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Ideas, updates, and practical guides from CodeSapient Labs.

Chalkboard illustration titled Slow PostgreSQL queries, listing find, read, fix and prove steps beside a query plan where a 42.4 ms sequential scan becomes a 0.26 ms index scan

PostgreSQL Slow Query Optimization: A Practical EXPLAIN ANALYZE Workflow

Find the PostgreSQL queries that cost the most with pg_stat_statements, read their plans with EXPLAIN ANALYZE, and fix them with the right index, query rewrite or statistics, with real before-and-after plans from a PostgreSQL 18 lab.

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Industrial hazard-tape style security notice reading Latest PHP Vulnerabilities, 2026 CVEs and how to fix them, with patched versions 8.2.35, 8.3.36, 8.4.27 and 8.5.12

Latest PHP Vulnerabilities (October 2026): CVEs, Affected Versions and How to Fix Them

PHP 8.2.35, 8.3.36, 8.4.27 and 8.5.12 fix two critical unauthenticated RCE flaws. See every recent PHP CVE, which versions are affected, and a step-by-step patch and hardening plan.

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16-bit pixel-art castle labelled GATE and DATA, with a guard stopping flagged scrolls of untrusted input on the road and a net over the tower blocking a carrier pigeon, illustrating prompt injection prevention at the tool boundary

Prompt Injection Prevention for AI Agents: An Architecture-First Guide

Prompt injection cannot be fully prevented with prompts or filters. Learn how to threat-model AI agents with the Rule of Two, enforce policy at the tool boundary, close exfiltration channels, and test like an attacker.

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Neon synthwave illustration of task cards travelling along a glowing grid from an HTTP node to three worker towers, representing the Django Tasks framework moving work out of the request cycle

Django Tasks Framework: A Production Guide to Background Jobs in Django 6

Django 6 ships a built-in Tasks framework for background jobs, but no worker. Learn how to define and enqueue tasks, pick a production backend, enqueue safely after commit, and decide when to keep Celery.

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Papercut illustration of an AI agent orb sending request envelopes along three paper ribbons to three identical server towers, representing a stateless remote MCP server

Remote MCP Servers for SaaS: Build on the Stateless 2026-07-28 Spec

The MCP 2026-07-28 spec makes remote MCP servers stateless. Learn what changed, how to design tools and OAuth authorization for a SaaS product, and how to migrate an existing server.

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Vintage airmail envelope with Canada, United States and France postage stamps and a postmark, illustrating Shopify shipping options moving into Markets

Shopify Shipping Options by Market: What Changes and How to Prepare

Shopify is moving shipping from shipping profiles into Markets. Learn how shipping options by market change checkout rate totals, what the automatic upgrade migrates, and what Shopify apps must update.

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Memphis-style poster reading Shopify Metafields and Metaobjects with playful geometric shapes on a cream background

Shopify Metafields and Metaobjects: Custom Store Data That Scales

A practical guide to Shopify metafields and metaobjects: definitions, app-owned vs merchant-owned namespaces, Liquid and Admin GraphQL usage, metaobject types, and how to avoid N+1 reads and schema drift.

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Swiss International Style poster reading Transactional Outbox Pattern with numbered blocks for domain write, outbox insert, and relay to broker

Transactional Outbox Pattern for SaaS: Fix Dual-Write Failures

How the transactional outbox pattern stops dual-write bugs in SaaS APIs: write domain state and an outbox row in one transaction, relay to the broker asynchronously, and keep consumers idempotent.

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Art Deco poster reading Shopify Webhooks with a signal-tower skyline, gold sunburst, and Verify Queue Ack

Shopify Webhooks Done Right: HMAC, Retries, Idempotency, and Compliance

A production guide to Shopify webhooks: verify HMAC on the raw body, acknowledge within five seconds, deduplicate retries, handle compliance topics, and reconcile when deliveries are missed.

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