bxctl: chat --speaker NAME, the speaker on every turn of the chat

Co-Authored-By: ornith-1.5-35b-a3b <agent@wntrmute.dev>

crates/bxctl/src/cli.rs

@@ -9,8 +9,9 @@ use bxcore::SessionId;
 pub const USAGE: &str = "\
 usage: bxctl <command> [options]
 
-  bxctl chat [--socket PATH] [--admin-socket PATH] [--session ID] [--say TEXT] [--no-thinking] [--json]
+  bxctl chat [--socket PATH] [--admin-socket PATH] [--session ID] [--say TEXT] [--no-thinking] [--json] [--speaker NAME]
       Talk to loopd.
+      With --speaker NAME (no spaces), the turns are NAME's and are synced to Honcho as that person.
 
   bxctl approvals [--admin-socket PATH]
       List the approvals waiting for a decision.
@@ -50,6 +51,9 @@ pub struct ChatOptions {
     pub show_thinking: bool,
     pub say: Option<String>,
     pub json: bool,
+    /// Who is typing, from `--speaker`, sent on every turn (M5c spec, section 11). There is no
+    /// default: without the flag it is `None`, and a turn without a speaker is not synced.
+    pub speaker: Option<String>,
 }
 
 impl ChatOptions {
@@ -61,6 +65,7 @@ impl ChatOptions {
             show_thinking: true,
             say: None,
             json: false,
+            speaker: None,
         }
     }
 }
@@ -143,6 +148,14 @@ fn parse_chat(args: &[String], home: &Path) -> Result<Command, UsageError> {
             "--admin-socket" => opts.admin_socket = PathBuf::from(value_at(args, i)?),
             "--session" => opts.session = Some(parse_session(&value_at(args, i)?)?),
             "--say" => opts.say = Some(value_at(args, i)?),
+            // Given twice, it is refused rather than one of them chosen: the turns would be synced
+            // as the wrong person.
+            "--speaker" => {
+                if opts.speaker.is_some() {
+                    return Err(UsageError);
+                }
+                opts.speaker = Some(parse_speaker(&value_at(args, i)?)?);
+            }
             "--no-thinking" => {
                 opts.show_thinking = false;
                 i += 1;
@@ -305,6 +318,15 @@ fn parse_session(value: &str) -> Result<SessionId, UsageError> {
     }
 }
 
+// A speaker must be a name: not empty, and no whitespace or control character anywhere. The rest,
+// Honcho's pattern, is `memoryd`'s to check (M5c spec, section 3); a `.` is kept as it is.
+fn parse_speaker(value: &str) -> Result<String, UsageError> {
+    if value.is_empty() || value.chars().any(|c| c.is_whitespace() || c.is_control()) {
+        return Err(UsageError);
+    }
+    Ok(value.to_string())
+}
+
 // A refuse reason must be present; its content is unvalidated on the client.
 fn verify_reason(reason: &str) -> Result<String, UsageError> {
     if reason.is_empty() {