1package agent
2
3import (
4 "bufio"
5 "context"
6 "encoding/json"
7 "errors"
8 "fmt"
9 "io"
10 "os"
11 "os/signal"
12 "path/filepath"
13 "strings"
14 "sync"
15 "syscall"
16 "time"
17
18 "github.com/patriceckhart/zot/packages/agent/extensions"
19 "github.com/patriceckhart/zot/packages/agent/extproto"
20 "github.com/patriceckhart/zot/packages/agent/modes"
21 "github.com/patriceckhart/zot/packages/agent/skills"
22 "github.com/patriceckhart/zot/packages/agent/swarm"
23 "github.com/patriceckhart/zot/packages/agent/tools"
24 "github.com/patriceckhart/zot/packages/core"
25 "github.com/patriceckhart/zot/packages/provider"
26 "github.com/patriceckhart/zot/packages/provider/auth"
27 "github.com/patriceckhart/zot/packages/tui"
28)
29
30// interactiveExtHooks is a tiny adapter that lets the extension
31// manager call back into the Interactive instance built later in
32// runInteractive. The forward-declared *modes.Interactive is filled
33// in immediately after manager construction.
34type interactiveExtHooks struct {
35 ivPtr **modes.Interactive
36}
37
38func (h *interactiveExtHooks) iv() *modes.Interactive {
39 if h == nil || h.ivPtr == nil {
40 return nil
41 }
42 return *h.ivPtr
43}
44
45func (h *interactiveExtHooks) Notify(extName, level, message string) {
46 if iv := h.iv(); iv != nil {
47 iv.Notify(extName, level, message)
48 }
49}
50func (h *interactiveExtHooks) Submit(text string) {
51 if iv := h.iv(); iv != nil {
52 iv.SubmitOrQueue(text, nil)
53 }
54}
55func (h *interactiveExtHooks) SubmitSlash(text string) {
56 if iv := h.iv(); iv != nil {
57 iv.SubmitSlash(text)
58 }
59}
60func (h *interactiveExtHooks) Insert(text string) {
61 if iv := h.iv(); iv != nil {
62 iv.Insert(text)
63 }
64}
65func (h *interactiveExtHooks) Display(extName, text string) {
66 if iv := h.iv(); iv != nil {
67 iv.Display(extName, text)
68 }
69}
70func (h *interactiveExtHooks) ClearNotes(extName string) {
71 if iv := h.iv(); iv != nil {
72 iv.ClearNotes(extName)
73 }
74}
75func (h *interactiveExtHooks) OpenPanel(extName string, spec extproto.PanelSpec) {
76 if iv := h.iv(); iv != nil {
77 iv.OpenPanel(extName, spec)
78 }
79}
80func (h *interactiveExtHooks) UpdatePanel(extName, panelID, title string, lines []string, footer string) {
81 if iv := h.iv(); iv != nil {
82 iv.UpdatePanel(extName, panelID, title, lines, footer)
83 }
84}
85func (h *interactiveExtHooks) ClosePanel(extName, panelID string) {
86 if iv := h.iv(); iv != nil {
87 iv.ClosePanel(extName, panelID)
88 }
89}
90
91// extToolAdapter bridges *extensions.Manager to the
92// ExtensionToolSource interface declared in build.go (kept narrow to
93// avoid a build->extensions import cycle). One adapter instance per
94// run; used at every Resolve point so re-built agents pick up the
95// same set of extension tools.
96type extToolAdapter struct {
97 mgr *extensions.Manager
98}
99
100func (a *extToolAdapter) Tools() []ExtensionToolInfo {
101 infos := a.mgr.Tools()
102 out := make([]ExtensionToolInfo, len(infos))
103 for i, t := range infos {
104 out[i] = ExtensionToolInfo{
105 Extension: t.Extension,
106 Name: t.Name,
107 Description: t.Description,
108 Schema: t.Schema,
109 Deferred: t.Deferred,
110 }
111 }
112 return out
113}
114
115func (a *extToolAdapter) NewExtensionTool(info ExtensionToolInfo) core.Tool {
116 return extensions.NewTool(a.mgr, extensions.ToolInfo{
117 Extension: info.Extension,
118 Name: info.Name,
119 Description: info.Description,
120 Schema: info.Schema,
121 Deferred: info.Deferred,
122 })
123}
124
125// liveInteractiveAgent returns the agent currently owned by the TUI. The
126// fallback is only used before the Interactive has been constructed.
127//
128// Agent rebuilds, such as cross-provider model switches, replace the TUI's
129// agent without replacing the startup pointer held by runInteractive. Session
130// operations must therefore resolve the live agent at the time of the action.
131func liveInteractiveAgent(iv *modes.Interactive, fallback *core.Agent) *core.Agent {
132 if iv != nil {
133 return iv.Agent()
134 }
135 return fallback
136}
137
138func trimMessagesForResume(msgs []provider.Message, keepTail int) []provider.Message {
139 if keepTail <= 0 || len(msgs) <= keepTail {
140 return provider.RepairOrphanedToolResults(msgs)
141 }
142 var out []provider.Message
143 start := len(msgs) - keepTail
144 // Preserve the synthetic compaction summary when present so an
145 // already-compacted session stays compacted after resume.
146 if len(msgs) > 0 && msgs[0].Meta["compaction"] == "true" && start > 1 {
147 out = append(out, msgs[0])
148 }
149 // Avoid hydrating a tail that starts with orphan tool_result rows;
150 // provider APIs require those to be paired with an earlier tool_use.
151 for start < len(msgs) && msgs[start].Role == provider.RoleTool {
152 start++
153 }
154 out = append(out, msgs[start:]...)
155 return provider.RepairOrphanedToolResults(out)
156}
157
158// fanoutAgentEvent translates a core.AgentEvent into the wire-format
159// EventFromHost and pushes it through the extension manager. Only
160// the events that have a clear extension-facing meaning are
161// forwarded; internal-only ones (text_delta, tool_progress) are
162// dropped to keep the per-extension stream sane.
163func fanoutAgentEvent(mgr *extensions.Manager, ev core.AgentEvent) {
164 if mgr == nil {
165 return
166 }
167 switch e := ev.(type) {
168 case core.EvTurnStart:
169 mgr.EmitEvent(extproto.EventFromHost{Event: "turn_start", Step: e.Step})
170 case core.EvToolCall:
171 mgr.EmitEvent(extproto.EventFromHost{
172 Event: "tool_call", ToolID: e.ID, ToolName: e.Name, ToolArgs: e.Args,
173 })
174 case core.EvAssistantMessage:
175 // Concat the visible text portions of the message; binary
176 // blocks (tool_use, etc.) are skipped because subscribers
177 // usually want a string they can grep / display.
178 var text string
179 for _, c := range e.Message.Content {
180 if tb, ok := c.(provider.TextBlock); ok {
181 text += tb.Text
182 }
183 }
184 mgr.EmitEvent(extproto.EventFromHost{Event: "assistant_message", Text: text})
185 case core.EvTurnEnd:
186 ev := extproto.EventFromHost{Event: "turn_end", Stop: string(e.Stop)}
187 if e.Err != nil {
188 ev.Error = e.Err.Error()
189 }
190 mgr.EmitEvent(ev)
191 }
192}
193
194// Run is the top-level entrypoint for the zot binary.
195func Run(rawArgs []string, version string) error {
196 // Subcommand router: `zot bot ...` is handled separately so the
197 // generic flag parser doesn't reject "bot" as a positional arg.
198 if handled, err := runBotCommand(rawArgs, version); handled {
199 return err
200 }
201 if handled, err := runExtCommand(rawArgs, version); handled {
202 return err
203 }
204 if handled, err := runUpdateCommand(rawArgs, version); handled {
205 return err
206 }
207 if handled, err := runZotfileCommand(rawArgs, version); handled {
208 return err
209 }
210 return runWithArgsRaw(rawArgs, version)
211}
212
213func runWithArgsRaw(rawArgs []string, version string) error {
214 // `zot rpc` is shorthand for `zot --rpc` so third-party apps can
215 // spawn the binary with a clean argv. Strip the leading 'rpc'
216 // token and let the rest flow through the normal arg parser.
217 if len(rawArgs) > 0 && rawArgs[0] == "rpc" {
218 rawArgs = append([]string{"--rpc"}, rawArgs[1:]...)
219 }
220
221 args, err := ParseArgs(rawArgs)
222 if err != nil {
223 PrintHelp(version)
224 return err
225 }
226 if args.Help {
227 PrintHelp(version)
228 return nil
229 }
230 if args.Version {
231 fmt.Println("zot", version)
232 return nil
233 }
234 // Model catalog: load any cached discovery data before we inspect
235 // the model list (list-models, print/json, interactive).
236 prepareRuntimeCatalog()
237
238 if args.ListModels {
239 printModels()
240 return nil
241 }
242
243 return runWithArgs(args, version)
244}
245
246func runWithArgs(args Args, version string) error {
247 ctx := context.Background()
248 switch args.Mode {
249 case ModePrint:
250 return runPrintMode(ctx, args, version)
251 case ModeJSON:
252 return runJSONMode(ctx, args, version)
253 case ModeRPC:
254 return runRPCMode(ctx, args, version)
255 case ModeSwarmAgent:
256 return runSwarmAgentMode(ctx, args, version)
257 default:
258 return runInteractive(ctx, args, version)
259 }
260}
261
262// ---- print / json modes: require credentials, run single-shot ----
263
264// nonInteractiveExtHooks is the HostHooks impl used by print / json
265// modes. They have no TUI, so notify / display go to stderr and
266// submit / insert are no-ops (the extension can't steer a
267// single-shot run once it's in flight anyway).
268type nonInteractiveExtHooks struct{}
269
270func (nonInteractiveExtHooks) Notify(ext, level, message string) {
271 fmt.Fprintf(os.Stderr, "[%s] %s: %s\n", ext, level, message)
272}
273func (nonInteractiveExtHooks) Submit(string) {}
274func (nonInteractiveExtHooks) SubmitSlash(string) {}
275func (nonInteractiveExtHooks) Insert(string) {}
276func (nonInteractiveExtHooks) Display(string, string) {}
277func (nonInteractiveExtHooks) ClearNotes(string) {}
278func (nonInteractiveExtHooks) OpenPanel(string, extproto.PanelSpec) {}
279func (nonInteractiveExtHooks) UpdatePanel(string, string, string, []string, string) {}
280func (nonInteractiveExtHooks) ClosePanel(string, string) {}
281
282// setupNonInteractiveExtensions loads --ext paths and (unless
283// --no-ext) runs discovery. Returns the manager so the caller can
284// wire tools into the resolved registry, and a cleanup closure to
285// defer. Mirrors the interactive-mode setup minus the TUI hooks.
286func setupNonInteractiveExtensions(ctx context.Context, args Args, r *Resolved, version string) (*extensions.Manager, func()) {
287 extMgr := extensions.New(ZotHome(), r.CWD, version, r.Provider, r.Model, nonInteractiveExtHooks{})
288 for _, e := range extMgr.LoadExplicit(ctx, args.Exts) {
289 fmt.Fprintln(os.Stderr, "extension load:", e)
290 }
291 if !args.NoExt {
292 for _, e := range extMgr.Discover(ctx) {
293 fmt.Fprintln(os.Stderr, "extension load:", e)
294 }
295 }
296 extMgr.WaitForReady(3 * time.Second)
297 r.MergeExtensionTools(&extToolAdapter{mgr: extMgr})
298 extMgr.EmitEvent(extproto.EventFromHost{Event: "session_start"})
299 return extMgr, func() { extMgr.Stop(2 * time.Second) }
300}
301
302// wireNonInteractiveAgentExtHooks installs the same BeforeToolExecute
303// / BeforeTurn / BeforeAssistantMessage / OnEvent hooks the
304// interactive path wires up, so extensions get their normal
305// event-intercept surface in print / json / rpc flows too.
306func wireNonInteractiveAgentExtHooks(ctx context.Context, ag *core.Agent, extMgr *extensions.Manager) {
307 if ag == nil || extMgr == nil {
308 return
309 }
310 ag.BeforeToolExecute = func(call provider.ToolCallBlock) (bool, string, json.RawMessage) {
311 res := extMgr.InterceptToolCall(ctx, call.ID, call.Name, call.Arguments)
312 if res.Block {
313 return false, res.Reason, nil
314 }
315 return true, "", res.ModifiedArgs
316 }
317 ag.BeforeTurn = func(step int) (bool, string) {
318 res := extMgr.InterceptTurnStart(ctx, step)
319 return !res.Block, res.Reason
320 }
321 ag.BeforeAssistantMessage = func(text string) (bool, string, string) {
322 res := extMgr.InterceptAssistantMessage(ctx, text)
323 if res.Block {
324 return false, res.Reason, ""
325 }
326 return true, "", res.ReplaceText
327 }
328 ag.OnEvent = func(ev core.AgentEvent) { fanoutAgentEvent(extMgr, ev) }
329}
330
331func runPrintMode(ctx context.Context, args Args, version string) error {
332 if args.NoYolo {
333 fmt.Fprintln(os.Stderr, "warning: --no-yolo has no effect in print mode (no interactive prompt available); tools will run without confirmation")
334 }
335 r, err := Resolve(args, true)
336 if err != nil {
337 return err
338 }
339 extMgr, stopExt := setupNonInteractiveExtensions(ctx, args, &r, version)
340 defer stopExt()
341
342 ag := r.NewAgent()
343 wireNonInteractiveAgentExtHooks(ctx, ag, extMgr)
344 sess, _ := openOrCreateSession(args, r, ag, version)
345 defer sess.Close()
346
347 prompt := args.Prompt
348 if prompt == "" {
349 piped, _ := readAllStdin()
350 prompt = strings.TrimSpace(piped)
351 }
352 if prompt == "" {
353 return fmt.Errorf("print mode requires a prompt (arg or stdin)")
354 }
355
356 start := len(ag.Messages())
357 err = modes.RunPrint(ctx, ag, prompt, nil, os.Stdout)
358 WriteNewTranscript(ag, sess, start)
359 return err
360}
361
362func runJSONMode(ctx context.Context, args Args, version string) error {
363 if args.NoYolo {
364 fmt.Fprintln(os.Stderr, "warning: --no-yolo has no effect in json mode (no interactive prompt available); tools will run without confirmation")
365 }
366 r, err := Resolve(args, true)
367 if err != nil {
368 return err
369 }
370 extMgr, stopExt := setupNonInteractiveExtensions(ctx, args, &r, version)
371 defer stopExt()
372
373 ag := r.NewAgent()
374 wireNonInteractiveAgentExtHooks(ctx, ag, extMgr)
375 sess, _ := openOrCreateSession(args, r, ag, version)
376 defer sess.Close()
377
378 prompt := args.Prompt
379 if prompt == "" {
380 piped, _ := readAllStdin()
381 prompt = strings.TrimSpace(piped)
382 }
383 if prompt == "" {
384 return fmt.Errorf("json mode requires a prompt (arg or stdin)")
385 }
386
387 start := len(ag.Messages())
388 err = modes.RunJSON(ctx, ag, prompt, nil, os.Stdout)
389 WriteNewTranscript(ag, sess, start)
390 return err
391}
392
393// ---- interactive mode: opens the TUI even without credentials ----
394
395func runInteractive(ctx context.Context, args Args, version string) error {
396 // Resolve WITHOUT requiring credentials.
397 r, err := Resolve(args, false)
398 if err != nil {
399 return err
400 }
401
402 authStore := AuthStoreFor()
403 mgr := auth.NewManager(authStore)
404 defer mgr.Close()
405
406 // Keep the sandbox pointer stable across agent rebuilds (login / model
407 // switch). The Interactive UI toggles the lock via this pointer, and
408 // rebuilt tool instances must share the same one so the lock sticks.
409 sharedSandbox := r.Sandbox
410
411 // Build the extension manager BEFORE the agent so we can fold
412 // extension-defined tools into the registry. Forward-declare iv so
413 // the host hooks adapter can dereference it after construction.
414 var iv *modes.Interactive
415 extHooks := &interactiveExtHooks{ivPtr: &iv}
416 extMgr := extensions.New(ZotHome(), r.CWD, version, r.Provider, r.Model, extHooks)
417 var startupExtensionErrors []string
418 // --ext paths first so they win against installed extensions of
419 // the same name (loadOne's first-write-wins semantics).
420 for _, e := range extMgr.LoadExplicit(ctx, args.Exts) {
421 startupExtensionErrors = append(startupExtensionErrors, e.Error())
422 }
423 // --no-ext skips the global + project-local discovery scan;
424 // explicit --ext paths above are still honoured so you can run
425 // "only this extension" with --no-ext --ext ./x.
426 if !args.NoExt {
427 for _, e := range extMgr.Discover(ctx) {
428 startupExtensionErrors = append(startupExtensionErrors, e.Error())
429 }
430 }
431 // Wait briefly for extensions to flush their initial register_tool
432 // frames before we build the agent's tool registry. Half a second
433 // is plenty for any extension that's actually well-behaved; ones
434 // that don't send a ready frame eat the full grace and proceed.
435 // 3s is the per-extension grace period for the ready frame.
436 // Native binaries are instant; runtimes like `npx tsx` take ~1.5s
437 // from cold cache. The wait is tight only for extensions that
438 // haven't sent ready by then; ones that signalled earlier release
439 // the wait immediately.
440 extMgr.WaitForReady(3 * time.Second)
441 defer extMgr.Stop(2 * time.Second)
442
443 extToolAdapter := &extToolAdapter{mgr: extMgr}
444 r.MergeExtensionTools(extToolAdapter)
445
446 // Build the swarm supervisor BEFORE the agent so the auto-swarm
447 // tool can reference it during tool-registry construction. State
448 // lives under ZotHome/swarm so per-agent meta/events survive
449 // restarts; the user can hunt orphaned agents down with
450 // `git worktree list` if anything misbehaves.
451 //
452 // swarmMgr is also captured by loadSession / changeCWD closures
453 // further down the function, which is why we keep the variable
454 // in this outer scope rather than scoping it tighter.
455 var swarmMgr *swarm.Swarm
456 swarmMgr = swarm.New(swarm.Config{
457 Root: filepath.Join(ZotHome(), "swarm"),
458 RepoRoot: r.CWD,
459 })
460 // Pull any previously-spawned agents off disk so the dashboard
461 // shows them as detached and the user can resume / remove them.
462 _, _ = swarmMgr.Reload()
463
464 // onSpawnedSwarm is the OnSpawned callback the swarm_spawn tool
465 // fires after every successful spawn. It hands the agent off to
466 // the running Interactive so the watcher can flush a summary back
467 // into chat when all sub-agents finish. Reads `iv` lazily because
468 // the Interactive is constructed after the agent.
469 onSpawnedSwarm := func(a *swarm.Agent, task string) {
470 if iv != nil {
471 iv.TrackSwarmAgent(a, task)
472 }
473 }
474
475 // Inject the swarm_spawn auto-swarm tool only when /settings ->
476 // auto-swarm is currently enabled. Registering it unconditionally
477 // leaves the model trying to call it (and getting a polite error)
478 // even when the user has switched the feature off. The /settings
479 // toggle live-mutates the running agent's registry separately so
480 // flipping the flag mid-session takes effect on the next turn.
481 injectSwarmSpawn := func(reg core.Registry) core.Registry {
482 if reg == nil {
483 return reg
484 }
485 if !AutoSwarmEnabled() {
486 return reg
487 }
488 reg["swarm_spawn"] = &tools.SwarmSpawnTool{
489 Swarm: swarmMgr,
490 Enabled: AutoSwarmEnabled,
491 DefaultModel: func() string { return r.Model },
492 DefaultProvider: func() string { return r.Provider },
493 OnSpawned: onSpawnedSwarm,
494 }
495 return reg
496 }
497 injectSwarmSpawn(r.ToolRegistry)
498
499 // Confirmation gate: when --no-yolo is on, the agent must ask
500 // the user before every tool call. In interactive mode the TUI
501 // provides the Confirmer; in print/json/rpc modes there's no
502 // way to prompt, so the gate is constructed with a nil inner
503 // which auto-refuses every call with a helpful reason.
504 var confirmGate *core.ConfirmGate
505 if args.NoYolo {
506 confirmGate = core.NewConfirmGate(nil) // set below for interactive
507 }
508
509 // Capture current args in a closure so BuildAgent can re-resolve
510 // after a successful login (picks up the newly stored credential).
511 wireAgentExt := func(a *core.Agent) *core.Agent {
512 if a == nil {
513 return a
514 }
515 a.BeforeToolExecute = func(call provider.ToolCallBlock) (bool, string, json.RawMessage) {
516 // Guards run before confirmation because they may rewrite the
517 // arguments. The user must approve the effective call that will
518 // actually execute, not the model's original arguments.
519 r := extMgr.InterceptToolCall(ctx, call.ID, call.Name, call.Arguments)
520 if r.Block {
521 return false, r.Reason, nil
522 }
523 effectiveArgs := call.Arguments
524 if len(r.ModifiedArgs) > 0 && json.Valid(r.ModifiedArgs) {
525 effectiveArgs = r.ModifiedArgs
526 }
527 if confirmGate != nil {
528 var content strings.Builder
529 if tool, err := a.Tools.Get(call.Name); err == nil {
530 if previewer, ok := tool.(core.ToolPreviewer); ok {
531 preview, err := previewer.Preview(ctx, effectiveArgs)
532 if err != nil {
533 return false, err.Error(), nil
534 }
535 for _, block := range preview.Content {
536 if text, ok := block.(provider.TextBlock); ok {
537 if content.Len() > 0 {
538 content.WriteString("\n")
539 }
540 content.WriteString(text.Text)
541 }
542 }
543 }
544 }
545 ok, reason, _ := confirmGate.CheckToolCall(core.ToolCallConfirmation{
546 ID: call.ID,
547 Name: call.Name,
548 Summary: core.BuildPreview(effectiveArgs, 120),
549 Content: content.String(),
550 })
551 if !ok {
552 return false, reason, nil
553 }
554 }
555 return true, "", r.ModifiedArgs
556 }
557 a.BeforeTurn = func(step int) (bool, string) {
558 r := extMgr.InterceptTurnStart(ctx, step)
559 return !r.Block, r.Reason
560 }
561 a.BeforeAssistantMessage = func(text string) (bool, string, string) {
562 r := extMgr.InterceptAssistantMessage(ctx, text)
563 if r.Block {
564 return false, r.Reason, ""
565 }
566 return true, "", r.ReplaceText
567 }
568 a.OnEvent = func(ev core.AgentEvent) { fanoutAgentEvent(extMgr, ev) }
569 return a
570 }
571
572 buildAgent := func() (*core.Agent, string, string, error) {
573 resolved, err := Resolve(args, true)
574 if err != nil {
575 return nil, "", "", err
576 }
577 resolved.UseSandbox(sharedSandbox)
578 resolved.MergeExtensionTools(extToolAdapter)
579 injectSwarmSpawn(resolved.ToolRegistry)
580 return wireAgentExt(resolved.NewAgent()), resolved.Provider, resolved.Model, nil
581 }
582
583 // Rebuild agent with an explicit provider/model override.
584 buildAgentFor := func(providerOverride, modelOverride string) (*core.Agent, string, string, error) {
585 next := args
586 if providerOverride != "" {
587 next.Provider = providerOverride
588 }
589 if modelOverride != "" {
590 next.Model = modelOverride
591 }
592 resolved, err := Resolve(next, true)
593 if err != nil {
594 return nil, "", "", err
595 }
596 resolved.UseSandbox(sharedSandbox)
597 resolved.MergeExtensionTools(extToolAdapter)
598 injectSwarmSpawn(resolved.ToolRegistry)
599 return wireAgentExt(resolved.NewAgent()), resolved.Provider, resolved.Model, nil
600 }
601
602 // Rebuild agent for the rescue picker after a recoverable failure.
603 // Unlike buildAgentFor, this drops launch-time --api-key and
604 // --base-url overrides because those are typically the cause of the
605 // rescue (a bad key, a typo'd base URL, or a corporate gateway that
606 // only the originally-picked provider needed). Re-resolving without
607 // them lets the rescue retry use env vars / auth.json / provider
608 // defaults the way zot would have without the overrides.
609 buildAgentForRescue := func(providerOverride, modelOverride string) (*core.Agent, string, string, error) {
610 next := args
611 next.APIKey = ""
612 next.BaseURL = ""
613 if providerOverride != "" {
614 next.Provider = providerOverride
615 }
616 if modelOverride != "" {
617 next.Model = modelOverride
618 }
619 resolved, err := Resolve(next, true)
620 if err != nil {
621 return nil, "", "", err
622 }
623 resolved.UseSandbox(sharedSandbox)
624 resolved.MergeExtensionTools(extToolAdapter)
625 injectSwarmSpawn(resolved.ToolRegistry)
626 return wireAgentExt(resolved.NewAgent()), resolved.Provider, resolved.Model, nil
627 }
628
629 var ag *core.Agent
630 if r.HasCredential() {
631 ag = wireAgentExt(r.NewAgent())
632 }
633
634 // /reload-ext callback: after the manager has respawned every
635 // extension, re-resolve the tool registry (built-ins + freshly-
636 // registered extension tools) and swap it onto the current
637 // agent in-place. The current agent may have been replaced by a
638 // /model swap since spawn, so re-read the live `ag` on each
639 // invocation.
640 extMgr.SetOnReload(func() {
641 current := ag
642 if current == nil {
643 return
644 }
645 resolved, err := Resolve(args, true)
646 if err != nil {
647 return
648 }
649 resolved.UseSandbox(sharedSandbox)
650 resolved.MergeExtensionTools(extToolAdapter)
651 injectSwarmSpawn(resolved.ToolRegistry)
652 current.SetTools(resolved.ToolRegistry)
653 })
654
655 // Fire session_start once we know the manager's running.
656 extMgr.EmitEvent(extproto.EventFromHost{Event: "session_start"})
657
658 var sess *core.Session
659 var sessBaselineMsgs int // messages already on disk when current session opened
660 // persistMu guards sess + sessBaselineMsgs against concurrent access
661 // from the agent loop's per-message persistence hook (runs on the
662 // agent goroutine) and the TUI's session swap / flush callbacks
663 // (run on the TUI goroutine). Without this, a /sessions swap that
664 // races with a finishing turn could double-write or lose messages.
665 var persistMu sync.Mutex
666 if !args.NoSess && ag != nil {
667 sess, _ = openOrCreateSession(args, r, ag, version)
668 if ag != nil {
669 sessBaselineMsgs = len(ag.Messages())
670 }
671 }
672 defer func() {
673 persistMu.Lock()
674 defer persistMu.Unlock()
675 if sess != nil {
676 sess.Close()
677 }
678 }()
679
680 // persistMessage is the per-message hook bound to the agent. It
681 // appends each new transcript message to the live session as soon
682 // as it lands, so a kill / closed terminal / OS crash costs at
683 // most the in-flight turn instead of the whole session. The
684 // baseline counter advances in lock-step so the exit-time flush
685 // doesn't double-write rows already on disk.
686 persistMessage := func(m provider.Message) {
687 persistMu.Lock()
688 defer persistMu.Unlock()
689 if sess == nil {
690 return
691 }
692 if err := sess.AppendMessage(m); err == nil {
693 sessBaselineMsgs++
694 }
695 }
696 persistUsage := func(cum provider.Usage) {
697 persistMu.Lock()
698 defer persistMu.Unlock()
699 if sess == nil {
700 return
701 }
702 _ = sess.AppendUsage(cum, cum)
703 }
704 persistCompaction := func(messages []provider.Message) {
705 persistMu.Lock()
706 defer persistMu.Unlock()
707 if sess == nil {
708 return
709 }
710 if err := sess.AppendCompaction(messages); err == nil {
711 sessBaselineMsgs = len(messages)
712 }
713 }
714 wireAgentPersist := func(a *core.Agent) *core.Agent {
715 if a == nil {
716 return a
717 }
718 a.OnMessageAppended = persistMessage
719 a.OnUsage = persistUsage
720 a.OnTranscriptCompacted = persistCompaction
721 return a
722 }
723 wireAgentPersist(ag)
724
725 // Re-wrap the build closures so any agent constructed by the TUI
726 // (login, /model swap to a different provider) also gets the
727 // persistence hooks. Without this, switching provider would
728 // silently revert to the old in-memory-only behaviour.
729 baseBuildAgent := buildAgent
730 buildAgent = func() (*core.Agent, string, string, error) {
731 a, p, m, err := baseBuildAgent()
732 return wireAgentPersist(a), p, m, err
733 }
734 baseBuildAgentFor := buildAgentFor
735 buildAgentFor = func(providerOverride, modelOverride string) (*core.Agent, string, string, error) {
736 a, p, m, err := baseBuildAgentFor(providerOverride, modelOverride)
737 return wireAgentPersist(a), p, m, err
738 }
739 baseBuildAgentForRescue := buildAgentForRescue
740 buildAgentForRescue = func(providerOverride, modelOverride string) (*core.Agent, string, string, error) {
741 a, p, m, err := baseBuildAgentForRescue(providerOverride, modelOverride)
742 return wireAgentPersist(a), p, m, err
743 }
744
745 // loadSession replaces the current session with the one at path and
746 // hands its messages to the agent. Used by the /sessions picker.
747 loadSession := func(path string) error {
748 currentAg := liveInteractiveAgent(iv, ag)
749 if currentAg == nil {
750 return fmt.Errorf("no agent running; log in first")
751 }
752 newSess, msgs, err := core.OpenSession(path)
753 if err != nil {
754 return err
755 }
756 fullMsgCount := len(msgs)
757 msgs = trimMessagesForResume(msgs, 100)
758 persistMu.Lock()
759 // Flush any unsaved messages to the old session before swapping.
760 // Per-message persistence keeps sessBaselineMsgs current, so
761 // this is a defensive no-op in the common case; it still
762 // matters for the rare race where a turn just finished and
763 // hadn't fired its hook yet.
764 if sess != nil {
765 writeNewTranscriptLocked(currentAg, sess, sessBaselineMsgs)
766 _ = sess.Close()
767 }
768 sess = newSess
769 currentAg.SetMessages(msgs)
770 if cum, last, uerr := core.SessionUsageDetail(path); uerr == nil {
771 currentAg.SeedCost(cum)
772 currentAg.SeedLastTurnUsage(last)
773 }
774 // The live agent only receives a compact resume window, but
775 // the session file remains intact. Keep the persistence
776 // baseline at the original on-disk message count so future
777 // turns append after the full session instead of duplicating
778 // the hydrated tail.
779 sessBaselineMsgs = fullMsgCount
780 persistMu.Unlock()
781 // Re-scope the swarm dashboard to the new session so /swarm
782 // only shows agents this session spawned. swarmMgr may be nil
783 // here if we haven't reached the construction site yet (it
784 // shouldn't be, since the interactive loop is what triggers
785 // loadSession, but the nil check is cheap insurance).
786 if swarmMgr != nil && newSess != nil {
787 swarmMgr.SetActiveSession(newSess.ID)
788 }
789 return nil
790 }
791
792 // changeCWD switches the running session to a new working directory.
793 // Wired into InteractiveConfig.ChangeCWD and invoked by the hidden
794 // /cd slash command (which itself is only fired by the workspaces
795 // extension's panel-key Enter handler today; the user can type /cd
796 // directly but it's not in autocomplete / help / the README).
797 //
798 // Steps, in order:
799 // 1. resolve + validate the new path (~ expansion, abs/rel)
800 // 2. close the current session, flushing pending messages
801 // 3. mutate captured args.CWD + r.CWD so future buildAgent
802 // calls bind to the new cwd
803 // 4. re-root the shared sandbox («·«) so /jail follows the
804 // session into the new cwd instead of widening or silently
805 // dropping
806 // 5. rebuild the agent via buildAgent() so tools, AGENTS.md
807 // addendum, system prompt, sessions dir all bind correctly
808 // 6. open a fresh session in the new cwd's bucket
809 // 7. push the new state into the running Interactive
810 // 8. re-scope the swarm dashboard to the freshly-opened session
811 //
812 // The /jail state is preserved verbatim: if the sandbox was locked
813 // to the old cwd, it stays locked, just re-pointed at the new one.
814 changeCWD := func(path string) error {
815 if path == "" {
816 return fmt.Errorf("empty path")
817 }
818 // ~ expansion.
819 if path == "~" || strings.HasPrefix(path, "~/") {
820 home, herr := os.UserHomeDir()
821 if herr != nil || home == "" {
822 return fmt.Errorf("cannot expand ~: %v", herr)
823 }
824 if path == "~" {
825 path = home
826 } else {
827 path = filepath.Join(home, path[2:])
828 }
829 }
830 if !filepath.IsAbs(path) {
831 path = filepath.Join(args.CWD, path)
832 }
833 absPath, err := filepath.Abs(path)
834 if err != nil {
835 return err
836 }
837 info, err := os.Stat(absPath)
838 if err != nil {
839 return err
840 }
841 if !info.IsDir() {
842 return fmt.Errorf("not a directory: %s", absPath)
843 }
844
845 currentAg := ag
846 if currentAg == nil {
847 return fmt.Errorf("no agent running; log in first")
848 }
849
850 // Close the current session before we drop the reference.
851 // Per-message persistence keeps it current already; this is
852 // a defensive flush + final fsync via Close.
853 persistMu.Lock()
854 if sess != nil {
855 writeNewTranscriptLocked(currentAg, sess, sessBaselineMsgs)
856 _ = sess.Close()
857 sess = nil
858 }
859 sessBaselineMsgs = 0
860 persistMu.Unlock()
861
862 // Mutate captured state so subsequent agent rebuilds and
863 // session opens see the new cwd.
864 wasJailed := sharedSandbox != nil && sharedSandbox.Locked()
865 args.CWD = absPath
866 r.CWD = absPath
867 if args.PermissionSet != nil {
868 expanded := args.PermissionSet.Expand(absPath, args.AgentDataDir)
869 args.PermissionSet = &expanded
870 }
871 if sharedSandbox != nil {
872 sharedSandbox.Root = absPath
873 if wasJailed {
874 sharedSandbox.Lock()
875 } else {
876 sharedSandbox.Unlock()
877 }
878 }
879
880 // Rebuild the agent so tools / AGENTS.md / system prompt
881 // re-bind to the new cwd. buildAgent() reads from args + r.
882 newAg, newProvider, newModel, berr := buildAgent()
883 if berr != nil {
884 return fmt.Errorf("rebuild agent: %v", berr)
885 }
886 ag = newAg
887
888 // Fresh session in the new cwd's bucket. We bypass
889 // openOrCreateSession's --continue / --resume branches
890 // because /cd's semantics are "start fresh here", matching
891 // what relaunching `zot --cwd <path>` would do today.
892 if !args.NoSess {
893 newRoot := agentSessionsRoot(ZotHome(), args)
894 core.PruneEmptySessions(newRoot, absPath)
895 newSess, serr := core.NewSession(newRoot, absPath, newProvider, newModel, version)
896 if serr != nil {
897 return fmt.Errorf("open session in %s: %v", absPath, serr)
898 }
899 persistMu.Lock()
900 sess = newSess
901 sessBaselineMsgs = 0
902 persistMu.Unlock()
903 }
904
905 // Push the new state into the running Interactive.
906 if iv != nil {
907 startupPaths := instructionContextPaths(loadAgentsContext(absPath, ZotHome()))
908 iv.ApplyChangedCWDWithStartupContext(newAg, newProvider, newModel, absPath, startupPaths)
909 }
910
911 // Re-scope the swarm dashboard to the new session.
912 if swarmMgr != nil && sess != nil {
913 swarmMgr.SetActiveSession(sess.ID)
914 }
915 return nil
916 }
917
918 term := tui.NewProcTerm()
919
920 // Kick off the async update check so the banner can appear when the
921 // http response eventually arrives (usually <1s on cached DNS). Map
922 // agent.UpdateInfo -> modes.UpdateInfo here to avoid a cyclic import.
923 updateCh := make(chan modes.UpdateInfo, 1)
924 go func() {
925 defer close(updateCh)
926 src := <-CheckForUpdateAsync(ZotHome(), version)
927 updateCh <- modes.UpdateInfo{
928 Current: src.Current,
929 Latest: src.Latest,
930 Available: src.Available,
931 URL: src.URL,
932 }
933 }()
934
935 // Changelog: when the running version differs from the last
936 // version whose release notes the user dismissed, fetch the
937 // release body from GitHub and have the TUI show it once. On
938 // first-ever launch (no prior LastChangelogShown), seed the
939 // stored version silently — don't dump release notes at someone
940 // who just installed.
941 changelogCh := make(chan modes.ChangelogPayload, 1)
942 go func() {
943 defer close(changelogCh)
944 cfg, _ := LoadConfig()
945 if cfg.LastChangelogShown == "" {
946 SeedChangelogVersion(version)
947 return
948 }
949 if !ShouldShowChangelog(version, cfg) {
950 return
951 }
952 info := <-FetchChangelogAsync(version)
953 if info.Body == "" {
954 return
955 }
956 // For dev builds (0.0.0), skip if the latest release was
957 // already shown (stored by the dismiss callback).
958 if version == "0.0.0" && info.Version == cfg.LastChangelogShown {
959 return
960 }
961 changelogCh <- modes.ChangelogPayload{
962 Version: info.Version,
963 Body: info.Body,
964 URL: info.URL,
965 }
966 }()
967
968 initialCfg, _ := LoadConfig()
969 quickModelShortcuts := make([]modes.QuickModelShortcut, len(initialCfg.QuickModelShortcuts))
970 for idx, s := range initialCfg.QuickModelShortcuts {
971 quickModelShortcuts[idx] = modes.QuickModelShortcut{Provider: s.Provider, Model: s.Model}
972 }
973 theme, _, themeErr := tui.DetectThemeWithCustom(ZotHome(), initialCfg.Theme, 80*time.Millisecond)
974 if themeErr != nil {
975 fmt.Fprintln(os.Stderr, "theme load:", themeErr)
976 if initialCfg.Theme != "" && !tui.ThemeExists(ZotHome(), initialCfg.Theme) {
977 initialCfg.Theme = ""
978 _ = SaveConfig(initialCfg)
979 }
980 }
981
982 // swarmMgr was constructed and reloaded earlier (before the agent
983 // build, so the auto-swarm tool could capture it). Here we just
984 // scope the dashboard to the active host session so /swarm only
985 // shows agents this session spawned (and any pre-upgrade unscoped
986 // agents — see SnapshotAll docs). Updated again whenever the
987 // user swaps sessions via loadSession below.
988 if sess != nil {
989 swarmMgr.SetActiveSession(sess.ID)
990 }
991 // Best-effort shutdown on interactive exit: stop all running
992 // agents so they don't outlive their parent zot.
993 defer swarmMgr.StopAll()
994
995 var startupSkills []*skills.Skill
996 if r.SkillTool != nil {
997 startupSkills = r.SkillTool.Skills()
998 }
999
1000 iv = modes.NewInteractive(modes.InteractiveConfig{
1001 Terminal: term,
1002 Theme: theme,
1003 InlineImagesEnabled: initialCfg.InlineImagesEnabled,
1004 AutoSwarmEnabled: initialCfg.AutoSwarmEnabled,
1005 AutoCompactThreshold: initialCfg.AutoCompactThreshold,
1006 JailByDefault: initialCfg.JailByDefault,
1007 QuickModelShortcuts: quickModelShortcuts,
1008 RecursiveFileSuggest: initialCfg.RecursiveFileSuggest,
1009 RespectGitignore: initialCfg.RespectGitignore,
1010 CompactMode: initialCfg.CompactMode,
1011 TUIInputStyle: initialCfg.TUIInputStyle,
1012 TUIStatusPosition: initialCfg.TUIStatusPosition,
1013 TUIWorkingPosition: initialCfg.TUIWorkingPosition,
1014 ThemeName: initialCfg.Theme,
1015 FlatTools: initialCfg.FlatToolRender(),
1016 CompactUser: initialCfg.CompactUserInput(),
1017 ExtensionThemes: extMgr.ThemeOptions,
1018 AutoSwarmSystemAddendum: AutoSwarmSystemAddendum,
1019 SettingsStore: configSettingsStore{},
1020 Model: r.Model,
1021 Provider: r.Provider,
1022 AuthMethod: r.AuthMethod,
1023 BaseURL: r.BaseURL,
1024 Reasoning: r.Reasoning,
1025 SystemPrompt: r.SystemPrompt,
1026 Tools: r.ToolRegistry,
1027 MaxSteps: r.MaxSteps,
1028 CWD: r.CWD,
1029 StartupAgentName: args.AgentName,
1030 StartupContextPaths: instructionContextPaths(r.ContextFiles),
1031 StartupExtensionNames: startupExtensionNames(extMgr.All()),
1032 StartupExtensionErrors: startupExtensionErrors,
1033 StartupSkillNames: startupSkillNames(startupSkills),
1034 ShowInstructionsAtStartup: initialCfg.ShowInstructionsAtStartup,
1035 ZotHome: ZotHome(),
1036 SessionsRoot: agentSessionsRoot(ZotHome(), args),
1037 Version: version,
1038 UpdateInfoChan: updateCh,
1039 Sandbox: sharedSandbox,
1040 Agent: ag,
1041 InitialInput: args.Prompt,
1042 AuthManager: mgr,
1043 LlamaCPPConfig: ResolveLlamaCPPConfig,
1044 RefreshLlamaCPPModels: RefreshLlamaCPPModels,
1045 BuildAgent: buildAgent,
1046 SetKimiCLIFallbackDisabled: SetKimiCLIFallbackDisabled,
1047 BuildAgentFor: buildAgentFor,
1048 BuildAgentForRescue: buildAgentForRescue,
1049 LoggedInProviders: func() []string {
1050 var out []string
1051 seen := map[string]bool{}
1052 for _, p := range knownProviders {
1053 if CredentialAvailable(p) && !seen[p] {
1054 out = append(out, p)
1055 seen[p] = true
1056 }
1057 }
1058 // Include custom providers that have credentials stored.
1059 for p := range provider.CustomProviders() {
1060 if CredentialAvailable(p) && !seen[p] {
1061 out = append(out, p)
1062 seen[p] = true
1063 }
1064 }
1065 // Ollama models are always available (no auth needed).
1066 if !seen["ollama"] {
1067 out = append(out, "ollama")
1068 }
1069 return out
1070 },
1071 LoadSession: loadSession,
1072 ChangeCWD: changeCWD,
1073 CurrentSessionPath: func() string {
1074 if sess == nil {
1075 return ""
1076 }
1077 return sess.Path
1078 },
1079 FlushSession: func() {
1080 // Append any not-yet-persisted agent messages to the
1081 // current session file, then advance the baseline so
1082 // the final WriteNewTranscript at exit doesn't write
1083 // duplicates. Per-message persistence keeps the on-
1084 // disk file current already, so this is mostly a
1085 // defensive flush — still needed for /session export
1086 // to guarantee the exported bytes include the very
1087 // last in-flight turn.
1088 currentAg := iv.Agent()
1089 if currentAg == nil {
1090 return
1091 }
1092 persistMu.Lock()
1093 defer persistMu.Unlock()
1094 if sess == nil {
1095 return
1096 }
1097 writeNewTranscriptLocked(currentAg, sess, sessBaselineMsgs)
1098 sessBaselineMsgs = len(currentAg.Messages())
1099 },
1100 Extensions: extMgr,
1101 Swarm: swarmMgr,
1102 ChangelogChan: changelogCh,
1103 OnChangelogDismiss: func() {
1104 // For dev builds (0.0.0) store the actual release version
1105 // so the same changelog doesn't show again next launch.
1106 // For real builds, store the binary version.
1107 v := version
1108 if v == "0.0.0" {
1109 if iv != nil && iv.ChangelogVersion() != "" {
1110 v = iv.ChangelogVersion()
1111 }
1112 }
1113 _ = MarkChangelogShown(v)
1114 },
1115 SkillSnapshot: func() []*skills.Skill {
1116 if args.NoSkill {
1117 // --no-skill: nothing for the picker to show.
1118 return nil
1119 }
1120 // Re-discover so the picker reflects edits made during
1121 // the session. Cheap; SKILL.md files are small. Filter
1122 // out built-in skills — they're hidden from user-facing
1123 // surfaces because they're implementation detail; the
1124 // model still sees them through the system-prompt
1125 // manifest and the skill tool.
1126 userHome, _ := os.UserHomeDir()
1127 list, _ := skills.Discover(ZotHome(), r.CWD, userHome, args.WithSkills)
1128 return skills.VisibleSkills(list)
1129 },
1130 NoYolo: args.NoYolo,
1131 ConfirmGate: confirmGate,
1132 PersistModel: func(providerName, model string) {
1133 // Update config.json so next launch uses the same pick.
1134 cfg, _ := LoadConfig()
1135 cfg.Provider = providerName
1136 cfg.Model = model
1137 _ = SaveConfig(cfg)
1138 // Update the active session's meta so resume picks this up.
1139 if sess != nil {
1140 _ = sess.UpdateModel(providerName, model)
1141 }
1142 },
1143 })
1144
1145 // Bind the interactive TUI as the Confirmer. We deferred this
1146 // until now because the gate is constructed before the TUI
1147 // (the BeforeToolExecute closure captures it). SetConfirmer
1148 // is mutex-guarded on the gate so this is safe.
1149 if confirmGate != nil {
1150 confirmGate.SetConfirmer(&confirmationEventConfirmer{
1151 inner: iv,
1152 emit: extMgr.EmitEvent,
1153 })
1154 }
1155
1156 // Signal-driven flush: a SIGTERM / SIGHUP to the zot process
1157 // (closed terminal window, system shutdown, kill) used to lose
1158 // the entire in-memory transcript because the deferred post-Run
1159 // flush below never ran. Per-message persistence above covers
1160 // most of it; this handler writes any in-flight remainder and
1161 // then exits the process so we don't double-paint over a
1162 // broken terminal that the TUI's restore deferreds can no
1163 // longer fix from a signal context.
1164 //
1165 // SIGINT is intentionally NOT handled here — the TUI consumes
1166 // Ctrl+C as a regular key event for cancel/clear semantics, and
1167 // installing a SIGINT notifier here would swallow it.
1168 sigCh := make(chan os.Signal, 1)
1169 signal.Notify(sigCh, syscall.SIGTERM, syscall.SIGHUP)
1170 defer signal.Stop(sigCh)
1171 go func() {
1172 _, ok := <-sigCh
1173 if !ok {
1174 return
1175 }
1176 if finalAg := iv.Agent(); finalAg != nil {
1177 persistMu.Lock()
1178 if sess != nil {
1179 writeNewTranscriptLocked(finalAg, sess, sessBaselineMsgs)
1180 sessBaselineMsgs = len(finalAg.Messages())
1181 _ = sess.Close()
1182 sess = nil
1183 }
1184 persistMu.Unlock()
1185 }
1186 // Exit cleanly. Re-raising the signal would skip os.Exit's
1187 // at-exit hooks; explicit exit is fine because we've already
1188 // flushed the only at-risk state (the session file).
1189 os.Exit(0)
1190 }()
1191
1192 runErr := iv.Run(ctx)
1193
1194 // Flush final transcript to session (only if we had / ended up with an agent).
1195 if finalAg := iv.Agent(); finalAg != nil {
1196 persistMu.Lock()
1197 if sess != nil {
1198 writeNewTranscriptLocked(finalAg, sess, sessBaselineMsgs)
1199 sessBaselineMsgs = len(finalAg.Messages())
1200 }
1201 persistMu.Unlock()
1202 }
1203 return runErr
1204}
1205
1206func agentSessionsRoot(root string, args Args) string {
1207 if args.AgentName == "" {
1208 return root
1209 }
1210 return filepath.Join(root, "sessions", "agents", safeAgentName(args.AgentName))
1211}
1212
1213// openOrCreateSession returns a session for the run. sess may be nil
1214// with a nil error if session persistence is disabled.
1215func openOrCreateSession(args Args, r Resolved, ag *core.Agent, version string) (*core.Session, error) {
1216 if args.NoSess {
1217 return nil, nil
1218 }
1219 // Sweep meta-only files left over from older zot versions (and from
1220 // any session that crashed before its first AppendMessage). Cheap;
1221 // reads the first few bytes of each file in the cwd's session dir.
1222 sessionsRoot := agentSessionsRoot(ZotHome(), args)
1223 core.PruneEmptySessions(sessionsRoot, args.CWD)
1224 var (
1225 s *core.Session
1226 msgs []provider.Message
1227 err error
1228 )
1229 switch {
1230 case args.Session != "":
1231 s, msgs, err = core.OpenSession(args.Session)
1232 // The swarm-agent child passes a fixed --session path that
1233 // may not exist yet on first Spawn. Treat ENOENT as "create
1234 // a fresh session AT THIS PATH" so the conversation actually
1235 // gets persisted; without this fallback the swarm child runs
1236 // with sess==nil and every Resume re-starts with no memory
1237 // of the prior turns. Other openers (--continue / --resume /
1238 // the picker) never see ENOENT here because they only choose
1239 // paths that already exist on disk.
1240 if err != nil && errors.Is(err, os.ErrNotExist) {
1241 s, err = core.NewSessionAtPath(args.Session, args.CWD, r.Provider, r.Model, version)
1242 msgs = nil
1243 }
1244 case args.Continue:
1245 latest := core.LatestSession(sessionsRoot, args.CWD)
1246 if latest != "" {
1247 s, msgs, err = core.OpenSession(latest)
1248 }
1249 case args.Resume:
1250 picked, perr := pickSession(sessionsRoot, args.CWD)
1251 if perr != nil {
1252 return nil, perr
1253 }
1254 if picked != "" {
1255 s, msgs, err = core.OpenSession(picked)
1256 }
1257 }
1258 if err != nil {
1259 return nil, err
1260 }
1261 if s != nil {
1262 ag.SetMessages(msgs)
1263 if cum, last, uerr := core.SessionUsageDetail(s.Path); uerr == nil {
1264 ag.SeedCost(cum)
1265 ag.SeedLastTurnUsage(last)
1266 }
1267 return s, nil
1268 }
1269 return core.NewSession(sessionsRoot, args.CWD, r.Provider, r.Model, version)
1270}
1271
1272func pickSession(root, cwd string) (string, error) {
1273 files := core.ListSessions(root, cwd)
1274 if len(files) == 0 {
1275 fmt.Fprintln(os.Stderr, "no sessions for", cwd)
1276 return "", nil
1277 }
1278 for i, f := range files {
1279 fmt.Fprintf(os.Stderr, " %2d) %s\n", i+1, f)
1280 }
1281 fmt.Fprint(os.Stderr, "pick #: ")
1282 rd := bufio.NewReader(os.Stdin)
1283 line, _ := rd.ReadString('\n')
1284 line = strings.TrimSpace(line)
1285 var n int
1286 if _, err := fmt.Sscanf(line, "%d", &n); err != nil || n < 1 || n > len(files) {
1287 return "", fmt.Errorf("invalid selection")
1288 }
1289 return files[n-1], nil
1290}
1291
1292// WriteNewTranscript appends only messages after index `from` from the
1293// agent's transcript to the session. Used by callers that don't hold
1294// the persistMu (non-interactive print/json modes which run a single
1295// turn under their own goroutine).
1296func WriteNewTranscript(ag *core.Agent, sess *core.Session, from int) {
1297 writeNewTranscriptLocked(ag, sess, from)
1298}
1299
1300// writeNewTranscriptLocked is the same as WriteNewTranscript. The
1301// suffix marks that interactive callers must hold persistMu when
1302// invoking it so concurrent appends from the agent loop don't race
1303// with this catch-up flush.
1304func writeNewTranscriptLocked(ag *core.Agent, sess *core.Session, from int) {
1305 if sess == nil || ag == nil {
1306 return
1307 }
1308 msgs := ag.Messages()
1309 for i := from; i < len(msgs); i++ {
1310 _ = sess.AppendMessage(msgs[i])
1311 }
1312 cum := ag.Cost()
1313 _ = sess.AppendUsage(cum, cum)
1314}
1315
1316func readAllStdin() (string, error) {
1317 fi, err := os.Stdin.Stat()
1318 if err != nil {
1319 return "", err
1320 }
1321 if (fi.Mode() & os.ModeCharDevice) != 0 {
1322 return "", nil
1323 }
1324 b, err := io.ReadAll(os.Stdin)
1325 return string(b), err
1326}
1327
1328func printModels() {
1329 models := provider.Active()
1330
1331 // Compute column widths from actual data so wide providers (e.g.
1332 // xiaomi-token-plan-sgp) and long bedrock model ids don't force the
1333 // `name` column off-screen. Floors mirror the historical layout so
1334 // short catalogs look the same as before.
1335 provW, idW, srcW := len("provider"), len("model id"), len("source")
1336 for _, m := range models {
1337 if w := len(m.Provider); w > provW {
1338 provW = w
1339 }
1340 if w := len(m.ID); w > idW {
1341 idW = w
1342 }
1343 source := m.Source
1344 if source == "" {
1345 source = "catalog"
1346 }
1347 if m.Speculative {
1348 source = "speculative"
1349 }
1350 if w := len(source); w > srcW {
1351 srcW = w
1352 }
1353 }
1354
1355 header := fmt.Sprintf("%-*s %-*s %8s %8s %s %-*s %s",
1356 provW, "provider",
1357 idW, "model id",
1358 "context", "max-out", "reasoning",
1359 srcW, "source",
1360 "name")
1361 fmt.Println(header)
1362
1363 for _, m := range models {
1364 reason := " "
1365 if m.Reasoning {
1366 reason = "✓"
1367 }
1368 source := m.Source
1369 if source == "" {
1370 source = "catalog"
1371 }
1372 if m.Speculative {
1373 source = "speculative"
1374 }
1375 fmt.Printf("%-*s %-*s %8d %8d %s %-*s %s\n",
1376 provW, m.Provider,
1377 idW, m.ID,
1378 m.ContextWindow, m.MaxOutput,
1379 reason,
1380 srcW, source,
1381 m.DisplayName)
1382 }
1383}