fix: looks like we resolved the issues with pasting.

We means me and Claude (heavy on the Claude). Originally, if we copied a
many line segment into a charwise register, the paste op would error,
this is not right, it should paste, just differently.

README.md

@@ -56,6 +56,16 @@
 
 ---
 
+## Trade Offs
+
+#### Undo Tree vs. Undo Stack
+
+While the undo tree method that vim uses is powerful, I rarely find myself using it. A stack terminal-based
+approach is more natural to "non-vim" users and much simpler to implement. Implementing a feature similar
+to Vims undo tree would many times longer than a simple stack.
+
+---
+
 ## 🎯 Features
 
 ### 🎭 Six Editor Modes

internal/action/interface.go

@@ -108,3 +108,9 @@ type Resolvable interface {
 	Motion
 	Resolve(m Model) Motion
 }
+
+type TextObject interface {
+	// GetRange calculates both endpoints for the text object
+	// modifier: "i" (inner) or "a" (around)
+	GetRange(m Model, cursor core.Position, modifier string) (start, end core.Position, mtype core.MotionType)
+}

internal/action/paste.go

@@ -57,29 +57,56 @@ func (a Paste) Execute(m Model) tea.Cmd {
 		{
 			lines := reg.Content
 
-			// Shouldn't happen, just a check
-			if len(lines) != 1 {
-				out := core.CommandOutput{
-					Lines:   []string{"Charwise register should only have a single line of content."},
-					Inline:  true,
-					IsError: true,
-				}
-				m.SetCommandOutput(&out)
+			if len(lines) == 0 {
 				break
 			}
 
 			x := win.Cursor.Col
 			y := win.Cursor.Line
-
-			cnt := strings.Repeat(lines[0], max(1, a.Count))
 			curLine := buf.Lines[y]
-
-			// Catch edge cases, end of line, start of blank line
 			insertAt := min(x+1, len(curLine))
+
+			if len(lines) == 1 {
+				// Single-line charwise paste
+				cnt := strings.Repeat(lines[0], max(1, a.Count))
 				newLine := curLine[:insertAt] + cnt + curLine[insertAt:]
 				buf.SetLine(y, newLine)
-
 				win.SetCursorCol(x + len(cnt))
+			} else {
+				// Multi-line charwise paste (e.g., from vi{ yank)
+				suffix := curLine[insertAt:] // Save the part after cursor
+
+				// For count > 1, we paste the content multiple times
+				// Each paste continues from where the previous one ended
+				var content strings.Builder
+				for i := 0; i < a.Count; i++ {
+					for j, line := range lines {
+						if j > 0 {
+							content.WriteString("\n")
+						}
+						content.WriteString(line)
+					}
+				}
+
+				// Split the pasted content into lines
+				pastedLines := strings.Split(content.String(), "\n")
+
+				// First line: append to current line
+				buf.SetLine(y, curLine[:insertAt]+pastedLines[0])
+
+				// Middle lines: insert as new lines
+				for i := 1; i < len(pastedLines); i++ {
+					buf.InsertLine(y+i, pastedLines[i])
+				}
+
+				// Last line: append the suffix
+				lastLineIdx := y + len(pastedLines) - 1
+				buf.SetLine(lastLineIdx, buf.Lines[lastLineIdx]+suffix)
+
+				// Set cursor to end of last pasted content (before suffix)
+				win.SetCursorLine(lastLineIdx)
+				win.SetCursorCol(len(buf.Lines[lastLineIdx]) - len(suffix) - 1)
+			}
 		}
 	default:
 		out := core.CommandOutput{
@@ -142,29 +169,56 @@ func (a PasteBefore) Execute(m Model) tea.Cmd {
 		{
 			lines := reg.Content
 
-			// Shouldn't happen, just a check
-			if len(lines) != 1 {
-				out := core.CommandOutput{
-					Lines:   []string{"Charwise register should only have a single line of content."},
-					Inline:  true,
-					IsError: true,
-				}
-				m.SetCommandOutput(&out)
+			if len(lines) == 0 {
 				break
 			}
 
 			x := win.Cursor.Col
 			y := win.Cursor.Line
-
-			cnt := strings.Repeat(lines[0], max(1, a.Count))
 			curLine := buf.Lines[y]
-
-			// Catch edge cases, end of line, start of blank line
 			insertAt := min(x, len(curLine))
+
+			if len(lines) == 1 {
+				// Single-line charwise paste before cursor
+				cnt := strings.Repeat(lines[0], max(1, a.Count))
 				newLine := curLine[:insertAt] + cnt + curLine[insertAt:]
 				buf.SetLine(y, newLine)
-
 				win.SetCursorCol(x + len(cnt))
+			} else {
+				// Multi-line charwise paste before cursor
+				suffix := curLine[insertAt:] // Save the part after cursor
+
+				// For count > 1, we paste the content multiple times
+				// Each paste continues from where the previous one ended
+				var content strings.Builder
+				for i := 0; i < a.Count; i++ {
+					for j, line := range lines {
+						if j > 0 {
+							content.WriteString("\n")
+						}
+						content.WriteString(line)
+					}
+				}
+
+				// Split the pasted content into lines
+				pastedLines := strings.Split(content.String(), "\n")
+
+				// First line: insert at cursor position
+				buf.SetLine(y, curLine[:insertAt]+pastedLines[0])
+
+				// Middle lines: insert as new lines
+				for i := 1; i < len(pastedLines); i++ {
+					buf.InsertLine(y+i, pastedLines[i])
+				}
+
+				// Last line: append the suffix
+				lastLineIdx := y + len(pastedLines) - 1
+				buf.SetLine(lastLineIdx, buf.Lines[lastLineIdx]+suffix)
+
+				// Set cursor to end of last pasted content (before suffix)
+				win.SetCursorLine(lastLineIdx)
+				win.SetCursorCol(len(buf.Lines[lastLineIdx]) - len(suffix) - 1)
+			}
 		}
 	default:
 		out := core.CommandOutput{

internal/editor/integration_paste_test.go

@@ -821,37 +821,196 @@ func TestPasteBeforeCharwiseWithCount(t *testing.T) {
 }
 
 // =============================================================================
-// Multi-line Charwise Paste Tests (from visual mode yank)
+// Multi-line Charwise Paste Tests (from visual mode yank like vi{)
 // =============================================================================
 
 func TestPasteCharwiseMultiLine(t *testing.T) {
-	t.Run("p with multi-line charwise content errors gracefully", func(t *testing.T) {
+	t.Run("p with 2-line charwise content inserts correctly", func(t *testing.T) {
 		tm := newTestModel(t,
 			WithLines([]string{"hello"}),
-			WithCursorPos(core.Position{Line: 0, Col: 0}),
-			WithRegister('"', core.CharwiseRegister, []string{"line1", "line2"}),
+			WithCursorPos(core.Position{Line: 0, Col: 1}), // on 'e'
+			WithRegister('"', core.CharwiseRegister, []string{"AAA", "BBB"}),
 		)
 		sendKeys(tm, "p")
 
 		m := getFinalModel(t, tm)
-		// Current implementation errors - line should be unchanged
-		if m.ActiveBuffer().Lines[0] != "hello" {
-			t.Errorf("Line(0) = %q, want 'hello' (unchanged due to error)", m.ActiveBuffer().Lines[0])
+		// Should paste after 'e': "heAAA\nBBBllo"
+		if m.ActiveBuffer().LineCount() != 2 {
+			t.Errorf("LineCount() = %d, want 2", m.ActiveBuffer().LineCount())
+		}
+		if m.ActiveBuffer().Lines[0] != "heAAA" {
+			t.Errorf("Line(0) = %q, want 'heAAA'", m.ActiveBuffer().Lines[0])
+		}
+		if m.ActiveBuffer().Lines[1] != "BBBllo" {
+			t.Errorf("Line(1) = %q, want 'BBBllo'", m.ActiveBuffer().Lines[1])
 		}
 	})
 
-	t.Run("P with multi-line charwise content errors gracefully", func(t *testing.T) {
+	t.Run("p with 3-line charwise content inserts correctly", func(t *testing.T) {
+		tm := newTestModel(t,
+			WithLines([]string{"test"}),
+			WithCursorPos(core.Position{Line: 0, Col: 1}), // on 'e'
+			WithRegister('"', core.CharwiseRegister, []string{"AAA", "BBB", "CCC"}),
+		)
+		sendKeys(tm, "p")
+
+		m := getFinalModel(t, tm)
+		// Should paste: "teAAA\nBBB\nCCCst"
+		if m.ActiveBuffer().LineCount() != 3 {
+			t.Errorf("LineCount() = %d, want 3", m.ActiveBuffer().LineCount())
+		}
+		if m.ActiveBuffer().Lines[0] != "teAAA" {
+			t.Errorf("Line(0) = %q, want 'teAAA'", m.ActiveBuffer().Lines[0])
+		}
+		if m.ActiveBuffer().Lines[1] != "BBB" {
+			t.Errorf("Line(1) = %q, want 'BBB'", m.ActiveBuffer().Lines[1])
+		}
+		if m.ActiveBuffer().Lines[2] != "CCCst" {
+			t.Errorf("Line(2) = %q, want 'CCCst'", m.ActiveBuffer().Lines[2])
+		}
+	})
+
+	t.Run("p with multi-line at start of line", func(t *testing.T) {
 		tm := newTestModel(t,
 			WithLines([]string{"hello"}),
+			WithCursorPos(core.Position{Line: 0, Col: 0}), // on 'h'
+			WithRegister('"', core.CharwiseRegister, []string{"X", "Y"}),
+		)
+		sendKeys(tm, "p")
+
+		m := getFinalModel(t, tm)
+		// After 'h': "hX\nYello"
+		if m.ActiveBuffer().Lines[0] != "hX" {
+			t.Errorf("Line(0) = %q, want 'hX'", m.ActiveBuffer().Lines[0])
+		}
+		if m.ActiveBuffer().Lines[1] != "Yello" {
+			t.Errorf("Line(1) = %q, want 'Yello'", m.ActiveBuffer().Lines[1])
+		}
+	})
+
+	t.Run("p with multi-line at end of line", func(t *testing.T) {
+		tm := newTestModel(t,
+			WithLines([]string{"hello"}),
+			WithCursorPos(core.Position{Line: 0, Col: 4}), // on 'o'
+			WithRegister('"', core.CharwiseRegister, []string{"X", "Y"}),
+		)
+		sendKeys(tm, "p")
+
+		m := getFinalModel(t, tm)
+		// After 'o': "helloX\nY"
+		if m.ActiveBuffer().Lines[0] != "helloX" {
+			t.Errorf("Line(0) = %q, want 'helloX'", m.ActiveBuffer().Lines[0])
+		}
+		if m.ActiveBuffer().Lines[1] != "Y" {
+			t.Errorf("Line(1) = %q, want 'Y'", m.ActiveBuffer().Lines[1])
+		}
+	})
+
+	t.Run("p with multi-line on empty line", func(t *testing.T) {
+		tm := newTestModel(t,
+			WithLines([]string{""}),
 			WithCursorPos(core.Position{Line: 0, Col: 0}),
-			WithRegister('"', core.CharwiseRegister, []string{"line1", "line2"}),
+			WithRegister('"', core.CharwiseRegister, []string{"AAA", "BBB"}),
+		)
+		sendKeys(tm, "p")
+
+		m := getFinalModel(t, tm)
+		if m.ActiveBuffer().Lines[0] != "AAA" {
+			t.Errorf("Line(0) = %q, want 'AAA'", m.ActiveBuffer().Lines[0])
+		}
+		if m.ActiveBuffer().Lines[1] != "BBB" {
+			t.Errorf("Line(1) = %q, want 'BBB'", m.ActiveBuffer().Lines[1])
+		}
+	})
+
+	t.Run("P with multi-line charwise content before cursor", func(t *testing.T) {
+		tm := newTestModel(t,
+			WithLines([]string{"hello"}),
+			WithCursorPos(core.Position{Line: 0, Col: 2}), // on first 'l'
+			WithRegister('"', core.CharwiseRegister, []string{"X", "Y"}),
 		)
 		sendKeys(tm, "P")
 
 		m := getFinalModel(t, tm)
-		// Current implementation errors - line should be unchanged
-		if m.ActiveBuffer().Lines[0] != "hello" {
-			t.Errorf("Line(0) = %q, want 'hello' (unchanged due to error)", m.ActiveBuffer().Lines[0])
+		// Before 'l': "heX\nYllo"
+		if m.ActiveBuffer().Lines[0] != "heX" {
+			t.Errorf("Line(0) = %q, want 'heX'", m.ActiveBuffer().Lines[0])
+		}
+		if m.ActiveBuffer().Lines[1] != "Yllo" {
+			t.Errorf("Line(1) = %q, want 'Yllo'", m.ActiveBuffer().Lines[1])
+		}
+	})
+
+	t.Run("P with multi-line at start of line", func(t *testing.T) {
+		tm := newTestModel(t,
+			WithLines([]string{"hello"}),
+			WithCursorPos(core.Position{Line: 0, Col: 0}),
+			WithRegister('"', core.CharwiseRegister, []string{"X", "Y"}),
+		)
+		sendKeys(tm, "P")
+
+		m := getFinalModel(t, tm)
+		// Before 'h': "X\nYhello"
+		if m.ActiveBuffer().Lines[0] != "X" {
+			t.Errorf("Line(0) = %q, want 'X'", m.ActiveBuffer().Lines[0])
+		}
+		if m.ActiveBuffer().Lines[1] != "Yhello" {
+			t.Errorf("Line(1) = %q, want 'Yhello'", m.ActiveBuffer().Lines[1])
+		}
+	})
+
+	t.Run("p with multi-line and count", func(t *testing.T) {
+		tm := newTestModel(t,
+			WithLines([]string{"test"}),
+			WithCursorPos(core.Position{Line: 0, Col: 1}),
+			WithRegister('"', core.CharwiseRegister, []string{"A", "B"}),
+		)
+		sendKeys(tm, "2", "p")
+
+		m := getFinalModel(t, tm)
+		// 2p should paste twice: "teA\nBA\nBst"
+		if m.ActiveBuffer().LineCount() != 3 {
+			t.Errorf("LineCount() = %d, want 3", m.ActiveBuffer().LineCount())
+		}
+		if m.ActiveBuffer().Lines[0] != "teA" {
+			t.Errorf("Line(0) = %q, want 'teA'", m.ActiveBuffer().Lines[0])
+		}
+		if m.ActiveBuffer().Lines[1] != "BA" {
+			t.Errorf("Line(1) = %q, want 'BA'", m.ActiveBuffer().Lines[1])
+		}
+		if m.ActiveBuffer().Lines[2] != "Bst" {
+			t.Errorf("Line(2) = %q, want 'Bst'", m.ActiveBuffer().Lines[2])
+		}
+	})
+
+	t.Run("real world: vi{ then y then p", func(t *testing.T) {
+		tm := newTestModel(t,
+			WithLines([]string{
+				"function() {",
+				"    body",
+				"}",
+				"test",
+			}),
+			WithCursorPos(core.Position{Line: 1, Col: 0}),
+		)
+		// Yank the content inside braces
+		sendKeys(tm, "v", "i", "{", "y")
+		// Move to test line and paste
+		sendKeys(tm, "j", "j", "$", "p")
+
+		m := getFinalModel(t, tm)
+		// The yanked content should be multi-line charwise
+		reg, ok := m.GetRegister('"')
+		if !ok {
+			t.Fatal("register not found")
+		}
+		if reg.Type != core.CharwiseRegister {
+			t.Errorf("register type = %v, want CharwiseRegister", reg.Type)
+		}
+		// Should paste after 't' in "test"
+		// Depending on what vi{ yanks, this verifies multi-line paste works
+		if m.ActiveBuffer().LineCount() < 4 {
+			t.Errorf("LineCount() = %d, want at least 4", m.ActiveBuffer().LineCount())
 		}
 	})
 }

internal/editor/integration_textobject_test.go

@@ -0,0 +1,979 @@
+package editor
+
+import (
+	"testing"
+
+	"git.gophernest.net/azpect/TextEditor/internal/core"
+)
+
+// ============================================================================
+// Word Text Object Tests (iw/aw)
+// ============================================================================
+
+func TestTextObjectInnerWord(t *testing.T) {
+	t.Run("test 'viw' selects inner word", func(t *testing.T) {
+		lines := []string{"hello world"}
+		tm := newTestModelWithLinesAndCursorPos(t, lines, core.Position{Col: 2, Line: 0})
+		sendKeys(tm, "v", "i", "w")
+
+		m := getFinalModel(t, tm)
+		if !m.Mode().IsVisualMode() {
+			t.Errorf("Expected visual mode")
+		}
+		// Should select "hello" (cols 0-4)
+		if m.ActiveWindow().Anchor.Col != 0 || m.ActiveWindow().Cursor.Col != 4 {
+			t.Errorf("anchor=%d, cursor=%d, want anchor=0, cursor=4",
+				m.ActiveWindow().Anchor.Col, m.ActiveWindow().Cursor.Col)
+		}
+	})
+
+	t.Run("test 'diw' deletes inner word", func(t *testing.T) {
+		lines := []string{"hello world"}
+		tm := newTestModelWithLinesAndCursorPos(t, lines, core.Position{Col: 2, Line: 0})
+		sendKeys(tm, "d", "i", "w")
+
+		m := getFinalModel(t, tm)
+		if m.ActiveBuffer().Lines[0] != " world" {
+			t.Errorf("lines[0] = %q, want ' world'", m.ActiveBuffer().Lines[0])
+		}
+	})
+
+	t.Run("test 'ciw' changes inner word", func(t *testing.T) {
+		lines := []string{"hello world"}
+		tm := newTestModelWithLinesAndCursorPos(t, lines, core.Position{Col: 2, Line: 0})
+		sendKeys(tm, "c", "i", "w")
+
+		m := getFinalModel(t, tm)
+		if m.ActiveBuffer().Lines[0] != " world" {
+			t.Errorf("lines[0] = %q, want ' world'", m.ActiveBuffer().Lines[0])
+		}
+		if m.Mode() != core.InsertMode {
+			t.Errorf("Expected insert mode after ciw")
+		}
+	})
+
+	t.Run("test 'yiw' yanks inner word", func(t *testing.T) {
+		lines := []string{"hello world"}
+		tm := newTestModelWithLinesAndCursorPos(t, lines, core.Position{Col: 2, Line: 0})
+		sendKeys(tm, "y", "i", "w")
+
+		m := getFinalModel(t, tm)
+		reg, ok := m.GetRegister('"')
+		if !ok {
+			t.Fatalf("Default register not found")
+		}
+		if len(reg.Content) != 1 || reg.Content[0] != "hello" {
+			t.Errorf("register content = %v, want ['hello']", reg.Content)
+		}
+	})
+
+	t.Run("test 'viw' at start of word", func(t *testing.T) {
+		lines := []string{"hello world"}
+		tm := newTestModelWithLinesAndCursorPos(t, lines, core.Position{Col: 0, Line: 0})
+		sendKeys(tm, "v", "i", "w")
+
+		m := getFinalModel(t, tm)
+		if m.ActiveWindow().Anchor.Col != 0 || m.ActiveWindow().Cursor.Col != 4 {
+			t.Errorf("anchor=%d, cursor=%d, want anchor=0, cursor=4",
+				m.ActiveWindow().Anchor.Col, m.ActiveWindow().Cursor.Col)
+		}
+	})
+
+	t.Run("test 'viw' at end of word", func(t *testing.T) {
+		lines := []string{"hello world"}
+		tm := newTestModelWithLinesAndCursorPos(t, lines, core.Position{Col: 4, Line: 0})
+		sendKeys(tm, "v", "i", "w")
+
+		m := getFinalModel(t, tm)
+		if m.ActiveWindow().Anchor.Col != 0 || m.ActiveWindow().Cursor.Col != 4 {
+			t.Errorf("anchor=%d, cursor=%d, want anchor=0, cursor=4",
+				m.ActiveWindow().Anchor.Col, m.ActiveWindow().Cursor.Col)
+		}
+	})
+
+	t.Run("test 'viw' on underscore word", func(t *testing.T) {
+		lines := []string{"hello_world test"}
+		tm := newTestModelWithLinesAndCursorPos(t, lines, core.Position{Col: 7, Line: 0})
+		sendKeys(tm, "v", "i", "w")
+
+		m := getFinalModel(t, tm)
+		// Should select "hello_world" (cols 0-10)
+		if m.ActiveWindow().Anchor.Col != 0 || m.ActiveWindow().Cursor.Col != 10 {
+			t.Errorf("anchor=%d, cursor=%d, want anchor=0, cursor=10",
+				m.ActiveWindow().Anchor.Col, m.ActiveWindow().Cursor.Col)
+		}
+	})
+
+	t.Run("test 'viw' on punctuation", func(t *testing.T) {
+		lines := []string{"foo-bar baz"}
+		tm := newTestModelWithLinesAndCursorPos(t, lines, core.Position{Col: 3, Line: 0})
+		sendKeys(tm, "v", "i", "w")
+
+		m := getFinalModel(t, tm)
+		// Should select just "-" (col 3)
+		if m.ActiveWindow().Anchor.Col != 3 || m.ActiveWindow().Cursor.Col != 3 {
+			t.Errorf("anchor=%d, cursor=%d, want anchor=3, cursor=3",
+				m.ActiveWindow().Anchor.Col, m.ActiveWindow().Cursor.Col)
+		}
+	})
+}
+
+func TestTextObjectAroundWord(t *testing.T) {
+	t.Run("test 'vaw' selects around word with trailing space", func(t *testing.T) {
+		lines := []string{"hello world"}
+		tm := newTestModelWithLinesAndCursorPos(t, lines, core.Position{Col: 2, Line: 0})
+		sendKeys(tm, "v", "a", "w")
+
+		m := getFinalModel(t, tm)
+		// Should select "hello " (cols 0-5, includes trailing space)
+		if m.ActiveWindow().Anchor.Col != 0 || m.ActiveWindow().Cursor.Col != 5 {
+			t.Errorf("anchor=%d, cursor=%d, want anchor=0, cursor=5",
+				m.ActiveWindow().Anchor.Col, m.ActiveWindow().Cursor.Col)
+		}
+	})
+
+	t.Run("test 'daw' deletes around word", func(t *testing.T) {
+		lines := []string{"hello world"}
+		tm := newTestModelWithLinesAndCursorPos(t, lines, core.Position{Col: 2, Line: 0})
+		sendKeys(tm, "d", "a", "w")
+
+		m := getFinalModel(t, tm)
+		if m.ActiveBuffer().Lines[0] != "world" {
+			t.Errorf("lines[0] = %q, want 'world'", m.ActiveBuffer().Lines[0])
+		}
+	})
+
+	t.Run("test 'daw' on last word (no trailing space)", func(t *testing.T) {
+		lines := []string{"hello world"}
+		tm := newTestModelWithLinesAndCursorPos(t, lines, core.Position{Col: 7, Line: 0})
+		sendKeys(tm, "d", "a", "w")
+
+		m := getFinalModel(t, tm)
+		if m.ActiveBuffer().Lines[0] != "hello " {
+			t.Errorf("lines[0] = %q, want 'hello '", m.ActiveBuffer().Lines[0])
+		}
+	})
+}
+
+// ============================================================================
+// WORD Text Object Tests (iW/aW)
+// ============================================================================
+
+func TestTextObjectInnerWORD(t *testing.T) {
+	t.Run("test 'viW' selects inner WORD", func(t *testing.T) {
+		lines := []string{"foo-bar baz"}
+		tm := newTestModelWithLinesAndCursorPos(t, lines, core.Position{Col: 2, Line: 0})
+		sendKeys(tm, "v", "i", "W")
+
+		m := getFinalModel(t, tm)
+		// Should select "foo-bar" (cols 0-6)
+		if m.ActiveWindow().Anchor.Col != 0 || m.ActiveWindow().Cursor.Col != 6 {
+			t.Errorf("anchor=%d, cursor=%d, want anchor=0, cursor=6",
+				m.ActiveWindow().Anchor.Col, m.ActiveWindow().Cursor.Col)
+		}
+	})
+
+	t.Run("test 'diW' deletes inner WORD", func(t *testing.T) {
+		lines := []string{"foo-bar.baz test"}
+		tm := newTestModelWithLinesAndCursorPos(t, lines, core.Position{Col: 5, Line: 0})
+		sendKeys(tm, "d", "i", "W")
+
+		m := getFinalModel(t, tm)
+		if m.ActiveBuffer().Lines[0] != " test" {
+			t.Errorf("lines[0] = %q, want ' test'", m.ActiveBuffer().Lines[0])
+		}
+	})
+}
+
+func TestTextObjectAroundWORD(t *testing.T) {
+	t.Run("test 'vaW' selects around WORD with trailing space", func(t *testing.T) {
+		lines := []string{"foo-bar baz"}
+		tm := newTestModelWithLinesAndCursorPos(t, lines, core.Position{Col: 2, Line: 0})
+		sendKeys(tm, "v", "a", "W")
+
+		m := getFinalModel(t, tm)
+		// Should select "foo-bar " (cols 0-7, includes trailing space)
+		if m.ActiveWindow().Anchor.Col != 0 || m.ActiveWindow().Cursor.Col != 7 {
+			t.Errorf("anchor=%d, cursor=%d, want anchor=0, cursor=7",
+				m.ActiveWindow().Anchor.Col, m.ActiveWindow().Cursor.Col)
+		}
+	})
+
+	t.Run("test 'daW' deletes around WORD", func(t *testing.T) {
+		lines := []string{"foo-bar baz"}
+		tm := newTestModelWithLinesAndCursorPos(t, lines, core.Position{Col: 2, Line: 0})
+		sendKeys(tm, "d", "a", "W")
+
+		m := getFinalModel(t, tm)
+		if m.ActiveBuffer().Lines[0] != "baz" {
+			t.Errorf("lines[0] = %q, want 'baz'", m.ActiveBuffer().Lines[0])
+		}
+	})
+}
+
+// ============================================================================
+// Delimiter Text Object Tests (i</a<, i(/a(, etc.)
+// ============================================================================
+
+func TestTextObjectAngleBrackets(t *testing.T) {
+	t.Run("test 'vi<' selects inner angle brackets", func(t *testing.T) {
+		lines := []string{"<hello>"}
+		tm := newTestModelWithLinesAndCursorPos(t, lines, core.Position{Col: 3, Line: 0})
+		sendKeys(tm, "v", "i", "<")
+
+		m := getFinalModel(t, tm)
+		// Should select "hello" (cols 1-5)
+		if m.ActiveWindow().Anchor.Col != 1 || m.ActiveWindow().Cursor.Col != 5 {
+			t.Errorf("anchor=%d, cursor=%d, want anchor=1, cursor=5",
+				m.ActiveWindow().Anchor.Col, m.ActiveWindow().Cursor.Col)
+		}
+	})
+
+	t.Run("test 'vi>' works same as 'vi<'", func(t *testing.T) {
+		lines := []string{"<hello>"}
+		tm := newTestModelWithLinesAndCursorPos(t, lines, core.Position{Col: 3, Line: 0})
+		sendKeys(tm, "v", "i", ">")
+
+		m := getFinalModel(t, tm)
+		// Should select "hello" (cols 1-5)
+		if m.ActiveWindow().Anchor.Col != 1 || m.ActiveWindow().Cursor.Col != 5 {
+			t.Errorf("anchor=%d, cursor=%d, want anchor=1, cursor=5",
+				m.ActiveWindow().Anchor.Col, m.ActiveWindow().Cursor.Col)
+		}
+	})
+
+	t.Run("test 'di<' deletes inner angle brackets", func(t *testing.T) {
+		lines := []string{"<hello>"}
+		tm := newTestModelWithLinesAndCursorPos(t, lines, core.Position{Col: 3, Line: 0})
+		sendKeys(tm, "d", "i", "<")
+
+		m := getFinalModel(t, tm)
+		if m.ActiveBuffer().Lines[0] != "<>" {
+			t.Errorf("lines[0] = %q, want '<>'", m.ActiveBuffer().Lines[0])
+		}
+	})
+
+	t.Run("test 'da<' deletes around angle brackets", func(t *testing.T) {
+		lines := []string{"<hello>"}
+		tm := newTestModelWithLinesAndCursorPos(t, lines, core.Position{Col: 3, Line: 0})
+		sendKeys(tm, "d", "a", "<")
+
+		m := getFinalModel(t, tm)
+		if m.ActiveBuffer().Lines[0] != "" {
+			t.Errorf("lines[0] = %q, want ''", m.ActiveBuffer().Lines[0])
+		}
+	})
+
+	t.Run("test 'vi<' on empty brackets does nothing", func(t *testing.T) {
+		lines := []string{"<>"}
+		tm := newTestModelWithLinesAndCursorPos(t, lines, core.Position{Col: 0, Line: 0})
+		sendKeys(tm, "d", "i", "<")
+
+		m := getFinalModel(t, tm)
+		// Should remain unchanged
+		if m.ActiveBuffer().Lines[0] != "<>" {
+			t.Errorf("lines[0] = %q, want '<>'", m.ActiveBuffer().Lines[0])
+		}
+	})
+
+	t.Run("test 'vi<' in nested brackets", func(t *testing.T) {
+		lines := []string{"<foo<bar>>"}
+		tm := newTestModelWithLinesAndCursorPos(t, lines, core.Position{Col: 5, Line: 0})
+		sendKeys(tm, "v", "i", "<")
+
+		m := getFinalModel(t, tm)
+		// Should select "bar" (cols 5-7, the innermost pair)
+		if m.ActiveWindow().Anchor.Col != 5 || m.ActiveWindow().Cursor.Col != 7 {
+			t.Errorf("anchor=%d, cursor=%d, want anchor=5, cursor=7",
+				m.ActiveWindow().Anchor.Col, m.ActiveWindow().Cursor.Col)
+		}
+	})
+}
+
+func TestTextObjectParentheses(t *testing.T) {
+	t.Run("test 'vi(' selects inner parentheses", func(t *testing.T) {
+		lines := []string{"(hello)"}
+		tm := newTestModelWithLinesAndCursorPos(t, lines, core.Position{Col: 3, Line: 0})
+		sendKeys(tm, "v", "i", "(")
+
+		m := getFinalModel(t, tm)
+		if m.ActiveWindow().Anchor.Col != 1 || m.ActiveWindow().Cursor.Col != 5 {
+			t.Errorf("anchor=%d, cursor=%d, want anchor=1, cursor=5",
+				m.ActiveWindow().Anchor.Col, m.ActiveWindow().Cursor.Col)
+		}
+	})
+
+	t.Run("test 'vi)' works same as 'vi('", func(t *testing.T) {
+		lines := []string{"(hello)"}
+		tm := newTestModelWithLinesAndCursorPos(t, lines, core.Position{Col: 3, Line: 0})
+		sendKeys(tm, "v", "i", ")")
+
+		m := getFinalModel(t, tm)
+		if m.ActiveWindow().Anchor.Col != 1 || m.ActiveWindow().Cursor.Col != 5 {
+			t.Errorf("anchor=%d, cursor=%d, want anchor=1, cursor=5",
+				m.ActiveWindow().Anchor.Col, m.ActiveWindow().Cursor.Col)
+		}
+	})
+
+	t.Run("test 'di(' deletes inner parentheses", func(t *testing.T) {
+		lines := []string{"func(hello)"}
+		tm := newTestModelWithLinesAndCursorPos(t, lines, core.Position{Col: 7, Line: 0})
+		sendKeys(tm, "d", "i", "(")
+
+		m := getFinalModel(t, tm)
+		if m.ActiveBuffer().Lines[0] != "func()" {
+			t.Errorf("lines[0] = %q, want 'func()'", m.ActiveBuffer().Lines[0])
+		}
+	})
+
+	t.Run("test 'da(' deletes around parentheses", func(t *testing.T) {
+		lines := []string{"func(hello)"}
+		tm := newTestModelWithLinesAndCursorPos(t, lines, core.Position{Col: 7, Line: 0})
+		sendKeys(tm, "d", "a", "(")
+
+		m := getFinalModel(t, tm)
+		if m.ActiveBuffer().Lines[0] != "func" {
+			t.Errorf("lines[0] = %q, want 'func'", m.ActiveBuffer().Lines[0])
+		}
+	})
+
+	t.Run("test 'vi(' on empty parens does nothing", func(t *testing.T) {
+		lines := []string{"()"}
+		tm := newTestModelWithLinesAndCursorPos(t, lines, core.Position{Col: 0, Line: 0})
+		sendKeys(tm, "d", "i", "(")
+
+		m := getFinalModel(t, tm)
+		if m.ActiveBuffer().Lines[0] != "()" {
+			t.Errorf("lines[0] = %q, want '()'", m.ActiveBuffer().Lines[0])
+		}
+	})
+}
+
+func TestTextObjectBraces(t *testing.T) {
+	t.Run("test 'vi{' selects inner braces", func(t *testing.T) {
+		lines := []string{"{hello}"}
+		tm := newTestModelWithLinesAndCursorPos(t, lines, core.Position{Col: 3, Line: 0})
+		sendKeys(tm, "v", "i", "{")
+
+		m := getFinalModel(t, tm)
+		if m.ActiveWindow().Anchor.Col != 1 || m.ActiveWindow().Cursor.Col != 5 {
+			t.Errorf("anchor=%d, cursor=%d, want anchor=1, cursor=5",
+				m.ActiveWindow().Anchor.Col, m.ActiveWindow().Cursor.Col)
+		}
+	})
+
+	t.Run("test 'di{' deletes inner braces", func(t *testing.T) {
+		lines := []string{"{hello}"}
+		tm := newTestModelWithLinesAndCursorPos(t, lines, core.Position{Col: 3, Line: 0})
+		sendKeys(tm, "d", "i", "{")
+
+		m := getFinalModel(t, tm)
+		if m.ActiveBuffer().Lines[0] != "{}" {
+			t.Errorf("lines[0] = %q, want '{}'", m.ActiveBuffer().Lines[0])
+		}
+	})
+
+	t.Run("test 'da{' deletes around braces", func(t *testing.T) {
+		lines := []string{"{hello}"}
+		tm := newTestModelWithLinesAndCursorPos(t, lines, core.Position{Col: 3, Line: 0})
+		sendKeys(tm, "d", "a", "{")
+
+		m := getFinalModel(t, tm)
+		if m.ActiveBuffer().Lines[0] != "" {
+			t.Errorf("lines[0] = %q, want ''", m.ActiveBuffer().Lines[0])
+		}
+	})
+}
+
+func TestTextObjectBrackets(t *testing.T) {
+	t.Run("test 'vi[' selects inner brackets", func(t *testing.T) {
+		lines := []string{"[hello]"}
+		tm := newTestModelWithLinesAndCursorPos(t, lines, core.Position{Col: 3, Line: 0})
+		sendKeys(tm, "v", "i", "[")
+
+		m := getFinalModel(t, tm)
+		if m.ActiveWindow().Anchor.Col != 1 || m.ActiveWindow().Cursor.Col != 5 {
+			t.Errorf("anchor=%d, cursor=%d, want anchor=1, cursor=5",
+				m.ActiveWindow().Anchor.Col, m.ActiveWindow().Cursor.Col)
+		}
+	})
+
+	t.Run("test 'di[' deletes inner brackets", func(t *testing.T) {
+		lines := []string{"[hello]"}
+		tm := newTestModelWithLinesAndCursorPos(t, lines, core.Position{Col: 3, Line: 0})
+		sendKeys(tm, "d", "i", "[")
+
+		m := getFinalModel(t, tm)
+		if m.ActiveBuffer().Lines[0] != "[]" {
+			t.Errorf("lines[0] = %q, want '[]'", m.ActiveBuffer().Lines[0])
+		}
+	})
+
+	t.Run("test 'da[' deletes around brackets", func(t *testing.T) {
+		lines := []string{"[hello]"}
+		tm := newTestModelWithLinesAndCursorPos(t, lines, core.Position{Col: 3, Line: 0})
+		sendKeys(tm, "d", "a", "[")
+
+		m := getFinalModel(t, tm)
+		if m.ActiveBuffer().Lines[0] != "" {
+			t.Errorf("lines[0] = %q, want ''", m.ActiveBuffer().Lines[0])
+		}
+	})
+}
+
+func TestTextObjectDoubleQuotes(t *testing.T) {
+	t.Run("test 'vi\"' selects inner double quotes", func(t *testing.T) {
+		lines := []string{`"hello"`}
+		tm := newTestModelWithLinesAndCursorPos(t, lines, core.Position{Col: 3, Line: 0})
+		sendKeys(tm, "v", "i", `"`)
+
+		m := getFinalModel(t, tm)
+		if m.ActiveWindow().Anchor.Col != 1 || m.ActiveWindow().Cursor.Col != 5 {
+			t.Errorf("anchor=%d, cursor=%d, want anchor=1, cursor=5",
+				m.ActiveWindow().Anchor.Col, m.ActiveWindow().Cursor.Col)
+		}
+	})
+
+	t.Run("test 'di\"' deletes inner double quotes", func(t *testing.T) {
+		lines := []string{`"hello"`}
+		tm := newTestModelWithLinesAndCursorPos(t, lines, core.Position{Col: 3, Line: 0})
+		sendKeys(tm, "d", "i", `"`)
+
+		m := getFinalModel(t, tm)
+		if m.ActiveBuffer().Lines[0] != `""` {
+			t.Errorf("lines[0] = %q, want '\"\"'", m.ActiveBuffer().Lines[0])
+		}
+	})
+
+	t.Run("test 'da\"' deletes around double quotes", func(t *testing.T) {
+		lines := []string{`"hello"`}
+		tm := newTestModelWithLinesAndCursorPos(t, lines, core.Position{Col: 3, Line: 0})
+		sendKeys(tm, "d", "a", `"`)
+
+		m := getFinalModel(t, tm)
+		if m.ActiveBuffer().Lines[0] != "" {
+			t.Errorf("lines[0] = %q, want ''", m.ActiveBuffer().Lines[0])
+		}
+	})
+
+	t.Run("test 'vi\"' on empty quotes does nothing", func(t *testing.T) {
+		lines := []string{`""`}
+		tm := newTestModelWithLinesAndCursorPos(t, lines, core.Position{Col: 0, Line: 0})
+		sendKeys(tm, "d", "i", `"`)
+
+		m := getFinalModel(t, tm)
+		if m.ActiveBuffer().Lines[0] != `""` {
+			t.Errorf("lines[0] = %q, want '\"\"'", m.ActiveBuffer().Lines[0])
+		}
+	})
+}
+
+func TestTextObjectSingleQuotes(t *testing.T) {
+	t.Run("test 'vi'' selects inner single quotes", func(t *testing.T) {
+		lines := []string{"'hello'"}
+		tm := newTestModelWithLinesAndCursorPos(t, lines, core.Position{Col: 3, Line: 0})
+		sendKeys(tm, "v", "i", "'")
+
+		m := getFinalModel(t, tm)
+		if m.ActiveWindow().Anchor.Col != 1 || m.ActiveWindow().Cursor.Col != 5 {
+			t.Errorf("anchor=%d, cursor=%d, want anchor=1, cursor=5",
+				m.ActiveWindow().Anchor.Col, m.ActiveWindow().Cursor.Col)
+		}
+	})
+
+	t.Run("test 'di'' deletes inner single quotes", func(t *testing.T) {
+		lines := []string{"'hello'"}
+		tm := newTestModelWithLinesAndCursorPos(t, lines, core.Position{Col: 3, Line: 0})
+		sendKeys(tm, "d", "i", "'")
+
+		m := getFinalModel(t, tm)
+		if m.ActiveBuffer().Lines[0] != "''" {
+			t.Errorf("lines[0] = %q, want \"''\"", m.ActiveBuffer().Lines[0])
+		}
+	})
+
+	t.Run("test 'da'' deletes around single quotes", func(t *testing.T) {
+		lines := []string{"'hello'"}
+		tm := newTestModelWithLinesAndCursorPos(t, lines, core.Position{Col: 3, Line: 0})
+		sendKeys(tm, "d", "a", "'")
+
+		m := getFinalModel(t, tm)
+		if m.ActiveBuffer().Lines[0] != "" {
+			t.Errorf("lines[0] = %q, want ''", m.ActiveBuffer().Lines[0])
+		}
+	})
+}
+
+func TestTextObjectBackticks(t *testing.T) {
+	t.Run("test 'vi`' selects inner backticks", func(t *testing.T) {
+		lines := []string{"`hello`"}
+		tm := newTestModelWithLinesAndCursorPos(t, lines, core.Position{Col: 3, Line: 0})
+		sendKeys(tm, "v", "i", "`")
+
+		m := getFinalModel(t, tm)
+		if m.ActiveWindow().Anchor.Col != 1 || m.ActiveWindow().Cursor.Col != 5 {
+			t.Errorf("anchor=%d, cursor=%d, want anchor=1, cursor=5",
+				m.ActiveWindow().Anchor.Col, m.ActiveWindow().Cursor.Col)
+		}
+	})
+
+	t.Run("test 'di`' deletes inner backticks", func(t *testing.T) {
+		lines := []string{"`hello`"}
+		tm := newTestModelWithLinesAndCursorPos(t, lines, core.Position{Col: 3, Line: 0})
+		sendKeys(tm, "d", "i", "`")
+
+		m := getFinalModel(t, tm)
+		if m.ActiveBuffer().Lines[0] != "``" {
+			t.Errorf("lines[0] = %q, want '``'", m.ActiveBuffer().Lines[0])
+		}
+	})
+
+	t.Run("test 'da`' deletes around backticks", func(t *testing.T) {
+		lines := []string{"`hello`"}
+		tm := newTestModelWithLinesAndCursorPos(t, lines, core.Position{Col: 3, Line: 0})
+		sendKeys(tm, "d", "a", "`")
+
+		m := getFinalModel(t, tm)
+		if m.ActiveBuffer().Lines[0] != "" {
+			t.Errorf("lines[0] = %q, want ''", m.ActiveBuffer().Lines[0])
+		}
+	})
+}
+
+// ============================================================================
+// Edge Cases and Complex Scenarios
+// ============================================================================
+
+func TestTextObjectEdgeCases(t *testing.T) {
+	t.Run("test 'diw' on single character word", func(t *testing.T) {
+		lines := []string{"a b c"}
+		tm := newTestModelWithLinesAndCursorPos(t, lines, core.Position{Col: 0, Line: 0})
+		sendKeys(tm, "d", "i", "w")
+
+		m := getFinalModel(t, tm)
+		if m.ActiveBuffer().Lines[0] != " b c" {
+			t.Errorf("lines[0] = %q, want ' b c'", m.ActiveBuffer().Lines[0])
+		}
+	})
+
+	t.Run("test 'ci<' then type replacement", func(t *testing.T) {
+		lines := []string{"<hello>"}
+		tm := newTestModelWithLinesAndCursorPos(t, lines, core.Position{Col: 3, Line: 0})
+		sendKeys(tm, "c", "i", "<")
+		sendKeyString(tm, "world")
+		sendKeys(tm, "esc")
+
+		m := getFinalModel(t, tm)
+		if m.ActiveBuffer().Lines[0] != "<world>" {
+			t.Errorf("lines[0] = %q, want '<world>'", m.ActiveBuffer().Lines[0])
+		}
+	})
+
+	t.Run("test 'yi(' then paste", func(t *testing.T) {
+		lines := []string{"func(arg)", "test"}
+		tm := newTestModelWithLinesAndCursorPos(t, lines, core.Position{Col: 6, Line: 0})
+		sendKeys(tm, "y", "i", "(")
+		sendKeys(tm, "j", "p")
+
+		m := getFinalModel(t, tm)
+		// 'p' pastes after cursor, so "arg" is pasted after 't' -> "testarg"
+		if m.ActiveBuffer().Lines[1] != "testarg" {
+			t.Errorf("lines[1] = %q, want 'testarg'", m.ActiveBuffer().Lines[1])
+		}
+	})
+
+	t.Run("test text object cursor after delimiters does nothing", func(t *testing.T) {
+		lines := []string{"before (hello) after"}
+		tm := newTestModelWithLinesAndCursorPos(t, lines, core.Position{Col: 15, Line: 0})
+		sendKeys(tm, "d", "i", "(")
+
+		m := getFinalModel(t, tm)
+		// Should remain unchanged since cursor is not inside parens
+		if m.ActiveBuffer().Lines[0] != "before (hello) after" {
+			t.Errorf("lines[0] = %q, want 'before (hello) after'", m.ActiveBuffer().Lines[0])
+		}
+	})
+
+	t.Run("test text object cursor before delimiters selects inside", func(t *testing.T) {
+		lines := []string{"before (hello) after"}
+		tm := newTestModelWithLinesAndCursorPos(t, lines, core.Position{Col: 0, Line: 0})
+		sendKeys(tm, "d", "i", "(")
+
+		m := getFinalModel(t, tm)
+		if m.ActiveBuffer().Lines[0] != "before () after" {
+			t.Errorf("lines[0] = %q, want 'before () after'", m.ActiveBuffer().Lines[0])
+		}
+	})
+
+	t.Run("test text object cursor before delimiters with 'a' modifier", func(t *testing.T) {
+		lines := []string{"before (hello) after"}
+		tm := newTestModelWithLinesAndCursorPos(t, lines, core.Position{Col: 0, Line: 0})
+		sendKeys(tm, "d", "a", "(")
+
+		m := getFinalModel(t, tm)
+		// 'a' should delete including the delimiters
+		if m.ActiveBuffer().Lines[0] != "before  after" {
+			t.Errorf("lines[0] = %q, want 'before  after'", m.ActiveBuffer().Lines[0])
+		}
+	})
+
+	t.Run("test text object cursor on opening delimiter", func(t *testing.T) {
+		lines := []string{"text (hello) more"}
+		tm := newTestModelWithLinesAndCursorPos(t, lines, core.Position{Col: 5, Line: 0})
+		sendKeys(tm, "d", "i", "(")
+
+		m := getFinalModel(t, tm)
+		// Cursor on '(' at position 5, should still select inside
+		if m.ActiveBuffer().Lines[0] != "text () more" {
+			t.Errorf("lines[0] = %q, want 'text () more'", m.ActiveBuffer().Lines[0])
+		}
+	})
+
+	t.Run("test text object cursor on closing delimiter", func(t *testing.T) {
+		lines := []string{"text (hello) more"}
+		// "text (hello) more"
+		//  01234567891011 <- ')' is at position 11
+		tm := newTestModelWithLinesAndCursorPos(t, lines, core.Position{Col: 11, Line: 0})
+		sendKeys(tm, "d", "i", "(")
+
+		m := getFinalModel(t, tm)
+		// Cursor on ')', should still select inside
+		if m.ActiveBuffer().Lines[0] != "text () more" {
+			t.Errorf("lines[0] = %q, want 'text () more'", m.ActiveBuffer().Lines[0])
+		}
+	})
+
+	t.Run("test multiple delimiter pairs - cursor before first", func(t *testing.T) {
+		lines := []string{"(foo) bar (baz)"}
+		tm := newTestModelWithLinesAndCursorPos(t, lines, core.Position{Col: 0, Line: 0})
+		sendKeys(tm, "d", "i", "(")
+
+		m := getFinalModel(t, tm)
+		// Should select the first pair it finds
+		if m.ActiveBuffer().Lines[0] != "() bar (baz)" {
+			t.Errorf("lines[0] = %q, want '() bar (baz)'", m.ActiveBuffer().Lines[0])
+		}
+	})
+
+	t.Run("test multiple delimiter pairs - cursor between pairs", func(t *testing.T) {
+		lines := []string{"(foo) bar (baz)"}
+		// Cursor on 'b' in "bar"
+		tm := newTestModelWithLinesAndCursorPos(t, lines, core.Position{Col: 6, Line: 0})
+		sendKeys(tm, "d", "i", "(")
+
+		m := getFinalModel(t, tm)
+		// Should search forward and find the second pair
+		if m.ActiveBuffer().Lines[0] != "(foo) bar ()" {
+			t.Errorf("lines[0] = %q, want '(foo) bar ()'", m.ActiveBuffer().Lines[0])
+		}
+	})
+
+	t.Run("test multiple delimiter pairs - cursor inside first", func(t *testing.T) {
+		lines := []string{"(foo) bar (baz)"}
+		// Cursor on 'o' in "foo"
+		tm := newTestModelWithLinesAndCursorPos(t, lines, core.Position{Col: 2, Line: 0})
+		sendKeys(tm, "d", "i", "(")
+
+		m := getFinalModel(t, tm)
+		// Should select the first pair since cursor is inside it
+		if m.ActiveBuffer().Lines[0] != "() bar (baz)" {
+			t.Errorf("lines[0] = %q, want '() bar (baz)'", m.ActiveBuffer().Lines[0])
+		}
+	})
+
+	t.Run("test multiple quoted strings - cursor before first", func(t *testing.T) {
+		lines := []string{`foo "bar" baz "qux"`}
+		tm := newTestModelWithLinesAndCursorPos(t, lines, core.Position{Col: 0, Line: 0})
+		sendKeys(tm, "d", "i", `"`)
+
+		m := getFinalModel(t, tm)
+		// Should find and select first quoted string
+		if m.ActiveBuffer().Lines[0] != `foo "" baz "qux"` {
+			t.Errorf("lines[0] = %q, want 'foo \"\" baz \"qux\"'", m.ActiveBuffer().Lines[0])
+		}
+	})
+
+	t.Run("test multiple quoted strings - cursor between pairs", func(t *testing.T) {
+		lines := []string{`"foo" bar "baz"`}
+		// Cursor on 'b' in "bar"
+		tm := newTestModelWithLinesAndCursorPos(t, lines, core.Position{Col: 6, Line: 0})
+		sendKeys(tm, "d", "i", `"`)
+
+		m := getFinalModel(t, tm)
+		// Should search forward and find second string
+		if m.ActiveBuffer().Lines[0] != `"foo" bar ""` {
+			t.Errorf("lines[0] = %q, want '\"foo\" bar \"\"'", m.ActiveBuffer().Lines[0])
+		}
+	})
+}
+
+// ============================================================================
+// Multi-line Delimiter Tests
+// ============================================================================
+
+func TestTextObjectMultiLineDelimiters(t *testing.T) {
+	t.Run("test 'di{' on multi-line braces", func(t *testing.T) {
+		lines := []string{
+			"func test() {",
+			"    body",
+			"}",
+		}
+		// Cursor on "body"
+		tm := newTestModelWithLinesAndCursorPos(t, lines, core.Position{Col: 4, Line: 1})
+		sendKeys(tm, "d", "i", "{")
+
+		m := getFinalModel(t, tm)
+		expected := []string{
+			"func test() {",
+			"}",
+		}
+		if !slicesEqual(m.ActiveBuffer().Lines, expected) {
+			t.Errorf("lines = %v, want %v", m.ActiveBuffer().Lines, expected)
+		}
+	})
+
+	t.Run("test 'da{' on multi-line braces", func(t *testing.T) {
+		lines := []string{
+			"func test() {",
+			"    body",
+			"}",
+		}
+		// Cursor on "body"
+		tm := newTestModelWithLinesAndCursorPos(t, lines, core.Position{Col: 4, Line: 1})
+		sendKeys(tm, "d", "a", "{")
+
+		m := getFinalModel(t, tm)
+		expected := []string{
+			"func test() ",
+		}
+		if !slicesEqual(m.ActiveBuffer().Lines, expected) {
+			t.Errorf("lines = %v, want %v", m.ActiveBuffer().Lines, expected)
+		}
+	})
+
+	t.Run("test 'vi(' on multi-line parentheses", func(t *testing.T) {
+		lines := []string{
+			"function(",
+			"    arg1,",
+			"    arg2",
+			")",
+		}
+		// Cursor on "arg1"
+		tm := newTestModelWithLinesAndCursorPos(t, lines, core.Position{Col: 4, Line: 1})
+		sendKeys(tm, "v", "i", "(")
+
+		m := getFinalModel(t, tm)
+		// Should select from after '(' to before ')'
+		// Line 0, col 9 (after '(') to line 3, col -1 (before ')')
+		// But since we're in visual mode, check the anchor and cursor
+		if m.ActiveWindow().Anchor.Line != 0 || m.ActiveWindow().Cursor.Line != 2 {
+			t.Errorf("anchor.Line=%d, cursor.Line=%d, want anchor.Line=0, cursor.Line=2",
+				m.ActiveWindow().Anchor.Line, m.ActiveWindow().Cursor.Line)
+		}
+		// Anchor should be at col 9 (after '('), cursor at end of line 2
+		if m.ActiveWindow().Anchor.Col != 9 {
+			t.Errorf("anchor.Col=%d, want 9", m.ActiveWindow().Anchor.Col)
+		}
+	})
+
+	t.Run("test 'di(' on multi-line parentheses", func(t *testing.T) {
+		lines := []string{
+			"function(",
+			"    arg1,",
+			"    arg2",
+			")",
+		}
+		// Cursor on "arg1"
+		tm := newTestModelWithLinesAndCursorPos(t, lines, core.Position{Col: 4, Line: 1})
+		sendKeys(tm, "d", "i", "(")
+
+		m := getFinalModel(t, tm)
+		expected := []string{
+			"function(",
+			")",
+		}
+		if !slicesEqual(m.ActiveBuffer().Lines, expected) {
+			t.Errorf("lines = %v, want %v", m.ActiveBuffer().Lines, expected)
+		}
+	})
+
+	t.Run("test nested multi-line braces - cursor in outer", func(t *testing.T) {
+		lines := []string{
+			"outer {",
+			"    inner {",
+			"        content",
+			"    }",
+			"    more",
+			"}",
+		}
+		// Cursor on "more" (inside outer, outside inner)
+		tm := newTestModelWithLinesAndCursorPos(t, lines, core.Position{Col: 4, Line: 4})
+		sendKeys(tm, "d", "i", "{")
+
+		m := getFinalModel(t, tm)
+		expected := []string{
+			"outer {",
+			"}",
+		}
+		if !slicesEqual(m.ActiveBuffer().Lines, expected) {
+			t.Errorf("lines = %v, want %v", m.ActiveBuffer().Lines, expected)
+		}
+	})
+
+	t.Run("test nested multi-line braces - cursor in inner", func(t *testing.T) {
+		lines := []string{
+			"outer {",
+			"    inner {",
+			"        content",
+			"    }",
+			"    more",
+			"}",
+		}
+		// Cursor on "content" (inside inner block)
+		tm := newTestModelWithLinesAndCursorPos(t, lines, core.Position{Col: 8, Line: 2})
+		sendKeys(tm, "d", "i", "{")
+
+		m := getFinalModel(t, tm)
+		expected := []string{
+			"outer {",
+			"    inner {",
+			"    }",
+			"    more",
+			"}",
+		}
+		if !slicesEqual(m.ActiveBuffer().Lines, expected) {
+			t.Errorf("lines = %v, want %v", m.ActiveBuffer().Lines, expected)
+		}
+	})
+
+	t.Run("test nested multi-line braces with multiple nesting levels", func(t *testing.T) {
+		lines := []string{
+			"level1 {",
+			"    level2 {",
+			"        level3 {",
+			"            target",
+			"        }",
+			"    }",
+			"}",
+		}
+		// Cursor on "target"
+		tm := newTestModelWithLinesAndCursorPos(t, lines, core.Position{Col: 12, Line: 3})
+		sendKeys(tm, "d", "i", "{")
+
+		m := getFinalModel(t, tm)
+		expected := []string{
+			"level1 {",
+			"    level2 {",
+			"        level3 {",
+			"        }",
+			"    }",
+			"}",
+		}
+		if !slicesEqual(m.ActiveBuffer().Lines, expected) {
+			t.Errorf("lines = %v, want %v", m.ActiveBuffer().Lines, expected)
+		}
+	})
+
+	t.Run("test multi-line delimiters - cursor on opening line", func(t *testing.T) {
+		lines := []string{
+			"function(arg) {",
+			"    body",
+			"}",
+		}
+		// Cursor on opening line, after '{'
+		tm := newTestModelWithLinesAndCursorPos(t, lines, core.Position{Col: 14, Line: 0})
+		sendKeys(tm, "d", "i", "{")
+
+		m := getFinalModel(t, tm)
+		expected := []string{
+			"function(arg) {",
+			"}",
+		}
+		if !slicesEqual(m.ActiveBuffer().Lines, expected) {
+			t.Errorf("lines = %v, want %v", m.ActiveBuffer().Lines, expected)
+		}
+	})
+
+	t.Run("test multi-line delimiters - cursor on closing line", func(t *testing.T) {
+		lines := []string{
+			"function(arg) {",
+			"    body",
+			"}",
+		}
+		// Cursor on closing line, before '}'
+		tm := newTestModelWithLinesAndCursorPos(t, lines, core.Position{Col: 0, Line: 2})
+		sendKeys(tm, "d", "i", "{")
+
+		m := getFinalModel(t, tm)
+		expected := []string{
+			"function(arg) {",
+			"}",
+		}
+		if !slicesEqual(m.ActiveBuffer().Lines, expected) {
+			t.Errorf("lines = %v, want %v", m.ActiveBuffer().Lines, expected)
+		}
+	})
+
+	t.Run("test multi-line delimiters - cursor before delimiters searches forward", func(t *testing.T) {
+		lines := []string{
+			"before",
+			"function(arg) {",
+			"    body",
+			"}",
+			"after",
+		}
+		// Cursor on "before"
+		tm := newTestModelWithLinesAndCursorPos(t, lines, core.Position{Col: 0, Line: 0})
+		sendKeys(tm, "d", "i", "{")
+
+		m := getFinalModel(t, tm)
+		expected := []string{
+			"before",
+			"function(arg) {",
+			"}",
+			"after",
+		}
+		if !slicesEqual(m.ActiveBuffer().Lines, expected) {
+			t.Errorf("lines = %v, want %v", m.ActiveBuffer().Lines, expected)
+		}
+	})
+
+	t.Run("test nested parentheses across lines", func(t *testing.T) {
+		lines := []string{
+			"outer(",
+			"    inner(",
+			"        content",
+			"    ),",
+			"    more",
+			")",
+		}
+		// Cursor on "content"
+		tm := newTestModelWithLinesAndCursorPos(t, lines, core.Position{Col: 8, Line: 2})
+		sendKeys(tm, "d", "i", "(")
+
+		m := getFinalModel(t, tm)
+		expected := []string{
+			"outer(",
+			"    inner(",
+			"    ),",
+			"    more",
+			")",
+		}
+		if !slicesEqual(m.ActiveBuffer().Lines, expected) {
+			t.Errorf("lines = %v, want %v", m.ActiveBuffer().Lines, expected)
+		}
+	})
+}
+
+// Helper function to compare slices
+func slicesEqual(a, b []string) bool {
+	if len(a) != len(b) {
+		return false
+	}
+	for i := range a {
+		if a[i] != b[i] {
+			return false
+		}
+	}
+	return true
+}

internal/input/handler.go

@@ -15,6 +15,7 @@ const (
 	StateOperatorPending
 	StateMotionCount
 	StateWaitingForChar       // Waiting for character argument (f/t/F/T)
+	StateWaitingForTextObject // Waiting for text object (after i/a)
 )
 
 // Handler: Manages input processing with a state machine for vim-style commands.
@@ -28,6 +29,7 @@ type Handler struct {
 	buffer         string // for display (what user has typed)
 	pending        string // partial key sequence (e.g., "g" waiting for second key)
 	charMotionType string // which char motion is waiting: "f", "t", "F", or "T"
+	modifier       string // which modifier used for text object: "i" or "a"
 
 	// Keymaps
 	normalKeymap  *Keymap
@@ -77,6 +79,22 @@ func (h *Handler) Handle(m action.Model, key string) tea.Cmd {
 		return h.handleCharMotion(m, key)
 	}
 
+	if h.state == StateWaitingForTextObject {
+		return h.handleTextObjectKey(m, key)
+	}
+
+	// i/a after operator or in visual mode = text object modifier
+	if (key == "i" || key == "a") && h.pending == "" {
+		if h.state == StateOperatorPending ||
+			h.state == StateMotionCount ||
+			m.Mode().IsVisualMode() {
+			h.modifier = key
+			h.state = StateWaitingForTextObject
+			h.buffer += key
+			return nil
+		}
+	}
+
 	// Try to accumulate count (only if no pending sequence)
 	if h.pending == "" && h.tryAccumulateCount(key) {
 		return nil
@@ -139,6 +157,8 @@ func (h *Handler) dispatch(m action.Model, kind string, binding any, key string)
 		return h.handleInitial(m, kind, binding, key)
 	case StateOperatorPending, StateMotionCount:
 		return h.handleAfterOperator(m, kind, binding, key)
+	case StateWaitingForTextObject:
+		return h.handleTextObject(m, kind, binding, key)
 	}
 	h.Reset()
 	return nil
@@ -220,6 +240,11 @@ func (h *Handler) handleAfterOperator(m action.Model, kind string, binding any,
 		return nil
 	}
 
+	// Do not quit when we see a/i (allow for text objects)
+	if kind == "modifier" {
+		return nil
+	}
+
 	// Motion after operator
 	if kind == "motion" {
 		mot := binding.(action.Motion)
@@ -321,6 +346,60 @@ func (h *Handler) handleCharMotion(m action.Model, key string) tea.Cmd {
 	return cmd
 }
 
+// Handler.handleTextObject: Handles input when waiting for text object after i/a.
+// Processes text objects like 'w', ')', '"', etc. and applies pending operator if any.
+func (h *Handler) handleTextObject(m action.Model, kind string, binding any, key string) tea.Cmd {
+	// Not sure what count is fore
+	// count := h.effectiveCount()
+
+	if kind != "text_object" {
+		// Invalid - expected a text object
+		h.Reset()
+		return nil
+	}
+
+	textObj := binding.(action.TextObject)
+	win := m.ActiveWindow()
+
+	// Calculate the region
+	start, end, mtype := textObj.GetRange(m, win.Cursor, h.modifier)
+
+	// If we have an operator pending (e.g., "diw")
+	if h.operator != nil {
+		cmd := h.operator.Operate(m, start, end, mtype)
+		h.Reset()
+		return cmd
+	}
+
+	// In visual mode (e.g., "viw")
+	if m.Mode().IsVisualMode() {
+		// Set anchor and cursor to define the selection
+		win.Anchor = start
+		win.Cursor = end
+		h.Reset()
+		return nil
+	}
+
+	// Shouldn't reach here - text object without operator or visual mode
+	h.Reset()
+	return nil
+}
+
+// Handler.handleTextObjectKey: Handles the key press when waiting for a text object.
+// Looks up the text object directly (bypassing normal motion lookup).
+func (h *Handler) handleTextObjectKey(m action.Model, key string) tea.Cmd {
+	// Look up text object directly
+	textObj, ok := h.currentKeymap.textObjects[key]
+	if !ok {
+		// Not a valid text object
+		h.Reset()
+		return nil
+	}
+
+	// Call the existing handleTextObject with the found text object
+	return h.handleTextObject(m, "text_object", textObj, key)
+}
+
 // Handler.tryAccumulateCount: Attempts to add a digit to the count. Returns
 // true if successful, false if the key is not a digit or is an invalid count.
 func (h *Handler) tryAccumulateCount(key string) bool {
@@ -379,6 +458,7 @@ func (h *Handler) Reset() {
 	h.buffer = ""
 	h.pending = ""
 	h.charMotionType = ""
+	h.modifier = ""
 }
 
 // Handler.Pending: Returns the accumulated input buffer for display.

internal/input/keymap.go

@@ -5,6 +5,7 @@ import (
 	"git.gophernest.net/azpect/TextEditor/internal/command"
 	"git.gophernest.net/azpect/TextEditor/internal/motion"
 	"git.gophernest.net/azpect/TextEditor/internal/operator"
+	"git.gophernest.net/azpect/TextEditor/internal/textobject"
 )
 
 // Keymap: Maps key sequences to motions, operators, and actions.
@@ -13,6 +14,8 @@ type Keymap struct {
 	operators   map[string]action.Operator
 	actions     map[string]action.Action     // standalone actions: i.e., 'i', 'a'
 	charMotions map[string]action.Motion     // motions that need character argument: f/t/F/T
+	modifiers   map[string]any               // modifiers for text objects: i/a
+	textObjects map[string]action.TextObject // motions that need text objects: i.e., 'viw'
 }
 
 // NewNormalKeymap: Creates a keymap for normal mode with all standard vim bindings.
@@ -73,6 +76,28 @@ func NewNormalKeymap() *Keymap {
 			"t": action.FindChar{Forward: true, Inclusive: false, Repeated: false},
 			"T": action.FindChar{Forward: false, Inclusive: false, Repeated: false},
 		},
+		modifiers: map[string]any{
+			"i": nil,
+			"a": nil,
+		},
+		textObjects: map[string]action.TextObject{
+			"w": textobject.Word{},
+			"W": textobject.WORD{},
+			// TODO: 's' and 'p'
+			"{":  textobject.Delimiter{Char: '{'},
+			"}":  textobject.Delimiter{Char: '}'},
+			"(":  textobject.Delimiter{Char: '('},
+			")":  textobject.Delimiter{Char: ')'},
+			"[":  textobject.Delimiter{Char: '['},
+			"]":  textobject.Delimiter{Char: ']'},
+			"<":  textobject.Delimiter{Char: '<'},
+			">":  textobject.Delimiter{Char: '>'},
+			"\"": textobject.Delimiter{Char: '"'},
+			"'":  textobject.Delimiter{Char: '\''},
+			"`":  textobject.Delimiter{Char: '`'},
+			"b":  textobject.Delimiter{Char: '('},
+			"B":  textobject.Delimiter{Char: '{'},
+		},
 	}
 }
 
@@ -114,6 +139,28 @@ func NewVisualKeymap() *Keymap {
 			"t": action.FindChar{Forward: true, Inclusive: false},
 			"T": action.FindChar{Forward: false, Inclusive: false},
 		},
+		modifiers: map[string]any{
+			"i": nil,
+			"a": nil,
+		},
+		textObjects: map[string]action.TextObject{
+			"w": textobject.Word{},
+			"W": textobject.WORD{},
+			// TODO: 's' and 'p'
+			"{":  textobject.Delimiter{Char: '{'},
+			"}":  textobject.Delimiter{Char: '}'},
+			"(":  textobject.Delimiter{Char: '('},
+			")":  textobject.Delimiter{Char: ')'},
+			"[":  textobject.Delimiter{Char: '['},
+			"]":  textobject.Delimiter{Char: ']'},
+			"<":  textobject.Delimiter{Char: '<'},
+			">":  textobject.Delimiter{Char: '>'},
+			"\"": textobject.Delimiter{Char: '"'},
+			"'":  textobject.Delimiter{Char: '\''},
+			"`":  textobject.Delimiter{Char: '`'},
+			"b":  textobject.Delimiter{Char: '('},
+			"B":  textobject.Delimiter{Char: '{'},
+		},
 	}
 }
 
@@ -173,6 +220,12 @@ func (km *Keymap) Lookup(key string) (kind string, value any) {
 	if cm, ok := km.charMotions[key]; ok {
 		return "char_motion", cm
 	}
+	if mo, ok := km.modifiers[key]; ok {
+		return "modifier", mo
+	}
+	if to, ok := km.textObjects[key]; ok {
+		return "text_object", to
+	}
 	return "", nil
 }
 
@@ -198,6 +251,16 @@ func (km *Keymap) HasPrefix(prefix string) bool {
 			return true
 		}
 	}
+	for key := range km.modifiers {
+		if len(key) > len(prefix) && key[:len(prefix)] == prefix {
+			return true
+		}
+	}
+	for key := range km.textObjects {
+		if len(key) > len(prefix) && key[:len(prefix)] == prefix {
+			return true
+		}
+	}
 	return false
 }
 

internal/textobject/delimiter.go

@@ -0,0 +1,518 @@
+package textobject
+
+import (
+	"fmt"
+	"slices"
+
+	"git.gophernest.net/azpect/TextEditor/internal/action"
+	"git.gophernest.net/azpect/TextEditor/internal/core"
+)
+
+// Map opposite char
+var DirectionalDelimiterMap map[rune]rune = map[rune]rune{
+	'(': ')',
+	'[': ']',
+	'{': '}',
+	'<': '>',
+}
+
+var singleDelimiterList []rune = []rune{'"', '\'', '`'}
+
+func getStartDelimiterFromEnd(d rune) (rune, bool) {
+	if slices.Contains(singleDelimiterList, d) {
+		return d, true
+	}
+
+	for start, end := range DirectionalDelimiterMap {
+		if end == d {
+			return start, true
+		}
+	}
+
+	return ' ', false
+}
+
+func getEndDelimiterFromStart(d rune) (rune, bool) {
+	if slices.Contains(singleDelimiterList, d) {
+		return d, true
+	}
+
+	end, found := DirectionalDelimiterMap[d]
+	return end, found
+}
+
+// Delimiter implements text object for words (iw/aw)
+type Delimiter struct {
+	Char rune
+}
+
+func (to Delimiter) GetRange(m action.Model, cursor core.Position, modifier string) (core.Position, core.Position, core.MotionType) {
+	buf := m.ActiveBuffer()
+
+	// Determine which is a starting delimiter and which ends
+	_, isStartingDelimiter := DirectionalDelimiterMap[to.Char]
+	var (
+		startDelim rune
+		endDelim   rune
+		startFound bool = true
+		endFound   bool = true
+	)
+
+	if isStartingDelimiter {
+		startDelim = to.Char
+		endDelim, endFound = getEndDelimiterFromStart(to.Char)
+	} else {
+		endDelim = to.Char
+		startDelim, startFound = getStartDelimiterFromEnd(to.Char)
+	}
+
+	if !endFound || !startFound {
+		m.SetCommandOutput(&core.CommandOutput{
+			Lines:   []string{fmt.Sprintf("Could not find delimiters from '%c'", to.Char)},
+			Inline:  true,
+			IsError: false,
+		})
+		return cursor, cursor, core.CharwiseExclusive
+	}
+
+	// Use multi-line delimiter pair finding
+	start, end, found := findMultiLineDelimiterPair(buf.Lines, startDelim, endDelim, cursor, modifier == "a")
+
+	if !found {
+		return cursor, cursor, core.CharwiseExclusive
+	}
+
+	// Check if positions are valid
+	if start.Line > end.Line || (start.Line == end.Line && start.Col > end.Col) {
+		return cursor, cursor, core.CharwiseExclusive
+	}
+
+	return start, end, core.CharwiseInclusive
+}
+
+func findDelimiterStart(line string, delimiter rune, col int, includeDelimiter bool) (core.Position, bool) {
+	for i := col; i >= 0; i-- {
+		if rune(line[i]) == delimiter {
+			if includeDelimiter {
+				return core.Position{Line: 0, Col: i}, true
+			}
+			return core.Position{Line: 0, Col: i + 1}, true
+		}
+	}
+	return core.Position{Line: 0, Col: 0}, false
+}
+
+func findDelimiterEnd(line string, delimiter rune, col int, includeDelimiter bool) (core.Position, bool) {
+	for i := col; i < len(line); i++ {
+		if rune(line[i]) == delimiter {
+			if includeDelimiter {
+				return core.Position{Line: 0, Col: i}, true
+			}
+			return core.Position{Line: 0, Col: i - 1}, true
+		}
+	}
+	return core.Position{Line: 0, Col: 0}, false
+}
+
+// findDelimiterPair tries to find a matching pair of delimiters.
+// First it tries to find delimiters around the cursor.
+// If that fails, it searches forward for the next pair.
+func findDelimiterPair(line string, startDelim, endDelim rune, cursorCol int, includeDelimiters bool) (core.Position, core.Position, bool) {
+	// First, try to find delimiters around cursor
+	start, sOk := findDelimiterStart(line, startDelim, cursorCol, includeDelimiters)
+	end, eOk := findDelimiterEnd(line, endDelim, cursorCol, includeDelimiters)
+
+	if sOk && eOk {
+		// Verify this is actually a valid pair by checking there are no
+		// unmatched delimiters between start and end
+		var startDelimPos, endDelimPos int
+		if includeDelimiters {
+			startDelimPos = start.Col
+			endDelimPos = end.Col
+		} else {
+			startDelimPos = start.Col - 1
+			endDelimPos = end.Col + 1
+		}
+
+		// For proper pair validation, check if this is the nearest matching pair
+		// by ensuring the end delimiter we found is the first one after the start
+		if isValidPair(line, startDelim, endDelim, startDelimPos, endDelimPos) {
+			// Cursor should be at or between the delimiters
+			if startDelimPos <= cursorCol && cursorCol <= endDelimPos {
+				return start, end, true
+			}
+		}
+	}
+
+	// Not inside delimiters, search forward for next pair
+	startDelimPos, foundStart := findNextDelimiter(line, startDelim, cursorCol)
+	if !foundStart {
+		return core.Position{}, core.Position{}, false
+	}
+
+	endDelimPos, foundEnd := findNextDelimiter(line, endDelim, startDelimPos+1)
+	if !foundEnd {
+		return core.Position{}, core.Position{}, false
+	}
+
+	// Validate this pair as well
+	if !isValidPair(line, startDelim, endDelim, startDelimPos, endDelimPos) {
+		return core.Position{}, core.Position{}, false
+	}
+
+	// Calculate start and end positions based on modifier
+	if includeDelimiters {
+		start = core.Position{Line: 0, Col: startDelimPos}
+		end = core.Position{Line: 0, Col: endDelimPos}
+	} else {
+		start = core.Position{Line: 0, Col: startDelimPos + 1}
+		end = core.Position{Line: 0, Col: endDelimPos - 1}
+	}
+
+	return start, end, true
+}
+
+// isValidPair checks if the delimiters at startPos and endPos form a valid matching pair.
+// For same-delimiter pairs (quotes), it checks they form an opening/closing pair.
+// For directional pairs (parens, brackets), it ensures the end is the matching closer for the start.
+func isValidPair(line string, startDelim, endDelim rune, startPos, endPos int) bool {
+	if startPos >= endPos {
+		return false
+	}
+
+	// For quote-like delimiters where start and end are the same
+	if startDelim == endDelim {
+		// For quotes, we need to determine if startPos is an opening quote and endPos is a closing quote
+		// We do this by counting quotes before each position
+		// An opening quote has an even number of quotes before it (0, 2, 4, ...)
+		// A closing quote has an odd number of quotes before it (1, 3, 5, ...)
+
+		quotesBeforeStart := 0
+		for i := 0; i < startPos; i++ {
+			if rune(line[i]) == startDelim {
+				quotesBeforeStart++
+			}
+		}
+
+		quotesBeforeEnd := quotesBeforeStart + 1 // We know there's at least the startPos quote
+		for i := startPos + 1; i < endPos; i++ {
+			if rune(line[i]) == startDelim {
+				quotesBeforeEnd++
+			}
+		}
+
+		// startPos should be an opening quote (even number before it)
+		// endPos should be a closing quote (odd number before it)
+		// AND there should be no quotes between them for a simple pair
+		startIsOpening := quotesBeforeStart%2 == 0
+		endIsClosing := quotesBeforeEnd%2 == 1
+		noQuotesBetween := quotesBeforeEnd == quotesBeforeStart+1
+
+		return startIsOpening && endIsClosing && noQuotesBetween
+	}
+
+	// For directional delimiters, check that endPos has the first unmatched closing delimiter
+	// Simple approach: ensure there's no end delimiter between startPos and endPos that would
+	// close an earlier start delimiter
+	nestLevel := 0
+	for i := startPos + 1; i < endPos; i++ {
+		if rune(line[i]) == startDelim {
+			nestLevel++
+		} else if rune(line[i]) == endDelim {
+			if nestLevel > 0 {
+				nestLevel--
+			} else {
+				// Found an unmatched end delimiter before our endPos
+				return false
+			}
+		}
+	}
+
+	// The endPos should close the startPos
+	return nestLevel == 0
+}
+
+// findNextDelimiter searches forward from startCol for the next occurrence of delimiter
+func findNextDelimiter(line string, delimiter rune, startCol int) (int, bool) {
+	for i := startCol; i < len(line); i++ {
+		if rune(line[i]) == delimiter {
+			return i, true
+		}
+	}
+	return 0, false
+}
+
+// ============================================================================
+// Multi-line Delimiter Functions
+// ============================================================================
+
+// findMultiLineDelimiterPair finds a matching pair of delimiters across multiple lines.
+// It handles proper nesting for directional delimiters (parens, brackets, braces).
+func findMultiLineDelimiterPair(lines []string, startDelim, endDelim rune, cursor core.Position, includeDelimiters bool) (core.Position, core.Position, bool) {
+	// First, try to find delimiters around the cursor position (innermost pair)
+	start, end, found := findEnclosingDelimiterPair(lines, startDelim, endDelim, cursor, includeDelimiters)
+	if found {
+		return start, end, true
+	}
+
+	// Not inside delimiters, search forward for the next pair
+	start, end, found = findNextDelimiterPair(lines, startDelim, endDelim, cursor, includeDelimiters)
+	return start, end, found
+}
+
+// findEnclosingDelimiterPair finds the innermost delimiter pair that encloses the cursor.
+func findEnclosingDelimiterPair(lines []string, startDelim, endDelim rune, cursor core.Position, includeDelimiters bool) (core.Position, core.Position, bool) {
+	// Search backward from cursor to find opening delimiter
+	startPos, foundStart := searchBackwardForDelimiter(lines, startDelim, endDelim, cursor)
+	if !foundStart {
+		return core.Position{}, core.Position{}, false
+	}
+
+	// Search forward from the opening delimiter to find matching closing delimiter
+	endPos, foundEnd := searchForwardForMatchingDelimiter(lines, startDelim, endDelim, startPos)
+	if !foundEnd {
+		return core.Position{}, core.Position{}, false
+	}
+
+	// Check if cursor is between these delimiters
+	if !isCursorBetween(cursor, startPos, endPos) {
+		return core.Position{}, core.Position{}, false
+	}
+
+	// Adjust positions based on includeDelimiters
+	start, end, ok := adjustDelimiterPositions(lines, startPos, endPos, includeDelimiters)
+	return start, end, ok
+}
+
+// findNextDelimiterPair searches forward from cursor for the next delimiter pair.
+func findNextDelimiterPair(lines []string, startDelim, endDelim rune, cursor core.Position, includeDelimiters bool) (core.Position, core.Position, bool) {
+	// Search forward from cursor for opening delimiter
+	startPos, foundStart := searchForwardSimple(lines, startDelim, cursor)
+	if !foundStart {
+		return core.Position{}, core.Position{}, false
+	}
+
+	// Search forward from opening for matching closing delimiter
+	endPos, foundEnd := searchForwardForMatchingDelimiter(lines, startDelim, endDelim, startPos)
+	if !foundEnd {
+		return core.Position{}, core.Position{}, false
+	}
+
+	// Adjust positions based on includeDelimiters
+	start, end, ok := adjustDelimiterPositions(lines, startPos, endPos, includeDelimiters)
+	return start, end, ok
+}
+
+// searchBackwardForDelimiter searches backward from cursor to find the nearest opening delimiter
+// that could enclose the cursor position.
+func searchBackwardForDelimiter(lines []string, startDelim, endDelim rune, cursor core.Position) (core.Position, bool) {
+	// For quote-like delimiters, only search current line
+	if startDelim == endDelim {
+		return searchBackwardForDelimiterSingleLine(lines[cursor.Line], startDelim, endDelim, cursor.Col, cursor.Line)
+	}
+
+	// Start from cursor position and go backward
+	line := cursor.Line
+	col := cursor.Col
+
+	// Search current line from cursor backwards
+	for i := col; i >= 0; i-- {
+		if i < len(lines[line]) && rune(lines[line][i]) == startDelim {
+			// Found a potential start delimiter, verify it could enclose cursor
+			pos := core.Position{Line: line, Col: i}
+			// Check if this delimiter's matching pair is after the cursor
+			endPos, found := searchForwardForMatchingDelimiter(lines, startDelim, endDelim, pos)
+			if found && isCursorBetween(cursor, pos, endPos) {
+				return pos, true
+			}
+		}
+	}
+
+	// Search previous lines
+	for line = cursor.Line - 1; line >= 0; line-- {
+		for i := len(lines[line]) - 1; i >= 0; i-- {
+			if rune(lines[line][i]) == startDelim {
+				pos := core.Position{Line: line, Col: i}
+				endPos, found := searchForwardForMatchingDelimiter(lines, startDelim, endDelim, pos)
+				if found && isCursorBetween(cursor, pos, endPos) {
+					return pos, true
+				}
+			}
+		}
+	}
+
+	return core.Position{}, false
+}
+
+// searchBackwardForDelimiterSingleLine searches backward on a single line (for quotes).
+func searchBackwardForDelimiterSingleLine(line string, startDelim, endDelim rune, col int, lineNum int) (core.Position, bool) {
+	for i := col; i >= 0; i-- {
+		if i < len(line) && rune(line[i]) == startDelim {
+			// For quotes, verify it's an opening quote by checking if it has a matching closing quote
+			// Count quotes before this position
+			quotesBefore := 0
+			for j := 0; j < i; j++ {
+				if rune(line[j]) == startDelim {
+					quotesBefore++
+				}
+			}
+			// If even number of quotes before, this is an opening quote
+			if quotesBefore%2 == 0 {
+				// Find matching closing quote
+				for j := i + 1; j < len(line); j++ {
+					if rune(line[j]) == endDelim {
+						// Check if cursor is between i and j
+						if col > i && col < j {
+							return core.Position{Line: lineNum, Col: i}, true
+						}
+						break
+					}
+				}
+			}
+		}
+	}
+	return core.Position{}, false
+}
+
+// searchForwardForMatchingDelimiter searches forward from startPos to find the matching closing delimiter.
+// It properly handles nesting for directional delimiters.
+func searchForwardForMatchingDelimiter(lines []string, startDelim, endDelim rune, startPos core.Position) (core.Position, bool) {
+	nestLevel := 0
+	line := startPos.Line
+	startCol := startPos.Col + 1 // Start after the opening delimiter
+
+	// For quote-like delimiters (same start and end)
+	if startDelim == endDelim {
+		// Simple search for next occurrence on same line
+		if line < len(lines) {
+			for i := startCol; i < len(lines[line]); i++ {
+				if rune(lines[line][i]) == endDelim {
+					return core.Position{Line: line, Col: i}, true
+				}
+			}
+		}
+		return core.Position{}, false
+	}
+
+	// For directional delimiters with nesting
+	// Search current line from startCol
+	for i := startCol; i < len(lines[line]); i++ {
+		ch := rune(lines[line][i])
+		if ch == startDelim {
+			nestLevel++
+		} else if ch == endDelim {
+			if nestLevel == 0 {
+				return core.Position{Line: line, Col: i}, true
+			}
+			nestLevel--
+		}
+	}
+
+	// Search subsequent lines
+	for line = startPos.Line + 1; line < len(lines); line++ {
+		for i := 0; i < len(lines[line]); i++ {
+			ch := rune(lines[line][i])
+			if ch == startDelim {
+				nestLevel++
+			} else if ch == endDelim {
+				if nestLevel == 0 {
+					return core.Position{Line: line, Col: i}, true
+				}
+				nestLevel--
+			}
+		}
+	}
+
+	return core.Position{}, false
+}
+
+// searchForwardSimple searches forward from cursor for the next occurrence of delimiter.
+func searchForwardSimple(lines []string, delimiter rune, cursor core.Position) (core.Position, bool) {
+	// Search current line from cursor
+	for i := cursor.Col; i < len(lines[cursor.Line]); i++ {
+		if rune(lines[cursor.Line][i]) == delimiter {
+			return core.Position{Line: cursor.Line, Col: i}, true
+		}
+	}
+
+	// Search subsequent lines
+	for line := cursor.Line + 1; line < len(lines); line++ {
+		for i := 0; i < len(lines[line]); i++ {
+			if rune(lines[line][i]) == delimiter {
+				return core.Position{Line: line, Col: i}, true
+			}
+		}
+	}
+
+	return core.Position{}, false
+}
+
+// isCursorBetween checks if cursor is between start and end positions.
+func isCursorBetween(cursor, start, end core.Position) bool {
+	// Check if cursor is after or at start
+	if cursor.Line < start.Line || (cursor.Line == start.Line && cursor.Col < start.Col) {
+		return false
+	}
+
+	// Check if cursor is before or at end
+	if cursor.Line > end.Line || (cursor.Line == end.Line && cursor.Col > end.Col) {
+		return false
+	}
+
+	return true
+}
+
+// hasOnlyWhitespaceBefore checks if there is only whitespace before the character at col.
+func hasOnlyWhitespaceBefore(line string, col int) bool {
+	for i := 0; i < col; i++ {
+		if !isWhitespace(rune(line[i])) {
+			return false
+		}
+	}
+	return true
+}
+
+// isWhitespace checks if a rune is whitespace.
+func isWhitespace(r rune) bool {
+	return r == ' ' || r == '\t'
+}
+
+// adjustDelimiterPositions adjusts the delimiter positions based on whether to include delimiters.
+func adjustDelimiterPositions(lines []string, startPos, endPos core.Position, includeDelimiters bool) (core.Position, core.Position, bool) {
+	if includeDelimiters {
+		// Include the delimiters themselves
+		return startPos, endPos, true
+	}
+
+	// Exclude the delimiters - start after opening, end before closing
+	start := core.Position{Line: startPos.Line, Col: startPos.Col + 1}
+	end := core.Position{Line: endPos.Line, Col: endPos.Col - 1}
+
+	// Handle special cases
+	if startPos.Line == endPos.Line {
+		// Same line - check if there's content between delimiters
+		if startPos.Col+1 > endPos.Col-1 {
+			// Empty delimiters like "()" - return positions that will be detected as invalid
+			return start, end, true
+		}
+	} else {
+		// Multi-line case
+		// If start position is beyond the line (delimiter was last char on its line)
+		if start.Col >= len(lines[start.Line]) {
+			// Position at end of line to include the newline in deletion
+			start.Col = len(lines[start.Line])
+		}
+
+		// If end position is negative (delimiter was first char on its line) OR
+		// delimiter has only whitespace before it on its line
+		if end.Col < 0 || hasOnlyWhitespaceBefore(lines[endPos.Line], endPos.Col) {
+			// Position at end of previous line to include that line's newline
+			if end.Line > 0 {
+				end.Line--
+				end.Col = len(lines[end.Line])
+			}
+		}
+	}
+
+	return start, end, true
+}

internal/textobject/word.go

@@ -0,0 +1,205 @@
+package textobject
+
+import (
+	"git.gophernest.net/azpect/TextEditor/internal/action"
+	"git.gophernest.net/azpect/TextEditor/internal/core"
+)
+
+// Word implements text object for words (iw/aw)
+type Word struct{}
+
+func (to Word) GetRange(m action.Model, cursor core.Position, modifier string) (core.Position, core.Position, core.MotionType) {
+	buf := m.ActiveBuffer()
+	line := buf.Lines[cursor.Line]
+
+	// Find word boundaries
+	start := findWordStart(line, cursor.Col)
+	end := findWordEnd(line, cursor.Col, modifier == "a")
+
+	// Word object's don't span lines
+	start.Line = cursor.Line
+	end.Line = cursor.Line
+
+	return start, end, core.CharwiseInclusive
+}
+
+// Word implements text object for WORDs (iW/aW)
+type WORD struct{}
+
+func (to WORD) GetRange(m action.Model, cursor core.Position, modifier string) (core.Position, core.Position, core.MotionType) {
+	buf := m.ActiveBuffer()
+	line := buf.Lines[cursor.Line]
+
+	// Find word boundaries
+	start := findWORDStart(line, cursor.Col)
+	end := findWORDEnd(line, cursor.Col, modifier == "a")
+
+	// Word object's don't span lines
+	start.Line = cursor.Line
+	end.Line = cursor.Line
+
+	return start, end, core.CharwiseInclusive
+}
+
+// isWordChar: Returns true if the character is a word character (alphanumeric
+// or underscore). COPIED FROM internal/motion/word.go
+func isWordChar(c byte) bool {
+	return (c >= 'a' && c <= 'z') ||
+		(c >= 'A' && c <= 'Z') ||
+		(c >= '0' && c <= '9') ||
+		c == '_'
+}
+
+func findWordStart(line string, col int) core.Position {
+	if col >= len(line) || col < 0 {
+		return core.Position{Line: 0, Col: 0}
+	}
+
+	curChar := line[col]
+
+	// Don't start on whitespace (shouldn't happen for text objects)
+	if curChar == ' ' || curChar == '\t' {
+		return core.Position{Line: 0, Col: col}
+	}
+
+	// Determine if we're on word char or punctuation
+	onWordChar := isWordChar(curChar)
+
+	// Move backwards while in the same character class
+	i := col
+	for i > 0 {
+		prevChar := line[i-1]
+
+		// Stop at whitespace
+		if prevChar == ' ' || prevChar == '\t' {
+			break
+		}
+
+		// Stop if character class changes
+		if isWordChar(prevChar) != onWordChar {
+			break
+		}
+
+		i--
+	}
+
+	return core.Position{Line: 0, Col: i}
+}
+
+func findWordEnd(line string, col int, includeWhitespace bool) core.Position {
+	if col >= len(line) || col < 0 {
+		return core.Position{Line: 0, Col: 0}
+	}
+
+	curChar := line[col]
+
+	// Don't start on whitespace
+	if curChar == ' ' || curChar == '\t' {
+		return core.Position{Line: 0, Col: col}
+	}
+
+	// Determine if we're on word char or punctuation
+	onWordChar := isWordChar(curChar)
+
+	// Move forward while in the same character class
+	i := col
+	for i < len(line) {
+		c := line[i]
+
+		// Stop at whitespace
+		if c == ' ' || c == '\t' {
+			break
+		}
+
+		// Stop if character class changes
+		if isWordChar(c) != onWordChar {
+			break
+		}
+
+		i++
+	}
+
+	// i is now one past the end, so back up
+	i--
+
+	// If including whitespace, skip trailing spaces/tabs
+	if includeWhitespace {
+		i++ // Move forward to whitespace
+		for i < len(line) && (line[i] == ' ' || line[i] == '\t') {
+			i++
+		}
+		i-- // Back to last whitespace
+	}
+
+	return core.Position{Line: 0, Col: i}
+}
+
+func findWORDStart(line string, col int) core.Position {
+	if col >= len(line) || col < 0 {
+		return core.Position{Line: 0, Col: 0}
+	}
+
+	curChar := line[col]
+
+	// Don't start on whitespace (shouldn't happen for text objects)
+	if curChar == ' ' || curChar == '\t' {
+		return core.Position{Line: 0, Col: col}
+	}
+
+	// For WORD, all non-whitespace is one class
+	// Just move backwards until we hit whitespace or start of line
+	i := col
+	for i > 0 {
+		prevChar := line[i-1]
+
+		// Stop at whitespace
+		if prevChar == ' ' || prevChar == '\t' {
+			break
+		}
+
+		i--
+	}
+
+	return core.Position{Line: 0, Col: i}
+}
+
+func findWORDEnd(line string, col int, includeWhitespace bool) core.Position {
+	if col >= len(line) || col < 0 {
+		return core.Position{Line: 0, Col: 0}
+	}
+
+	curChar := line[col]
+
+	// Don't start on whitespace
+	if curChar == ' ' || curChar == '\t' {
+		return core.Position{Line: 0, Col: col}
+	}
+
+	// For WORD, all non-whitespace is one class
+	// Move forward until we hit whitespace or end of line
+	i := col
+	for i < len(line) {
+		c := line[i]
+
+		// Stop at whitespace
+		if c == ' ' || c == '\t' {
+			break
+		}
+
+		i++
+	}
+
+	// i is now one past the end, so back up
+	i--
+
+	// If including whitespace, skip trailing spaces/tabs
+	if includeWhitespace {
+		i++ // Move forward to whitespace
+		for i < len(line) && (line[i] == ' ' || line[i] == '\t') {
+			i++
+		}
+		i-- // Back to last whitespace
+	}
+
+	return core.Position{Line: 0, Col: i}
+}