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.Clear()
1172				i.suggest.Reset()
1173				return i.runSlash(ctx, name)
1174			}
1175		case tui.KeyEsc:
1176			i.ed.Clear()
1177			i.suggest.Reset()
1178			return false
1179		}
1180	}
1181
1182	if submit := i.ed.HandleKey(k); submit {
1183		// SubmitValue() expands any [pasted text #N +L lines]
1184		// placeholders back into their bodies; the raw Value()
1185		// is only what the user sees on screen.
1186		text := strings.TrimRight(i.ed.SubmitValue(), "\n")
1187		if text == "" {
1188			return false
1189		}
1190		i.ed.Clear()
1191		i.suggest.Reset()
1192
1193		if looksLikeSlashCommand(text) {
1194			head := text
1195			rest := ""
1196			if idx := strings.IndexAny(text, " \t"); idx >= 0 {
1197				head = text[:idx]
1198				rest = strings.TrimSpace(text[idx:])
1199			}
1200			if !isKnownSlashCommand(text) {
1201				// Try extensions before giving up. Extensions register
1202				// commands by bare name (no leading slash); strip it here.
1203				extName := strings.TrimPrefix(head, "/")
1204				if i.cfg.Extensions != nil && i.cfg.Extensions.HasCommand(extName) {
1205					go i.invokeExtensionCommand(ctx, extName, rest)
1206					return false
1207				}
1208				i.mu.Lock()
1209				i.statusErr = "unknown command " + head + " — type /help to see the list"
1210				i.statusOK = ""
1211				i.mu.Unlock()
1212				return false
1213			}
1214			// Slash commands run regardless of busy state. Commands that
1215			// would mutate the transcript or replace the agent (/clear,
1216			// /compact, /logout, /login, /model) cancel the active turn
1217			// first and wait for the goroutine to wind down so they don't
1218			// race with a streaming response. Safe commands (/help,
1219			// /jump, /sessions, /jail, /unjail, /exit) run immediately
1220			// without disturbing the active turn.
1221			if slashCancelsTurn(head) {
1222				i.cancelAndWaitForIdle()
1223			}
1224			return i.runSlash(ctx, text)
1225		}
1226
1227		if i.agent == nil {
1228			i.mu.Lock()
1229			i.statusErr = "not logged in. type /login first."
1230			i.mu.Unlock()
1231			return false
1232		}
1233		// Mirror the user's typed prompt into the paired Telegram
1234		// chat (when the bridge is active) so the Telegram thread
1235		// stays a complete record of the session, not just the half
1236		// that originated on the phone. On a goroutine so the
1237		// network write doesn't delay the local turn.
1238		if i.telegramBridge != nil && i.telegramBridge.Active() {
1239			go i.telegramBridge.OnUserTyped(text)
1240		}
1241		// If a turn is already in flight, queue this prompt instead of
1242		// starting a second one. The drain loop at the end of startTurn
1243		// will pick it up when the current turn finishes.
1244		i.mu.Lock()
1245		if i.busy {
1246			i.queued = append(i.queued, text)
1247			i.mu.Unlock()
1248			i.invalidate()
1249			return false
1250		}
1251		i.mu.Unlock()
1252		i.startTurn(ctx, text)
1253	}
1254	return false
1255}
1256
1257// invokeExtensionCommand fires an extension-registered slash command
1258// in a background goroutine, awaits the response, and applies the
1259// requested action (prompt / insert / display / noop). Errors and
1260// timeouts surface as a status_err line.
1261func (i *Interactive) invokeExtensionCommand(ctx context.Context, name, args string) {
1262	resp, err := i.cfg.Extensions.Invoke(ctx, name, args, 30*time.Second)
1263	if err != nil {
1264		i.mu.Lock()
1265		i.statusErr = "extension /" + name + ": " + err.Error()
1266		i.statusOK = ""
1267		i.mu.Unlock()
1268		i.invalidate()
1269		return
1270	}
1271	if resp.Error != "" {
1272		i.mu.Lock()
1273		i.statusErr = "extension /" + name + ": " + resp.Error
1274		i.statusOK = ""
1275		i.mu.Unlock()
1276		i.invalidate()
1277		return
1278	}
1279	switch resp.Action {
1280	case "prompt":
1281		if strings.TrimSpace(resp.Prompt) == "" {
1282			return
1283		}
1284		i.startTurn(i.runCtx, resp.Prompt)
1285	case "insert":
1286		i.ed.Insert(resp.Insert)
1287		i.invalidate()
1288	case "display":
1289		i.appendExtensionNote(name, resp.Display, "info")
1290	case "noop", "":
1291		// nothing
1292	default:
1293		i.mu.Lock()
1294		i.statusErr = "extension /" + name + ": unknown action " + resp.Action
1295		i.mu.Unlock()
1296		i.invalidate()
1297	}
1298}
1299
1300// appendExtensionNote renders an extension-originated note in the
1301// chat. Levels: "info" (muted), "warn" (warning), "error" (error),
1302// "success" (tool/ok green).
1303func (i *Interactive) appendExtensionNote(extName, msg, level string) {
1304	if msg == "" {
1305		return
1306	}
1307	i.mu.Lock()
1308	defer i.mu.Unlock()
1309	color := i.cfg.Theme.Muted
1310	switch level {
1311	case "warn":
1312		color = i.cfg.Theme.Warning
1313	case "error":
1314		color = i.cfg.Theme.Error
1315	case "success":
1316		color = i.cfg.Theme.Tool
1317	}
1318	prefix := i.cfg.Theme.FG256(i.cfg.Theme.Accent, "["+extName+"] ")
1319	for _, line := range strings.Split(msg, "\n") {
1320		i.statusOK = "" // clear any stale ok
1321		i.statusErr = ""
1322		i.extNotes = append(i.extNotes, prefix+i.cfg.Theme.FG256(color, line))
1323	}
1324}
1325
1326// HostHooks implementation for the extension manager. The manager
1327// holds an interface, not a concrete *Interactive, so these methods
1328// are the only thing the manager sees.
1329
1330// Notify is the manager's NotifyFromExt entry point.
1331func (i *Interactive) Notify(extName, level, message string) {
1332	i.appendExtensionNote(extName, message, level)
1333	i.invalidate()
1334}
1335
1336// Submit feeds text through the agent loop as if the user had typed it.
1337func (i *Interactive) Submit(text string) {
1338	i.startTurn(i.runCtx, text)
1339}
1340
1341// SubmitOrQueue runs text immediately if the agent is idle, or
1342// appends it to the pending queue if a turn is already in flight.
1343// Used by the telegram bridge (and by the editor submit path) so
1344// both input sources share the same "queue behind an active turn"
1345// semantics. Images are ignored for now — only the text prompt is
1346// forwarded — because the queued-prompt path is text-only; a
1347// follow-up can expand the queue entry to carry images.
1348func (i *Interactive) SubmitOrQueue(text string, images []provider.ImageBlock) {
1349	_ = images // reserved for future queued-with-images support
1350	i.mu.Lock()
1351	if i.agent == nil {
1352		i.statusErr = "not logged in. type /login first."
1353		i.mu.Unlock()
1354		i.invalidate()
1355		return
1356	}
1357	if i.busy {
1358		i.queued = append(i.queued, text)
1359		i.mu.Unlock()
1360		i.invalidate()
1361		return
1362	}
1363	i.mu.Unlock()
1364	i.startTurn(i.runCtx, text)
1365}
1366
1367// CancelTurn aborts the active turn if one is running. Used by the
1368// telegram bridge when the paired user sends /stop.
1369func (i *Interactive) CancelTurn() {
1370	i.mu.Lock()
1371	cancel := i.cancelTurn
1372	i.mu.Unlock()
1373	if cancel != nil {
1374		cancel()
1375	}
1376}
1377
1378// Insert places text at the cursor in the editor.
1379func (i *Interactive) Insert(text string) {
1380	i.ed.Insert(text)
1381	i.invalidate()
1382}
1383
1384// Display appends a styled note from extName to the chat without a
1385// model call.
1386func (i *Interactive) Display(extName, text string) {
1387	i.appendExtensionNote(extName, text, "info")
1388	i.invalidate()
1389}
1390
1391func (i *Interactive) runSlash(ctx context.Context, cmd string) (done bool) {
1392	parts := strings.Fields(cmd)
1393	switch parts[0] {
1394	case "/exit":
1395		return true
1396	case "/clear":
1397		if i.agent != nil {
1398			i.agent.SetMessages(nil)
1399		}
1400		i.mu.Lock()
1401		i.toolCalls = map[string]*tui.ToolCallView{}
1402		i.toolOrder = nil
1403		i.statusErr = ""
1404		i.statusOK = ""
1405		i.helpBlock = nil
1406		i.parkedTurn = 0
1407		i.parkedTotal = 0
1408		i.scrollOffset = 0
1409		i.extNotes = nil
1410		i.view.InvalidateRenderCache()
1411		i.mu.Unlock()
1412	case "/help":
1413		i.mu.Lock()
1414		i.helpBlock = renderHelpBlock(i.cfg.Theme, i.lastCols())
1415		i.statusErr = ""
1416		i.statusOK = ""
1417		// Pin the viewport to the newest content so the help block,
1418		// which we just appended to the end of the transcript, is
1419		// what the user actually sees.
1420		i.scrollOffset = 0
1421		i.mu.Unlock()
1422	case "/login":
1423		i.dialog.Open()
1424	case "/logout":
1425		if len(parts) >= 2 {
1426			// Explicit target: /logout anthropic | openai | all
1427			i.doLogout(parts[1])
1428			break
1429		}
1430		// No arg: open the picker over whichever providers are
1431		// currently logged in. If nothing's logged in, bail with a
1432		// status line.
1433		i.openLogoutDialog()
1434	case "/model":
1435		if len(parts) >= 2 {
1436			i.applyModelSelection("", parts[1])
1437		} else {
1438			i.modelDialog.Open(i.cfg.Model)
1439		}
1440	case "/sessions":
1441		i.sessionDialog.Open(i.cfg.ZotHome, i.cfg.CWD)
1442	case "/jump":
1443		i.openJumpDialog(parts[1:])
1444	case "/btw":
1445		i.openBtwDialog(parts[1:])
1446	case "/skills":
1447		i.openSkillsDialog()
1448	case "/compact":
1449		i.runCompact(ctx, false)
1450	case "/study":
1451		// Canned prompt that tells the agent to read every file
1452		// in the current directory so its later turns have the
1453		// whole project in context. Dispatched through the normal
1454		// queue-or-start path so it behaves identically to
1455		// typing the prompt by hand.
1456		const studyPrompt = "Read and understand everything in the current directory."
1457		i.mu.Lock()
1458		if i.busy {
1459			i.queued = append(i.queued, studyPrompt)
1460			i.mu.Unlock()
1461			i.invalidate()
1462			break
1463		}
1464		i.mu.Unlock()
1465		i.startTurn(ctx, studyPrompt)
1466	case "/jail":
1467		if i.cfg.Sandbox == nil {
1468			i.mu.Lock()
1469			i.statusErr = "sandbox not available in this build"
1470			i.mu.Unlock()
1471			break
1472		}
1473		i.cfg.Sandbox.Lock()
1474		i.mu.Lock()
1475		i.statusOK = "jailed to " + i.cfg.CWD + " (tools cannot touch paths outside this directory)"
1476		i.statusErr = ""
1477		i.mu.Unlock()
1478	case "/unjail":
1479		if i.cfg.Sandbox == nil {
1480			i.mu.Lock()
1481			i.statusErr = "sandbox not available in this build"
1482			i.mu.Unlock()
1483			break
1484		}
1485		i.cfg.Sandbox.Unlock()
1486		i.mu.Lock()
1487		i.statusOK = "unjailed"
1488		i.statusErr = ""
1489		i.mu.Unlock()
1490	case "/reload-ext":
1491		i.runReloadExt(ctx)
1492	case "/yolo":
1493		i.runYoloOn()
1494	case "/telegram", "/tg":
1495		if len(parts) >= 2 {
1496			i.doTelegram(parts[1])
1497			break
1498		}
1499		i.openTelegramDialog()
1500	case "/session":
1501		if len(parts) >= 2 {
1502			action := parts[1]
1503			arg := ""
1504			if len(parts) >= 3 {
1505				arg = strings.Join(parts[2:], " ")
1506			}
1507			i.doSessionOp(action, arg)
1508			break
1509		}
1510		i.openSessionOpsDialog()
1511	default:
1512		// Last-resort fallback: try the extension manager. Built-in
1513		// cases above always win; this branch only fires for slash
1514		// commands the extension manager registered. Same routing as
1515		// the editor's submit-handler dispatch path so the autocomplete
1516		// "enter on highlighted suggestion" flow also works.
1517		extName := strings.TrimPrefix(parts[0], "/")
1518		if i.cfg.Extensions != nil && i.cfg.Extensions.HasCommand(extName) {
1519			rest := ""
1520			if len(parts) > 1 {
1521				rest = strings.Join(parts[1:], " ")
1522			}
1523			go i.invokeExtensionCommand(ctx, extName, rest)
1524			return false
1525		}
1526		i.mu.Lock()
1527		i.statusErr = "unknown command: " + parts[0]
1528		i.mu.Unlock()
1529	}
1530	return false
1531}
1532
1533// openLogoutDialog shows the provider picker for `/logout` with no
1534// argument. Only providers the user is currently logged into are
1535// listed, plus an "all" entry when more than one is present. If
1536// nothing's logged in, writes a status line instead of opening an
1537// empty dialog.
1538func (i *Interactive) openLogoutDialog() {
1539	if i.cfg.AuthManager == nil {
1540		i.mu.Lock()
1541		i.statusErr = "no auth manager configured"
1542		i.mu.Unlock()
1543		i.invalidate()
1544		return
1545	}
1546	store := i.cfg.AuthManager.Store()
1547	if store == nil {
1548		i.mu.Lock()
1549		i.statusErr = "auth store is not available"
1550		i.mu.Unlock()
1551		i.invalidate()
1552		return
1553	}
1554	creds, err := store.Load()
1555	if err != nil {
1556		i.mu.Lock()
1557		i.statusErr = "read auth store: " + err.Error()
1558		i.mu.Unlock()
1559		i.invalidate()
1560		return
1561	}
1562
1563	var items []logoutItem
1564	for _, p := range []string{"anthropic", "openai"} {
1565		if creds.Has(p) {
1566			items = append(items, logoutItem{
1567				label:  p,
1568				target: p,
1569				method: creds.Method(p),
1570			})
1571		}
1572	}
1573	if len(items) == 0 {
1574		i.mu.Lock()
1575		i.statusOK = "no credentials stored; already logged out"
1576		i.statusErr = ""
1577		i.mu.Unlock()
1578		i.invalidate()
1579		return
1580	}
1581	if len(items) > 1 {
1582		items = append(items, logoutItem{label: "all", target: "all"})
1583	}
1584
1585	i.logoutDialog.Open(items)
1586	i.invalidate()
1587}
1588
1589// doLogout clears credentials for the given provider (or all providers)
1590// from auth.json. If the active agent was using those credentials, it
1591// is torn down so the user is forced through /login before their next
1592// prompt.
1593//
1594// target: "anthropic" | "openai" | "all"
1595func (i *Interactive) doLogout(target string) {
1596	if i.cfg.AuthManager == nil {
1597		i.mu.Lock()
1598		i.statusErr = "no auth manager configured"
1599		i.mu.Unlock()
1600		return
1601	}
1602	store := i.cfg.AuthManager.Store()
1603	if store == nil {
1604		i.mu.Lock()
1605		i.statusErr = "auth store is not available"
1606		i.mu.Unlock()
1607		return
1608	}
1609
1610	var providers []string
1611	switch target {
1612	case "", "all":
1613		providers = []string{"anthropic", "openai"}
1614	case "anthropic", "openai":
1615		providers = []string{target}
1616	default:
1617		i.mu.Lock()
1618		i.statusErr = "unknown provider: " + target + " (use anthropic, openai, or all)"
1619		i.mu.Unlock()
1620		return
1621	}
1622
1623	var errs []string
1624	clearedCurrent := false
1625	for _, p := range providers {
1626		if err := store.Clear(p); err != nil {
1627			errs = append(errs, p+": "+err.Error())
1628			continue
1629		}
1630		if p == i.cfg.Provider {
1631			clearedCurrent = true
1632		}
1633	}
1634
1635	i.mu.Lock()
1636	defer i.mu.Unlock()
1637	if len(errs) > 0 {
1638		i.statusErr = "logout errors: " + strings.Join(errs, "; ")
1639		return
1640	}
1641	i.statusErr = ""
1642	if clearedCurrent {
1643		// The running agent was using a credential we just wiped. Drop
1644		// it so prompts can't go out with the stale client, and hint at
1645		// /login.
1646		i.agent = nil
1647		i.statusOK = "logged out of " + strings.Join(providers, ", ") + ". type /login to sign back in."
1648	} else {
1649		i.statusOK = "logged out of " + strings.Join(providers, ", ")
1650	}
1651}
1652
1653func (i *Interactive) startAPIKeyFlow(provider string) {
1654	url, err := i.cfg.AuthManager.StartAPIKey(provider)
1655	if err != nil {
1656		i.dialog.ShowResult(false, err.Error())
1657		return
1658	}
1659	i.dialog.ShowWaiting(url)
1660}
1661
1662func (i *Interactive) startOAuthFlow(provider string) {
1663	url, err := i.cfg.AuthManager.StartOAuth(provider)
1664	if err != nil {
1665		i.dialog.ShowResult(false, err.Error())
1666		return
1667	}
1668	i.dialog.ShowWaiting(url)
1669}
1670
1671// applyModelSelection switches the active model (and provider, if the
1672// new model belongs to a different one). It rebuilds the underlying
1673// client when needed so the provider wire-protocol matches.
1674// cancelAndWaitForIdle cancels the active turn (if any) and blocks
1675// briefly until the turn goroutine has updated i.busy = false. Used
1676// before destructive slash commands so transcript-mutating work
1677// (/clear, /compact, /logout, /login completion, cross-provider
1678// /model swap) doesn't race with the still-running stream.
1679//
1680// The wait is bounded; if the turn doesn't release within the timeout
1681// we proceed anyway. Worst case is a brief overlap that the agent's
1682// own mutex protects against.
1683func (i *Interactive) cancelAndWaitForIdle() {
1684	i.mu.Lock()
1685	busy := i.busy
1686	cancel := i.cancelTurn
1687	i.mu.Unlock()
1688	if !busy {
1689		return
1690	}
1691	if cancel != nil {
1692		cancel()
1693	}
1694	deadline := time.Now().Add(2 * time.Second)
1695	for time.Now().Before(deadline) {
1696		i.mu.Lock()
1697		done := !i.busy
1698		i.mu.Unlock()
1699		if done {
1700			return
1701		}
1702		time.Sleep(10 * time.Millisecond)
1703	}
1704}
1705
1706// openBtwDialog opens the side-chat overlay with a frozen snapshot
1707// of the current main session. The optional argument is auto-
1708// submitted as the first question, so '/btw does X work?' fires the
1709// model call immediately instead of just opening an empty dialog.
1710func (i *Interactive) openBtwDialog(args []string) {
1711	if i.agent == nil {
1712		i.mu.Lock()
1713		i.statusErr = "not logged in. type /login first."
1714		i.mu.Unlock()
1715		return
1716	}
1717	seed := strings.TrimSpace(strings.Join(args, " "))
1718	i.btwDialog.Open(i.cfg.Theme, i.agent, i.agent.System, i.cfg.Model, seed)
1719	i.invalidate()
1720}
1721
1722// openSkillsDialog opens the skill inspector. The picker reflects
1723// whatever SkillSnapshot returns at call time, so edits to a
1724// SKILL.md made during a session show up on the next /skills.
1725func (i *Interactive) openSkillsDialog() {
1726	var list []*skills.Skill
1727	if i.cfg.SkillSnapshot != nil {
1728		list = i.cfg.SkillSnapshot()
1729	}
1730	i.skillsDialog.Open(list)
1731	i.invalidate()
1732}
1733
1734// openJumpDialog builds a /jump picker from the current transcript.
1735// If the user typed "/jump foo" with a filter and it matches exactly
1736// one turn, jump there directly without showing the dialog.
1737func (i *Interactive) openJumpDialog(args []string) {
1738	if i.view == nil || len(i.view.Messages) == 0 {
1739		i.mu.Lock()
1740		i.statusErr = "nothing to jump to \u2014 the session is empty"
1741		i.mu.Unlock()
1742		return
1743	}
1744	filter := strings.TrimSpace(strings.Join(args, " "))
1745	i.jumpDialog.Open(i.view.Messages, filter)
1746	// Shortcut: with a filter argument that matches exactly one turn,
1747	// jump immediately and skip the picker.
1748	if filter != "" {
1749		if tgts := i.jumpDialog.Targets(); len(tgts) == 1 {
1750			t := tgts[0]
1751			i.jumpDialog.Close()
1752			i.applyJumpSelection(t.MessageIdx, t.TurnNo)
1753		}
1754	}
1755}
1756
1757// applyJumpSelection scrolls the chat viewport so the user message at
1758// msgIdx is visible at (or near) the top of the chat area. Uses the
1759// anchor slice returned by view.BuildWithAnchors so the mapping from
1760// message index to row is exact, regardless of variable-height tool
1761// blocks above the target.
1762func (i *Interactive) applyJumpSelection(msgIdx, turnNo int) {
1763	cols := i.lastCols()
1764	chat, anchors := i.view.BuildWithAnchors(cols)
1765	var row int
1766	found := false
1767	for _, a := range anchors {
1768		if a.MessageIdx == msgIdx {
1769			row = a.Row
1770			found = true
1771			break
1772		}
1773	}
1774	if !found {
1775		i.mu.Lock()
1776		i.statusErr = "could not resolve jump target"
1777		i.mu.Unlock()
1778		return
1779	}
1780
1781	chatLen := len(chat)
1782	page := i.chatPage()
1783	if page < 1 {
1784		page = 1
1785	}
1786	// scrollOffset is measured from the bottom of the chat slice, so
1787	// to place `row` at the top of the viewport we want:
1788	//     chatLen - scrollOffset - page == row
1789	// Solve for scrollOffset and clamp to [0, chatLen-page].
1790	offset := chatLen - (row + page)
1791	if offset < 0 {
1792		offset = 0
1793	}
1794	maxOffset := chatLen - page
1795	if maxOffset < 0 {
1796		maxOffset = 0
1797	}
1798	if offset > maxOffset {
1799		offset = maxOffset
1800	}
1801
1802	i.mu.Lock()
1803	i.scrollOffset = offset
1804	i.parkedTurn = turnNo
1805	i.parkedTotal = totalTurnsLocked(i.view.Messages)
1806	i.statusOK = fmt.Sprintf("jumped to turn %d", turnNo)
1807	i.statusErr = ""
1808	i.mu.Unlock()
1809}
1810
1811// totalTurnsLocked counts user messages in the transcript. Caller is
1812// assumed to hold i.mu (the name is a mild reminder; this function
1813// itself doesn't touch shared state beyond the slice it's handed).
1814func totalTurnsLocked(msgs []provider.Message) int {
1815	n := 0
1816	for _, m := range msgs {
1817		if m.Role == provider.RoleUser {
1818			n++
1819		}
1820	}
1821	return n
1822}
1823
1824// applySessionSelection loads the given session via the cli-provided
1825// callback and parks the viewport on the last turn so the user lands
1826// looking at where the conversation left off (their last prompt at the
1827// top of the chat, the assistant's last reply right below). Older
1828// history is one scroll up; pgdn or end snaps to the current tail.
1829//
1830// Without this, scrollOffset stayed at 0 (pinned to the live tail),
1831// which on a long resumed session showed only the last few rows of
1832// the final assistant message — the user read that as "only one liner
1833// happened, the resume didn't work".
1834func (i *Interactive) applySessionSelection(path string) {
1835	if i.cfg.LoadSession == nil {
1836		i.mu.Lock()
1837		i.statusErr = "session loading is not wired in this build"
1838		i.mu.Unlock()
1839		return
1840	}
1841	if err := i.cfg.LoadSession(path); err != nil {
1842		i.mu.Lock()
1843		i.statusErr = err.Error()
1844		i.mu.Unlock()
1845		return
1846	}
1847
1848	i.mu.Lock()
1849	i.statusOK = "resumed session: " + path
1850	i.statusErr = ""
1851	i.parkedTurn = 0
1852	i.parkedTotal = 0
1853	i.view.InvalidateRenderCache()
1854	// Pull the freshly-loaded transcript into the view so the anchor
1855	// math below sees the post-resume messages, not the empty pre-load
1856	// state. redraw() does the same on its next pass; we just front-run
1857	// it here to compute the scroll target.
1858	if i.agent != nil {
1859		i.view.Messages = i.agent.Messages()
1860	}
1861	msgs := i.view.Messages
1862	i.mu.Unlock()
1863
1864	i.scrollToLastTurn(msgs)
1865}
1866
1867// scrollToLastTurn parks the viewport at the most recent user turn,
1868// or at the top if the transcript has no user messages. Used after
1869// resume so the user lands looking at where they left off.
1870func (i *Interactive) scrollToLastTurn(msgs []provider.Message) {
1871	if len(msgs) == 0 {
1872		i.mu.Lock()
1873		i.scrollOffset = 0
1874		i.mu.Unlock()
1875		return
1876	}
1877	// Find the last user message index.
1878	lastUser := -1
1879	turnNo, totalTurns := 0, 0
1880	for idx, m := range msgs {
1881		if m.Role == provider.RoleUser {
1882			totalTurns++
1883			lastUser = idx
1884		}
1885	}
1886	if lastUser < 0 {
1887		i.mu.Lock()
1888		i.scrollOffset = 0
1889		i.mu.Unlock()
1890		return
1891	}
1892	turnNo = totalTurns
1893
1894	cols := i.lastCols()
1895	chat, anchors := i.view.BuildWithAnchors(cols)
1896	var row int
1897	found := false
1898	for _, a := range anchors {
1899		if a.MessageIdx == lastUser {
1900			row = a.Row
1901			found = true
1902			break
1903		}
1904	}
1905	if !found {
1906		i.mu.Lock()
1907		i.scrollOffset = 0
1908		i.mu.Unlock()
1909		return
1910	}
1911
1912	chatLen := len(chat)
1913	page := i.chatPage()
1914	if page < 1 {
1915		page = 1
1916	}
1917	offset := chatLen - (row + page)
1918	if offset < 0 {
1919		offset = 0
1920	}
1921	maxOffset := chatLen - page
1922	if maxOffset < 0 {
1923		maxOffset = 0
1924	}
1925	if offset > maxOffset {
1926		offset = maxOffset
1927	}
1928
1929	i.mu.Lock()
1930	i.scrollOffset = offset
1931	// Mark the parked-turn footer so the user sees "viewing turn N of
1932	// M · pgdn to catch up" — same affordance as /jump. Tells them at
1933	// a glance that they're looking at history, not the live tail.
1934	if offset > 0 {
1935		i.parkedTurn = turnNo
1936		i.parkedTotal = totalTurns
1937	}
1938	i.mu.Unlock()
1939	i.invalidate()
1940}
1941
1942func (i *Interactive) applyModelSelection(prov, model string) {
1943	if model == "" {
1944		return
1945	}
1946	m, err := provider.FindModel(prov, model)
1947	if err != nil {
1948		i.mu.Lock()
1949		i.statusErr = err.Error()
1950		i.mu.Unlock()
1951		return
1952	}
1953	// Same provider? Just swap the model on the existing agent.
1954	if i.agent != nil && m.Provider == i.cfg.Provider {
1955		i.mu.Lock()
1956		i.cfg.Model = m.ID
1957		i.agent.Model = m.ID
1958		i.statusOK = "model: " + m.ID
1959		i.statusErr = ""
1960		i.mu.Unlock()
1961		if i.cfg.PersistModel != nil {
1962			i.cfg.PersistModel(i.cfg.Provider, m.ID)
1963		}
1964		return
1965	}
1966	// Different provider: rebuild agent (needs credentials for target provider).
1967	if i.cfg.BuildAgentFor == nil {
1968		i.mu.Lock()
1969		i.statusErr = "cannot switch provider: no builder configured"
1970		i.mu.Unlock()
1971		return
1972	}
1973	// Snapshot the current transcript and cumulative usage BEFORE we
1974	// build the replacement agent so we can hand them off. Without
1975	// this the user perceives the entire session as wiped on a
1976	// cross-provider /model swap.
1977	var carryMsgs []provider.Message
1978	var carryCost provider.Usage
1979	if i.agent != nil {
1980		carryMsgs = i.agent.Messages()
1981		carryCost = i.agent.Cost()
1982	}
1983
1984	ag, p, md, err := i.cfg.BuildAgentFor(m.Provider, m.ID)
1985	if err != nil {
1986		i.mu.Lock()
1987		i.statusErr = err.Error()
1988		i.mu.Unlock()
1989		return
1990	}
1991
1992	// Replay the transcript and seed the cost on the freshly-built
1993	// agent. Messages travel cleanly between providers because they
1994	// use the same provider.Message shape; tool-call ids are local
1995	// to a turn so cross-provider continuation never confuses the
1996	// new model (it just sees the assistant's reply, no orphan
1997	// tool_use blocks because /model swaps are gated to idle state).
1998	if len(carryMsgs) > 0 {
1999		ag.SetMessages(carryMsgs)
2000	}
2001	ag.SeedCost(carryCost)
2002
2003	i.mu.Lock()
2004	i.agent = ag
2005	i.cfg.Provider = p
2006	i.cfg.Model = md
2007	i.statusOK = "switched to " + p + " / " + md
2008	i.statusErr = ""
2009	// Render cache keys are width+content based, so the new agent's
2010	// identical messages will reuse the existing entries. Nothing
2011	// to invalidate.
2012	i.mu.Unlock()
2013	if i.cfg.PersistModel != nil {
2014		i.cfg.PersistModel(p, md)
2015	}
2016}
2017
2018func (i *Interactive) handleAuthEvent(ev auth.Event) {
2019	switch ev.Kind {
2020	case "started":
2021		i.dialog.ShowWaiting(ev.URL)
2022	case "browser_open":
2023		// no-op
2024	case "error":
2025		i.dialog.ShowResult(false, ev.Message)
2026	case "success":
2027		// Rebuild the agent with the fresh credential.
2028		ag, prov, model, err := i.cfg.BuildAgent()
2029		if err != nil {
2030			i.dialog.ShowResult(false, err.Error())
2031			return
2032		}
2033		i.mu.Lock()
2034		i.agent = ag
2035		i.cfg.Provider = prov
2036		i.cfg.Model = model
2037		i.statusErr = ""
2038		i.statusOK = "logged in to " + ev.Provider + " via " + ev.Method
2039		i.mu.Unlock()
2040		i.dialog.ShowResult(true, "")
2041	}
2042}
2043
2044// runCompact invokes core.Agent.Compact and reflects the progress in
2045// the tui. It runs in a goroutine so the ui stays responsive; esc/ctrl+c
2046// cancel via the same cancelTurn channel used for normal turns.
2047//
2048// When auto is true the spinner message is pinned to "condensing
2049// history" and the status bar surfaces "(auto)" next to the context
2050// percentage so it's obvious the system triggered this, not the user.
2051func (i *Interactive) runCompact(parent context.Context, auto bool) {
2052	if i.agent == nil {
2053		i.mu.Lock()
2054		i.statusErr = "not logged in. type /login first."
2055		i.mu.Unlock()
2056		return
2057	}
2058	ctx, cancel := context.WithCancel(parent)
2059	i.mu.Lock()
2060	i.busy = true
2061	if auto {
2062		i.spin.StartFixed("condensing history")
2063		i.autoCompacting = true
2064		i.statusOK = "condensing history… (esc to cancel)"
2065	} else {
2066		i.spin.Start()
2067		i.statusOK = "compacting..."
2068	}
2069	i.cancelTurn = cancel
2070	i.statusErr = ""
2071	i.streaming.Reset()
2072	i.streamOn = true
2073	i.scrollOffset = 0
2074	i.helpBlock = nil
2075	i.mu.Unlock()
2076	i.invalidate()
2077
2078	go func() {
2079		sink := func(delta string) {
2080			i.mu.Lock()
2081			i.streaming.WriteString(delta)
2082			i.mu.Unlock()
2083			i.invalidate()
2084		}
2085		summary, err := i.agent.Compact(ctx, 4, sink)
2086		i.mu.Lock()
2087		i.busy = false
2088		i.resetStreamingStateLocked()
2089		i.cancelTurn = nil
2090		i.autoCompacting = false
2091		switch {
2092		case err != nil && ctx.Err() != nil:
2093			i.statusErr = ""
2094			if auto {
2095				i.statusOK = "auto-condense cancelled"
2096			} else {
2097				i.statusOK = "compaction cancelled"
2098			}
2099		case err != nil:
2100			i.statusErr = "compaction failed: " + err.Error()
2101			i.statusOK = ""
2102		default:
2103			i.statusErr = ""
2104			i.statusOK = fmt.Sprintf("compacted transcript (%d chars of summary)", len(summary))
2105			i.lastCtxInput = 0 // reset; next turn will get a fresh measurement
2106			i.toolCalls = map[string]*tui.ToolCallView{}
2107			i.toolOrder = nil
2108			// Transcript was rewritten in place — purge the per-message
2109			// render cache so stale entries keyed on the old messages
2110			// don't linger.
2111			i.view.InvalidateRenderCache()
2112		}
2113		i.mu.Unlock()
2114		i.invalidate()
2115	}()
2116}
2117
2118func (i *Interactive) startTurn(parent context.Context, prompt string) {
2119	if i.agent == nil {
2120		return
2121	}
2122	ctx, cancel := context.WithCancel(parent)
2123	i.mu.Lock()
2124	i.busy = true
2125	i.spin.Start()
2126	i.cancelTurn = cancel
2127	i.statusErr = ""
2128	i.statusOK = ""
2129	i.streaming.Reset()
2130	i.streamOn = true
2131	i.toolCalls = map[string]*tui.ToolCallView{}
2132	i.toolOrder = nil
2133	i.scrollOffset = 0 // jump back to the bottom on new turn
2134	i.parkedTurn = 0   // starting a turn clears the /jump parked state
2135	i.parkedTotal = 0
2136	i.helpBlock = nil // hide the help block once the user asks something
2137	i.mu.Unlock()
2138	i.invalidate()
2139
2140	sink := func(ev core.AgentEvent) {
2141		i.handleEvent(ev)
2142		i.invalidate()
2143	}
2144
2145	go func() {
2146		err := i.agent.Prompt(ctx, prompt, nil, sink)
2147		i.mu.Lock()
2148		i.busy = false
2149		// Don't touch streamPending / streamFlushPending here — the
2150		// pacer may still be draining the final deltas and needs to
2151		// paint them even though Prompt has returned. It will reset
2152		// streamOn on its own once the buffer empties.
2153		if len(i.streamPending) == 0 {
2154			i.streamOn = false
2155		}
2156		i.cancelTurn = nil
2157		if err != nil && ctx.Err() == nil {
2158			i.statusErr = err.Error()
2159		}
2160		// Persist the assistant's reply (and every tool row before
2161		// it) to the session file while the turn memory is hot.
2162		// Without this, WriteNewTranscript only fires at zot exit,
2163		// meaning a crash or ungraceful kill drops the whole
2164		// conversation. FlushSession is idempotent (it advances the
2165		// baseline so subsequent flushes only write new rows).
2166		flush := i.cfg.FlushSession
2167		i.mu.Unlock()
2168		if flush != nil {
2169			flush()
2170		}
2171		i.mu.Lock()
2172		// Pop the next queued message, if any, and relaunch.
2173		var next string
2174		var hasNext bool
2175		if len(i.queued) > 0 && ctx.Err() == nil && err == nil {
2176			next, i.queued = i.queued[0], i.queued[1:]
2177			hasNext = true
2178		}
2179		// If the turn was cancelled or errored, drop the queue so the
2180		// user isn't bombarded with stale messages after an interrupt.
2181		if ctx.Err() != nil || err != nil {
2182			i.queued = nil
2183		}
2184		// Decide whether the next thing to do is an auto-compaction.
2185		// Only fires when the turn completed cleanly AND the queue is
2186		// empty (otherwise a queued message would race the condense).
2187		shouldAutoCompact := !hasNext && err == nil && ctx.Err() == nil && i.shouldAutoCompactLocked()
2188		i.mu.Unlock()
2189		i.invalidate()
2190		parent := i.runCtx
2191		if parent == nil {
2192			parent = context.Background()
2193		}
2194		switch {
2195		case hasNext:
2196			i.startTurn(parent, next)
2197		case shouldAutoCompact:
2198			i.runCompact(parent, true)
2199		}
2200	}()
2201}
2202
2203// autoCompactThreshold is the context-window fraction at which the
2204// agent will auto-compact after a turn ends. 0.85 leaves enough
2205// headroom for one more user prompt + response before we bump the
2206// hard limit.
2207const autoCompactThreshold = 0.85
2208
2209// shouldAutoCompactLocked reports whether the last turn pushed context
2210// usage past the auto-compact threshold. Must be called with i.mu
2211// held; it reads lastCtxInput and the current model's context window.
2212func (i *Interactive) shouldAutoCompactLocked() bool {
2213	if i.agent == nil {
2214		return false
2215	}
2216	if i.autoCompacting {
2217		return false
2218	}
2219	m, err := provider.FindModel(i.cfg.Provider, i.cfg.Model)
2220	if err != nil || m.ContextWindow <= 0 {
2221		return false
2222	}
2223	if i.lastCtxInput <= 0 {
2224		return false
2225	}
2226	return float64(i.lastCtxInput)/float64(m.ContextWindow) >= autoCompactThreshold
2227}
2228
2229func (i *Interactive) handleEvent(ev core.AgentEvent) {
2230	i.mu.Lock()
2231	defer i.mu.Unlock()
2232	switch e := ev.(type) {
2233	case core.EvAssistantStart:
2234		// Fires at the top of every oneTurn, including follow-up
2235		// turns after tool use. Without this, the streaming buffer
2236		// is still marked off from the previous assistant message
2237		// and the final summary text pops in all at once instead
2238		// of typewriter-streaming delta by delta.
2239		i.streaming.Reset()
2240		i.streamPending = i.streamPending[:0]
2241		i.streamFlushPending = false
2242		i.streamOn = true
2243		// Clear the live tool-call overlay. Any tools from the
2244		// previous round are now fully folded into the transcript
2245		// (assistant tool_use block + tool role message with the
2246		// result), so keeping them in the overlay would duplicate
2247		// them in the view — once inside the finalised transcript
2248		// and once below the streaming block, with the streaming
2249		// summary sandwiched in between. The next EvToolUseStart
2250		// will populate fresh entries for this turn's tools.
2251		i.toolCalls = map[string]*tui.ToolCallView{}
2252		i.toolOrder = nil
2253	case core.EvTextDelta:
2254		// Buffer into streamPending; the paintPace ticker drains
2255		// it into i.streaming a few runes at a time for a smooth
2256		// typewriter effect independent of upstream chunk size.
2257		i.streamPending = append(i.streamPending, []rune(e.Delta)...)
2258		i.streamOn = true
2259	case core.EvAssistantMessage:
2260		// OnAssistant + telegram mirroring always fire on message
2261		// arrival — they read the FINAL message content, which is
2262		// complete regardless of what's still in the pacer.
2263		i.assistantMessageSideEffects(e.Message)
2264		// If the pacer still has characters to drain, keep streamOn
2265		// true and mark flush pending; the paintPace ticker will
2266		// drain the remainder and reset streaming state when done.
2267		// Otherwise (rare: full-replay sessions, abort paths) clear
2268		// synchronously so a later render doesn't show stale text.
2269		if len(i.streamPending) > 0 {
2270			i.streamFlushPending = true
2271			return
2272		}
2273		i.resetStreamingStateLocked()
2274	case core.EvToolUseStart:
2275		// Live streaming: pre-create the view so the user sees the
2276		// tool call being composed in real time. Any subsequent
2277		// EvToolCall for the same ID updates the same struct (the
2278		// final parsed args + name are already known here).
2279		if _, exists := i.toolCalls[e.ID]; !exists {
2280			i.toolCalls[e.ID] = &tui.ToolCallView{
2281				ID:        e.ID,
2282				Name:      e.Name,
2283				Streaming: true,
2284			}
2285			i.toolOrder = append(i.toolOrder, e.ID)
2286		}
2287	case core.EvToolUseArgs:
2288		if tc, ok := i.toolCalls[e.ID]; ok {
2289			tc.RawJSONBuf += e.Delta
2290			// Refresh the live path as soon as it parses; used in
2291			// the header (▸ write /Users/pat/Desktop/demo.ts)
2292			// while the content is still streaming.
2293			if p, pok, _ := tui.ExtractPartialStringField(tc.RawJSONBuf, "path"); pok {
2294				tc.LivePath = p
2295			} else if p, pok, _ := tui.ExtractPartialStringField(tc.RawJSONBuf, "file_path"); pok {
2296				tc.LivePath = p
2297			}
2298		}
2299	case core.EvToolUseEnd:
2300		if tc, ok := i.toolCalls[e.ID]; ok {
2301			tc.Streaming = false
2302		}
2303	case core.EvToolCall:
2304		// If we already pre-created the view during streaming, just
2305		// refresh the final Args summary. Otherwise create a new one
2306		// (non-streaming providers or legacy paths).
2307		if tc, ok := i.toolCalls[e.ID]; ok {
2308			tc.Args = tui.ShortArgs(e.Name, e.Args)
2309			tc.Streaming = false
2310		} else {
2311			i.toolCalls[e.ID] = &tui.ToolCallView{
2312				ID:   e.ID,
2313				Name: e.Name,
2314				Args: tui.ShortArgs(e.Name, e.Args),
2315			}
2316			i.toolOrder = append(i.toolOrder, e.ID)
2317		}
2318	case core.EvToolResult:
2319		if tc, ok := i.toolCalls[e.ID]; ok {
2320			tc.Done = true
2321			tc.Error = e.Result.IsError
2322			var text strings.Builder
2323			for _, c := range e.Result.Content {
2324				if tb, ok := c.(provider.TextBlock); ok {
2325					if text.Len() > 0 {
2326						text.WriteString("\n")
2327					}
2328					text.WriteString(tb.Text)
2329				}
2330			}
2331			tc.Result = text.String()
2332		}
2333		if i.cfg.OnToolResult != nil {
2334			i.cfg.OnToolResult(e.ID, e.Result)
2335		}
2336	case core.EvUsage:
2337		i.cumUsage = e.Cumulative
2338		if e.Usage.InputTokens > 0 {
2339			i.lastCtxInput = e.Usage.InputTokens + e.Usage.CacheReadTokens + e.Usage.CacheWriteTokens
2340		}
2341	case core.EvTurnEnd:
2342		if e.Stop == provider.StopAborted {
2343			// Aborted turn: discard the partial streaming text (it
2344			// is not persisted in the transcript) and clear any
2345			// transient error. Also drop anything still buffered in
2346			// the pacer so nothing keeps drawing after the cancel.
2347			i.resetStreamingStateLocked()
2348			i.statusErr = ""
2349			i.statusOK = "cancelled"
2350			return
2351		}
2352		if e.Err != nil && !strings.Contains(e.Err.Error(), "context canceled") {
2353			i.statusErr = e.Err.Error()
2354		}
2355	}
2356}
2357
2358// Agent returns the current agent, if any. Used by cli.go to flush the
2359// final transcript to the session file.
2360func (i *Interactive) Agent() *core.Agent {
2361	i.mu.Lock()
2362	defer i.mu.Unlock()
2363	return i.agent
2364}
2365
2366// silence unused import in some build configs
2367var _ = fmt.Sprintf
2368
2369// runReloadExt triggers a live reload of every extension (discovered
2370// + explicit). Runs on a goroutine so the TUI stays responsive; the
2371// Manager.Reload takes a couple of hundred ms to shut down subprocs
2372// and respawn them. Shows a status line throughout.
2373func (i *Interactive) runReloadExt(ctx context.Context) {
2374	if i.cfg.Extensions == nil {
2375		i.mu.Lock()
2376		i.statusErr = "no extension manager in this build"
2377		i.mu.Unlock()
2378		i.invalidate()
2379		return
2380	}
2381	i.mu.Lock()
2382	i.statusOK = "reloading extensions…"
2383	i.statusErr = ""
2384	i.mu.Unlock()
2385	i.invalidate()
2386
2387	go func() {
2388		stats := i.cfg.Extensions.Reload(ctx, 2*time.Second)
2389		msg := fmt.Sprintf("reloaded: %d stopped, %d loaded (%d ready)", stats.Stopped, stats.Loaded, stats.Ready)
2390		if len(stats.Errors) > 0 {
2391			msg += fmt.Sprintf(", %d error(s)", len(stats.Errors))
2392		}
2393		i.mu.Lock()
2394		i.statusOK = msg
2395		i.statusErr = ""
2396		i.mu.Unlock()
2397		i.invalidate()
2398	}()
2399}
2400
2401// Confirm implements core.Confirmer. The agent goroutine calls
2402// this synchronously before every tool invocation when --no-yolo is
2403// active. We push the request onto the confirmDialog queue, trigger
2404// a redraw, and block the caller until the user answers.
2405//
2406// If the session is cancelled or the TUI exits mid-prompt, any
2407// pending request is refused via CancelAll so the agent doesn't
2408// deadlock.
2409func (i *Interactive) Confirm(toolName string, preview string) core.ConfirmDecision {
2410	resp := make(chan core.ConfirmDecision, 1)
2411	i.confirmDialog.Enqueue(&confirmRequest{
2412		toolName: toolName,
2413		preview:  preview,
2414		resp:     resp,
2415	})
2416	i.invalidate()
2417	return <-resp
2418}
2419
2420// runYoloOn disables --no-yolo for the rest of the session. Tool
2421// calls run without prompting after this; there's intentionally no
2422// way to re-enable gating mid-session, if the user wants that back
2423// they can exit and restart with --no-yolo.
2424func (i *Interactive) runYoloOn() {
2425	if i.cfg.ConfirmGate == nil {
2426		i.mu.Lock()
2427		i.statusOK = "yolo mode is already on (no --no-yolo in this session)"
2428		i.statusErr = ""
2429		i.mu.Unlock()
2430		i.invalidate()
2431		return
2432	}
2433	i.cfg.ConfirmGate.AllowAll()
2434	// Also auto-allow any currently pending confirmation so the
2435	// agent doesn't deadlock if /yolo is typed while a prompt is
2436	// open.
2437	i.confirmDialog.AllowAllPending()
2438	i.mu.Lock()
2439	i.statusOK = "yolo engaged: no more tool-call confirmations this session"
2440	i.statusErr = ""
2441	i.mu.Unlock()
2442	i.invalidate()
2443}
2444
2445// openTelegramDialog shows the picker for `/telegram` with no arg.
2446// Items depend on current state: disconnect + status when running,
2447// connect + status when stopped.
2448func (i *Interactive) openTelegramDialog() {
2449	items := i.telegramMenuItems()
2450	if len(items) == 0 {
2451		i.mu.Lock()
2452		i.statusErr = "telegram not configured. run `zot telegram-bot setup` first."
2453		i.mu.Unlock()
2454		i.invalidate()
2455		return
2456	}
2457	i.telegramDialog.Open(items)
2458	i.invalidate()
2459}
2460
2461// telegramMenuItems builds the dialog entries for the current
2462// bridge state. Returns empty when no bot.json exists so the
2463// caller can show a helpful status line instead of an empty menu.
2464func (i *Interactive) telegramMenuItems() []telegramItem {
2465	cfg, err := telegram.LoadConfig(i.cfg.ZotHome)
2466	if err != nil || cfg.BotToken == "" {
2467		return nil
2468	}
2469	var items []telegramItem
2470	if i.telegramBridge != nil && i.telegramBridge.Active() {
2471		items = append(items, telegramItem{label: "disconnect", action: "disconnect", hint: "stop mirroring"})
2472		st := i.telegramBridge.State()
2473		hint := "active"
2474		if st.Username != "" {
2475			hint += " as @" + st.Username
2476		}
2477		items = append(items, telegramItem{label: "status", action: "status", hint: hint})
2478	} else {
2479		label := "connect"
2480		hint := "start mirroring dms into this session"
2481		if cfg.AllowedUserID == 0 {
2482			hint = "awaiting pairing (send /start to the bot once connected)"
2483		}
2484		items = append(items, telegramItem{label: label, action: "connect", hint: hint})
2485		items = append(items, telegramItem{label: "status", action: "status", hint: "disconnected"})
2486	}
2487	return items
2488}
2489
2490// doTelegram dispatches one of the three explicit actions. Called
2491// from /telegram <action> or after the picker selects a row.
2492func (i *Interactive) doTelegram(action string) {
2493	switch action {
2494	case "connect":
2495		i.telegramConnect()
2496	case "disconnect":
2497		i.telegramDisconnect()
2498	case "status":
2499		i.telegramStatus()
2500	default:
2501		i.mu.Lock()
2502		i.statusErr = "unknown telegram action: " + action + " (use connect, disconnect, or status)"
2503		i.mu.Unlock()
2504		i.invalidate()
2505	}
2506}
2507
2508// telegramConnect starts the bridge. Refuses if it's already
2509// running or if the on-disk bot.json is missing a token.
2510func (i *Interactive) telegramConnect() {
2511	if i.telegramBridge != nil && i.telegramBridge.Active() {
2512		i.mu.Lock()
2513		i.statusOK = "telegram already connected"
2514		i.statusErr = ""
2515		i.mu.Unlock()
2516		i.invalidate()
2517		return
2518	}
2519	cfg, err := telegram.LoadConfig(i.cfg.ZotHome)
2520	if err != nil {
2521		i.mu.Lock()
2522		i.statusErr = "telegram: " + err.Error()
2523		i.mu.Unlock()
2524		i.invalidate()
2525		return
2526	}
2527	if cfg.BotToken == "" {
2528		i.mu.Lock()
2529		i.statusErr = "telegram: no bot token configured. run `zot telegram-bot setup` first."
2530		i.mu.Unlock()
2531		i.invalidate()
2532		return
2533	}
2534	// Refuse to start when a background daemon is already polling
2535	// the same bot. Two concurrent long-poll consumers race each
2536	// update and one always loses, so DMs get half-delivered. The
2537	// user can `zot telegram-bot stop` first, then /telegram connect.
2538	if pid, alive, _ := telegram.IsRunning(i.cfg.ZotHome); alive && pid > 0 {
2539		i.mu.Lock()
2540		i.statusErr = fmt.Sprintf("telegram: bot daemon already running (pid %d). stop it with `zot telegram-bot stop` first.", pid)
2541		i.mu.Unlock()
2542		i.invalidate()
2543		return
2544	}
2545	i.telegramBridge = &telegram.Bridge{
2546		Client: telegram.NewClient(cfg.BotToken),
2547		Config: cfg,
2548		Save: func(next telegram.Config) error {
2549			return telegram.SaveConfig(i.cfg.ZotHome, next)
2550		},
2551		Host: &telegramHost{iv: i},
2552	}
2553	if err := i.telegramBridge.Start(i.runCtx); err != nil {
2554		i.telegramBridge = nil
2555		i.mu.Lock()
2556		i.statusErr = "telegram connect failed: " + err.Error()
2557		i.mu.Unlock()
2558		i.invalidate()
2559		return
2560	}
2561	state := i.telegramBridge.State()
2562	label := "telegram connected"
2563	if state.Username != "" {
2564		label += " as @" + state.Username
2565	}
2566	if state.PairedID == 0 {
2567		label += " — send /start to the bot from your phone to claim it"
2568	}
2569	i.mu.Lock()
2570	i.statusOK = label
2571	i.statusErr = ""
2572	i.mu.Unlock()
2573	i.invalidate()
2574}
2575
2576// telegramDisconnect stops the bridge. No-op when already stopped.
2577func (i *Interactive) telegramDisconnect() {
2578	if i.telegramBridge == nil || !i.telegramBridge.Active() {
2579		i.mu.Lock()
2580		i.statusOK = "telegram already disconnected"
2581		i.statusErr = ""
2582		i.mu.Unlock()
2583		i.invalidate()
2584		return
2585	}
2586	i.telegramBridge.Stop()
2587	i.mu.Lock()
2588	i.statusOK = "telegram disconnected"
2589	i.statusErr = ""
2590	i.mu.Unlock()
2591	i.invalidate()
2592}
2593
2594// telegramStatus writes a one-liner describing the bridge state.
2595// Reports on both the in-tui bridge and the background daemon so
2596// the user isn't confused when the daemon owns the poll loop.
2597func (i *Interactive) telegramStatus() {
2598	var msg string
2599	if i.telegramBridge != nil && i.telegramBridge.Active() {
2600		s := i.telegramBridge.State()
2601		msg = "telegram: connected (tui bridge)"
2602		if s.Username != "" {
2603			msg += " as @" + s.Username
2604		}
2605		if s.PairedID != 0 {
2606			msg += fmt.Sprintf(" · paired with user %d", s.PairedID)
2607		} else {
2608			msg += " · awaiting pairing"
2609		}
2610	} else if pid, alive, _ := telegram.IsRunning(i.cfg.ZotHome); alive && pid > 0 {
2611		msg = fmt.Sprintf("telegram: background daemon running (pid %d) · /telegram connect won't work until you stop it", pid)
2612	} else {
2613		cfg, _ := telegram.LoadConfig(i.cfg.ZotHome)
2614		if cfg.BotToken == "" {
2615			msg = "telegram: not configured. run `zot telegram-bot setup` first."
2616		} else {
2617			msg = "telegram: disconnected"
2618			if cfg.BotUsername != "" {
2619				msg += " (@" + cfg.BotUsername + " ready to connect)"
2620			}
2621		}
2622	}
2623	i.mu.Lock()
2624	i.statusOK = msg
2625	i.statusErr = ""
2626	i.mu.Unlock()
2627	i.invalidate()
2628}
2629
2630// telegramHost adapts *Interactive to telegram.Host so the bridge
2631// can call back into the TUI without importing modes directly.
2632type telegramHost struct{ iv *Interactive }
2633
2634func (h *telegramHost) SubmitOrQueue(prompt string, images []provider.ImageBlock) {
2635	h.iv.SubmitOrQueue(prompt, images)
2636}
2637
2638func (h *telegramHost) CancelTurn() { h.iv.CancelTurn() }
2639
2640func (h *telegramHost) Notify(level, message string) {
2641	h.iv.mu.Lock()
2642	switch level {
2643	case "error", "warn":
2644		h.iv.statusErr = message
2645		h.iv.statusOK = ""
2646	default:
2647		h.iv.statusOK = message
2648		h.iv.statusErr = ""
2649	}
2650	h.iv.mu.Unlock()
2651	h.iv.invalidate()
2652}
2653
2654// openSessionOpsDialog shows the picker for `/session` with no arg.
2655// Always offers export, import, fork, tree; the handlers bail with
2656// a clear status message when the precondition isn't met (empty
2657// transcript on fork; no parent/siblings on tree).
2658func (i *Interactive) openSessionOpsDialog() {
2659	items := []sessionOpsItem{
2660		{label: "export", action: "export", hint: "write the current session to a .zotsession file"},
2661		{label: "import", action: "import", hint: "load a .zotsession file into this directory"},
2662		{label: "fork", action: "fork", hint: "branch from a past user message into a new session"},
2663		{label: "tree", action: "tree", hint: "switch between branches in this directory"},
2664	}
2665	i.sessionOpsDialog.Open(items)
2666	i.invalidate()
2667}
2668
2669// doSessionOp dispatches export, import, fork, or tree. arg is the
2670// optional positional argument from e.g. /session export <path>
2671// or /session import <path>; fork and tree ignore it.
2672func (i *Interactive) doSessionOp(action, arg string) {
2673	switch action {
2674	case "export":
2675		i.doSessionExport(arg)
2676	case "import":
2677		i.doSessionImport(arg)
2678	case "fork":
2679		i.doSessionFork()
2680	case "tree":
2681		i.doSessionTree()
2682	default:
2683		i.mu.Lock()
2684		i.statusErr = "unknown /session action: " + action + " (use export, import, fork, or tree)"
2685		i.mu.Unlock()
2686		i.invalidate()
2687	}
2688}
2689
2690// doSessionExport writes the live session file to destination path
2691// dst. When dst is empty we default to ~/Downloads (falling back to
2692// the user's home directory if it doesn't exist). The helper
2693// expands a leading `~` and creates any missing parent directories.
2694func (i *Interactive) doSessionExport(dst string) {
2695	if i.cfg.CurrentSessionPath == nil {
2696		i.mu.Lock()
2697		i.statusErr = "export: no session is active (running with --no-session?)"
2698		i.mu.Unlock()
2699		i.invalidate()
2700		return
2701	}
2702	src := i.cfg.CurrentSessionPath()
2703	if src == "" {
2704		i.mu.Lock()
2705		i.statusErr = "export: no session is active (running with --no-session?)"
2706		i.mu.Unlock()
2707		i.invalidate()
2708		return
2709	}
2710	// Persist any in-memory agent messages to the session file so
2711	// the export carries the full conversation. Without this, the
2712	// default lazy-flush-at-exit strategy leaves most of a running
2713	// session unwritten and the export ends up with only the meta.
2714	if i.cfg.FlushSession != nil {
2715		i.cfg.FlushSession()
2716	}
2717	dst = unquotePath(dst)
2718	if dst == "" {
2719		dst = defaultExportDir()
2720	} else {
2721		dst = expandTilde(dst)
2722	}
2723	out, err := core.ExportSession(src, dst)
2724	if err != nil {
2725		i.mu.Lock()
2726		i.statusErr = "export: " + err.Error()
2727		i.mu.Unlock()
2728		i.invalidate()
2729		return
2730	}
2731	i.mu.Lock()
2732	i.statusOK = "exported session to " + friendlyPath(out)
2733	i.statusErr = ""
2734	i.mu.Unlock()
2735	i.invalidate()
2736}
2737
2738// doSessionImport copies the .zotsession file at src into the
2739// running cwd's sessions directory and loads it as the active
2740// session, same as `/sessions` -> pick. When src is empty we ask
2741// the user to pass a path (no usable default here).
2742func (i *Interactive) doSessionImport(src string) {
2743	src = unquotePath(src)
2744	if src == "" {
2745		i.mu.Lock()
2746		i.statusErr = "import: pass a path — e.g. /session import ~/Downloads/work.zotsession"
2747		i.mu.Unlock()
2748		i.invalidate()
2749		return
2750	}
2751	src = expandTilde(src)
2752	if _, err := os.Stat(src); err != nil {
2753		i.mu.Lock()
2754		i.statusErr = "import: " + err.Error()
2755		i.mu.Unlock()
2756		i.invalidate()
2757		return
2758	}
2759	newPath, err := core.ImportSession(src, i.cfg.ZotHome, i.cfg.CWD, i.cfg.Version)
2760	if err != nil {
2761		i.mu.Lock()
2762		i.statusErr = "import: " + err.Error()
2763		i.mu.Unlock()
2764		i.invalidate()
2765		return
2766	}
2767	if i.cfg.LoadSession == nil {
2768		i.mu.Lock()
2769		i.statusOK = "imported session at " + friendlyPath(newPath) + " (run /sessions to resume it)"
2770		i.statusErr = ""
2771		i.mu.Unlock()
2772		i.invalidate()
2773		return
2774	}
2775	if err := i.cfg.LoadSession(newPath); err != nil {
2776		i.mu.Lock()
2777		i.statusErr = "import: load failed: " + err.Error()
2778		i.mu.Unlock()
2779		i.invalidate()
2780		return
2781	}
2782	i.mu.Lock()
2783	i.statusOK = "imported and switched to session " + friendlyPath(newPath)
2784	i.statusErr = ""
2785	i.mu.Unlock()
2786	i.invalidate()
2787}
2788
2789// defaultExportDir returns ~/Downloads when it exists, or ~ as a
2790// fallback, or /tmp on exotic machines with no home dir.
2791func defaultExportDir() string {
2792	home, err := os.UserHomeDir()
2793	if err != nil || home == "" {
2794		return os.TempDir()
2795	}
2796	downloads := filepath.Join(home, "Downloads")
2797	if fi, err := os.Stat(downloads); err == nil && fi.IsDir() {
2798		return downloads
2799	}
2800	return home
2801}
2802
2803// expandTilde turns a leading ~ into the user's home directory.
2804// Returns the input unchanged when there's no tilde or no home.
2805func expandTilde(p string) string {
2806	if p == "" || p[0] != '~' {
2807		return p
2808	}
2809	home, err := os.UserHomeDir()
2810	if err != nil || home == "" {
2811		return p
2812	}
2813	if len(p) == 1 {
2814		return home
2815	}
2816	if p[1] == '/' || p[1] == filepath.Separator {
2817		return filepath.Join(home, p[2:])
2818	}
2819	return p
2820}
2821
2822// unquotePath strips a matching pair of surrounding single or
2823// double quotes. Drag-drop paste in the tui auto-quotes dropped
2824// file paths so the shell-like `/session import 'foo bar.zs'`
2825// stays well-formed; when the TUI's own slash handler consumes
2826// the arg, we want the raw path back.
2827func unquotePath(p string) string {
2828	p = strings.TrimSpace(p)
2829	if len(p) >= 2 {
2830		first := p[0]
2831		last := p[len(p)-1]
2832		if (first == '\'' && last == '\'') || (first == '"' && last == '"') {
2833			p = p[1 : len(p)-1]
2834		}
2835	}
2836	return p
2837}
2838
2839// friendlyPath collapses the user's home directory to a leading ~
2840// so status messages read cleanly. Falls back to the raw path when
2841// the home dir is unknown.
2842func friendlyPath(p string) string {
2843	home, err := os.UserHomeDir()
2844	if err != nil || home == "" {
2845		return p
2846	}
2847	if strings.HasPrefix(p, home+string(filepath.Separator)) {
2848		return "~" + p[len(home):]
2849	}
2850	return p
2851}
2852
2853// doSessionFork opens the /jump turn picker in "fork mode". The
2854// next selection branches the current session at that user turn
2855// instead of scrolling the viewport to it.
2856func (i *Interactive) doSessionFork() {
2857	if i.cfg.CurrentSessionPath == nil || i.cfg.CurrentSessionPath() == "" {
2858		i.mu.Lock()
2859		i.statusErr = "fork: no session is active (running with --no-session?)"
2860		i.mu.Unlock()
2861		i.invalidate()
2862		return
2863	}
2864	msgs := []provider.Message{}
2865	if i.agent != nil {
2866		msgs = i.agent.Messages()
2867	}
2868	if len(msgs) == 0 {
2869		i.mu.Lock()
2870		i.statusErr = "fork: transcript is empty; nothing to fork from"
2871		i.mu.Unlock()
2872		i.invalidate()
2873		return
2874	}
2875	i.pendingFork = true
2876	i.jumpDialog.Open(msgs, "")
2877	i.invalidate()
2878}
2879
2880// doSessionTree shows the branch topology picker for this cwd.
2881// Pick an entry to switch into it (same semantics as /sessions
2882// picking a past session, but with the parent/child indentation).
2883func (i *Interactive) doSessionTree() {
2884	if i.cfg.ZotHome == "" || i.cfg.CWD == "" {
2885		i.mu.Lock()
2886		i.statusErr = "tree: session storage not configured"
2887		i.mu.Unlock()
2888		i.invalidate()
2889		return
2890	}
2891	// Flush the running agent's transcript first so its message
2892	// count + latest preview are accurate in the tree.
2893	if i.cfg.FlushSession != nil {
2894		i.cfg.FlushSession()
2895	}
2896	roots := core.BuildSessionTree(i.cfg.ZotHome, i.cfg.CWD)
2897	if len(roots) == 0 {
2898		i.mu.Lock()
2899		i.statusErr = "tree: no sessions in this directory yet"
2900		i.mu.Unlock()
2901		i.invalidate()
2902		return
2903	}
2904	current := ""
2905	if i.cfg.CurrentSessionPath != nil {
2906		current = i.cfg.CurrentSessionPath()
2907	}
2908	if !i.sessionTreeDialog.Open(roots, current) {
2909		i.mu.Lock()
2910		i.statusErr = "tree: no branches to show"
2911		i.mu.Unlock()
2912	}
2913	i.invalidate()
2914}
2915
2916// applySessionTreeSelection switches the running agent to the
2917// session file at path. Thin wrapper around LoadSession that also
2918// writes a status line.
2919func (i *Interactive) applySessionTreeSelection(path string) {
2920	if i.cfg.LoadSession == nil {
2921		i.mu.Lock()
2922		i.statusErr = "tree: session swap not available in this build"
2923		i.mu.Unlock()
2924		i.invalidate()
2925		return
2926	}
2927	if err := i.cfg.LoadSession(path); err != nil {
2928		i.mu.Lock()
2929		i.statusErr = "tree: load failed: " + err.Error()
2930		i.mu.Unlock()
2931		i.invalidate()
2932		return
2933	}
2934	i.mu.Lock()
2935	i.statusOK = "switched to branch " + friendlyPath(path)
2936	i.statusErr = ""
2937	i.mu.Unlock()
2938	i.invalidate()
2939}
2940
2941// applyForkSelection branches the current session at msgIdx+1 (so
2942// the selected user message and everything before it is included
2943// in the new branch), then switches the running agent to the new
2944// file. Called from the jump-dialog handler when pendingFork=true.
2945func (i *Interactive) applyForkSelection(msgIdx int) {
2946	i.pendingFork = false
2947	if i.cfg.CurrentSessionPath == nil {
2948		i.mu.Lock()
2949		i.statusErr = "fork: no session is active"
2950		i.mu.Unlock()
2951		i.invalidate()
2952		return
2953	}
2954	src := i.cfg.CurrentSessionPath()
2955	if src == "" {
2956		i.mu.Lock()
2957		i.statusErr = "fork: no session is active"
2958		i.mu.Unlock()
2959		i.invalidate()
2960		return
2961	}
2962	if i.cfg.FlushSession != nil {
2963		i.cfg.FlushSession()
2964	}
2965	// msgIdx is 0-indexed message position; copy msgIdx+1 rows so
2966	// the selected user message is included.
2967	upTo := msgIdx + 1
2968	newPath, err := core.BranchSession(src, i.cfg.ZotHome, i.cfg.CWD, i.cfg.Version, upTo)
2969	if err != nil {
2970		i.mu.Lock()
2971		i.statusErr = "fork: " + err.Error()
2972		i.mu.Unlock()
2973		i.invalidate()
2974		return
2975	}
2976	if i.cfg.LoadSession == nil {
2977		i.mu.Lock()
2978		i.statusOK = "forked at message " + formatInt(upTo) + " (run /sessions to resume)"
2979		i.statusErr = ""
2980		i.mu.Unlock()
2981		i.invalidate()
2982		return
2983	}
2984	if err := i.cfg.LoadSession(newPath); err != nil {
2985		i.mu.Lock()
2986		i.statusErr = "fork: switch failed: " + err.Error()
2987		i.mu.Unlock()
2988		i.invalidate()
2989		return
2990	}
2991	i.mu.Lock()
2992	i.statusOK = "forked and switched to new branch at " + friendlyPath(newPath)
2993	i.statusErr = ""
2994	i.mu.Unlock()
2995	i.invalidate()
2996}
2997
2998// formatInt is a tiny strconv.Itoa shim; keeps the handler above
2999// from needing a strconv import just for one call.
3000func formatInt(n int) string {
3001	return fmt.Sprintf("%d", n)
3002}
3003
3004// assistantText returns the concatenated text of every TextBlock in
3005// m. Used by the streaming-view dedupe guard to tell when a live
3006// streamed reply has already been promoted into the transcript.
3007func assistantText(m provider.Message) string {
3008	var sb strings.Builder
3009	for _, c := range m.Content {
3010		if tb, ok := c.(provider.TextBlock); ok {
3011			if sb.Len() > 0 {
3012				sb.WriteByte('\n')
3013			}
3014			sb.WriteString(tb.Text)
3015		}
3016	}
3017	return sb.String()
3018}
3019
3020// resetStreamingStateLocked clears every piece of streaming state
3021// in one shot. Used by abort paths (turn cancel, compact finish,
3022// queue drain) so the pacer doesn't keep draining stale runes from
3023// a prior turn. Must be called with i.mu held.
3024func (i *Interactive) resetStreamingStateLocked() {
3025	i.streaming.Reset()
3026	i.streamPending = i.streamPending[:0]
3027	i.streamFlushPending = false
3028	i.streamOn = false
3029}
3030
3031// assistantMessageSideEffects runs the non-visual hooks attached to
3032// EvAssistantMessage: the host-provided OnAssistant callback and the
3033// telegram-bridge mirror. Called with i.mu held.
3034//
3035// Factored out of handleEvent because the streaming pacer may defer
3036// visual reset until after the last buffered rune has painted, but
3037// the callbacks themselves must fire on message arrival so
3038// downstream observers (session persistence, telegram, cost panels)
3039// don't wait on a UI animation to catch up.
3040func (i *Interactive) assistantMessageSideEffects(m provider.Message) {
3041	if i.cfg.OnAssistant != nil {
3042		i.cfg.OnAssistant(m)
3043	}
3044	if i.telegramBridge != nil && i.telegramBridge.Active() {
3045		var sb strings.Builder
3046		for _, c := range m.Content {
3047			if tb, ok := c.(provider.TextBlock); ok {
3048				if sb.Len() > 0 {
3049					sb.WriteString("\n")
3050				}
3051				sb.WriteString(tb.Text)
3052			}
3053		}
3054		if text := sb.String(); strings.TrimSpace(text) != "" {
3055			go i.telegramBridge.OnAssistantText(text)
3056		}
3057	}
3058}
3059
3060// paintPaceRate is how many runes the streaming pacer releases per
3061// tick. With a 16ms tick, 6 runes/tick is ~375 runes/s — fast enough
3062// that a 500-rune summary finishes in ~1.3s, slow enough to look
3063// like a human typing. Empirically matches the feel of provider
3064// paths that already drip-stream natively.
3065const paintPaceRate = 6
3066
3067// paintPaceInterval is the tick interval for the streaming pacer.
3068// 16ms lines up with the redraw throttle so we never paint faster
3069// than the terminal can keep up.
3070const paintPaceInterval = 16 * time.Millisecond
3071
3072// runStreamPacer drains buffered deltas from streamPending into
3073// streaming a small batch per tick, invalidating after each move.
3074// It stops when the context cancels (tui shutdown).
3075//
3076// Why a pacer: providers differ wildly in how they chunk their
3077// text_delta events. The API-key path on Anthropic emits ~30 drips
3078// for a 400-token summary; the OAuth path can coalesce the same
3079// summary into 3 fat chunks, visually indistinguishable from "the
3080// whole reply just appeared". The pacer normalizes that so every
3081// path looks the same on screen.
3082func (i *Interactive) runStreamPacer(ctx context.Context) {
3083	t := time.NewTicker(paintPaceInterval)
3084	defer t.Stop()
3085	for {
3086		select {
3087		case <-ctx.Done():
3088			return
3089		case <-t.C:
3090			i.mu.Lock()
3091			if len(i.streamPending) == 0 {
3092				// EvAssistantMessage already fired but the pacer
3093				// was still draining a tick ago. Everything is now
3094				// painted; clear the streaming flags so the next
3095				// redraw shows the finalised transcript message
3096				// and hides the streaming overlay.
3097				if i.streamFlushPending {
3098					i.streamFlushPending = false
3099					i.streaming.Reset()
3100					i.streamOn = false
3101					i.mu.Unlock()
3102					i.invalidate()
3103					continue
3104				}
3105				i.mu.Unlock()
3106				continue
3107			}
3108			n := paintPaceRate
3109			if n > len(i.streamPending) {
3110				n = len(i.streamPending)
3111			}
3112			i.streaming.WriteString(string(i.streamPending[:n]))
3113			i.streamPending = i.streamPending[n:]
3114			i.mu.Unlock()
3115			i.invalidate()
3116		}
3117	}
3118}