Function convertAutoToMidRange

internal/thinking/validate.go:177–211

convertAutoToMidRange converts ModeAuto to a mid-range value when dynamic is not allowed. This function handles the case where a model does not support dynamic/auto thinking. The auto mode is silently converted to a fixed value based on model capability: - Level-only models: convert to ModeLevel wi

(config ThinkingConfig, support *registry.ThinkingSupport, provider, model string)

//   - Debug level when conversion occurs
//   - Fields: original_mode, clamped_to, reason
func convertAutoToMidRange(config ThinkingConfig, support *registry.ThinkingSupport, provider, model string) ThinkingConfig {
	// For level-only models (has Levels but no Min/Max range), use ModeLevel with medium
	if len(support.Levels) > 0 && support.Min == 0 && support.Max == 0 {
		config.Mode = ModeLevel
		config.Level = LevelMedium
		config.Budget = 0
		log.WithFields(log.Fields{
			"provider":      provider,
			"model":         model,
			"original_mode": "auto",
			"clamped_to":    string(LevelMedium),
		}).Debug("thinking: mode converted, dynamic not allowed, using medium level |")
		return config
	}

	// For budget models, use mid-range budget
	mid := (support.Min + support.Max) / 2
	if mid <= 0 && support.ZeroAllowed {
		config.Mode = ModeNone
		config.Budget = 0
	} else if mid <= 0 {
		config.Mode = ModeBudget
		config.Budget = support.Min
	} else {
		config.Mode = ModeBudget
		config.Budget = mid
	}
	log.WithFields(log.Fields{
		"provider":      provider,
		"model":         model,
		"original_mode": "auto",
		"clamped_to":    config.Budget,
	}).Debug("thinking: mode converted, dynamic not allowed |")
	return config
}

// standardLevelOrder defines the canonical ordering of thinking levels from lowest to highest.
var standardLevelOrder = []ThinkingLevel{LevelMinimal, LevelLow, LevelMedium, LevelHigh, LevelXHigh, LevelMax}