OpenCode v1.18.31 restores ACP session state on resume and adds adaptive thinking for Copilot models
SST
OpenCode released v1.18.31 on Sep 14, restoring ACP session model, effort, mode, and reasoning chunk boundaries when loading, resuming, or forking sessions. It also requests summarized adaptive thinking for GitHub Copilot models and surfaces remote config authentication errors at startup instead of failing silently.
Why it matters
The ACP fixes matter for the growing set of editors driving OpenCode over the Agent Client Protocol, where lost model/effort state on fork was silently degrading sessions.
Importance: 1/5
Minor version with quality-of-life ACP fixes
Sources
official
Releases - sst/opencode