diff --git a/e2e/cast/README.md b/e2e/cast/README.md
new file mode 100644
index 0000000..fef5f71
--- /dev/null
+++ b/e2e/cast/README.md
@@ -0,0 +1,70 @@
+# Cast-Based E2E Testing
+
+This directory contains a cast-based end-to-end (E2E) test for the AgentAPI project. The framework simulates realistic agent interactions by replaying asciicast v2 recordings.
+
+## TL;DR
+
+```shell
+go test ./e2e/cast
+```
+
+## How it Works
+
+The testing framework (`cast_test.go`) does the following:
+- Starts the AgentAPI server with a fake agent (`cmd/cast_agent.go`).
+- The fake agent replays a `.cast` file (asciicast v2 format), writing terminal output to stdout and validating stdin against the recorded input events.
+- The testing framework sends messages to the fake agent via the AgentAPI and validates the responses.
+
+## Adding or Updating Fixtures
+
+### Step 1: Record with asciinema
+
+The recording captures both agentapi's output (what it sends to the agent) and the agent's responses.
+Use `asciinema` to record agentapi wrapping the agent. Below is an example for Claude:
+
+```shell
+# Set terminal to minimum size Claude supports (80 columns)
+stty cols 80 rows 1000
+
+# Build agentapi (or use an existing known-good version)
+agentapi server -t claude -- asciinema rec --stdin testdata/claude.cast --command 'echo hello | claude'
+
+# Then interact with Claude via AgentAPI (either web UI or API):
+# 1. Wait for Claude to respond to the initial prompt
+# 2. Type a test message (e.g., "This is just a test.")
+# 3. Wait for Claude's reply
+# 4. Press Ctrl+C to exit
+```
+
+**Important notes:**
+- The terminal dimensions (80x1000) must match the `--term-width` and `--term-height` flags in the test (see `defaultCmdFn` in `cast_test.go`).
+- Recording agentapi (not Claude directly) captures the exact byte sequences that agentapi sends, including bracketed paste mode escape sequences.
+- The `--stdin` flag captures your input, which the test uses to validate that agentapi sends the correct bytes.
+- To overwrite an existing fixture, add `--overwrite` to the `asciinema` invocation.
+
+### Step 2: Create the sidecar script file
+
+Create a matching sidecar file `testdata/my-fixture.txt` that lists the expected conversation in order, one entry per line:
+
+```
+user	hello
+agent	Hello! How can I help you today?
+user	This is just a test.
+agent	Got it! Let me know if you need anything.
+```
+
+Each line is `<role><TAB><message>`. Valid roles are `agent` or `user`.
+
+**Flow explanation:**
+- Line 1: The initial prompt passed to the agent at startup
+- Line 2: The agent's reply to the initial prompt
+- Line 3: The test message sent via the AgentAPI
+- Line 4: The agent's reply to the test message
+
+Note: The AgentAPI merges the startup sequence (welcome screen + initial prompt + initial reply) into the first agent message. The test expects 3 messages from the API, even though the script file has 4 entries.
+
+### Step 3: Review and update the test
+
+> **Caution:** Review the recording before committing. Remove or redact any API keys, tokens, or other sensitive data that may appear in the terminal output (stdout events), recorded keystrokes (`"i"` events from `--stdin`), or environment variables captured in the cast header.
+
+To use a new fixture, update the `castFile` and `scriptFile` constants in `cast_test.go` to reference the new fixture files, then update the assertions in `TestE2E` to match the new conversation.
diff --git a/e2e/cast/cast_test.go b/e2e/cast/cast_test.go
new file mode 100644
index 0000000..65ade1a
--- /dev/null
+++ b/e2e/cast/cast_test.go
@@ -0,0 +1,259 @@
+package cast_test
+
+import (
+	"bufio"
+	"bytes"
+	"context"
+	"fmt"
+	"io"
+	"net"
+	"net/http"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"strings"
+	"sync"
+	"testing"
+	"time"
+
+	agentapisdk "github.com/coder/agentapi-sdk-go"
+	"github.com/stretchr/testify/require"
+)
+
+const (
+	castTestTimeout        = 30 * time.Second
+	castOperationTimeout   = 10 * time.Second
+	castHealthCheckTimeout = 10 * time.Second
+	castFile               = "testdata/claude.cast"
+	scriptFile             = "testdata/claude.txt"
+)
+
+type scriptEntry struct {
+	Role    string // "user" or "agent"
+	Message string
+}
+
+func loadScript(t testing.TB, path string) []scriptEntry {
+	t.Helper()
+	data, err := os.ReadFile(path)
+	require.NoError(t, err)
+	var entries []scriptEntry
+	sc := bufio.NewScanner(bytes.NewReader(data))
+	for sc.Scan() {
+		line := sc.Text()
+		if line == "" {
+			continue
+		}
+		role, msg, ok := strings.Cut(line, "\t")
+		require.True(t, ok, "malformed script line: %q", line)
+		require.Contains(t, []string{"user", "agent"}, role,
+			"unexpected role %q in script line: %q", role, line)
+		entries = append(entries, scriptEntry{Role: role, Message: msg})
+	}
+	require.NoError(t, sc.Err())
+	return entries
+}
+
+func TestE2E(t *testing.T) {
+	if testing.Short() {
+		t.Skip("Skipping integration test in short mode")
+	}
+
+	script := loadScript(t, scriptFile)
+	require.GreaterOrEqual(t, len(script), 4, "claude.txt must have at least 4 entries")
+	require.Equal(t, "user", script[0].Role)  // initial prompt (startup)
+	require.Equal(t, "agent", script[1].Role) // reply to initial prompt
+	require.Equal(t, "user", script[2].Role)  // test message sent via API
+	require.Equal(t, "agent", script[3].Role) // reply to test message
+	// Note: The API merges the startup sequence (initial prompt + initial reply)
+	// into the first agent message, so we expect 3 messages from the API, not 4.
+	initialPromptReply := script[1].Message
+	userMessage := script[2].Message
+	agentReply := script[3].Message
+
+	ctx, cancel := context.WithTimeout(context.Background(), castTestTimeout)
+	defer cancel()
+
+	apiClient := setup(ctx, t)
+
+	// Agent should be running while processing the initial greeting.
+	statusResp, err := apiClient.GetStatus(ctx)
+	require.NoError(t, err)
+	require.Equal(t, agentapisdk.StatusRunning, statusResp.Status)
+
+	require.NoError(t, waitAgentAPIStable(ctx, t, apiClient, castOperationTimeout, "initial stable"))
+
+	_, err = apiClient.PostMessage(ctx, agentapisdk.PostMessageParams{
+		Content: userMessage,
+		Type:    agentapisdk.MessageTypeUser,
+	})
+	require.NoError(t, err, "failed to send message")
+
+	// Agent should be running while processing the reply.
+	statusResp, err = apiClient.GetStatus(ctx)
+	require.NoError(t, err)
+	require.Equal(t, agentapisdk.StatusRunning, statusResp.Status)
+
+	require.NoError(t, waitAgentAPIStable(ctx, t, apiClient, castOperationTimeout, "post message"))
+
+	msgResp, err := apiClient.GetMessages(ctx)
+	require.NoError(t, err, "failed to get messages")
+	require.Len(t, msgResp.Messages, 3)
+	// First message is agent greeting (contains startup screen + initial prompt reply)
+	require.Contains(t, msgResp.Messages[0].Content, initialPromptReply)
+	require.Contains(t, msgResp.Messages[1].Content, userMessage)
+	require.Contains(t, msgResp.Messages[2].Content, agentReply)
+}
+
+func defaultCmdFn(ctx context.Context, t testing.TB, serverPort int, binaryPath, cwd string) (string, []string) {
+	// Terminal dimensions must match the cast file (80x1000) for correct ANSI escape sequence positioning.
+	return binaryPath, []string{"server", fmt.Sprintf("--port=%d", serverPort), "--term-width=80", "--term-height=1000", "--", "go", "run", filepath.Join(cwd, "cmd", "cast_agent.go"), castFile}
+}
+
+func setup(ctx context.Context, t testing.TB) *agentapisdk.Client {
+	t.Helper()
+
+	binaryPath := os.Getenv("AGENTAPI_BINARY_PATH")
+	if binaryPath == "" {
+		cwd, err := os.Getwd()
+		require.NoError(t, err, "Failed to get current working directory")
+		// We're in e2e/cast, so go up two levels to reach the repo root
+		binaryPath = filepath.Join(cwd, "..", "..", "out", "agentapi")
+		t.Logf("Building binary at %s", binaryPath)
+		buildCmd := exec.CommandContext(ctx, "go", "build", "-o", binaryPath, ".")
+		buildCmd.Dir = filepath.Join(cwd, "..", "..")
+		t.Logf("run: %s", buildCmd.String())
+		require.NoError(t, buildCmd.Run(), "Failed to build binary")
+	}
+
+	serverPort, err := getFreePort()
+	require.NoError(t, err, "Failed to get free port for server")
+
+	cwd, err := os.Getwd()
+	require.NoError(t, err, "Failed to get current working directory")
+
+	bin, args := defaultCmdFn(ctx, t, serverPort, binaryPath, cwd)
+	t.Logf("Running command: %s %s", bin, strings.Join(args, " "))
+	cmd := exec.CommandContext(ctx, bin, args...)
+
+	stdout, err := cmd.StdoutPipe()
+	require.NoError(t, err, "Failed to create stdout pipe")
+
+	stderr, err := cmd.StderrPipe()
+	require.NoError(t, err, "Failed to create stderr pipe")
+
+	err = cmd.Start()
+	require.NoError(t, err, "Failed to start agentapi server")
+
+	var wg sync.WaitGroup
+	wg.Add(2)
+
+	go func() {
+		defer wg.Done()
+		logOutput(t, "SERVER-STDOUT", stdout)
+	}()
+
+	go func() {
+		defer wg.Done()
+		logOutput(t, "SERVER-STDERR", stderr)
+	}()
+
+	t.Cleanup(func() {
+		if cmd.Process != nil {
+			_ = cmd.Process.Kill()
+			_ = cmd.Wait()
+		}
+		wg.Wait()
+	})
+
+	serverURL := fmt.Sprintf("http://localhost:%d", serverPort)
+	require.NoError(t, waitForServer(ctx, t, serverURL, castHealthCheckTimeout), "Server not ready")
+	apiClient, err := agentapisdk.NewClient(serverURL)
+	require.NoError(t, err, "Failed to create agentapi SDK client")
+
+	return apiClient
+}
+
+func logOutput(t testing.TB, prefix string, r io.Reader) {
+	t.Helper()
+	scanner := bufio.NewScanner(r)
+	for scanner.Scan() {
+		t.Logf("[%s] %s", prefix, scanner.Text())
+	}
+}
+
+func waitForServer(ctx context.Context, t testing.TB, url string, timeout time.Duration) error {
+	t.Helper()
+	client := &http.Client{Timeout: time.Second}
+	healthCtx, cancel := context.WithTimeout(ctx, timeout)
+	defer cancel()
+
+	ticker := time.NewTicker(100 * time.Millisecond)
+	defer ticker.Stop()
+
+	for {
+		select {
+		case <-healthCtx.Done():
+			require.Failf(t, "failed to start server", "server at %s not ready within timeout: %w", url, healthCtx.Err())
+		case <-ticker.C:
+			resp, err := client.Get(url)
+			if err == nil {
+				_ = resp.Body.Close()
+				return nil
+			}
+			t.Logf("Server not ready yet: %s", err)
+		}
+	}
+}
+
+func waitAgentAPIStable(ctx context.Context, t testing.TB, apiClient *agentapisdk.Client, waitFor time.Duration, msg string) error {
+	t.Helper()
+	waitCtx, waitCancel := context.WithTimeout(ctx, waitFor)
+	defer waitCancel()
+
+	start := time.Now()
+	var currStatus agentapisdk.AgentStatus
+	var lastMessage string
+	defer func() {
+		elapsed := time.Since(start)
+		t.Logf("%s: agent API status: %s (elapsed: %s)", msg, currStatus, elapsed.Round(100*time.Millisecond))
+		if t.Failed() && lastMessage != "" {
+			fmt.Fprintf(os.Stderr, "\n=== Last agent message ===\n%s\n=== End last agent message ===\n", lastMessage)
+		}
+	}()
+	evts, errs, err := apiClient.SubscribeEvents(ctx)
+	require.NoError(t, err, "failed to subscribe to events")
+	for {
+		select {
+		case <-waitCtx.Done():
+			return waitCtx.Err()
+		case evt := <-evts:
+			if esc, ok := evt.(agentapisdk.EventStatusChange); ok {
+				currStatus = esc.Status
+				if currStatus == agentapisdk.StatusStable {
+					return nil
+				}
+			} else if emc, ok := evt.(agentapisdk.EventMessageUpdate); ok {
+				lastMessage = emc.Message
+				t.Logf("Got message event: id=%d role=%s len=%d", emc.Id, emc.Role, len(emc.Message))
+			}
+		case err := <-errs:
+			return fmt.Errorf("read events: %w", err)
+		}
+	}
+}
+
+func getFreePort() (int, error) {
+	addr, err := net.ResolveTCPAddr("tcp", "localhost:0")
+	if err != nil {
+		return 0, err
+	}
+
+	l, err := net.ListenTCP("tcp", addr)
+	if err != nil {
+		return 0, err
+	}
+	defer func() { _ = l.Close() }()
+
+	return l.Addr().(*net.TCPAddr).Port, nil
+}
diff --git a/e2e/cast/cmd/cast_agent.go b/e2e/cast/cmd/cast_agent.go
new file mode 100644
index 0000000..d740d19
--- /dev/null
+++ b/e2e/cast/cmd/cast_agent.go
@@ -0,0 +1,123 @@
+package main
+
+import (
+	"bufio"
+	"encoding/json"
+	"fmt"
+	"io"
+	"os"
+	"os/signal"
+	"regexp"
+	"strings"
+
+	"github.com/acarl005/stripansi"
+)
+
+func main() {
+	if len(os.Args) != 2 {
+		fmt.Println("Usage: cast_agent <file.cast>")
+		os.Exit(1)
+	}
+
+	go func() {
+		sigCh := make(chan os.Signal, 1)
+		signal.Notify(sigCh, os.Interrupt)
+		<-sigCh
+		os.Exit(0)
+	}()
+
+	f, err := os.Open(os.Args[1])
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "failed to open cast file: %v\n", err)
+		os.Exit(1)
+	}
+	defer f.Close()
+
+	stdinReader := bufio.NewReader(os.Stdin)
+	fileScanner := bufio.NewScanner(f)
+
+	// Skip the header line.
+	fileScanner.Scan()
+
+	var inputBuf strings.Builder
+
+	for fileScanner.Scan() {
+		line := fileScanner.Text()
+		var event [3]json.RawMessage
+		if err := json.Unmarshal([]byte(line), &event); err != nil {
+			fmt.Fprintf(os.Stderr, "failed to parse event: %v\n", err)
+			os.Exit(1)
+		}
+
+		var eventType string
+		if err := json.Unmarshal(event[1], &eventType); err != nil {
+			fmt.Fprintf(os.Stderr, "failed to parse event type: %v\n", err)
+			os.Exit(1)
+		}
+
+		var data string
+		if err := json.Unmarshal(event[2], &data); err != nil {
+			fmt.Fprintf(os.Stderr, "failed to parse event data: %v\n", err)
+			os.Exit(1)
+		}
+
+		switch eventType {
+		case "o":
+			fmt.Print(data)
+		case "i":
+			switch data {
+			case "\r":
+				// Consume the Enter keystroke, then reset the accumulated buffer.
+				if _, err := stdinReader.ReadByte(); err != nil && err != io.EOF {
+					fmt.Fprintf(os.Stderr, "failed to read stdin: %v\n", err)
+					os.Exit(1)
+				}
+				inputBuf.Reset()
+			case "\x03":
+				// Ctrl-C marks end of interactive session; block indefinitely.
+				// This ensures the agent displays the last reply and remains stable
+				// rather than continuing to replay exit sequences.
+				<-make(chan struct{})
+			default:
+				// Block until agentapi writes this input, then validate byte-by-byte.
+				expected := []byte(data)
+				for _, exp := range expected {
+					b, err := stdinReader.ReadByte()
+					if err != nil && err != io.EOF {
+						fmt.Fprintf(os.Stderr, "failed to read stdin: %v\n", err)
+						os.Exit(1)
+					}
+					if b != exp {
+						fmt.Fprintf(os.Stderr, "input mismatch: expected 0x%02x, got 0x%02x\n", exp, b)
+						os.Exit(1)
+					}
+				}
+				inputBuf.WriteString(data)
+			}
+		}
+	}
+
+	if err := fileScanner.Err(); err != nil {
+		fmt.Fprintf(os.Stderr, "error reading cast file: %v\n", err)
+		os.Exit(1)
+	}
+
+	// Block until interrupted.
+	<-make(chan struct{})
+}
+
+func cleanTerminalInput(input string) string {
+	input = stripansi.Strip(input)
+
+	bracketedPasteRe := regexp.MustCompile(`\x1b\[\d+~`)
+	input = bracketedPasteRe.ReplaceAllString(input, "")
+
+	backspaceRe := regexp.MustCompile(`.\x08`)
+	input = backspaceRe.ReplaceAllString(input, "")
+
+	input = strings.ReplaceAll(input, "\x08", "")
+	input = strings.ReplaceAll(input, "\x7f", "")
+	input = strings.ReplaceAll(input, "\x1b", "")
+
+	return strings.TrimSpace(input)
+}
diff --git a/e2e/cast/loadscript_test.go b/e2e/cast/loadscript_test.go
new file mode 100644
index 0000000..1521f8e
--- /dev/null
+++ b/e2e/cast/loadscript_test.go
@@ -0,0 +1,55 @@
+package cast_test
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestLoadScript(t *testing.T) {
+	t.Run("happy path", func(t *testing.T) {
+		f := filepath.Join(t.TempDir(), "script.txt")
+		err := os.WriteFile(f, []byte("agent\tHello!\nuser\tHi there\nagent\tHow can I help?\n"), 0o600)
+		require.NoError(t, err)
+
+		entries := loadScript(t, f)
+		require.Len(t, entries, 3)
+		require.Equal(t, scriptEntry{Role: "agent", Message: "Hello!"}, entries[0])
+		require.Equal(t, scriptEntry{Role: "user", Message: "Hi there"}, entries[1])
+		require.Equal(t, scriptEntry{Role: "agent", Message: "How can I help?"}, entries[2])
+	})
+
+	t.Run("empty file", func(t *testing.T) {
+		f := filepath.Join(t.TempDir(), "empty.txt")
+		err := os.WriteFile(f, []byte(""), 0o600)
+		require.NoError(t, err)
+
+		entries := loadScript(t, f)
+		require.Empty(t, entries)
+	})
+
+	t.Run("blank lines are skipped", func(t *testing.T) {
+		f := filepath.Join(t.TempDir(), "blanks.txt")
+		err := os.WriteFile(f, []byte("\nagent\tGreeting\n\nuser\tQuestion\n\n"), 0o600)
+		require.NoError(t, err)
+
+		entries := loadScript(t, f)
+		require.Len(t, entries, 2)
+		require.Equal(t, "agent", entries[0].Role)
+		require.Equal(t, "user", entries[1].Role)
+	})
+
+	t.Run("tab in message body is preserved", func(t *testing.T) {
+		f := filepath.Join(t.TempDir(), "tabmsg.txt")
+		// The message itself contains a tab character after the first one.
+		err := os.WriteFile(f, []byte("user\thello\tworld\n"), 0o600)
+		require.NoError(t, err)
+
+		entries := loadScript(t, f)
+		require.Len(t, entries, 1)
+		require.Equal(t, "user", entries[0].Role)
+		require.Equal(t, "hello\tworld", entries[0].Message)
+	})
+}
diff --git a/e2e/cast/testdata/claude.cast b/e2e/cast/testdata/claude.cast
new file mode 100644
index 0000000..231fe35
--- /dev/null
+++ b/e2e/cast/testdata/claude.cast
@@ -0,0 +1,112 @@
+{"version": 2, "width": 80, "height": 1000, "timestamp": 1771590373, "env": {"SHELL": "/bin/bash", "TERM": "vt100"}}
+[0.499981, "o", "\u001b[?2026h\r\r\n\u001b[31m╭───\u001b[1CClaude\u001b[1CCode\u001b[1C\u001b[37mv2.1.49\u001b[1C\u001b[31m──────────────────────────────────────────────────────╮\u001b[39m\r\r\n\u001b[31m│\u001b[36C\u001b[2m│\u001b[1C\u001b[1mTips\u001b[1Cfor\u001b[1Cgetting\u001b[1Cstarted\u001b[16C\u001b[22m│\u001b[39m\r\r\n\u001b[31m│\u001b[12C\u001b[39m\u001b[1mWelcome\u001b[1Cback!\u001b[11C\u001b[2m\u001b[31m│\u001b[1C\u001b[39m\u001b[22mRun\u001b[1C/init\u001b[1Cto\u001b[1Ccreate\u001b[1Ca\u001b[1CCLAUDE.md\u001b[1Cfile\u001b[1Cw…\u001b[1C\u001b[31m│\u001b[39m\r\r\n\u001b[31m│\u001b[36C\u001b[2m│\u001b[1C───────────────────────────────────────\u001b[1C\u001b[22m│\u001b[39m\r\r\n\u001b[31m│\u001b[36C\u001b[2m│\u001b[1C\u001b[1mRecent\u001b[1Cactivity\u001b[25C\u001b[22m│\u001b[39m\r\r\n\u001b[31m│\u001b[18C\u001b[97m✻\u001b[17C\u001b[2m\u001b[31m│\u001b[1C\u001b[22m\u001b[37mNo\u001b[1Crecent\u001b[1Cactivity\u001b[22C\u001b[31m│\u001b[39m\r\r\n\u001b[31m│\u001b[18C\u001b[37m|\u001b[17C\u001b[2m\u001b[31m│\u001b[41C\u001b[22m│\u001b[39m\r\r\n\u001b[31m│\u001b[17C\u001b[97m▟█▙\u001b[16C\u001b[2m\u001b[31m│\u001b[41C\u001b[22m│\u001b[39m\r\r\n\u001b[31m│\u001b[15C▐\u001b[40m▛███▜\u001b[49m▌\u001b[14C\u001b[2m│\u001b[41C\u001b[22m│\u001b[39m\r\r\n\u001b[31m│\u001b[14C▝▜\u001b[40"]
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+[4.567992, "o", "\u001b[?2026h\u001b[2K\u001b[1A\u001b[2K\u001b[G\u001b[1A\r\u001b[6A\u001b[2m\u001b[37m────────────────────────────────────────────────────────────────────────────────\r\u001b[1B\u001b[39m\u001b[22m❯ \u001b[7m \r\u001b[2B\u001b[27m   \u001b[93mNative installation exists but ~/.local/bin is not in your PATH. Run:\r\u001b[1B\u001b[39m                                                                                \r\u001b[3C\u001b[1B\u001b[93mecho 'export PATH=\"$HOME/.local/bin:$PATH\"'\u001b[1C>>\u001b[1C~/.bashrc && source ~/.bashrc\r\u001b[1B\u001b[39m                                                                                \r\u001b[1B                                                                                \r\u001b[1A\u001b[?2026l"]
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+[12.175677, "i", "x\b\u001b[200~This is just a test.\u001b[201~"]
+[12.180599, "o", "\u001b[?2026h\u001b[2K\u001b[G\u001b[1A\r\u001b[2C\u001b[2Ax\u001b[7m \r\u001b[2B\u001b[27m                                                                                \r\u001b[?2026l"]
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+[14.35569, "o", "\u001b[?2026h\r\u001b[3A\u001b[31m✻\u001b[39m \u001b[33mRazzle-dazzling…\u001b[31m \u001b[39m                                                             \r\u001b[1B  ⎿  \u001b[37mTip: Use /memory to view and manage Claude memory\r\u001b[1B\u001b[39m                                                                                \r\r\n\u001b[2m\u001b[37m────────────────────────────────────────────────────────────────────────────────\u001b[39m\u001b[22m\r\r\n\u001b[37m❯ \u001b[39m\u001b[7m \u001b[27m\r\r\n\u001b[2m\u001b[37m────────────────────────────────────────────────────────────────────────────────\u001b[39m\u001b[22m\r\r\n\u001b[2C\u001b[37mesc\u001b[1Cto\u001b[1Cinterrupt\u001b[39m\r\r\n\u001b[?2026l"]
+[14.355912, "o", "\u001b]0;✳ Claude Code\u0007"]
+[14.383801, "o", "\u001b[?2026h\r\u001b[2C\u001b[7A\u001b[31mRazzle-dazzli\u001b[93mng…\u001b[39m\r\r\n\r\n\r\n\r\n\r\n\r\n\r\n\u001b[?2026l"]
+[14.409189, "o", "\u001b[?2026h\r\u001b[7A\u001b[40m\u001b[30m❯ \u001b[97mThis is just a test. \r\u001b[2C\u001b[1B\u001b[39m\u001b[49m \u001b[1C                                                  \r\u001b[1B\u001b[31m✻\u001b[1CRazzle-dazzli\u001b[93mng…\u001b[31m \r\u001b[1B\u001b[39m  ⎿  \u001b[37mTip: Use /memory to view and manage Claude memory\u001b[39m                          \r\u001b[1B   \r\u001b[2B\u001b[37m❯ \u001b[39m\u001b[7m \u001b[27m               \r\r\n\u001b[2m\u001b[37m────────────────────────────────────────────────────────────────────────────────\u001b[39m\u001b[22m\r\r\n\u001b[2C\u001b[37mesc\u001b[1Cto\u001b[1Cinterrupt\u001b[39m\r\r\n\u001b[?2026l"]
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+[15.318166, "o", "\u001b]0;⠐ Claude Code\u0007"]
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+[15.627079, "o", "\u001b[?2026h\r\u001b[3C\u001b[7A\u001b[31ma\u001b[2C\u001b[93ml\u001b[39m\r\r\n\r\n\r\n\r\n\r\n\r\n\r\n\u001b[?2026l"]
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+[16.094007, "o", "\u001b[?2026h\r\u001b[13C\u001b[7A\u001b[31mlin\u001b[39m\r\r\n\r\n\r\n\r\n\r\n\r\n\r\n\u001b[?2026l"]
+[16.155877, "o", "\u001b[?2026h\r\u001b[7A\u001b[31m✢\u001b[39m\r\r\n\r\n\r\n\r\n\r\n\r\n\r\n\u001b[?2026l"]
+[16.267831, "o", "\u001b[?2026h\r\u001b[7A\u001b[31m·\u001b[39m\r\r\n\r\n\r\n\r\n\r\n\r\n\r\n\u001b[?2026l"]
+[16.279255, "o", "\u001b]0;⠂ Claude Code\u0007"]
+[16.42499, "o", "\u001b[?2026h\r\u001b[7A\u001b[97m●\u001b[1C\u001b[39mGot it! Let me know\u001b[1Cif\u001b[1Cyou\u001b[1Cneed\u001b[1Canything.\r\u001b[2C\u001b[1B \u001b[1C                                                  \r\u001b[1B\u001b[31m·\u001b[1CRazzle-dazzling… \r\u001b[1B\u001b[39m  ⎿  \u001b[37mTip: Use /memory to view and manage Claude memory\u001b[39m                          \r\u001b[1B   \r\u001b[2B\u001b[37m❯ \u001b[39m\u001b[7m \u001b[27m               \r\r\n\u001b[2m\u001b[37m────────────────────────────────────────────────────────────────────────────────\u001b[39m\u001b[22m\r\r\n\u001b[2C\u001b[37mesc\u001b[1Cto\u001b[1Cinterrupt\u001b[39m\r\r\n\u001b[?2026l"]
+[16.465844, "o", "\u001b[?2026h\u001b[2K\u001b[1A\u001b[2K\u001b[1A\u001b[2K\u001b[G\u001b[1A\r\u001b[4A\u001b[2m\u001b[37m────────────────────────────────────────────────────────────────────────────────\r\u001b[1B\u001b[39m\u001b[22m❯ \u001b[7m \u001b[1C\u001b[27m                                                  \r\u001b[1B\u001b[2m\u001b[37m────────────────────────────────────────────────────────────────────────────────\r\u001b[1B\u001b[39m\u001b[22m  \u001b[37m? for shortcuts\u001b[39m                                                               \r\u001b[1B                                                                                \r\u001b[1B                                                                                \r\u001b[1B                                                                                \r\u001b[2A\u001b[?2026l"]
+[16.466036, "o", "\u001b]0;✳ Claude Code\u0007"]
+[16.466216, "o", "\u001b]0;✳ Claude Code\u0007"]
+[19.078841, "o", "\u001b[?2026h\r\u001b[2C\u001b[3A\u001b[7mw\u001b[27m\u001b[2mhat's in this repo?\u001b[22m\r\r\n\r\n\r\n\u001b[?2026l"]
diff --git a/e2e/cast/testdata/claude.txt b/e2e/cast/testdata/claude.txt
new file mode 100644
index 0000000..ef8d840
--- /dev/null
+++ b/e2e/cast/testdata/claude.txt
@@ -0,0 +1,4 @@
+user	hello
+agent	Hello! How can I help you today?
+user	This is just a test.
+agent	Got it! Let me know if you need anything.