v1.17.18

Termux Android build for v1.17.18.

• Upstream release: https://github.com/anomalyco/opencode/releases/tag/v1.17.18
• Release train: 1.17.18
• Promoted PR: #22
• Promoted PR head SHA: ac975d724f9ecda6a14b1a3d8feb8e1adcf4b611

Upstream release notes

Core

Bugfixes

• Prevent crashes and bad pricing data when GitHub Copilot returns models with a zero billing batch size.

Improvements

• Add a model-specific system prompt for Meta Muse Spark.