refactor(vault): Phase 5 — single agent contract

- Rewrite AGENTS.md as single operations manual (PARA, permission table,
  frontmatter conventions, safety rules, code style)
- Root CLAUDE.md = one-line pointer to AGENTS.md
- Delete 13 stub CLAUDE.md files across vault directories
- Delete .claude/project-instructions.md + .claude/memory/instructions/
  (content merged into AGENTS.md)
- .claude/settings.json: deny plugin data.json + 04_Archive + git push;
  ask on .obsidian/** edits; remove SessionStart hook (claudesidian welcome)
- Delete 3 upstream commands (init-bootstrap, install-claudesidian, upgrade)
- Add risk/writes metadata to 14 remaining commands
- Rewrite README.md (remove all claudesidian content)
- package.json: name → my-vault, remove check-updates/firecrawl scripts

package.json

@@ -1,7 +1,7 @@
 {
-  "name": "claudesidian",
-  "version": "0.14.2",
-  "description": "Claude Code + Obsidian Starter Kit - AI-powered second brain",
+  "name": "my-vault",
+  "version": "1.0.0",
+  "description": "Personal Obsidian vault with PARA methodology",
   "type": "module",
   "scripts": {
     "setup": "pnpm install && echo '✅ Setup complete! Configure GEMINI_API_KEY for vision features'",
@@ -22,10 +22,6 @@
     "attachments:update-links": "node .scripts/update-attachment-links.js",
     "transcript:extract": ".scripts/transcript-extract.sh",
     "vault:stats": ".scripts/vault-stats.sh",
-    "check-updates": "REMOTE=$(curl -s https://raw.githubusercontent.com/heyitsnoah/claudesidian/main/package.json | grep version | head -1 | sed 's/.*: \"\\(.*\\)\".*/\\1/') && LOCAL=$(grep version package.json | head -1 | sed 's/.*: \"\\(.*\\)\".*/\\1/') && if [ \"$LOCAL\" != \"$REMOTE\" ]; then echo -e \"📦 Update available! Latest: $REMOTE (you have: $LOCAL)\\n\\n⬇\\n/upgrade\\n⬆\\n\\n## What will this do\\n\\n✅ Update to the latest version of Claudesidian\\n✅ Get new features and improvements\\n✅ Preserve your vault content and settings\\n\\n\"; fi",
-    "firecrawl:scrape": ".scripts/firecrawl-scrape.sh",
-    "firecrawl:batch": ".scripts/firecrawl-batch.sh",
-    "firecrawl:setup": "source .scripts/setup-firecrawl-env.sh",
     "daily-note": "node .scripts/daily-note.js"
   },
   "keywords": [