A place to start
Reliable interfaces are made of details: a visible focus indicator, a dialog that returns focus, a table that can scroll without breaking the page, and identifiers that survive text processing. Use these references when implementing or reviewing the parts visitors interact with every day.
Practical guide
Make search dialogs and wide reference tables usable with a keyboard, narrow screens, and reduced motion.
Read the guide →Practical guide
Roll out CSP and browser security headers with a resource inventory, report-only checks, and concrete compatibility tests.
Read the guide →Practical guide
Handle composed text, accents, Turkish casing, and confusable identifiers while preserving original multilingual content.
Read the guide →Practical guide
Choose explicit timestamp units, preserve local scheduling intent, and avoid double-counting events at reporting boundaries.
Read the guide →Make cache behavior, retries, and response headers explicit before your endpoint reaches production.
02Ground answers in compact reference data, validate the shape, and measure the failures.
03Choose joins, windows, indexes, and transaction boundaries from the question you need to answer.
04Find files, recover Git work, and write shell commands that handle real filenames.
06Connect service signals, background jobs, probability, and experiment design to real decisions.
