Agentic Harnesses
Capability is commodity.Engineering is the work.
Every organisation has tried AI. Most have a licence. Some have built a prototype. And almost all — quietly, behind the success stories — have hit the same wall: outputs drift, agents wander, regulated workflows can't be audited. The pilot worked. The rollout is stuck.
This isn't a model problem. It's a harness problem.
Definition
A harness is the engineering between the model and the business.
It is not a model. It is not a prompt. It is not a chatbot. It is the operating system for your agentic workforce — and it is where the real engineering lives.
Context assembly
What the AI sees. Which documents, records, policies, prior decisions — and in what order.
Tool surface
The exact set of actions the AI is allowed to take, and the guards around each one.
Workflow orchestration
How agents hand work to each other, and where a human must sign off.
Evaluation & observability
How you know it worked, what it cost, and how to prove it afterwards.
Guardrails & policy
Domain rules, regulatory constraints, refusal logic — baked into the runtime, not the prompt.
Memory & state
What the system remembers between turns, between sessions, between users.
The inversion
AI-first. Human-in-the-Loop.
Most organisations do it backwards. They take a human process and sprinkle AI into the gaps. The result is AI that assists humans who are already overloaded — a modest productivity gain, wrapped in governance theatre. We design the other way around.
Human-first, AI-assisted
- —Human drives every step
- —AI suggests; human re-does the work
- —Approval is implicit, invisible
- —Productivity ceiling: your headcount
AI-first, Human-in-the-Loop
- →Harness owns the workflow
- →Human inserted at decision points
- →Every approval captured and signed
- →Throughput ceiling: reviewer judgement
Done well, one reviewer supervises the throughput of a team. Done badly, you have an expensive autocomplete. The harness is what makes the difference.
Engagement
Four phases. One workflow at a time.
Domain discovery
We sit with the people doing the work. Map the workflow, the decisions, the evidence each step produces, the regulations it must satisfy. Identify where AI-first is safe, where Human-in-the-Loop is mandatory, and where AI should never go.
Output
Harness blueprint — workflows, tool surface, escalation policy, evaluation criteria, risk register.
Harness build
Implement in Rust. Build the tools, the guardrails, the observability, the human-approval surfaces, and the evaluation suite. Model-agnostic via our GAISE abstraction — never locked to a single vendor.
Output
A working harness deployed to your environment, with a measurable baseline.
Supervised rollout
Run the harness alongside your existing process. Humans review every output. The harness learns from every correction. Tune thresholds, expand autonomy where the evidence supports it, contract it where it doesn't.
Output
A production-grade agentic workflow with auditable performance data and a defensible governance story.
Ownership transfer
Train your team, hand over the code, stay on for as much or as little ongoing work as you want. The harness is yours. The IP is yours. The moat is yours.
Output
Full ownership — no retainer, no lock-in, no rent.
Applications
Where harnesses earn their keep.
Pharmaceutical
Literature review, pharmacovigilance triage, regulatory submission drafting, clinical protocol authoring. Every output carries its evidence chain; every human sign-off is a signed, timestamped decision.
Healthcare
Referral triage, discharge summary generation, coding assistance, prior-authorisation drafting. The clinician remains the decision-maker; the harness removes the hours of preparation around the decision.
Military & Intelligence
Source synthesis, OSINT collation, briefing preparation, red-team adversary simulation. Airgapped deployment, strict tool-surface control, full provenance.
Financial Services
KYC narrative generation, credit memo drafting, regulatory reporting, suspicious-activity triage. Deterministic where the regulator demands; probabilistic where it adds value; auditable throughout.
Conveyancing
Title review, search analysis, enquiry drafting, client-correspondence preparation. The solicitor signs. The harness does the ninety minutes of work that used to sit underneath the signature.
Your industry
If your organisation has a regulated workflow with evidence, approval chains, and a cost-of-failure measured in more than pounds — the pattern applies.
One-paragraph version
The promise of agentic AI is a workforce of tireless digital colleagues doing the work your people don't have time for. The reality, in most organisations, is a demo that never became a deployment. The missing piece is the harness — the domain-specific engineering that turns a general-purpose model into a governed, auditable, accountable member of your team.