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How it works

Your production system is the specification.

Production is the starting evidence. A reviewed System Specification is the contract we agree to build and prove against. Five stages, each with an output your team can check.

The method, step by step

Scroll through one workflow, from first look to live.

Each step produces something your team can review before the next one starts. The diagram follows a single illustrative workflow.

01 / 05 · ObserveProduction stays live

Every request is served exactly as before.

ObserveSpecifyBuildProveShift

Illustrative example. Names and figures are not from a client system.

01 · Observe

Understand the system that actually runs.

Through a guided, semi-automated setup we connect application instrumentation, request traffic and available product analytics, read the schema and map reporting dependencies. Each pass adds evidence. Behavior that has not been observed stays an explicit gap.

  • Requests, background jobs, errors and queries, tagged by release
  • Representative workflows, business cycles and rare paths
  • Sensitive payloads redacted and collection kept off the request path

No change to what your customers see.

02 · Specify

Turn evidence into a commitment.

Owners and engineers review workflows, rules, data relationships and exceptions. When coverage and confidence are sufficient for an agreed scope, a versioned System Specification is approved, with testable outcomes and known limits. Unresolved gaps lead to more observation or a narrower scope.

  • Rules, inputs and outputs, data relationships and state transitions
  • Every claim linked to evidence, with uncertainty and exclusions recorded
  • Acceptance criteria your team signs off

Your owners approve what gets built.

03 · Build

Compress the reconstruction cycle.

Engineering agents rebuild the scoped workflow on a modern architecture in short, tightly scoped sprints against the approved specification. Engineers review the results. Relevant production changes update the contract and its tests, so the rebuild tracks a moving business.

  • Work visible on a shared board, with an owner for every step
  • Each change reviewed against written standards
  • Spend capped per item and per day

Built alongside. No customer traffic yet.

04 · Prove

Don't trust the rewrite. Prove it.

Both implementations are compared against the same specification. We check business outcomes, data and reports, permissions and performance, and resolve differences before the replacement takes on any responsibility.

  • Replay or shadow representative workloads with side effects controlled
  • Totals and reports reconciled against the current system
  • A proof report that supports an explicit go or no-go decision

Differences are measured, not assumed away.

05 · Shift

Move production when the evidence supports it.

We shift a bounded workflow or cohort at a time, with acceptance criteria, a data transition plan and rollback. Evidence and the contract stay current, then the next agreed priority starts. Your team approves each transition.

  • Illustrative path: 1%, then 10%, then 50%, then 100%, each step gated on evidence
  • Rollback tested before it is needed
  • Data cutover handled as its own workstream

Your pace. Your approval. A way back at every step.

If a freeze is required

Make the window workable.

Some replacement plans need a period of stable behavior or schema during reconstruction, validation or cutover. A freeze is not assumed: parallel builds and incremental replacement do not need a whole-system freeze. Where one is needed, we agree what it covers and how much interruption the business can accept.

Our hypothesis is that agent-driven sprints against an observation-derived specification can compress a required freeze to days or weeks for an agreed scope. That is a target a pilot measures, not a promise about an entire migration.

Humans and agents on one board

Autonomous where it helps. Human where it matters.

Business analyst, architect, developer, QA and DevOps roles run each item through declared stages. People step in at the gates that matter: plan review, merge, open findings and budget. Nothing moves to production without your team's approval.

Fabrica · NEXA TSOS · Boardloop armed · 2/3 running
To do2
fab-4h8kP2
Norma policy page: version history
normaF
fab-8q1zP1
Aula SSO session refresh loops on expired cookie
aulaAN
In progress9
AnalysisBA
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Metra: weekly utilisation digest
analysis · running · 2m
metra$0.38F
Plan reviewhuman
fab-2k7vP1
Excelsior: import rate cards from spreadsheet
needs human · plan review2 REQ$3.10
ImplementingDev
fab-9k2pP1
Flag unbillable allocation lines when no rate card
implementing · pass 1 · 11m
assigna1 REQ$4.12F
Done38
fab-7w3eP2
Metra: utilisation chart ignores public holidays
metradeployed
fab-c214P2
Provenance panel on work item
deployed$14.30F
fab-ydmhP3
Human merge recorded by webhook
deployedAN

What you can inspect

Every stage leaves something to review.

Observe

Evidence imprint

Correlated requests, jobs, queries and outcomes, with provenance, version history and known unknowns.

Specify

System Specification

A versioned contract of rules, data and acceptance tests. Enough to build and prove, with its limits stated.

Build

Board and pull requests

Each workflow's items, owners, stage and cost, and every change as a reviewed pull request in your repository.

Prove

Proof report

Outcome, data, permission and performance differences, and how each one was resolved.

Shift

Shift plan and log

Acceptance criteria, cohorts, rollback steps and the record of every transition.

Ongoing

Living documentation

Pages that stay current as linked work reaches done, so the next renewal starts from what is known.

What would you like the business to do next?

Book a 30-minute conversation about one priority and the system behind it. You leave with a practical first step.

Explore your renewal options