diff --git a/AGENTS.md b/AGENTS.md
index a039d59..df186d6 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -12,7 +12,7 @@
   - Bestehende Features dürfen nicht unbemerkt geändert oder ersetzt werden.
   - Notwendige Anpassungen zur Koexistenz mehrerer Features müssen klar erkennbar sein.
 - **Hilfe-Ansicht aktuell halten**:
-  - Änderungen und/oder Erweiterungen müssen **immer** die neue Hilfe-Ansicht automatisch aktualisieren.
+  - Änderungen und/oder Erweiterungen müssen **immer** die `:help`-Dokumentation, die README.md und die `quick-help`-Ansicht (via `?`) automatisch aktualisieren.
   - Sprache der Hilfe ist wie die README.md immer **englisch**.
 
 ## Projektziel
diff --git a/README.md b/README.md
index b441a6f..c734bc8 100644
--- a/README.md
+++ b/README.md
@@ -59,6 +59,7 @@ If no runner matches the current test file, test-samurai will show:
 - `TSamLast` -> `<leader>tl`
 - `TSamFailedOnly` -> `<leader>te`
 - `TSamShowOutput` -> `<leader>to`
+- Help: `:help test-samurai`
 
 Additional keymaps:
 
diff --git a/doc/tags b/doc/tags
new file mode 100644
index 0000000..d4194e9
--- /dev/null
+++ b/doc/tags
@@ -0,0 +1,9 @@
+test-samurai	test-samurai.txt	/*test-samurai*
+test-samurai-commands	test-samurai.txt	/*test-samurai-commands*
+test-samurai-default-keys	test-samurai.txt	/*test-samurai-default-keys*
+test-samurai-quickhelp	test-samurai.txt	/*test-samurai-quickhelp*
+test-samurai-req	test-samurai.txt	/*test-samurai-req*
+test-samurai-runners	test-samurai.txt	/*test-samurai-runners*
+test-samurai-setup	test-samurai.txt	/*test-samurai-setup*
+test-samurai-ui	test-samurai.txt	/*test-samurai-ui*
+test-samurai.txt	test-samurai.txt	/*test-samurai.txt*
diff --git a/doc/test-samurai.txt b/doc/test-samurai.txt
new file mode 100644
index 0000000..74e8406
--- /dev/null
+++ b/doc/test-samurai.txt
@@ -0,0 +1,83 @@
+*test-samurai.txt*  Run tests with a unified UX
+
+INTRODUCTION                                                    *test-samurai*
+
+Test Samurai provides a unified UX to run tests across languages
+and frameworks, backed by an extensible runner architecture.
+
+
+REQUIREMENTS                                               *test-samurai-req*
+
+Neovim 0.11.4 or later is required.
+
+
+SETUP                                                    *test-samurai-setup*
+
+This plugin ships without built-in runners. Configure runner modules
+in your setup so test commands and keymaps work properly:
+
+>
+  require("test-samurai").setup({
+    runner_modules = {
+      "my-runners.go",
+      "my-runners.js",
+    },
+  })
+<
+
+
+COMMANDS                                            *test-samurai-commands*
+
+:TSamNearest        Run the nearest test.
+:TSamFile           Run all tests in the current file.
+:TSamAll            Run all tests in the project.
+:TSamLast           Re-run the last test command.
+:TSamFailedOnly     Re-run only previously failed tests.
+:TSamShowOutput     Reopen the Testing-Float output window.
+
+
+DEFAULT KEYMAPS                                   *test-samurai-default-keys*
+
+TSamNearest        <leader>tn
+TSamFile           <leader>tf
+TSamAll            <leader>ta
+TSamLast           <leader>tl
+TSamFailedOnly     <leader>te
+TSamShowOutput     <leader>to
+
+
+QUICK-HELP & FLOATS                                   *test-samurai-quickhelp*
+
+In the Testing-Float, press ? to open the quick-help in the Detail-Float.
+
+Additional keymaps:
+  <leader>qn    Close floats + jump to the first quickfix entry
+  <leader>nf    Next [ FAIL ] in listing
+  <leader>pf    Previous [ FAIL ] in listing
+  <leader>o     Jump to test location
+  <leader>z     Toggle Detail-Float full width
+  <C-l>         Focus Detail-Float (press l again for full)
+  <C-h>         Focus Test-Listing-Float
+  <esc><esc>    Close Testing-Float
+  <C-c>         Close Detail-Float (when focused)
+
+
+OUTPUT UI                                                     *test-samurai-ui*
+
+Testing-Float: container floating window for output.
+Test-Listing-Float: left subwindow listing test results.
+Detail-Float: right subwindow showing detailed output for a test.
+
+After running a test command, the UI opens in listing mode (only the
+Test-Listing-Float is visible). Press <cr> on a [ FAIL ] entry to open
+the Detail-Float with a 20/80 split. ANSI colors are translated only
+inside the Detail-Float.
+
+
+RUNNER ARCHITECTURE                                       *test-samurai-runners*
+
+Runners are standalone Lua modules that implement the full interface.
+See README.md for the required functions and runner guidelines.
+
+==============================================================================
+vim:ft=help