diff --git a/src/ui/app.ts b/src/ui/app.ts
index aa1f7a9..145f3a0 100644
--- a/src/ui/app.ts
+++ b/src/ui/app.ts
@@ -247,7 +247,7 @@ export class App {
 
 				if (name === SHORTCUTS.clear.key) {
 					this.panes.get(this.activePane)?.clear()
-					this.logWriter.truncate(this.activePane)
+					this.logWriter.markCopyStart(this.activePane)
 					return
 				}
 
@@ -413,13 +413,11 @@ export class App {
 		}
 	}
 
-	/** Copy all text in the active pane to clipboard. */
+	/** Copy all text in the active pane to clipboard (unwrapped, from log file). */
 	private copyAllText(): void {
 		if (!this.activePane) return
-		const pane = this.panes.get(this.activePane)
-		if (!pane) return
 
-		const text = pane.getText()
+		const text = this.logWriter.readLog(this.activePane)
 		if (!text) {
 			this.statusBar.showTemporaryMessage('No output to copy')
 			return
diff --git a/src/utils/log-writer.test.ts b/src/utils/log-writer.test.ts
index cea6d07..cc01812 100644
--- a/src/utils/log-writer.test.ts
+++ b/src/utils/log-writer.test.ts
@@ -128,20 +128,76 @@ describe('LogWriter', () => {
 		writer.close()
 	})
 
-	test('truncate clears log file', () => {
+	test('readLog returns all content without markCopyStart', () => {
+		const writer = new LogWriter(dir)
+		writer.handleEvent(outputEvent('api', 'line 1\n'))
+		writer.handleEvent(outputEvent('api', 'line 2\n'))
+
+		const content = writer.readLog('api')
+		expect(content).toBe('line 1\nline 2\n')
+		writer.close()
+	})
+
+	test('readLog returns undefined for unknown process', () => {
+		const writer = new LogWriter(dir)
+		expect(writer.readLog('unknown')).toBeUndefined()
+		writer.close()
+	})
+
+	test('readLog returns undefined when no output after markCopyStart', () => {
 		const writer = new LogWriter(dir)
 		writer.handleEvent(outputEvent('api', 'old content\n'))
+		writer.markCopyStart('api')
 
-		const contentBefore = readFileSync(join(dir, 'api.log'), 'utf-8')
-		expect(contentBefore).toContain('old content')
+		expect(writer.readLog('api')).toBeUndefined()
+		writer.close()
+	})
 
-		writer.truncate('api')
+	test('markCopyStart makes readLog return only new content', () => {
+		const writer = new LogWriter(dir)
+		writer.handleEvent(outputEvent('api', 'old content\n'))
+		writer.markCopyStart('api')
 		writer.handleEvent(outputEvent('api', 'new content\n'))
+
+		const content = writer.readLog('api')
+		expect(content).toBe('new content\n')
+		expect(content).not.toContain('old content')
+
+		// Full file still has everything
+		const fullFile = readFileSync(join(dir, 'api.log'), 'utf-8')
+		expect(fullFile).toContain('old content')
+		expect(fullFile).toContain('new content')
+		writer.close()
+	})
+
+	test('markCopyStart can be called multiple times', () => {
+		const writer = new LogWriter(dir)
+		writer.handleEvent(outputEvent('api', 'first\n'))
+		writer.markCopyStart('api')
+		writer.handleEvent(outputEvent('api', 'second\n'))
+		writer.markCopyStart('api')
+		writer.handleEvent(outputEvent('api', 'third\n'))
+
+		const content = writer.readLog('api')
+		expect(content).toBe('third\n')
 		writer.close()
+	})
 
-		const contentAfter = readFileSync(join(dir, 'api.log'), 'utf-8')
-		expect(contentAfter).toBe('new content\n')
-		expect(contentAfter).not.toContain('old content')
+	test('markCopyStart on unknown process is a no-op', () => {
+		const writer = new LogWriter(dir)
+		writer.markCopyStart('unknown') // should not throw
+		expect(writer.readLog('unknown')).toBeUndefined()
+		writer.close()
+	})
+
+	test('readLog strips ANSI from content', () => {
+		const writer = new LogWriter(dir)
+		writer.handleEvent(outputEvent('api', '\x1b[31mred\x1b[0m\n'))
+
+		const content = writer.readLog('api')
+		expect(content).toBe('red\n')
+		expect(content).not.toContain('\x1b')
+		writer.close()
 	})
 
 	test('createTemp creates a temp directory', () => {
diff --git a/src/utils/log-writer.ts b/src/utils/log-writer.ts
index 1e15081..b2d38e7 100644
--- a/src/utils/log-writer.ts
+++ b/src/utils/log-writer.ts
@@ -1,4 +1,4 @@
-import { closeSync, mkdirSync, openSync, rmSync, symlinkSync, unlinkSync, writeSync } from 'node:fs'
+import { closeSync, mkdirSync, openSync, readSync, rmSync, symlinkSync, unlinkSync, writeSync } from 'node:fs'
 import { tmpdir } from 'node:os'
 import { basename, join } from 'node:path'
 import type { ProcessEvent } from '../types'
@@ -17,6 +17,7 @@ export class LogWriter {
 	private dir: string
 	private isTemp: boolean
 	private files = new Map<string, number>()
+	private copyOffsets = new Map<string, number>()
 	private decoder = new TextDecoder()
 	private encoder = new TextEncoder()
 
@@ -95,6 +96,38 @@ export class LogWriter {
 		}
 	}
 
+	/** Mark the current end of the log file as the start point for readLog. */
+	markCopyStart(name: string): void {
+		const path = this.getLogPath(name)
+		if (!path) return
+		try {
+			this.copyOffsets.set(name, Bun.file(path).size)
+		} catch {
+			// Ignore — file may not exist yet
+		}
+	}
+
+	/** Read log file content for a process (from last clear point). */
+	readLog(name: string): string | undefined {
+		const path = this.getLogPath(name)
+		if (!path) return undefined
+		try {
+			const size = Bun.file(path).size
+			const offset = this.copyOffsets.get(name) ?? 0
+			if (size <= offset) return undefined
+			const fd = openSync(path, 'r')
+			try {
+				const buf = Buffer.alloc(size - offset)
+				readSync(fd, buf, 0, buf.length, offset)
+				return buf.toString('utf-8')
+			} finally {
+				closeSync(fd)
+			}
+		} catch {
+			return undefined
+		}
+	}
+
 	/** Get the log file path for a process, or undefined if no output yet. */
 	getLogPath(name: string): string | undefined {
 		if (this.files.has(name)) {
@@ -207,20 +240,6 @@ export class LogWriter {
 		}
 	}
 
-	/** Truncate a process's log file (used when pane is cleared). */
-	truncate(name: string): void {
-		const fd = this.files.get(name)
-		if (fd === undefined) return
-		try {
-			closeSync(fd)
-			const path = join(this.dir, `${name}.log`)
-			const newFd = openSync(path, 'w')
-			this.files.set(name, newFd)
-		} catch {
-			// Ignore errors — file may have been deleted
-		}
-	}
-
 	close(): void {
 		for (const fd of this.files.values()) {
 			closeSync(fd)