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QA & AI Automation Blog

Practical insights on Playwright, self-healing tests, AI-driven QA, and scaling engineering teams. Real lessons from 20+ years in quality engineering.

140 posts

Replay the Decision, Not the Answer
AI & AutomationAug 31, 2026

Replay the Decision, Not the Answer

Agent tests that compare only final answers miss the failure that matters: the same input can produce a different tool choice, path, or refusal before the answer changes.

AI Infrastructure 101 for QA Engineers: From a Prompt to a Test Result
AI & AutomationAug 30, 20265 min
1

AI Infrastructure 101 for QA Engineers: From a Prompt to a Test Result

AI infrastructure for QA engineers: understand the path from data center, GPUs, memory, and networking to model execution and reliable LLM evaluation.

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The Record Cannot Authorize the Fix
Career & Best PracticesAug 29, 20264 min
1

The Record Cannot Authorize the Fix

A failure log can preserve the facts and still leave the system unchanged. The missing field is not more context. It is authority.

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The Runbook Is Not the System
Career & Best PracticesAug 28, 20265 min
1

The Runbook Is Not the System

A documented fix is not a shipped fix. The difference is a control boundary: who can execute it, when, and what proves it happened.

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A Retry Is Not a Trading Decision
Quantitative TradingAug 27, 20264 min
1

A Retry Is Not a Trading Decision

A rejected order is a decision. Retrying it without preserving the reason can turn a risk control into a duplicate trade.

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The Log Is Part of the Agent's Interface
Agentic AIAug 26, 20264 min
1

The Log Is Part of the Agent's Interface

An agent that can act but cannot leave a useful decision record is not autonomous. It is an opaque process with write access.

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The Market Is Closed Is Not a Trading Rule
Quantitative TradingAug 25, 20265 min
1

The Market Is Closed Is Not a Trading Rule

A backtest can know the exchange hours and still schedule a trade into a holiday, an early close, or a stale session. Calendar state is market data.

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The Agent Did Not Need More Context
Agentic AIAug 24, 20265 min
1

The Agent Did Not Need More Context

When an agent edits a shared checkout, the dangerous variable is not context length. It is the boundary around what the run is allowed to write.

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