Aman Tiwari https://amant03.com/blog/ Technical notes on React, Node.js, Kafka, APIs, and the web platform. en How to scope a coding-agent task so the diff stays reviewable https://amant03.com/blog/scope-a-coding-agent-task/ https://amant03.com/blog/scope-a-coding-agent-task/ Fri, 23 Oct 2026 18:30:00 GMT Name the files, the failing case, and the modules that are off limits. A coding agent is useful when the diff still fits in a review. When to split a Kafka topic https://amant03.com/blog/when-to-split-a-kafka-topic/ https://amant03.com/blog/when-to-split-a-kafka-topic/ Thu, 22 Oct 2026 18:30:00 GMT Put messages that differ in size, rate, or consumer on different topics. A shared partition makes the slow consumer everyone's problem. The JWT checks worth testing on an API https://amant03.com/blog/jwt-checks-worth-testing/ https://amant03.com/blog/jwt-checks-worth-testing/ Wed, 21 Oct 2026 18:30:00 GMT Verify signature, audience, and expiry, then check the row. A role is not permission to open a record. What a WebSocket event should carry https://amant03.com/blog/what-a-websocket-event-should-carry/ https://amant03.com/blog/what-a-websocket-event-should-carry/ Tue, 20 Oct 2026 18:30:00 GMT Send the fact that a record changed. Let the same HTTP handler that loaded the page load it again. How to keep a serverless bundle small https://amant03.com/blog/keep-a-serverless-bundle-small/ https://amant03.com/blog/keep-a-serverless-bundle-small/ Mon, 19 Oct 2026 18:30:00 GMT Ship the page, not the working set of the job that built it. A function that grows with the corpus will cold-start like one. Put Sequelize associations in one place https://amant03.com/blog/sequelize-associations-in-one-place/ https://amant03.com/blog/sequelize-associations-in-one-place/ Sun, 18 Oct 2026 18:30:00 GMT A model file defines a table. Relationships are declared after every model exists. Sync is not a migration. Sync a shared editor with operations, not snapshots https://amant03.com/blog/sync-a-shared-editor-with-operations/ https://amant03.com/blog/sync-a-shared-editor-with-operations/ Sat, 17 Oct 2026 18:30:00 GMT Two people typing into full-buffer snapshots will overwrite each other. Sequence the edits, and keep the call on its own clock. Give each React screen its own fetch https://amant03.com/blog/a-react-screen-that-fetches-its-own-data/ https://amant03.com/blog/a-react-screen-that-fetches-its-own-data/ Fri, 16 Oct 2026 18:30:00 GMT A list filters records that already exist. A detail screen loads what it renders. A context cache with no owner goes stale. Fail CI when the API spec drifts https://amant03.com/blog/fail-ci-when-the-api-spec-drifts/ https://amant03.com/blog/fail-ci-when-the-api-spec-drifts/ Thu, 15 Oct 2026 18:30:00 GMT A spec that fails the build when it disagrees with the handlers is documentation. A spec in a wiki is last quarter. Checks to make before a REST handler ships https://amant03.com/blog/checks-before-a-rest-handler-ships/ https://amant03.com/blog/checks-before-a-rest-handler-ships/ Wed, 14 Oct 2026 18:30:00 GMT Validate the body, name the columns, map the real status codes, and read the row back in the test. What a crawlable blog post contains https://amant03.com/blog/what-a-crawlable-post-contains/ https://amant03.com/blog/what-a-crawlable-post-contains/ Tue, 13 Oct 2026 18:30:00 GMT One title, a date in the HTML, a canonical URL, and a page that still makes sense if the script fails to load.