path: root/libpanto-go/panto.go

package panto

/*
#cgo CFLAGS: -I../libpanto-c/include
#cgo LDFLAGS: -L../libpanto-c/zig-out/lib -lpanto
#include <panto.h>
#include <stdlib.h>
*/
import "C"

import (
	"errors"
	"fmt"
	"iter"
	"runtime"
	"unsafe"
)

type APIStyle int
type ReasoningEffort int
type Thinking int
type Effort int
type MessageRole int
type ContentBlockTag int
type EventTag int
type SystemMode int

const (
	OpenAIChat APIStyle = iota
	AnthropicMessages
)
const (
	ReasoningDefault ReasoningEffort = iota
	ReasoningOff
	ReasoningMinimal
	ReasoningLow
	ReasoningMedium
	ReasoningHigh
)
const (
	ThinkingDisabled Thinking = iota
	ThinkingEnabled
	ThinkingAdaptive
)
const (
	EffortLow Effort = iota
	EffortMedium
	EffortHigh
	EffortXHigh
	EffortMax
)
const (
	RoleSystem MessageRole = iota
	RoleUser
	RoleAssistant
)
const (
	BlockText ContentBlockTag = iota
	BlockThinking
	BlockToolUse
	BlockToolResult
	BlockSystem
	BlockCompactionSummary
)
const (
	SystemAppend SystemMode = iota
	SystemReplace
)
const (
	EventMessageStart EventTag = iota
	EventBlockStart
	EventToolDetails
	EventContentDelta
	EventBlockComplete
	EventMessageComplete
	EventProviderRetry
	EventToolDispatchStart
	EventToolDispatchComplete
	EventTurnComplete
)

type Config struct {
	Provider   ProviderConfig
	Compaction CompactionConfig
	Retry      RetryConfig
}
type ProviderConfig struct {
	OpenAIChat        *OpenAIChatConfig
	AnthropicMessages *AnthropicMessagesConfig
}
type OpenAIChatConfig struct {
	APIKey, BaseURL, Model string
	Reasoning              ReasoningEffort
	MaxTokens              uint32
}
type AnthropicMessagesConfig struct {
	APIKey, BaseURL, Model, APIVersion string
	MaxTokens                          uint32
	Thinking                           Thinking
	Effort                             Effort
	ThinkingBudgetTokens               *uint32
	ThinkingInterleaved                bool
}
type CompactionConfig struct {
	KeepVerbatim     uint32
	Model            *ProviderConfig
	CompactionPrompt *string
}
type RetryConfig struct {
	MaxAttempts                uint
	InitialDelayMS, MaxDelayMS uint64
	Multiplier                 float64
	Jitter                     bool
}
type Usage struct{ Input, Output, CacheRead, CacheWrite, Reasoning uint64 }
type CompactionResult struct {
	Compacted                     bool
	KeptTurns, SummarizedMessages uint
}

type Event struct {
	Tag                  EventTag
	MessageStart         MessageRole
	BlockStart           BlockStart
	ToolDetails          ToolDetails
	ContentDelta         ContentDelta
	BlockComplete        BlockComplete
	MessageComplete      MessageComplete
	ProviderRetry        ProviderRetry
	ToolDispatchStart    ToolDispatchStart
	ToolDispatchComplete ToolDispatchComplete
}
type BlockStart struct {
	BlockType ContentBlockTag
	Index     uint
}
type ToolDetails struct {
	Index    uint
	ID, Name string
}
type ContentDelta struct {
	Index uint
	Delta string
}
type BlockComplete struct {
	Index     uint
	BlockType ContentBlockTag
}
type MessageComplete struct{ Usage *Usage }
type ProviderRetry struct {
	Attempt, MaxAttempts uint
	DelayMS              uint64
	ErrorName            string
	StatusCode           *uint16
	RetryAfterMS         *uint64
	Message              string
	Compaction           bool
}
type ToolDispatchStart struct{ Count uint }
type ToolDispatchComplete struct{ MessageIndex uint }

type Agent struct{ ptr *C.PantoAgent }
type Stream struct {
	ptr  *C.PantoStream
	err  error
	done bool
}
type Conversation struct {
	ptr   *C.PantoConversation
	owned bool
}
type Session struct{ ptr *C.PantoSession }
type SessionInfo struct {
	ID, Created, Modified, LastUserMessage, BaseURL, Model string
	MessageCount                                           uint
	APIStyle                                               APIStyle
	Reasoning                                              ReasoningEffort
}

type SessionStore interface {
	cptr() *C.PantoSessionStore
	Close()
}
type NullStore struct{ ptr *C.PantoSessionStore }
type FileSystemJSONLStore struct{ ptr *C.PantoSessionStore }

type cStrings []*C.char

func (cs cStrings) free() {
	for _, s := range cs {
		C.free(unsafe.Pointer(s))
	}
}
func Init()   { C.panto_init() }
func Deinit() { C.panto_deinit() }
func lastError() error {
	s := C.panto_last_error()
	if s.ptr == nil || s.len == 0 {
		return errors.New("libpanto error")
	}
	return errors.New(C.GoStringN((*C.char)(unsafe.Pointer(s.ptr)), C.int(s.len)))
}

func NewNullStore() (*NullStore, error) {
	var out *C.PantoSessionStore
	if C.panto_null_store_create(&out) != C.PANTO_OK {
		return nil, lastError()
	}
	s := &NullStore{out}
	runtime.SetFinalizer(s, (*NullStore).Close)
	return s, nil
}
func (s *NullStore) cptr() *C.PantoSessionStore { return s.ptr }
func (s *NullStore) Close() {
	if s != nil && s.ptr != nil {
		C.panto_session_store_destroy(s.ptr)
		s.ptr = nil
	}
}
func NewFileSystemJSONLStore(dir, metadata string) (*FileSystemJSONLStore, error) {
	cd := C.CString(dir)
	defer C.free(unsafe.Pointer(cd))
	cm := C.CString(metadata)
	defer C.free(unsafe.Pointer(cm))
	var out *C.PantoSessionStore
	if C.panto_file_system_jsonl_store_create(cd, cm, &out) != C.PANTO_OK {
		return nil, lastError()
	}
	s := &FileSystemJSONLStore{out}
	runtime.SetFinalizer(s, (*FileSystemJSONLStore).Close)
	return s, nil
}
func (s *FileSystemJSONLStore) cptr() *C.PantoSessionStore { return s.ptr }
func (s *FileSystemJSONLStore) Close() {
	if s != nil && s.ptr != nil {
		C.panto_session_store_destroy(s.ptr)
		s.ptr = nil
	}
}

func CreateSession(store SessionStore) (*Session, error) {
	var out *C.PantoSession
	if C.panto_session_store_create_session(store.cptr(), &out) != C.PANTO_OK {
		return nil, lastError()
	}
	s := &Session{out}
	runtime.SetFinalizer(s, (*Session).Close)
	return s, nil
}
func ResolveSession(store SessionStore, id string) (*Session, bool, error) {
	cid := C.CString(id)
	defer C.free(unsafe.Pointer(cid))
	var r C.PantoSessionResult
	if C.panto_session_store_resolve(store.cptr(), cid, &r) != C.PANTO_OK {
		return nil, false, lastError()
	}
	if !bool(r.found) {
		return nil, false, nil
	}
	s := &Session{r.session}
	runtime.SetFinalizer(s, (*Session).Close)
	return s, true, nil
}
func LatestSession(store SessionStore) (*Session, bool, error) {
	var r C.PantoSessionResult
	if C.panto_session_store_latest(store.cptr(), &r) != C.PANTO_OK {
		return nil, false, lastError()
	}
	if !bool(r.found) {
		return nil, false, nil
	}
	s := &Session{r.session}
	runtime.SetFinalizer(s, (*Session).Close)
	return s, true, nil
}
func ListSessions(store SessionStore) ([]SessionInfo, error) {
	var l C.PantoSessionInfoList
	if C.panto_session_store_list(store.cptr(), &l) != C.PANTO_OK {
		return nil, lastError()
	}
	defer C.panto_session_info_list_destroy(l)
	out := make([]SessionInfo, int(l.len))
	if l.ptr != nil {
		xs := unsafe.Slice(l.ptr, int(l.len))
		for i, x := range xs {
			out[i] = sessionInfo(x)
		}
	}
	return out, nil
}
func (s *Session) Close() {
	if s != nil && s.ptr != nil {
		C.panto_session_destroy(s.ptr)
		s.ptr = nil
	}
}
func (s *Session) Load() (*Conversation, error) {
	var out *C.PantoConversation
	if C.panto_session_load(s.ptr, &out) != C.PANTO_OK {
		return nil, lastError()
	}
	c := &Conversation{ptr: out, owned: true}
	runtime.SetFinalizer(c, (*Conversation).Close)
	return c, nil
}

func NewConversation() (*Conversation, error) {
	var out *C.PantoConversation
	if C.panto_conversation_create(&out) != C.PANTO_OK {
		return nil, lastError()
	}
	c := &Conversation{ptr: out, owned: true}
	runtime.SetFinalizer(c, (*Conversation).Close)
	return c, nil
}
func (c *Conversation) Close() {
	if c != nil && c.owned && c.ptr != nil {
		C.panto_conversation_destroy(c.ptr)
		c.ptr = nil
	}
}
func (c *Conversation) MessageCount() uint     { return uint(C.panto_conversation_message_count(c.ptr)) }
func (c *Conversation) Message(i uint) Message { return Message{conv: c, index: i} }
func (c *Conversation) AddSystemMessage(text string) error {
	ct := C.CString(text)
	defer C.free(unsafe.Pointer(ct))
	if C.panto_conversation_add_system_message(c.ptr, ct) != C.PANTO_OK {
		return lastError()
	}
	return nil
}
func (c *Conversation) ReplaceSystemMessage(text string) error {
	ct := C.CString(text)
	defer C.free(unsafe.Pointer(ct))
	if C.panto_conversation_replace_system_message(c.ptr, ct) != C.PANTO_OK {
		return lastError()
	}
	return nil
}
func (c *Conversation) AddUserText(text string) error {
	ct := C.CString(text)
	defer C.free(unsafe.Pointer(ct))
	if C.panto_conversation_add_user_text(c.ptr, ct) != C.PANTO_OK {
		return lastError()
	}
	return nil
}
func (c *Conversation) AddAssistantText(text string, u *Usage) error {
	ct := C.CString(text)
	defer C.free(unsafe.Pointer(ct))
	var cu C.PantoUsage
	has := false
	if u != nil {
		cu = cUsage(*u)
		has = true
	}
	if C.panto_conversation_add_assistant_text(c.ptr, ct, C.bool(has), cu) != C.PANTO_OK {
		return lastError()
	}
	return nil
}
func (c *Conversation) AddCompactionSummary(text string) error {
	ct := C.CString(text)
	defer C.free(unsafe.Pointer(ct))
	if C.panto_conversation_add_compaction_summary(c.ptr, ct) != C.PANTO_OK {
		return lastError()
	}
	return nil
}

type Message struct {
	conv  *Conversation
	index uint
}

func (m Message) Role() MessageRole {
	return MessageRole(C.panto_conversation_message_role(m.conv.ptr, C.size_t(m.index)))
}
func (m Message) Usage() *Usage {
	if !bool(C.panto_conversation_message_has_usage(m.conv.ptr, C.size_t(m.index))) {
		return nil
	}
	u := usage(C.panto_conversation_message_usage(m.conv.ptr, C.size_t(m.index)))
	return &u
}
func (m Message) BlockCount() uint {
	return uint(C.panto_conversation_message_block_count(m.conv.ptr, C.size_t(m.index)))
}
func (m Message) Block(i uint) ContentBlock {
	return ContentBlock{conv: m.conv, msg: m.index, index: i}
}

type ContentBlock struct {
	conv       *Conversation
	msg, index uint
}

func (b ContentBlock) Tag() ContentBlockTag {
	return ContentBlockTag(C.panto_conversation_block_tag(b.conv.ptr, C.size_t(b.msg), C.size_t(b.index)))
}
func (b ContentBlock) Text() string {
	return goSlice(C.panto_conversation_block_text(b.conv.ptr, C.size_t(b.msg), C.size_t(b.index)))
}
func (b ContentBlock) ToolID() string {
	return goSlice(C.panto_conversation_block_tool_id(b.conv.ptr, C.size_t(b.msg), C.size_t(b.index)))
}
func (b ContentBlock) ToolName() string {
	return goSlice(C.panto_conversation_block_tool_name(b.conv.ptr, C.size_t(b.msg), C.size_t(b.index)))
}
func (b ContentBlock) ToolResultIsError() bool {
	return bool(C.panto_conversation_block_tool_result_is_error(b.conv.ptr, C.size_t(b.msg), C.size_t(b.index)))
}
func (b ContentBlock) SystemMode() SystemMode {
	return SystemMode(C.panto_conversation_block_system_mode(b.conv.ptr, C.size_t(b.msg), C.size_t(b.index)))
}

func NewAgent(cfg Config) (*Agent, error) {
	st, err := NewNullStore()
	if err != nil {
		return nil, err
	}
	sess, err := CreateSession(st)
	st.Close()
	if err != nil {
		return nil, err
	}
	return NewAgentWithSession(cfg, sess, nil)
}
func NewAgentWithSession(cfg Config, session *Session, conv *Conversation) (*Agent, error) {
	ccfg, strings, err := cfg.c()
	if err != nil {
		return nil, err
	}
	defer strings.free()
	var cconv *C.PantoConversation
	if conv != nil {
		cconv = conv.ptr
		conv.owned = false
		runtime.SetFinalizer(conv, nil)
	}
	var out *C.PantoAgent
	if C.panto_agent_create(&ccfg, session.ptr, cconv, &out) != C.PANTO_OK {
		return nil, lastError()
	}
	a := &Agent{out}
	runtime.SetFinalizer(a, (*Agent).Close)
	return a, nil
}
func (a *Agent) Close() {
	if a != nil && a.ptr != nil {
		C.panto_agent_destroy(a.ptr)
		a.ptr = nil
	}
}
func (a *Agent) SessionID() string { return goSlice(C.panto_agent_session_id(a.ptr)) }
func (a *Agent) Conversation() *Conversation {
	return &Conversation{ptr: C.panto_agent_conversation(a.ptr), owned: false}
}
func (a *Agent) SetConfig(cfg Config) error {
	ccfg, strings, err := cfg.c()
	if err != nil {
		return err
	}
	defer strings.free()
	if C.panto_agent_set_config(a.ptr, &ccfg) != C.PANTO_OK {
		return lastError()
	}
	return nil
}
func (a *Agent) Compact(overrideSystemPrompt, extraInstructions *string) (CompactionResult, error) {
	var co, ce *C.char
	if overrideSystemPrompt != nil {
		co = C.CString(*overrideSystemPrompt)
		defer C.free(unsafe.Pointer(co))
	}
	if extraInstructions != nil {
		ce = C.CString(*extraInstructions)
		defer C.free(unsafe.Pointer(ce))
	}
	var out C.PantoCompactionResult
	if C.panto_agent_compact(a.ptr, co, ce, &out) != C.PANTO_OK {
		return CompactionResult{}, lastError()
	}
	return CompactionResult{Compacted: bool(out.compacted), KeptTurns: uint(out.kept_turns), SummarizedMessages: uint(out.summarized_messages)}, nil
}
func (a *Agent) Run(userText string) (*Stream, error) {
	ct := C.CString(userText)
	defer C.free(unsafe.Pointer(ct))
	var out *C.PantoStream
	if C.panto_agent_run(a.ptr, ct, &out) != C.PANTO_OK {
		return nil, lastError()
	}
	s := &Stream{ptr: out}
	runtime.SetFinalizer(s, (*Stream).Close)
	return s, nil
}
func (a *Agent) AddSystemMessage(text string) error {
	ct := C.CString(text)
	defer C.free(unsafe.Pointer(ct))
	if C.panto_agent_add_system_message(a.ptr, ct) != C.PANTO_OK {
		return lastError()
	}
	return nil
}
func (a *Agent) SetSystemPrompt(text string) error {
	ct := C.CString(text)
	defer C.free(unsafe.Pointer(ct))
	if C.panto_agent_set_system_prompt(a.ptr, ct) != C.PANTO_OK {
		return lastError()
	}
	return nil
}

func (s *Stream) Close() {
	if s != nil && s.ptr != nil {
		C.panto_stream_destroy(s.ptr)
		s.ptr = nil
	}
}
func (s *Stream) Next() (Event, bool, error) {
	if s.err != nil {
		return Event{}, false, s.err
	}
	if s.done {
		return Event{}, false, nil
	}
	var cev C.PantoEvent
	status := C.panto_stream_next(s.ptr, &cev)
	switch status {
	case C.PANTO_NEXT_EVENT:
		defer C.panto_event_free(&cev)
		ev := marshalEvent(&cev)
		if ev.Tag == EventTurnComplete {
			s.done = true
		}
		return ev, true, nil
	case C.PANTO_NEXT_DONE:
		s.done = true
		return Event{}, false, nil
	case C.PANTO_NEXT_ERROR:
		s.err = lastError()
		return Event{}, false, s.err
	default:
		s.err = fmt.Errorf("unknown panto next status %d", int(status))
		return Event{}, false, s.err
	}
}
func (s *Stream) Err() error { return s.err }
func (s *Stream) Iter() iter.Seq[Event] {
	return func(yield func(Event) bool) {
		for {
			ev, ok, err := s.Next()
			if err != nil || !ok {
				return
			}
			if !yield(ev) {
				return
			}
			if ev.Tag == EventTurnComplete {
				return
			}
		}
	}
}
func (s *Stream) Chan() <-chan Event {
	ch := make(chan Event)
	go func() {
		defer close(ch)
		for ev := range s.Iter() {
			ch <- ev
		}
	}()
	return ch
}

func (cfg Config) c() (C.PantoConfig, cStrings, error) {
	var cs cStrings
	provider, pstrings, err := cfg.Provider.c()
	cs = append(cs, pstrings...)
	if err != nil {
		cs.free()
		return C.PantoConfig{}, nil, err
	}
	out := C.PantoConfig{provider: provider}
	out.compaction.keep_verbatim = C.uint32_t(cfg.Compaction.KeepVerbatim)
	if cfg.Compaction.Model != nil {
		m, ms, err := cfg.Compaction.Model.c()
		cs = append(cs, ms...)
		if err != nil {
			cs.free()
			return C.PantoConfig{}, nil, err
		}
		out.compaction.has_model = true
		out.compaction.model = m
	}
	if cfg.Compaction.CompactionPrompt != nil {
		c := C.CString(*cfg.Compaction.CompactionPrompt)
		cs = append(cs, c)
		out.compaction.has_compaction_prompt = true
		out.compaction.compaction_prompt = c
	}
	out.retry.max_attempts = C.size_t(cfg.Retry.MaxAttempts)
	out.retry.initial_delay_ms = C.uint64_t(cfg.Retry.InitialDelayMS)
	out.retry.max_delay_ms = C.uint64_t(cfg.Retry.MaxDelayMS)
	out.retry.multiplier = C.double(cfg.Retry.Multiplier)
	out.retry.jitter = C.bool(cfg.Retry.Jitter)
	return out, cs, nil
}
func (p ProviderConfig) c() (C.PantoProviderConfig, cStrings, error) {
	var out C.PantoProviderConfig
	var cs cStrings
	if p.OpenAIChat != nil == (p.AnthropicMessages != nil) {
		return out, nil, errors.New("exactly one provider config must be set")
	}
	if p.OpenAIChat != nil {
		out.tag = C.PANTO_OPENAI_CHAT
		setOpenAI(&out, p.OpenAIChat, &cs)
		return out, cs, nil
	}
	out.tag = C.PANTO_ANTHROPIC_MESSAGES
	setAnthropic(&out, p.AnthropicMessages, &cs)
	return out, cs, nil
}
func setOpenAI(out *C.PantoProviderConfig, cfg *OpenAIChatConfig, cs *cStrings) {
	apiKey, baseURL, model := C.CString(cfg.APIKey), C.CString(cfg.BaseURL), C.CString(cfg.Model)
	*cs = append(*cs, apiKey, baseURL, model)
	c := (*C.PantoOpenAIChatConfig)(unsafe.Pointer(&out.data[0]))
	c.api_key = apiKey
	c.base_url = baseURL
	c.model = model
	c.reasoning = C.PantoReasoningEffort(cfg.Reasoning)
	c.max_tokens = C.uint32_t(cfg.MaxTokens)
}
func setAnthropic(out *C.PantoProviderConfig, cfg *AnthropicMessagesConfig, cs *cStrings) {
	apiKey, baseURL, model, ver := C.CString(cfg.APIKey), C.CString(cfg.BaseURL), C.CString(cfg.Model), C.CString(cfg.APIVersion)
	*cs = append(*cs, apiKey, baseURL, model, ver)
	c := (*C.PantoAnthropicMessagesConfig)(unsafe.Pointer(&out.data[0]))
	c.api_key = apiKey
	c.base_url = baseURL
	c.model = model
	c.api_version = ver
	c.max_tokens = C.uint32_t(cfg.MaxTokens)
	c.thinking = C.PantoThinking(cfg.Thinking)
	c.effort = C.PantoEffort(cfg.Effort)
	c.thinking_interleaved = C.bool(cfg.ThinkingInterleaved)
	if cfg.ThinkingBudgetTokens != nil {
		c.has_thinking_budget_tokens = true
		c.thinking_budget_tokens = C.uint32_t(*cfg.ThinkingBudgetTokens)
	}
}

func marshalEvent(cev *C.PantoEvent) Event {
	ev := Event{Tag: EventTag(cev.tag)}
	switch cev.tag {
	case C.PANTO_EVENT_MESSAGE_START:
		ev.MessageStart = MessageRole(*(*C.PantoMessageRole)(unsafe.Pointer(&cev.data[0])))
	case C.PANTO_EVENT_BLOCK_START:
		b := (*C.PantoBlockStart)(unsafe.Pointer(&cev.data[0]))
		ev.BlockStart = BlockStart{BlockType: ContentBlockTag(b.block_type), Index: uint(b.index)}
	case C.PANTO_EVENT_TOOL_DETAILS:
		t := (*C.PantoToolDetails)(unsafe.Pointer(&cev.data[0]))
		ev.ToolDetails = ToolDetails{Index: uint(t.index), ID: goSlice(t.id), Name: goSlice(t.name)}
	case C.PANTO_EVENT_CONTENT_DELTA:
		d := (*C.PantoContentDelta)(unsafe.Pointer(&cev.data[0]))
		ev.ContentDelta = ContentDelta{Index: uint(d.index), Delta: goSlice(d.delta)}
	case C.PANTO_EVENT_BLOCK_COMPLETE:
		b := (*C.PantoBlockComplete)(unsafe.Pointer(&cev.data[0]))
		ev.BlockComplete = BlockComplete{Index: uint(b.index), BlockType: ContentBlockTag(b.block_type)}
	case C.PANTO_EVENT_MESSAGE_COMPLETE:
		m := (*C.PantoMessageComplete)(unsafe.Pointer(&cev.data[0]))
		if m.has_usage {
			u := usage(m.usage)
			ev.MessageComplete.Usage = &u
		}
	case C.PANTO_EVENT_PROVIDER_RETRY:
		r := (*C.PantoProviderRetry)(unsafe.Pointer(&cev.data[0]))
		ev.ProviderRetry = ProviderRetry{Attempt: uint(r.attempt), MaxAttempts: uint(r.max_attempts), DelayMS: uint64(r.delay_ms), ErrorName: goSlice(r.error_name), Message: goSlice(r.message), Compaction: bool(r.compaction)}
		if r.has_status_code {
			v := uint16(r.status_code)
			ev.ProviderRetry.StatusCode = &v
		}
		if r.has_retry_after_ms {
			v := uint64(r.retry_after_ms)
			ev.ProviderRetry.RetryAfterMS = &v
		}
	case C.PANTO_EVENT_TOOL_DISPATCH_START:
		t := (*C.PantoToolDispatchStart)(unsafe.Pointer(&cev.data[0]))
		ev.ToolDispatchStart = ToolDispatchStart{Count: uint(t.count)}
	case C.PANTO_EVENT_TOOL_DISPATCH_COMPLETE:
		t := (*C.PantoToolDispatchComplete)(unsafe.Pointer(&cev.data[0]))
		ev.ToolDispatchComplete = ToolDispatchComplete{MessageIndex: uint(t.message_index)}
	}
	return ev
}
func goSlice(s C.PantoSlice) string {
	if s.ptr == nil || s.len == 0 {
		return ""
	}
	return C.GoStringN((*C.char)(unsafe.Pointer(s.ptr)), C.int(s.len))
}
func usage(u C.PantoUsage) Usage {
	return Usage{Input: uint64(u.input), Output: uint64(u.output), CacheRead: uint64(u.cache_read), CacheWrite: uint64(u.cache_write), Reasoning: uint64(u.reasoning)}
}
func cUsage(u Usage) C.PantoUsage {
	return C.PantoUsage{input: C.uint64_t(u.Input), output: C.uint64_t(u.Output), cache_read: C.uint64_t(u.CacheRead), cache_write: C.uint64_t(u.CacheWrite), reasoning: C.uint64_t(u.Reasoning)}
}
func sessionInfo(i C.PantoSessionInfo) SessionInfo {
	return SessionInfo{ID: goSlice(i.id), Created: goSlice(i.created), Modified: goSlice(i.modified), LastUserMessage: goSlice(i.last_user_message), BaseURL: goSlice(i.base_url), Model: goSlice(i.model), MessageCount: uint(i.message_count), APIStyle: APIStyle(i.api_style), Reasoning: ReasoningEffort(i.reasoning)}
}