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Disclosure: I build Schemity , a desktop ERD tool - this post is from our blog and uses it for the examples. TL;DR: Use the pattern PostgreSQL alrea…
Milestone 4 of IncidentCopilot — an open-source, local-first AI DevOps Incident Copilot 📌 Introduction Logs are plentiful during outages — the chall…
At 2 a.m. on a Tuesday, a client's reporting replica silently stopped applying changes. The publisher kept accepting writes. The replica kept answer…
PostgreSQL 19 was supposed to ship in October. The release team now says general availability is November 19, with RC 2 on November 12 (postgresql.o…
I'm Duc. Since May 2025 I've been building Excalibase on nights and weekends, next to my day job. It started as a GraphQL engine for Postgres, becau…
Introduction: The Headline That Made My Stomach Drop Almost every week, we see another headline about a major tech company or hot startup suffering…
Yesterday I added an optional phone number to Nakodo. When a creator or a business says yes to a brand, the app introduces them by email, and the br…
The largest test file in PubTrivia is 543 lines, and it has no mocks in it. It calls the actual server actions a player's phone calls, and the actua…
This is a submission for the MLH x DEV Writing Challenge What I Built Here is a bug that drove me crazy for three days straight. You ask an autonomo…
I like the Supabase JS client. .from('todos').select('id, task').eq('done', false) reads like what I mean, and { data, error } means I'm not wrappin…
Why "just retry" creates duplicate payments, and a PostgreSQL-backed design for idempotency keys that survives double clicks, timeouts, crashes and…
Pg_verifybackup was introduced in PostgreSQL 13 and is used to check the integrity of a base backup taken using Pg_basebackup against the backup_man…
Email verification looks like a small feature: create a token, send a message, and accept the token when the user clicks it. In a real Node.js servi…
The memory built into a coding agent lives inside that vendor's tools. What I tell one agent stays with that agent, and the next one I open in the s…
Email verification looks like a simple two-request flow: create an account, send a message, then accept a token. In a production REST API, it is clo…
Most multi-tenant SaaS products keep customers apart with one line of code repeated a few hundred times: const invoice = await db . invoice . findFi…
PostgreSQL has been the most popular open source database since 2020 and matured over decades. Many organization have already started migrating thei…
We wanted one number: how far does ADA have to fall before a real share of Indigo's loans gets liquidated? Indigo is a Cardano protocol where you lo…
If a unique index suddenly tolerates duplicates, or WHERE email = ... misses a row that a sequential scan finds, the index is sorted by collation ru…
A dashboard query runs while a background job updates ten thousand rows. In a lock-based engine, that SELECT waits—sometimes for seconds—until every…
PostgreSQL Point-in-Time Recovery in Kubernetes: WAL-G + Stolon Pattern We recovered a 2TB PostgreSQL database to 14:32:18 yesterday after a botched…
We run Docto24 , a German telemedicine platform: patients book online consultations, licensed physicians review medical questionnaires and issue e-p…
Email verification looks like a simple endpoint: accept an address, create a token, send a message, and return 202. In a real REST API, the difficul…
Integration tests for authentication often fail after the assertion has already passed. The user was created, the verification message arrived, and…
Disclosure: I build Schemity , a desktop ERD tool - this post is from our blog and uses it for the examples. TL;DR: For schema work an AI agent need…
Disclosure: I build Schemity , a desktop ERD tool - this post is from our blog and uses it for the examples. TL;DR: Pick the action by what the chil…
Disclosure: I build Schemity , a desktop ERD tool - this post is from our blog and uses it for the examples. TL;DR: Grant CONNECT on the database an…
Disclosure: I build Schemity , a desktop ERD tool - this post is from our blog and uses it for the examples. TL;DR: On PostgreSQL 11 and later, ADD…
A Node.js notification service should capture each Postgres cron worker background job error as attempt evidence, then create one durable failure re…
Today I want to talk about split-brain. The name sounds dramatic, and the problem is dramatic too. One system splits into two halves, and each half…