OpenClaw v2026.4.21 Release: Essential Security & Stability Upgrades

OpenClaw 2026.4.21 Release: Better Image Generation, Safer Commands, and Under-the-Hood Fixes OpenClaw’s v2026.4.21 release landed on April 21, 2026. It doesn’t introduce flashy new features, but it fixes several practical pain points: upgrading the default image‑generation model, making plugin dependencies recoverable, tightening command permissions, keeping Slack messages inside their intended threads, speeding up browser automation, and cleaning up npm install warnings. If you’re running OpenClaw as a gateway or automation hub, this release matters. Let’s walk through each change – what changed, why, and how it affects you. 1. Image Generation: Defaults to gpt-image-2 with 2K/4K Size Hints What changed? …