The package manager for agent skills and context
Versioned, evaluated skills and context for agentic software development.
npx tessl search
Used by agentic developers at
Context can drive up to 3.3X improvement in agents use of over 300 libraries
How good is your skill? Put it to the test
Evaluate any skill against structured best practices for descriptions and content.
EVALUATE YOUR SKILLMake agents successful in your environment
Agents don’t know how to develop in your organization, they need to be onboarded. Turn your APIs, libraries, and conventions into agent-usable skills, docs and rules, so agents stop guessing and start behaving like experienced team members.
- Version-matched OSS and internal APIs
- Correct imports, calls, and constraints
- Fewer retries and review cycles
Evaluate what works in real-world scenarios
Not all context is equal, and mistakes can mislead agents or overwhelm context windows. Evaluate and optimize your skills by running agents through real world scenarios, and testing changes to avoid regressions over time.
- Repeatable task evaluations
- Regression detection as skills, agents and models evolve
- Learn if your context helps or hurts agent performance
Create skills once. Use them across all agents and models
Tessl gives you a single source of truth for skills and context, reusable across agents, models, and development environments without duplication or drift.
- Avoid lock-in with universally compatible context
- Consistent behavior across agents
- Collaborate on context with your team and agents
Keep your agent on the rails with better context. Discover thousands of evaluated skills in the Tessl Registry.
Don’t take our word for it
Latest Articles
Explore our guides and resources to understand key concepts relating to Al agents.
Context-Aware Development in Kiro: From Hallucination to Production
Explore how Model Context Protocol servers and agent steering enhance AI coding tools by providing context, reducing errors, and improving code reliability in Kiro.
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Stop prompt hacking
We've moved past prompt hacks. It's time to invest in durable context systems.
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Cursor turns its internal security agents into reusable templates
Cursor offers reusable templates for security agents, enabling continuous codebase scanning and automatic vulnerability fixes, enhancing software security review processes.
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With Small 4, Mistral combines three of its flagship AI models into one
Mistral combines its AI models into a hybrid system with Small 4, integrating reasoning, image processing, and coding capabilities into a single model for developers.
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The Tessl Registry now has security scores, powered by Snyk
The Tessl Registry now includes Snyk-powered security scores for skills, enhancing decision-making by assessing quality, impact, and safety before installation.
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Replit’s Agent 4 coordinates multiple AI agents to build apps in parallel
Replit’s Agent 4 coordinates multiple AI agents to execute app-building tasks in parallel, enhancing project management and oversight in complex software development.
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curl -fsSL https://get.tessl.io | shOr explore skills and context in the Registry.
