feat(M3): Shared-source generator for agent variants

skills/create-plan/cursor/.generated-manifest.json

@@ -0,0 +1,31 @@
+{
+  "$schema": "https://ai-coding-skills.dev/schemas/generated-manifest/v1.json",
+  "generator": "scripts/generate-skills.mjs",
+  "generatedRoot": "skills/create-plan/cursor",
+  "files": [
+    {
+      "path": "SKILL.md",
+      "kind": "file",
+      "mode": "644",
+      "sha256": "f1478478780244adbca57e1723c2055961ff5f1949a185e23d23d406ce4c76ce"
+    },
+    {
+      "path": "templates/continuation-runbook.md",
+      "kind": "file",
+      "mode": "644",
+      "sha256": "372189876f2d55edcbae8c106c1b0992a48a7061f9033ea5d3f2d329d57baecb"
+    },
+    {
+      "path": "templates/milestone-plan.md",
+      "kind": "file",
+      "mode": "644",
+      "sha256": "01c7a810c73d9890d29255788815411c6b1605b236e1cf336652f15e444841de"
+    },
+    {
+      "path": "templates/story-tracker.md",
+      "kind": "file",
+      "mode": "644",
+      "sha256": "969525389a148d5eb3e8a8e5c85647e9273e8309a96a37af194adcb5f89a5630"
+    }
+  ]
+}

skills/create-plan/cursor/SKILL.md

@@ -3,6 +3,8 @@ name: create-plan
 description: Use when starting a new feature, project, or complex task that needs structured planning with milestones, bite-sized stories, and resumable execution context in Cursor Agent CLI workflows. ALWAYS invoke when user says "create a plan", "make a plan", "plan this", "start planning", or similar planning requests.
 ---
 
+<!-- ⚠️ GENERATED FILE – do not edit directly. Edit the canonical source in skills/create-plan/_source/cursor/ and run `pnpm run sync:pi`. -->
+
 # Create Plan (Cursor Agent CLI)
 
 Create and maintain a local plan folder under `ai_plan/` at project root.

skills/create-plan/cursor/templates/continuation-runbook.md

@@ -1,3 +1,4 @@
+<!-- ⚠️ GENERATED FILE – do not edit directly. Edit the canonical source in skills/create-plan/_source/cursor/ and run `pnpm run sync:pi`. -->
 # Continuation Runbook: [Plan Title]
 
 ## Reference Files (START HERE)

skills/create-plan/cursor/templates/milestone-plan.md

@@ -1,3 +1,4 @@
+<!-- ⚠️ GENERATED FILE – do not edit directly. Edit the canonical source in skills/create-plan/_source/cursor/ and run `pnpm run sync:pi`. -->
 # [Plan Title]
 
 ## Overview

skills/create-plan/cursor/templates/story-tracker.md

@@ -1,3 +1,4 @@
+<!-- ⚠️ GENERATED FILE – do not edit directly. Edit the canonical source in skills/create-plan/_source/cursor/ and run `pnpm run sync:pi`. -->
 # Story Tracker: [Plan Title]
 
 ## Progress Summary