integrates with Project CodeGuard to help AI coding agents write secure code and prevent common vulnerabilities. Use this skill when writing, reviewing, or modifying code to ensure secure-by-default practices are followed.

SKILLS

terraform-stacks

Comprehensive guide for working with HashiCorp Terraform Stacks. Use when creating, modifying, or validating Terraform Stack configurations (.tfcomponent.hcl, .tfdeploy.hcl files), working with stack components and deployments from local modules, public registry, or private registry sources, managing multi-region or multi-environment infrastructure, or troubleshooting Terraform Stacks syntax and structure.

SKILL

pubnub/pubnub-app-developer

Build real-time applications with PubNub pub/sub messaging

SKILLS

skill-creator

Create new skills, modify and improve existing skills, and measure skill performance. Use when users want to create a skill from scratch, update or optimize an existing skill, run evals to test a skill, benchmark skill performance with variance analysis, or optimize a skill's description for better triggering accuracy.

SKILL

hugging-face-tool-builder

Use this skill when the user wants to build tool/scripts or achieve a task where using data from the Hugging Face API would help. This is especially useful when chaining or combining API calls or the task will be repeated/automated. This Skill creates a reusable script to fetch, enrich or process data.

SKILL