Filter noisy messages

README.md

@@ -63,11 +63,13 @@ running Mudmouth, validation, and multi-platform release packaging.
 
 ## Data and privacy
 
-Mudmouth writes only two human-readable files in the operating system's
+Mudmouth writes only three human-readable files in the operating system's
 standard application-data directory:
 
 - `config.toml` — endpoint, log path, event toggles, and playback settings
 - `speakers.json` — NPC names, voice modes, and last-seen context
+- `filters.toml` — dialogue prefixes to ignore; created with the default
+  ambient-NPC and combat-chatter filters
 
 On Linux this is normally `~/.local/share/mudmouth`; the equivalent platform
 directory is used on macOS and Windows.
@@ -79,3 +81,11 @@ repeat_window_seconds = 15
 repeat_second_speed = 1.5
 repeat_third_plus_speed = 2.0
 ```
+
+To ignore additional repetitive dialogue, edit `filters.toml` and add literal
+prefixes. For example:
+
+```toml
+speaker_prefixes = ["A ", "An "]
+text_prefixes = ["Time to die, ", "Guards! "]
+```