steve
cbaf41f50c
Introduces an opt-in level-based reasoning toggle (low/medium/high) that each provider translates to its native parameter: - Anthropic: thinking.budget_tokens (1024/8000/24000), with temperature forced to default and MaxTokens auto-grown above the budget. - OpenAI/xAI/Groq via openaicompat: reasoning_effort string, gated by a new Rules.SupportsReasoning predicate so non-reasoning models don't receive the parameter. xAI uses Rules.MapReasoningEffort to remap "medium" to "high" since its API only accepts low|high. - Google: thinking_config.thinking_budget + include_thoughts:true. - DeepSeek: SupportsReasoning=false (reasoner is always-on; the reasoning_content trace was already extracted via openaicompat). Reasoning content is surfaced as Response.Thinking on Complete and as StreamEventThinking deltas during streaming. Provider-side: extracted from Anthropic thinking content blocks, Google's part.Thought=true parts, and the non-standard reasoning_content field that DeepSeek and Groq emit (parsed out of raw JSON since openai-go doesn't type it). Public API: - llm.ReasoningLevel + ReasoningLow/Medium/High constants - llm.WithReasoning(level) request option - Model.WithReasoning(level) for baked-in defaults - provider.Request.Reasoning, provider.Response.Thinking - provider.StreamEventThinking Tests cover Rules-based gating, MapReasoningEffort, reasoning_content extraction (Complete + Stream), Anthropic budget mapping, and temperature suppression when thinking is enabled. Existing behavior is unchanged when Reasoning is the empty string. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>