The package manager for agent skills and context

Versioned, evaluated skills and context for agentic software development

npx tessl search

Evaluate skill

Featured skills

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

96%

planetscale/database-skills

postgres

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

94%

planetscale/database-skills

mysql

Plan and review MySQL/InnoDB schema, indexing, query tuning, transactions, and operations. Use when creating or modifying MySQL tables, indexes, or queries; diagnosing slow/locking behavior; planning migrations; or troubleshooting replication and connection issues. Load when using a MySQL database.

100%

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`.

100%

elevenlabs/skills

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.

96%

planetscale/database-skills

postgres

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

94%

planetscale/database-skills

mysql

100%

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`.

100%

elevenlabs/skills

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.

Top performing skills & tiles

Discover more

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

88%

↑ 1.37x

tessl/pypi-python-levenshtein

Python compatibility wrapper for computing string edit distances and similarities using fast Levenshtein algorithms.

DOCS

88%

↓ 0.98x

tessl/pypi-comtypes

Pure Python COM package for Windows COM automation and interoperability

DOCS

88%

↑ 1.10x

tessl/pypi-fiona

Fiona reads and writes spatial data files

DOCS

87%

↓ 0.94x

tessl/pypi-spreg

Spatial econometric regression models for analyzing geographically-related data interactions.

DOCS

87%

↓ 0.98x

tessl/pypi-scikit-learn

A comprehensive machine learning library providing supervised and unsupervised learning algorithms with consistent APIs and extensive tools for data preprocessing, model evaluation, and deployment.

DOCS

—

tessl/pypi-cupy-cuda101

CuPy: NumPy & SciPy for GPU (CUDA 10.1 version)

DOCS

87%

↑ 1.02x

tessl/pypi-aiortc

Python implementation of WebRTC and ORTC for real-time peer-to-peer communication

DOCS

86%

↑ 1.28x

tessl/pypi-pyopencl

Python wrapper for OpenCL enabling GPU and parallel computing with comprehensive array operations and mathematical functions

DOCS

86%

↑ 1.03x

tessl/pypi-pylibmc

Quick and small memcached client for Python

DOCS

86%

↑ 1.08x

tessl/pypi-ipython

IPython: Productive Interactive Computing - An advanced interactive computing environment and command shell for Python.

DOCS

86%

↓ 0.98x

tessl/pypi-dicttoxml

Converts a Python dictionary or other native data type into a valid XML string.

DOCS

86%

↑ 1.24x

tessl/pypi-crosshair-tool

Analyze Python code for correctness using symbolic execution and SMT solving to automatically find counterexamples for functions with type annotations and contracts.

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.

Browse by category

View all categories

Find exactly what you need, organized by use case.

Testing & QA

Security & compliance

Documentation generation

Debugging & error handling

API development

Web design

Database management

From our partners

Become a partner

Enterprise-ready skills from trusted publishers.

90%

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

93%

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

84%

↑ 1.78x

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

86%

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

88%

↑ 1.27x

pubnub/pubnub-app-developer

Build real-time applications with PubNub pub/sub messaging

SKILLS

93%

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

69%

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