A concise record of the problem, turnaround, verification and outcome. Submitted work is not presented as accepted work, and insufficient evidence is not turned into a claim.
Case 01 · TypeScript
Generic propagation in unjs/ofetch
A controlled engineering comparison in which both the baseline and GDN Creator initially produced the same plausible but incorrect abstraction.
Verified controlled result
Problem
The proposed repair passed ordinary repository checking but still failed the frozen acceptance harness with five diagnostics.
Turnaround
A bounded repair was triggered during the same controlled evaluation after the independent verifier rejected the first candidate.
Verification
Frozen controls, verified hashes, repository checks and a preserved upstream commit created a reproducible evidence trail.
Outcome
The repaired GDN candidate passed the frozen requirements. The baseline candidate failed. Classification: GDN win for this single controlled case.
Scope: one controlled case—not a claim of general superiority, production certification or security certification.
A duplicate-reply path was examined at the serialization boundary where a compact cached FTP reply was expanded into a full MAVLink message.
Contribution submitted
Problem
Unused payload bytes could survive cache reuse and enter duplicate-reply serialization instead of being deterministically cleared.
Turnaround
The defect boundary was isolated and a focused repair was prepared without expanding the surrounding protocol surface.
Verification
The compact cache is materialised into a zero-initialised full message, unused bytes are cleared, and regression coverage checks the expansion boundary.
Outcome
A reviewable upstream contribution was opened. Merge, acceptance and release status remain decisions for PX4 maintainers.
Public project reference retained; no claim of PX4 endorsement or deployment is made.
Disclosure: OC Labs uses AI-assisted engineering tools within the GDN workflow. GDN is model-independent and applies separate verification, evidence and human-approval controls. Public repositories and maintainers referenced above are not clients and do not endorse OC Labs unless explicitly stated.