Document plans index in CLAUDE.md and plans/README.md

- Add plans/ to directory structure
- Add plans/index.json to shared state files table
- Add Plans row to component formats table
- Create plans/README.md with schema and query examples

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

CLAUDE.md

@@ -45,6 +45,8 @@ See `agents/README.md` for details on agent files and execution.
 ├── commands/                    # Slash command definitions
 ├── workflows/                   # Workflow definitions (design docs)
 │   └── README.md
+├── plans/                       # Implementation plans
+│   └── index.json               # Plan status registry
 ├── state/                       # Shared state files (JSON)
 │   ├── sysadmin/
 │   ├── programmer/
@@ -67,6 +69,7 @@ All agents MUST read and follow the processes defined in these files:
 | `state/personal-assistant-preferences.json` | PA persistent config | personal-assistant |
 | `state/personal-assistant/general-instructions.json` | User memory | personal-assistant |
 | `state/kb.json` | Shared knowledge base | personal-assistant |
+| `plans/index.json` | Plan status registry | any agent |
 
 ## Key Processes
 
@@ -126,6 +129,7 @@ curl -s -X PATCH \
 | **Skills** | SKILL.md + scripts/ + references/ | `skills/` |
 | **Commands** | Markdown + YAML frontmatter | `commands/` |
 | **Workflows** | YAML (design docs, not auto-executed) | `workflows/` |
+| **Plans** | Markdown + index.json | `plans/` |
 | **State** | JSON | `state/` |
 | **Hooks** | JSON | `hooks/` |