feat: add custom agents and quick-flow workflows, remove tech-spec track

Major Changes:
- Add sample custom agents demonstrating installable agent system
  - commit-poet: Generates semantic commit messages (BMAD Method repo sample)
  - toolsmith: Development tooling expert with knowledge base covering bundlers, deployment, docs, installers, modules, and tests (BMAD Method repo sample)
  - Both agents demonstrate custom agent architecture and are installable to projects via BMAD installer system
  - Include comprehensive installation guides and sidecar knowledge bases

- Add bmad-quick-flow methodology for rapid development
  - create-tech-spec: Direct technical specification workflow
  - quick-dev: Flexible execution workflow supporting both tech-spec-driven and direct instruction development
  - quick-flow-solo-dev (Barry): 1 man show agent specialized in bmad-quick-flow methodology
  - Comprehensive documentation for quick-flow approach and solo development

- Remove deprecated tech-spec workflow track
  - Delete entire tech-spec workflow directory and templates
  - Remove quick-spec-flow.md documentation (replaced by quick-flow docs)
  - Clean up unused epic and story templates

- Fix custom agent installation across IDE installers
  - Repair antigravity and multiple IDE installers to properly support custom agents
  - Enable custom agent installation via quick installer, agent installer, regular installer, and special agent installer
  - All installation methods now accessible via npx with full documentation

Infrastructure:
- Update BMM module configurations and team setups
- Modify workflow status paths to support quick-flow integration
- Reorganize documentation with new agent and workflow guides
- Add custom/ directory for user customizations
- Update platform codes and installer configurations

tools/cli/installers/lib/core/installer.js

@@ -1629,14 +1629,9 @@ class Installer {
         spinner.succeed('No custom agents found to rebuild');
       }
 
-      // Regenerate manifests after compilation (including custom agents)
-      spinner.start('Regenerating manifests...');
-      const installedModules = entries
-        .filter((e) => e.isDirectory() && e.name !== '_cfg' && e.name !== 'docs' && e.name !== 'agents' && e.name !== 'core')
-        .map((e) => e.name);
-      const manifestGen = new ManifestGenerator();
-
-      // Get existing IDE list from manifest
+      // Skip full manifest regeneration during compileAgents to preserve custom agents
+      // Custom agents are already added to manifests during individual installation
+      // Only regenerate YAML manifest for IDE updates if needed
       const existingManifestPath = path.join(bmadDir, '_cfg', 'manifest.yaml');
       let existingIdes = [];
       if (await fs.pathExists(existingManifestPath)) {
@@ -1646,11 +1641,6 @@ class Installer {
         existingIdes = manifest.ides || [];
       }
 
-      await manifestGen.generateManifests(bmadDir, installedModules, [], {
-        ides: existingIdes,
-      });
-      spinner.succeed('Manifests regenerated');
-
       // Update IDE configurations using the existing IDE list from manifest
       if (existingIdes && existingIdes.length > 0) {
         spinner.start('Updating IDE configurations...');
@@ -2369,8 +2359,16 @@ class Installer {
 
           // Update manifest CSV
           if (await fs.pathExists(manifestFile)) {
-            const manifestData = extractManifestData(xml, { ...metadata, name: finalAgentName }, relativePath, 'custom');
-            manifestData.name = finalAgentName;
+            // Preserve YAML metadata for persona name, but override id for filename
+            const manifestMetadata = {
+              ...metadata,
+              id: relativePath, // Use the compiled agent path for id
+              name: metadata.name || finalAgentName, // Use YAML metadata.name (persona name) or fallback
+              title: metadata.title, // Use YAML title
+              icon: metadata.icon, // Use YAML icon
+            };
+            const manifestData = extractManifestData(xml, manifestMetadata, relativePath, 'custom');
+            manifestData.name = finalAgentName; // Use filename for the name field
             manifestData.path = relativePath;
             addToManifest(manifestFile, manifestData);
           }