Tools & frameworks
Composable building blocks for agent workflows, explicit tool contracts, and coordination across tasks.
AGENTIC SOFTWARE ENGINEERING
Reliability
is engineered.
Models can make things up.
The systems around them shouldn’t.
We’re building tools, frameworks and infrastructure for coding agents that check their work.
Explore our approach
THE VERIFICATION WORKBENCHINTERACTIVE / 3D
Drag to rotate · click a stage
Evidence before action.
Check the proposed change against requirements and tests. Confidence alone is not a green light.
Built around evidence. Designed for control.Scroll to discover
THE PRINCIPLE
Intelligence is a capability.
Reliability is a discipline.
A capable model is only the beginning. Useful agents need context, clear boundaries, and a way to know when their work is actually right. That’s the engineering we care about.
01 / OUR APPROACH
From a plausible answer
to an accountable action.
Close the loop.
Give agents room to act.
Give engineers the means to verify.
ILLUSTRATIVE WORKFLOW
Repository
Context check
Next action
repository.contextevidence attached
Start with what’s real.
Repository state, requirements, and tool results should inform the next action. A convincing answer is no substitute for current evidence.
02 / WHAT WE’RE BUILDING TOWARD
The infrastructure
behind the agent.
Not another layer of conversation. The foundations that make autonomous software work inspectable, testable, and recoverable.
Execution infrastructure
Bounded environments, deliberate permissions, and recovery paths for agents operating on real software.
Verification & evaluation
Checks, execution traces, and repeatable evaluations that help engineers see what happened and why.
THE NAME IS A POSITION.
!Hallu
A little skepticism.
A lot of engineering.
In code, ! means NOT. For us, it’s a reminder to
question the output, inspect the evidence, and build the checks.
Models will make mistakes. Better systems make those mistakes visible—and give us a way forward.
Build with that mindsetLET’S MAKE IT WORK.
Working on a hard
agent problem?
tony@hallu.website
Tools, infrastructure, or a good engineering question.
We’d like
to hear what you’re thinking.