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

speech-to-text

Transcribe audio to text using ElevenLabs Scribe. Use when converting audio/video to text, generating subtitles, transcribing meetings, or processing spoken content.

a-pavithraa/springboot-skills-marketplace

java25-springboot4-reviewer

Comprehensive code review for Java 25 and Spring Boot 4 apps. Use when reviewing, checking, auditing, or analyzing Java/Spring Boot code (files, modules, PRs, or full codebases) for migration risks, Spring Boot 4 best practices, JSpecify null-safety, security vulnerabilities, performance bottlenecks, data access pitfalls, architecture boundaries (DDD/Hexagonal/Spring Modulith), or modern Java 25 usage.

hashicorp/agent-skills

run-acceptance-tests

Guide for running acceptance tests for a Terraform provider. Use this when asked to run an acceptance test or to run a test with the prefix `TestAcc`.

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

speech-to-text

Transcribe audio to text using ElevenLabs Scribe. Use when converting audio/video to text, generating subtitles, transcribing meetings, or processing spoken content.

a-pavithraa/springboot-skills-marketplace

java25-springboot4-reviewer

hashicorp/agent-skills

run-acceptance-tests

Guide for running acceptance tests for a Terraform provider. Use this when asked to run an acceptance test or to run a test with the prefix `TestAcc`.

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.

audit-context-building

Enables ultra-granular, line-by-line code analysis to build deep architectural context before vulnerability or bug finding.

SKILL

overnight-development

Automates software development overnight using Git hooks to enforce test-driven development (TDD). This skill activates when you request "overnight development", "autonomous coding", "work while I sleep", or mention TDD workflows and Git hooks. It leverages Git hooks to block commits until all tests pass, enforcing a rigorous TDD process and ensuring high-quality, production-ready code. Perfect for building features autonomously - just define the goal and let Claude work overnight while tests enforce quality.

SKILL

rust-engineer

Use when building Rust applications requiring memory safety, systems programming, or zero-cost abstractions. Invoke for ownership patterns, lifetimes, traits, async/await with tokio.

SKILL

atlassian-mcp

Use when querying Jira issues, searching Confluence pages, creating tickets, updating documentation, or integrating Atlassian tools via MCP protocol.

SKILL

tessl/pypi-pycuda

Python wrapper for Nvidia CUDA parallel computation API with object cleanup, automatic error checking, and convenient abstractions.

DOCS

tessl/npm-cli

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

DOCS

containerize-aspnetcore

Containerize an ASP.NET Core project by creating Dockerfile and .dockerfile files customized for the project.

SKILL

audit

Perform comprehensive audit of interface quality across accessibility, performance, theming, and responsive design. Generates detailed report of issues with severity ratings and recommendations.

SKILL

audit

Perform comprehensive audit of interface quality across accessibility, performance, theming, and responsive design. Generates detailed report of issues with severity ratings and recommendations.

SKILL

recipe-send-personalized-emails

Read recipient data from Google Sheets and send personalized Gmail messages to each row.

SKILL

gws-docs

Read and write Google Docs.

SKILL

gws-modelarmor-create-template

Google Model Armor: Create a new Model Armor template.

SKILL

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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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