Translate dashes to underscores for Telegram bot commands

Pi command names like compact-now were silently dropped from
setMyCommands because Telegram requires names to match
^[a-z0-9_]{1,32}$ - no dashes. They showed up in /help (which
iterates pi.getCommands() directly) but were untypable via
autocomplete and, even when typed manually, fell through to the
agent as plain text rather than dispatching.

Now: register the underscore-translated form with Telegram, show the
underscore form in /help so it matches what the user sees in the
menu, and on dispatch rewrite the message text from /foo_bar back to
/foo-bar before enqueueing so the harness's slash-command parser
finds the registered command.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

index.ts

@@ -76,9 +76,11 @@ import {
 } from "./lib/queue.ts";
 import {
   buildTelegramBotCommands,
+  fromTelegramCommandName,
   registerTelegramAttachmentTool,
   registerTelegramCommands,
   registerTelegramLifecycleHooks,
+  toTelegramCommandName,
 } from "./lib/registration.ts";
 import {
   MAX_MESSAGE_LENGTH,
@@ -1892,7 +1894,9 @@ export default function (pi: ExtensionAPI) {
       );
       for (const c of sorted) {
         const desc = c.description ? ` — ${c.description}` : "";
-        lines.push(`/${c.name}${desc}`);
+        // Show the Telegram-form (dashes -> underscores) since that's what
+        // the user has to type. The bridge translates back on dispatch.
+        lines.push(`/${toTelegramCommandName(c.name)}${desc}`);
       }
     }
     lines.push("", "/help re-syncs Telegram's command menu.");
@@ -1973,6 +1977,25 @@ export default function (pi: ExtensionAPI) {
     );
     if (handled) return;
 
+    // Pi commands with dashes are exposed in Telegram with underscores
+    // (Telegram bot command names disallow dashes). If the user typed the
+    // underscore form, rewrite the message text to the original dashed form
+    // so the harness's slash-command parser dispatches it correctly.
+    if (command) {
+      const piCommandNames = new Set(pi.getCommands().map((c) => c.name));
+      const original = fromTelegramCommandName(command.name, piCommandNames);
+      if (original !== command.name) {
+        const rewritten = command.args
+          ? `/${original} ${command.args}`
+          : `/${original}`;
+        if (firstMessage.text !== undefined) {
+          firstMessage.text = rewritten;
+        } else if (firstMessage.caption !== undefined) {
+          firstMessage.caption = rewritten;
+        }
+      }
+    }
+
     await enqueueTelegramTurn(messages, ctx);
   }