Add Discord role inheritance via parent traversal and discordImplies

- Add discordImplies field to Role interface for Discord-specific role hierarchy
- Add expandDiscordRoles() function to traverse both GitHub parent chain
  and discordImplies relationships when syncing Discord roles
- SDK_MAINTAINERS now implies MAINTAINERS for Discord

This ensures that users with SDK roles (GO_SDK, PYTHON_SDK, etc.) automatically
get the 'maintainers (synced)' Discord role through:
  GO_SDK -> SDK_MAINTAINERS (via GitHub parent) -> MAINTAINERS (via discordImplies)

Claude-Generated-By: Claude Code (cli/claude-opus-4-5=100%)
Claude-Steers: 5
Claude-Permission-Prompts: 1
Claude-Escapes: 0

src/config/roles.ts

@@ -38,6 +38,12 @@ export interface Role {
   github?: GitHubConfig;
   discord?: DiscordConfig;
   google?: GoogleConfig;
+  /**
+   * Roles that are implied for Discord membership.
+   * If a user has this role, they automatically get the implied roles' Discord roles too.
+   * This is separate from GitHub parent relationships and allows Discord-specific hierarchy.
+   */
+  discordImplies?: readonly RoleId[];
 }
 
 /**
@@ -135,6 +141,7 @@ export const ROLES: readonly Role[] = [
     description: 'Authors and maintainers of official MCP SDKs',
     github: { team: 'sdk-maintainers', parent: ROLE_IDS.STEERING_COMMITTEE },
     discord: { role: 'sdk maintainers (synced)' },
+    discordImplies: [ROLE_IDS.MAINTAINERS], // SDK maintainers are also general maintainers
   },
   {
     id: ROLE_IDS.CSHARP_SDK,

src/discord.ts

@@ -398,6 +398,38 @@ const roleLookup = buildRoleLookup();
 // Discord roles keyed by Discord role name
 const roles: Record<string, DiscordRole> = {};
 
+/**
+ * Expand a set of role IDs to include all implied Discord roles.
+ * This traverses:
+ * 1. GitHub parent relationships (e.g., GO_SDK -> SDK_MAINTAINERS)
+ * 2. discordImplies relationships (e.g., SDK_MAINTAINERS -> MAINTAINERS)
+ */
+function expandDiscordRoles(roleIds: readonly RoleId[]): Set<RoleId> {
+  const expanded = new Set<RoleId>();
+  const toProcess = [...roleIds];
+
+  while (toProcess.length > 0) {
+    const roleId = toProcess.pop()!;
+    if (expanded.has(roleId)) continue;
+    expanded.add(roleId);
+
+    const role = roleLookup.get(roleId);
+    if (!role) continue;
+
+    // Follow GitHub parent relationship
+    if (role.github?.parent) {
+      toProcess.push(role.github.parent);
+    }
+
+    // Follow discordImplies relationships
+    if (role.discordImplies) {
+      toProcess.push(...role.discordImplies);
+    }
+  }
+
+  return expanded;
+}
+
 // Only create Discord resources if Discord is enabled
 if (DISCORD_ENABLED) {
   // These are guaranteed to be defined when DISCORD_ENABLED is true
@@ -424,8 +456,11 @@ if (DISCORD_ENABLED) {
   MEMBERS.forEach((member) => {
     if (!member.discord) return;
 
+    // Expand roles to include parents and implied roles
+    const expandedRoleIds = expandDiscordRoles(member.memberOf);
+
     // Get the Discord role IDs this member should have
-    const expectedRoleIds = member.memberOf
+    const expectedRoleIds = Array.from(expandedRoleIds)
       .map((roleId: RoleId) => {
         const role = roleLookup.get(roleId);
         if (!role?.discord) return null;