feat(mem0-agent): read path, hooks, maintenance, CLI and skills

- pack.py: single-call context pack, budgeted, sanitized, cached, with
  served-id tracking that turns a citation into POSITIVE feedback
- assist.py: error-signature lookup (never raw stdout, which returned 0 results in v1)
- maintain.py: transactional consolidation (add merged -> verify -> delete sources)
- transcript.py: JSONL parsing into non-overlapping windows via a cursor
- cli.py: the twelve commands the hooks invoke; detached assist queues a block
  that the next prompt hook drains, keeping the hot path network-free
- hooks generated from one spec; plugin manifest, MCP wiring, five skills

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

integrations/mem0-agent/hooks/generated/claude-code.hooks.json

@@ -0,0 +1,73 @@
+{
+  "hooks": {
+    "SessionStart": [
+      {
+        "matcher": "startup|resume|compact",
+        "hooks": [
+          {
+            "type": "command",
+            "command": "MEM0_EDITOR=claude-code mem0-agent context --session-id \"$CLAUDE_SESSION_ID\"",
+            "timeout": 10,
+            "statusMessage": "Loading mem0 context..."
+          }
+        ]
+      }
+    ],
+    "UserPromptSubmit": [
+      {
+        "hooks": [
+          {
+            "type": "command",
+            "command": "MEM0_EDITOR=claude-code MEM0_LOCAL_ONLY=1 mem0-agent observe --source prompt",
+            "timeout": 3
+          }
+        ]
+      }
+    ],
+    "PostToolUse": [
+      {
+        "matcher": "Bash",
+        "hooks": [
+          {
+            "type": "command",
+            "command": "(MEM0_EDITOR=claude-code mem0-agent assist-error >/dev/null 2>&1 &)",
+            "timeout": 5
+          }
+        ]
+      }
+    ],
+    "Stop": [
+      {
+        "hooks": [
+          {
+            "type": "command",
+            "command": "(MEM0_EDITOR=claude-code mem0-agent flush >/dev/null 2>&1 &)",
+            "timeout": 5
+          }
+        ]
+      }
+    ],
+    "PreCompact": [
+      {
+        "hooks": [
+          {
+            "type": "command",
+            "command": "(MEM0_EDITOR=claude-code mem0-agent flush --reason precompact >/dev/null 2>&1 &)",
+            "timeout": 5
+          }
+        ]
+      }
+    ],
+    "SessionEnd": [
+      {
+        "hooks": [
+          {
+            "type": "command",
+            "command": "(MEM0_EDITOR=claude-code mem0-agent flush --reason end >/dev/null 2>&1 &)",
+            "timeout": 5
+          }
+        ]
+      }
+    ]
+  }
+}