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PATHSUMExplore PathLAB

PathLAB Studio · Local-first intelligent automations

Put AI to work.
On your terms.

Build AI workflows you can put into operation and stand behind. PathLAB Studio connects compiled runtimes, tamper-evident Pathproof records and controlled experiments in one local-first workbench.

Explore the free experienceInspect a receipt

Free includes the open-source runtime, Pathproof and limited PathLAB access.

The Pathsum principle01 / Control
Confidence = ƒ(Control)

Control =Pathsum

  1. Flight PlansCompile-time budget envelopes
  2. Sealed ToolsStrict runtime allowances
  3. Human GatesApproval before irreversible effects
  4. PathproofCryptographic ledger receipts
Outside the declared path? Stop.

Define the path. Record the run. Improve with evidence.

Write → Run → Review → ImproveSee confidence take shape

For builders responsible for the result

A good answer is only part of the job.

When an AI workflow sends a quote, spends money or changes a business record, you need to know how it reached that action. Pathsum connects the rules you defined to the execution you can inspect, so you can decide what is ready to run and what needs more work.

  1. Before the actionKnow what's allowed.
  2. After the runKnow what happened.
  3. Before the next versionKnow why it's better.
A single pale flower photographed against near-black, lit so that the structure of its petals and stamen is visible.

Confidence takes shape

Define the path. Keep the evidence.

The runtime carries your declared controls into execution. Pathproof records what happens along the way. PathLAB Studio connects both to the work of writing, running, reviewing and improving a workflow.

01 / Write

Compile your controls before execution.

Define the workflow's actions, routes, tools, checks and budgets in a Flight Plan. Pathsum compiles those choices into the runtime, making the declared boundaries part of how the workflow executes.

PathLAB / writeIllustrative view

HVAC quote / Flight Plan

WORKFLOW Prepare a customer quote

TOOLS Read catalogue · Draft quote · Send quote

CHECKS Pricing · Required details

GATE Human approval before send

BUDGETS Tokens · Cost · Wall time

The permitted pathCompiled before the run

Flight Plans put token, cost and time allowances into the compiled workflow.

02 / Run

Keep each action within its declared authority.

Sealed Tools restrict what each step can call while the runtime applies your checks and budgets. Human Gates pause execution before a declared consequential action, so the decision stays with you.

PathLAB / runIllustrative view

Declared tool access for the quoting workflow

Parts catalogue
Read
Quote authoring
Draft
Send quote
Human approval
Checks at the boundaryEvents enter Pathproof

Human Gates

It waits for your decision.

Review the proposed quote before it is sent. Your approval or rejection becomes part of the Pathproof record.

Sealed Tools define what a step can use. Human Gates decide when a consequential action may proceed.

03 / Review

Inspect the execution behind the result.

Pathproof records events throughout execution in a tamper-evident ledger. Follow the route, inspect tool results and review checks and human decisions, with cryptographic receipts you can verify independently.

PathLAB / reviewRecorded example

Recorded execution of the quoting workflow

Workflow
HVAC quote
Recorded events
19
Recorded outcome
Passed
Run identity
01M0J98NQD3P6PX45H0S3D95CN
Inspect this receipt

Each record connects the result to the compiled workflow that governed the run.

04 / Improve

Test changes against the criteria you set.

When a workflow sends a quote, spends money or changes a business record, “usually works” isn’t enough. Define what counts as success, test changes against it and inspect the failures—not just the average.

Choose the parameters, metrics, evaluations and stopping conditions. The ratchet runs candidate comparisons within those bounds and records which version was retained, which changes were rejected and why.

PathLAB / improveIllustrative view

The candidate can fall. The retained version need not.

Illustrative evaluation scores, not a product benchmark
TrialCandidateRetainedDecision
0418484Keep
0429191Keep
0438891Reject
0449191No change
0459494Keep
Explore the comparison

The runs and comparisons also become traceable material for evaluation and machine-learning datasets.

Confidence grows from the controls you can put to work.

Confidence = ƒ(Control)

Control =Pathsum

  1. Flight PlansCompile-time budget envelopes
  2. Sealed ToolsStrict runtime allowances
  3. Human GatesApproval before irreversible effects
  4. PathproofCryptographic ledger receipts

Confidence is a function of control. Control is the Pathsum of Flight Plans, Sealed Tools, Human Gates and Pathproof along the execution path.

Meet the workbench

Develop the workflow without rebuilding the tools around it.

Move from a Flight Plan to a recorded run, then compare the next version against the same evidence. PathLAB Studio connects authoring, execution, review and experiments so you can work through that process in one place.

See how PathLAB works

Fits the work you're already building

Control the next action without replacing your stack.

Call a compiled Pathsum workflow from your existing agent or Python code. Start with an action that needs defined controls and a verifiable record, then extend that approach across the workflow.

Write the workflow

Define the permitted actions and the checks that matter to your task.

Connect your stack

Bring the models, tools and data your workflow needs.

Keep the evidence

Inspect the resulting Pathproof independently of the workbench.

Choose your starting point

Start free and explore the workbench.

The Free plan includes the open-source runtime, Pathproof and limited working PathLAB access. Choose PathLAB Studio for the complete workbench or discuss enterprise licensing for your organisation.

FreeOpen-source runtime, Pathproof and limited PathLAB access.PathLAB StudioThe connected workbench for your complete workflow.Enterprise licensingProduct licensing for your organisation.

Independent services

Get help building a system for your business.

John works with local and small/medium businesses to identify the right problem, agree on the scope and deliver a verified AI workflow system.

Explore services

Before you start.

Who is PathLAB Studio for?
Builders responsible for consequential AI workflows: independent developers, technical founders, internal automation builders and enterprise practitioners. If you need to control what a workflow can do and explain what happened, this is the workbench.
Do I have to replace my existing agent stack?
You can start by handing a consequential action to a compiled Pathsum workflow. Keep the reasoning layer you use and put the execution boundary under control.
What comes with the Free plan?
The open-source runtime, Pathproof and limited working PathLAB access. Independent receipt verification stays free, including for someone receiving proof material from you.
How does improvement work?
You set the parameters, metrics, evaluations and stopping conditions. The ratchet can run candidate comparisons within those bounds, retaining the results and the reasons behind each decision. The same records provide traceable material for evaluation and machine-learning datasets.
Where does the workbench run?
PathLAB Studio is local-first. You author, inspect and retain your workflow records in your own working environment, with the models and integrations you choose.

PathLAB Studio

Build with control.
Work with confidence.

Explore the free experienceInspect a receipt

Free includes the open-source runtime, Pathproof and limited PathLAB access.