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About Stacklane

AI-native engineering, with evidence at every step.

We design AI agents and software as complete systems. Coding agents help us implement and test; engineers maintain the architecture, review changes, and validate behavior before release.

Inspect our engineering process

Engineering operating model

One engineering thread, from brief to release.

Each decision becomes an artifact the next stage can use. Follow an illustrative invoice-review workflow through its requirements, implementation, evaluation, and release boundary.

Execution model01 / 04
Context → reviewed change → release evidenceIllustrative processWorkflow contractBrief + design decisionsActors + source recordsPermitted actionsAcceptance criteriaCoding agentsContext + typed interfacesDiff → engineer reviewTests + integration behaviorEvaluation gateCandidate + versioned casesCode assertionsModel + workflow checksFailure traces + release limitsUnmet criterionCriteria met+ engineer approvalHold + reviseTrace → regression caseReview change; rerun gateReviewed releaseBuild + configuration + evidenceOwner + runbook + rollbackOne maintained engineering context.

Swipe to inspect the full diagram →

Workflow specificationExample record
Task
Review an invoice exception
Boundary
No ERP write before reviewer approval
Acceptance
Repeated approval cannot create a second bill

Follow the architecture as you scroll, or select a layer.

01

Turn the workflow into a testable contract.

Map users, source records, permitted actions, and failure cases. Record architecture decisions and acceptance criteria before implementation so people and coding agents work from the same context.

Input
Workflow, source systems, and operating constraints
Transform
Define boundaries and observable acceptance criteria
Output
Versioned brief and architecture decisions
Identify the decision ownerAgree the first release boundary
02

Build with coding agents and engineering review.

Maintain repository context and typed interfaces. Coding agents help implement, test, and document changes. Engineers review the diff, integration behavior, and failure handling against the agreed design.

Input
Architecture, examples, schemas, and repository context
Transform
Implement, inspect changes, and exercise integrations
Output
Reviewed code with explicit tool contracts
Validate model outputs against schemasKeep write authority outside the model
03

Test the behavior that the workflow depends on.

Combine code tests with representative model and workflow evaluations. Inspect the traces behind failures, add regression cases, and compare results against agreed quality, latency, and cost limits.

Input
Candidate build and reviewed example cases
Transform
Run tests, evaluate behavior, inspect failures
Output
Versioned results and a release recommendation
Test negative and uncertain outcomesSeparate model quality from integration correctness
04

Make the system operable by its next owner.

Review the release evidence, deployment configuration, and rollback path with your team. Document monitoring, escalation, and ownership so the next change follows an understood process.

Input
Reviewed build, evaluation evidence, operating owner
Transform
Accept release, deploy, verify, and hand over
Output
Release record, runbooks, and assigned ownership
Unmet release criteria keep deployment on holdAgree ongoing support and escalation

Engineering judgment

Different jobs need different controls.

We use models where interpretation helps and conventional code where the result must follow an explicit rule.

WorkModel contributionApplication enforcement

Understand the request

Interpret language, retrieve context, and propose a response.

Enforce identity, source permissions, and the permitted tool set.

Prepare a change

Extract fields and draft a structured proposal.

Validate schema, calculate amounts, and check business rules.

Execute an action

Explain the proposed action and its supporting evidence.

Verify approval, bind the exact payload, and reconcile retries.

Engineers own the implementation review. People set the operating policy, inspect consequential failures, and decide whether the release evidence meets the agreed criteria.

Delivery and continuity

A handover you can build on.

We agree code ownership, licensing, deployment accounts, and operating responsibilities before implementation. Your handover records those decisions alongside the system itself.

How an engagement works
Code and interfaces
Repository, architecture decisions, dependency notes, and API/tool contracts.
Evidence and tests
Representative cases, evaluation configuration, release results, and known limitations.
Deployment and recovery
Environment configuration, monitoring, incident response, and rollback instructions.
Ownership and support
Code and license terms, account access, operating responsibilities, and agreed support scope.

Let’s scope your next build.

Bring a workflow, a product brief, or an AI system that needs to ship.

Discuss your project