fix(aibridge): support Bedrock Opus 4.8 adaptive thinking (#26691) - #26707
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Bedrock rejects legacy `thinking.type=enabled` requests for Claude Opus 4.8 because the model requires adaptive thinking. The AI Bridge Bedrock shim only recognized Opus 4.7 as adaptive-only, so Opus 4.8 requests could fall through and produce Bedrock 400 responses. Add Opus 4.8 to the adaptive-only model detection and cover the regional Bedrock model ID form with a regression test. <details> <summary>Coder Agents disclosure</summary> This PR was generated by Coder Agents on behalf of @ericpaulsen. </details> (cherry picked from commit 96aecd8)
f0ssel
approved these changes
Jun 27, 2026
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Bedrock rejects legacy
thinking.type=enabledrequests for Claude Opus 4.8 because the model requires adaptive thinking. The AI Bridge Bedrock shim only recognized Opus 4.7 as adaptive-only, so Opus 4.8 requests could fall through and produce Bedrock 400 responses.Add Opus 4.8 to the adaptive-only model detection and cover the regional Bedrock model ID form with a regression test.
Coder Agents disclosure
This PR was generated by Coder Agents on behalf of @ericpaulsen.
(cherry picked from commit 96aecd8)