OpenCode v1.18.15 fixes chronological message ordering, adds desktop session export

Tools official 1 src. ~1 min

OpenCode (sst) shipped v1.18.15 on August 7, 2026, fixing chronological message ordering when imported or legacy message IDs are out of order, adding JSON export of full session transcripts on desktop, and fixing blob attachment and tmux clipboard bugs.

Why it matters

Session-transcript export and ordering fixes are incremental but keep the open-source coding-agent alternative to Codex/Claude Code stable for teams building on it.

Importance: 1/5

Patch-level bug fixes and a minor export feature.

opencode cli coding-agent sst

Sources

official sst/opencode releases