Tools
opencode 1.18.26 tolerates stale thinking blocks on Claude 5 sessions instead of failing the turn
Released 2026-09-01 under the anomalyco org, opencode v1.18.26 makes Claude 5 sessions tolerate stale thinking blocks rather than failing after a prompt or tool change, lets Bedrock GPT-5.6 models accept `none` reasoning effort, and bumps `@ai-sdk/amazon-bedrock` to 4.0.166 for reasoning and replay fixes. Tool-call timing also stays accurate when tools update their metadata mid-run. Extended-thinking blocks going stale when the tool set changes mid-session is a failure mode that bites any harness that edits its own tool list between turns.
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