diff --git a/e2e/kane/.gitignore b/e2e/kane/.gitignore
new file mode 100644
index 0000000..38c4d2b
--- /dev/null
+++ b/e2e/kane/.gitignore
@@ -0,0 +1,2 @@
+.testmuai/
+output-*/
diff --git a/e2e/kane/README.md b/e2e/kane/README.md
new file mode 100644
index 0000000..f83476c
--- /dev/null
+++ b/e2e/kane/README.md
@@ -0,0 +1,22 @@
+# End-to-end (e2e) tests for web
+
+Browser tests written in plain English for [Kane CLI](https://www.testmuai.com/kane-cli/).
+
+| Test | What it covers |
+|---|---|
+| `vault_test.md` | Registering and creating a vault |
+| `note_test.md` | Registering, creating a vault and a note, and checking the note is saved after a reload |
+
+## Run
+
+Start a fresh instance on port 4880:
+
+```bash
+docker run -d --name many-notes-e2e -p 4880:8080 -e APP_URL=http://localhost:4880 brufdev/many-notes:latest
+npm install -g @testmuai/kane-cli
+kane-cli login
+kane-cli testmd run e2e/kane/vault_test.md
+kane-cli testmd run e2e/kane/note_test.md
+```
+
+Both tests register a new user, so recreate the container before each run.
diff --git a/e2e/kane/note_test.md b/e2e/kane/note_test.md
new file mode 100644
index 0000000..7593338
--- /dev/null
+++ b/e2e/kane/note_test.md
@@ -0,0 +1,21 @@
+---
+mode: testing
+url: http://localhost:4880/register
+max_steps: 50
+---
+
+# Write a note
+
+## Register and create a vault
+Type "Sam Rivera" as the Name, "sam@example.com" as the Email and "Notes-Test-2026" as both the Password and Confirm password, then click "Register".
+Click the "Create vault" button, type "Journal" as the Name and click "Save".
+Verify the vault page opens with the title "Journal".
+
+## Create a note
+Click the "New note" button, type "Standup" as the Name and click "Save".
+Click into the empty editor area below the toolbar and type "Ship the release on Friday".
+Wait 3 seconds for the note to save.
+
+## Check the note is saved
+Reload the page.
+Verify the note "Standup" is open and shows "Ship the release on Friday".
diff --git a/e2e/kane/vault_test.md b/e2e/kane/vault_test.md
new file mode 100644
index 0000000..8af173a
--- /dev/null
+++ b/e2e/kane/vault_test.md
@@ -0,0 +1,15 @@
+---
+mode: testing
+url: http://localhost:4880/register
+max_steps: 40
+---
+
+# Sign up and create a vault
+
+## Register
+Type "Alex Morgan" as the Name, "alex@example.com" as the Email and "Notes-Test-2026" as both the Password and Confirm password, then click "Register".
+Verify the "My vaults" page lists "Starter Vault".
+
+## Create a vault
+Click the "Create vault" button, type "Work" as the Name and click "Save".
+Verify the vault page opens with the title "Work".