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Get your harness off the desktop
Start locally, then deploy a fleet of agents on Kubernetes with your choice of cloud and model provider.
The open cloud-native harness for developers who are building platforms
We blew up the harness and then put it back together: more secure, more scalable, more extensible.
Built from the ground up to run in the cloud. Get your harness off your laptop and run fleets of agents anywhere.
What can you do with Mecatl?
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Separate the agent loop from the sandbox
Separate control from execution to keep bad code outside your trust boundary.
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Pick and choose what you need
Use Mecatl's library of components to assemble a custom harness.
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Control what your agents can do
Set permissions and choose which tool calls require your approval.
Mecatl (MEH-kah-tl) is hard to say, but easy to use.
What you don't have to build
Mecatl gives you the hard parts. Use what you need.
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Complete agent loop
Multi-turn reasoning, tool dispatch, compaction, permission gating, and event streaming are built in.
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Port model
Modular design. Swap LLM backends, persistence, distributed locks, or permission logic without touching the engine. Reference adapters included for every port.
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Cloud-native by design
Disposable process, externalized state, durable event record. mecak8s pre-wires Redis and Kubernetes leases so you can scale stateless pods from day one.
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Importable engine
github.com/stacklok/mecatl/engine is its own Go module with a tiny dependency closure. Embed the loop directly, no server required.
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Full observability
OpenTelemetry traces, LLM resilience decorator, slow-turn ring buffer, and an MCP-accessible perf server.
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Identity at the core
Every agent acts under a verifiable identity. Mecatl stamps identity at every agent action, not just at the login gate.
Four deployment options to get you started
Local or remoteRun locally with
mecatui, or connect to mecated over gRPC or HTTP/SSE.Cloud-nativemecak8s: stateless pods, Redis-backed state, and multi-replica coordination.CIUse mecatequi to turn one prompt into a patch and a pass/fail result for your pipeline.EmbedImport the engine directly into your Go project.Mecatl is part of Stacklok's commitment to building a more open alternative to vertically integrated agent stacks.
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