chore(marketplace): register composer and symphony plugins

Both plugins now have .claude-plugin/plugin.json manifests and are
listed in the root marketplace.json so they can be installed via the
plugin marketplace UI alongside council-of-experts and genealogy.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.claude-plugin/marketplace.json

@@ -14,6 +14,16 @@
       "name": "genealogy",
       "source": "./genealogy",
       "description": "Genealogy research methodology — GPS evidence evaluation, FAN workflows, research journal, claim promotion, and transcription."
+    },
+    {
+      "name": "composer",
+      "source": "./composer",
+      "description": "Discovery-phase companion that walks a project from \"I want an app that…\" to a tree of stories in the issue tracker. Pairs with symphony."
+    },
+    {
+      "name": "symphony",
+      "source": "./symphony",
+      "description": "Tracker-agnostic orchestrator daemon — polls the issue tracker, dispatches isolated worker agents per issue, reconciles state. Pairs with composer."
     }
   ]
 }

composer/.claude-plugin/plugin.json

@@ -0,0 +1,9 @@
+{
+  "name": "composer",
+  "version": "0.1.0",
+  "description": "Discovery-phase companion. Walks a user from \"I want an app that…\" through concept, users, requirements, design system, interaction design, flows, mocks, architecture, and stories — landing in the project's issue tracker. Design system and interaction design produced as auto-loading project skills. Pairs with symphony.",
+  "author": {
+    "name": "Adam Knight"
+  },
+  "keywords": ["discovery", "planning", "product", "design-system", "interaction-design", "mocks", "stories", "tracker"]
+}

symphony/.claude-plugin/plugin.json

@@ -0,0 +1,9 @@
+{
+  "name": "symphony",
+  "version": "0.1.0",
+  "description": "Tracker-agnostic orchestrator daemon. Polls the project's issue tracker on a cadence, dispatches isolated worker agents per issue, and reconciles state across ticks. Pairs with composer (composer's stories become symphony's input).",
+  "author": {
+    "name": "Adam Knight"
+  },
+  "keywords": ["orchestrator", "automation", "issue-tracker", "github", "gitea", "linear", "daemon", "workers"]
+}