OpenCode v1.17.18 Changelog
What changed in OpenCode CLI v1.17.18, released 2026-07-09 — explained in plain English.
- Fixed a bug where GitHub Copilot could crash the app or mess up pricing calculations.
- Added a custom system prompt (background instructions) for the Meta Muse Spark AI model to help it work better.
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This update is a quick tune-up for OpenCode, focusing on making sure the app doesn't crash when talking to GitHub Copilot and helping a specific AI model, Meta Muse Spark, behave more reliably. It mostly matters to developers who use these specific AI tools while coding.
Improvements
- Better instructions for Meta Muse Spark: We added a custom "system prompt" for the Meta Muse Spark AI model. A system prompt is like a set of ground rules that tells the AI how to behave and answer your questions before you even start typing.
Fixes
- GitHub Copilot crashes and pricing errors: Sometimes, GitHub Copilot (an AI coding assistant) would send back information saying a "billing batch size" was zero. This confused the system, causing OpenCode to crash or display incorrect pricing data. We fixed this so the app handles those zero values smoothly without breaking.
Breaking changes
No breaking changes in this release.
How to upgrade
Update to OpenCode v1.17.18 by running:
npm install -g opencode-aiThis is our plain-language summary. Read the complete, official notes on the OpenCode official changelog ↗.
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