feat(#2039): drop is_primary from get_agent_meta matrix identities

hive-ag3nt/src/mcp.rs

@@ -510,12 +510,7 @@ pub fn format_agent_meta(resp: Result<SocketReply, anyhow::Error>) -> String {
                 out.push_str("\nmatrix_accounts:");
                 for acct in &matrix_accounts {
                     let uid = acct.user_id.as_deref().unwrap_or("?");
-                    let primary = if acct.is_primary { " [primary]" } else { "" };
-                    let _ = write!(
-                        out,
-                        "\n  {} ({uid}) on {}{primary}",
-                        acct.name, acct.homeserver
-                    );
+                    let _ = write!(out, "\n  {} ({uid}) on {}", acct.name, acct.homeserver);
                 }
             }
             out

hive-sh4re/src/lib.rs

@@ -926,7 +926,8 @@ pub struct AgentStatusRow {
 /// `matrix_accounts`. Field names match the daemon's `matrix-accounts.json`
 /// snapshot (written by `hive-matrix-mcp`'s account registry) so hive-c0re
 /// deserializes the snapshot straight into `Vec<MatrixIdentity>`; the
-/// snapshot's `live` field is ignored here (only live accounts are listed).
+/// snapshot's `live` / `is_primary` fields are ignored here (only live
+/// accounts are listed).
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct MatrixIdentity {
     /// Logical account name (the `account` arg on the matrix MCP tools).
@@ -937,9 +938,6 @@ pub struct MatrixIdentity {
     pub user_id: Option<String>,
     /// Homeserver base URL this account is on.
     pub homeserver: String,
-    /// Whether this is the primary account (selected when a matrix tool
-    /// call omits `account`).
-    pub is_primary: bool,
 }
 
 /// Serde default for the `running` field; keeps wire backwards-compat