Add Discord role sync with role-centric architecture (#22)

* Add Discord role sync with role-centric architecture

This refactors the access management to use a role-centric model where
each role explicitly defines which platforms it exists on (GitHub,
Discord, Google).

Key changes:
- Add Discord role sync via Pulumi Dynamic Provider
- Replace groups.ts with roleIds.ts + roles.ts for type-safe role definitions
- Use ROLE_IDS constants to prevent typos in memberOf references
- Each role has platform-specific config (github/discord/google keys)
- Discord-only roles (e.g., administrators) and GitHub-only roles
  (e.g., typescript-sdk-auth) are now explicitly modeled
- Add PR preview workflow to show Pulumi changes before merge
- Add test-config.ts for config structure validation
- Fix typo: docs-maintaners -> docs-maintainers

Discord roles will match existing server roles:
- administrators, lead maintainers, core maintainers
- sdk maintainers, working groups, interest groups
- etc.

Requires new GitHub secrets:
- DISCORD_BOT_TOKEN
- DISCORD_GUILD_ID

* Fix GitHub team ordering and make Discord integration optional

- Add topological sort for GitHub teams to ensure parent teams are
  created before child teams, fixing the registry-wg parentTeamId issue
- Make Discord integration optional by using config.get() instead of
  config.require(), allowing CI preview to succeed without Discord secrets
- Add sortRolesByGitHubDependency() utility function in config/utils.ts

Claude-Generated-By: Claude Code (cli/claude-opus-4-5=20%)
Claude-Steers: 2
Claude-Permission-Prompts: 1
Claude-Escapes: 0

* Reconcile Discord roles for listed users

Replace per-role-membership approach with per-user role sync that:
- Adds missing roles users should have
- Removes managed roles users shouldn't have
- Only touches roles defined in config (won't affect admin roles, etc.)

Users not in config remain untouched.

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

* Fix descriptions to match existing resources

* Cache Pulumi plugins and fix GITHUB_TOKEN for pulumi install

* Remove accidentally committed state backup

* Use github.token for pulumi install

* Fix formatting

Fix deploy: add pulumi login before config set

Fix deploy: set PULUMI_CONFIG_PASSPHRASE_FILE for config commands

Import existing docs-maintainers team (remove after deploy)

Remove docs-maintainers import workaround

Add docs-maintainers cleanup to state cleanup

Add pulumi refresh before up to sync state with reality

Rename Discord roles to add (synced) suffix

Cleanup Makefile and add lead-maintainers GitHub team

.github/workflows/ci.yml

@@ -26,7 +26,17 @@ jobs:
         with:
           pulumi-version: '3.197.0'
 
+      - name: Cache Pulumi plugins
+        uses: actions/cache@v4
+        with:
+          path: ~/.pulumi/plugins
+          key: pulumi-plugins-${{ hashFiles('Pulumi.yaml') }}
+          restore-keys: |
+            pulumi-plugins-
+
       - name: Install Pulumi packages
+        env:
+          GITHUB_TOKEN: ${{ github.token }}
         run: pulumi install
 
       - name: Install dependencies

.github/workflows/deploy.yml

@@ -34,7 +34,17 @@ jobs:
         with:
           pulumi-version: ${{ env.PULUMI_VERSION }}
 
+      - name: Cache Pulumi plugins
+        uses: actions/cache@v4
+        with:
+          path: ~/.pulumi/plugins
+          key: pulumi-plugins-${{ hashFiles('Pulumi.yaml') }}
+          restore-keys: |
+            pulumi-plugins-
+
       - name: Install Pulumi packages
+        env:
+          GITHUB_TOKEN: ${{ github.token }}
         run: pulumi install
 
       - name: Install dependencies
@@ -52,6 +62,12 @@ jobs:
         env:
           PULUMI_PASSPHRASE: ${{ secrets.PULUMI_PROD_PASSPHRASE }}
           GITHUB_TOKEN: ${{ secrets.PULUMI_GITHUB_TOKEN }}
+          DISCORD_BOT_TOKEN: ${{ secrets.DISCORD_BOT_TOKEN }}
+          DISCORD_GUILD_ID: ${{ secrets.DISCORD_GUILD_ID }}
         run: |
           echo "$PULUMI_PASSPHRASE" > passphrase.prod.txt
+          export PULUMI_CONFIG_PASSPHRASE_FILE=passphrase.prod.txt
+          pulumi login gs://mcp-access-prod-pulumi-state
+          pulumi config set discord:guildId "$DISCORD_GUILD_ID" --stack prod
+          pulumi config set discord:botToken "$DISCORD_BOT_TOKEN" --secret --stack prod
           make up

.github/workflows/preview.yml

@@ -0,0 +1,153 @@
+name: Preview
+
+on:
+  pull_request:
+    branches:
+      - main
+
+permissions:
+  contents: read
+  pull-requests: write
+
+env:
+  PULUMI_VERSION: "3.197.0"
+
+jobs:
+  preview:
+    name: Preview Changes
+    runs-on: ubuntu-latest
+    environment: production
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '22'
+          cache: 'npm'
+
+      - name: Setup Pulumi
+        uses: pulumi/actions@v6
+        with:
+          pulumi-version: ${{ env.PULUMI_VERSION }}
+
+      - name: Cache Pulumi plugins
+        uses: actions/cache@v4
+        with:
+          path: ~/.pulumi/plugins
+          key: pulumi-plugins-${{ hashFiles('Pulumi.yaml') }}
+          restore-keys: |
+            pulumi-plugins-
+
+      - name: Install Pulumi packages
+        env:
+          GITHUB_TOKEN: ${{ github.token }}
+        run: pulumi install
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Run validation
+        run: npm run check
+
+      - name: Authenticate to Google Cloud
+        uses: google-github-actions/auth@v2
+        with:
+          credentials_json: ${{ secrets.GCP_PROD_SERVICE_ACCOUNT_KEY }}
+
+      - name: Preview changes
+        id: preview
+        env:
+          PULUMI_PASSPHRASE: ${{ secrets.PULUMI_PROD_PASSPHRASE }}
+          GITHUB_TOKEN: ${{ secrets.PULUMI_GITHUB_TOKEN }}
+          DISCORD_BOT_TOKEN: ${{ secrets.DISCORD_BOT_TOKEN }}
+          DISCORD_GUILD_ID: ${{ secrets.DISCORD_GUILD_ID }}
+        run: |
+          echo "$PULUMI_PASSPHRASE" > passphrase.prod.txt
+          pulumi login gs://mcp-access-prod-pulumi-state
+
+          # Build config flags for Discord if secrets are available
+          CONFIG_FLAGS=""
+          if [ -n "$DISCORD_GUILD_ID" ]; then
+            CONFIG_FLAGS="$CONFIG_FLAGS --config discord:guildId=$DISCORD_GUILD_ID"
+          fi
+          if [ -n "$DISCORD_BOT_TOKEN" ]; then
+            CONFIG_FLAGS="$CONFIG_FLAGS --config discord:botToken=$DISCORD_BOT_TOKEN"
+          fi
+
+          # Run preview and capture output
+          set +e
+          PREVIEW_OUTPUT=$(PULUMI_CONFIG_PASSPHRASE_FILE=passphrase.prod.txt pulumi preview --stack prod --diff $CONFIG_FLAGS 2>&1)
+          PREVIEW_EXIT_CODE=$?
+          set -e
+
+          # Save output for comment
+          echo "exit_code=$PREVIEW_EXIT_CODE" >> $GITHUB_OUTPUT
+
+          # Write preview to file (handles multiline)
+          echo "$PREVIEW_OUTPUT" > preview_output.txt
+
+          # Also print to logs
+          echo "$PREVIEW_OUTPUT"
+
+          # Exit with preview exit code
+          exit $PREVIEW_EXIT_CODE
+
+      - name: Comment on PR
+        if: always()
+        uses: actions/github-script@v7
+        with:
+          script: |
+            const fs = require('fs');
+            let output = '';
+            try {
+              output = fs.readFileSync('preview_output.txt', 'utf8');
+            } catch (e) {
+              output = 'Failed to read preview output';
+            }
+
+            // Truncate if too long for GitHub comment
+            const maxLength = 60000;
+            if (output.length > maxLength) {
+              output = output.substring(0, maxLength) + '\n\n... (truncated)';
+            }
+
+            const body = `## Pulumi Preview
+
+            <details>
+            <summary>Click to expand preview output</summary>
+
+            \`\`\`
+            ${output}
+            \`\`\`
+
+            </details>
+            `;
+
+            // Find existing comment
+            const { data: comments } = await github.rest.issues.listComments({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              issue_number: context.issue.number,
+            });
+
+            const botComment = comments.find(c =>
+              c.user.type === 'Bot' && c.body.includes('## Pulumi Preview')
+            );
+
+            if (botComment) {
+              await github.rest.issues.updateComment({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                comment_id: botComment.id,
+                body: body
+              });
+            } else {
+              await github.rest.issues.createComment({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                issue_number: context.issue.number,
+                body: body
+              });
+            }