feat: rebuild AI commands and migrate config to TOML

app/commands/core.py

@@ -106,18 +106,6 @@ def require_args_check() -> CommandCheck:
     return CommandCheck("require_args", _check, "Require non-empty arguments")
 
 
-def combine_checks(*checks: CommandCheck) -> CommandCheck:
-    async def _check(ctx: "CommandContext") -> CheckResult:
-        for check in checks:
-            result = await check.run(ctx)
-            if not result.allowed:
-                return result
-        return CheckResult.allow()
-
-    names = "+".join(check.name for check in checks) or "combined"
-    return CommandCheck(names, _check, "Combined checks")
-
-
 @dataclass(slots=True)
 class CommandContext:
     client: "Client"
@@ -208,9 +196,6 @@ class CommandDefinition:
             return self.owner_prefix
         return self.owner_prefix if is_owner else self.guest_prefix
 
-    def accepts_prefix(self, prefix: str, *, is_owner: bool) -> bool:
-        return prefix == self.expected_prefix(is_owner)
-
     def help_line(self, ctx: CommandContext | None = None) -> str:
         usage = self.usage or self.display_name
         details: list[str] = []
@@ -342,9 +327,6 @@ class CommandRegistry:
         canonical = self._aliases.get(normalized, normalized)
         return self._commands.get(canonical)
 
-    def has_name(self, token: str) -> bool:
-        return self.resolve(token) is not None
-
     def iter_commands(self) -> list[CommandDefinition]:
         return [self._commands[name] for name in self._order]