The agent records the specification, the material data, and the approval basis behind a design or substitution decision.
Solutions · Construction
Replaces · Paper-based building records · Disconnected compliance silos
Verifiable AI for construction.
Every compliance decision attached to the building’s digital twin.
Building records are still largely paper-based and scattered across contractors, owners, and regulators. nOS attaches every compliance decision, material origin, and emissions record to the building digital twin, so context persists across the full lifecycle. Trace Labs contributes to initiatives such as the EU Digital Building Logbook to make construction compliance verifiable end to end.
Decision traces enshrinedMaterial origin and emissions Compliance approvals, deviations Renovation history and energy data Sub-contractor attestations
What gets captured
Most relevant memory layers
Shared & Verifiable
Working memory captures private agent reasoning. Shared memory is where multi-party context coordinates. Verifiable memory is where decisions are enshrined.
EU CSRD
Reporting-ready
Deployment & partners
EU Digital Building LogBook
Real enterprise data, processed in production, with decision traces enshrined as Knowledge Assets in the OriginTrail DKG.
The problem
The case for verifiable decisions in construction.
A building outlives every contract that produced it. Design decisions, material substitutions, and compliance sign offs are made by contractors and consultants who disperse at handover, leaving an owner with drawings that do not explain why the built asset differs from the design.
Reporting has caught up with that gap. CSRD disclosure and the EU Digital Building LogBook expect evidence about materials and performance across the asset lifecycle, which is difficult when the reasoning behind each substitution was never recorded in a form anyone else can check.
How it works
How a decision becomes verifiable.
Context the owner, contractor, and certifier are entitled to see moves into shared memory, so the as built record is assembled continuously rather than at handover.
Substitution and sign off decisions record their reasoning, including the standard applied and the party who accepted the deviation.
The trace is enshrined in the DKG and attaches to the building’s digital twin, so the reasoning survives the contract that produced it.
What changes
What this changes in practice.
The change is that the as-built record assembles itself. Rather than a handover package compiled at the end by whoever remains, each substitution and sign-off is recorded with its justification as it happens, so the owner receives reasoning rather than only drawings.
For the asset owner this compounds across the lifecycle. Refurbishment, resale, and disclosure all depend on knowing what was actually built and why, and that knowledge currently degrades every time a contract ends.
FAQ
Questions about construction.
What problem does this solve at handover?
Owners typically receive documents without the reasoning behind deviations. Verifiable traces mean the as built record explains why the asset differs from design, and who accepted each change.
How does this support CSRD reporting?
CSRD disclosures rest on material and performance claims. Traces provide the provenance behind those claims, so reporting is derived from verifiable records rather than assembled from contractor spreadsheets.
What is the EU Digital Building LogBook connection?
The Digital Building LogBook is named among the deployments in this area. The logbook is the container for lifecycle building data; decision traces supply verifiable provenance for what it contains.
Does every subcontractor need to participate?
No. Parties reference and sign the evidence they already produce. The value comes from decisions being traceable, not from every firm adopting the same software.
Who benefits most, the contractor or the owner?
The owner carries the asset for decades and gains most, but contractors benefit too: a signed record of why a deviation was accepted is the clearest defense against a later liability claim.
Does this require BIM?
No, though it complements it. BIM describes the asset; decision traces explain why the asset differs from the model and who accepted each change.
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