Ongoing Reliability Engineering

Eval suites rot in three ways. The model under the agent changes and the old thresholds stop meaning anything. The traffic changes and the dataset no longer represents it. The LLM-as-judge drifts, quietly, so scores go up while quality goes down. Left alone for six months, most suites become a green light nobody trusts. Ongoing reliability engineering is the work of keeping it trustworthy - a steady, usually part-time engagement that continues after a suite is built or assessed.

What we do

• Dataset growth. Mine production traces for new failure classes and under-represented journeys; add cases with provenance; report drift in the failure taxonomy.
• Judge calibration. Re-measure every LLM-as-judge against a fresh human-labeled sample of at least 50 cases each month. Rewrite rubrics that have slipped.
• Regression triage. When your team flags a model, prompt, tool-schema or retrieval change, we run the suite, read the diffs and report within one business day: what regressed, why, and whether it should block.
• Reliability reporting. A short written report for engineering leadership on a monthly cadence: pass rates by class, cost and latency trends, open risks, and what changed.
• Periodic red-team re-runs. Re-run the red-team battery against the current build each quarter, including every historical finding, and retire cases that no longer earn their place.

Who this is for

• Teams whose suite we built or assessed and who want the judges calibrated and the dataset current without staffing it internally.
• Teams that ship model or prompt changes weekly and need regression triage turned around in a business day.
• Engineering leaders who report upward and want a reliability number they can stand behind each month.

How we work with you

• Hourly time and materials on a steady cadence. Most teams settle into a predictable few days a month; the hours flex when a model migration or a launch pushes more change through.
• Suites we did not build start with a readiness assessment so we know what we are taking on.
• What it is not. Not production on-call - we keep the evaluation layer healthy; incident response stays with your team. Larger changes, a new agent, or a new tool surface are scoped as their own eval suite engineering project.

Next step

Tell us what your suite runs on and how often the model changes. Contact us.