diff --git a/cmd/genfixtures/main.go b/cmd/genfixtures/main.go
new file mode 100644
index 0000000..19f118c
--- /dev/null
+++ b/cmd/genfixtures/main.go
@@ -0,0 +1,89 @@
+// Command genfixtures writes the Go-generated compatibility fixtures that the
+// Rust port must read unchanged. Run from the repo root:
+//
+//	go run ./cmd/genfixtures rust/core/tests/fixtures
+package main
+
+import (
+	"log"
+	"os"
+	"path/filepath"
+	"time"
+
+	"github.com/andydixon/link/internal/exportimport"
+	"github.com/andydixon/link/internal/models"
+	"github.com/andydixon/link/internal/recording"
+	"github.com/andydixon/link/internal/secrets"
+	"github.com/andydixon/link/internal/storage"
+)
+
+func must(err error) {
+	if err != nil {
+		log.Fatal(err)
+	}
+}
+
+func main() {
+	out := os.Args[1]
+	must(os.RemoveAll(out))
+	must(os.MkdirAll(out, 0o755))
+
+	store, err := storage.NewStore(filepath.Join(out, "link.db"))
+	must(err)
+	ts := time.Date(2026, 1, 2, 3, 4, 5, 0, time.UTC)
+	var profiles []models.Profile
+	for i, proto := range []models.Protocol{models.ProtocolSSH, models.ProtocolTelnet, models.ProtocolRAW, models.ProtocolGitHub, models.ProtocolVNC, models.ProtocolIRC} {
+		p := models.NewProfile(proto)
+		p.ID = "00000000-0000-0000-0000-00000000000" + string(rune('1'+i))
+		p.DisplayName = "Fixture " + string(proto)
+		p.Host = "host-" + string(proto) + ".example"
+		p.Tags = []string{"fixture", string(proto)}
+		p.Folder = "Fixtures"
+		p.Notes = "notes ✓"
+		p.CreatedAt, p.UpdatedAt = ts, ts
+		switch proto {
+		case models.ProtocolSSH:
+			p.Username = "alice"
+			p.Favourite = true
+			p.LastConnected = &ts
+			p.SSH.PrivateKeyPath = "/home/alice/.ssh/id_ed25519"
+			p.SSH.JumpHosts = []models.JumpHost{{Host: "jump.example", Port: 2222, Username: "bob", AuthMethod: "publickey", SecretMode: models.SecretModeSaved}}
+			p.SSH.PortForwards = []models.PortForward{{ID: "pf1", Direction: models.PortForwardLocal, BindHost: "127.0.0.1", BindPort: 8080, DestHost: "localhost", DestPort: 80, Enabled: true, Label: "web"}}
+			p.SSH.EnvVars = map[string]string{"LANG": "en_GB.UTF-8"}
+			p.SSH.LoginScripts = []models.LoginScriptStep{{Type: "wait", Value: "$ ", Timeout: 5}, {Type: "send", Value: "uptime"}}
+			p.SSH.ProxyType = "socks5"
+			p.SSH.ProxyHost = "proxy.example"
+			p.SSH.ProxyPort = 1080
+			p.SSH.AutoReconnect = true
+		case models.ProtocolRAW:
+			p.RAW.PayloadPresets = []models.PayloadPreset{{ID: "pp1", Name: "hello", Payload: "aGVsbG8=", Format: "text"}}
+		case models.ProtocolIRC:
+			p.IRC.AutoJoinRooms = []string{"#rust", "#go"}
+			p.IRC.UseTLS = true
+		}
+		must(store.CreateProfile(&p))
+		profiles = append(profiles, p)
+	}
+	must(store.SaveKnownHost(&models.KnownHost{ID: "kh1", Host: "host-ssh.example", Port: 22, KeyType: "ssh-ed25519", Fingerprint: "SHA256:abc", PublicKey: "AAAA", FirstSeen: ts, LastSeen: ts, Trusted: true}))
+	must(store.CreateSnippet(&models.Snippet{ID: "sn1", Name: "uptime", Command: "uptime", Description: "load", Folder: "ops", Tags: []string{"x"}, CreatedAt: ts, UpdatedAt: ts}))
+	must(store.SaveIRCLastRooms(profiles[5].ID, []string{"#rust", "#nexus"}))
+	prefs := models.DefaultAppPreferences()
+	prefs.TerminalTheme = "dracula"
+	prefs.SidebarWidth = 320
+	must(store.SavePreferences(&prefs))
+	must(store.Close())
+
+	vault := secrets.NewSecretStore(filepath.Join(out, "vault"))
+	must(vault.Initialise("correct horse battery staple"))
+	must(vault.SetSecret("profile:00000000-0000-0000-0000-000000000001:password", "s3cret-ssh"))
+	must(vault.SetSecret("profile:00000000-0000-0000-0000-000000000001:totp", "JBSWY3DPEHPK3PXP"))
+
+	must(exportimport.EncryptAndExport(profiles, "export-pass", filepath.Join(out, "profiles.link")))
+
+	rec, err := recording.NewRecorder(filepath.Join(out, "recordings"), "rec1", "Fixture — host", 80, 24)
+	must(err)
+	rec.WriteOutput([]byte("hello \x1b[1mworld\x1b[0m\r\n"))
+	rec.WriteInput([]byte("ls\r"))
+	must(rec.Close())
+	log.Println("fixtures written to", out)
+}
diff --git a/rust/core/tests/fixtures/profiles.link b/rust/core/tests/fixtures/profiles.link
new file mode 100644
index 0000000..cf045f9
Binary files /dev/null and b/rust/core/tests/fixtures/profiles.link differ
diff --git a/rust/core/tests/fixtures/recordings/rec1.cast b/rust/core/tests/fixtures/recordings/rec1.cast
new file mode 100644
index 0000000..78a78ee
--- /dev/null
+++ b/rust/core/tests/fixtures/recordings/rec1.cast
@@ -0,0 +1,3 @@
+{"version":2,"width":80,"height":24,"timestamp":1791633486,"title":"Fixture — host","env":{"TERM":"xterm-256color"}}
+[0.000139144,"o","hello \u001b[1mworld\u001b[0m\r\n"]
+[0.000212149,"i","ls\r"]