ROOKWELDOnsite IT work often starts with an incomplete description and pressure to produce an answer. Observations end up scattered between utilities, conversations and notes. The useful question behind FieldRook was simple: what would make the next diagnostic step defensible?
A short window, a concrete problem
The Meta Global AI Developer Hackathon 2026 gave the project a focused development window. The first diagnosis slice arrived on October 26. Bounded actions, persistence and verification followed. The hackathon has now concluded; participation is part of the project’s history, not a claim of an award or endorsement.
From a demonstration to a workstation
The work grew beyond a single model demonstration. Evidence collection became structured investigations. A WPF and WebView2 shell gave the React interface its own native Windows application, backed by a packaged local Python and FastAPI engine. Case persistence and exports made it possible to revisit the reasoning.
Collector imports added another evidence route without turning the workstation into a remote-command service. Proposed actions acquired explicit boundaries. The technician remained responsible for deciding whether to proceed.
The difficult part is knowing what you know
A confident explanation is not evidence. An intervention completing is not a measured outcome. Those distinctions shaped the interface: observations, human reports and model interpretation remain distinguishable, and verification can end unresolved or inconclusive.
The same principle applies to the demonstration. The published v0.6.0-rc.1 package uses a labelled simulated provider and fixture data. Live Meta inference was not verified for that build. Showing those limits is part of the engineering record.
A public release makes the work inspectable
The November 3 pre-release adds Field Kit, Evidence Lens and Network Lab. Its release notes document build-time tests, and the downloadable package includes provenance and checksums. The Apache-2.0 source allows others to inspect the implementation and report reproducible problems.
FieldRook is also included in the XERJ Corpus Hub, which indexes a selected historical snapshot of the technical work. That inclusion is not a product certification or award.
What remains to be learned
Unsigned binaries, broader machine trials, upgrade scenarios and provider validation remain practical limits. Process Watch, Event Decoder, Command Deck and Field Notes are concepts, not shipped promises. The next work should earn its place through useful evidence and repeatable behavior.
FieldRook is independent studio work informed by operational experience. The public record is there to be questioned, tested and improved.