OpenClaw 2026.9.3 ships rehearsed updates and prompt-cache-preserving performance work

OpenClaw v2026.9.3 (Sep 8) rehearses core and plugin updates in an isolated candidate state before activation, supports eligible 2026.9.2 migrations, and recovers abandoned update records without stopping a healthy Gateway. The release also preserves warm prompt caches, reuses worker builds between sessions, and continues the Skill Workshop work keeping skills in one persistent agent-owned collection across workspaces.