Four systems. Four measured outcomes. Every one links to the receipt.

A quality platform is only trustworthy if it can fail. On a real run, the dependency-audit gate found 15 high/critical CVEs. The honest verdict was not shippable, not a green badge.

• Let the gate go red and published the verbatim run: no quiet override
• Fixed the drift at the source: 9 pinned security floors, killing the unpatchable transitive chain
• Re-ran the full battery: 85 runners incl. 10 LLM-safety evals

3,759 tests · 91% coverage · 13/13 gates. High/critical CVEs: 15 → 0. The whole caught→blocked→patched→proven arc is on the site, both captures included.

Most suites are script soup: coverage follows whoever wrote tests last, red is ignored because it's flaky, and every failure starts a screenshot scavenger hunt.

• Risk model → coverage matrix, so coverage tracks release risk
• Page Object Model, fixtures, trace-on-retry, four reporters
• Wired into CI with artifact retention, a green badge that means something

37/37 specs, zero flakes, 15.3s. The evidence folder — traces and screenshots — ships in the public repo. Clone it and reproduce the run.

Most RAG demos hallucinate confidently. "Grounded" is claimed in the prompt and quietly violated in production the first time retrieval comes back thin.

• Built retrieval so every answer is bound to ranked, selected chunks
• Removed the uncited generation path entirely: abstain when there's no evidence
• Tracked quality, safety, latency, and cost per query on an analytics endpoint

100% citation coverage, by construction. Verified live. I ran it, asked a real question, and captured the actual cited answer (screenshot on the homepage).

A flaky suite is worse than none: when red is noise, the team learns to ignore it, and the real regression sails through with the false alarms.

• Diagnosed the flake sources: shared state, timing, ordering
• Installed a flake protocol: quarantine lane, retry policy, isolation fixes
• Kept the existing suite and treated rebuild as the last resort

Flake rate 10% → under 1%. Red became a real signal again, carried on the same Fortune-50-grade discipline behind 500+-test infrastructure earlier in my career.