diff --git a/docs/ARCHITECTURE.md b/docs/ARCHITECTURE.md
index f12dd42..e6faa25 100644
--- a/docs/ARCHITECTURE.md
+++ b/docs/ARCHITECTURE.md
@@ -8,7 +8,7 @@ frontend (same origin, no CORS). Persistence is SQLite via Bun's native
 browser ──► Bun.serve (src/index.ts)
               ├─ /api/* ──► auth gate ──► routes ──► db.ts ──► kisassistant.db
               │                              └─────► DriverRegistry ──► ollama / APIs
-              └─ /* ──► static files + SPA fallback (index.html, covers /share/:id)
+              └─ /* ──► static files + SPA fallback (index.html, covers /share/:id and /chat/:id)
 ```
 
 ## Request flow: chat
diff --git a/docs/FRONTEND.md b/docs/FRONTEND.md
index e59d9f2..5064506 100644
--- a/docs/FRONTEND.md
+++ b/docs/FRONTEND.md
@@ -15,6 +15,10 @@ No router library — a tiny history wrapper (`lib/route.ts`: `navigate()`,
 - `/register` — full-page self-registration (`RegisterPage.tsx`; key shown
   once, then hands username+key to `/login` via `sessionStorage`). No splash.
 - `/chat` — the platform itself (auth required; boots behind the splash).
+  Bare `/chat` is the empty composer (new chat, created lazily on first send).
+- `/chat/:id` — one conversation page (deep-linkable, back/forward supported).
+  Selecting a chat navigates there; unknown ids bounce back to `/chat`.
+  Archived chats are viewed read-only on bare `/chat` (no per-id URL).
 - `/` — redirects to `/chat` when logged in, `/login` otherwise (placeholder
   for a future landing page).
 - Public routes (unchanged): `/share/:publicId`, `/reset/:token`,