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Field notes from production AI.

Long-form essays from the engineers shipping AI inside payers, hospitals, energy operators and proptech platforms. Written for technology leaders who care more about what runs in production than what trended last week.

All essays

Field notes, sorted by recency.

15 essays
QUALITY ENGINEERING A Buyer's Guide toRegression testingfor prompts. A Buyer's Guide to Regression testingfor prompts helps CTO / Head of AI… 100% EFFORT MIX Strategy 32% Engineering 26% Governance 24% Enablement 18%
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A Buyer's Guide to Regression testing for prompts

A Buyer's Guide to Regression testing for prompts helps CTO / Head of AI leaders connect test cases, behavioural rubric, model matrix, change attribution, and release gating to reliable production outcomes. Learn the 2026 operating model, components, pitfalls, signals, and implementation steps.

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QUALITY ENGINEERING A Buyer's Guide toContract testing formodel APIs. A Buyer's Guide to Contract testing formodel APIs helps VP Engineering / Head… 01 Pilot 02 Team 03 Org 04 Scale BUYER CONTRACT
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A Buyer's Guide to Contract testing for model APIs

A Buyer's Guide to Contract testing for model APIs helps VP Engineering / Head of Infrastructure leaders connect request schema, response envelope, version metadata, error semantics, and behavioural compatibility to reliable production outcomes. Learn the 2026 operating model, components, pitfalls, signals, and implementation steps.

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QUALITY ENGINEERING A Buyer's Guide toChaos testing AIdependencies. A Buyer's Guide to Chaos testing AIdependencies helps VP Engineering / Head… BUYERCHAOS DO Define ownership earlyMeasure before scalingBuild for observability AVOID Unclear accountabilityPremature optimizationBlack-box systems
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A Buyer's Guide to Chaos testing AI dependencies

A Buyer's Guide to Chaos testing AI dependencies helps VP Engineering / Head of Infrastructure leaders connect dependency map, failure hypotheses, degradation injection, safety boundaries, and recovery evidence to reliable production outcomes. Learn the 2026 operating model, components, pitfalls, signals, and implementation steps.

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QUALITY ENGINEERING A Buyer's Guide toLoad testing agenticsystems. A Buyer's Guide to Load testing agenticsystems helps VP Engineering / Head of… DISCOVERY DESIGN DELIVERY SCALE
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A Buyer's Guide to Load testing agentic systems

A Buyer's Guide to Load testing agentic systems helps VP Engineering / Head of Infrastructure leaders connect task model, agent step distribution, tool dependencies, concurrency and queues, and cost and failure metrics to reliable production outcomes. Learn the 2026 operating model, components, pitfalls, signals, and implementation steps.

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QUALITY ENGINEERING A Buyer's Guideto Goldendatasets. A Buyer's Guide to Golden datasets helpsCTO / Head of AI leaders connect… DISCOVERY DESIGN DELIVERY SCALE
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A Buyer's Guide to Golden datasets

A Buyer's Guide to Golden datasets helps CTO / Head of AI leaders connect use-case coverage, failure classes, label quality, versioning, and refresh policy to reliable production outcomes. Learn the 2026 operating model, components, pitfalls, signals, and implementation steps.

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QUALITY ENGINEERING A Buyer's Guide toTest automation forAI-written code. A Buyer's Guide to Test automation forAI-written code helps VP Engineering /… PEOPLE PROCESS PLATFORM PRACTICE BUYER TEST
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A Buyer's Guide to Test automation for AI-written code

A Buyer's Guide to Test automation for AI-written code helps VP Engineering / Head of Infrastructure leaders connect change classification, static and unit checks, integration boundaries, security tests, and review and provenance to reliable production outcomes. Learn the 2026 operating model, components, pitfalls, signals, and implementation steps.

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QUALITY ENGINEERING A Buyer's Guide toHallucinationdetection. A Buyer's Guide to Hallucinationdetection helps CTO / Head of AI leaders… DISCOVERY DESIGN DELIVERY SCALE
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A Buyer's Guide to Hallucination detection

A Buyer's Guide to Hallucination detection helps CTO / Head of AI leaders connect claim segmentation, evidence availability, support checking, risk weighting, and response policy to reliable production outcomes. Learn the 2026 operating model, components, pitfalls, signals, and implementation steps.

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QUALITY ENGINEERING A Buyer's Guide toSynthetic test datageneration. A Buyer's Guide to Synthetic test datageneration helps CTO / Head of AI… STRATEGY DELIVERY GOVERNANCE SCALE BUYERSYNTHETIC
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A Buyer's Guide to Synthetic test data generation

A Buyer's Guide to Synthetic test data generation helps CTO / Head of AI leaders connect use-case constraints, generation method, privacy controls, distribution checks, and validation and refresh to reliable production outcomes. Learn the 2026 operating model, components, pitfalls, signals, and implementation steps.

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QUALITY ENGINEERING A Buyer's Guide toLLM-as-judgeevaluation. A Buyer's Guide to LLM-as-judgeevaluation helps CTO / Head of AI… BUYER LLM DO Start from metricsShip incrementallyAutomate the guardrails AVOID Big-bang rolloutsSkipping discoveryManual, ad-hoc checks
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A Buyer's Guide to LLM-as-judge evaluation

A Buyer's Guide to LLM-as-judge evaluation helps CTO / Head of AI leaders connect rubric design, reference examples, judge model, calibration set, and agreement monitoring to reliable production outcomes. Learn the 2026 operating model, components, pitfalls, signals, and implementation steps.

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QUALITY ENGINEERING A Buyer's Guide toBias and fairnesstesting. A Buyer's Guide to Bias and fairnesstesting helps CTO / Head of AI leaders… FOUNDATIONS IMPLEMENTATION OPTIMIZATION IMPACT
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A Buyer's Guide to Bias and fairness testing

A Buyer's Guide to Bias and fairness testing helps CTO / Head of AI leaders connect decision context, group definition, outcome metrics, data coverage, and mitigation and monitoring to reliable production outcomes. Learn the 2026 operating model, components, pitfalls, signals, and implementation steps.

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QUALITY ENGINEERING A Buyer's Guide toCanary releases formodel updates. A Buyer's Guide to Canary releases formodel updates helps CTO / Head of AI… 01 Ad hoc 02 Managed 03 Defined 04 Optimized BUYER CANARY
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A Buyer's Guide to Canary releases for model updates

A Buyer's Guide to Canary releases for model updates helps CTO / Head of AI leaders connect traffic cohort, behavioural metrics, baseline comparison, promotion policy, and rollback to reliable production outcomes. Learn the 2026 operating model, components, pitfalls, signals, and implementation steps.

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QUALITY ENGINEERING A Buyer's Guide toRed-teaming AIproducts. A Buyer's Guide to Red-teaming AIproducts helps CISO / VP Security… 01 Scope 02 Build 03 Launch 04 Iterate
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A Buyer's Guide to Red-teaming AI products

A Buyer's Guide to Red-teaming AI products helps CISO / VP Security leaders connect threat model, attack scenarios, system boundaries, control verification, and remediation and retest to reliable production outcomes. Learn the 2026 operating model, components, pitfalls, signals, and implementation steps.

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QUALITY ENGINEERING A Buyer's Guideto Groundednessscoring. A Buyer's Guide to Groundedness scoringhelps CTO / Head of AI leaders connect… 01 Assess 02 Design 03 Ship 04 Operate
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A Buyer's Guide to Groundedness scoring

A Buyer's Guide to Groundedness scoring helps CTO / Head of AI leaders connect claim extraction, evidence retrieval, support judgement, aggregation policy, and threshold and review to reliable production outcomes. Learn the 2026 operating model, components, pitfalls, signals, and implementation steps.

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QUALITY ENGINEERING A Buyer's Guide toShadow deploymentfor models. A Buyer's Guide to Shadow deployment formodels helps CTO / Head of AI leaders… 01 Level 1 02 Level 2 03 Level 3 04 Level 4 BUYER SHADOW
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A Buyer's Guide to Shadow deployment for models

A Buyer's Guide to Shadow deployment for models helps CTO / Head of AI leaders connect traffic mirroring, input parity, output capture, comparison metrics, and privacy and cost controls to reliable production outcomes. Learn the 2026 operating model, components, pitfalls, signals, and implementation steps.

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QUALITY ENGINEERING A Buyer's Guide toAcceptance criteria forprobabilistic output. A Buyer's Guide to Acceptance criteriafor probabilistic output helps CTO /… 01 Assess 02 Design 03 Ship 04 Operate
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A Buyer's Guide to Acceptance criteria for probabilistic output

A Buyer's Guide to Acceptance criteria for probabilistic output helps CTO / Head of AI leaders connect task definition, quality dimensions, tolerance bands, failure taxonomy, and escalation and release gates to reliable production outcomes. Learn the 2026 operating model, components, pitfalls, signals, and implementation steps.

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