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@silversurfer562 silversurfer562 released this 04 Sep 02:29
v1.2.0
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Learn about vigilant mode.

The Fable 5.1 release: the canonical premium tier moves to claude-fable-5-1, and the faithfulness judge stops forcing tool_choice on fable models (a 400 on 5.1). No API surface changes; ATTUNE_MODEL_PREMIUM=claude-fable-5 keeps the previous default.

Changed

  • Premium tier moves to Claude Fable 5.1 (claude-fable-5-1) in the canonical attune_rag.model_tiers contract (mirrored byte-for-byte by attune-ai and attune-author, whose drift guards pin to this copy). claude-fable-5 stays a known ATTUNE_MODEL_PREMIUM override; the retention hint now reads claude-fable-* models require ....

Fixed

  • FaithfulnessJudge no longer forces tool_choice on fable models: Fable 5.1 returns 400 on forced tool use, which would have broken the default premium-tier judge. Fable models steer with tool_choice: auto and keep the schema guarantee through strict tool use (strict: true, additionalProperties: false on the report schema); every other model keeps the forced call.

Full changelog: https://github.com/Smart-AI-Memory/attune-rag/blob/main/CHANGELOG.md#120--2026-09-03

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