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

skills/create-plan/pi/.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/pi",
+  "files": [
+    {
+      "path": "SKILL.md",
+      "kind": "file",
+      "mode": "644",
+      "sha256": "8767db25ce6f03e141ce4c48f37e9d7c4958c3cf3d70729f3bd7214b84f6d065"
+    },
+    {
+      "path": "templates/continuation-runbook.md",
+      "kind": "file",
+      "mode": "644",
+      "sha256": "1685cded3d4abaf03122a490175ff03b7da593ce60cbca97ae15fadcb706617f"
+    },
+    {
+      "path": "templates/milestone-plan.md",
+      "kind": "file",
+      "mode": "644",
+      "sha256": "364c08bf0a5ee3738195a0770db72c5a4c9ad7f7fb89eaa064eb8c67f47ad69a"
+    },
+    {
+      "path": "templates/story-tracker.md",
+      "kind": "file",
+      "mode": "644",
+      "sha256": "ecb550ea9dcd9dde6c813e90af9f538bf5a247fc249e8e323f2b7bf583e52196"
+    }
+  ]
+}

skills/create-plan/pi/SKILL.md

@@ -3,6 +3,8 @@ name: create-plan
 description: Use when a user asks to create or maintain a structured implementation plan in pi, including milestones, bite-sized stories, and resumable local planning artifacts under ai_plan.
 ---
 
+<!-- ⚠️ GENERATED FILE – do not edit directly. Edit the canonical source in skills/create-plan/_source/pi/ and run `pnpm run sync:pi`. -->
+
 # Create Plan (Pi)
 
 Create and maintain a local plan workspace under `ai_plan/` at project root.

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

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

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

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

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

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