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Jonathan Andrei
04 / Build journals

Stories from the build.

What was hard, what broke, what survived the cut, one post per project. Sorted by the recency of the work, not the day I wrote it down.

FlakeWarden: 90.7% Accuracy and a 0% Safety False-Positive Rate on Flaky-Test Triage, on UiPath Maestro
Jun. 2026
11 min read

FlakeWarden: 90.7% Accuracy and a 0% Safety False-Positive Rate on Flaky-Test Triage, on UiPath Maestro

Flaky tests are the most corrosive failure mode in CI: a red build might be a real regression or just noise, and engineers eventually start ignoring red builds until a real bug ships. FlakeWarden answers the only question that matters (real defect, flaky, or environment) with a deterministic flake-scorer for the clear cases and a grounded UiPath Agent Builder classifier for the ambiguous ones, orchestrated through Maestro with a human approving every change. 90.7% accuracy on a 150-case corpus, with 0% safety false-positive rate enforced by mechanism.

AgentHackUiPathUiPath Maestro
LotZero: Zero Oversells and Zero Double-Spends on a Global Live Auction, Proven on Aurora DSQL
Jun. 2026
10 min read

LotZero: Zero Oversells and Zero Double-Spends on a Global Live Auction, Proven on Aurora DSQL

Real-time global commerce used to force a choice: a single-Region SQL box (correct but slow for distant bidders) or a multi-Region eventually-consistent store (fast but unsafe for money). Aurora DSQL collapses that tradeoff. LotZero puts the money ledger on DSQL and the social firehose on DynamoDB, then proves the invariant with a contention console that fires hundreds of concurrent global claims and measures: zero oversells, zero double-spends.

H0HackathonAmazon Aurora DSQLAmazon DynamoDB
OrbitOnboard: I Used All Four GitLab Orbit Query Types to Generate a Contributor Starter Kit in 10 Seconds
Jun. 2026
11 min read

OrbitOnboard: I Used All Four GitLab Orbit Query Types to Generate a Contributor Starter Kit in 10 Seconds

Half of new contributors abandon their first attempt to contribute to an unfamiliar codebase. Not because the problem is too hard, but because the map doesn't exist. OrbitOnboard generates that map by exercising all four Orbit query types in one coordinated workflow: critical files, reading order, expert map, similar past MRs, related open issues, posted directly as an issue comment.

GitLab OrbitKnowledge GraphDeveloper Experience