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.

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.

anthropics/skills

pdf

Use this skill whenever the user wants to do anything with PDF files. This includes reading or extracting text/tables from PDFs, combining or merging multiple PDFs into one, splitting PDFs apart, rotating pages, adding watermarks, creating new PDFs, filling PDF forms, encrypting/decrypting PDFs, extracting images, and OCR on scanned PDFs to make them searchable. If the user mentions a .pdf file or asks to produce one, use this skill.

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.

projectbluefin/dakota

subagent-driven-development

Use when executing implementation plans with independent tasks in the current session

anthropics/skills

webapp-testing

anthropics/skills

pdf

elevenlabs/skills

setup-api-key

projectbluefin/dakota

subagent-driven-development

Use when executing implementation plans with independent tasks in the current session

Top performing skills & tiles

Discover more

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

tessl/npm-gatsby-plugin-sharp

Wrapper of the Sharp image manipulation library for Gatsby plugins

DOCS

tessl/npm-superset-ui--plugin-chart-echarts

Comprehensive ECharts plugin suite for Apache Superset providing 15+ chart types including timeseries, pie, bar, scatter, radar, and more with advanced analytics features.

DOCS

tessl/npm-fluidframework--container-loader

Fluid container loader providing core container loading functionality for the Fluid Framework

DOCS

tessl/npm-primevue--core

Core utilities and base functionality for PrimeVue UI component library

DOCS

tessl/npm-semantic-release--release-notes-generator

Semantic-release plugin to generate changelog content with conventional-changelog

DOCS

tessl/npm-jsx-ast-utils

AST utility module for statically analyzing JSX

DOCS

tessl/npm-tailwindcss--node

Node.js-specific utilities and runtime functionality for Tailwind CSS v4, providing compilation tools, module dependency analysis, source map handling, path normalization, and optimization utilities.

DOCS

tessl/npm-jupyterlab--ui-components

JupyterLab React-based UI components library providing icons, forms, buttons, and widgets for consistent interface development.

DOCS

tessl/npm-remirror--react

Hooks and components for consuming remirror with your fave framework React.

DOCS

tessl/npm-eslint-plugin-standard

ESLint plugin providing custom rules for JavaScript Standard Style linting

DOCS

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Pending

tessl/npm-noble--hashes

Audited & minimal 0-dependency JS implementation of SHA, RIPEMD, BLAKE, HMAC, HKDF, PBKDF & Scrypt

DOCS

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Pending

tessl/npm-react-leaflet

React components for Leaflet maps

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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webapp-testing

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