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[BUG] Prompt cache collapses to the system+tools floor on every resumed turn once the conversation exceeds ~80k tokens and >1 min has passed — 2.1.228+, Bedrock, Agent SDK headless #82439

[BUG] Prompt cache collapses to the system+tools floor on every resumed turn once the conversation exceeds ~80k tokens and >1 min has passed — 2.1.228+, Bedrock, Agent SDK headless

[BUG] Prompt cache collapses to the system+tools floor on every resumed turn once the conversation exceeds ~80k tokens and >1 min has passed — 2.1.228+, Bedrock, Agent SDK headless #82439

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succeeded Sep 1, 2026 in 2s