Anthropic silently switched adaptive-thinking's display default to
"omitted" starting with Claude Opus 4.7, so the Bedrock provider
stopped surfacing any reasoning content — observed in the wild as
silent streams and timeouts on long reasoning runs.
Mirrors the existing direct-Anthropic behavior in this repo:
- For adaptive-thinking models that accept the field (Opus 4.7+),
emit { type: "adaptive", display: "summarized" } by default.
- For older adaptive-thinking models (Opus 4.6, Sonnet 4.6+) that
reject the field, keep emitting just { type: "adaptive" }.
- For budget-based Claude models, always set display.
- Expose BedrockOptions.thinkingDisplay ("summarized" | "omitted")
so callers can opt out, and wire hideThinkingSummary into the
bedrock-converse-stream case in stream.ts.
Fixes#1373
roboomp
ee9deba239