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Versioned, evaluated skills and context for agentic software development

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

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.

projectbluefin/dakota

subagent-driven-development

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

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.

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.

anthropics/skills

pdf

projectbluefin/dakota

subagent-driven-development

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

anthropics/skills

webapp-testing

huggingface/skills

hugging-face-cli

Top performing skills & tiles

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

tessl/npm-web3-eth

Web3 module to interact with the Ethereum blockchain and smart contracts.

DOCS

tessl/npm-parcel--plugin

Plugin API for Parcel bundler - provides base classes for creating Parcel plugins including transformers, resolvers, bundlers, namers, runtimes, packagers, optimizers, compressors, reporters, and validators

DOCS

tessl/npm-nock

HTTP server mocking and expectations library for Node.js testing environments

DOCS

tessl/npm-cpr

Cross-platform recursive file copying library that replicates Unix 'cp -R' command functionality

DOCS

tessl/npm-backstage--core-plugin-api

Core API used by Backstage plugins for analytics, configuration, routing, and cross-plugin communication

DOCS

tessl/npm-react-top-loading-bar

A highly customizable React top-loading bar component with hook-based, ref-based, and state-based control patterns.

DOCS

tessl/npm-lodash-isempty

Checks if values are empty including arrays, objects, strings, arguments objects, and jQuery-like collections.

DOCS

tessl/npm-czg

Interactive Commitizen CLI that generates standardized git commit messages

DOCS

tessl/npm-superset-ui--generator-superset

Yeoman generator that scaffolds Superset visualization plugins and packages with proper structure and boilerplate code

DOCS

tessl/npm-backstage--errors

Common utilities for error handling within Backstage with structured error classes and serialization functions

DOCS

tessl/npm-cli

A tool for rapidly building command line apps with argument parsing and stdin processing

DOCS

tessl/npm-babel-plugin-react-transform

Babel plugin to instrument React components with custom transforms

DOCS

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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