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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.

planetscale/database-skills

vitess

Vitess best practices, query optimization, and connection troubleshooting for PlanetScale Vitess databases. Load when working with Vitess databases, sharding, VSchema configuration, keyspace management, or MySQL scaling issues.

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`.

a-pavithraa/springboot-skills-marketplace

springboot-migration

Migrate Spring Boot projects to version 4.0 with Java 25, including Spring Modulith 2.0 and Testcontainers 2.x upgrades. Use when user requests upgrading Spring Boot, migrating to Java 25, updating dependencies to Spring Boot 4, mentions Jackson 3 migration, asks about starter renames (web→webmvc, aop→aspectj), fixing test annotations (@MockBean→@MockitoBean), or needs help with Spring Modulith 2.0 or Testcontainers 2.x compatibility. Analyzes codebase for migration issues and guides through changes with specific file references.

projectbluefin/dakota

subagent-driven-development

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

planetscale/database-skills

vitess

Vitess best practices, query optimization, and connection troubleshooting for PlanetScale Vitess databases. Load when working with Vitess databases, sharding, VSchema configuration, keyspace management, or MySQL scaling issues.

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`.

a-pavithraa/springboot-skills-marketplace

springboot-migration

Migrate Spring Boot projects to version 4.0 with Java 25, including Spring Modulith 2.0 and Testcontainers 2.x upgrades. Use when user requests upgrading Spring Boot, migrating to Java 25, updating dependencies to Spring Boot 4, mentions Jackson 3 migration, asks about starter renames (web→webmvc, aop→aspectj), fixing test annotations (@MockBean→@MockitoBean), or needs help with Spring Modulith 2.0 or Testcontainers 2.x compatibility. Analyzes codebase for migration issues and guides through changes with specific file references.

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.

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Pending

tessl/maven-org-apache-spark--spark-sql-2-12

Apache Spark's distributed SQL engine and structured data processing framework for manipulating structured data using SQL queries and DataFrame/Dataset APIs

DOCS

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Pending

tessl/maven-org-apache-spark--spark-sql-2-11

Spark SQL module for Apache Spark providing structured data processing with SQL and DataFrame APIs

DOCS

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Pending

tessl/maven-org-apache-spark--spark-sql-kafka-0-10-2-13

Kafka 0.10+ Source for Structured Streaming

DOCS

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Pending

tessl/maven-org-apache-spark--spark-sql-kafka-0-10-2-11

Apache Spark Structured Streaming integration with Apache Kafka providing comprehensive data source and sink capabilities for both batch and streaming workloads.

DOCS

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Pending

tessl/maven-org-apache-spark--spark-sql-api-2-12

Spark SQL API module providing core SQL data types, rows, and foundational APIs for Spark SQL operations

DOCS

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Pending

tessl/maven-org-apache-spark--spark-repl-2-12

Interactive Scala shell (REPL) component for Apache Spark providing real-time data processing capabilities and exploratory data analysis

DOCS

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Pending

tessl/maven-org-apache-spark--spark-protobuf-2-13

Apache Spark connector for Protocol Buffers data source enabling seamless protobuf serialization and deserialization in Spark SQL.

DOCS

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Pending

tessl/maven-org-apache-spark--spark-network-yarn-2-13

Apache Spark YARN Shuffle Service - provides shuffle service functionality for YARN-managed clusters

DOCS

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Pending

tessl/maven-org-apache-spark--spark-network-shuffle-2-10

External shuffle service client for Apache Spark that enables reading shuffle blocks from external servers instead of executors

DOCS

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Pending

tessl/maven-org-apache-spark--spark-mllib-2-12

Apache Spark MLlib is a scalable machine learning library that provides high-level APIs for common machine learning algorithms and utilities

DOCS

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Pending

tessl/maven-org-apache-spark--spark-mesos-2-11

Apache Spark Mesos resource manager that enables Spark applications to run on Apache Mesos clusters with both coarse-grained and fine-grained scheduling modes

DOCS

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Pending

tessl/maven-org-apache-spark--spark-launcher-2-11

Library for launching Spark applications programmatically with monitoring and control capabilities.

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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From our partners

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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