tools.go

   1package chat
   2
   3import (
   4	"encoding/json"
   5	"fmt"
   6	"path/filepath"
   7	"strings"
   8	"time"
   9
  10	tea "charm.land/bubbletea/v2"
  11	"charm.land/lipgloss/v2"
  12	"charm.land/lipgloss/v2/tree"
  13	"github.com/charmbracelet/crush/internal/agent"
  14	"github.com/charmbracelet/crush/internal/agent/tools"
  15	"github.com/charmbracelet/crush/internal/diff"
  16	"github.com/charmbracelet/crush/internal/fsext"
  17	"github.com/charmbracelet/crush/internal/hooks"
  18	"github.com/charmbracelet/crush/internal/message"
  19	"github.com/charmbracelet/crush/internal/stringext"
  20	"github.com/charmbracelet/crush/internal/ui/anim"
  21	"github.com/charmbracelet/crush/internal/ui/common"
  22	"github.com/charmbracelet/crush/internal/ui/list"
  23	"github.com/charmbracelet/crush/internal/ui/styles"
  24	"github.com/charmbracelet/x/ansi"
  25)
  26
  27// responseContextHeight limits the number of lines displayed in tool output.
  28const responseContextHeight = 10
  29
  30// toolBodyLeftPaddingTotal represents the padding that should be applied to each tool body
  31const toolBodyLeftPaddingTotal = 2
  32
  33// ToolStatus represents the current state of a tool call.
  34type ToolStatus int
  35
  36const (
  37	ToolStatusAwaitingPermission ToolStatus = iota
  38	ToolStatusRunning
  39	ToolStatusSuccess
  40	ToolStatusError
  41	ToolStatusCanceled
  42)
  43
  44// ToolMessageItem represents a tool call message in the chat UI.
  45type ToolMessageItem interface {
  46	MessageItem
  47
  48	ToolCall() message.ToolCall
  49	SetToolCall(tc message.ToolCall)
  50	SetResult(res *message.ToolResult)
  51	MessageID() string
  52	SetMessageID(id string)
  53	SetStatus(status ToolStatus)
  54	Status() ToolStatus
  55}
  56
  57// Compactable is an interface for tool items that can render in a compacted mode.
  58// When compact mode is enabled, tools render as a compact single-line header.
  59type Compactable interface {
  60	SetCompact(compact bool)
  61}
  62
  63// SpinningState contains the state passed to SpinningFunc for custom spinning logic.
  64type SpinningState struct {
  65	ToolCall message.ToolCall
  66	Result   *message.ToolResult
  67	Status   ToolStatus
  68}
  69
  70// IsCanceled returns true if the tool status is canceled.
  71func (s *SpinningState) IsCanceled() bool {
  72	return s.Status == ToolStatusCanceled
  73}
  74
  75// HasResult returns true if the result is not nil.
  76func (s *SpinningState) HasResult() bool {
  77	return s.Result != nil
  78}
  79
  80// SpinningFunc is a function type for custom spinning logic.
  81// Returns true if the tool should show the spinning animation.
  82type SpinningFunc func(state SpinningState) bool
  83
  84// DefaultToolRenderContext implements the default [ToolRenderer] interface.
  85type DefaultToolRenderContext struct{}
  86
  87// RenderTool implements the [ToolRenderer] interface.
  88func (d *DefaultToolRenderContext) RenderTool(sty *styles.Styles, width int, opts *ToolRenderOpts) string {
  89	return "TODO: Implement Tool Renderer For: " + opts.ToolCall.Name
  90}
  91
  92// ToolRenderOpts contains the data needed to render a tool call.
  93type ToolRenderOpts struct {
  94	ToolCall        message.ToolCall
  95	Result          *message.ToolResult
  96	Anim            *anim.Anim
  97	ExpandedContent bool
  98	Compact         bool
  99	IsSpinning      bool
 100	Status          ToolStatus
 101}
 102
 103// IsPending returns true if the tool call is still pending (not finished and
 104// not canceled).
 105func (o *ToolRenderOpts) IsPending() bool {
 106	return !o.ToolCall.Finished && !o.IsCanceled()
 107}
 108
 109// IsCanceled returns true if the tool status is canceled.
 110func (o *ToolRenderOpts) IsCanceled() bool {
 111	return o.Status == ToolStatusCanceled
 112}
 113
 114// HasResult returns true if the result is not nil.
 115func (o *ToolRenderOpts) HasResult() bool {
 116	return o.Result != nil
 117}
 118
 119// HasEmptyResult returns true if the result is nil or has empty content.
 120func (o *ToolRenderOpts) HasEmptyResult() bool {
 121	return o.Result == nil || o.Result.Content == ""
 122}
 123
 124// ToolRenderer represents an interface for rendering tool calls.
 125type ToolRenderer interface {
 126	RenderTool(sty *styles.Styles, width int, opts *ToolRenderOpts) string
 127}
 128
 129// ToolRendererFunc is a function type that implements the [ToolRenderer] interface.
 130type ToolRendererFunc func(sty *styles.Styles, width int, opts *ToolRenderOpts) string
 131
 132// RenderTool implements the ToolRenderer interface.
 133func (f ToolRendererFunc) RenderTool(sty *styles.Styles, width int, opts *ToolRenderOpts) string {
 134	return f(sty, width, opts)
 135}
 136
 137// baseToolMessageItem represents a tool call message that can be displayed in the UI.
 138type baseToolMessageItem struct {
 139	*list.Versioned
 140	*highlightableMessageItem
 141	*cachedMessageItem
 142	*focusableMessageItem
 143
 144	toolRenderer ToolRenderer
 145	toolCall     message.ToolCall
 146	result       *message.ToolResult
 147	messageID    string
 148	status       ToolStatus
 149	// we use this so we can efficiently cache
 150	// tools that have a capped width (e.x bash.. and others)
 151	hasCappedWidth bool
 152	// isCompact indicates this tool should render in compact mode.
 153	isCompact bool
 154	// spinningFunc allows tools to override the default spinning logic.
 155	// If nil, uses the default: !toolCall.Finished && !canceled.
 156	spinningFunc SpinningFunc
 157
 158	sty             *styles.Styles
 159	anim            *anim.Anim
 160	expandedContent bool
 161}
 162
 163var _ Expandable = (*baseToolMessageItem)(nil)
 164
 165// newBaseToolMessageItem is the internal constructor for base tool message items.
 166func newBaseToolMessageItem(
 167	sty *styles.Styles,
 168	toolCall message.ToolCall,
 169	result *message.ToolResult,
 170	toolRenderer ToolRenderer,
 171	canceled bool,
 172) *baseToolMessageItem {
 173	// we only do full width for diffs (as far as I know)
 174	hasCappedWidth := toolCall.Name != tools.EditToolName && toolCall.Name != tools.MultiEditToolName
 175
 176	status := ToolStatusRunning
 177	if canceled {
 178		status = ToolStatusCanceled
 179	}
 180
 181	v := list.NewVersioned()
 182	t := &baseToolMessageItem{
 183		Versioned:                v,
 184		highlightableMessageItem: defaultHighlighter(sty, v),
 185		cachedMessageItem:        &cachedMessageItem{},
 186		focusableMessageItem:     newFocusableMessageItem(v),
 187		sty:                      sty,
 188		toolRenderer:             toolRenderer,
 189		toolCall:                 toolCall,
 190		result:                   result,
 191		status:                   status,
 192		hasCappedWidth:           hasCappedWidth,
 193	}
 194	t.anim = anim.New(anim.Settings{
 195		ID:          toolCall.ID,
 196		Size:        15,
 197		GradColorA:  sty.WorkingGradFromColor,
 198		GradColorB:  sty.WorkingGradToColor,
 199		LabelColor:  sty.WorkingLabelColor,
 200		CycleColors: true,
 201	})
 202
 203	return t
 204}
 205
 206// NewToolMessageItem creates a new [ToolMessageItem] based on the tool call name.
 207//
 208// It returns a specific tool message item type if implemented, otherwise it
 209// returns a generic tool message item. The messageID is the ID of the assistant
 210// message containing this tool call.
 211func NewToolMessageItem(
 212	sty *styles.Styles,
 213	messageID string,
 214	toolCall message.ToolCall,
 215	result *message.ToolResult,
 216	canceled bool,
 217) ToolMessageItem {
 218	var item ToolMessageItem
 219	switch toolCall.Name {
 220	case tools.BashToolName:
 221		item = NewBashToolMessageItem(sty, toolCall, result, canceled)
 222	case tools.JobOutputToolName:
 223		item = NewJobOutputToolMessageItem(sty, toolCall, result, canceled)
 224	case tools.JobKillToolName:
 225		item = NewJobKillToolMessageItem(sty, toolCall, result, canceled)
 226	case tools.ViewToolName:
 227		item = NewViewToolMessageItem(sty, toolCall, result, canceled)
 228	case tools.WriteToolName:
 229		item = NewWriteToolMessageItem(sty, toolCall, result, canceled)
 230	case tools.EditToolName:
 231		item = NewEditToolMessageItem(sty, toolCall, result, canceled)
 232	case tools.MultiEditToolName:
 233		item = NewMultiEditToolMessageItem(sty, toolCall, result, canceled)
 234	case tools.GlobToolName:
 235		item = NewGlobToolMessageItem(sty, toolCall, result, canceled)
 236	case tools.GrepToolName:
 237		item = NewGrepToolMessageItem(sty, toolCall, result, canceled)
 238	case tools.LSToolName:
 239		item = NewLSToolMessageItem(sty, toolCall, result, canceled)
 240	case tools.DownloadToolName:
 241		item = NewDownloadToolMessageItem(sty, toolCall, result, canceled)
 242	case tools.FetchToolName:
 243		item = NewFetchToolMessageItem(sty, toolCall, result, canceled)
 244	case tools.SourcegraphToolName:
 245		item = NewSourcegraphToolMessageItem(sty, toolCall, result, canceled)
 246	case tools.DiagnosticsToolName:
 247		item = NewDiagnosticsToolMessageItem(sty, toolCall, result, canceled)
 248	case agent.AgentToolName:
 249		item = NewAgentToolMessageItem(sty, toolCall, result, canceled)
 250	case tools.AgenticFetchToolName:
 251		item = NewAgenticFetchToolMessageItem(sty, toolCall, result, canceled)
 252	case tools.WebFetchToolName:
 253		item = NewWebFetchToolMessageItem(sty, toolCall, result, canceled)
 254	case tools.WebSearchToolName:
 255		item = NewWebSearchToolMessageItem(sty, toolCall, result, canceled)
 256	case tools.TodosToolName:
 257		item = NewTodosToolMessageItem(sty, toolCall, result, canceled)
 258	case tools.ReferencesToolName:
 259		item = NewReferencesToolMessageItem(sty, toolCall, result, canceled)
 260	case tools.LSPRestartToolName:
 261		item = NewLSPRestartToolMessageItem(sty, toolCall, result, canceled)
 262	default:
 263		if IsDockerMCPTool(toolCall.Name) {
 264			item = NewDockerMCPToolMessageItem(sty, toolCall, result, canceled)
 265		} else if strings.HasPrefix(toolCall.Name, "mcp_") {
 266			item = NewMCPToolMessageItem(sty, toolCall, result, canceled)
 267		} else {
 268			item = NewGenericToolMessageItem(sty, toolCall, result, canceled)
 269		}
 270	}
 271	item.SetMessageID(messageID)
 272	return item
 273}
 274
 275// SetCompact implements the Compactable interface.
 276func (t *baseToolMessageItem) SetCompact(compact bool) {
 277	if t.isCompact == compact {
 278		return
 279	}
 280	t.isCompact = compact
 281	t.clearCache()
 282	t.Bump()
 283}
 284
 285// ID returns the unique identifier for this tool message item.
 286func (t *baseToolMessageItem) ID() string {
 287	return t.toolCall.ID
 288}
 289
 290// StartAnimation starts the assistant message animation if it should be spinning.
 291func (t *baseToolMessageItem) StartAnimation() tea.Cmd {
 292	if !t.isSpinning() {
 293		return nil
 294	}
 295	return t.anim.Start()
 296}
 297
 298// Animate progresses the assistant message animation if it should be spinning.
 299//
 300// Bumps the F6 list-cache version so the next draw re-renders this
 301// item: a spinner tick mutates anim's internal frame counter, which
 302// changes the rendered output but is invisible to the per-item
 303// caches. Without the bump the list cache would serve the previously
 304// rendered frame indefinitely and the spinner would appear frozen.
 305// The ID gate keeps unrelated ticks (routed here by a future change
 306// to chat.Animate's dispatch) from churning the cache.
 307func (t *baseToolMessageItem) Animate(msg anim.StepMsg) tea.Cmd {
 308	if !t.isSpinning() {
 309		return nil
 310	}
 311	if msg.ID != t.toolCall.ID {
 312		return nil
 313	}
 314	t.Bump()
 315	return t.anim.Animate(msg)
 316}
 317
 318// RawRender implements [MessageItem].
 319func (t *baseToolMessageItem) RawRender(width int) string {
 320	toolItemWidth := width - MessageLeftPaddingTotal
 321	if t.hasCappedWidth {
 322		toolItemWidth = cappedMessageWidth(width)
 323	}
 324
 325	content, height, ok := t.getCachedRender(toolItemWidth)
 326	// if we are spinning or there is no cache rerender
 327	if !ok || t.isSpinning() {
 328		content = t.toolRenderer.RenderTool(t.sty, toolItemWidth, &ToolRenderOpts{
 329			ToolCall:        t.toolCall,
 330			Result:          t.result,
 331			Anim:            t.anim,
 332			ExpandedContent: t.expandedContent,
 333			Compact:         t.isCompact,
 334			IsSpinning:      t.isSpinning(),
 335			Status:          t.computeStatus(),
 336		})
 337
 338		// Prepend hook indicator if hooks ran for this tool call.
 339		if t.result != nil {
 340			if hookLine := toolOutputHookIndicator(t.sty, t.result.Metadata, toolItemWidth); hookLine != "" {
 341				content = hookLine + "\n\n" + content
 342			}
 343		}
 344
 345		height = lipgloss.Height(content)
 346		// cache the rendered content
 347		t.setCachedRender(content, toolItemWidth, height)
 348	}
 349
 350	return t.renderHighlighted(content, toolItemWidth, height)
 351}
 352
 353// Render renders the tool message item at the given width.
 354func (t *baseToolMessageItem) Render(width int) string {
 355	// Cache the prefixed output keyed by (width, prefix variant).
 356	// Bypass the cache while spinning (RawRender output is
 357	// frame-dependent) or while a highlight range is active.
 358	useCache := !t.isSpinning() && !t.isHighlighted()
 359	var key uint64
 360	switch {
 361	case t.isCompact:
 362		key = 2
 363	case t.focused:
 364		key = 1
 365	default:
 366		key = 0
 367	}
 368	if useCache {
 369		if cached, ok := t.getCachedPrefixedRender(width, key); ok {
 370			return cached
 371		}
 372	}
 373	var prefix string
 374	if t.isCompact {
 375		prefix = t.sty.Messages.ToolCallCompact.Render()
 376	} else if t.focused {
 377		prefix = t.sty.Messages.ToolCallFocused.Render()
 378	} else {
 379		prefix = t.sty.Messages.ToolCallBlurred.Render()
 380	}
 381	lines := strings.Split(t.RawRender(width), "\n")
 382	for i, ln := range lines {
 383		lines[i] = prefix + ln
 384	}
 385	out := strings.Join(lines, "\n")
 386	if useCache {
 387		t.setCachedPrefixedRender(out, width, key)
 388	}
 389	return out
 390}
 391
 392// ToolCall returns the tool call associated with this message item.
 393func (t *baseToolMessageItem) ToolCall() message.ToolCall {
 394	return t.toolCall
 395}
 396
 397// SetToolCall sets the tool call associated with this message item.
 398func (t *baseToolMessageItem) SetToolCall(tc message.ToolCall) {
 399	t.toolCall = tc
 400	t.clearCache()
 401	t.Bump()
 402}
 403
 404// SetResult sets the tool result associated with this message item.
 405func (t *baseToolMessageItem) SetResult(res *message.ToolResult) {
 406	t.result = res
 407	t.clearCache()
 408	t.Bump()
 409}
 410
 411// MessageID returns the ID of the message containing this tool call.
 412func (t *baseToolMessageItem) MessageID() string {
 413	return t.messageID
 414}
 415
 416// SetMessageID sets the ID of the message containing this tool call.
 417// MessageID is metadata only and does not affect the rendered output,
 418// so we deliberately do not bump the version here.
 419func (t *baseToolMessageItem) SetMessageID(id string) {
 420	t.messageID = id
 421}
 422
 423// SetStatus sets the tool status.
 424func (t *baseToolMessageItem) SetStatus(status ToolStatus) {
 425	if t.status == status {
 426		return
 427	}
 428	t.status = status
 429	t.clearCache()
 430	t.Bump()
 431}
 432
 433// Status returns the current tool status.
 434func (t *baseToolMessageItem) Status() ToolStatus {
 435	return t.status
 436}
 437
 438// computeStatus computes the effective status considering the result.
 439func (t *baseToolMessageItem) computeStatus() ToolStatus {
 440	if t.result != nil {
 441		if t.result.IsError {
 442			return ToolStatusError
 443		}
 444		return ToolStatusSuccess
 445	}
 446	return t.status
 447}
 448
 449// isSpinning returns true if the tool should show animation.
 450func (t *baseToolMessageItem) isSpinning() bool {
 451	if t.spinningFunc != nil {
 452		return t.spinningFunc(SpinningState{
 453			ToolCall: t.toolCall,
 454			Result:   t.result,
 455			Status:   t.status,
 456		})
 457	}
 458	return !t.toolCall.Finished && t.status != ToolStatusCanceled
 459}
 460
 461// SetSpinningFunc sets a custom function to determine if the tool should spin.
 462func (t *baseToolMessageItem) SetSpinningFunc(fn SpinningFunc) {
 463	t.spinningFunc = fn
 464}
 465
 466// ToggleExpanded toggles the expanded state of the thinking box.
 467func (t *baseToolMessageItem) ToggleExpanded() bool {
 468	t.expandedContent = !t.expandedContent
 469	t.clearCache()
 470	t.Bump()
 471	return t.expandedContent
 472}
 473
 474// Finished implements list.Item. A tool call is freezable once the
 475// tool call itself is marked finished AND a result has been recorded
 476// (or it has been canceled). Tools that override the spinning logic
 477// via spinningFunc would short-circuit live ticks; we still gate
 478// freezing on isSpinning to keep the contract conservative.
 479func (t *baseToolMessageItem) Finished() bool {
 480	if t.isSpinning() {
 481		return false
 482	}
 483	if t.status == ToolStatusCanceled {
 484		return true
 485	}
 486	return t.toolCall.Finished && t.result != nil
 487}
 488
 489// HandleMouseClick implements MouseClickable.
 490func (t *baseToolMessageItem) HandleMouseClick(btn ansi.MouseButton, x, y int) bool {
 491	return btn == ansi.MouseLeft
 492}
 493
 494// HandleKeyEvent implements KeyEventHandler.
 495func (t *baseToolMessageItem) HandleKeyEvent(key tea.KeyMsg) (bool, tea.Cmd) {
 496	if k := key.String(); k == "c" || k == "y" {
 497		text := t.formatToolForCopy()
 498		return true, common.CopyToClipboard(text, "Tool content copied to clipboard")
 499	}
 500	return false, nil
 501}
 502
 503// pendingTool renders a tool that is still in progress with an animation.
 504func pendingTool(sty *styles.Styles, name string, anim *anim.Anim, nested bool) string {
 505	icon := sty.Tool.IconPending.Render()
 506	nameStyle := sty.Tool.NameNormal
 507	if nested {
 508		nameStyle = sty.Tool.NameNested
 509	}
 510	toolName := nameStyle.Render(name)
 511
 512	var animView string
 513	if anim != nil {
 514		animView = anim.Render()
 515	}
 516
 517	return fmt.Sprintf("%s %s %s", icon, toolName, animView)
 518}
 519
 520// toolEarlyStateContent handles error/cancelled/pending states before content rendering.
 521// Returns the rendered output and true if early state was handled.
 522func toolEarlyStateContent(sty *styles.Styles, opts *ToolRenderOpts, width int) (string, bool) {
 523	var msg string
 524	switch opts.Status {
 525	case ToolStatusError:
 526		msg = toolErrorContent(sty, opts.Result, width)
 527	case ToolStatusCanceled:
 528		msg = sty.Tool.StateCancelled.Render("Canceled.")
 529	case ToolStatusAwaitingPermission:
 530		msg = sty.Tool.StateWaiting.Render("Requesting permission...")
 531	case ToolStatusRunning:
 532		msg = sty.Tool.StateWaiting.Render("Waiting for tool response...")
 533	default:
 534		return "", false
 535	}
 536	return msg, true
 537}
 538
 539// toolErrorContent formats an error message with ERROR tag.
 540func toolErrorContent(sty *styles.Styles, result *message.ToolResult, width int) string {
 541	if result == nil {
 542		return ""
 543	}
 544	errContent := strings.ReplaceAll(result.Content, "\n", " ")
 545	errTag := sty.Tool.ErrorTag.Render("ERROR")
 546	tagWidth := lipgloss.Width(errTag)
 547	errContent = ansi.Truncate(errContent, width-tagWidth-3, "…")
 548	return fmt.Sprintf("%s %s", errTag, sty.Tool.ErrorMessage.Render(errContent))
 549}
 550
 551// toolIcon returns the status icon for a tool call.
 552// toolIcon returns the status icon for a tool call based on its status.
 553func toolIcon(sty *styles.Styles, status ToolStatus) string {
 554	switch status {
 555	case ToolStatusSuccess:
 556		return sty.Tool.IconSuccess.String()
 557	case ToolStatusError:
 558		return sty.Tool.IconError.String()
 559	case ToolStatusCanceled:
 560		return sty.Tool.IconCancelled.String()
 561	default:
 562		return sty.Tool.IconPending.String()
 563	}
 564}
 565
 566// toolParamList formats parameters as "main (key=value, ...)" with truncation.
 567// toolParamList formats tool parameters as "main (key=value, ...)" with truncation.
 568func toolParamList(sty *styles.Styles, params []string, width int) string {
 569	// minSpaceForMainParam is the min space required for the main param
 570	// if this is less that the value set we will only show the main param nothing else
 571	const minSpaceForMainParam = 30
 572	if len(params) == 0 {
 573		return ""
 574	}
 575
 576	mainParam := params[0]
 577
 578	// Build key=value pairs from remaining params (consecutive key, value pairs).
 579	var kvPairs []string
 580	for i := 1; i+1 < len(params); i += 2 {
 581		if params[i+1] != "" {
 582			kvPairs = append(kvPairs, fmt.Sprintf("%s=%s", params[i], params[i+1]))
 583		}
 584	}
 585
 586	// Try to include key=value pairs if there's enough space.
 587	output := mainParam
 588	if len(kvPairs) > 0 {
 589		partsStr := strings.Join(kvPairs, ", ")
 590		if remaining := width - lipgloss.Width(partsStr) - 3; remaining >= minSpaceForMainParam {
 591			output = fmt.Sprintf("%s (%s)", mainParam, partsStr)
 592		}
 593	}
 594
 595	if width >= 0 {
 596		output = ansi.Truncate(output, width, "…")
 597	}
 598	return sty.Tool.ParamMain.Render(output)
 599}
 600
 601// toolHeader builds the tool header line: "● ToolName params..."
 602func toolHeader(sty *styles.Styles, status ToolStatus, name string, width int, nested bool, params ...string) string {
 603	icon := toolIcon(sty, status)
 604	nameStyle := sty.Tool.NameNormal
 605	if nested {
 606		nameStyle = sty.Tool.NameNested
 607	}
 608	toolName := nameStyle.Render(name)
 609	prefix := fmt.Sprintf("%s %s ", icon, toolName)
 610	prefixWidth := lipgloss.Width(prefix)
 611	remainingWidth := width - prefixWidth
 612	paramsStr := toolParamList(sty, params, remainingWidth)
 613	return prefix + paramsStr
 614}
 615
 616// toolOutputPlainContent renders plain text with optional expansion support.
 617func toolOutputPlainContent(sty *styles.Styles, content string, width int, expanded bool) string {
 618	content = stringext.NormalizeSpace(content)
 619	lines := strings.Split(content, "\n")
 620
 621	maxLines := responseContextHeight
 622	if expanded {
 623		maxLines = len(lines) // Show all
 624	}
 625
 626	var out []string
 627	for i, ln := range lines {
 628		if i >= maxLines {
 629			break
 630		}
 631		ln = " " + ln
 632		if lipgloss.Width(ln) > width {
 633			ln = ansi.Truncate(ln, width, "…")
 634		}
 635		out = append(out, sty.Tool.ContentLine.Width(width).Render(ln))
 636	}
 637
 638	wasTruncated := len(lines) > responseContextHeight
 639
 640	if !expanded && wasTruncated {
 641		out = append(out, sty.Tool.ContentTruncation.
 642			Width(width).
 643			Render(fmt.Sprintf(assistantMessageTruncateFormat, len(lines)-responseContextHeight)))
 644	}
 645
 646	return strings.Join(out, "\n")
 647}
 648
 649// toolOutputCodeContent renders code with syntax highlighting and line numbers.
 650func toolOutputCodeContent(sty *styles.Styles, path, content string, offset, width int, expanded bool) string {
 651	content = stringext.NormalizeSpace(content)
 652
 653	lines := strings.Split(content, "\n")
 654	maxLines := responseContextHeight
 655	if expanded {
 656		maxLines = len(lines)
 657	}
 658
 659	// Truncate if needed.
 660	displayLines := lines
 661	if len(lines) > maxLines {
 662		displayLines = lines[:maxLines]
 663	}
 664
 665	bg := sty.Tool.ContentCodeBg
 666	highlighted, _ := common.SyntaxHighlight(sty, strings.Join(displayLines, "\n"), path, bg)
 667	highlightedLines := strings.Split(highlighted, "\n")
 668
 669	// Calculate line number width.
 670	maxLineNumber := len(displayLines) + offset
 671	maxDigits := getDigits(maxLineNumber)
 672	numFmt := fmt.Sprintf("%%%dd", maxDigits)
 673
 674	bodyWidth := width - toolBodyLeftPaddingTotal
 675	codeWidth := bodyWidth - maxDigits
 676
 677	var out []string
 678	for i, ln := range highlightedLines {
 679		lineNum := sty.Tool.ContentLineNumber.Render(fmt.Sprintf(numFmt, i+1+offset))
 680
 681		// Truncate accounting for padding that will be added.
 682		ln = ansi.Truncate(ln, codeWidth-sty.Tool.ContentCodeLine.GetHorizontalPadding(), "…")
 683
 684		codeLine := sty.Tool.ContentCodeLine.
 685			Width(codeWidth).
 686			Render(ln)
 687
 688		out = append(out, lipgloss.JoinHorizontal(lipgloss.Left, lineNum, codeLine))
 689	}
 690
 691	// Add truncation message if needed.
 692	if len(lines) > maxLines && !expanded {
 693		out = append(out, sty.Tool.ContentCodeTruncation.
 694			Width(width).
 695			Render(fmt.Sprintf(assistantMessageTruncateFormat, len(lines)-maxLines)),
 696		)
 697	}
 698
 699	return sty.Tool.Body.Render(strings.Join(out, "\n"))
 700}
 701
 702// toolOutputImageContent renders image data with size info.
 703func toolOutputImageContent(sty *styles.Styles, data, mediaType string) string {
 704	dataSize := len(data) * 3 / 4
 705	sizeStr := formatSize(dataSize)
 706
 707	return sty.Tool.Body.Render(fmt.Sprintf(
 708		"%s %s %s %s",
 709		sty.Tool.ResourceLoadedText.Render("Loaded Image"),
 710		sty.Tool.ResourceLoadedIndicator.Render(styles.ArrowRightIcon),
 711		sty.Tool.MediaType.Render(mediaType),
 712		sty.Tool.ResourceSize.Render(sizeStr),
 713	))
 714}
 715
 716// toolOutputSkillContent renders a skill loaded indicator.
 717func toolOutputSkillContent(sty *styles.Styles, name, description string) string {
 718	return sty.Tool.Body.Render(fmt.Sprintf(
 719		"%s %s %s %s",
 720		sty.Tool.ResourceLoadedText.Render("Loaded Skill"),
 721		sty.Tool.ResourceLoadedIndicator.Render(styles.ArrowRightIcon),
 722		sty.Tool.ResourceName.Render(name),
 723		sty.Tool.ResourceSize.Render(description),
 724	))
 725}
 726
 727// toolOutputHookIndicator renders hook indicator lines from tool metadata.
 728// Returns empty string if no hook metadata is present. Hook names are
 729// sanitized (newlines replaced with ¶) and truncated to fit the available
 730// horizontal space.
 731func toolOutputHookIndicator(sty *styles.Styles, metadata string, width int) string {
 732	if metadata == "" {
 733		return ""
 734	}
 735	var meta struct {
 736		Hook *hooks.HookMetadata `json:"hook"`
 737	}
 738	if err := json.Unmarshal([]byte(metadata), &meta); err != nil || meta.Hook == nil {
 739		return ""
 740	}
 741	h := meta.Hook
 742	if len(h.Hooks) == 0 {
 743		return ""
 744	}
 745
 746	// Sanitize names (replace newlines with ¶) and compute max widths
 747	// for the name, matcher, and detail columns so they align. The name
 748	// column is capped at maxHookNameWidth characters.
 749	const maxHookNameWidth = 30
 750	sanitizedNames := make([]string, len(h.Hooks))
 751	details := make([]string, len(h.Hooks))
 752	maxNameWidth := 0
 753	maxMatcherWidth := 0
 754	maxDetailWidth := 0
 755	for i, hi := range h.Hooks {
 756		sanitizedNames[i] = strings.ReplaceAll(hi.Name, "\n", "¶")
 757		w := lipgloss.Width(sty.Tool.HookName.Render(sanitizedNames[i]))
 758		if w > maxNameWidth {
 759			maxNameWidth = w
 760		}
 761		if hi.Matcher != "" {
 762			mw := lipgloss.Width(sty.Tool.HookMatcher.Render(hi.Matcher))
 763			if mw > maxMatcherWidth {
 764				maxMatcherWidth = mw
 765			}
 766		}
 767		details[i] = hookDetail(sty, hi)
 768		if dw := lipgloss.Width(details[i]); dw > maxDetailWidth {
 769			maxDetailWidth = dw
 770		}
 771	}
 772
 773	if maxNameWidth > maxHookNameWidth {
 774		maxNameWidth = maxHookNameWidth
 775	}
 776
 777	// Cap the name column so the widest line still fits in width. The
 778	// per-line layout is:
 779	//   "Hook " + name(padded) + [" " + matcher(padded)] + " → " + detail
 780	if width > 0 {
 781		fixed := lipgloss.Width(sty.Tool.HookLabel.Render("Hook")) + 1
 782		if maxMatcherWidth > 0 {
 783			fixed += 1 + maxMatcherWidth
 784		}
 785		fixed += 1 + lipgloss.Width(sty.Tool.HookArrow.Render(styles.ArrowRightIcon)) + 1
 786		fixed += maxDetailWidth
 787		if budget := width - fixed; budget < maxNameWidth {
 788			maxNameWidth = max(1, budget)
 789		}
 790	}
 791
 792	var lines []string
 793	for i, hi := range h.Hooks {
 794		name := truncateHookName(sanitizedNames[i], maxNameWidth)
 795		lines = append(lines, renderHookLine(sty, hi, name, details[i], maxNameWidth, maxMatcherWidth))
 796	}
 797	return strings.Join(lines, "\n")
 798}
 799
 800// truncateHookName truncates a hook name to fit within maxWidth cells,
 801// using left-truncation for absolute paths (e.g. `…/format.sh`) and
 802// right-truncation for everything else. Left-truncation is only applied
 803// when the name looks unambiguously like a path: absolute, single-line,
 804// and contains no spaces.
 805func truncateHookName(name string, maxWidth int) string {
 806	if ansi.StringWidth(name) <= maxWidth {
 807		return name
 808	}
 809	if isLikelyPath(name) {
 810		// ansi.TruncateLeft removes n graphemes from the start; pick n
 811		// so the result plus the "…" prefix fits in maxWidth.
 812		n := ansi.StringWidth(name) - maxWidth + 1
 813		return ansi.TruncateLeft(name, n, "…")
 814	}
 815	return ansi.Truncate(name, maxWidth, "…")
 816}
 817
 818// isLikelyPath reports whether s looks unambiguously like a filesystem
 819// path, suitable for left-truncation. We accept absolute paths and
 820// relative paths that contain a separator and no shell-ish characters.
 821func isLikelyPath(s string) bool {
 822	if s == "" || strings.ContainsAny(s, " \t\n¶'\"|&;<>$`*?(){}[]\\") {
 823		return false
 824	}
 825	if filepath.IsAbs(s) {
 826		return true
 827	}
 828	return strings.Contains(s, "/")
 829}
 830
 831// renderHookLine renders a single hook indicator line with aligned columns.
 832func renderHookLine(sty *styles.Styles, hi hooks.HookInfo, rawName, detail string, maxNameWidth, maxMatcherWidth int) string {
 833	name := sty.Tool.HookName.Render(rawName)
 834	namePad := strings.Repeat(" ", max(0, maxNameWidth-lipgloss.Width(name)))
 835
 836	var matcherPart string
 837	if maxMatcherWidth > 0 {
 838		if hi.Matcher != "" {
 839			matcher := sty.Tool.HookMatcher.Render(hi.Matcher)
 840			matcherPad := strings.Repeat(" ", maxMatcherWidth-lipgloss.Width(matcher))
 841			matcherPart = " " + matcher + matcherPad
 842		} else {
 843			matcherPart = " " + strings.Repeat(" ", maxMatcherWidth)
 844		}
 845	}
 846
 847	labelStyle := sty.Tool.HookLabel
 848	arrowStyle := sty.Tool.HookArrow
 849	if hi.Decision == "deny" {
 850		labelStyle = sty.Tool.HookDeniedLabel
 851		arrowStyle = sty.Tool.HookDeniedLabel
 852	}
 853
 854	return fmt.Sprintf("%s %s%s%s %s %s",
 855		labelStyle.Render("Hook"),
 856		name,
 857		namePad,
 858		matcherPart,
 859		arrowStyle.Render(styles.ArrowRightIcon),
 860		detail,
 861	)
 862}
 863
 864// hookDetail returns the styled detail text for a single hook result.
 865func hookDetail(sty *styles.Styles, hi hooks.HookInfo) string {
 866	const (
 867		okMessage      = "OK"
 868		denialMessage  = "Denied"
 869		rewroteMessage = "Rewrote Output"
 870	)
 871	switch hi.Decision {
 872	case "deny":
 873		if hi.Reason != "" {
 874			return sty.Tool.HookDenied.Render(denialMessage) + " " + sty.Tool.HookDeniedReason.Render(hi.Reason)
 875		}
 876		return sty.Tool.HookDenied.Render(denialMessage)
 877	case "allow":
 878		result := sty.Tool.HookOK.Render(okMessage)
 879		if hi.InputRewrite {
 880			result += " " + sty.Tool.HookRewrote.Render(rewroteMessage)
 881		}
 882		return result
 883	default:
 884		result := sty.Tool.HookOK.Render(okMessage)
 885		if hi.InputRewrite {
 886			result += " " + sty.Tool.HookRewrote.Render(rewroteMessage)
 887		}
 888		return result
 889	}
 890}
 891
 892// getDigits returns the number of digits in a number.
 893func getDigits(n int) int {
 894	if n == 0 {
 895		return 1
 896	}
 897	if n < 0 {
 898		n = -n
 899	}
 900	digits := 0
 901	for n > 0 {
 902		n /= 10
 903		digits++
 904	}
 905	return digits
 906}
 907
 908// formatSize formats byte size into human readable format.
 909func formatSize(bytes int) string {
 910	const (
 911		kb = 1024
 912		mb = kb * 1024
 913	)
 914	switch {
 915	case bytes >= mb:
 916		return fmt.Sprintf("%.1f MB", float64(bytes)/float64(mb))
 917	case bytes >= kb:
 918		return fmt.Sprintf("%.1f KB", float64(bytes)/float64(kb))
 919	default:
 920		return fmt.Sprintf("%d B", bytes)
 921	}
 922}
 923
 924// toolOutputDiffContent renders a diff between old and new content.
 925func toolOutputDiffContent(sty *styles.Styles, file, oldContent, newContent string, width int, expanded bool) string {
 926	bodyWidth := width - toolBodyLeftPaddingTotal
 927
 928	formatter := common.DiffFormatter(sty).
 929		Before(file, oldContent).
 930		After(file, newContent).
 931		Width(bodyWidth)
 932
 933	// Use split view for wide terminals.
 934	if width > maxTextWidth {
 935		formatter = formatter.Split()
 936	}
 937
 938	formatted := formatter.String()
 939	lines := strings.Split(formatted, "\n")
 940
 941	// Truncate if needed.
 942	maxLines := responseContextHeight
 943	if expanded {
 944		maxLines = len(lines)
 945	}
 946
 947	if len(lines) > maxLines && !expanded {
 948		truncMsg := sty.Tool.DiffTruncation.
 949			Width(bodyWidth).
 950			Render(fmt.Sprintf(assistantMessageTruncateFormat, len(lines)-maxLines))
 951		formatted = strings.Join(lines[:maxLines], "\n") + "\n" + truncMsg
 952	}
 953
 954	return sty.Tool.Body.Render(formatted)
 955}
 956
 957// formatTimeout converts timeout seconds to a duration string (e.g., "30s").
 958// Returns empty string if timeout is 0.
 959func formatTimeout(timeout int) string {
 960	if timeout == 0 {
 961		return ""
 962	}
 963	return fmt.Sprintf("%ds", timeout)
 964}
 965
 966// formatNonZero returns string representation of non-zero integers, empty string for zero.
 967func formatNonZero(value int) string {
 968	if value == 0 {
 969		return ""
 970	}
 971	return fmt.Sprintf("%d", value)
 972}
 973
 974// toolOutputMultiEditDiffContent renders a diff with optional failed edits note.
 975func toolOutputMultiEditDiffContent(sty *styles.Styles, file string, meta tools.MultiEditResponseMetadata, totalEdits, width int, expanded bool) string {
 976	bodyWidth := width - toolBodyLeftPaddingTotal
 977
 978	formatter := common.DiffFormatter(sty).
 979		Before(file, meta.OldContent).
 980		After(file, meta.NewContent).
 981		Width(bodyWidth)
 982
 983	// Use split view for wide terminals.
 984	if width > maxTextWidth {
 985		formatter = formatter.Split()
 986	}
 987
 988	formatted := formatter.String()
 989	lines := strings.Split(formatted, "\n")
 990
 991	// Truncate if needed.
 992	maxLines := responseContextHeight
 993	if expanded {
 994		maxLines = len(lines)
 995	}
 996
 997	if len(lines) > maxLines && !expanded {
 998		truncMsg := sty.Tool.DiffTruncation.
 999			Width(bodyWidth).
1000			Render(fmt.Sprintf(assistantMessageTruncateFormat, len(lines)-maxLines))
1001		formatted = truncMsg + "\n" + strings.Join(lines[:maxLines], "\n")
1002	}
1003
1004	// Add failed edits note if any exist.
1005	if len(meta.EditsFailed) > 0 {
1006		noteTag := sty.Tool.NoteTag.Render("Note")
1007		noteMsg := fmt.Sprintf("%d of %d edits succeeded", meta.EditsApplied, totalEdits)
1008		note := fmt.Sprintf("%s %s", noteTag, sty.Tool.NoteMessage.Render(noteMsg))
1009		formatted = formatted + "\n\n" + note
1010	}
1011
1012	return sty.Tool.Body.Render(formatted)
1013}
1014
1015// roundedEnumerator creates a tree enumerator with rounded corners.
1016func roundedEnumerator(lPadding, width int) tree.Enumerator {
1017	if width == 0 {
1018		width = 2
1019	}
1020	if lPadding == 0 {
1021		lPadding = 1
1022	}
1023	return func(children tree.Children, index int) string {
1024		line := strings.Repeat("─", width)
1025		padding := strings.Repeat(" ", lPadding)
1026		if children.Length()-1 == index {
1027			return padding + "╰" + line
1028		}
1029		return padding + "├" + line
1030	}
1031}
1032
1033// toolOutputMarkdownContent renders markdown content with optional truncation.
1034func toolOutputMarkdownContent(sty *styles.Styles, content string, width int, expanded bool) string {
1035	content = stringext.NormalizeSpace(content)
1036
1037	// Cap width for readability.
1038	if width > maxTextWidth {
1039		width = maxTextWidth
1040	}
1041
1042	renderer := common.QuietMarkdownRenderer(sty, width)
1043	mu := common.LockMarkdownRenderer(renderer)
1044	mu.Lock()
1045	rendered, err := renderer.Render(content)
1046	mu.Unlock()
1047	if err != nil {
1048		return toolOutputPlainContent(sty, content, width, expanded)
1049	}
1050
1051	lines := strings.Split(rendered, "\n")
1052	maxLines := responseContextHeight
1053	if expanded {
1054		maxLines = len(lines)
1055	}
1056
1057	var out []string
1058	for i, ln := range lines {
1059		if i >= maxLines {
1060			break
1061		}
1062		out = append(out, ln)
1063	}
1064
1065	if len(lines) > maxLines && !expanded {
1066		out = append(out, sty.Tool.ContentTruncation.
1067			Width(width).
1068			Render(fmt.Sprintf(assistantMessageTruncateFormat, len(lines)-maxLines)),
1069		)
1070	}
1071
1072	return sty.Tool.Body.Render(strings.Join(out, "\n"))
1073}
1074
1075// formatToolForCopy formats the tool call for clipboard copying.
1076func (t *baseToolMessageItem) formatToolForCopy() string {
1077	var parts []string
1078
1079	toolName := prettifyToolName(t.toolCall.Name)
1080	parts = append(parts, fmt.Sprintf("## %s Tool Call", toolName))
1081
1082	if t.toolCall.Input != "" {
1083		params := t.formatParametersForCopy()
1084		if params != "" {
1085			parts = append(parts, "### Parameters:")
1086			parts = append(parts, params)
1087		}
1088	}
1089
1090	if t.result != nil && t.result.ToolCallID != "" {
1091		if t.result.IsError {
1092			parts = append(parts, "### Error:")
1093			parts = append(parts, t.result.Content)
1094		} else {
1095			parts = append(parts, "### Result:")
1096			content := t.formatResultForCopy()
1097			if content != "" {
1098				parts = append(parts, content)
1099			}
1100		}
1101	} else if t.status == ToolStatusCanceled {
1102		parts = append(parts, "### Status:")
1103		parts = append(parts, "Cancelled")
1104	} else {
1105		parts = append(parts, "### Status:")
1106		parts = append(parts, "Pending...")
1107	}
1108
1109	return strings.Join(parts, "\n\n")
1110}
1111
1112// formatParametersForCopy formats tool parameters for clipboard copying.
1113func (t *baseToolMessageItem) formatParametersForCopy() string {
1114	switch t.toolCall.Name {
1115	case tools.BashToolName:
1116		var params tools.BashParams
1117		if json.Unmarshal([]byte(t.toolCall.Input), &params) == nil {
1118			cmd := strings.ReplaceAll(params.Command, "\n", " ")
1119			cmd = strings.ReplaceAll(cmd, "\t", "    ")
1120			return fmt.Sprintf("**Command:** %s", cmd)
1121		}
1122	case tools.ViewToolName:
1123		var params tools.ViewParams
1124		if json.Unmarshal([]byte(t.toolCall.Input), &params) == nil {
1125			var parts []string
1126			parts = append(parts, fmt.Sprintf("**File:** %s", fsext.PrettyPath(params.FilePath)))
1127			if params.Limit > 0 {
1128				parts = append(parts, fmt.Sprintf("**Limit:** %d", params.Limit))
1129			}
1130			if params.Offset > 0 {
1131				parts = append(parts, fmt.Sprintf("**Offset:** %d", params.Offset))
1132			}
1133			return strings.Join(parts, "\n")
1134		}
1135	case tools.EditToolName:
1136		var params tools.EditParams
1137		if json.Unmarshal([]byte(t.toolCall.Input), &params) == nil {
1138			return fmt.Sprintf("**File:** %s", fsext.PrettyPath(params.FilePath))
1139		}
1140	case tools.MultiEditToolName:
1141		var params tools.MultiEditParams
1142		if json.Unmarshal([]byte(t.toolCall.Input), &params) == nil {
1143			var parts []string
1144			parts = append(parts, fmt.Sprintf("**File:** %s", fsext.PrettyPath(params.FilePath)))
1145			parts = append(parts, fmt.Sprintf("**Edits:** %d", len(params.Edits)))
1146			return strings.Join(parts, "\n")
1147		}
1148	case tools.WriteToolName:
1149		var params tools.WriteParams
1150		if json.Unmarshal([]byte(t.toolCall.Input), &params) == nil {
1151			return fmt.Sprintf("**File:** %s", fsext.PrettyPath(params.FilePath))
1152		}
1153	case tools.FetchToolName:
1154		var params tools.FetchParams
1155		if json.Unmarshal([]byte(t.toolCall.Input), &params) == nil {
1156			var parts []string
1157			parts = append(parts, fmt.Sprintf("**URL:** %s", params.URL))
1158			if params.Format != "" {
1159				parts = append(parts, fmt.Sprintf("**Format:** %s", params.Format))
1160			}
1161			if params.Timeout > 0 {
1162				parts = append(parts, fmt.Sprintf("**Timeout:** %ds", params.Timeout))
1163			}
1164			return strings.Join(parts, "\n")
1165		}
1166	case tools.AgenticFetchToolName:
1167		var params tools.AgenticFetchParams
1168		if json.Unmarshal([]byte(t.toolCall.Input), &params) == nil {
1169			var parts []string
1170			if params.URL != "" {
1171				parts = append(parts, fmt.Sprintf("**URL:** %s", params.URL))
1172			}
1173			if params.Prompt != "" {
1174				parts = append(parts, fmt.Sprintf("**Prompt:** %s", params.Prompt))
1175			}
1176			return strings.Join(parts, "\n")
1177		}
1178	case tools.WebFetchToolName:
1179		var params tools.WebFetchParams
1180		if json.Unmarshal([]byte(t.toolCall.Input), &params) == nil {
1181			return fmt.Sprintf("**URL:** %s", params.URL)
1182		}
1183	case tools.GrepToolName:
1184		var params tools.GrepParams
1185		if json.Unmarshal([]byte(t.toolCall.Input), &params) == nil {
1186			var parts []string
1187			parts = append(parts, fmt.Sprintf("**Pattern:** %s", params.Pattern))
1188			if params.Path != "" {
1189				parts = append(parts, fmt.Sprintf("**Path:** %s", params.Path))
1190			}
1191			if params.Include != "" {
1192				parts = append(parts, fmt.Sprintf("**Include:** %s", params.Include))
1193			}
1194			if params.LiteralText {
1195				parts = append(parts, "**Literal:** true")
1196			}
1197			return strings.Join(parts, "\n")
1198		}
1199	case tools.GlobToolName:
1200		var params tools.GlobParams
1201		if json.Unmarshal([]byte(t.toolCall.Input), &params) == nil {
1202			var parts []string
1203			parts = append(parts, fmt.Sprintf("**Pattern:** %s", params.Pattern))
1204			if params.Path != "" {
1205				parts = append(parts, fmt.Sprintf("**Path:** %s", params.Path))
1206			}
1207			return strings.Join(parts, "\n")
1208		}
1209	case tools.LSToolName:
1210		var params tools.LSParams
1211		if json.Unmarshal([]byte(t.toolCall.Input), &params) == nil {
1212			path := params.Path
1213			if path == "" {
1214				path = "."
1215			}
1216			return fmt.Sprintf("**Path:** %s", fsext.PrettyPath(path))
1217		}
1218	case tools.DownloadToolName:
1219		var params tools.DownloadParams
1220		if json.Unmarshal([]byte(t.toolCall.Input), &params) == nil {
1221			var parts []string
1222			parts = append(parts, fmt.Sprintf("**URL:** %s", params.URL))
1223			parts = append(parts, fmt.Sprintf("**File Path:** %s", fsext.PrettyPath(params.FilePath)))
1224			if params.Timeout > 0 {
1225				parts = append(parts, fmt.Sprintf("**Timeout:** %s", (time.Duration(params.Timeout)*time.Second).String()))
1226			}
1227			return strings.Join(parts, "\n")
1228		}
1229	case tools.SourcegraphToolName:
1230		var params tools.SourcegraphParams
1231		if json.Unmarshal([]byte(t.toolCall.Input), &params) == nil {
1232			var parts []string
1233			parts = append(parts, fmt.Sprintf("**Query:** %s", params.Query))
1234			if params.Count > 0 {
1235				parts = append(parts, fmt.Sprintf("**Count:** %d", params.Count))
1236			}
1237			if params.ContextWindow > 0 {
1238				parts = append(parts, fmt.Sprintf("**Context:** %d", params.ContextWindow))
1239			}
1240			return strings.Join(parts, "\n")
1241		}
1242	case tools.DiagnosticsToolName:
1243		return "**Project:** diagnostics"
1244	case agent.AgentToolName:
1245		var params agent.AgentParams
1246		if json.Unmarshal([]byte(t.toolCall.Input), &params) == nil {
1247			return fmt.Sprintf("**Task:**\n%s", params.Prompt)
1248		}
1249	}
1250
1251	var params map[string]any
1252	if json.Unmarshal([]byte(t.toolCall.Input), &params) == nil {
1253		var parts []string
1254		for key, value := range params {
1255			displayKey := strings.ReplaceAll(key, "_", " ")
1256			if len(displayKey) > 0 {
1257				displayKey = strings.ToUpper(displayKey[:1]) + displayKey[1:]
1258			}
1259			parts = append(parts, fmt.Sprintf("**%s:** %v", displayKey, value))
1260		}
1261		return strings.Join(parts, "\n")
1262	}
1263
1264	return ""
1265}
1266
1267// formatResultForCopy formats tool results for clipboard copying.
1268func (t *baseToolMessageItem) formatResultForCopy() string {
1269	if t.result == nil {
1270		return ""
1271	}
1272
1273	if t.result.Data != "" {
1274		if strings.HasPrefix(t.result.MIMEType, "image/") {
1275			return fmt.Sprintf("[Image: %s]", t.result.MIMEType)
1276		}
1277		return fmt.Sprintf("[Media: %s]", t.result.MIMEType)
1278	}
1279
1280	switch t.toolCall.Name {
1281	case tools.BashToolName:
1282		return t.formatBashResultForCopy()
1283	case tools.ViewToolName:
1284		return t.formatViewResultForCopy()
1285	case tools.EditToolName:
1286		return t.formatEditResultForCopy()
1287	case tools.MultiEditToolName:
1288		return t.formatMultiEditResultForCopy()
1289	case tools.WriteToolName:
1290		return t.formatWriteResultForCopy()
1291	case tools.FetchToolName:
1292		return t.formatFetchResultForCopy()
1293	case tools.AgenticFetchToolName:
1294		return t.formatAgenticFetchResultForCopy()
1295	case tools.WebFetchToolName:
1296		return t.formatWebFetchResultForCopy()
1297	case agent.AgentToolName:
1298		return t.formatAgentResultForCopy()
1299	case tools.DownloadToolName, tools.GrepToolName, tools.GlobToolName, tools.LSToolName, tools.SourcegraphToolName, tools.DiagnosticsToolName, tools.TodosToolName:
1300		return fmt.Sprintf("```\n%s\n```", t.result.Content)
1301	default:
1302		return t.result.Content
1303	}
1304}
1305
1306// formatBashResultForCopy formats bash tool results for clipboard.
1307func (t *baseToolMessageItem) formatBashResultForCopy() string {
1308	if t.result == nil {
1309		return ""
1310	}
1311
1312	var meta tools.BashResponseMetadata
1313	if t.result.Metadata != "" {
1314		json.Unmarshal([]byte(t.result.Metadata), &meta)
1315	}
1316
1317	output := meta.Output
1318	if output == "" && t.result.Content != tools.BashNoOutput {
1319		output = t.result.Content
1320	}
1321
1322	if output == "" {
1323		return ""
1324	}
1325
1326	return fmt.Sprintf("```bash\n%s\n```", output)
1327}
1328
1329// formatViewResultForCopy formats view tool results for clipboard.
1330func (t *baseToolMessageItem) formatViewResultForCopy() string {
1331	if t.result == nil {
1332		return ""
1333	}
1334
1335	var meta tools.ViewResponseMetadata
1336	if t.result.Metadata != "" {
1337		json.Unmarshal([]byte(t.result.Metadata), &meta)
1338	}
1339
1340	if meta.Content == "" {
1341		return t.result.Content
1342	}
1343
1344	lang := ""
1345	if meta.FilePath != "" {
1346		ext := strings.ToLower(filepath.Ext(meta.FilePath))
1347		switch ext {
1348		case ".go":
1349			lang = "go"
1350		case ".js", ".mjs":
1351			lang = "javascript"
1352		case ".ts":
1353			lang = "typescript"
1354		case ".py":
1355			lang = "python"
1356		case ".rs":
1357			lang = "rust"
1358		case ".java":
1359			lang = "java"
1360		case ".c":
1361			lang = "c"
1362		case ".cpp", ".cc", ".cxx":
1363			lang = "cpp"
1364		case ".sh", ".bash":
1365			lang = "bash"
1366		case ".json":
1367			lang = "json"
1368		case ".yaml", ".yml":
1369			lang = "yaml"
1370		case ".xml":
1371			lang = "xml"
1372		case ".html":
1373			lang = "html"
1374		case ".css":
1375			lang = "css"
1376		case ".md":
1377			lang = "markdown"
1378		}
1379	}
1380
1381	var result strings.Builder
1382	if lang != "" {
1383		fmt.Fprintf(&result, "```%s\n", lang)
1384	} else {
1385		result.WriteString("```\n")
1386	}
1387	result.WriteString(meta.Content)
1388	result.WriteString("\n```")
1389
1390	return result.String()
1391}
1392
1393// formatEditResultForCopy formats edit tool results for clipboard.
1394func (t *baseToolMessageItem) formatEditResultForCopy() string {
1395	if t.result == nil || t.result.Metadata == "" {
1396		if t.result != nil {
1397			return t.result.Content
1398		}
1399		return ""
1400	}
1401
1402	var meta tools.EditResponseMetadata
1403	if json.Unmarshal([]byte(t.result.Metadata), &meta) != nil {
1404		return t.result.Content
1405	}
1406
1407	var params tools.EditParams
1408	json.Unmarshal([]byte(t.toolCall.Input), &params)
1409
1410	var result strings.Builder
1411
1412	if meta.OldContent != "" || meta.NewContent != "" {
1413		fileName := params.FilePath
1414		if fileName != "" {
1415			fileName = fsext.PrettyPath(fileName)
1416		}
1417		diffContent, additions, removals := diff.GenerateDiff(meta.OldContent, meta.NewContent, fileName)
1418
1419		fmt.Fprintf(&result, "Changes: +%d -%d\n", additions, removals)
1420		result.WriteString("```diff\n")
1421		result.WriteString(diffContent)
1422		result.WriteString("\n```")
1423	}
1424
1425	return result.String()
1426}
1427
1428// formatMultiEditResultForCopy formats multi-edit tool results for clipboard.
1429func (t *baseToolMessageItem) formatMultiEditResultForCopy() string {
1430	if t.result == nil || t.result.Metadata == "" {
1431		if t.result != nil {
1432			return t.result.Content
1433		}
1434		return ""
1435	}
1436
1437	var meta tools.MultiEditResponseMetadata
1438	if json.Unmarshal([]byte(t.result.Metadata), &meta) != nil {
1439		return t.result.Content
1440	}
1441
1442	var params tools.MultiEditParams
1443	json.Unmarshal([]byte(t.toolCall.Input), &params)
1444
1445	var result strings.Builder
1446	if meta.OldContent != "" || meta.NewContent != "" {
1447		fileName := params.FilePath
1448		if fileName != "" {
1449			fileName = fsext.PrettyPath(fileName)
1450		}
1451		diffContent, additions, removals := diff.GenerateDiff(meta.OldContent, meta.NewContent, fileName)
1452
1453		fmt.Fprintf(&result, "Changes: +%d -%d\n", additions, removals)
1454		result.WriteString("```diff\n")
1455		result.WriteString(diffContent)
1456		result.WriteString("\n```")
1457	}
1458
1459	return result.String()
1460}
1461
1462// formatWriteResultForCopy formats write tool results for clipboard.
1463func (t *baseToolMessageItem) formatWriteResultForCopy() string {
1464	if t.result == nil {
1465		return ""
1466	}
1467
1468	var params tools.WriteParams
1469	if json.Unmarshal([]byte(t.toolCall.Input), &params) != nil {
1470		return t.result.Content
1471	}
1472
1473	lang := ""
1474	if params.FilePath != "" {
1475		ext := strings.ToLower(filepath.Ext(params.FilePath))
1476		switch ext {
1477		case ".go":
1478			lang = "go"
1479		case ".js", ".mjs":
1480			lang = "javascript"
1481		case ".ts":
1482			lang = "typescript"
1483		case ".py":
1484			lang = "python"
1485		case ".rs":
1486			lang = "rust"
1487		case ".java":
1488			lang = "java"
1489		case ".c":
1490			lang = "c"
1491		case ".cpp", ".cc", ".cxx":
1492			lang = "cpp"
1493		case ".sh", ".bash":
1494			lang = "bash"
1495		case ".json":
1496			lang = "json"
1497		case ".yaml", ".yml":
1498			lang = "yaml"
1499		case ".xml":
1500			lang = "xml"
1501		case ".html":
1502			lang = "html"
1503		case ".css":
1504			lang = "css"
1505		case ".md":
1506			lang = "markdown"
1507		}
1508	}
1509
1510	var result strings.Builder
1511	fmt.Fprintf(&result, "File: %s\n", fsext.PrettyPath(params.FilePath))
1512	if lang != "" {
1513		fmt.Fprintf(&result, "```%s\n", lang)
1514	} else {
1515		result.WriteString("```\n")
1516	}
1517	result.WriteString(params.Content)
1518	result.WriteString("\n```")
1519
1520	return result.String()
1521}
1522
1523// formatFetchResultForCopy formats fetch tool results for clipboard.
1524func (t *baseToolMessageItem) formatFetchResultForCopy() string {
1525	if t.result == nil {
1526		return ""
1527	}
1528
1529	var params tools.FetchParams
1530	if json.Unmarshal([]byte(t.toolCall.Input), &params) != nil {
1531		return t.result.Content
1532	}
1533
1534	var result strings.Builder
1535	if params.URL != "" {
1536		fmt.Fprintf(&result, "URL: %s\n", params.URL)
1537	}
1538	if params.Format != "" {
1539		fmt.Fprintf(&result, "Format: %s\n", params.Format)
1540	}
1541	if params.Timeout > 0 {
1542		fmt.Fprintf(&result, "Timeout: %ds\n", params.Timeout)
1543	}
1544	result.WriteString("\n")
1545
1546	result.WriteString(t.result.Content)
1547
1548	return result.String()
1549}
1550
1551// formatAgenticFetchResultForCopy formats agentic fetch tool results for clipboard.
1552func (t *baseToolMessageItem) formatAgenticFetchResultForCopy() string {
1553	if t.result == nil {
1554		return ""
1555	}
1556
1557	var params tools.AgenticFetchParams
1558	if json.Unmarshal([]byte(t.toolCall.Input), &params) != nil {
1559		return t.result.Content
1560	}
1561
1562	var result strings.Builder
1563	if params.URL != "" {
1564		fmt.Fprintf(&result, "URL: %s\n", params.URL)
1565	}
1566	if params.Prompt != "" {
1567		fmt.Fprintf(&result, "Prompt: %s\n\n", params.Prompt)
1568	}
1569
1570	result.WriteString("```markdown\n")
1571	result.WriteString(t.result.Content)
1572	result.WriteString("\n```")
1573
1574	return result.String()
1575}
1576
1577// formatWebFetchResultForCopy formats web fetch tool results for clipboard.
1578func (t *baseToolMessageItem) formatWebFetchResultForCopy() string {
1579	if t.result == nil {
1580		return ""
1581	}
1582
1583	var params tools.WebFetchParams
1584	if json.Unmarshal([]byte(t.toolCall.Input), &params) != nil {
1585		return t.result.Content
1586	}
1587
1588	var result strings.Builder
1589	fmt.Fprintf(&result, "URL: %s\n\n", params.URL)
1590	result.WriteString("```markdown\n")
1591	result.WriteString(t.result.Content)
1592	result.WriteString("\n```")
1593
1594	return result.String()
1595}
1596
1597// formatAgentResultForCopy formats agent tool results for clipboard.
1598func (t *baseToolMessageItem) formatAgentResultForCopy() string {
1599	if t.result == nil {
1600		return ""
1601	}
1602
1603	var result strings.Builder
1604
1605	if t.result.Content != "" {
1606		fmt.Fprintf(&result, "```markdown\n%s\n```", t.result.Content)
1607	}
1608
1609	return result.String()
1610}
1611
1612// prettifyToolName returns a human-readable name for tool names.
1613func prettifyToolName(name string) string {
1614	switch name {
1615	case agent.AgentToolName:
1616		return "Agent"
1617	case tools.BashToolName:
1618		return "Bash"
1619	case tools.JobOutputToolName:
1620		return "Job: Output"
1621	case tools.JobKillToolName:
1622		return "Job: Kill"
1623	case tools.DownloadToolName:
1624		return "Download"
1625	case tools.EditToolName:
1626		return "Edit"
1627	case tools.MultiEditToolName:
1628		return "Multi-Edit"
1629	case tools.FetchToolName:
1630		return "Fetch"
1631	case tools.AgenticFetchToolName:
1632		return "Agentic Fetch"
1633	case tools.WebFetchToolName:
1634		return "Fetch"
1635	case tools.WebSearchToolName:
1636		return "Search"
1637	case tools.GlobToolName:
1638		return "Glob"
1639	case tools.GrepToolName:
1640		return "Grep"
1641	case tools.LSToolName:
1642		return "List"
1643	case tools.SourcegraphToolName:
1644		return "Sourcegraph"
1645	case tools.TodosToolName:
1646		return "To-Do"
1647	case tools.ViewToolName:
1648		return "View"
1649	case tools.WriteToolName:
1650		return "Write"
1651	default:
1652		return humanizedToolName(name)
1653	}
1654}