docs: document quoted tweet depth

README.md

@@ -69,6 +69,7 @@ bird query-ids --fresh
 
 Global options:
 - `--timeout <ms>`: abort requests after the given timeout (milliseconds).
+- `--quote-depth <n>`: max quoted tweet depth in JSON output (default: 1; 0 disables).
 - `--plain`: stable output (no emoji, no color).
 - `--no-emoji`: disable emoji output.
 - `--no-color`: disable ANSI colors (or set `NO_COLOR=1`).
@@ -108,12 +109,14 @@ Example `~/.config/bird/config.json5`:
   // Cookie source order for browser extraction (string or array)
   cookieSource: ["firefox", "safari"],
   firefoxProfile: "default-release",
-  timeoutMs: 20000
+  timeoutMs: 20000,
+  quoteDepth: 1
 }
 ```
 
 Environment shortcuts:
 - `BIRD_TIMEOUT_MS`
+- `BIRD_QUOTE_DEPTH`
 
 ## Output
 
@@ -130,14 +133,14 @@ When using `--json`, tweet objects include:
 | `id` | string | Tweet ID |
 | `text` | string | Full tweet text (includes Note/Article content when present) |
 | `author` | object | `{ username, name }` |
-| `authorId` | string | Author's user ID |
+| `authorId` | string? | Author's user ID |
 | `createdAt` | string | Timestamp |
 | `replyCount` | number | Number of replies |
 | `retweetCount` | number | Number of retweets |
 | `likeCount` | number | Number of likes |
 | `conversationId` | string | Thread conversation ID |
 | `inReplyToStatusId` | string? | Parent tweet ID (present if this is a reply) |
-| `quotedTweet` | object? | Embedded quote tweet with `{ id, text, author, authorId }` (present if this is a quote tweet) |
+| `quotedTweet` | object? | Embedded quote tweet (same schema; depth controlled by `--quote-depth`) |
 
 ## Query IDs (GraphQL)