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fix(ai): signature support for non-Anthropic models in Amazon Bedrock provider (#727)

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* Add Amazon Bedrock models test suite for agent package

Tests basic prompts, multi-turn conversations with thinking, and
synthetic thinking signatures across all Bedrock models.

Known issues are categorized and skipped:
- Models requiring inference profile (5)
- Invalid model IDs for us-east-1 region (6)
- Max tokens config exceeds model limit (2)
- No signature support in reasoningContent (10)
- Rejects reasoning content in user messages (25)
- Validates signature format - Anthropic newer models (7)

* Fix Bedrock signature support for non-Anthropic models

Only include the signature field in reasoningContent.reasoningText for
Anthropic Claude models. Other models (OpenAI, Qwen, Minimax, Moonshot,
etc.) reject this field with:
"This model doesn't support the reasoningContent.reasoningText.signature field"

This fix enables multi-turn conversations with thinking content for
10 additional Bedrock models that previously failed.

https://buildwithpi.ai/session?7e39c05f66ea358da3f993c267fe3e29

* Add a CHANGELOG entry
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Burak Varlı 2026-01-14 18:21:35 +00:00 • committed by GitHub
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packages/ai/CHANGELOG.md
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@ -2,6 +2,10 @@
## [Unreleased]
### Fixed
- Fixed signature support for non-Anthropic models in Amazon Bedrock provider ([#727](https://github.com/badlogic/pi-mono/pull/727) by [@unexge](https://github.com/unexge))
## [0.45.7] - 2026-01-13
### Fixed