diff --git a/docs/branding.md b/docs/branding.md
index 5867bee..d0f1a74 100644
--- a/docs/branding.md
+++ b/docs/branding.md
@@ -16,7 +16,7 @@ Everything that ties Orbit to a particular network or brand lives in
     "url": "https://example.org",
     "tagline": "Chat with",
     "taglineEm": "everyone.",
-    "subtitle": "Public rooms, private messages, no signup required."
+    "subtitle": "Public rooms, private messages, and moderation that works."
   }
 }
 ```
diff --git a/docs/overview.md b/docs/overview.md
index c054706..ff34b8d 100644
--- a/docs/overview.md
+++ b/docs/overview.md
@@ -3,16 +3,18 @@ Order: 10
 
 # Overview
 
-**Orbit** is a modern web client for **IRC** — the open chat protocol that has quietly run
-communities for decades. It runs entirely in the browser: pick a nick and you're talking, with
-**no install and no signup**.
+**Orbit** is a modern web client for **IRC**, the open chat protocol that has quietly run
+communities for decades. It runs entirely in the browser, with nothing to install, and handles
+everything from a quick guest nick to a full account (SASL login and in-app registration).
+Whether a deployment lets people in as guests or asks them to register is its own choice, not
+the client's.
 
 It powers [tchatou.fr](https://tchatou.fr/app/), and is built to be **re-pointed at any IRCv3
-network** and **rebranded** from a single `config.json` — without recompiling.
+network** and **rebranded** from a single `config.json`, without recompiling.
 
 ## What makes it different
 
-- **Full IRCv3.** Orbit negotiates 24 capabilities — SASL, message-tags, reactions, typing
+- **Full IRCv3.** Orbit negotiates 25 capabilities: SASL, message-tags, reactions, typing
   indicators, read-markers, multi-line messages, server-side history, account registration, and
   Web Push. See [IRCv3 capabilities](https://orbit.tchatou.fr/docs/ircv3/).
 - **Pluggable at runtime.** A static `config.json` is fetched on startup and sets the server,
@@ -25,11 +27,11 @@ network** and **rebranded** from a single `config.json` — without recompiling.
   Brazilian + European Portuguese). Pin a default with `defaults.lang`.
 - **Self-hostable.** A static build behind any web server. The project even runs its own git
   server with [push-to-deploy](https://orbit.tchatou.fr/docs/push-to-deploy/).
-- **Free software.** AGPL-3.0 — use it, modify it, self-host it.
+- **Free software.** AGPL-3.0: use it, modify it, self-host it.
 
 ## Tech
 
-React 19 · TypeScript · Vite · zustand. Tested with Vitest, linted, and built in CI. The codebase
-is a clean modular tree — see [Architecture](https://orbit.tchatou.fr/docs/architecture/).
+React 19, TypeScript, Vite and zustand. Tested with Vitest, linted, and built in CI. The codebase
+is a clean modular tree; see [Architecture](https://orbit.tchatou.fr/docs/architecture/).
 
-> New here? Jump to the [Quick start](https://orbit.tchatou.fr/docs/quick-start/) to run your own in a minute.
+> New here? Jump to the [Quick start](https://orbit.tchatou.fr/docs/quick-start/) to run your own.
diff --git a/docs/plugins.md b/docs/plugins.md
index 1f46075..b12b623 100644
--- a/docs/plugins.md
+++ b/docs/plugins.md
@@ -21,7 +21,14 @@ Add script URLs to `plugins` in [`config.json`](https://orbit.tchatou.fr/docs/co
 ```
 
 They load in order, after the app boots. Host them anywhere the page can reach
-(same-origin recommended).
+(same-origin recommended). For a third-party origin, pin the file with
+Subresource Integrity by giving an object instead of a URL:
+
+```json
+{ "plugins": [{ "url": "https://cdn.example/x.js", "integrity": "sha384-…" }] }
+```
+
+(`crossorigin` defaults to `anonymous` when an `integrity` hash is set.)
 
 ## A quick plugin
 
@@ -79,6 +86,8 @@ instead. See **[Compiled plugins](https://orbit.tchatou.fr/docs/compiled-plugins
 | `orbit.i18n.pick(table)` | pick a string from a `{ lang: text }` table by the current language |
 | `orbit.addUi(slot, render)` | add UI to a slot (returns a remover) |
 | `orbit.addSettingsSection({label, icon?, render})` | add a whole Settings section |
+| `orbit.addMessageDecorator(m => …)` | inline UI after every message's text; `m` = `{id, nick, text, raw, kind, ts, mine}` (`text` is formatting-stripped, `raw` keeps mIRC codes) |
+| `orbit.addMessageAction(m => …)` | a button in every message's hover action toolbar (next to reply/react); same `m` |
 | `orbit.h / orbit.html` | render helpers |
 | `log(…)` | namespaced console logger |
 
@@ -93,10 +102,16 @@ instead. See **[Compiled plugins](https://orbit.tchatou.fr/docs/compiled-plugins
 | Slot | Where |
 |---|---|
 | `composer_button` | a button in the message composer toolbar |
+| `topbar_item` | an item in the channel topbar action row (next to search / notifications) |
+| `sidebar_item` | an item in the conversation sidebar header (next to the compose button) |
 | `settings_section` | a whole section in Settings (own nav entry + pane) — use `orbit.addSettingsSection()` |
 
-More slots (message decorators, side panels) will be added as the core grows
-stable homes for them.
+Two per-message hooks run for every rendered message:
+`orbit.addMessageDecorator(m => …)` appends inline UI after the text, and
+`orbit.addMessageAction(m => …)` adds a button to the hover action toolbar next
+to reply/react. Every contributed slot, action and decorator renders inside its
+own error boundary, so a crashing plugin renders nothing instead of taking down
+the app.
 
 ### Localization (i18n)