feat: Add /pa personal assistant command and state infrastructure

Implement canonical /pa entrypoint for user requests with:
- Context-aware request routing via master-orchestrator
- Session and persistent context level overrides
- Memory system with UUID-based general-instructions.json
- State files for session context and preferences

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

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

commands/pa.md

@@ -0,0 +1,111 @@
+---
+name: pa
+description: Personal assistant entrypoint for routing and context-aware requests
+aliases: [assistant, ask]
+invokes: agent:personal-assistant
+---
+
+# /pa Command
+
+Personal assistant entrypoint for routing requests and managing context.
+
+## Usage
+
+```
+/pa <request>              # Natural language request
+/pa -- <request>           # -- ends flag parsing, rest is literal
+```
+
+## Flags
+
+### Context Override (Request-Level)
+
+Override context gathering for a single request:
+
+```
+/pa --context none -- <request>
+/pa --context minimal -- <request>
+/pa --context moderate -- <request>
+/pa --context comprehensive -- <request>
+```
+
+### Session Override (Ephemeral)
+
+Set context level for the current session:
+
+```
+/pa --set-context none|minimal|moderate|comprehensive
+/pa --clear-context
+```
+
+### Persistent Default (Requires Confirmation)
+
+Set default context level permanently:
+
+```
+/pa --set-default-context none|minimal|moderate|comprehensive
+```
+
+### Memory Management
+
+PA writes directly to general-instructions.json:
+
+```
+/pa --remember -- "<instruction>"
+/pa --list-mem              # Show active memory items
+/pa --list-mem --all        # Include deprecated items
+/pa --forget <uuid>         # Mark item as deprecated
+```
+
+### Introspection
+
+```
+/pa --show-config           # Show current configuration
+/pa --help                  # Show this help
+```
+
+## Context Levels
+
+Context precedence (highest to lowest):
+1. Request override: `--context <level>`
+2. Session override: `session-context.json`
+3. Persistent default: `personal-assistant-preferences.json`
+4. Hard default: `moderate`
+
+Level definitions (PA interprets flexibly per request type):
+- `none` - Skip context gathering
+- `minimal` - Light context
+- `moderate` - Balanced (default)
+- `comprehensive` - Deep context scan
+
+## Routing Behavior
+
+PA routes requests through master-orchestrator:
+
+```
+User -> /pa <request>
+         |
+    Personal Assistant (classify, gather context)
+         |
+    Master Orchestrator (coordinate, enforce)
+         |
+    Domain Agent (execute)
+         |
+    Results bubble up
+```
+
+## Coexistence with Direct Commands
+
+Both patterns are valid:
+- `/pa deploy my-app` - PA classifies and routes
+- `/deploy my-app` - Directly invokes deploy workflow
+
+Direct commands are power-user shortcuts; `/pa` is the conversational interface.
+
+## State Files
+
+| File | Purpose |
+|------|---------|
+| `state/personal-assistant/session-context.json` | Session context override |
+| `state/personal-assistant/general-instructions.json` | User memory |
+| `state/personal-assistant-preferences.json` | Persistent preferences |