interactive.go RawHistoryFolder

1package modes
2
3import (
4	"context"
5	"fmt"
6	"os"
7	"path/filepath"
8	"strings"
9	"sync"
10	"time"
11
12	"github.com/patriceckhart/zot/internal/agent/extensions"
13	"github.com/patriceckhart/zot/internal/agent/modes/telegram"
14	"github.com/patriceckhart/zot/internal/agent/tools"
15	"github.com/patriceckhart/zot/internal/auth"
16	"github.com/patriceckhart/zot/internal/core"
17	"github.com/patriceckhart/zot/internal/provider"
18	"github.com/patriceckhart/zot/internal/skills"
19	"github.com/patriceckhart/zot/internal/tui"
20)
21
22// InteractiveConfig configures the interactive loop.
23type InteractiveConfig struct {
24	Terminal     tui.Terminal
25	Theme        tui.Theme
26	Model        string
27	Provider     string
28	AuthMethod   string // "apikey" | "oauth" — used to tag cost as (sub) in status bar
29	BaseURL      string
30	Reasoning    string
31	SystemPrompt string
32	Tools        core.Registry
33	MaxSteps     int
34	CWD          string
35
36	// Agent is optional. If nil, zot opens without credentials; the
37	// user must /login before they can prompt.
38	Agent *core.Agent
39
40	InitialInput string
41
42	// Auth is required. When the user runs /login, Interactive talks to
43	// AuthManager to open a browser and wait for the callback.
44	AuthManager *auth.Manager
45	// BuildAgent is called after a successful login to (re)construct the
46	// agent with the fresh credential. It returns the new agent and
47	// the concrete provider/model in use.
48	BuildAgent func() (*core.Agent, string, string, error)
49
50	// BuildAgentFor rebuilds the agent with an explicit provider/model
51	// override (used by the /model picker when switching providers).
52	// If providerOverride is empty, the current provider is kept.
53	BuildAgentFor func(providerOverride, modelOverride string) (*core.Agent, string, string, error)
54
55	// ZotHome is the root directory for sessions/, used by /sessions
56	// and the update-check cache.
57	ZotHome string
58
59	// Version is the binary's current version (from main.version).
60	// Used only for display; the update check itself is done outside
61	// this package to avoid an import cycle.
62	Version string
63
64	// UpdateInfoChan is an optional channel that delivers the result
65	// of the github-release update check. Interactive reads at most
66	// one value, drops it if the check reported nothing, and otherwise
67	// surfaces a yellow "update available" banner at the top of the
68	// chat. Nil channel = no banner, no startup cost.
69	UpdateInfoChan <-chan UpdateInfo
70
71	// Sandbox is the shared sandbox pointer. Toggled by /jail and /unjail.
72	Sandbox *tools.Sandbox
73
74	// LoadSession swaps the current session for the one at path. The
75	// callback returns the new agent message slice so the TUI can invalidate.
76	LoadSession func(path string) error
77
78	// CurrentSessionPath returns the path of the live session file
79	// on disk (the one every AppendMessage writes to). Used by
80	// /session export so the exporter ships the exact bytes on
81	// disk. Returns an empty string when --no-session is set or
82	// no session is open.
83	CurrentSessionPath func() string
84
85	// FlushSession writes any in-memory agent messages to the
86	// session file that haven't been persisted yet. Called by
87	// /session export right before reading the file so the
88	// exported bytes reflect the full current conversation, not
89	// just the rows the agent happened to write synchronously.
90	// The default WriteNewTranscript-at-exit strategy means most
91	// of a running session lives only in memory until the tui
92	// closes; without a flush hook, /session export writes a
93	// file that only has the meta row.
94	FlushSession func()
95
96	// PersistModel is called whenever the user switches model or provider.
97	// It should update config.json and (if there's an active session)
98	// write a new meta row so resume picks up the same model.
99	PersistModel func(providerName, model string)
100
101	OnAssistant  func(m provider.Message)
102	OnToolResult func(id string, r core.ToolResult)
103
104	// Extensions, if non-nil, lets users invoke extension-registered
105	// slash commands. Commands declared by extensions are looked up
106	// AFTER the built-in catalog so a built-in name always wins.
107	Extensions *extensions.Manager
108
109	// SkillSnapshot, if non-nil, returns the current list of
110	// discovered SKILL.md files. Re-invoked each time /skills opens
111	// so the picker reflects edits made during the session.
112	SkillSnapshot func() []*skills.Skill
113
114	// ChangelogChan, if non-nil, delivers release-notes for the
115	// current binary version once at startup. Interactive opens a
116	// dismissible overlay when the channel produces a non-empty
117	// body. Receiver fires at most once.
118	ChangelogChan <-chan ChangelogPayload
119
120	// OnChangelogDismiss, if non-nil, is called once the user
121	// closes the changelog overlay. The cli wires this to a
122	// MarkChangelogShown call so the same version doesn't show
123	// again on the next launch.
124	OnChangelogDismiss func()
125
126	// NoYolo is true when --no-yolo was passed. Interactive opens
127	// a confirmation dialog before every tool call and blocks the
128	// tool until the user picks yes / always-this-tool /
129	// always-all / no. When false (default), tools run freely.
130	NoYolo bool
131
132	// ConfirmGate is the session-scoped gate wrapping this
133	// interactive's Confirmer. When non-nil, /yolo can call
134	// AllowAll() on it to disable confirmation for the rest of the
135	// session. When nil (yolo mode), /yolo reports that there's
136	// nothing to disable.
137	ConfirmGate *core.ConfirmGate
138}
139
140// ChangelogPayload mirrors agent.ChangelogInfo without the import
141// cycle. The cli builds one from the http response, the tui opens
142// the overlay when one arrives.
143type ChangelogPayload struct {
144	Version string
145	Body    string
146	URL     string
147}
148
149// Interactive is the TUI chat loop.
150type Interactive struct {
151	cfg  InteractiveConfig
152	view *tui.View
153	ed   *tui.Editor
154	rend *tui.Renderer
155
156	mu        sync.Mutex
157	agent     *core.Agent
158	streaming strings.Builder // what's currently painted on screen
159	streamOn  bool
160
161	// streamPending is the runes buffered after each EvTextDelta that
162	// haven't yet been promoted into `streaming` for rendering. It
163	// exists because some provider paths (notably Anthropic via the
164	// oauth/subscription channel) coalesce the model's output into a
165	// few fat chunks instead of drip-streaming. Painting those fat
166	// chunks verbatim looks like the summary "just appears". The
167	// paintPace goroutine drains a handful of runes per tick from
168	// this buffer into `streaming`, giving every path the same
169	// typewriter feel regardless of upstream chunk size.
170	streamPending []rune
171	// streamFlushPending is set when EvAssistantMessage fires while
172	// streamPending still has unrendered runes. The ticker flushes
173	// them, then closes out the stream (clearing flags, resetting
174	// buffers) so the final paint matches the on-disk message.
175	streamFlushPending bool
176	toolCalls          map[string]*tui.ToolCallView
177	toolOrder          []string
178	statusErr          string
179	statusOK           string
180	helpBlock          []string // rendered above the chat when /help was typed
181	cumUsage           provider.Usage
182	lastCtxInput       int // input_tokens of the most recent turn — approximates current context size
183	busy               bool
184	dirty              chan struct{}
185	cancelTurn         context.CancelFunc
186	scrollOffset       int // rows from the bottom; 0 = pinned to latest
187
188	// Messages typed while a turn is in flight. Each is delivered as
189	// its own follow-up turn once the current one finishes. Rendered
190	// above the status bar as "sliding in: ..." chips.
191	queued []string
192
193	// runCtx is the top-level context passed to Run(). Follow-up turns
194	// drained from `queued` are started against this context so they
195	// survive past the ctx of the key event that enqueued them.
196	runCtx context.Context
197
198	// autoCompacting is true while a model-triggered compaction is in
199	// flight. Surfaced in the status bar so the user can tell a
200	// condense pass from a regular assistant turn.
201	autoCompacting bool
202
203	// updateInfo is the result of the async update check. Zero value
204	// while the check hasn't completed or nothing is available.
205	updateInfo UpdateInfo
206
207	dialog            *loginDialog
208	modelDialog       *modelDialog
209	sessionDialog     *sessionDialog
210	jumpDialog        *jumpDialog
211	btwDialog         *btwDialog
212	skillsDialog      *skillsDialog
213	changelogDialog   *changelogDialog
214	confirmDialog     *confirmDialog
215	logoutDialog      *logoutDialog
216	telegramDialog    *telegramDialog
217	telegramBridge    *telegram.Bridge
218	sessionOpsDialog  *sessionOpsDialog
219	sessionTreeDialog *sessionTreeDialog
220
221	// pendingFork is true when the user ran /session fork: the next
222	// jump-picker selection should branch off that message instead
223	// of scrolling. Flag resets after the action fires or the dialog
224	// is dismissed, so repeated /jump calls don't turn into forks.
225	pendingFork bool
226	suggest     *slashSuggester
227	spin        *spinner
228
229	// parkedTurn is the 1-based turn number the viewport is currently
230	// scrolled to by /jump. 0 = not parked, showing the tail as usual.
231	// Rendered as a muted footer at the bottom of the chat so users
232	// don't forget they're looking at history.
233	parkedTurn  int
234	parkedTotal int
235
236	// lastCtrlC is when the user last pressed ctrl+c. The first press
237	// clears the editor / cancels a turn / shows a hint; a second press
238	// within ctrlCExitWindow exits. Mirrors the python-repl convention.
239	lastCtrlC time.Time
240
241	// welcomeStart is when the interactive run began. The welcome
242	// banner shows the binary version for welcomeVersionDuration
243	// after this point and reverts to plain text after.
244	welcomeStart time.Time
245
246	// extNotes are one-shot styled lines pushed by extensions via
247	// Notify / Display. They live above the editor (just below the
248	// transcript) until cleared by /clear or another reset.
249	extNotes []string
250}
251
252// welcomeVersionDuration is how long the welcome banner shows the
253// version suffix before reverting to the plain headline. 1.5s is
254// enough to read at a glance and keeps the splash short.
255const welcomeVersionDuration = 1500 * time.Millisecond
256
257// NewInteractive constructs an Interactive from cfg.
258func NewInteractive(cfg InteractiveConfig) *Interactive {
259	i := &Interactive{
260		cfg: cfg,
261		view: &tui.View{
262			Theme:      cfg.Theme,
263			ImageProto: tui.DetectImageProtocol(),
264		},
265		ed:                tui.NewEditor(cfg.Theme.FG256(cfg.Theme.Accent, "▌ ")),
266		rend:              tui.NewRenderer(cfg.Terminal),
267		toolCalls:         map[string]*tui.ToolCallView{},
268		dirty:             make(chan struct{}, 8),
269		dialog:            newLoginDialog(),
270		modelDialog:       newModelDialog(),
271		sessionDialog:     newSessionDialog(),
272		jumpDialog:        newJumpDialog(),
273		btwDialog:         newBtwDialog(),
274		skillsDialog:      newSkillsDialog(),
275		changelogDialog:   newChangelogDialog(),
276		confirmDialog:     newConfirmDialog(),
277		logoutDialog:      newLogoutDialog(),
278		telegramDialog:    newTelegramDialog(),
279		sessionOpsDialog:  newSessionOpsDialog(),
280		sessionTreeDialog: newSessionTreeDialog(),
281		suggest:           newSlashSuggester(),
282		spin:              newSpinner(),
283	}
284	if cfg.Agent != nil {
285		i.agent = cfg.Agent
286		i.view.Messages = cfg.Agent.Messages()
287	}
288	return i
289}
290
291// Run blocks until the user quits.
292func (i *Interactive) Run(ctx context.Context) error {
293	i.runCtx = ctx
294	term := i.cfg.Terminal
295	restore, err := term.EnterRaw()
296	if err != nil {
297		return err
298	}
299	defer restore()
300	defer func() {
301		if i.telegramBridge != nil {
302			i.telegramBridge.Stop()
303		}
304	}()
305
306	_, _ = term.Write([]byte(tui.SeqBracketedPasteOn))
307	_, _ = term.Write([]byte(tui.SeqAltScreenOn))
308	defer term.Write([]byte(tui.SeqAltScreenOff + tui.SeqBracketedPasteOff + tui.SeqShowCursor))
309
310	// Streaming pacer: drains buffered text deltas at a steady rate
311	// so typewriter feel is identical across providers regardless of
312	// upstream chunk size. Starts here so it lives for the whole
313	// session and exits with ctx.
314	go i.runStreamPacer(ctx)
315
316	cols, rows := term.Size()
317	i.rend.Resize(cols, rows)
318	term.OnResize(func() {
319		c, r := term.Size()
320		i.rend.Resize(c, r)
321		// Force an immediate redraw on resize. The throttled invalidate
322		// path is fine for animation, but a window resize is a discrete
323		// user action where any visible delay (or stale frame) reads as
324		// brokenness. redraw() is mutex-safe; the worst that happens is
325		// a duplicate paint if the throttler is mid-flight, which is
326		// invisible.
327		i.redraw()
328	})
329
330	if i.cfg.InitialInput != "" {
331		i.ed.SetValue(i.cfg.InitialInput)
332	}
333
334	// Stamp the welcome time and schedule a one-shot redraw at the
335	// expiry so the version suffix disappears on its own even if the
336	// user hasn't typed anything yet.
337	i.welcomeStart = time.Now()
338	time.AfterFunc(welcomeVersionDuration, i.invalidate)
339
340	// If the agent was constructed with a pre-loaded transcript
341	// (--continue, --resume, --session) park the viewport on the
342	// most recent turn so the user lands looking at where the
343	// previous session left off rather than at the bottom of an
344	// already-rendered final reply.
345	if i.agent != nil {
346		if msgs := i.agent.Messages(); len(msgs) > 0 {
347			i.scrollToLastTurn(msgs)
348		}
349	}
350
351	// No credential at startup? Auto-open the login dialog, and mark
352	// the status line. The user can Esc out of the dialog if they
353	// want to dismiss it (e.g. to check /help or /exit first).
354	if i.agent == nil {
355		i.statusErr = "not logged in. pick a login method below or press esc to dismiss."
356		i.dialog.Open()
357	}
358
359	// Input goroutine.
360	keys := make(chan tui.Key, 8)
361	go func() {
362		reader := tui.NewReaderWithPeek(term.ReadByte, term.PeekByteTimeout)
363		for {
364			k, err := reader.Read()
365			if err != nil {
366				return
367			}
368			keys <- k
369		}
370	}()
371
372	// Subscribe to auth events.
373	var authEvents <-chan auth.Event
374	if i.cfg.AuthManager != nil {
375		authEvents = i.cfg.AuthManager.Events()
376	}
377
378	// Animation ticker: drives spinner and dialog-related redraws when
379	// nothing else changed. 120ms is slow enough that highlighting a huge
380	// transcript doesn't spin the cpu.
381	tick := time.NewTicker(120 * time.Millisecond)
382	defer tick.Stop()
383
384	// Redraw throttle: coalesce bursts of invalidate() calls so we paint
385	// at most once every redrawMinInterval. Huge tool-result dumps can
386	// fire hundreds of invalidations while the user is typing; without
387	// this, the input goroutine never gets CPU and keystrokes lag.
388	const redrawMinInterval = 16 * time.Millisecond
389	var lastRedraw time.Time
390	var pendingRedraw bool
391	var pendingTimer *time.Timer
392
393	drainPending := func() {
394		if pendingTimer != nil {
395			pendingTimer.Stop()
396			pendingTimer = nil
397		}
398		if pendingRedraw {
399			pendingRedraw = false
400			lastRedraw = time.Now()
401			i.redraw()
402		}
403	}
404
405	requestRedraw := func() {
406		since := time.Since(lastRedraw)
407		if since >= redrawMinInterval {
408			// Redrawing right now subsumes any pending redraw, so clear
409			// the throttle state. Without this, a pending flag stays
410			// stuck at true and subsequent invalidate() calls within
411			// redrawMinInterval get dropped — which is exactly how the
412			// final "turn finished" frame went missing until the user
413			// nudged the ui by typing or scrolling.
414			if pendingTimer != nil {
415				pendingTimer.Stop()
416			}
417			pendingRedraw = false
418			lastRedraw = time.Now()
419			i.redraw()
420			return
421		}
422		if pendingRedraw {
423			return // already scheduled
424		}
425		pendingRedraw = true
426		wait := redrawMinInterval - since
427		if pendingTimer == nil {
428			pendingTimer = time.AfterFunc(wait, func() {
429				// Poke the dirty channel so the main loop wakes and
430				// drains the pending redraw on its own goroutine. We
431				// can't call drainPending here directly — it touches
432				// closure state shared with the main loop.
433				i.invalidate()
434			})
435		} else {
436			pendingTimer.Reset(wait)
437		}
438	}
439
440	i.invalidate()
441
442	updates := i.cfg.UpdateInfoChan  // nil-safe; nil channel blocks forever in select
443	changelog := i.cfg.ChangelogChan // single-shot, see case below
444
445	for {
446		select {
447		case <-ctx.Done():
448			return ctx.Err()
449		case k := <-keys:
450			if done := i.handleKey(ctx, k); done {
451				return nil
452			}
453			i.invalidate()
454		case ev := <-authEvents:
455			i.handleAuthEvent(ev)
456			i.invalidate()
457		case info, ok := <-updates:
458			if ok && info.Available {
459				i.mu.Lock()
460				i.updateInfo = info
461				i.mu.Unlock()
462				i.invalidate()
463			}
464			updates = nil // single-shot; subsequent iterations skip this case
465		case cl, ok := <-changelog:
466			if ok && cl.Body != "" {
467				i.changelogDialog.Open(cl.Version, cl.URL, cl.Body)
468				i.invalidate()
469			}
470			changelog = nil // single-shot
471		case <-i.dirty:
472			requestRedraw()
473		case <-tick.C:
474			// Always drain a pending redraw on the tick. This is the
475			// safety net that catches the case where the dirty channel
476			// was saturated when the final "turn finished" invalidate
477			// fired, or where the throttle scheduled a deferred redraw
478			// and the AfterFunc-driven invalidate got dropped on a
479			// full channel.
480			drainPending()
481			if i.busy || i.dialog.Active() || i.modelDialog.Active() || i.sessionDialog.Active() || i.jumpDialog.Active() || i.btwDialog.Active() || i.skillsDialog.Active() || i.changelogDialog.Active() || i.confirmDialog.Active() || i.logoutDialog.Active() || i.telegramDialog.Active() || i.sessionOpsDialog.Active() || i.sessionTreeDialog.Active() {
482				requestRedraw() // keep the spinner / dialog animation moving
483			}
484		}
485	}
486}
487
488func (i *Interactive) invalidate() {
489	select {
490	case i.dirty <- struct{}{}:
491	default:
492	}
493}
494
495// lastCols returns the current terminal width in columns.
496func (i *Interactive) lastCols() int {
497	cols, _ := i.cfg.Terminal.Size()
498	return cols
499}
500
501// chatPage returns the number of chat rows currently visible, used
502// as the page size for PageUp/PageDown.
503func (i *Interactive) chatPage() int {
504	_, rows := i.cfg.Terminal.Size()
505	p := rows - 6 // rough reservation for status + editor + a dialog line
506	if p < 4 {
507		p = 4
508	}
509	return p
510}
511
512// scrollBy adjusts the scroll offset. Positive = up (into history).
513// Clearing the parked-turn label when we're back at the bottom means
514// the "viewing turn N" footer goes away automatically as soon as you
515// scroll back to the live tail.
516func (i *Interactive) scrollBy(delta int) {
517	i.mu.Lock()
518	i.scrollOffset += delta
519	if i.scrollOffset < 0 {
520		i.scrollOffset = 0
521	}
522	if i.scrollOffset == 0 {
523		i.parkedTurn = 0
524		i.parkedTotal = 0
525	}
526	i.mu.Unlock()
527	i.invalidate()
528}
529
530// scrollToBottom pins the view to the latest content.
531func (i *Interactive) scrollToBottom() {
532	i.mu.Lock()
533	i.scrollOffset = 0
534	i.parkedTurn = 0
535	i.parkedTotal = 0
536	i.mu.Unlock()
537	i.invalidate()
538}
539
540func (i *Interactive) redraw() {
541	i.mu.Lock()
542	defer i.mu.Unlock()
543
544	cols, _ := i.cfg.Terminal.Size()
545	if i.agent != nil {
546		i.view.Messages = i.agent.Messages()
547	} else {
548		i.view.Messages = nil
549	}
550	// Pacer flush: while the streaming pacer is still draining the
551	// buffer (i.e. EvAssistantMessage already fired but more runes
552	// are queued), the final assistant message is already in
553	// i.agent.Messages() in full. Painting it in the transcript
554	// AND the streaming block at the same time shows the user the
555	// complete text immediately — which defeats the whole pacer.
556	// Hide the last message until the pacer catches up; once the
557	// flush-pending latch clears, the message is revealed (the
558	// streaming block disappears the same frame because streamOn
559	// flips off, so the transition is seamless).
560	if i.streamFlushPending && len(i.view.Messages) > 0 {
561		i.view.Messages = i.view.Messages[:len(i.view.Messages)-1]
562	}
563	i.view.Streaming = i.streaming.String()
564	i.view.StreamingActive = i.streamOn
565	// Guard against the narrow race where EvAssistantMessage has
566	// just promoted a streaming reply into the transcript but a
567	// render tick hasn't flipped streamOn off yet. Without the
568	// guard, the same text would appear twice (once as the
569	// in-flight streaming block, once as the last transcript
570	// message). We detect the duplicate strictly: the last
571	// assistant message's visible text must equal the streaming
572	// buffer. Just matching on role is too broad — it also hides
573	// the next round's typewriter streaming after a tool turn,
574	// because the last transcript message is always assistant
575	// (the tool-use block) until the follow-up summary lands.
576	if i.streamOn && i.streaming.Len() > 0 {
577		if n := len(i.view.Messages); n > 0 && i.view.Messages[n-1].Role == provider.RoleAssistant {
578			if assistantText(i.view.Messages[n-1]) == i.streaming.String() {
579				i.view.StreamingActive = false
580			}
581		}
582	}
583	// Live tool-call view: only shown while a turn is in flight. Once
584	// the agent is idle, every tool call has already been folded into
585	// the transcript (as assistant.ToolCallBlock + a tool-role message),
586	// so showing v.ToolCalls a second time would duplicate them below
587	// the final assistant text — which looks like the summary came
588	// "before" the tools.
589	i.view.ToolCalls = i.view.ToolCalls[:0]
590	if i.busy {
591		for _, id := range i.toolOrder {
592			if tc, ok := i.toolCalls[id]; ok {
593				i.view.ToolCalls = append(i.view.ToolCalls, *tc)
594			}
595		}
596	}
597	i.view.Err = i.statusErr
598
599	chat := i.view.Build(cols)
600
601	// Welcome banner: shown at the top of the chat area when there is
602	// no transcript yet. Disappears after the first message is sent.
603	// The version suffix is shown for welcomeVersionDuration after
604	// startup, then drops off automatically.
605	if len(i.view.Messages) == 0 && !i.streamOn && len(i.toolOrder) == 0 {
606		showVer := !i.welcomeStart.IsZero() && time.Since(i.welcomeStart) < welcomeVersionDuration
607		chat = append(welcomeBanner(i.cfg.Theme, i.cfg.Version, showVer), chat...)
608	}
609
610	// Update-available banner: prepended above everything else so it's
611	// the first thing the user sees when opening a new zot session.
612	// Once rendered, it stays until the user updates to a newer
613	// version — we don't persist a "dismissed" flag because this is
614	// cheap and re-showing it is how most users remember to update.
615	if i.updateInfo.Available {
616		banner := renderUpdateBanner(i.cfg.Theme, i.updateInfo, cols)
617		chat = append(banner, chat...)
618	}
619
620	// /help block: appended to the transcript so it appears at the
621	// bottom of the chat area (right above the status bar / editor).
622	// Prepending it would push long conversations off the top of the
623	// viewport, which users would miss entirely.
624	if len(i.helpBlock) > 0 {
625		chat = append(chat, i.helpBlock...)
626	}
627
628	if i.statusOK != "" {
629		// Hard-truncate the OK line to the visible width so a long
630		// session path ("resumed session: /Users/.../sessions/...")
631		// doesn't overflow past the right edge and look broken on a
632		// narrow terminal.
633		line := "✓ " + i.statusOK
634		if cols > 4 && len(line) > cols {
635			line = line[:cols-1] + "…"
636		}
637		chat = append(chat, i.cfg.Theme.FG256(i.cfg.Theme.Tool, line), "")
638	}
639
640	// Extension notes (notify / display) live just under the
641	// transcript, above the dialog/editor band. Cleared by /clear.
642	if len(i.extNotes) > 0 {
643		chat = append(chat, i.extNotes...)
644		chat = append(chat, "")
645	}
646
647	// Dialogs (login or model picker) render between chat and the editor.
648	var dialog []string
649	switch {
650	case i.dialog.Active():
651		dialog = i.dialog.Render(i.cfg.Theme, cols)
652	case i.modelDialog.Active():
653		dialog = i.modelDialog.Render(i.cfg.Theme, cols)
654	case i.sessionDialog.Active():
655		// Reserve rows for the editor (~3), status line (1-2),
656		// dialog chrome (header + hint + rule + indicators, ~5),
657		// and leave the remainder for session rows. Minimum of 3
658		// rows so even a very small terminal shows something.
659		_, rows := i.cfg.Terminal.Size()
660		avail := rows - 12
661		if avail < 3 {
662			avail = 3
663		}
664		i.sessionDialog.MaxRows = avail
665		dialog = i.sessionDialog.Render(i.cfg.Theme, cols)
666	case i.jumpDialog.Active():
667		dialog = i.jumpDialog.Render(i.cfg.Theme, cols)
668	case i.btwDialog.Active():
669		dialog = i.btwDialog.Render(i.cfg.Theme, cols)
670	case i.skillsDialog.Active():
671		dialog = i.skillsDialog.Render(i.cfg.Theme, cols)
672	case i.changelogDialog.Active():
673		dialog = i.changelogDialog.Render(i.cfg.Theme, cols)
674	case i.confirmDialog.Active():
675		dialog = i.confirmDialog.Render(i.cfg.Theme, cols)
676	case i.logoutDialog.Active():
677		dialog = i.logoutDialog.Render(i.cfg.Theme, cols)
678	case i.telegramDialog.Active():
679		dialog = i.telegramDialog.Render(i.cfg.Theme, cols)
680	case i.sessionOpsDialog.Active():
681		dialog = i.sessionOpsDialog.Render(i.cfg.Theme, cols)
682	case i.sessionTreeDialog.Active():
683		dialog = i.sessionTreeDialog.Render(i.cfg.Theme, cols)
684	}
685
686	// Slash-command autocomplete: popup above the status line, only
687	// when the editor starts with "/" and no dialog is already open.
688	// Feed extension-registered commands into the suggester first so
689	// they show up in tab-complete + the popup alongside the built-ins.
690	if i.cfg.Extensions != nil {
691		catalog := i.cfg.Extensions.Commands()
692		extra := make([]slashCommand, 0, len(catalog))
693		for _, c := range catalog {
694			// The popup renders extension commands under a dedicated
695			// "── extensions ───" divider, so the description doesn't
696			// need to repeat the source. If the description is empty,
697			// fall back to the extension name so the row isn't blank.
698			desc := c.Description
699			if strings.TrimSpace(desc) == "" {
700				desc = "(" + c.Extension + ")"
701			}
702			extra = append(extra, slashCommand{
703				Name: "/" + c.Name,
704				Desc: desc,
705			})
706		}
707		i.suggest.SetExtra(extra)
708	}
709	var suggest []string
710	currentInput := i.ed.Value()
711	if len(dialog) == 0 && i.suggest.Active(currentInput) && !i.busy {
712		suggest = i.suggest.Render(currentInput, i.cfg.Theme, cols)
713	}
714
715	// Busy prefix shown at the far left of the status bar. The
716	// spinner glyph and its funny-line message share the `zot`
717	// label colour (Theme.Assistant) so the whole "who's working"
718	// band reads at a glance. Elapsed time stays muted because it
719	// drifts every second and shouldn't grab focus.
720	var busyPrefix string
721	if i.busy {
722		busyPrefix = fmt.Sprintf("%s %s · %s",
723			i.cfg.Theme.FG256(i.cfg.Theme.Assistant, i.spin.Frame()),
724			i.cfg.Theme.FG256(i.cfg.Theme.Assistant, i.spin.Message()),
725			i.cfg.Theme.FG256(i.cfg.Theme.Muted, i.spin.Elapsed().String()),
726		)
727	}
728
729	ctxMax := 0
730	if m, err := provider.FindModel(i.cfg.Provider, i.cfg.Model); err == nil {
731		ctxMax = m.ContextWindow
732	}
733	statusLines := tui.StatusBar(tui.StatusBarParams{
734		Theme:          i.cfg.Theme,
735		Provider:       i.cfg.Provider,
736		Model:          i.cfg.Model,
737		Busy:           i.busy,
738		BusyPrefix:     busyPrefix,
739		CWD:            i.cfg.CWD,
740		Locked:         i.cfg.Sandbox.Locked(),
741		Usage:          i.cumUsage,
742		Subscription:   i.cfg.AuthMethod == "oauth",
743		ContextUsed:    i.lastCtxInput,
744		ContextMax:     ctxMax,
745		AutoCompacting: i.autoCompacting,
746		Telegram:       i.telegramBridge != nil && i.telegramBridge.Active(),
747		Cols:           cols,
748	})
749	edLines, curR, curC := i.ed.Render(cols)
750
751	// "Sliding in" chips for messages the user typed while a turn is
752	// in flight. Shown directly above the status bar so they're close
753	// to the editor but don't push the chat around.
754	var queue []string
755	if len(i.queued) > 0 {
756		for _, q := range i.queued {
757			label := i.cfg.Theme.FG256(i.cfg.Theme.Accent, "▸ sliding in: ")
758			text := truncateLine(q, cols-15)
759			queue = append(queue, label+i.cfg.Theme.FG256(i.cfg.Theme.Muted, text))
760		}
761	}
762
763	// Bottom-sticky sections (always visible, never scroll).
764	bottom := make([]string, 0, len(dialog)+len(suggest)+len(queue)+len(edLines)+1)
765	bottom = append(bottom, dialog...)
766	bottom = append(bottom, suggest...)
767	bottom = append(bottom, queue...)
768	bottom = append(bottom, statusLines...)
769	bottom = append(bottom, edLines...)
770
771	_, rows := i.cfg.Terminal.Size()
772	chatRows := rows - len(bottom)
773	if chatRows < 1 {
774		chatRows = 1
775	}
776
777	// Apply scroll offset to the chat slice.
778	maxOffset := len(chat) - chatRows
779	if maxOffset < 0 {
780		maxOffset = 0
781	}
782	if i.scrollOffset > maxOffset {
783		i.scrollOffset = maxOffset
784	}
785	if i.scrollOffset < 0 {
786		i.scrollOffset = 0
787	}
788
789	var visibleChat []string
790	if len(chat) <= chatRows {
791		visibleChat = chat
792	} else {
793		end := len(chat) - i.scrollOffset
794		start := end - chatRows
795		if start < 0 {
796			start = 0
797		}
798		visibleChat = chat[start:end]
799	}
800
801	// A tiny "scrolled up" indicator in the top-right of the chat pane
802	// so you know you're not at the bottom. When the viewport was
803	// parked by /jump we include the turn number so the user remembers
804	// they're reading history rather than the live conversation.
805	if i.scrollOffset > 0 && len(visibleChat) > 0 {
806		var text string
807		if i.parkedTurn > 0 && i.parkedTotal > 0 {
808			text = fmt.Sprintf("  ↑ viewing turn %d of %d · %d lines more below (pgdn / end)",
809				i.parkedTurn, i.parkedTotal, i.scrollOffset)
810		} else {
811			text = fmt.Sprintf("  ↑ %d lines more below (end to jump)", i.scrollOffset)
812		}
813		note := i.cfg.Theme.FG256(i.cfg.Theme.Muted, text)
814		visibleChat = append([]string{note}, visibleChat...)
815		if len(visibleChat) > chatRows {
816			visibleChat = visibleChat[:chatRows]
817		}
818	}
819
820	frame := make([]string, 0, len(visibleChat)+len(bottom))
821	frame = append(frame, visibleChat...)
822	frame = append(frame, bottom...)
823
824	cursorRow := len(visibleChat) + len(dialog) + len(suggest) + len(queue) + len(statusLines) + curR
825	cursorCol := curC
826	i.rend.Draw(frame, cursorRow, cursorCol)
827}
828
829// truncateLine shortens s so it fits within n display cells, with an
830// ellipsis if trimmed. Used by the "sliding in" chips so a pasted
831// novel doesn't blow past the status line.
832func truncateLine(s string, n int) string {
833	if n <= 0 {
834		return ""
835	}
836	// Collapse newlines — chips are single line.
837	s = strings.ReplaceAll(s, "\n", " ↩ ")
838	runes := []rune(s)
839	if len(runes) <= n {
840		return s
841	}
842	if n <= 1 {
843		return "…"
844	}
845	return string(runes[:n-1]) + "…"
846}
847
848// ctrlCExitWindow is how long after a ctrl+c press a *second* press
849// will exit instead of just clearing input. Long enough to be
850// deliberate (rules out accidental key chord), short enough that the
851// hint stays meaningful.
852const ctrlCExitWindow = 2 * time.Second
853
854// armCtrlCExit records the timestamp of the current ctrl+c so the next
855// one within ctrlCExitWindow exits.
856func (i *Interactive) armCtrlCExit() {
857	i.mu.Lock()
858	i.lastCtrlC = time.Now()
859	i.mu.Unlock()
860}
861
862// ctrlCExitArmed reports whether a previous ctrl+c was recent enough
863// that another press should now exit.
864func (i *Interactive) ctrlCExitArmed() bool {
865	i.mu.Lock()
866	t := i.lastCtrlC
867	i.mu.Unlock()
868	return !t.IsZero() && time.Since(t) <= ctrlCExitWindow
869}
870
871func (i *Interactive) handleKey(ctx context.Context, k tui.Key) (done bool) {
872	// Any key that isn't ctrl+c invalidates an armed ctrl+c-exit, so
873	// pressing ctrl+c then typing then ctrl+c much later doesn't quit
874	// unexpectedly. The hint message also goes stale; clear it.
875	if k.Kind != tui.KeyCtrlC {
876		i.mu.Lock()
877		if !i.lastCtrlC.IsZero() {
878			i.lastCtrlC = time.Time{}
879			if strings.HasPrefix(i.statusOK, "input cleared") || strings.HasPrefix(i.statusOK, "press ctrl+c") {
880				i.statusOK = ""
881			}
882		}
883		i.mu.Unlock()
884	}
885
886	// Dialogs consume keys while open (except ctrl+c, which always closes them).
887
888	// Confirm dialog has highest priority: the agent goroutine is
889	// blocked waiting for an answer, so we must not let keys leak
890	// anywhere else while it's up.
891	if i.confirmDialog.Active() {
892		i.confirmDialog.HandleKey(k)
893		i.invalidate()
894		return false
895	}
896	if i.dialog.Active() {
897		if k.Kind == tui.KeyCtrlC {
898			i.dialog.Close()
899			if i.cfg.AuthManager != nil {
900				i.cfg.AuthManager.CancelOAuth()
901			}
902			return false
903		}
904		act := i.dialog.HandleKey(k)
905		if act.StartAPIKey {
906			i.startAPIKeyFlow(act.Provider)
907		}
908		if act.StartOAuth {
909			i.startOAuthFlow(act.Provider)
910		}
911		return false
912	}
913	if i.modelDialog.Active() {
914		if k.Kind == tui.KeyCtrlC {
915			i.modelDialog.Close()
916			return false
917		}
918		act := i.modelDialog.HandleKey(k)
919		if act.Select {
920			i.applyModelSelection(act.Provider, act.Model)
921		}
922		return false
923	}
924	if i.sessionDialog.Active() {
925		if k.Kind == tui.KeyCtrlC {
926			i.sessionDialog.Close()
927			return false
928		}
929		act := i.sessionDialog.HandleKey(k)
930		if act.Select {
931			i.applySessionSelection(act.Path)
932		}
933		return false
934	}
935	if i.logoutDialog.Active() {
936		if k.Kind == tui.KeyCtrlC {
937			i.logoutDialog.Close()
938			i.invalidate()
939			return false
940		}
941		act := i.logoutDialog.HandleKey(k)
942		if act.Select {
943			i.doLogout(act.Target)
944		}
945		i.invalidate()
946		return false
947	}
948	if i.telegramDialog.Active() {
949		if k.Kind == tui.KeyCtrlC {
950			i.telegramDialog.Close()
951			i.invalidate()
952			return false
953		}
954		act := i.telegramDialog.HandleKey(k)
955		if act.Select {
956			i.doTelegram(act.Action)
957		}
958		i.invalidate()
959		return false
960	}
961	if i.sessionOpsDialog.Active() {
962		if k.Kind == tui.KeyCtrlC {
963			i.sessionOpsDialog.Close()
964			i.invalidate()
965			return false
966		}
967		act := i.sessionOpsDialog.HandleKey(k)
968		if act.Select {
969			i.doSessionOp(act.Action, "")
970		}
971		i.invalidate()
972		return false
973	}
974	if i.sessionTreeDialog.Active() {
975		if k.Kind == tui.KeyCtrlC {
976			i.sessionTreeDialog.Close()
977			i.invalidate()
978			return false
979		}
980		act := i.sessionTreeDialog.HandleKey(k)
981		if act.Select {
982			i.applySessionTreeSelection(act.Path)
983		}
984		i.invalidate()
985		return false
986	}
987	if i.jumpDialog.Active() {
988		if k.Kind == tui.KeyCtrlC {
989			i.jumpDialog.Close()
990			i.pendingFork = false
991			return false
992		}
993		act := i.jumpDialog.HandleKey(k)
994		if act.Select {
995			if i.pendingFork {
996				i.applyForkSelection(act.MessageIdx)
997			} else {
998				i.applyJumpSelection(act.MessageIdx, act.TurnNo)
999			}
1000		}
1001		// If the user dismissed the dialog without selecting, also
1002		// clear the pending-fork flag so a later plain /jump isn't
1003		// hijacked.
1004		if act.Close {
1005			i.pendingFork = false
1006		}
1007		return false
1008	}
1009	if i.btwDialog.Active() {
1010		if k.Kind == tui.KeyCtrlC {
1011			i.btwDialog.Close()
1012			i.invalidate()
1013			return false
1014		}
1015		i.btwDialog.HandleKey(k, i.invalidate)
1016		return false
1017	}
1018	if i.skillsDialog.Active() {
1019		if k.Kind == tui.KeyCtrlC {
1020			i.skillsDialog.Close()
1021			i.invalidate()
1022			return false
1023		}
1024		i.skillsDialog.HandleKey(k)
1025		i.invalidate()
1026		return false
1027	}
1028	if i.changelogDialog.Active() {
1029		if closed := i.changelogDialog.HandleKey(k); closed {
1030			// User dismissed; let the parent persist the
1031			// LastChangelogShown marker via the close callback.
1032			if i.cfg.OnChangelogDismiss != nil {
1033				i.cfg.OnChangelogDismiss()
1034			}
1035		}
1036		i.invalidate()
1037		return false
1038	}
1039
1040	// Global keys.
1041	switch k.Kind {
1042	case tui.KeyCtrlC:
1043		// While busy: do NOT cancel the turn. ctrl+c during a
1044		// running turn is almost always reflex muscle memory
1045		// ("be quiet" in a shell) rather than a deliberate
1046		// decision to kill a multi-minute model call that's
1047		// already cost tokens. Use esc to interrupt a turn; use
1048		// a deliberate double-ctrl+c to exit zot entirely. First
1049		// press arms the exit hint, second press within
1050		// ctrlCExitWindow quits.
1051		if i.busy {
1052			if i.ctrlCExitArmed() {
1053				return true
1054			}
1055			i.mu.Lock()
1056			i.statusOK = "press ctrl+c again to exit, esc to cancel the turn"
1057			i.statusErr = ""
1058			i.mu.Unlock()
1059			i.armCtrlCExit()
1060			return false
1061		}
1062		// Idle: first press clears the editor (and any queued
1063		// follow-up messages); a second press within ctrlCExitWindow
1064		// exits. With both an empty editor and no queue the first
1065		// press still just arms — require a deliberate double-tap.
1066		hadInput := !i.ed.IsEmpty() || len(i.queued) > 0
1067		if hadInput {
1068			i.ed.Clear()
1069			i.suggest.Reset()
1070			i.mu.Lock()
1071			i.queued = nil
1072			i.statusOK = "input cleared"
1073			i.statusErr = ""
1074			i.mu.Unlock()
1075			i.armCtrlCExit()
1076			return false
1077		}
1078		if i.ctrlCExitArmed() {
1079			return true
1080		}
1081		i.mu.Lock()
1082		i.statusOK = "press ctrl+c again to exit"
1083		i.statusErr = ""
1084		i.mu.Unlock()
1085		i.armCtrlCExit()
1086		return false
1087	case tui.KeyEsc:
1088		// Esc interrupts a running turn. When idle, fall through so the
1089		// editor can clear itself.
1090		if i.busy && i.cancelTurn != nil {
1091			i.cancelTurn()
1092			// If a confirm dialog is pending, refuse it so the agent
1093			// goroutine unblocks and the context cancellation can
1094			// actually take effect.
1095			i.confirmDialog.CancelAll("turn cancelled")
1096			return false
1097		}
1098	case tui.KeyCtrlD:
1099		if i.ed.IsEmpty() && !i.busy {
1100			return true
1101		}
1102	case tui.KeyCtrlL:
1103		i.rend.Clear()
1104		i.invalidate()
1105		return false
1106	case tui.KeyCtrlO:
1107		// Toggle expansion of collapsed tool results. Affects every tool
1108		// call in the transcript — press again to re-collapse.
1109		i.mu.Lock()
1110		i.view.ExpandAll = !i.view.ExpandAll
1111		i.mu.Unlock()
1112		i.invalidate()
1113		return false
1114	case tui.KeyPageUp:
1115		i.scrollBy(+i.chatPage())
1116		return false
1117	case tui.KeyPageDown:
1118		i.scrollBy(-i.chatPage())
1119		return false
1120	case tui.KeyUp:
1121		// Wheel-up in alt screen sends Up arrows on most terminals.
1122		// When the editor is empty we use up/down for chat scroll —
1123		// independently of whether the agent is busy, so users can
1124		// scroll back through long streaming replies while they run.
1125		if i.ed.IsEmpty() {
1126			i.scrollBy(+3)
1127			return false
1128		}
1129	case tui.KeyDown:
1130		if i.ed.IsEmpty() {
1131			if i.scrollOffset > 0 {
1132				i.scrollBy(-3)
1133			}
1134			return false
1135		}
1136	}
1137
1138	// Note: we intentionally do NOT gate the editor on i.busy here.
1139	// Typing while the agent is working is supported — submitted
1140	// messages are queued and delivered as follow-up turns when the
1141	// current turn ends. See the submit handler below.
1142
1143	if k.Kind == tui.KeyEnter && k.Alt {
1144		i.ed.HandleKey(tui.Key{Kind: tui.KeyRune, Rune: '\n', Alt: true})
1145		return false
1146	}
1147
1148	// Slash suggestions: intercept up/down/tab/enter when the popup is visible.
1149	if i.suggest.Active(i.ed.Value()) {
1150		switch k.Kind {
1151		case tui.KeyUp:
1152			i.suggest.Up()
1153			return false
1154		case tui.KeyDown:
1155			i.suggest.Down()
1156			return false
1157		case tui.KeyTab:
1158			if name := i.suggest.Selection(i.ed.Value()); name != "" {
1159				i.ed.SetValue(name)
1160				i.suggest.Reset()
1161			}
1162			return false
1163		case tui.KeyEnter:
1164			// Enter on an ambiguous or partial slash prefix: complete to the
1165			// currently highlighted command and run it. That way typing
1166			// "/lo" + enter picks whichever of /login or /logout is selected
1167			// in the popup instead of submitting "/lo" as unknown. Also
1168			// clear the editor so the command doesn't linger after the
1169			// dialog opens/closes.
1170			if name := i.suggest.Selection(i.ed.Value()); name != "" {
1171				i.ed.PushHistory(name)
1172				i.ed.Clear()
1173				i.suggest.Reset()
1174				return i.runSlash(ctx, name)
1175			}
1176		case tui.KeyEsc:
1177			i.ed.Clear()
1178			i.suggest.Reset()
1179			return false
1180		}
1181	}
1182
1183	if submit := i.ed.HandleKey(k); submit {
1184		text := strings.TrimRight(i.ed.Value(), "\n")
1185		if text == "" {
1186			return false
1187		}
1188		i.ed.PushHistory(text)
1189		i.ed.Clear()
1190		i.suggest.Reset()
1191
1192		if looksLikeSlashCommand(text) {
1193			head := text
1194			rest := ""
1195			if idx := strings.IndexAny(text, " \t"); idx >= 0 {
1196				head = text[:idx]
1197				rest = strings.TrimSpace(text[idx:])
1198			}
1199			if !isKnownSlashCommand(text) {
1200				// Try extensions before giving up. Extensions register
1201				// commands by bare name (no leading slash); strip it here.
1202				extName := strings.TrimPrefix(head, "/")
1203				if i.cfg.Extensions != nil && i.cfg.Extensions.HasCommand(extName) {
1204					go i.invokeExtensionCommand(ctx, extName, rest)
1205					return false
1206				}
1207				i.mu.Lock()
1208				i.statusErr = "unknown command " + head + " — type /help to see the list"
1209				i.statusOK = ""
1210				i.mu.Unlock()
1211				return false
1212			}
1213			// Slash commands run regardless of busy state. Commands that
1214			// would mutate the transcript or replace the agent (/clear,
1215			// /compact, /logout, /login, /model) cancel the active turn
1216			// first and wait for the goroutine to wind down so they don't
1217			// race with a streaming response. Safe commands (/help,
1218			// /jump, /sessions, /jail, /unjail, /exit) run immediately
1219			// without disturbing the active turn.
1220			if slashCancelsTurn(head) {
1221				i.cancelAndWaitForIdle()
1222			}
1223			return i.runSlash(ctx, text)
1224		}
1225
1226		if i.agent == nil {
1227			i.mu.Lock()
1228			i.statusErr = "not logged in. type /login first."
1229			i.mu.Unlock()
1230			return false
1231		}
1232		// Mirror the user's typed prompt into the paired Telegram
1233		// chat (when the bridge is active) so the Telegram thread
1234		// stays a complete record of the session, not just the half
1235		// that originated on the phone. On a goroutine so the
1236		// network write doesn't delay the local turn.
1237		if i.telegramBridge != nil && i.telegramBridge.Active() {
1238			go i.telegramBridge.OnUserTyped(text)
1239		}
1240		// If a turn is already in flight, queue this prompt instead of
1241		// starting a second one. The drain loop at the end of startTurn
1242		// will pick it up when the current turn finishes.
1243		i.mu.Lock()
1244		if i.busy {
1245			i.queued = append(i.queued, text)
1246			i.mu.Unlock()
1247			i.invalidate()
1248			return false
1249		}
1250		i.mu.Unlock()
1251		i.startTurn(ctx, text)
1252	}
1253	return false
1254}
1255
1256// invokeExtensionCommand fires an extension-registered slash command
1257// in a background goroutine, awaits the response, and applies the
1258// requested action (prompt / insert / display / noop). Errors and
1259// timeouts surface as a status_err line.
1260func (i *Interactive) invokeExtensionCommand(ctx context.Context, name, args string) {
1261	resp, err := i.cfg.Extensions.Invoke(ctx, name, args, 30*time.Second)
1262	if err != nil {
1263		i.mu.Lock()
1264		i.statusErr = "extension /" + name + ": " + err.Error()
1265		i.statusOK = ""
1266		i.mu.Unlock()
1267		i.invalidate()
1268		return
1269	}
1270	if resp.Error != "" {
1271		i.mu.Lock()
1272		i.statusErr = "extension /" + name + ": " + resp.Error
1273		i.statusOK = ""
1274		i.mu.Unlock()
1275		i.invalidate()
1276		return
1277	}
1278	switch resp.Action {
1279	case "prompt":
1280		if strings.TrimSpace(resp.Prompt) == "" {
1281			return
1282		}
1283		i.startTurn(i.runCtx, resp.Prompt)
1284	case "insert":
1285		i.ed.Insert(resp.Insert)
1286		i.invalidate()
1287	case "display":
1288		i.appendExtensionNote(name, resp.Display, "info")
1289	case "noop", "":
1290		// nothing
1291	default:
1292		i.mu.Lock()
1293		i.statusErr = "extension /" + name + ": unknown action " + resp.Action
1294		i.mu.Unlock()
1295		i.invalidate()
1296	}
1297}
1298
1299// appendExtensionNote renders an extension-originated note in the
1300// chat. Levels: "info" (muted), "warn" (warning), "error" (error),
1301// "success" (tool/ok green).
1302func (i *Interactive) appendExtensionNote(extName, msg, level string) {
1303	if msg == "" {
1304		return
1305	}
1306	i.mu.Lock()
1307	defer i.mu.Unlock()
1308	color := i.cfg.Theme.Muted
1309	switch level {
1310	case "warn":
1311		color = i.cfg.Theme.Warning
1312	case "error":
1313		color = i.cfg.Theme.Error
1314	case "success":
1315		color = i.cfg.Theme.Tool
1316	}
1317	prefix := i.cfg.Theme.FG256(i.cfg.Theme.Accent, "["+extName+"] ")
1318	for _, line := range strings.Split(msg, "\n") {
1319		i.statusOK = "" // clear any stale ok
1320		i.statusErr = ""
1321		i.extNotes = append(i.extNotes, prefix+i.cfg.Theme.FG256(color, line))
1322	}
1323}
1324
1325// HostHooks implementation for the extension manager. The manager
1326// holds an interface, not a concrete *Interactive, so these methods
1327// are the only thing the manager sees.
1328
1329// Notify is the manager's NotifyFromExt entry point.
1330func (i *Interactive) Notify(extName, level, message string) {
1331	i.appendExtensionNote(extName, message, level)
1332	i.invalidate()
1333}
1334
1335// Submit feeds text through the agent loop as if the user had typed it.
1336func (i *Interactive) Submit(text string) {
1337	i.startTurn(i.runCtx, text)
1338}
1339
1340// SubmitOrQueue runs text immediately if the agent is idle, or
1341// appends it to the pending queue if a turn is already in flight.
1342// Used by the telegram bridge (and by the editor submit path) so
1343// both input sources share the same "queue behind an active turn"
1344// semantics. Images are ignored for now — only the text prompt is
1345// forwarded — because the queued-prompt path is text-only; a
1346// follow-up can expand the queue entry to carry images.
1347func (i *Interactive) SubmitOrQueue(text string, images []provider.ImageBlock) {
1348	_ = images // reserved for future queued-with-images support
1349	i.mu.Lock()
1350	if i.agent == nil {
1351		i.statusErr = "not logged in. type /login first."
1352		i.mu.Unlock()
1353		i.invalidate()
1354		return
1355	}
1356	if i.busy {
1357		i.queued = append(i.queued, text)
1358		i.mu.Unlock()
1359		i.invalidate()
1360		return
1361	}
1362	i.mu.Unlock()
1363	i.startTurn(i.runCtx, text)
1364}
1365
1366// CancelTurn aborts the active turn if one is running. Used by the
1367// telegram bridge when the paired user sends /stop.
1368func (i *Interactive) CancelTurn() {
1369	i.mu.Lock()
1370	cancel := i.cancelTurn
1371	i.mu.Unlock()
1372	if cancel != nil {
1373		cancel()
1374	}
1375}
1376
1377// Insert places text at the cursor in the editor.
1378func (i *Interactive) Insert(text string) {
1379	i.ed.Insert(text)
1380	i.invalidate()
1381}
1382
1383// Display appends a styled note from extName to the chat without a
1384// model call.
1385func (i *Interactive) Display(extName, text string) {
1386	i.appendExtensionNote(extName, text, "info")
1387	i.invalidate()
1388}
1389
1390func (i *Interactive) runSlash(ctx context.Context, cmd string) (done bool) {
1391	parts := strings.Fields(cmd)
1392	switch parts[0] {
1393	case "/exit":
1394		return true
1395	case "/clear":
1396		if i.agent != nil {
1397			i.agent.SetMessages(nil)
1398		}
1399		i.mu.Lock()
1400		i.toolCalls = map[string]*tui.ToolCallView{}
1401		i.toolOrder = nil
1402		i.statusErr = ""
1403		i.statusOK = ""
1404		i.helpBlock = nil
1405		i.parkedTurn = 0
1406		i.parkedTotal = 0
1407		i.scrollOffset = 0
1408		i.extNotes = nil
1409		i.view.InvalidateRenderCache()
1410		i.mu.Unlock()
1411	case "/help":
1412		i.mu.Lock()
1413		i.helpBlock = renderHelpBlock(i.cfg.Theme, i.lastCols())
1414		i.statusErr = ""
1415		i.statusOK = ""
1416		// Pin the viewport to the newest content so the help block,
1417		// which we just appended to the end of the transcript, is
1418		// what the user actually sees.
1419		i.scrollOffset = 0
1420		i.mu.Unlock()
1421	case "/login":
1422		i.dialog.Open()
1423	case "/logout":
1424		if len(parts) >= 2 {
1425			// Explicit target: /logout anthropic | openai | all
1426			i.doLogout(parts[1])
1427			break
1428		}
1429		// No arg: open the picker over whichever providers are
1430		// currently logged in. If nothing's logged in, bail with a
1431		// status line.
1432		i.openLogoutDialog()
1433	case "/model":
1434		if len(parts) >= 2 {
1435			i.applyModelSelection("", parts[1])
1436		} else {
1437			i.modelDialog.Open(i.cfg.Model)
1438		}
1439	case "/sessions":
1440		i.sessionDialog.Open(i.cfg.ZotHome, i.cfg.CWD)
1441	case "/jump":
1442		i.openJumpDialog(parts[1:])
1443	case "/btw":
1444		i.openBtwDialog(parts[1:])
1445	case "/skills":
1446		i.openSkillsDialog()
1447	case "/compact":
1448		i.runCompact(ctx, false)
1449	case "/jail":
1450		if i.cfg.Sandbox == nil {
1451			i.mu.Lock()
1452			i.statusErr = "sandbox not available in this build"
1453			i.mu.Unlock()
1454			break
1455		}
1456		i.cfg.Sandbox.Lock()
1457		i.mu.Lock()
1458		i.statusOK = "jailed to " + i.cfg.CWD + " (tools cannot touch paths outside this directory)"
1459		i.statusErr = ""
1460		i.mu.Unlock()
1461	case "/unjail":
1462		if i.cfg.Sandbox == nil {
1463			i.mu.Lock()
1464			i.statusErr = "sandbox not available in this build"
1465			i.mu.Unlock()
1466			break
1467		}
1468		i.cfg.Sandbox.Unlock()
1469		i.mu.Lock()
1470		i.statusOK = "unjailed"
1471		i.statusErr = ""
1472		i.mu.Unlock()
1473	case "/reload-ext":
1474		i.runReloadExt(ctx)
1475	case "/yolo":
1476		i.runYoloOn()
1477	case "/telegram", "/tg":
1478		if len(parts) >= 2 {
1479			i.doTelegram(parts[1])
1480			break
1481		}
1482		i.openTelegramDialog()
1483	case "/session":
1484		if len(parts) >= 2 {
1485			action := parts[1]
1486			arg := ""
1487			if len(parts) >= 3 {
1488				arg = strings.Join(parts[2:], " ")
1489			}
1490			i.doSessionOp(action, arg)
1491			break
1492		}
1493		i.openSessionOpsDialog()
1494	default:
1495		// Last-resort fallback: try the extension manager. Built-in
1496		// cases above always win; this branch only fires for slash
1497		// commands the extension manager registered. Same routing as
1498		// the editor's submit-handler dispatch path so the autocomplete
1499		// "enter on highlighted suggestion" flow also works.
1500		extName := strings.TrimPrefix(parts[0], "/")
1501		if i.cfg.Extensions != nil && i.cfg.Extensions.HasCommand(extName) {
1502			rest := ""
1503			if len(parts) > 1 {
1504				rest = strings.Join(parts[1:], " ")
1505			}
1506			go i.invokeExtensionCommand(ctx, extName, rest)
1507			return false
1508		}
1509		i.mu.Lock()
1510		i.statusErr = "unknown command: " + parts[0]
1511		i.mu.Unlock()
1512	}
1513	return false
1514}
1515
1516// openLogoutDialog shows the provider picker for `/logout` with no
1517// argument. Only providers the user is currently logged into are
1518// listed, plus an "all" entry when more than one is present. If
1519// nothing's logged in, writes a status line instead of opening an
1520// empty dialog.
1521func (i *Interactive) openLogoutDialog() {
1522	if i.cfg.AuthManager == nil {
1523		i.mu.Lock()
1524		i.statusErr = "no auth manager configured"
1525		i.mu.Unlock()
1526		i.invalidate()
1527		return
1528	}
1529	store := i.cfg.AuthManager.Store()
1530	if store == nil {
1531		i.mu.Lock()
1532		i.statusErr = "auth store is not available"
1533		i.mu.Unlock()
1534		i.invalidate()
1535		return
1536	}
1537	creds, err := store.Load()
1538	if err != nil {
1539		i.mu.Lock()
1540		i.statusErr = "read auth store: " + err.Error()
1541		i.mu.Unlock()
1542		i.invalidate()
1543		return
1544	}
1545
1546	var items []logoutItem
1547	for _, p := range []string{"anthropic", "openai"} {
1548		if creds.Has(p) {
1549			items = append(items, logoutItem{
1550				label:  p,
1551				target: p,
1552				method: creds.Method(p),
1553			})
1554		}
1555	}
1556	if len(items) == 0 {
1557		i.mu.Lock()
1558		i.statusOK = "no credentials stored; already logged out"
1559		i.statusErr = ""
1560		i.mu.Unlock()
1561		i.invalidate()
1562		return
1563	}
1564	if len(items) > 1 {
1565		items = append(items, logoutItem{label: "all", target: "all"})
1566	}
1567
1568	i.logoutDialog.Open(items)
1569	i.invalidate()
1570}
1571
1572// doLogout clears credentials for the given provider (or all providers)
1573// from auth.json. If the active agent was using those credentials, it
1574// is torn down so the user is forced through /login before their next
1575// prompt.
1576//
1577// target: "anthropic" | "openai" | "all"
1578func (i *Interactive) doLogout(target string) {
1579	if i.cfg.AuthManager == nil {
1580		i.mu.Lock()
1581		i.statusErr = "no auth manager configured"
1582		i.mu.Unlock()
1583		return
1584	}
1585	store := i.cfg.AuthManager.Store()
1586	if store == nil {
1587		i.mu.Lock()
1588		i.statusErr = "auth store is not available"
1589		i.mu.Unlock()
1590		return
1591	}
1592
1593	var providers []string
1594	switch target {
1595	case "", "all":
1596		providers = []string{"anthropic", "openai"}
1597	case "anthropic", "openai":
1598		providers = []string{target}
1599	default:
1600		i.mu.Lock()
1601		i.statusErr = "unknown provider: " + target + " (use anthropic, openai, or all)"
1602		i.mu.Unlock()
1603		return
1604	}
1605
1606	var errs []string
1607	clearedCurrent := false
1608	for _, p := range providers {
1609		if err := store.Clear(p); err != nil {
1610			errs = append(errs, p+": "+err.Error())
1611			continue
1612		}
1613		if p == i.cfg.Provider {
1614			clearedCurrent = true
1615		}
1616	}
1617
1618	i.mu.Lock()
1619	defer i.mu.Unlock()
1620	if len(errs) > 0 {
1621		i.statusErr = "logout errors: " + strings.Join(errs, "; ")
1622		return
1623	}
1624	i.statusErr = ""
1625	if clearedCurrent {
1626		// The running agent was using a credential we just wiped. Drop
1627		// it so prompts can't go out with the stale client, and hint at
1628		// /login.
1629		i.agent = nil
1630		i.statusOK = "logged out of " + strings.Join(providers, ", ") + ". type /login to sign back in."
1631	} else {
1632		i.statusOK = "logged out of " + strings.Join(providers, ", ")
1633	}
1634}
1635
1636func (i *Interactive) startAPIKeyFlow(provider string) {
1637	url, err := i.cfg.AuthManager.StartAPIKey(provider)
1638	if err != nil {
1639		i.dialog.ShowResult(false, err.Error())
1640		return
1641	}
1642	i.dialog.ShowWaiting(url)
1643}
1644
1645func (i *Interactive) startOAuthFlow(provider string) {
1646	url, err := i.cfg.AuthManager.StartOAuth(provider)
1647	if err != nil {
1648		i.dialog.ShowResult(false, err.Error())
1649		return
1650	}
1651	i.dialog.ShowWaiting(url)
1652}
1653
1654// applyModelSelection switches the active model (and provider, if the
1655// new model belongs to a different one). It rebuilds the underlying
1656// client when needed so the provider wire-protocol matches.
1657// cancelAndWaitForIdle cancels the active turn (if any) and blocks
1658// briefly until the turn goroutine has updated i.busy = false. Used
1659// before destructive slash commands so transcript-mutating work
1660// (/clear, /compact, /logout, /login completion, cross-provider
1661// /model swap) doesn't race with the still-running stream.
1662//
1663// The wait is bounded; if the turn doesn't release within the timeout
1664// we proceed anyway. Worst case is a brief overlap that the agent's
1665// own mutex protects against.
1666func (i *Interactive) cancelAndWaitForIdle() {
1667	i.mu.Lock()
1668	busy := i.busy
1669	cancel := i.cancelTurn
1670	i.mu.Unlock()
1671	if !busy {
1672		return
1673	}
1674	if cancel != nil {
1675		cancel()
1676	}
1677	deadline := time.Now().Add(2 * time.Second)
1678	for time.Now().Before(deadline) {
1679		i.mu.Lock()
1680		done := !i.busy
1681		i.mu.Unlock()
1682		if done {
1683			return
1684		}
1685		time.Sleep(10 * time.Millisecond)
1686	}
1687}
1688
1689// openBtwDialog opens the side-chat overlay with a frozen snapshot
1690// of the current main session. The optional argument is auto-
1691// submitted as the first question, so '/btw does X work?' fires the
1692// model call immediately instead of just opening an empty dialog.
1693func (i *Interactive) openBtwDialog(args []string) {
1694	if i.agent == nil {
1695		i.mu.Lock()
1696		i.statusErr = "not logged in. type /login first."
1697		i.mu.Unlock()
1698		return
1699	}
1700	seed := strings.TrimSpace(strings.Join(args, " "))
1701	i.btwDialog.Open(i.cfg.Theme, i.agent, i.agent.System, i.cfg.Model, seed)
1702	i.invalidate()
1703}
1704
1705// openSkillsDialog opens the skill inspector. The picker reflects
1706// whatever SkillSnapshot returns at call time, so edits to a
1707// SKILL.md made during a session show up on the next /skills.
1708func (i *Interactive) openSkillsDialog() {
1709	var list []*skills.Skill
1710	if i.cfg.SkillSnapshot != nil {
1711		list = i.cfg.SkillSnapshot()
1712	}
1713	i.skillsDialog.Open(list)
1714	i.invalidate()
1715}
1716
1717// openJumpDialog builds a /jump picker from the current transcript.
1718// If the user typed "/jump foo" with a filter and it matches exactly
1719// one turn, jump there directly without showing the dialog.
1720func (i *Interactive) openJumpDialog(args []string) {
1721	if i.view == nil || len(i.view.Messages) == 0 {
1722		i.mu.Lock()
1723		i.statusErr = "nothing to jump to \u2014 the session is empty"
1724		i.mu.Unlock()
1725		return
1726	}
1727	filter := strings.TrimSpace(strings.Join(args, " "))
1728	i.jumpDialog.Open(i.view.Messages, filter)
1729	// Shortcut: with a filter argument that matches exactly one turn,
1730	// jump immediately and skip the picker.
1731	if filter != "" {
1732		if tgts := i.jumpDialog.Targets(); len(tgts) == 1 {
1733			t := tgts[0]
1734			i.jumpDialog.Close()
1735			i.applyJumpSelection(t.MessageIdx, t.TurnNo)
1736		}
1737	}
1738}
1739
1740// applyJumpSelection scrolls the chat viewport so the user message at
1741// msgIdx is visible at (or near) the top of the chat area. Uses the
1742// anchor slice returned by view.BuildWithAnchors so the mapping from
1743// message index to row is exact, regardless of variable-height tool
1744// blocks above the target.
1745func (i *Interactive) applyJumpSelection(msgIdx, turnNo int) {
1746	cols := i.lastCols()
1747	chat, anchors := i.view.BuildWithAnchors(cols)
1748	var row int
1749	found := false
1750	for _, a := range anchors {
1751		if a.MessageIdx == msgIdx {
1752			row = a.Row
1753			found = true
1754			break
1755		}
1756	}
1757	if !found {
1758		i.mu.Lock()
1759		i.statusErr = "could not resolve jump target"
1760		i.mu.Unlock()
1761		return
1762	}
1763
1764	chatLen := len(chat)
1765	page := i.chatPage()
1766	if page < 1 {
1767		page = 1
1768	}
1769	// scrollOffset is measured from the bottom of the chat slice, so
1770	// to place `row` at the top of the viewport we want:
1771	//     chatLen - scrollOffset - page == row
1772	// Solve for scrollOffset and clamp to [0, chatLen-page].
1773	offset := chatLen - (row + page)
1774	if offset < 0 {
1775		offset = 0
1776	}
1777	maxOffset := chatLen - page
1778	if maxOffset < 0 {
1779		maxOffset = 0
1780	}
1781	if offset > maxOffset {
1782		offset = maxOffset
1783	}
1784
1785	i.mu.Lock()
1786	i.scrollOffset = offset
1787	i.parkedTurn = turnNo
1788	i.parkedTotal = totalTurnsLocked(i.view.Messages)
1789	i.statusOK = fmt.Sprintf("jumped to turn %d", turnNo)
1790	i.statusErr = ""
1791	i.mu.Unlock()
1792}
1793
1794// totalTurnsLocked counts user messages in the transcript. Caller is
1795// assumed to hold i.mu (the name is a mild reminder; this function
1796// itself doesn't touch shared state beyond the slice it's handed).
1797func totalTurnsLocked(msgs []provider.Message) int {
1798	n := 0
1799	for _, m := range msgs {
1800		if m.Role == provider.RoleUser {
1801			n++
1802		}
1803	}
1804	return n
1805}
1806
1807// applySessionSelection loads the given session via the cli-provided
1808// callback and parks the viewport on the last turn so the user lands
1809// looking at where the conversation left off (their last prompt at the
1810// top of the chat, the assistant's last reply right below). Older
1811// history is one scroll up; pgdn or end snaps to the current tail.
1812//
1813// Without this, scrollOffset stayed at 0 (pinned to the live tail),
1814// which on a long resumed session showed only the last few rows of
1815// the final assistant message — the user read that as "only one liner
1816// happened, the resume didn't work".
1817func (i *Interactive) applySessionSelection(path string) {
1818	if i.cfg.LoadSession == nil {
1819		i.mu.Lock()
1820		i.statusErr = "session loading is not wired in this build"
1821		i.mu.Unlock()
1822		return
1823	}
1824	if err := i.cfg.LoadSession(path); err != nil {
1825		i.mu.Lock()
1826		i.statusErr = err.Error()
1827		i.mu.Unlock()
1828		return
1829	}
1830
1831	i.mu.Lock()
1832	i.statusOK = "resumed session: " + path
1833	i.statusErr = ""
1834	i.parkedTurn = 0
1835	i.parkedTotal = 0
1836	i.view.InvalidateRenderCache()
1837	// Pull the freshly-loaded transcript into the view so the anchor
1838	// math below sees the post-resume messages, not the empty pre-load
1839	// state. redraw() does the same on its next pass; we just front-run
1840	// it here to compute the scroll target.
1841	if i.agent != nil {
1842		i.view.Messages = i.agent.Messages()
1843	}
1844	msgs := i.view.Messages
1845	i.mu.Unlock()
1846
1847	i.scrollToLastTurn(msgs)
1848}
1849
1850// scrollToLastTurn parks the viewport at the most recent user turn,
1851// or at the top if the transcript has no user messages. Used after
1852// resume so the user lands looking at where they left off.
1853func (i *Interactive) scrollToLastTurn(msgs []provider.Message) {
1854	if len(msgs) == 0 {
1855		i.mu.Lock()
1856		i.scrollOffset = 0
1857		i.mu.Unlock()
1858		return
1859	}
1860	// Find the last user message index.
1861	lastUser := -1
1862	turnNo, totalTurns := 0, 0
1863	for idx, m := range msgs {
1864		if m.Role == provider.RoleUser {
1865			totalTurns++
1866			lastUser = idx
1867		}
1868	}
1869	if lastUser < 0 {
1870		i.mu.Lock()
1871		i.scrollOffset = 0
1872		i.mu.Unlock()
1873		return
1874	}
1875	turnNo = totalTurns
1876
1877	cols := i.lastCols()
1878	chat, anchors := i.view.BuildWithAnchors(cols)
1879	var row int
1880	found := false
1881	for _, a := range anchors {
1882		if a.MessageIdx == lastUser {
1883			row = a.Row
1884			found = true
1885			break
1886		}
1887	}
1888	if !found {
1889		i.mu.Lock()
1890		i.scrollOffset = 0
1891		i.mu.Unlock()
1892		return
1893	}
1894
1895	chatLen := len(chat)
1896	page := i.chatPage()
1897	if page < 1 {
1898		page = 1
1899	}
1900	offset := chatLen - (row + page)
1901	if offset < 0 {
1902		offset = 0
1903	}
1904	maxOffset := chatLen - page
1905	if maxOffset < 0 {
1906		maxOffset = 0
1907	}
1908	if offset > maxOffset {
1909		offset = maxOffset
1910	}
1911
1912	i.mu.Lock()
1913	i.scrollOffset = offset
1914	// Mark the parked-turn footer so the user sees "viewing turn N of
1915	// M · pgdn to catch up" — same affordance as /jump. Tells them at
1916	// a glance that they're looking at history, not the live tail.
1917	if offset > 0 {
1918		i.parkedTurn = turnNo
1919		i.parkedTotal = totalTurns
1920	}
1921	i.mu.Unlock()
1922	i.invalidate()
1923}
1924
1925func (i *Interactive) applyModelSelection(prov, model string) {
1926	if model == "" {
1927		return
1928	}
1929	m, err := provider.FindModel(prov, model)
1930	if err != nil {
1931		i.mu.Lock()
1932		i.statusErr = err.Error()
1933		i.mu.Unlock()
1934		return
1935	}
1936	// Same provider? Just swap the model on the existing agent.
1937	if i.agent != nil && m.Provider == i.cfg.Provider {
1938		i.mu.Lock()
1939		i.cfg.Model = m.ID
1940		i.agent.Model = m.ID
1941		i.statusOK = "model: " + m.ID
1942		i.statusErr = ""
1943		i.mu.Unlock()
1944		if i.cfg.PersistModel != nil {
1945			i.cfg.PersistModel(i.cfg.Provider, m.ID)
1946		}
1947		return
1948	}
1949	// Different provider: rebuild agent (needs credentials for target provider).
1950	if i.cfg.BuildAgentFor == nil {
1951		i.mu.Lock()
1952		i.statusErr = "cannot switch provider: no builder configured"
1953		i.mu.Unlock()
1954		return
1955	}
1956	// Snapshot the current transcript and cumulative usage BEFORE we
1957	// build the replacement agent so we can hand them off. Without
1958	// this the user perceives the entire session as wiped on a
1959	// cross-provider /model swap.
1960	var carryMsgs []provider.Message
1961	var carryCost provider.Usage
1962	if i.agent != nil {
1963		carryMsgs = i.agent.Messages()
1964		carryCost = i.agent.Cost()
1965	}
1966
1967	ag, p, md, err := i.cfg.BuildAgentFor(m.Provider, m.ID)
1968	if err != nil {
1969		i.mu.Lock()
1970		i.statusErr = err.Error()
1971		i.mu.Unlock()
1972		return
1973	}
1974
1975	// Replay the transcript and seed the cost on the freshly-built
1976	// agent. Messages travel cleanly between providers because they
1977	// use the same provider.Message shape; tool-call ids are local
1978	// to a turn so cross-provider continuation never confuses the
1979	// new model (it just sees the assistant's reply, no orphan
1980	// tool_use blocks because /model swaps are gated to idle state).
1981	if len(carryMsgs) > 0 {
1982		ag.SetMessages(carryMsgs)
1983	}
1984	ag.SeedCost(carryCost)
1985
1986	i.mu.Lock()
1987	i.agent = ag
1988	i.cfg.Provider = p
1989	i.cfg.Model = md
1990	i.statusOK = "switched to " + p + " / " + md
1991	i.statusErr = ""
1992	// Render cache keys are width+content based, so the new agent's
1993	// identical messages will reuse the existing entries. Nothing
1994	// to invalidate.
1995	i.mu.Unlock()
1996	if i.cfg.PersistModel != nil {
1997		i.cfg.PersistModel(p, md)
1998	}
1999}
2000
2001func (i *Interactive) handleAuthEvent(ev auth.Event) {
2002	switch ev.Kind {
2003	case "started":
2004		i.dialog.ShowWaiting(ev.URL)
2005	case "browser_open":
2006		// no-op
2007	case "error":
2008		i.dialog.ShowResult(false, ev.Message)
2009	case "success":
2010		// Rebuild the agent with the fresh credential.
2011		ag, prov, model, err := i.cfg.BuildAgent()
2012		if err != nil {
2013			i.dialog.ShowResult(false, err.Error())
2014			return
2015		}
2016		i.mu.Lock()
2017		i.agent = ag
2018		i.cfg.Provider = prov
2019		i.cfg.Model = model
2020		i.statusErr = ""
2021		i.statusOK = "logged in to " + ev.Provider + " via " + ev.Method
2022		i.mu.Unlock()
2023		i.dialog.ShowResult(true, "")
2024	}
2025}
2026
2027// runCompact invokes core.Agent.Compact and reflects the progress in
2028// the tui. It runs in a goroutine so the ui stays responsive; esc/ctrl+c
2029// cancel via the same cancelTurn channel used for normal turns.
2030//
2031// When auto is true the spinner message is pinned to "condensing
2032// history" and the status bar surfaces "(auto)" next to the context
2033// percentage so it's obvious the system triggered this, not the user.
2034func (i *Interactive) runCompact(parent context.Context, auto bool) {
2035	if i.agent == nil {
2036		i.mu.Lock()
2037		i.statusErr = "not logged in. type /login first."
2038		i.mu.Unlock()
2039		return
2040	}
2041	ctx, cancel := context.WithCancel(parent)
2042	i.mu.Lock()
2043	i.busy = true
2044	if auto {
2045		i.spin.StartFixed("condensing history")
2046		i.autoCompacting = true
2047		i.statusOK = "condensing history… (esc to cancel)"
2048	} else {
2049		i.spin.Start()
2050		i.statusOK = "compacting..."
2051	}
2052	i.cancelTurn = cancel
2053	i.statusErr = ""
2054	i.streaming.Reset()
2055	i.streamOn = true
2056	i.scrollOffset = 0
2057	i.helpBlock = nil
2058	i.mu.Unlock()
2059	i.invalidate()
2060
2061	go func() {
2062		sink := func(delta string) {
2063			i.mu.Lock()
2064			i.streaming.WriteString(delta)
2065			i.mu.Unlock()
2066			i.invalidate()
2067		}
2068		summary, err := i.agent.Compact(ctx, 4, sink)
2069		i.mu.Lock()
2070		i.busy = false
2071		i.resetStreamingStateLocked()
2072		i.cancelTurn = nil
2073		i.autoCompacting = false
2074		switch {
2075		case err != nil && ctx.Err() != nil:
2076			i.statusErr = ""
2077			if auto {
2078				i.statusOK = "auto-condense cancelled"
2079			} else {
2080				i.statusOK = "compaction cancelled"
2081			}
2082		case err != nil:
2083			i.statusErr = "compaction failed: " + err.Error()
2084			i.statusOK = ""
2085		default:
2086			i.statusErr = ""
2087			i.statusOK = fmt.Sprintf("compacted transcript (%d chars of summary)", len(summary))
2088			i.lastCtxInput = 0 // reset; next turn will get a fresh measurement
2089			i.toolCalls = map[string]*tui.ToolCallView{}
2090			i.toolOrder = nil
2091			// Transcript was rewritten in place — purge the per-message
2092			// render cache so stale entries keyed on the old messages
2093			// don't linger.
2094			i.view.InvalidateRenderCache()
2095		}
2096		i.mu.Unlock()
2097		i.invalidate()
2098	}()
2099}
2100
2101func (i *Interactive) startTurn(parent context.Context, prompt string) {
2102	if i.agent == nil {
2103		return
2104	}
2105	ctx, cancel := context.WithCancel(parent)
2106	i.mu.Lock()
2107	i.busy = true
2108	i.spin.Start()
2109	i.cancelTurn = cancel
2110	i.statusErr = ""
2111	i.statusOK = ""
2112	i.streaming.Reset()
2113	i.streamOn = true
2114	i.toolCalls = map[string]*tui.ToolCallView{}
2115	i.toolOrder = nil
2116	i.scrollOffset = 0 // jump back to the bottom on new turn
2117	i.parkedTurn = 0   // starting a turn clears the /jump parked state
2118	i.parkedTotal = 0
2119	i.helpBlock = nil // hide the help block once the user asks something
2120	i.mu.Unlock()
2121	i.invalidate()
2122
2123	sink := func(ev core.AgentEvent) {
2124		i.handleEvent(ev)
2125		i.invalidate()
2126	}
2127
2128	go func() {
2129		err := i.agent.Prompt(ctx, prompt, nil, sink)
2130		i.mu.Lock()
2131		i.busy = false
2132		// Don't touch streamPending / streamFlushPending here — the
2133		// pacer may still be draining the final deltas and needs to
2134		// paint them even though Prompt has returned. It will reset
2135		// streamOn on its own once the buffer empties.
2136		if len(i.streamPending) == 0 {
2137			i.streamOn = false
2138		}
2139		i.cancelTurn = nil
2140		if err != nil && ctx.Err() == nil {
2141			i.statusErr = err.Error()
2142		}
2143		// Persist the assistant's reply (and every tool row before
2144		// it) to the session file while the turn memory is hot.
2145		// Without this, WriteNewTranscript only fires at zot exit,
2146		// meaning a crash or ungraceful kill drops the whole
2147		// conversation. FlushSession is idempotent (it advances the
2148		// baseline so subsequent flushes only write new rows).
2149		flush := i.cfg.FlushSession
2150		i.mu.Unlock()
2151		if flush != nil {
2152			flush()
2153		}
2154		i.mu.Lock()
2155		// Pop the next queued message, if any, and relaunch.
2156		var next string
2157		var hasNext bool
2158		if len(i.queued) > 0 && ctx.Err() == nil && err == nil {
2159			next, i.queued = i.queued[0], i.queued[1:]
2160			hasNext = true
2161		}
2162		// If the turn was cancelled or errored, drop the queue so the
2163		// user isn't bombarded with stale messages after an interrupt.
2164		if ctx.Err() != nil || err != nil {
2165			i.queued = nil
2166		}
2167		// Decide whether the next thing to do is an auto-compaction.
2168		// Only fires when the turn completed cleanly AND the queue is
2169		// empty (otherwise a queued message would race the condense).
2170		shouldAutoCompact := !hasNext && err == nil && ctx.Err() == nil && i.shouldAutoCompactLocked()
2171		i.mu.Unlock()
2172		i.invalidate()
2173		parent := i.runCtx
2174		if parent == nil {
2175			parent = context.Background()
2176		}
2177		switch {
2178		case hasNext:
2179			i.startTurn(parent, next)
2180		case shouldAutoCompact:
2181			i.runCompact(parent, true)
2182		}
2183	}()
2184}
2185
2186// autoCompactThreshold is the context-window fraction at which the
2187// agent will auto-compact after a turn ends. 0.85 leaves enough
2188// headroom for one more user prompt + response before we bump the
2189// hard limit.
2190const autoCompactThreshold = 0.85
2191
2192// shouldAutoCompactLocked reports whether the last turn pushed context
2193// usage past the auto-compact threshold. Must be called with i.mu
2194// held; it reads lastCtxInput and the current model's context window.
2195func (i *Interactive) shouldAutoCompactLocked() bool {
2196	if i.agent == nil {
2197		return false
2198	}
2199	if i.autoCompacting {
2200		return false
2201	}
2202	m, err := provider.FindModel(i.cfg.Provider, i.cfg.Model)
2203	if err != nil || m.ContextWindow <= 0 {
2204		return false
2205	}
2206	if i.lastCtxInput <= 0 {
2207		return false
2208	}
2209	return float64(i.lastCtxInput)/float64(m.ContextWindow) >= autoCompactThreshold
2210}
2211
2212func (i *Interactive) handleEvent(ev core.AgentEvent) {
2213	i.mu.Lock()
2214	defer i.mu.Unlock()
2215	switch e := ev.(type) {
2216	case core.EvAssistantStart:
2217		// Fires at the top of every oneTurn, including follow-up
2218		// turns after tool use. Without this, the streaming buffer
2219		// is still marked off from the previous assistant message
2220		// and the final summary text pops in all at once instead
2221		// of typewriter-streaming delta by delta.
2222		i.streaming.Reset()
2223		i.streamPending = i.streamPending[:0]
2224		i.streamFlushPending = false
2225		i.streamOn = true
2226		// Clear the live tool-call overlay. Any tools from the
2227		// previous round are now fully folded into the transcript
2228		// (assistant tool_use block + tool role message with the
2229		// result), so keeping them in the overlay would duplicate
2230		// them in the view — once inside the finalised transcript
2231		// and once below the streaming block, with the streaming
2232		// summary sandwiched in between. The next EvToolUseStart
2233		// will populate fresh entries for this turn's tools.
2234		i.toolCalls = map[string]*tui.ToolCallView{}
2235		i.toolOrder = nil
2236	case core.EvTextDelta:
2237		// Buffer into streamPending; the paintPace ticker drains
2238		// it into i.streaming a few runes at a time for a smooth
2239		// typewriter effect independent of upstream chunk size.
2240		i.streamPending = append(i.streamPending, []rune(e.Delta)...)
2241		i.streamOn = true
2242	case core.EvAssistantMessage:
2243		// OnAssistant + telegram mirroring always fire on message
2244		// arrival — they read the FINAL message content, which is
2245		// complete regardless of what's still in the pacer.
2246		i.assistantMessageSideEffects(e.Message)
2247		// If the pacer still has characters to drain, keep streamOn
2248		// true and mark flush pending; the paintPace ticker will
2249		// drain the remainder and reset streaming state when done.
2250		// Otherwise (rare: full-replay sessions, abort paths) clear
2251		// synchronously so a later render doesn't show stale text.
2252		if len(i.streamPending) > 0 {
2253			i.streamFlushPending = true
2254			return
2255		}
2256		i.resetStreamingStateLocked()
2257	case core.EvToolUseStart:
2258		// Live streaming: pre-create the view so the user sees the
2259		// tool call being composed in real time. Any subsequent
2260		// EvToolCall for the same ID updates the same struct (the
2261		// final parsed args + name are already known here).
2262		if _, exists := i.toolCalls[e.ID]; !exists {
2263			i.toolCalls[e.ID] = &tui.ToolCallView{
2264				ID:        e.ID,
2265				Name:      e.Name,
2266				Streaming: true,
2267			}
2268			i.toolOrder = append(i.toolOrder, e.ID)
2269		}
2270	case core.EvToolUseArgs:
2271		if tc, ok := i.toolCalls[e.ID]; ok {
2272			tc.RawJSONBuf += e.Delta
2273			// Refresh the live path as soon as it parses; used in
2274			// the header (▸ write /Users/pat/Desktop/demo.ts)
2275			// while the content is still streaming.
2276			if p, pok, _ := tui.ExtractPartialStringField(tc.RawJSONBuf, "path"); pok {
2277				tc.LivePath = p
2278			} else if p, pok, _ := tui.ExtractPartialStringField(tc.RawJSONBuf, "file_path"); pok {
2279				tc.LivePath = p
2280			}
2281		}
2282	case core.EvToolUseEnd:
2283		if tc, ok := i.toolCalls[e.ID]; ok {
2284			tc.Streaming = false
2285		}
2286	case core.EvToolCall:
2287		// If we already pre-created the view during streaming, just
2288		// refresh the final Args summary. Otherwise create a new one
2289		// (non-streaming providers or legacy paths).
2290		if tc, ok := i.toolCalls[e.ID]; ok {
2291			tc.Args = tui.ShortArgs(e.Name, e.Args)
2292			tc.Streaming = false
2293		} else {
2294			i.toolCalls[e.ID] = &tui.ToolCallView{
2295				ID:   e.ID,
2296				Name: e.Name,
2297				Args: tui.ShortArgs(e.Name, e.Args),
2298			}
2299			i.toolOrder = append(i.toolOrder, e.ID)
2300		}
2301	case core.EvToolResult:
2302		if tc, ok := i.toolCalls[e.ID]; ok {
2303			tc.Done = true
2304			tc.Error = e.Result.IsError
2305			var text strings.Builder
2306			for _, c := range e.Result.Content {
2307				if tb, ok := c.(provider.TextBlock); ok {
2308					if text.Len() > 0 {
2309						text.WriteString("\n")
2310					}
2311					text.WriteString(tb.Text)
2312				}
2313			}
2314			tc.Result = text.String()
2315		}
2316		if i.cfg.OnToolResult != nil {
2317			i.cfg.OnToolResult(e.ID, e.Result)
2318		}
2319	case core.EvUsage:
2320		i.cumUsage = e.Cumulative
2321		if e.Usage.InputTokens > 0 {
2322			i.lastCtxInput = e.Usage.InputTokens + e.Usage.CacheReadTokens + e.Usage.CacheWriteTokens
2323		}
2324	case core.EvTurnEnd:
2325		if e.Stop == provider.StopAborted {
2326			// Aborted turn: discard the partial streaming text (it
2327			// is not persisted in the transcript) and clear any
2328			// transient error. Also drop anything still buffered in
2329			// the pacer so nothing keeps drawing after the cancel.
2330			i.resetStreamingStateLocked()
2331			i.statusErr = ""
2332			i.statusOK = "cancelled"
2333			return
2334		}
2335		if e.Err != nil && !strings.Contains(e.Err.Error(), "context canceled") {
2336			i.statusErr = e.Err.Error()
2337		}
2338	}
2339}
2340
2341// Agent returns the current agent, if any. Used by cli.go to flush the
2342// final transcript to the session file.
2343func (i *Interactive) Agent() *core.Agent {
2344	i.mu.Lock()
2345	defer i.mu.Unlock()
2346	return i.agent
2347}
2348
2349// silence unused import in some build configs
2350var _ = fmt.Sprintf
2351
2352// runReloadExt triggers a live reload of every extension (discovered
2353// + explicit). Runs on a goroutine so the TUI stays responsive; the
2354// Manager.Reload takes a couple of hundred ms to shut down subprocs
2355// and respawn them. Shows a status line throughout.
2356func (i *Interactive) runReloadExt(ctx context.Context) {
2357	if i.cfg.Extensions == nil {
2358		i.mu.Lock()
2359		i.statusErr = "no extension manager in this build"
2360		i.mu.Unlock()
2361		i.invalidate()
2362		return
2363	}
2364	i.mu.Lock()
2365	i.statusOK = "reloading extensions…"
2366	i.statusErr = ""
2367	i.mu.Unlock()
2368	i.invalidate()
2369
2370	go func() {
2371		stats := i.cfg.Extensions.Reload(ctx, 2*time.Second)
2372		msg := fmt.Sprintf("reloaded: %d stopped, %d loaded (%d ready)", stats.Stopped, stats.Loaded, stats.Ready)
2373		if len(stats.Errors) > 0 {
2374			msg += fmt.Sprintf(", %d error(s)", len(stats.Errors))
2375		}
2376		i.mu.Lock()
2377		i.statusOK = msg
2378		i.statusErr = ""
2379		i.mu.Unlock()
2380		i.invalidate()
2381	}()
2382}
2383
2384// Confirm implements core.Confirmer. The agent goroutine calls
2385// this synchronously before every tool invocation when --no-yolo is
2386// active. We push the request onto the confirmDialog queue, trigger
2387// a redraw, and block the caller until the user answers.
2388//
2389// If the session is cancelled or the TUI exits mid-prompt, any
2390// pending request is refused via CancelAll so the agent doesn't
2391// deadlock.
2392func (i *Interactive) Confirm(toolName string, preview string) core.ConfirmDecision {
2393	resp := make(chan core.ConfirmDecision, 1)
2394	i.confirmDialog.Enqueue(&confirmRequest{
2395		toolName: toolName,
2396		preview:  preview,
2397		resp:     resp,
2398	})
2399	i.invalidate()
2400	return <-resp
2401}
2402
2403// runYoloOn disables --no-yolo for the rest of the session. Tool
2404// calls run without prompting after this; there's intentionally no
2405// way to re-enable gating mid-session, if the user wants that back
2406// they can exit and restart with --no-yolo.
2407func (i *Interactive) runYoloOn() {
2408	if i.cfg.ConfirmGate == nil {
2409		i.mu.Lock()
2410		i.statusOK = "yolo mode is already on (no --no-yolo in this session)"
2411		i.statusErr = ""
2412		i.mu.Unlock()
2413		i.invalidate()
2414		return
2415	}
2416	i.cfg.ConfirmGate.AllowAll()
2417	// Also auto-allow any currently pending confirmation so the
2418	// agent doesn't deadlock if /yolo is typed while a prompt is
2419	// open.
2420	i.confirmDialog.AllowAllPending()
2421	i.mu.Lock()
2422	i.statusOK = "yolo engaged: no more tool-call confirmations this session"
2423	i.statusErr = ""
2424	i.mu.Unlock()
2425	i.invalidate()
2426}
2427
2428// openTelegramDialog shows the picker for `/telegram` with no arg.
2429// Items depend on current state: disconnect + status when running,
2430// connect + status when stopped.
2431func (i *Interactive) openTelegramDialog() {
2432	items := i.telegramMenuItems()
2433	if len(items) == 0 {
2434		i.mu.Lock()
2435		i.statusErr = "telegram not configured. run `zot telegram-bot setup` first."
2436		i.mu.Unlock()
2437		i.invalidate()
2438		return
2439	}
2440	i.telegramDialog.Open(items)
2441	i.invalidate()
2442}
2443
2444// telegramMenuItems builds the dialog entries for the current
2445// bridge state. Returns empty when no bot.json exists so the
2446// caller can show a helpful status line instead of an empty menu.
2447func (i *Interactive) telegramMenuItems() []telegramItem {
2448	cfg, err := telegram.LoadConfig(i.cfg.ZotHome)
2449	if err != nil || cfg.BotToken == "" {
2450		return nil
2451	}
2452	var items []telegramItem
2453	if i.telegramBridge != nil && i.telegramBridge.Active() {
2454		items = append(items, telegramItem{label: "disconnect", action: "disconnect", hint: "stop mirroring"})
2455		st := i.telegramBridge.State()
2456		hint := "active"
2457		if st.Username != "" {
2458			hint += " as @" + st.Username
2459		}
2460		items = append(items, telegramItem{label: "status", action: "status", hint: hint})
2461	} else {
2462		label := "connect"
2463		hint := "start mirroring dms into this session"
2464		if cfg.AllowedUserID == 0 {
2465			hint = "awaiting pairing (send /start to the bot once connected)"
2466		}
2467		items = append(items, telegramItem{label: label, action: "connect", hint: hint})
2468		items = append(items, telegramItem{label: "status", action: "status", hint: "disconnected"})
2469	}
2470	return items
2471}
2472
2473// doTelegram dispatches one of the three explicit actions. Called
2474// from /telegram <action> or after the picker selects a row.
2475func (i *Interactive) doTelegram(action string) {
2476	switch action {
2477	case "connect":
2478		i.telegramConnect()
2479	case "disconnect":
2480		i.telegramDisconnect()
2481	case "status":
2482		i.telegramStatus()
2483	default:
2484		i.mu.Lock()
2485		i.statusErr = "unknown telegram action: " + action + " (use connect, disconnect, or status)"
2486		i.mu.Unlock()
2487		i.invalidate()
2488	}
2489}
2490
2491// telegramConnect starts the bridge. Refuses if it's already
2492// running or if the on-disk bot.json is missing a token.
2493func (i *Interactive) telegramConnect() {
2494	if i.telegramBridge != nil && i.telegramBridge.Active() {
2495		i.mu.Lock()
2496		i.statusOK = "telegram already connected"
2497		i.statusErr = ""
2498		i.mu.Unlock()
2499		i.invalidate()
2500		return
2501	}
2502	cfg, err := telegram.LoadConfig(i.cfg.ZotHome)
2503	if err != nil {
2504		i.mu.Lock()
2505		i.statusErr = "telegram: " + err.Error()
2506		i.mu.Unlock()
2507		i.invalidate()
2508		return
2509	}
2510	if cfg.BotToken == "" {
2511		i.mu.Lock()
2512		i.statusErr = "telegram: no bot token configured. run `zot telegram-bot setup` first."
2513		i.mu.Unlock()
2514		i.invalidate()
2515		return
2516	}
2517	// Refuse to start when a background daemon is already polling
2518	// the same bot. Two concurrent long-poll consumers race each
2519	// update and one always loses, so DMs get half-delivered. The
2520	// user can `zot telegram-bot stop` first, then /telegram connect.
2521	if pid, alive, _ := telegram.IsRunning(i.cfg.ZotHome); alive && pid > 0 {
2522		i.mu.Lock()
2523		i.statusErr = fmt.Sprintf("telegram: bot daemon already running (pid %d). stop it with `zot telegram-bot stop` first.", pid)
2524		i.mu.Unlock()
2525		i.invalidate()
2526		return
2527	}
2528	i.telegramBridge = &telegram.Bridge{
2529		Client: telegram.NewClient(cfg.BotToken),
2530		Config: cfg,
2531		Save: func(next telegram.Config) error {
2532			return telegram.SaveConfig(i.cfg.ZotHome, next)
2533		},
2534		Host: &telegramHost{iv: i},
2535	}
2536	if err := i.telegramBridge.Start(i.runCtx); err != nil {
2537		i.telegramBridge = nil
2538		i.mu.Lock()
2539		i.statusErr = "telegram connect failed: " + err.Error()
2540		i.mu.Unlock()
2541		i.invalidate()
2542		return
2543	}
2544	state := i.telegramBridge.State()
2545	label := "telegram connected"
2546	if state.Username != "" {
2547		label += " as @" + state.Username
2548	}
2549	if state.PairedID == 0 {
2550		label += " — send /start to the bot from your phone to claim it"
2551	}
2552	i.mu.Lock()
2553	i.statusOK = label
2554	i.statusErr = ""
2555	i.mu.Unlock()
2556	i.invalidate()
2557}
2558
2559// telegramDisconnect stops the bridge. No-op when already stopped.
2560func (i *Interactive) telegramDisconnect() {
2561	if i.telegramBridge == nil || !i.telegramBridge.Active() {
2562		i.mu.Lock()
2563		i.statusOK = "telegram already disconnected"
2564		i.statusErr = ""
2565		i.mu.Unlock()
2566		i.invalidate()
2567		return
2568	}
2569	i.telegramBridge.Stop()
2570	i.mu.Lock()
2571	i.statusOK = "telegram disconnected"
2572	i.statusErr = ""
2573	i.mu.Unlock()
2574	i.invalidate()
2575}
2576
2577// telegramStatus writes a one-liner describing the bridge state.
2578// Reports on both the in-tui bridge and the background daemon so
2579// the user isn't confused when the daemon owns the poll loop.
2580func (i *Interactive) telegramStatus() {
2581	var msg string
2582	if i.telegramBridge != nil && i.telegramBridge.Active() {
2583		s := i.telegramBridge.State()
2584		msg = "telegram: connected (tui bridge)"
2585		if s.Username != "" {
2586			msg += " as @" + s.Username
2587		}
2588		if s.PairedID != 0 {
2589			msg += fmt.Sprintf(" · paired with user %d", s.PairedID)
2590		} else {
2591			msg += " · awaiting pairing"
2592		}
2593	} else if pid, alive, _ := telegram.IsRunning(i.cfg.ZotHome); alive && pid > 0 {
2594		msg = fmt.Sprintf("telegram: background daemon running (pid %d) · /telegram connect won't work until you stop it", pid)
2595	} else {
2596		cfg, _ := telegram.LoadConfig(i.cfg.ZotHome)
2597		if cfg.BotToken == "" {
2598			msg = "telegram: not configured. run `zot telegram-bot setup` first."
2599		} else {
2600			msg = "telegram: disconnected"
2601			if cfg.BotUsername != "" {
2602				msg += " (@" + cfg.BotUsername + " ready to connect)"
2603			}
2604		}
2605	}
2606	i.mu.Lock()
2607	i.statusOK = msg
2608	i.statusErr = ""
2609	i.mu.Unlock()
2610	i.invalidate()
2611}
2612
2613// telegramHost adapts *Interactive to telegram.Host so the bridge
2614// can call back into the TUI without importing modes directly.
2615type telegramHost struct{ iv *Interactive }
2616
2617func (h *telegramHost) SubmitOrQueue(prompt string, images []provider.ImageBlock) {
2618	h.iv.SubmitOrQueue(prompt, images)
2619}
2620
2621func (h *telegramHost) CancelTurn() { h.iv.CancelTurn() }
2622
2623func (h *telegramHost) Notify(level, message string) {
2624	h.iv.mu.Lock()
2625	switch level {
2626	case "error", "warn":
2627		h.iv.statusErr = message
2628		h.iv.statusOK = ""
2629	default:
2630		h.iv.statusOK = message
2631		h.iv.statusErr = ""
2632	}
2633	h.iv.mu.Unlock()
2634	h.iv.invalidate()
2635}
2636
2637// openSessionOpsDialog shows the picker for `/session` with no arg.
2638// Always offers export, import, fork, tree; the handlers bail with
2639// a clear status message when the precondition isn't met (empty
2640// transcript on fork; no parent/siblings on tree).
2641func (i *Interactive) openSessionOpsDialog() {
2642	items := []sessionOpsItem{
2643		{label: "export", action: "export", hint: "write the current session to a .zotsession file"},
2644		{label: "import", action: "import", hint: "load a .zotsession file into this directory"},
2645		{label: "fork", action: "fork", hint: "branch from a past user message into a new session"},
2646		{label: "tree", action: "tree", hint: "switch between branches in this directory"},
2647	}
2648	i.sessionOpsDialog.Open(items)
2649	i.invalidate()
2650}
2651
2652// doSessionOp dispatches export, import, fork, or tree. arg is the
2653// optional positional argument from e.g. /session export <path>
2654// or /session import <path>; fork and tree ignore it.
2655func (i *Interactive) doSessionOp(action, arg string) {
2656	switch action {
2657	case "export":
2658		i.doSessionExport(arg)
2659	case "import":
2660		i.doSessionImport(arg)
2661	case "fork":
2662		i.doSessionFork()
2663	case "tree":
2664		i.doSessionTree()
2665	default:
2666		i.mu.Lock()
2667		i.statusErr = "unknown /session action: " + action + " (use export, import, fork, or tree)"
2668		i.mu.Unlock()
2669		i.invalidate()
2670	}
2671}
2672
2673// doSessionExport writes the live session file to destination path
2674// dst. When dst is empty we default to ~/Downloads (falling back to
2675// the user's home directory if it doesn't exist). The helper
2676// expands a leading `~` and creates any missing parent directories.
2677func (i *Interactive) doSessionExport(dst string) {
2678	if i.cfg.CurrentSessionPath == nil {
2679		i.mu.Lock()
2680		i.statusErr = "export: no session is active (running with --no-session?)"
2681		i.mu.Unlock()
2682		i.invalidate()
2683		return
2684	}
2685	src := i.cfg.CurrentSessionPath()
2686	if src == "" {
2687		i.mu.Lock()
2688		i.statusErr = "export: no session is active (running with --no-session?)"
2689		i.mu.Unlock()
2690		i.invalidate()
2691		return
2692	}
2693	// Persist any in-memory agent messages to the session file so
2694	// the export carries the full conversation. Without this, the
2695	// default lazy-flush-at-exit strategy leaves most of a running
2696	// session unwritten and the export ends up with only the meta.
2697	if i.cfg.FlushSession != nil {
2698		i.cfg.FlushSession()
2699	}
2700	dst = unquotePath(dst)
2701	if dst == "" {
2702		dst = defaultExportDir()
2703	} else {
2704		dst = expandTilde(dst)
2705	}
2706	out, err := core.ExportSession(src, dst)
2707	if err != nil {
2708		i.mu.Lock()
2709		i.statusErr = "export: " + err.Error()
2710		i.mu.Unlock()
2711		i.invalidate()
2712		return
2713	}
2714	i.mu.Lock()
2715	i.statusOK = "exported session to " + friendlyPath(out)
2716	i.statusErr = ""
2717	i.mu.Unlock()
2718	i.invalidate()
2719}
2720
2721// doSessionImport copies the .zotsession file at src into the
2722// running cwd's sessions directory and loads it as the active
2723// session, same as `/sessions` -> pick. When src is empty we ask
2724// the user to pass a path (no usable default here).
2725func (i *Interactive) doSessionImport(src string) {
2726	src = unquotePath(src)
2727	if src == "" {
2728		i.mu.Lock()
2729		i.statusErr = "import: pass a path — e.g. /session import ~/Downloads/work.zotsession"
2730		i.mu.Unlock()
2731		i.invalidate()
2732		return
2733	}
2734	src = expandTilde(src)
2735	if _, err := os.Stat(src); err != nil {
2736		i.mu.Lock()
2737		i.statusErr = "import: " + err.Error()
2738		i.mu.Unlock()
2739		i.invalidate()
2740		return
2741	}
2742	newPath, err := core.ImportSession(src, i.cfg.ZotHome, i.cfg.CWD, i.cfg.Version)
2743	if err != nil {
2744		i.mu.Lock()
2745		i.statusErr = "import: " + err.Error()
2746		i.mu.Unlock()
2747		i.invalidate()
2748		return
2749	}
2750	if i.cfg.LoadSession == nil {
2751		i.mu.Lock()
2752		i.statusOK = "imported session at " + friendlyPath(newPath) + " (run /sessions to resume it)"
2753		i.statusErr = ""
2754		i.mu.Unlock()
2755		i.invalidate()
2756		return
2757	}
2758	if err := i.cfg.LoadSession(newPath); err != nil {
2759		i.mu.Lock()
2760		i.statusErr = "import: load failed: " + err.Error()
2761		i.mu.Unlock()
2762		i.invalidate()
2763		return
2764	}
2765	i.mu.Lock()
2766	i.statusOK = "imported and switched to session " + friendlyPath(newPath)
2767	i.statusErr = ""
2768	i.mu.Unlock()
2769	i.invalidate()
2770}
2771
2772// defaultExportDir returns ~/Downloads when it exists, or ~ as a
2773// fallback, or /tmp on exotic machines with no home dir.
2774func defaultExportDir() string {
2775	home, err := os.UserHomeDir()
2776	if err != nil || home == "" {
2777		return os.TempDir()
2778	}
2779	downloads := filepath.Join(home, "Downloads")
2780	if fi, err := os.Stat(downloads); err == nil && fi.IsDir() {
2781		return downloads
2782	}
2783	return home
2784}
2785
2786// expandTilde turns a leading ~ into the user's home directory.
2787// Returns the input unchanged when there's no tilde or no home.
2788func expandTilde(p string) string {
2789	if p == "" || p[0] != '~' {
2790		return p
2791	}
2792	home, err := os.UserHomeDir()
2793	if err != nil || home == "" {
2794		return p
2795	}
2796	if len(p) == 1 {
2797		return home
2798	}
2799	if p[1] == '/' || p[1] == filepath.Separator {
2800		return filepath.Join(home, p[2:])
2801	}
2802	return p
2803}
2804
2805// unquotePath strips a matching pair of surrounding single or
2806// double quotes. Drag-drop paste in the tui auto-quotes dropped
2807// file paths so the shell-like `/session import 'foo bar.zs'`
2808// stays well-formed; when the TUI's own slash handler consumes
2809// the arg, we want the raw path back.
2810func unquotePath(p string) string {
2811	p = strings.TrimSpace(p)
2812	if len(p) >= 2 {
2813		first := p[0]
2814		last := p[len(p)-1]
2815		if (first == '\'' && last == '\'') || (first == '"' && last == '"') {
2816			p = p[1 : len(p)-1]
2817		}
2818	}
2819	return p
2820}
2821
2822// friendlyPath collapses the user's home directory to a leading ~
2823// so status messages read cleanly. Falls back to the raw path when
2824// the home dir is unknown.
2825func friendlyPath(p string) string {
2826	home, err := os.UserHomeDir()
2827	if err != nil || home == "" {
2828		return p
2829	}
2830	if strings.HasPrefix(p, home+string(filepath.Separator)) {
2831		return "~" + p[len(home):]
2832	}
2833	return p
2834}
2835
2836// doSessionFork opens the /jump turn picker in "fork mode". The
2837// next selection branches the current session at that user turn
2838// instead of scrolling the viewport to it.
2839func (i *Interactive) doSessionFork() {
2840	if i.cfg.CurrentSessionPath == nil || i.cfg.CurrentSessionPath() == "" {
2841		i.mu.Lock()
2842		i.statusErr = "fork: no session is active (running with --no-session?)"
2843		i.mu.Unlock()
2844		i.invalidate()
2845		return
2846	}
2847	msgs := []provider.Message{}
2848	if i.agent != nil {
2849		msgs = i.agent.Messages()
2850	}
2851	if len(msgs) == 0 {
2852		i.mu.Lock()
2853		i.statusErr = "fork: transcript is empty; nothing to fork from"
2854		i.mu.Unlock()
2855		i.invalidate()
2856		return
2857	}
2858	i.pendingFork = true
2859	i.jumpDialog.Open(msgs, "")
2860	i.invalidate()
2861}
2862
2863// doSessionTree shows the branch topology picker for this cwd.
2864// Pick an entry to switch into it (same semantics as /sessions
2865// picking a past session, but with the parent/child indentation).
2866func (i *Interactive) doSessionTree() {
2867	if i.cfg.ZotHome == "" || i.cfg.CWD == "" {
2868		i.mu.Lock()
2869		i.statusErr = "tree: session storage not configured"
2870		i.mu.Unlock()
2871		i.invalidate()
2872		return
2873	}
2874	// Flush the running agent's transcript first so its message
2875	// count + latest preview are accurate in the tree.
2876	if i.cfg.FlushSession != nil {
2877		i.cfg.FlushSession()
2878	}
2879	roots := core.BuildSessionTree(i.cfg.ZotHome, i.cfg.CWD)
2880	if len(roots) == 0 {
2881		i.mu.Lock()
2882		i.statusErr = "tree: no sessions in this directory yet"
2883		i.mu.Unlock()
2884		i.invalidate()
2885		return
2886	}
2887	current := ""
2888	if i.cfg.CurrentSessionPath != nil {
2889		current = i.cfg.CurrentSessionPath()
2890	}
2891	if !i.sessionTreeDialog.Open(roots, current) {
2892		i.mu.Lock()
2893		i.statusErr = "tree: no branches to show"
2894		i.mu.Unlock()
2895	}
2896	i.invalidate()
2897}
2898
2899// applySessionTreeSelection switches the running agent to the
2900// session file at path. Thin wrapper around LoadSession that also
2901// writes a status line.
2902func (i *Interactive) applySessionTreeSelection(path string) {
2903	if i.cfg.LoadSession == nil {
2904		i.mu.Lock()
2905		i.statusErr = "tree: session swap not available in this build"
2906		i.mu.Unlock()
2907		i.invalidate()
2908		return
2909	}
2910	if err := i.cfg.LoadSession(path); err != nil {
2911		i.mu.Lock()
2912		i.statusErr = "tree: load failed: " + err.Error()
2913		i.mu.Unlock()
2914		i.invalidate()
2915		return
2916	}
2917	i.mu.Lock()
2918	i.statusOK = "switched to branch " + friendlyPath(path)
2919	i.statusErr = ""
2920	i.mu.Unlock()
2921	i.invalidate()
2922}
2923
2924// applyForkSelection branches the current session at msgIdx+1 (so
2925// the selected user message and everything before it is included
2926// in the new branch), then switches the running agent to the new
2927// file. Called from the jump-dialog handler when pendingFork=true.
2928func (i *Interactive) applyForkSelection(msgIdx int) {
2929	i.pendingFork = false
2930	if i.cfg.CurrentSessionPath == nil {
2931		i.mu.Lock()
2932		i.statusErr = "fork: no session is active"
2933		i.mu.Unlock()
2934		i.invalidate()
2935		return
2936	}
2937	src := i.cfg.CurrentSessionPath()
2938	if src == "" {
2939		i.mu.Lock()
2940		i.statusErr = "fork: no session is active"
2941		i.mu.Unlock()
2942		i.invalidate()
2943		return
2944	}
2945	if i.cfg.FlushSession != nil {
2946		i.cfg.FlushSession()
2947	}
2948	// msgIdx is 0-indexed message position; copy msgIdx+1 rows so
2949	// the selected user message is included.
2950	upTo := msgIdx + 1
2951	newPath, err := core.BranchSession(src, i.cfg.ZotHome, i.cfg.CWD, i.cfg.Version, upTo)
2952	if err != nil {
2953		i.mu.Lock()
2954		i.statusErr = "fork: " + err.Error()
2955		i.mu.Unlock()
2956		i.invalidate()
2957		return
2958	}
2959	if i.cfg.LoadSession == nil {
2960		i.mu.Lock()
2961		i.statusOK = "forked at message " + formatInt(upTo) + " (run /sessions to resume)"
2962		i.statusErr = ""
2963		i.mu.Unlock()
2964		i.invalidate()
2965		return
2966	}
2967	if err := i.cfg.LoadSession(newPath); err != nil {
2968		i.mu.Lock()
2969		i.statusErr = "fork: switch failed: " + err.Error()
2970		i.mu.Unlock()
2971		i.invalidate()
2972		return
2973	}
2974	i.mu.Lock()
2975	i.statusOK = "forked and switched to new branch at " + friendlyPath(newPath)
2976	i.statusErr = ""
2977	i.mu.Unlock()
2978	i.invalidate()
2979}
2980
2981// formatInt is a tiny strconv.Itoa shim; keeps the handler above
2982// from needing a strconv import just for one call.
2983func formatInt(n int) string {
2984	return fmt.Sprintf("%d", n)
2985}
2986
2987// assistantText returns the concatenated text of every TextBlock in
2988// m. Used by the streaming-view dedupe guard to tell when a live
2989// streamed reply has already been promoted into the transcript.
2990func assistantText(m provider.Message) string {
2991	var sb strings.Builder
2992	for _, c := range m.Content {
2993		if tb, ok := c.(provider.TextBlock); ok {
2994			if sb.Len() > 0 {
2995				sb.WriteByte('\n')
2996			}
2997			sb.WriteString(tb.Text)
2998		}
2999	}
3000	return sb.String()
3001}
3002
3003// resetStreamingStateLocked clears every piece of streaming state
3004// in one shot. Used by abort paths (turn cancel, compact finish,
3005// queue drain) so the pacer doesn't keep draining stale runes from
3006// a prior turn. Must be called with i.mu held.
3007func (i *Interactive) resetStreamingStateLocked() {
3008	i.streaming.Reset()
3009	i.streamPending = i.streamPending[:0]
3010	i.streamFlushPending = false
3011	i.streamOn = false
3012}
3013
3014// assistantMessageSideEffects runs the non-visual hooks attached to
3015// EvAssistantMessage: the host-provided OnAssistant callback and the
3016// telegram-bridge mirror. Called with i.mu held.
3017//
3018// Factored out of handleEvent because the streaming pacer may defer
3019// visual reset until after the last buffered rune has painted, but
3020// the callbacks themselves must fire on message arrival so
3021// downstream observers (session persistence, telegram, cost panels)
3022// don't wait on a UI animation to catch up.
3023func (i *Interactive) assistantMessageSideEffects(m provider.Message) {
3024	if i.cfg.OnAssistant != nil {
3025		i.cfg.OnAssistant(m)
3026	}
3027	if i.telegramBridge != nil && i.telegramBridge.Active() {
3028		var sb strings.Builder
3029		for _, c := range m.Content {
3030			if tb, ok := c.(provider.TextBlock); ok {
3031				if sb.Len() > 0 {
3032					sb.WriteString("\n")
3033				}
3034				sb.WriteString(tb.Text)
3035			}
3036		}
3037		if text := sb.String(); strings.TrimSpace(text) != "" {
3038			go i.telegramBridge.OnAssistantText(text)
3039		}
3040	}
3041}
3042
3043// paintPaceRate is how many runes the streaming pacer releases per
3044// tick. With a 16ms tick, 6 runes/tick is ~375 runes/s — fast enough
3045// that a 500-rune summary finishes in ~1.3s, slow enough to look
3046// like a human typing. Empirically matches the feel of provider
3047// paths that already drip-stream natively.
3048const paintPaceRate = 6
3049
3050// paintPaceInterval is the tick interval for the streaming pacer.
3051// 16ms lines up with the redraw throttle so we never paint faster
3052// than the terminal can keep up.
3053const paintPaceInterval = 16 * time.Millisecond
3054
3055// runStreamPacer drains buffered deltas from streamPending into
3056// streaming a small batch per tick, invalidating after each move.
3057// It stops when the context cancels (tui shutdown).
3058//
3059// Why a pacer: providers differ wildly in how they chunk their
3060// text_delta events. The API-key path on Anthropic emits ~30 drips
3061// for a 400-token summary; the OAuth path can coalesce the same
3062// summary into 3 fat chunks, visually indistinguishable from "the
3063// whole reply just appeared". The pacer normalizes that so every
3064// path looks the same on screen.
3065func (i *Interactive) runStreamPacer(ctx context.Context) {
3066	t := time.NewTicker(paintPaceInterval)
3067	defer t.Stop()
3068	for {
3069		select {
3070		case <-ctx.Done():
3071			return
3072		case <-t.C:
3073			i.mu.Lock()
3074			if len(i.streamPending) == 0 {
3075				// EvAssistantMessage already fired but the pacer
3076				// was still draining a tick ago. Everything is now
3077				// painted; clear the streaming flags so the next
3078				// redraw shows the finalised transcript message
3079				// and hides the streaming overlay.
3080				if i.streamFlushPending {
3081					i.streamFlushPending = false
3082					i.streaming.Reset()
3083					i.streamOn = false
3084					i.mu.Unlock()
3085					i.invalidate()
3086					continue
3087				}
3088				i.mu.Unlock()
3089				continue
3090			}
3091			n := paintPaceRate
3092			if n > len(i.streamPending) {
3093				n = len(i.streamPending)
3094			}
3095			i.streaming.WriteString(string(i.streamPending[:n]))
3096			i.streamPending = i.streamPending[n:]
3097			i.mu.Unlock()
3098			i.invalidate()
3099		}
3100	}
3101}