Function clampLevel

internal/thinking/validate.go:218–259

clampLevel clamps the given level to the nearest supported level. On tie, prefers the lower level.

(level ThinkingLevel, modelInfo *registry.ModelInfo, provider string)

// clampLevel clamps the given level to the nearest supported level.
// On tie, prefers the lower level.
func clampLevel(level ThinkingLevel, modelInfo *registry.ModelInfo, provider string) ThinkingLevel {
	model := "unknown"
	var supported []string
	if modelInfo != nil {
		if modelInfo.ID != "" {
			model = modelInfo.ID
		}
		if modelInfo.Thinking != nil {
			supported = modelInfo.Thinking.Levels
		}
	}

	if len(supported) == 0 || isLevelSupported(string(level), supported) {
		return level
	}

	pos := levelIndex(string(level))
	if pos == -1 {
		return level
	}
	bestIdx, bestDist := -1, len(standardLevelOrder)+1

	for _, s := range supported {
		if idx := levelIndex(strings.TrimSpace(s)); idx != -1 {
			if dist := abs(pos - idx); dist < bestDist || (dist == bestDist && idx < bestIdx) {
				bestIdx, bestDist = idx, dist
			}
		}
	}

	if bestIdx >= 0 {
		clamped := standardLevelOrder[bestIdx]
		log.WithFields(log.Fields{
			"provider":       provider,
			"model":          model,
			"original_value": string(level),
			"clamped_to":     string(clamped),
		}).Debug("thinking: level clamped |")
		return clamped
	}
	return level
}

// clampBudget clamps a budget value to the model's supported range.
func clampBudget(value int, modelInfo *registry.ModelInfo, provider string) int {