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		// SubmitValue() expands any [paste #N +L lines] placeholders
1185		// back into the pasted bodies; Value() is what the user
1186		// sees on screen. History stores the visible text so the
1187		// up-arrow recall shows the placeholder, not a 500-line
1188		// replay.
1189		visible := strings.TrimRight(i.ed.Value(), "\n")
1190		text := strings.TrimRight(i.ed.SubmitValue(), "\n")
1191		if text == "" {
1192			return false
1193		}
1194		i.ed.PushHistory(visible)
1195		i.ed.Clear()
1196		i.suggest.Reset()
1197
1198		if looksLikeSlashCommand(text) {
1199			head := text
1200			rest := ""
1201			if idx := strings.IndexAny(text, " \t"); idx >= 0 {
1202				head = text[:idx]
1203				rest = strings.TrimSpace(text[idx:])
1204			}
1205			if !isKnownSlashCommand(text) {
1206				// Try extensions before giving up. Extensions register
1207				// commands by bare name (no leading slash); strip it here.
1208				extName := strings.TrimPrefix(head, "/")
1209				if i.cfg.Extensions != nil && i.cfg.Extensions.HasCommand(extName) {
1210					go i.invokeExtensionCommand(ctx, extName, rest)
1211					return false
1212				}
1213				i.mu.Lock()
1214				i.statusErr = "unknown command " + head + " — type /help to see the list"
1215				i.statusOK = ""
1216				i.mu.Unlock()
1217				return false
1218			}
1219			// Slash commands run regardless of busy state. Commands that
1220			// would mutate the transcript or replace the agent (/clear,
1221			// /compact, /logout, /login, /model) cancel the active turn
1222			// first and wait for the goroutine to wind down so they don't
1223			// race with a streaming response. Safe commands (/help,
1224			// /jump, /sessions, /jail, /unjail, /exit) run immediately
1225			// without disturbing the active turn.
1226			if slashCancelsTurn(head) {
1227				i.cancelAndWaitForIdle()
1228			}
1229			return i.runSlash(ctx, text)
1230		}
1231
1232		if i.agent == nil {
1233			i.mu.Lock()
1234			i.statusErr = "not logged in. type /login first."
1235			i.mu.Unlock()
1236			return false
1237		}
1238		// Mirror the user's typed prompt into the paired Telegram
1239		// chat (when the bridge is active) so the Telegram thread
1240		// stays a complete record of the session, not just the half
1241		// that originated on the phone. On a goroutine so the
1242		// network write doesn't delay the local turn.
1243		if i.telegramBridge != nil && i.telegramBridge.Active() {
1244			go i.telegramBridge.OnUserTyped(text)
1245		}
1246		// If a turn is already in flight, queue this prompt instead of
1247		// starting a second one. The drain loop at the end of startTurn
1248		// will pick it up when the current turn finishes.
1249		i.mu.Lock()
1250		if i.busy {
1251			i.queued = append(i.queued, text)
1252			i.mu.Unlock()
1253			i.invalidate()
1254			return false
1255		}
1256		i.mu.Unlock()
1257		i.startTurn(ctx, text)
1258	}
1259	return false
1260}
1261
1262// invokeExtensionCommand fires an extension-registered slash command
1263// in a background goroutine, awaits the response, and applies the
1264// requested action (prompt / insert / display / noop). Errors and
1265// timeouts surface as a status_err line.
1266func (i *Interactive) invokeExtensionCommand(ctx context.Context, name, args string) {
1267	resp, err := i.cfg.Extensions.Invoke(ctx, name, args, 30*time.Second)
1268	if err != nil {
1269		i.mu.Lock()
1270		i.statusErr = "extension /" + name + ": " + err.Error()
1271		i.statusOK = ""
1272		i.mu.Unlock()
1273		i.invalidate()
1274		return
1275	}
1276	if resp.Error != "" {
1277		i.mu.Lock()
1278		i.statusErr = "extension /" + name + ": " + resp.Error
1279		i.statusOK = ""
1280		i.mu.Unlock()
1281		i.invalidate()
1282		return
1283	}
1284	switch resp.Action {
1285	case "prompt":
1286		if strings.TrimSpace(resp.Prompt) == "" {
1287			return
1288		}
1289		i.startTurn(i.runCtx, resp.Prompt)
1290	case "insert":
1291		i.ed.Insert(resp.Insert)
1292		i.invalidate()
1293	case "display":
1294		i.appendExtensionNote(name, resp.Display, "info")
1295	case "noop", "":
1296		// nothing
1297	default:
1298		i.mu.Lock()
1299		i.statusErr = "extension /" + name + ": unknown action " + resp.Action
1300		i.mu.Unlock()
1301		i.invalidate()
1302	}
1303}
1304
1305// appendExtensionNote renders an extension-originated note in the
1306// chat. Levels: "info" (muted), "warn" (warning), "error" (error),
1307// "success" (tool/ok green).
1308func (i *Interactive) appendExtensionNote(extName, msg, level string) {
1309	if msg == "" {
1310		return
1311	}
1312	i.mu.Lock()
1313	defer i.mu.Unlock()
1314	color := i.cfg.Theme.Muted
1315	switch level {
1316	case "warn":
1317		color = i.cfg.Theme.Warning
1318	case "error":
1319		color = i.cfg.Theme.Error
1320	case "success":
1321		color = i.cfg.Theme.Tool
1322	}
1323	prefix := i.cfg.Theme.FG256(i.cfg.Theme.Accent, "["+extName+"] ")
1324	for _, line := range strings.Split(msg, "\n") {
1325		i.statusOK = "" // clear any stale ok
1326		i.statusErr = ""
1327		i.extNotes = append(i.extNotes, prefix+i.cfg.Theme.FG256(color, line))
1328	}
1329}
1330
1331// HostHooks implementation for the extension manager. The manager
1332// holds an interface, not a concrete *Interactive, so these methods
1333// are the only thing the manager sees.
1334
1335// Notify is the manager's NotifyFromExt entry point.
1336func (i *Interactive) Notify(extName, level, message string) {
1337	i.appendExtensionNote(extName, message, level)
1338	i.invalidate()
1339}
1340
1341// Submit feeds text through the agent loop as if the user had typed it.
1342func (i *Interactive) Submit(text string) {
1343	i.startTurn(i.runCtx, text)
1344}
1345
1346// SubmitOrQueue runs text immediately if the agent is idle, or
1347// appends it to the pending queue if a turn is already in flight.
1348// Used by the telegram bridge (and by the editor submit path) so
1349// both input sources share the same "queue behind an active turn"
1350// semantics. Images are ignored for now — only the text prompt is
1351// forwarded — because the queued-prompt path is text-only; a
1352// follow-up can expand the queue entry to carry images.
1353func (i *Interactive) SubmitOrQueue(text string, images []provider.ImageBlock) {
1354	_ = images // reserved for future queued-with-images support
1355	i.mu.Lock()
1356	if i.agent == nil {
1357		i.statusErr = "not logged in. type /login first."
1358		i.mu.Unlock()
1359		i.invalidate()
1360		return
1361	}
1362	if i.busy {
1363		i.queued = append(i.queued, text)
1364		i.mu.Unlock()
1365		i.invalidate()
1366		return
1367	}
1368	i.mu.Unlock()
1369	i.startTurn(i.runCtx, text)
1370}
1371
1372// CancelTurn aborts the active turn if one is running. Used by the
1373// telegram bridge when the paired user sends /stop.
1374func (i *Interactive) CancelTurn() {
1375	i.mu.Lock()
1376	cancel := i.cancelTurn
1377	i.mu.Unlock()
1378	if cancel != nil {
1379		cancel()
1380	}
1381}
1382
1383// Insert places text at the cursor in the editor.
1384func (i *Interactive) Insert(text string) {
1385	i.ed.Insert(text)
1386	i.invalidate()
1387}
1388
1389// Display appends a styled note from extName to the chat without a
1390// model call.
1391func (i *Interactive) Display(extName, text string) {
1392	i.appendExtensionNote(extName, text, "info")
1393	i.invalidate()
1394}
1395
1396func (i *Interactive) runSlash(ctx context.Context, cmd string) (done bool) {
1397	parts := strings.Fields(cmd)
1398	switch parts[0] {
1399	case "/exit":
1400		return true
1401	case "/clear":
1402		if i.agent != nil {
1403			i.agent.SetMessages(nil)
1404		}
1405		i.mu.Lock()
1406		i.toolCalls = map[string]*tui.ToolCallView{}
1407		i.toolOrder = nil
1408		i.statusErr = ""
1409		i.statusOK = ""
1410		i.helpBlock = nil
1411		i.parkedTurn = 0
1412		i.parkedTotal = 0
1413		i.scrollOffset = 0
1414		i.extNotes = nil
1415		i.view.InvalidateRenderCache()
1416		i.mu.Unlock()
1417	case "/help":
1418		i.mu.Lock()
1419		i.helpBlock = renderHelpBlock(i.cfg.Theme, i.lastCols())
1420		i.statusErr = ""
1421		i.statusOK = ""
1422		// Pin the viewport to the newest content so the help block,
1423		// which we just appended to the end of the transcript, is
1424		// what the user actually sees.
1425		i.scrollOffset = 0
1426		i.mu.Unlock()
1427	case "/login":
1428		i.dialog.Open()
1429	case "/logout":
1430		if len(parts) >= 2 {
1431			// Explicit target: /logout anthropic | openai | all
1432			i.doLogout(parts[1])
1433			break
1434		}
1435		// No arg: open the picker over whichever providers are
1436		// currently logged in. If nothing's logged in, bail with a
1437		// status line.
1438		i.openLogoutDialog()
1439	case "/model":
1440		if len(parts) >= 2 {
1441			i.applyModelSelection("", parts[1])
1442		} else {
1443			i.modelDialog.Open(i.cfg.Model)
1444		}
1445	case "/sessions":
1446		i.sessionDialog.Open(i.cfg.ZotHome, i.cfg.CWD)
1447	case "/jump":
1448		i.openJumpDialog(parts[1:])
1449	case "/btw":
1450		i.openBtwDialog(parts[1:])
1451	case "/skills":
1452		i.openSkillsDialog()
1453	case "/compact":
1454		i.runCompact(ctx, false)
1455	case "/jail":
1456		if i.cfg.Sandbox == nil {
1457			i.mu.Lock()
1458			i.statusErr = "sandbox not available in this build"
1459			i.mu.Unlock()
1460			break
1461		}
1462		i.cfg.Sandbox.Lock()
1463		i.mu.Lock()
1464		i.statusOK = "jailed to " + i.cfg.CWD + " (tools cannot touch paths outside this directory)"
1465		i.statusErr = ""
1466		i.mu.Unlock()
1467	case "/unjail":
1468		if i.cfg.Sandbox == nil {
1469			i.mu.Lock()
1470			i.statusErr = "sandbox not available in this build"
1471			i.mu.Unlock()
1472			break
1473		}
1474		i.cfg.Sandbox.Unlock()
1475		i.mu.Lock()
1476		i.statusOK = "unjailed"
1477		i.statusErr = ""
1478		i.mu.Unlock()
1479	case "/reload-ext":
1480		i.runReloadExt(ctx)
1481	case "/yolo":
1482		i.runYoloOn()
1483	case "/telegram", "/tg":
1484		if len(parts) >= 2 {
1485			i.doTelegram(parts[1])
1486			break
1487		}
1488		i.openTelegramDialog()
1489	case "/session":
1490		if len(parts) >= 2 {
1491			action := parts[1]
1492			arg := ""
1493			if len(parts) >= 3 {
1494				arg = strings.Join(parts[2:], " ")
1495			}
1496			i.doSessionOp(action, arg)
1497			break
1498		}
1499		i.openSessionOpsDialog()
1500	default:
1501		// Last-resort fallback: try the extension manager. Built-in
1502		// cases above always win; this branch only fires for slash
1503		// commands the extension manager registered. Same routing as
1504		// the editor's submit-handler dispatch path so the autocomplete
1505		// "enter on highlighted suggestion" flow also works.
1506		extName := strings.TrimPrefix(parts[0], "/")
1507		if i.cfg.Extensions != nil && i.cfg.Extensions.HasCommand(extName) {
1508			rest := ""
1509			if len(parts) > 1 {
1510				rest = strings.Join(parts[1:], " ")
1511			}
1512			go i.invokeExtensionCommand(ctx, extName, rest)
1513			return false
1514		}
1515		i.mu.Lock()
1516		i.statusErr = "unknown command: " + parts[0]
1517		i.mu.Unlock()
1518	}
1519	return false
1520}
1521
1522// openLogoutDialog shows the provider picker for `/logout` with no
1523// argument. Only providers the user is currently logged into are
1524// listed, plus an "all" entry when more than one is present. If
1525// nothing's logged in, writes a status line instead of opening an
1526// empty dialog.
1527func (i *Interactive) openLogoutDialog() {
1528	if i.cfg.AuthManager == nil {
1529		i.mu.Lock()
1530		i.statusErr = "no auth manager configured"
1531		i.mu.Unlock()
1532		i.invalidate()
1533		return
1534	}
1535	store := i.cfg.AuthManager.Store()
1536	if store == nil {
1537		i.mu.Lock()
1538		i.statusErr = "auth store is not available"
1539		i.mu.Unlock()
1540		i.invalidate()
1541		return
1542	}
1543	creds, err := store.Load()
1544	if err != nil {
1545		i.mu.Lock()
1546		i.statusErr = "read auth store: " + err.Error()
1547		i.mu.Unlock()
1548		i.invalidate()
1549		return
1550	}
1551
1552	var items []logoutItem
1553	for _, p := range []string{"anthropic", "openai"} {
1554		if creds.Has(p) {
1555			items = append(items, logoutItem{
1556				label:  p,
1557				target: p,
1558				method: creds.Method(p),
1559			})
1560		}
1561	}
1562	if len(items) == 0 {
1563		i.mu.Lock()
1564		i.statusOK = "no credentials stored; already logged out"
1565		i.statusErr = ""
1566		i.mu.Unlock()
1567		i.invalidate()
1568		return
1569	}
1570	if len(items) > 1 {
1571		items = append(items, logoutItem{label: "all", target: "all"})
1572	}
1573
1574	i.logoutDialog.Open(items)
1575	i.invalidate()
1576}
1577
1578// doLogout clears credentials for the given provider (or all providers)
1579// from auth.json. If the active agent was using those credentials, it
1580// is torn down so the user is forced through /login before their next
1581// prompt.
1582//
1583// target: "anthropic" | "openai" | "all"
1584func (i *Interactive) doLogout(target string) {
1585	if i.cfg.AuthManager == nil {
1586		i.mu.Lock()
1587		i.statusErr = "no auth manager configured"
1588		i.mu.Unlock()
1589		return
1590	}
1591	store := i.cfg.AuthManager.Store()
1592	if store == nil {
1593		i.mu.Lock()
1594		i.statusErr = "auth store is not available"
1595		i.mu.Unlock()
1596		return
1597	}
1598
1599	var providers []string
1600	switch target {
1601	case "", "all":
1602		providers = []string{"anthropic", "openai"}
1603	case "anthropic", "openai":
1604		providers = []string{target}
1605	default:
1606		i.mu.Lock()
1607		i.statusErr = "unknown provider: " + target + " (use anthropic, openai, or all)"
1608		i.mu.Unlock()
1609		return
1610	}
1611
1612	var errs []string
1613	clearedCurrent := false
1614	for _, p := range providers {
1615		if err := store.Clear(p); err != nil {
1616			errs = append(errs, p+": "+err.Error())
1617			continue
1618		}
1619		if p == i.cfg.Provider {
1620			clearedCurrent = true
1621		}
1622	}
1623
1624	i.mu.Lock()
1625	defer i.mu.Unlock()
1626	if len(errs) > 0 {
1627		i.statusErr = "logout errors: " + strings.Join(errs, "; ")
1628		return
1629	}
1630	i.statusErr = ""
1631	if clearedCurrent {
1632		// The running agent was using a credential we just wiped. Drop
1633		// it so prompts can't go out with the stale client, and hint at
1634		// /login.
1635		i.agent = nil
1636		i.statusOK = "logged out of " + strings.Join(providers, ", ") + ". type /login to sign back in."
1637	} else {
1638		i.statusOK = "logged out of " + strings.Join(providers, ", ")
1639	}
1640}
1641
1642func (i *Interactive) startAPIKeyFlow(provider string) {
1643	url, err := i.cfg.AuthManager.StartAPIKey(provider)
1644	if err != nil {
1645		i.dialog.ShowResult(false, err.Error())
1646		return
1647	}
1648	i.dialog.ShowWaiting(url)
1649}
1650
1651func (i *Interactive) startOAuthFlow(provider string) {
1652	url, err := i.cfg.AuthManager.StartOAuth(provider)
1653	if err != nil {
1654		i.dialog.ShowResult(false, err.Error())
1655		return
1656	}
1657	i.dialog.ShowWaiting(url)
1658}
1659
1660// applyModelSelection switches the active model (and provider, if the
1661// new model belongs to a different one). It rebuilds the underlying
1662// client when needed so the provider wire-protocol matches.
1663// cancelAndWaitForIdle cancels the active turn (if any) and blocks
1664// briefly until the turn goroutine has updated i.busy = false. Used
1665// before destructive slash commands so transcript-mutating work
1666// (/clear, /compact, /logout, /login completion, cross-provider
1667// /model swap) doesn't race with the still-running stream.
1668//
1669// The wait is bounded; if the turn doesn't release within the timeout
1670// we proceed anyway. Worst case is a brief overlap that the agent's
1671// own mutex protects against.
1672func (i *Interactive) cancelAndWaitForIdle() {
1673	i.mu.Lock()
1674	busy := i.busy
1675	cancel := i.cancelTurn
1676	i.mu.Unlock()
1677	if !busy {
1678		return
1679	}
1680	if cancel != nil {
1681		cancel()
1682	}
1683	deadline := time.Now().Add(2 * time.Second)
1684	for time.Now().Before(deadline) {
1685		i.mu.Lock()
1686		done := !i.busy
1687		i.mu.Unlock()
1688		if done {
1689			return
1690		}
1691		time.Sleep(10 * time.Millisecond)
1692	}
1693}
1694
1695// openBtwDialog opens the side-chat overlay with a frozen snapshot
1696// of the current main session. The optional argument is auto-
1697// submitted as the first question, so '/btw does X work?' fires the
1698// model call immediately instead of just opening an empty dialog.
1699func (i *Interactive) openBtwDialog(args []string) {
1700	if i.agent == nil {
1701		i.mu.Lock()
1702		i.statusErr = "not logged in. type /login first."
1703		i.mu.Unlock()
1704		return
1705	}
1706	seed := strings.TrimSpace(strings.Join(args, " "))
1707	i.btwDialog.Open(i.cfg.Theme, i.agent, i.agent.System, i.cfg.Model, seed)
1708	i.invalidate()
1709}
1710
1711// openSkillsDialog opens the skill inspector. The picker reflects
1712// whatever SkillSnapshot returns at call time, so edits to a
1713// SKILL.md made during a session show up on the next /skills.
1714func (i *Interactive) openSkillsDialog() {
1715	var list []*skills.Skill
1716	if i.cfg.SkillSnapshot != nil {
1717		list = i.cfg.SkillSnapshot()
1718	}
1719	i.skillsDialog.Open(list)
1720	i.invalidate()
1721}
1722
1723// openJumpDialog builds a /jump picker from the current transcript.
1724// If the user typed "/jump foo" with a filter and it matches exactly
1725// one turn, jump there directly without showing the dialog.
1726func (i *Interactive) openJumpDialog(args []string) {
1727	if i.view == nil || len(i.view.Messages) == 0 {
1728		i.mu.Lock()
1729		i.statusErr = "nothing to jump to \u2014 the session is empty"
1730		i.mu.Unlock()
1731		return
1732	}
1733	filter := strings.TrimSpace(strings.Join(args, " "))
1734	i.jumpDialog.Open(i.view.Messages, filter)
1735	// Shortcut: with a filter argument that matches exactly one turn,
1736	// jump immediately and skip the picker.
1737	if filter != "" {
1738		if tgts := i.jumpDialog.Targets(); len(tgts) == 1 {
1739			t := tgts[0]
1740			i.jumpDialog.Close()
1741			i.applyJumpSelection(t.MessageIdx, t.TurnNo)
1742		}
1743	}
1744}
1745
1746// applyJumpSelection scrolls the chat viewport so the user message at
1747// msgIdx is visible at (or near) the top of the chat area. Uses the
1748// anchor slice returned by view.BuildWithAnchors so the mapping from
1749// message index to row is exact, regardless of variable-height tool
1750// blocks above the target.
1751func (i *Interactive) applyJumpSelection(msgIdx, turnNo int) {
1752	cols := i.lastCols()
1753	chat, anchors := i.view.BuildWithAnchors(cols)
1754	var row int
1755	found := false
1756	for _, a := range anchors {
1757		if a.MessageIdx == msgIdx {
1758			row = a.Row
1759			found = true
1760			break
1761		}
1762	}
1763	if !found {
1764		i.mu.Lock()
1765		i.statusErr = "could not resolve jump target"
1766		i.mu.Unlock()
1767		return
1768	}
1769
1770	chatLen := len(chat)
1771	page := i.chatPage()
1772	if page < 1 {
1773		page = 1
1774	}
1775	// scrollOffset is measured from the bottom of the chat slice, so
1776	// to place `row` at the top of the viewport we want:
1777	//     chatLen - scrollOffset - page == row
1778	// Solve for scrollOffset and clamp to [0, chatLen-page].
1779	offset := chatLen - (row + page)
1780	if offset < 0 {
1781		offset = 0
1782	}
1783	maxOffset := chatLen - page
1784	if maxOffset < 0 {
1785		maxOffset = 0
1786	}
1787	if offset > maxOffset {
1788		offset = maxOffset
1789	}
1790
1791	i.mu.Lock()
1792	i.scrollOffset = offset
1793	i.parkedTurn = turnNo
1794	i.parkedTotal = totalTurnsLocked(i.view.Messages)
1795	i.statusOK = fmt.Sprintf("jumped to turn %d", turnNo)
1796	i.statusErr = ""
1797	i.mu.Unlock()
1798}
1799
1800// totalTurnsLocked counts user messages in the transcript. Caller is
1801// assumed to hold i.mu (the name is a mild reminder; this function
1802// itself doesn't touch shared state beyond the slice it's handed).
1803func totalTurnsLocked(msgs []provider.Message) int {
1804	n := 0
1805	for _, m := range msgs {
1806		if m.Role == provider.RoleUser {
1807			n++
1808		}
1809	}
1810	return n
1811}
1812
1813// applySessionSelection loads the given session via the cli-provided
1814// callback and parks the viewport on the last turn so the user lands
1815// looking at where the conversation left off (their last prompt at the
1816// top of the chat, the assistant's last reply right below). Older
1817// history is one scroll up; pgdn or end snaps to the current tail.
1818//
1819// Without this, scrollOffset stayed at 0 (pinned to the live tail),
1820// which on a long resumed session showed only the last few rows of
1821// the final assistant message — the user read that as "only one liner
1822// happened, the resume didn't work".
1823func (i *Interactive) applySessionSelection(path string) {
1824	if i.cfg.LoadSession == nil {
1825		i.mu.Lock()
1826		i.statusErr = "session loading is not wired in this build"
1827		i.mu.Unlock()
1828		return
1829	}
1830	if err := i.cfg.LoadSession(path); err != nil {
1831		i.mu.Lock()
1832		i.statusErr = err.Error()
1833		i.mu.Unlock()
1834		return
1835	}
1836
1837	i.mu.Lock()
1838	i.statusOK = "resumed session: " + path
1839	i.statusErr = ""
1840	i.parkedTurn = 0
1841	i.parkedTotal = 0
1842	i.view.InvalidateRenderCache()
1843	// Pull the freshly-loaded transcript into the view so the anchor
1844	// math below sees the post-resume messages, not the empty pre-load
1845	// state. redraw() does the same on its next pass; we just front-run
1846	// it here to compute the scroll target.
1847	if i.agent != nil {
1848		i.view.Messages = i.agent.Messages()
1849	}
1850	msgs := i.view.Messages
1851	i.mu.Unlock()
1852
1853	i.scrollToLastTurn(msgs)
1854}
1855
1856// scrollToLastTurn parks the viewport at the most recent user turn,
1857// or at the top if the transcript has no user messages. Used after
1858// resume so the user lands looking at where they left off.
1859func (i *Interactive) scrollToLastTurn(msgs []provider.Message) {
1860	if len(msgs) == 0 {
1861		i.mu.Lock()
1862		i.scrollOffset = 0
1863		i.mu.Unlock()
1864		return
1865	}
1866	// Find the last user message index.
1867	lastUser := -1
1868	turnNo, totalTurns := 0, 0
1869	for idx, m := range msgs {
1870		if m.Role == provider.RoleUser {
1871			totalTurns++
1872			lastUser = idx
1873		}
1874	}
1875	if lastUser < 0 {
1876		i.mu.Lock()
1877		i.scrollOffset = 0
1878		i.mu.Unlock()
1879		return
1880	}
1881	turnNo = totalTurns
1882
1883	cols := i.lastCols()
1884	chat, anchors := i.view.BuildWithAnchors(cols)
1885	var row int
1886	found := false
1887	for _, a := range anchors {
1888		if a.MessageIdx == lastUser {
1889			row = a.Row
1890			found = true
1891			break
1892		}
1893	}
1894	if !found {
1895		i.mu.Lock()
1896		i.scrollOffset = 0
1897		i.mu.Unlock()
1898		return
1899	}
1900
1901	chatLen := len(chat)
1902	page := i.chatPage()
1903	if page < 1 {
1904		page = 1
1905	}
1906	offset := chatLen - (row + page)
1907	if offset < 0 {
1908		offset = 0
1909	}
1910	maxOffset := chatLen - page
1911	if maxOffset < 0 {
1912		maxOffset = 0
1913	}
1914	if offset > maxOffset {
1915		offset = maxOffset
1916	}
1917
1918	i.mu.Lock()
1919	i.scrollOffset = offset
1920	// Mark the parked-turn footer so the user sees "viewing turn N of
1921	// M · pgdn to catch up" — same affordance as /jump. Tells them at
1922	// a glance that they're looking at history, not the live tail.
1923	if offset > 0 {
1924		i.parkedTurn = turnNo
1925		i.parkedTotal = totalTurns
1926	}
1927	i.mu.Unlock()
1928	i.invalidate()
1929}
1930
1931func (i *Interactive) applyModelSelection(prov, model string) {
1932	if model == "" {
1933		return
1934	}
1935	m, err := provider.FindModel(prov, model)
1936	if err != nil {
1937		i.mu.Lock()
1938		i.statusErr = err.Error()
1939		i.mu.Unlock()
1940		return
1941	}
1942	// Same provider? Just swap the model on the existing agent.
1943	if i.agent != nil && m.Provider == i.cfg.Provider {
1944		i.mu.Lock()
1945		i.cfg.Model = m.ID
1946		i.agent.Model = m.ID
1947		i.statusOK = "model: " + m.ID
1948		i.statusErr = ""
1949		i.mu.Unlock()
1950		if i.cfg.PersistModel != nil {
1951			i.cfg.PersistModel(i.cfg.Provider, m.ID)
1952		}
1953		return
1954	}
1955	// Different provider: rebuild agent (needs credentials for target provider).
1956	if i.cfg.BuildAgentFor == nil {
1957		i.mu.Lock()
1958		i.statusErr = "cannot switch provider: no builder configured"
1959		i.mu.Unlock()
1960		return
1961	}
1962	// Snapshot the current transcript and cumulative usage BEFORE we
1963	// build the replacement agent so we can hand them off. Without
1964	// this the user perceives the entire session as wiped on a
1965	// cross-provider /model swap.
1966	var carryMsgs []provider.Message
1967	var carryCost provider.Usage
1968	if i.agent != nil {
1969		carryMsgs = i.agent.Messages()
1970		carryCost = i.agent.Cost()
1971	}
1972
1973	ag, p, md, err := i.cfg.BuildAgentFor(m.Provider, m.ID)
1974	if err != nil {
1975		i.mu.Lock()
1976		i.statusErr = err.Error()
1977		i.mu.Unlock()
1978		return
1979	}
1980
1981	// Replay the transcript and seed the cost on the freshly-built
1982	// agent. Messages travel cleanly between providers because they
1983	// use the same provider.Message shape; tool-call ids are local
1984	// to a turn so cross-provider continuation never confuses the
1985	// new model (it just sees the assistant's reply, no orphan
1986	// tool_use blocks because /model swaps are gated to idle state).
1987	if len(carryMsgs) > 0 {
1988		ag.SetMessages(carryMsgs)
1989	}
1990	ag.SeedCost(carryCost)
1991
1992	i.mu.Lock()
1993	i.agent = ag
1994	i.cfg.Provider = p
1995	i.cfg.Model = md
1996	i.statusOK = "switched to " + p + " / " + md
1997	i.statusErr = ""
1998	// Render cache keys are width+content based, so the new agent's
1999	// identical messages will reuse the existing entries. Nothing
2000	// to invalidate.
2001	i.mu.Unlock()
2002	if i.cfg.PersistModel != nil {
2003		i.cfg.PersistModel(p, md)
2004	}
2005}
2006
2007func (i *Interactive) handleAuthEvent(ev auth.Event) {
2008	switch ev.Kind {
2009	case "started":
2010		i.dialog.ShowWaiting(ev.URL)
2011	case "browser_open":
2012		// no-op
2013	case "error":
2014		i.dialog.ShowResult(false, ev.Message)
2015	case "success":
2016		// Rebuild the agent with the fresh credential.
2017		ag, prov, model, err := i.cfg.BuildAgent()
2018		if err != nil {
2019			i.dialog.ShowResult(false, err.Error())
2020			return
2021		}
2022		i.mu.Lock()
2023		i.agent = ag
2024		i.cfg.Provider = prov
2025		i.cfg.Model = model
2026		i.statusErr = ""
2027		i.statusOK = "logged in to " + ev.Provider + " via " + ev.Method
2028		i.mu.Unlock()
2029		i.dialog.ShowResult(true, "")
2030	}
2031}
2032
2033// runCompact invokes core.Agent.Compact and reflects the progress in
2034// the tui. It runs in a goroutine so the ui stays responsive; esc/ctrl+c
2035// cancel via the same cancelTurn channel used for normal turns.
2036//
2037// When auto is true the spinner message is pinned to "condensing
2038// history" and the status bar surfaces "(auto)" next to the context
2039// percentage so it's obvious the system triggered this, not the user.
2040func (i *Interactive) runCompact(parent context.Context, auto bool) {
2041	if i.agent == nil {
2042		i.mu.Lock()
2043		i.statusErr = "not logged in. type /login first."
2044		i.mu.Unlock()
2045		return
2046	}
2047	ctx, cancel := context.WithCancel(parent)
2048	i.mu.Lock()
2049	i.busy = true
2050	if auto {
2051		i.spin.StartFixed("condensing history")
2052		i.autoCompacting = true
2053		i.statusOK = "condensing history… (esc to cancel)"
2054	} else {
2055		i.spin.Start()
2056		i.statusOK = "compacting..."
2057	}
2058	i.cancelTurn = cancel
2059	i.statusErr = ""
2060	i.streaming.Reset()
2061	i.streamOn = true
2062	i.scrollOffset = 0
2063	i.helpBlock = nil
2064	i.mu.Unlock()
2065	i.invalidate()
2066
2067	go func() {
2068		sink := func(delta string) {
2069			i.mu.Lock()
2070			i.streaming.WriteString(delta)
2071			i.mu.Unlock()
2072			i.invalidate()
2073		}
2074		summary, err := i.agent.Compact(ctx, 4, sink)
2075		i.mu.Lock()
2076		i.busy = false
2077		i.resetStreamingStateLocked()
2078		i.cancelTurn = nil
2079		i.autoCompacting = false
2080		switch {
2081		case err != nil && ctx.Err() != nil:
2082			i.statusErr = ""
2083			if auto {
2084				i.statusOK = "auto-condense cancelled"
2085			} else {
2086				i.statusOK = "compaction cancelled"
2087			}
2088		case err != nil:
2089			i.statusErr = "compaction failed: " + err.Error()
2090			i.statusOK = ""
2091		default:
2092			i.statusErr = ""
2093			i.statusOK = fmt.Sprintf("compacted transcript (%d chars of summary)", len(summary))
2094			i.lastCtxInput = 0 // reset; next turn will get a fresh measurement
2095			i.toolCalls = map[string]*tui.ToolCallView{}
2096			i.toolOrder = nil
2097			// Transcript was rewritten in place — purge the per-message
2098			// render cache so stale entries keyed on the old messages
2099			// don't linger.
2100			i.view.InvalidateRenderCache()
2101		}
2102		i.mu.Unlock()
2103		i.invalidate()
2104	}()
2105}
2106
2107func (i *Interactive) startTurn(parent context.Context, prompt string) {
2108	if i.agent == nil {
2109		return
2110	}
2111	ctx, cancel := context.WithCancel(parent)
2112	i.mu.Lock()
2113	i.busy = true
2114	i.spin.Start()
2115	i.cancelTurn = cancel
2116	i.statusErr = ""
2117	i.statusOK = ""
2118	i.streaming.Reset()
2119	i.streamOn = true
2120	i.toolCalls = map[string]*tui.ToolCallView{}
2121	i.toolOrder = nil
2122	i.scrollOffset = 0 // jump back to the bottom on new turn
2123	i.parkedTurn = 0   // starting a turn clears the /jump parked state
2124	i.parkedTotal = 0
2125	i.helpBlock = nil // hide the help block once the user asks something
2126	i.mu.Unlock()
2127	i.invalidate()
2128
2129	sink := func(ev core.AgentEvent) {
2130		i.handleEvent(ev)
2131		i.invalidate()
2132	}
2133
2134	go func() {
2135		err := i.agent.Prompt(ctx, prompt, nil, sink)
2136		i.mu.Lock()
2137		i.busy = false
2138		// Don't touch streamPending / streamFlushPending here — the
2139		// pacer may still be draining the final deltas and needs to
2140		// paint them even though Prompt has returned. It will reset
2141		// streamOn on its own once the buffer empties.
2142		if len(i.streamPending) == 0 {
2143			i.streamOn = false
2144		}
2145		i.cancelTurn = nil
2146		if err != nil && ctx.Err() == nil {
2147			i.statusErr = err.Error()
2148		}
2149		// Persist the assistant's reply (and every tool row before
2150		// it) to the session file while the turn memory is hot.
2151		// Without this, WriteNewTranscript only fires at zot exit,
2152		// meaning a crash or ungraceful kill drops the whole
2153		// conversation. FlushSession is idempotent (it advances the
2154		// baseline so subsequent flushes only write new rows).
2155		flush := i.cfg.FlushSession
2156		i.mu.Unlock()
2157		if flush != nil {
2158			flush()
2159		}
2160		i.mu.Lock()
2161		// Pop the next queued message, if any, and relaunch.
2162		var next string
2163		var hasNext bool
2164		if len(i.queued) > 0 && ctx.Err() == nil && err == nil {
2165			next, i.queued = i.queued[0], i.queued[1:]
2166			hasNext = true
2167		}
2168		// If the turn was cancelled or errored, drop the queue so the
2169		// user isn't bombarded with stale messages after an interrupt.
2170		if ctx.Err() != nil || err != nil {
2171			i.queued = nil
2172		}
2173		// Decide whether the next thing to do is an auto-compaction.
2174		// Only fires when the turn completed cleanly AND the queue is
2175		// empty (otherwise a queued message would race the condense).
2176		shouldAutoCompact := !hasNext && err == nil && ctx.Err() == nil && i.shouldAutoCompactLocked()
2177		i.mu.Unlock()
2178		i.invalidate()
2179		parent := i.runCtx
2180		if parent == nil {
2181			parent = context.Background()
2182		}
2183		switch {
2184		case hasNext:
2185			i.startTurn(parent, next)
2186		case shouldAutoCompact:
2187			i.runCompact(parent, true)
2188		}
2189	}()
2190}
2191
2192// autoCompactThreshold is the context-window fraction at which the
2193// agent will auto-compact after a turn ends. 0.85 leaves enough
2194// headroom for one more user prompt + response before we bump the
2195// hard limit.
2196const autoCompactThreshold = 0.85
2197
2198// shouldAutoCompactLocked reports whether the last turn pushed context
2199// usage past the auto-compact threshold. Must be called with i.mu
2200// held; it reads lastCtxInput and the current model's context window.
2201func (i *Interactive) shouldAutoCompactLocked() bool {
2202	if i.agent == nil {
2203		return false
2204	}
2205	if i.autoCompacting {
2206		return false
2207	}
2208	m, err := provider.FindModel(i.cfg.Provider, i.cfg.Model)
2209	if err != nil || m.ContextWindow <= 0 {
2210		return false
2211	}
2212	if i.lastCtxInput <= 0 {
2213		return false
2214	}
2215	return float64(i.lastCtxInput)/float64(m.ContextWindow) >= autoCompactThreshold
2216}
2217
2218func (i *Interactive) handleEvent(ev core.AgentEvent) {
2219	i.mu.Lock()
2220	defer i.mu.Unlock()
2221	switch e := ev.(type) {
2222	case core.EvAssistantStart:
2223		// Fires at the top of every oneTurn, including follow-up
2224		// turns after tool use. Without this, the streaming buffer
2225		// is still marked off from the previous assistant message
2226		// and the final summary text pops in all at once instead
2227		// of typewriter-streaming delta by delta.
2228		i.streaming.Reset()
2229		i.streamPending = i.streamPending[:0]
2230		i.streamFlushPending = false
2231		i.streamOn = true
2232		// Clear the live tool-call overlay. Any tools from the
2233		// previous round are now fully folded into the transcript
2234		// (assistant tool_use block + tool role message with the
2235		// result), so keeping them in the overlay would duplicate
2236		// them in the view — once inside the finalised transcript
2237		// and once below the streaming block, with the streaming
2238		// summary sandwiched in between. The next EvToolUseStart
2239		// will populate fresh entries for this turn's tools.
2240		i.toolCalls = map[string]*tui.ToolCallView{}
2241		i.toolOrder = nil
2242	case core.EvTextDelta:
2243		// Buffer into streamPending; the paintPace ticker drains
2244		// it into i.streaming a few runes at a time for a smooth
2245		// typewriter effect independent of upstream chunk size.
2246		i.streamPending = append(i.streamPending, []rune(e.Delta)...)
2247		i.streamOn = true
2248	case core.EvAssistantMessage:
2249		// OnAssistant + telegram mirroring always fire on message
2250		// arrival — they read the FINAL message content, which is
2251		// complete regardless of what's still in the pacer.
2252		i.assistantMessageSideEffects(e.Message)
2253		// If the pacer still has characters to drain, keep streamOn
2254		// true and mark flush pending; the paintPace ticker will
2255		// drain the remainder and reset streaming state when done.
2256		// Otherwise (rare: full-replay sessions, abort paths) clear
2257		// synchronously so a later render doesn't show stale text.
2258		if len(i.streamPending) > 0 {
2259			i.streamFlushPending = true
2260			return
2261		}
2262		i.resetStreamingStateLocked()
2263	case core.EvToolUseStart:
2264		// Live streaming: pre-create the view so the user sees the
2265		// tool call being composed in real time. Any subsequent
2266		// EvToolCall for the same ID updates the same struct (the
2267		// final parsed args + name are already known here).
2268		if _, exists := i.toolCalls[e.ID]; !exists {
2269			i.toolCalls[e.ID] = &tui.ToolCallView{
2270				ID:        e.ID,
2271				Name:      e.Name,
2272				Streaming: true,
2273			}
2274			i.toolOrder = append(i.toolOrder, e.ID)
2275		}
2276	case core.EvToolUseArgs:
2277		if tc, ok := i.toolCalls[e.ID]; ok {
2278			tc.RawJSONBuf += e.Delta
2279			// Refresh the live path as soon as it parses; used in
2280			// the header (▸ write /Users/pat/Desktop/demo.ts)
2281			// while the content is still streaming.
2282			if p, pok, _ := tui.ExtractPartialStringField(tc.RawJSONBuf, "path"); pok {
2283				tc.LivePath = p
2284			} else if p, pok, _ := tui.ExtractPartialStringField(tc.RawJSONBuf, "file_path"); pok {
2285				tc.LivePath = p
2286			}
2287		}
2288	case core.EvToolUseEnd:
2289		if tc, ok := i.toolCalls[e.ID]; ok {
2290			tc.Streaming = false
2291		}
2292	case core.EvToolCall:
2293		// If we already pre-created the view during streaming, just
2294		// refresh the final Args summary. Otherwise create a new one
2295		// (non-streaming providers or legacy paths).
2296		if tc, ok := i.toolCalls[e.ID]; ok {
2297			tc.Args = tui.ShortArgs(e.Name, e.Args)
2298			tc.Streaming = false
2299		} else {
2300			i.toolCalls[e.ID] = &tui.ToolCallView{
2301				ID:   e.ID,
2302				Name: e.Name,
2303				Args: tui.ShortArgs(e.Name, e.Args),
2304			}
2305			i.toolOrder = append(i.toolOrder, e.ID)
2306		}
2307	case core.EvToolResult:
2308		if tc, ok := i.toolCalls[e.ID]; ok {
2309			tc.Done = true
2310			tc.Error = e.Result.IsError
2311			var text strings.Builder
2312			for _, c := range e.Result.Content {
2313				if tb, ok := c.(provider.TextBlock); ok {
2314					if text.Len() > 0 {
2315						text.WriteString("\n")
2316					}
2317					text.WriteString(tb.Text)
2318				}
2319			}
2320			tc.Result = text.String()
2321		}
2322		if i.cfg.OnToolResult != nil {
2323			i.cfg.OnToolResult(e.ID, e.Result)
2324		}
2325	case core.EvUsage:
2326		i.cumUsage = e.Cumulative
2327		if e.Usage.InputTokens > 0 {
2328			i.lastCtxInput = e.Usage.InputTokens + e.Usage.CacheReadTokens + e.Usage.CacheWriteTokens
2329		}
2330	case core.EvTurnEnd:
2331		if e.Stop == provider.StopAborted {
2332			// Aborted turn: discard the partial streaming text (it
2333			// is not persisted in the transcript) and clear any
2334			// transient error. Also drop anything still buffered in
2335			// the pacer so nothing keeps drawing after the cancel.
2336			i.resetStreamingStateLocked()
2337			i.statusErr = ""
2338			i.statusOK = "cancelled"
2339			return
2340		}
2341		if e.Err != nil && !strings.Contains(e.Err.Error(), "context canceled") {
2342			i.statusErr = e.Err.Error()
2343		}
2344	}
2345}
2346
2347// Agent returns the current agent, if any. Used by cli.go to flush the
2348// final transcript to the session file.
2349func (i *Interactive) Agent() *core.Agent {
2350	i.mu.Lock()
2351	defer i.mu.Unlock()
2352	return i.agent
2353}
2354
2355// silence unused import in some build configs
2356var _ = fmt.Sprintf
2357
2358// runReloadExt triggers a live reload of every extension (discovered
2359// + explicit). Runs on a goroutine so the TUI stays responsive; the
2360// Manager.Reload takes a couple of hundred ms to shut down subprocs
2361// and respawn them. Shows a status line throughout.
2362func (i *Interactive) runReloadExt(ctx context.Context) {
2363	if i.cfg.Extensions == nil {
2364		i.mu.Lock()
2365		i.statusErr = "no extension manager in this build"
2366		i.mu.Unlock()
2367		i.invalidate()
2368		return
2369	}
2370	i.mu.Lock()
2371	i.statusOK = "reloading extensions…"
2372	i.statusErr = ""
2373	i.mu.Unlock()
2374	i.invalidate()
2375
2376	go func() {
2377		stats := i.cfg.Extensions.Reload(ctx, 2*time.Second)
2378		msg := fmt.Sprintf("reloaded: %d stopped, %d loaded (%d ready)", stats.Stopped, stats.Loaded, stats.Ready)
2379		if len(stats.Errors) > 0 {
2380			msg += fmt.Sprintf(", %d error(s)", len(stats.Errors))
2381		}
2382		i.mu.Lock()
2383		i.statusOK = msg
2384		i.statusErr = ""
2385		i.mu.Unlock()
2386		i.invalidate()
2387	}()
2388}
2389
2390// Confirm implements core.Confirmer. The agent goroutine calls
2391// this synchronously before every tool invocation when --no-yolo is
2392// active. We push the request onto the confirmDialog queue, trigger
2393// a redraw, and block the caller until the user answers.
2394//
2395// If the session is cancelled or the TUI exits mid-prompt, any
2396// pending request is refused via CancelAll so the agent doesn't
2397// deadlock.
2398func (i *Interactive) Confirm(toolName string, preview string) core.ConfirmDecision {
2399	resp := make(chan core.ConfirmDecision, 1)
2400	i.confirmDialog.Enqueue(&confirmRequest{
2401		toolName: toolName,
2402		preview:  preview,
2403		resp:     resp,
2404	})
2405	i.invalidate()
2406	return <-resp
2407}
2408
2409// runYoloOn disables --no-yolo for the rest of the session. Tool
2410// calls run without prompting after this; there's intentionally no
2411// way to re-enable gating mid-session, if the user wants that back
2412// they can exit and restart with --no-yolo.
2413func (i *Interactive) runYoloOn() {
2414	if i.cfg.ConfirmGate == nil {
2415		i.mu.Lock()
2416		i.statusOK = "yolo mode is already on (no --no-yolo in this session)"
2417		i.statusErr = ""
2418		i.mu.Unlock()
2419		i.invalidate()
2420		return
2421	}
2422	i.cfg.ConfirmGate.AllowAll()
2423	// Also auto-allow any currently pending confirmation so the
2424	// agent doesn't deadlock if /yolo is typed while a prompt is
2425	// open.
2426	i.confirmDialog.AllowAllPending()
2427	i.mu.Lock()
2428	i.statusOK = "yolo engaged: no more tool-call confirmations this session"
2429	i.statusErr = ""
2430	i.mu.Unlock()
2431	i.invalidate()
2432}
2433
2434// openTelegramDialog shows the picker for `/telegram` with no arg.
2435// Items depend on current state: disconnect + status when running,
2436// connect + status when stopped.
2437func (i *Interactive) openTelegramDialog() {
2438	items := i.telegramMenuItems()
2439	if len(items) == 0 {
2440		i.mu.Lock()
2441		i.statusErr = "telegram not configured. run `zot telegram-bot setup` first."
2442		i.mu.Unlock()
2443		i.invalidate()
2444		return
2445	}
2446	i.telegramDialog.Open(items)
2447	i.invalidate()
2448}
2449
2450// telegramMenuItems builds the dialog entries for the current
2451// bridge state. Returns empty when no bot.json exists so the
2452// caller can show a helpful status line instead of an empty menu.
2453func (i *Interactive) telegramMenuItems() []telegramItem {
2454	cfg, err := telegram.LoadConfig(i.cfg.ZotHome)
2455	if err != nil || cfg.BotToken == "" {
2456		return nil
2457	}
2458	var items []telegramItem
2459	if i.telegramBridge != nil && i.telegramBridge.Active() {
2460		items = append(items, telegramItem{label: "disconnect", action: "disconnect", hint: "stop mirroring"})
2461		st := i.telegramBridge.State()
2462		hint := "active"
2463		if st.Username != "" {
2464			hint += " as @" + st.Username
2465		}
2466		items = append(items, telegramItem{label: "status", action: "status", hint: hint})
2467	} else {
2468		label := "connect"
2469		hint := "start mirroring dms into this session"
2470		if cfg.AllowedUserID == 0 {
2471			hint = "awaiting pairing (send /start to the bot once connected)"
2472		}
2473		items = append(items, telegramItem{label: label, action: "connect", hint: hint})
2474		items = append(items, telegramItem{label: "status", action: "status", hint: "disconnected"})
2475	}
2476	return items
2477}
2478
2479// doTelegram dispatches one of the three explicit actions. Called
2480// from /telegram <action> or after the picker selects a row.
2481func (i *Interactive) doTelegram(action string) {
2482	switch action {
2483	case "connect":
2484		i.telegramConnect()
2485	case "disconnect":
2486		i.telegramDisconnect()
2487	case "status":
2488		i.telegramStatus()
2489	default:
2490		i.mu.Lock()
2491		i.statusErr = "unknown telegram action: " + action + " (use connect, disconnect, or status)"
2492		i.mu.Unlock()
2493		i.invalidate()
2494	}
2495}
2496
2497// telegramConnect starts the bridge. Refuses if it's already
2498// running or if the on-disk bot.json is missing a token.
2499func (i *Interactive) telegramConnect() {
2500	if i.telegramBridge != nil && i.telegramBridge.Active() {
2501		i.mu.Lock()
2502		i.statusOK = "telegram already connected"
2503		i.statusErr = ""
2504		i.mu.Unlock()
2505		i.invalidate()
2506		return
2507	}
2508	cfg, err := telegram.LoadConfig(i.cfg.ZotHome)
2509	if err != nil {
2510		i.mu.Lock()
2511		i.statusErr = "telegram: " + err.Error()
2512		i.mu.Unlock()
2513		i.invalidate()
2514		return
2515	}
2516	if cfg.BotToken == "" {
2517		i.mu.Lock()
2518		i.statusErr = "telegram: no bot token configured. run `zot telegram-bot setup` first."
2519		i.mu.Unlock()
2520		i.invalidate()
2521		return
2522	}
2523	// Refuse to start when a background daemon is already polling
2524	// the same bot. Two concurrent long-poll consumers race each
2525	// update and one always loses, so DMs get half-delivered. The
2526	// user can `zot telegram-bot stop` first, then /telegram connect.
2527	if pid, alive, _ := telegram.IsRunning(i.cfg.ZotHome); alive && pid > 0 {
2528		i.mu.Lock()
2529		i.statusErr = fmt.Sprintf("telegram: bot daemon already running (pid %d). stop it with `zot telegram-bot stop` first.", pid)
2530		i.mu.Unlock()
2531		i.invalidate()
2532		return
2533	}
2534	i.telegramBridge = &telegram.Bridge{
2535		Client: telegram.NewClient(cfg.BotToken),
2536		Config: cfg,
2537		Save: func(next telegram.Config) error {
2538			return telegram.SaveConfig(i.cfg.ZotHome, next)
2539		},
2540		Host: &telegramHost{iv: i},
2541	}
2542	if err := i.telegramBridge.Start(i.runCtx); err != nil {
2543		i.telegramBridge = nil
2544		i.mu.Lock()
2545		i.statusErr = "telegram connect failed: " + err.Error()
2546		i.mu.Unlock()
2547		i.invalidate()
2548		return
2549	}
2550	state := i.telegramBridge.State()
2551	label := "telegram connected"
2552	if state.Username != "" {
2553		label += " as @" + state.Username
2554	}
2555	if state.PairedID == 0 {
2556		label += " — send /start to the bot from your phone to claim it"
2557	}
2558	i.mu.Lock()
2559	i.statusOK = label
2560	i.statusErr = ""
2561	i.mu.Unlock()
2562	i.invalidate()
2563}
2564
2565// telegramDisconnect stops the bridge. No-op when already stopped.
2566func (i *Interactive) telegramDisconnect() {
2567	if i.telegramBridge == nil || !i.telegramBridge.Active() {
2568		i.mu.Lock()
2569		i.statusOK = "telegram already disconnected"
2570		i.statusErr = ""
2571		i.mu.Unlock()
2572		i.invalidate()
2573		return
2574	}
2575	i.telegramBridge.Stop()
2576	i.mu.Lock()
2577	i.statusOK = "telegram disconnected"
2578	i.statusErr = ""
2579	i.mu.Unlock()
2580	i.invalidate()
2581}
2582
2583// telegramStatus writes a one-liner describing the bridge state.
2584// Reports on both the in-tui bridge and the background daemon so
2585// the user isn't confused when the daemon owns the poll loop.
2586func (i *Interactive) telegramStatus() {
2587	var msg string
2588	if i.telegramBridge != nil && i.telegramBridge.Active() {
2589		s := i.telegramBridge.State()
2590		msg = "telegram: connected (tui bridge)"
2591		if s.Username != "" {
2592			msg += " as @" + s.Username
2593		}
2594		if s.PairedID != 0 {
2595			msg += fmt.Sprintf(" · paired with user %d", s.PairedID)
2596		} else {
2597			msg += " · awaiting pairing"
2598		}
2599	} else if pid, alive, _ := telegram.IsRunning(i.cfg.ZotHome); alive && pid > 0 {
2600		msg = fmt.Sprintf("telegram: background daemon running (pid %d) · /telegram connect won't work until you stop it", pid)
2601	} else {
2602		cfg, _ := telegram.LoadConfig(i.cfg.ZotHome)
2603		if cfg.BotToken == "" {
2604			msg = "telegram: not configured. run `zot telegram-bot setup` first."
2605		} else {
2606			msg = "telegram: disconnected"
2607			if cfg.BotUsername != "" {
2608				msg += " (@" + cfg.BotUsername + " ready to connect)"
2609			}
2610		}
2611	}
2612	i.mu.Lock()
2613	i.statusOK = msg
2614	i.statusErr = ""
2615	i.mu.Unlock()
2616	i.invalidate()
2617}
2618
2619// telegramHost adapts *Interactive to telegram.Host so the bridge
2620// can call back into the TUI without importing modes directly.
2621type telegramHost struct{ iv *Interactive }
2622
2623func (h *telegramHost) SubmitOrQueue(prompt string, images []provider.ImageBlock) {
2624	h.iv.SubmitOrQueue(prompt, images)
2625}
2626
2627func (h *telegramHost) CancelTurn() { h.iv.CancelTurn() }
2628
2629func (h *telegramHost) Notify(level, message string) {
2630	h.iv.mu.Lock()
2631	switch level {
2632	case "error", "warn":
2633		h.iv.statusErr = message
2634		h.iv.statusOK = ""
2635	default:
2636		h.iv.statusOK = message
2637		h.iv.statusErr = ""
2638	}
2639	h.iv.mu.Unlock()
2640	h.iv.invalidate()
2641}
2642
2643// openSessionOpsDialog shows the picker for `/session` with no arg.
2644// Always offers export, import, fork, tree; the handlers bail with
2645// a clear status message when the precondition isn't met (empty
2646// transcript on fork; no parent/siblings on tree).
2647func (i *Interactive) openSessionOpsDialog() {
2648	items := []sessionOpsItem{
2649		{label: "export", action: "export", hint: "write the current session to a .zotsession file"},
2650		{label: "import", action: "import", hint: "load a .zotsession file into this directory"},
2651		{label: "fork", action: "fork", hint: "branch from a past user message into a new session"},
2652		{label: "tree", action: "tree", hint: "switch between branches in this directory"},
2653	}
2654	i.sessionOpsDialog.Open(items)
2655	i.invalidate()
2656}
2657
2658// doSessionOp dispatches export, import, fork, or tree. arg is the
2659// optional positional argument from e.g. /session export <path>
2660// or /session import <path>; fork and tree ignore it.
2661func (i *Interactive) doSessionOp(action, arg string) {
2662	switch action {
2663	case "export":
2664		i.doSessionExport(arg)
2665	case "import":
2666		i.doSessionImport(arg)
2667	case "fork":
2668		i.doSessionFork()
2669	case "tree":
2670		i.doSessionTree()
2671	default:
2672		i.mu.Lock()
2673		i.statusErr = "unknown /session action: " + action + " (use export, import, fork, or tree)"
2674		i.mu.Unlock()
2675		i.invalidate()
2676	}
2677}
2678
2679// doSessionExport writes the live session file to destination path
2680// dst. When dst is empty we default to ~/Downloads (falling back to
2681// the user's home directory if it doesn't exist). The helper
2682// expands a leading `~` and creates any missing parent directories.
2683func (i *Interactive) doSessionExport(dst string) {
2684	if i.cfg.CurrentSessionPath == nil {
2685		i.mu.Lock()
2686		i.statusErr = "export: no session is active (running with --no-session?)"
2687		i.mu.Unlock()
2688		i.invalidate()
2689		return
2690	}
2691	src := i.cfg.CurrentSessionPath()
2692	if src == "" {
2693		i.mu.Lock()
2694		i.statusErr = "export: no session is active (running with --no-session?)"
2695		i.mu.Unlock()
2696		i.invalidate()
2697		return
2698	}
2699	// Persist any in-memory agent messages to the session file so
2700	// the export carries the full conversation. Without this, the
2701	// default lazy-flush-at-exit strategy leaves most of a running
2702	// session unwritten and the export ends up with only the meta.
2703	if i.cfg.FlushSession != nil {
2704		i.cfg.FlushSession()
2705	}
2706	dst = unquotePath(dst)
2707	if dst == "" {
2708		dst = defaultExportDir()
2709	} else {
2710		dst = expandTilde(dst)
2711	}
2712	out, err := core.ExportSession(src, dst)
2713	if err != nil {
2714		i.mu.Lock()
2715		i.statusErr = "export: " + err.Error()
2716		i.mu.Unlock()
2717		i.invalidate()
2718		return
2719	}
2720	i.mu.Lock()
2721	i.statusOK = "exported session to " + friendlyPath(out)
2722	i.statusErr = ""
2723	i.mu.Unlock()
2724	i.invalidate()
2725}
2726
2727// doSessionImport copies the .zotsession file at src into the
2728// running cwd's sessions directory and loads it as the active
2729// session, same as `/sessions` -> pick. When src is empty we ask
2730// the user to pass a path (no usable default here).
2731func (i *Interactive) doSessionImport(src string) {
2732	src = unquotePath(src)
2733	if src == "" {
2734		i.mu.Lock()
2735		i.statusErr = "import: pass a path — e.g. /session import ~/Downloads/work.zotsession"
2736		i.mu.Unlock()
2737		i.invalidate()
2738		return
2739	}
2740	src = expandTilde(src)
2741	if _, err := os.Stat(src); err != nil {
2742		i.mu.Lock()
2743		i.statusErr = "import: " + err.Error()
2744		i.mu.Unlock()
2745		i.invalidate()
2746		return
2747	}
2748	newPath, err := core.ImportSession(src, i.cfg.ZotHome, i.cfg.CWD, i.cfg.Version)
2749	if err != nil {
2750		i.mu.Lock()
2751		i.statusErr = "import: " + err.Error()
2752		i.mu.Unlock()
2753		i.invalidate()
2754		return
2755	}
2756	if i.cfg.LoadSession == nil {
2757		i.mu.Lock()
2758		i.statusOK = "imported session at " + friendlyPath(newPath) + " (run /sessions to resume it)"
2759		i.statusErr = ""
2760		i.mu.Unlock()
2761		i.invalidate()
2762		return
2763	}
2764	if err := i.cfg.LoadSession(newPath); err != nil {
2765		i.mu.Lock()
2766		i.statusErr = "import: load failed: " + err.Error()
2767		i.mu.Unlock()
2768		i.invalidate()
2769		return
2770	}
2771	i.mu.Lock()
2772	i.statusOK = "imported and switched to session " + friendlyPath(newPath)
2773	i.statusErr = ""
2774	i.mu.Unlock()
2775	i.invalidate()
2776}
2777
2778// defaultExportDir returns ~/Downloads when it exists, or ~ as a
2779// fallback, or /tmp on exotic machines with no home dir.
2780func defaultExportDir() string {
2781	home, err := os.UserHomeDir()
2782	if err != nil || home == "" {
2783		return os.TempDir()
2784	}
2785	downloads := filepath.Join(home, "Downloads")
2786	if fi, err := os.Stat(downloads); err == nil && fi.IsDir() {
2787		return downloads
2788	}
2789	return home
2790}
2791
2792// expandTilde turns a leading ~ into the user's home directory.
2793// Returns the input unchanged when there's no tilde or no home.
2794func expandTilde(p string) string {
2795	if p == "" || p[0] != '~' {
2796		return p
2797	}
2798	home, err := os.UserHomeDir()
2799	if err != nil || home == "" {
2800		return p
2801	}
2802	if len(p) == 1 {
2803		return home
2804	}
2805	if p[1] == '/' || p[1] == filepath.Separator {
2806		return filepath.Join(home, p[2:])
2807	}
2808	return p
2809}
2810
2811// unquotePath strips a matching pair of surrounding single or
2812// double quotes. Drag-drop paste in the tui auto-quotes dropped
2813// file paths so the shell-like `/session import 'foo bar.zs'`
2814// stays well-formed; when the TUI's own slash handler consumes
2815// the arg, we want the raw path back.
2816func unquotePath(p string) string {
2817	p = strings.TrimSpace(p)
2818	if len(p) >= 2 {
2819		first := p[0]
2820		last := p[len(p)-1]
2821		if (first == '\'' && last == '\'') || (first == '"' && last == '"') {
2822			p = p[1 : len(p)-1]
2823		}
2824	}
2825	return p
2826}
2827
2828// friendlyPath collapses the user's home directory to a leading ~
2829// so status messages read cleanly. Falls back to the raw path when
2830// the home dir is unknown.
2831func friendlyPath(p string) string {
2832	home, err := os.UserHomeDir()
2833	if err != nil || home == "" {
2834		return p
2835	}
2836	if strings.HasPrefix(p, home+string(filepath.Separator)) {
2837		return "~" + p[len(home):]
2838	}
2839	return p
2840}
2841
2842// doSessionFork opens the /jump turn picker in "fork mode". The
2843// next selection branches the current session at that user turn
2844// instead of scrolling the viewport to it.
2845func (i *Interactive) doSessionFork() {
2846	if i.cfg.CurrentSessionPath == nil || i.cfg.CurrentSessionPath() == "" {
2847		i.mu.Lock()
2848		i.statusErr = "fork: no session is active (running with --no-session?)"
2849		i.mu.Unlock()
2850		i.invalidate()
2851		return
2852	}
2853	msgs := []provider.Message{}
2854	if i.agent != nil {
2855		msgs = i.agent.Messages()
2856	}
2857	if len(msgs) == 0 {
2858		i.mu.Lock()
2859		i.statusErr = "fork: transcript is empty; nothing to fork from"
2860		i.mu.Unlock()
2861		i.invalidate()
2862		return
2863	}
2864	i.pendingFork = true
2865	i.jumpDialog.Open(msgs, "")
2866	i.invalidate()
2867}
2868
2869// doSessionTree shows the branch topology picker for this cwd.
2870// Pick an entry to switch into it (same semantics as /sessions
2871// picking a past session, but with the parent/child indentation).
2872func (i *Interactive) doSessionTree() {
2873	if i.cfg.ZotHome == "" || i.cfg.CWD == "" {
2874		i.mu.Lock()
2875		i.statusErr = "tree: session storage not configured"
2876		i.mu.Unlock()
2877		i.invalidate()
2878		return
2879	}
2880	// Flush the running agent's transcript first so its message
2881	// count + latest preview are accurate in the tree.
2882	if i.cfg.FlushSession != nil {
2883		i.cfg.FlushSession()
2884	}
2885	roots := core.BuildSessionTree(i.cfg.ZotHome, i.cfg.CWD)
2886	if len(roots) == 0 {
2887		i.mu.Lock()
2888		i.statusErr = "tree: no sessions in this directory yet"
2889		i.mu.Unlock()
2890		i.invalidate()
2891		return
2892	}
2893	current := ""
2894	if i.cfg.CurrentSessionPath != nil {
2895		current = i.cfg.CurrentSessionPath()
2896	}
2897	if !i.sessionTreeDialog.Open(roots, current) {
2898		i.mu.Lock()
2899		i.statusErr = "tree: no branches to show"
2900		i.mu.Unlock()
2901	}
2902	i.invalidate()
2903}
2904
2905// applySessionTreeSelection switches the running agent to the
2906// session file at path. Thin wrapper around LoadSession that also
2907// writes a status line.
2908func (i *Interactive) applySessionTreeSelection(path string) {
2909	if i.cfg.LoadSession == nil {
2910		i.mu.Lock()
2911		i.statusErr = "tree: session swap not available in this build"
2912		i.mu.Unlock()
2913		i.invalidate()
2914		return
2915	}
2916	if err := i.cfg.LoadSession(path); err != nil {
2917		i.mu.Lock()
2918		i.statusErr = "tree: load failed: " + err.Error()
2919		i.mu.Unlock()
2920		i.invalidate()
2921		return
2922	}
2923	i.mu.Lock()
2924	i.statusOK = "switched to branch " + friendlyPath(path)
2925	i.statusErr = ""
2926	i.mu.Unlock()
2927	i.invalidate()
2928}
2929
2930// applyForkSelection branches the current session at msgIdx+1 (so
2931// the selected user message and everything before it is included
2932// in the new branch), then switches the running agent to the new
2933// file. Called from the jump-dialog handler when pendingFork=true.
2934func (i *Interactive) applyForkSelection(msgIdx int) {
2935	i.pendingFork = false
2936	if i.cfg.CurrentSessionPath == nil {
2937		i.mu.Lock()
2938		i.statusErr = "fork: no session is active"
2939		i.mu.Unlock()
2940		i.invalidate()
2941		return
2942	}
2943	src := i.cfg.CurrentSessionPath()
2944	if src == "" {
2945		i.mu.Lock()
2946		i.statusErr = "fork: no session is active"
2947		i.mu.Unlock()
2948		i.invalidate()
2949		return
2950	}
2951	if i.cfg.FlushSession != nil {
2952		i.cfg.FlushSession()
2953	}
2954	// msgIdx is 0-indexed message position; copy msgIdx+1 rows so
2955	// the selected user message is included.
2956	upTo := msgIdx + 1
2957	newPath, err := core.BranchSession(src, i.cfg.ZotHome, i.cfg.CWD, i.cfg.Version, upTo)
2958	if err != nil {
2959		i.mu.Lock()
2960		i.statusErr = "fork: " + err.Error()
2961		i.mu.Unlock()
2962		i.invalidate()
2963		return
2964	}
2965	if i.cfg.LoadSession == nil {
2966		i.mu.Lock()
2967		i.statusOK = "forked at message " + formatInt(upTo) + " (run /sessions to resume)"
2968		i.statusErr = ""
2969		i.mu.Unlock()
2970		i.invalidate()
2971		return
2972	}
2973	if err := i.cfg.LoadSession(newPath); err != nil {
2974		i.mu.Lock()
2975		i.statusErr = "fork: switch failed: " + err.Error()
2976		i.mu.Unlock()
2977		i.invalidate()
2978		return
2979	}
2980	i.mu.Lock()
2981	i.statusOK = "forked and switched to new branch at " + friendlyPath(newPath)
2982	i.statusErr = ""
2983	i.mu.Unlock()
2984	i.invalidate()
2985}
2986
2987// formatInt is a tiny strconv.Itoa shim; keeps the handler above
2988// from needing a strconv import just for one call.
2989func formatInt(n int) string {
2990	return fmt.Sprintf("%d", n)
2991}
2992
2993// assistantText returns the concatenated text of every TextBlock in
2994// m. Used by the streaming-view dedupe guard to tell when a live
2995// streamed reply has already been promoted into the transcript.
2996func assistantText(m provider.Message) string {
2997	var sb strings.Builder
2998	for _, c := range m.Content {
2999		if tb, ok := c.(provider.TextBlock); ok {
3000			if sb.Len() > 0 {
3001				sb.WriteByte('\n')
3002			}
3003			sb.WriteString(tb.Text)
3004		}
3005	}
3006	return sb.String()
3007}
3008
3009// resetStreamingStateLocked clears every piece of streaming state
3010// in one shot. Used by abort paths (turn cancel, compact finish,
3011// queue drain) so the pacer doesn't keep draining stale runes from
3012// a prior turn. Must be called with i.mu held.
3013func (i *Interactive) resetStreamingStateLocked() {
3014	i.streaming.Reset()
3015	i.streamPending = i.streamPending[:0]
3016	i.streamFlushPending = false
3017	i.streamOn = false
3018}
3019
3020// assistantMessageSideEffects runs the non-visual hooks attached to
3021// EvAssistantMessage: the host-provided OnAssistant callback and the
3022// telegram-bridge mirror. Called with i.mu held.
3023//
3024// Factored out of handleEvent because the streaming pacer may defer
3025// visual reset until after the last buffered rune has painted, but
3026// the callbacks themselves must fire on message arrival so
3027// downstream observers (session persistence, telegram, cost panels)
3028// don't wait on a UI animation to catch up.
3029func (i *Interactive) assistantMessageSideEffects(m provider.Message) {
3030	if i.cfg.OnAssistant != nil {
3031		i.cfg.OnAssistant(m)
3032	}
3033	if i.telegramBridge != nil && i.telegramBridge.Active() {
3034		var sb strings.Builder
3035		for _, c := range m.Content {
3036			if tb, ok := c.(provider.TextBlock); ok {
3037				if sb.Len() > 0 {
3038					sb.WriteString("\n")
3039				}
3040				sb.WriteString(tb.Text)
3041			}
3042		}
3043		if text := sb.String(); strings.TrimSpace(text) != "" {
3044			go i.telegramBridge.OnAssistantText(text)
3045		}
3046	}
3047}
3048
3049// paintPaceRate is how many runes the streaming pacer releases per
3050// tick. With a 16ms tick, 6 runes/tick is ~375 runes/s — fast enough
3051// that a 500-rune summary finishes in ~1.3s, slow enough to look
3052// like a human typing. Empirically matches the feel of provider
3053// paths that already drip-stream natively.
3054const paintPaceRate = 6
3055
3056// paintPaceInterval is the tick interval for the streaming pacer.
3057// 16ms lines up with the redraw throttle so we never paint faster
3058// than the terminal can keep up.
3059const paintPaceInterval = 16 * time.Millisecond
3060
3061// runStreamPacer drains buffered deltas from streamPending into
3062// streaming a small batch per tick, invalidating after each move.
3063// It stops when the context cancels (tui shutdown).
3064//
3065// Why a pacer: providers differ wildly in how they chunk their
3066// text_delta events. The API-key path on Anthropic emits ~30 drips
3067// for a 400-token summary; the OAuth path can coalesce the same
3068// summary into 3 fat chunks, visually indistinguishable from "the
3069// whole reply just appeared". The pacer normalizes that so every
3070// path looks the same on screen.
3071func (i *Interactive) runStreamPacer(ctx context.Context) {
3072	t := time.NewTicker(paintPaceInterval)
3073	defer t.Stop()
3074	for {
3075		select {
3076		case <-ctx.Done():
3077			return
3078		case <-t.C:
3079			i.mu.Lock()
3080			if len(i.streamPending) == 0 {
3081				// EvAssistantMessage already fired but the pacer
3082				// was still draining a tick ago. Everything is now
3083				// painted; clear the streaming flags so the next
3084				// redraw shows the finalised transcript message
3085				// and hides the streaming overlay.
3086				if i.streamFlushPending {
3087					i.streamFlushPending = false
3088					i.streaming.Reset()
3089					i.streamOn = false
3090					i.mu.Unlock()
3091					i.invalidate()
3092					continue
3093				}
3094				i.mu.Unlock()
3095				continue
3096			}
3097			n := paintPaceRate
3098			if n > len(i.streamPending) {
3099				n = len(i.streamPending)
3100			}
3101			i.streaming.WriteString(string(i.streamPending[:n]))
3102			i.streamPending = i.streamPending[n:]
3103			i.mu.Unlock()
3104			i.invalidate()
3105		}
3106	}
3107}