feat: add delete conversation feature with Ctrl+D

- Add delete confirmation prompt with y/N option
- Show red confirmation message and error handling
- Store full file path in Conversation struct for correct deletion
- Update help text and documentation

Test improvements:
- Increase coverage from 20.5% to 69.3% (3.4x improvement)
- Add comprehensive tests for TUI logic, keyboard navigation, mouse scrolling
- Test delete flow, filter logic, and UI rendering
- Refactor getProjectsDir to variable for testability
- Fix bug: updateFilter now properly copies slice to avoid corruption

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: brtkwr

AGENTS.md

@@ -13,6 +13,14 @@ go build
 go test -v -cover
 ```
 
+### Test Coverage
+
+- **Target**: 60%+ statement coverage
+- **Current**: ~69%
+- All new features must include tests
+- Break logic into testable functions when possible
+- Refactor for testability (e.g., use variables instead of functions for dependency injection)
+
 ### Run locally
 
 ```bash
@@ -69,24 +77,26 @@ go test -v -cover
 - `Conversation` - Parsed conversation with messages, timestamps, cwd
 - `Message` - Single message (role, text, timestamp)
 - `listItem` - Display item with conversation and search text
-- `model` - Bubbletea application state
+- `model` - Bubbletea application state (includes delete confirmation state)
 
 ### Key Functions
 
 - `getConversations(cutoff, maxSize)` - Loads conversations from `~/.claude/projects/` with filters
 - `parseConversationFile(path, cutoff, maxSize)` - Parses JSONL files, skips by mtime/size
 - `buildItems()` - Creates list items with searchable text
 - `initialModel()` - Sets up bubbletea TUI
-- `Update()` - Handles keyboard/mouse input
-- `View()` - Renders the TUI
+- `Update()` - Handles keyboard/mouse input, including delete confirmation
+- `View()` - Renders the TUI with delete confirmation prompt
 - `renderPreview()` - Renders conversation preview with highlights
 - `formatListItem()` - Formats a single list row
+- `deleteConversation()` - Removes conversation file and updates UI state
+- `getTopic()` - Extracts first user message as topic
 
 ### TUI Layout
 
 ```
-  ccs · claude code search                    ↑/↓ Enter Ctrl+J/K Esc
-  > type to search...                                       (N/total)
+  ccs · claude code search    Resume:Enter Delete:Ctrl+D Scroll:Ctrl+J/K Exit:Esc
+  > type to search...                                                     (N/total)
 
   DATE              PROJECT               TOPIC                 MSGS  HITS
 ────────────────────────────────────────────────────────────────────────────

README.md

@@ -14,6 +14,7 @@ Globally search and resume [Claude Code](https://claude.ai/claude-code) conversa
 - Preview conversation context with search term highlighting
 - See message counts and hit counts per conversation
 - Resume conversations directly from the search interface
+- Delete conversations with confirmation prompt
 - Pass flags through to `claude` (e.g., `--plan`)
 - Mouse wheel scrolling support
 
@@ -75,6 +76,7 @@ ccs buyer -- --plan
 
 - `↑/↓` or `Ctrl+P/N` - Navigate list
 - `Enter` - Resume selected conversation
+- `Ctrl+D` - Delete selected conversation (with confirmation)
 - `Ctrl+J/K` - Scroll preview
 - `Mouse wheel` - Scroll list or preview (context-aware)
 - `Ctrl+U` - Clear search

main.go

@@ -34,6 +34,7 @@ type Conversation struct {
 	FirstTimestamp string    `json:"first_timestamp"`
 	LastTimestamp  string    `json:"last_timestamp"`
 	Messages       []Message `json:"messages"`
+	FilePath       string    `json:"file_path"` // Full path to the .jsonl file
 }
 
 // RawMessage represents the JSON structure in conversation files
@@ -107,6 +108,9 @@ type model struct {
 	quitting       bool
 	claudeFlags    []string
 	mouseInPreview bool // Track if mouse is in preview area
+	confirmDelete  bool   // Are we in delete confirmation mode?
+	deleteIndex    int    // Index of item to delete
+	errorMsg       string // Show deletion errors
 }
 
 func initialModel(items []listItem, filterQuery string, claudeFlags []string) model {
@@ -129,7 +133,9 @@ func initialModel(items []listItem, filterQuery string, claudeFlags []string) mo
 func (m *model) updateFilter() {
 	query := m.textInput.Value()
 	if query == "" {
-		m.filtered = m.items
+		// Make a copy to avoid sharing backing array with m.items
+		m.filtered = make([]listItem, len(m.items))
+		copy(m.filtered, m.items)
 	} else {
 		// Exact substring matching (case-insensitive)
 		queryLower := strings.ToLower(query)
@@ -193,6 +199,24 @@ func (m model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 		return m, nil
 
 	case tea.KeyMsg:
+		// Handle delete confirmation mode
+		if m.confirmDelete {
+			switch msg.String() {
+			case "y", "Y":
+				m.deleteConversation()
+				return m, nil
+			case "n", "N", "esc":
+				m.confirmDelete = false
+				return m, nil
+			}
+			return m, nil // Ignore all other keys
+		}
+
+		// Clear error message on any keypress in normal mode
+		if m.errorMsg != "" {
+			m.errorMsg = ""
+		}
+
 		switch msg.String() {
 		case "ctrl+c", "esc":
 			m.quitting = true
@@ -205,6 +229,13 @@ func (m model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 			m.quitting = true
 			return m, tea.Quit
 
+		case "ctrl+d":
+			if len(m.filtered) > 0 {
+				m.confirmDelete = true
+				m.deleteIndex = m.cursor
+			}
+			return m, nil
+
 		case "up", "ctrl+p":
 			if m.cursor > 0 {
 				m.cursor--
@@ -256,22 +287,41 @@ func (m model) View() string {
 
 	// Title line with help right-aligned
 	title := fmt.Sprintf("ccs · claude code search · %s", version)
-	help := "↑/↓ Enter Ctrl+J/K Esc"
+	help := "Resume:Enter Delete:Ctrl+D Scroll:Ctrl+J/K Exit:Esc"
 	titlePadding := tableWidth - 2 - len(title) - len(help)
 	if titlePadding < 1 {
 		titlePadding = 1
 	}
 	b.WriteString(fmt.Sprintf("  \033[1;36mccs\033[0m \033[90m· claude code search · %s%s%s\033[0m\n",
 		version, strings.Repeat(" ", titlePadding), help))
 
-	// Search line with count right-aligned
-	count := fmt.Sprintf("(%d/%d)", len(m.filtered), len(m.items))
-	searchPadding := tableWidth - 2 - 2 - 40 - len(count) - 1 // 2 for indent, 2 for "> ", 40 for textInput, -1 to shift left
-	if searchPadding < 1 {
-		searchPadding = 1
+	// Search line or delete confirmation
+	var sections []string
+	var inputSection string
+	if m.confirmDelete {
+		topic := getTopic(m.filtered[m.deleteIndex].conv)
+		inputSection = lipgloss.NewStyle().
+			Foreground(lipgloss.Color("196")). // Red
+			Render(fmt.Sprintf("Delete conversation \"%s\"? [y/N]", truncate(topic, 50)))
+		sections = append(sections, "  "+inputSection)
+	} else {
+		count := fmt.Sprintf("(%d/%d)", len(m.filtered), len(m.items))
+		searchPadding := tableWidth - 2 - 2 - 40 - len(count) - 1 // 2 for indent, 2 for "> ", 40 for textInput, -1 to shift left
+		if searchPadding < 1 {
+			searchPadding = 1
+		}
+		inputSection = fmt.Sprintf("  %s%s\033[90m%s\033[0m", m.textInput.View(), strings.Repeat(" ", searchPadding), count)
+		sections = append(sections, inputSection)
 	}
-	b.WriteString(fmt.Sprintf("  %s%s\033[90m%s\033[0m\n\n",
-		m.textInput.View(), strings.Repeat(" ", searchPadding), count))
+
+	// Show error message if set
+	if m.errorMsg != "" {
+		errorStyle := lipgloss.NewStyle().Foreground(lipgloss.Color("196"))
+		sections = append(sections, "  "+errorStyle.Render(m.errorMsg))
+	}
+
+	b.WriteString(strings.Join(sections, "\n"))
+	b.WriteString("\n\n")
 
 	// Calculate heights
 	listHeight := m.height * 30 / 100
@@ -519,7 +569,9 @@ func padRight(s string, length int) string {
 // Data loading (preserved from original)
 // ============================================================================
 
-func getProjectsDir() string {
+// getProjectsDir returns the path to the Claude projects directory
+// Declared as a variable so it can be overridden in tests
+var getProjectsDir = func() string {
 	home, _ := os.UserHomeDir()
 	return filepath.Join(home, ".claude", "projects")
 }
@@ -573,7 +625,10 @@ func parseConversationFile(path string, cutoff time.Time, maxSize int64) (*Conve
 	}
 
 	sessionID := strings.TrimSuffix(info.Name(), ".jsonl")
-	conv := &Conversation{SessionID: sessionID}
+	conv := &Conversation{
+		SessionID: sessionID,
+		FilePath:  path,
+	}
 
 	file, err := os.Open(path)
 	if err != nil {
@@ -712,6 +767,55 @@ func truncate(s string, maxLen int) string {
 	return s[:maxLen-3] + "..."
 }
 
+// getTopic returns the first user message or session ID
+func getTopic(conv Conversation) string {
+	for _, msg := range conv.Messages {
+		if msg.Role == "user" {
+			return msg.Text
+		}
+	}
+	return conv.SessionID
+}
+
+// deleteConversation removes the selected conversation from disk and UI
+func (m *model) deleteConversation() {
+	if m.deleteIndex >= len(m.filtered) {
+		return
+	}
+
+	conv := m.filtered[m.deleteIndex].conv
+
+	// Delete the file (ignore if already deleted)
+	if err := os.Remove(conv.FilePath); err != nil && !os.IsNotExist(err) {
+		m.errorMsg = fmt.Sprintf("Delete failed: %v", err)
+		m.confirmDelete = false
+		return
+	}
+
+	// Remove from filtered slice
+	m.filtered = append(m.filtered[:m.deleteIndex], m.filtered[m.deleteIndex+1:]...)
+
+	// Remove from items slice (find by SessionID)
+	for i, item := range m.items {
+		if item.conv.SessionID == conv.SessionID {
+			m.items = append(m.items[:i], m.items[i+1:]...)
+			break
+		}
+	}
+
+	// Adjust cursor
+	if len(m.filtered) == 0 {
+		m.cursor = 0
+	} else if m.cursor >= len(m.filtered) {
+		m.cursor = len(m.filtered) - 1
+	}
+	// Otherwise cursor stays at same position (shows next item)
+
+	// Exit confirmation mode
+	m.confirmDelete = false
+	m.errorMsg = ""
+}
+
 // buildItems creates list items from conversations
 func buildItems(conversations []Conversation) []listItem {
 	items := make([]listItem, 0, len(conversations))
@@ -769,6 +873,7 @@ Examples:
 Key bindings:
   ↑/↓, Ctrl+P/N   Navigate list
   Enter           Select and resume conversation
+  Ctrl+D          Delete conversation (with confirmation)
   Ctrl+J/K        Scroll preview
   Mouse wheel     Scroll list or preview (based on position)
   Ctrl+U          Clear search