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.

projectbluefin/dakota

subagent-driven-development

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

planetscale/database-skills

postgres

PostgreSQL best practices, query optimization, connection troubleshooting, and performance improvement. Load when working with Postgres databases.

openai/skills

notion-knowledge-capture

Capture conversations and decisions into structured Notion pages; use when turning chats/notes into wiki entries, how-tos, decisions, or FAQs with proper linking.

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`.

projectbluefin/dakota

subagent-driven-development

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

planetscale/database-skills

postgres

PostgreSQL best practices, query optimization, connection troubleshooting, and performance improvement. Load when working with Postgres databases.

openai/skills

notion-knowledge-capture

Capture conversations and decisions into structured Notion pages; use when turning chats/notes into wiki entries, how-tos, decisions, or FAQs with proper linking.

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`.

Top performing skills & tiles

Discover more

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

tessl/pypi-pyrate-limiter

Python Rate-Limiter using Leaky-Bucket Algorithm for controlling request rates in applications with multiple backend storage options.

DOCS

tessl/pypi-ldap3

A strictly RFC 4510 conforming LDAP V3 pure Python client library

DOCS

tessl/pypi-jsons

A comprehensive Python library for serializing and deserializing Python objects to and from JSON (dictionaries) with minimal code changes required.

DOCS

tessl/pypi-asciimatics

A cross-platform package to replace curses (mouse/keyboard input & text colours/positioning) and create ASCII animations

DOCS

tessl/pypi-nodeenv

Node.js virtual environment builder for creating isolated Node.js environments

DOCS

tessl/pypi-mdutils

A comprehensive Python library for programmatically creating and manipulating Markdown files with support for headers, tables, lists, images, links, and text formatting.

DOCS

tessl/pypi-gntp

Growl Notification Transport Protocol for Python

DOCS

tessl/pypi-airbyte-source-hubspot

Airbyte source connector for HubSpot that enables data synchronization from HubSpot's CRM and marketing platform to various destinations.

DOCS

tessl/pypi-titlecase

Python port of John Gruber's titlecase.pl for intelligent title case conversion with style guide compliance

DOCS

tessl/pypi-lunar-python

Comprehensive Chinese lunar calendar library with Solar calendar conversion and traditional Chinese calendar features.

DOCS

tessl/pypi-gensim

Python library for topic modelling, document indexing and similarity retrieval with large corpora

DOCS

tessl/pypi-pynmea2

Python library for parsing and generating NMEA 0183 protocol messages used in GPS and marine navigation systems

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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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