refactor: change provider options structs to be private / internal

These struct types don't make sense to be part of the public API. They
are only used internally to map options to the actual provider SDKs.

Author: andreynering

providers/anthropic/anthropic.go

@@ -16,30 +16,6 @@ import (
 	"github.com/charmbracelet/ai"
 )
 
-type ProviderOptions struct {
-	SendReasoning          *bool                   `json:"send_reasoning,omitempty"`
-	Thinking               *ThinkingProviderOption `json:"thinking,omitempty"`
-	DisableParallelToolUse *bool                   `json:"disable_parallel_tool_use,omitempty"`
-}
-
-type ThinkingProviderOption struct {
-	BudgetTokens int64 `json:"budget_tokens"`
-}
-
-type ReasoningMetadata struct {
-	Signature    string `json:"signature"`
-	RedactedData string `json:"redacted_data"`
-}
-
-type CacheControlProviderOptions struct {
-	Type string `json:"type"`
-}
-type FilePartProviderOptions struct {
-	EnableCitations bool   `json:"enable_citations"`
-	Title           string `json:"title"`
-	Context         string `json:"context"`
-}
-
 type options struct {
 	baseURL string
 	apiKey  string
@@ -147,7 +123,7 @@ func (a languageModel) Provider() string {
 
 func (a languageModel) prepareParams(call ai.Call) (*anthropic.MessageNewParams, []ai.CallWarning, error) {
 	params := &anthropic.MessageNewParams{}
-	providerOptions := &ProviderOptions{}
+	providerOptions := &providerOptions{}
 	if v, ok := call.ProviderOptions["anthropic"]; ok {
 		err := ai.ParseOptions(v, providerOptions)
 		if err != nil {
@@ -246,19 +222,19 @@ func (a languageModel) prepareParams(call ai.Call) (*anthropic.MessageNewParams,
 	return params, warnings, nil
 }
 
-func getCacheControl(providerOptions ai.ProviderOptions) *CacheControlProviderOptions {
+func getCacheControl(providerOptions ai.ProviderOptions) *cacheControlProviderOptions {
 	if anthropicOptions, ok := providerOptions["anthropic"]; ok {
 		if cacheControl, ok := anthropicOptions["cache_control"]; ok {
 			if cc, ok := cacheControl.(map[string]any); ok {
-				cacheControlOption := &CacheControlProviderOptions{}
+				cacheControlOption := &cacheControlProviderOptions{}
 				err := ai.ParseOptions(cc, cacheControlOption)
 				if err != nil {
 					return cacheControlOption
 				}
 			}
 		} else if cacheControl, ok := anthropicOptions["cacheControl"]; ok {
 			if cc, ok := cacheControl.(map[string]any); ok {
-				cacheControlOption := &CacheControlProviderOptions{}
+				cacheControlOption := &cacheControlProviderOptions{}
 				err := ai.ParseOptions(cc, cacheControlOption)
 				if err != nil {
 					return cacheControlOption
@@ -269,9 +245,9 @@ func getCacheControl(providerOptions ai.ProviderOptions) *CacheControlProviderOp
 	return nil
 }
 
-func getReasoningMetadata(providerOptions ai.ProviderOptions) *ReasoningMetadata {
+func getReasoningMetadata(providerOptions ai.ProviderOptions) *reasoningMetadata {
 	if anthropicOptions, ok := providerOptions["anthropic"]; ok {
-		reasoningMetadata := &ReasoningMetadata{}
+		reasoningMetadata := &reasoningMetadata{}
 		err := ai.ParseOptions(anthropicOptions, reasoningMetadata)
 		if err != nil {
 			return reasoningMetadata

providers/anthropic/provider_options.go

@@ -0,0 +1,26 @@
+package anthropic
+
+type providerOptions struct {
+	SendReasoning          *bool                   `json:"send_reasoning,omitempty"`
+	Thinking               *thinkingProviderOption `json:"thinking,omitempty"`
+	DisableParallelToolUse *bool                   `json:"disable_parallel_tool_use,omitempty"`
+}
+
+type thinkingProviderOption struct {
+	BudgetTokens int64 `json:"budget_tokens"`
+}
+
+type reasoningMetadata struct {
+	Signature    string `json:"signature"`
+	RedactedData string `json:"redacted_data"`
+}
+
+type cacheControlProviderOptions struct {
+	Type string `json:"type"`
+}
+
+type filePartProviderOptions struct {
+	EnableCitations bool   `json:"enable_citations"`
+	Title           string `json:"title"`
+	Context         string `json:"context"`
+}

providers/openai/openai.go

@@ -19,33 +19,6 @@ import (
 	"github.com/openai/openai-go/v2/shared"
 )
 
-type ReasoningEffort string
-
-const (
-	ReasoningEffortMinimal ReasoningEffort = "minimal"
-	ReasoningEffortLow     ReasoningEffort = "low"
-	ReasoningEffortMedium  ReasoningEffort = "medium"
-	ReasoningEffortHigh    ReasoningEffort = "high"
-)
-
-type ProviderOptions struct {
-	LogitBias           map[string]int64 `json:"logit_bias"`
-	LogProbs            *bool            `json:"log_probes"`
-	TopLogProbs         *int64           `json:"top_log_probs"`
-	ParallelToolCalls   *bool            `json:"parallel_tool_calls"`
-	User                *string          `json:"user"`
-	ReasoningEffort     *ReasoningEffort `json:"reasoning_effort"`
-	MaxCompletionTokens *int64           `json:"max_completion_tokens"`
-	TextVerbosity       *string          `json:"text_verbosity"`
-	Prediction          map[string]any   `json:"prediction"`
-	Store               *bool            `json:"store"`
-	Metadata            map[string]any   `json:"metadata"`
-	PromptCacheKey      *string          `json:"prompt_cache_key"`
-	SafetyIdentifier    *string          `json:"safety_identifier"`
-	ServiceTier         *string          `json:"service_tier"`
-	StructuredOutputs   *bool            `json:"structured_outputs"`
-}
-
 type provider struct {
 	options options
 }
@@ -179,7 +152,7 @@ func (o languageModel) Provider() string {
 func (o languageModel) prepareParams(call ai.Call) (*openai.ChatCompletionNewParams, []ai.CallWarning, error) {
 	params := &openai.ChatCompletionNewParams{}
 	messages, warnings := toPrompt(call.Prompt)
-	providerOptions := &ProviderOptions{}
+	providerOptions := &providerOptions{}
 	if v, ok := call.ProviderOptions["openai"]; ok {
 		err := ai.ParseOptions(v, providerOptions)
 		if err != nil {
@@ -273,13 +246,13 @@ func (o languageModel) prepareParams(call ai.Call) (*openai.ChatCompletionNewPar
 
 	if providerOptions.ReasoningEffort != nil {
 		switch *providerOptions.ReasoningEffort {
-		case ReasoningEffortMinimal:
+		case reasoningEffortMinimal:
 			params.ReasoningEffort = shared.ReasoningEffortMinimal
-		case ReasoningEffortLow:
+		case reasoningEffortLow:
 			params.ReasoningEffort = shared.ReasoningEffortLow
-		case ReasoningEffortMedium:
+		case reasoningEffortMedium:
 			params.ReasoningEffort = shared.ReasoningEffortMedium
-		case ReasoningEffortHigh:
+		case reasoningEffortHigh:
 			params.ReasoningEffort = shared.ReasoningEffortHigh
 		default:
 			return nil, nil, fmt.Errorf("reasoning model `%s` not supported", *providerOptions.ReasoningEffort)

providers/openai/provider_options.go

@@ -0,0 +1,28 @@
+package openai
+
+type reasoningEffort string
+
+const (
+	reasoningEffortMinimal reasoningEffort = "minimal"
+	reasoningEffortLow     reasoningEffort = "low"
+	reasoningEffortMedium  reasoningEffort = "medium"
+	reasoningEffortHigh    reasoningEffort = "high"
+)
+
+type providerOptions struct {
+	LogitBias           map[string]int64 `json:"logit_bias"`
+	LogProbs            *bool            `json:"log_probes"`
+	TopLogProbs         *int64           `json:"top_log_probs"`
+	ParallelToolCalls   *bool            `json:"parallel_tool_calls"`
+	User                *string          `json:"user"`
+	ReasoningEffort     *reasoningEffort `json:"reasoning_effort"`
+	MaxCompletionTokens *int64           `json:"max_completion_tokens"`
+	TextVerbosity       *string          `json:"text_verbosity"`
+	Prediction          map[string]any   `json:"prediction"`
+	Store               *bool            `json:"store"`
+	Metadata            map[string]any   `json:"metadata"`
+	PromptCacheKey      *string          `json:"prompt_cache_key"`
+	SafetyIdentifier    *string          `json:"safety_identifier"`
+	ServiceTier         *string          `json:"service_tier"`
+	StructuredOutputs   *bool            `json:"structured_outputs"`
+}