CLI: include agentId in aggregated sessions output

docs/cli/sessions.md

@@ -24,6 +24,27 @@ Scope selection:
 - `--all-agents`: aggregate all configured agent stores
 - `--store <path>`: explicit store path (cannot be combined with `--agent` or `--all-agents`)
 
+JSON examples:
+
+`openclaw sessions --all-agents --json`:
+
+```json
+{
+  "path": null,
+  "stores": [
+    { "agentId": "main", "path": "/home/user/.openclaw/agents/main/sessions/sessions.json" },
+    { "agentId": "work", "path": "/home/user/.openclaw/agents/work/sessions/sessions.json" }
+  ],
+  "allAgents": true,
+  "count": 2,
+  "activeMinutes": null,
+  "sessions": [
+    { "agentId": "main", "key": "agent:main:main", "model": "gpt-5" },
+    { "agentId": "work", "key": "agent:work:main", "model": "claude-opus-4-5" }
+  ]
+}
+```
+
 ## Cleanup maintenance
 
 Run maintenance now (instead of waiting for the next write cycle):
@@ -48,6 +69,34 @@ openclaw sessions cleanup --json
 - `--store <path>`: run against a specific `sessions.json` file.
 - `--json`: print a JSON summary. With `--all-agents`, output includes one summary per store.
 
+`openclaw sessions cleanup --all-agents --dry-run --json`:
+
+```json
+{
+  "allAgents": true,
+  "mode": "warn",
+  "dryRun": true,
+  "stores": [
+    {
+      "agentId": "main",
+      "storePath": "/home/user/.openclaw/agents/main/sessions/sessions.json",
+      "beforeCount": 120,
+      "afterCount": 80,
+      "pruned": 40,
+      "capped": 0
+    },
+    {
+      "agentId": "work",
+      "storePath": "/home/user/.openclaw/agents/work/sessions/sessions.json",
+      "beforeCount": 18,
+      "afterCount": 18,
+      "pruned": 0,
+      "capped": 0
+    }
+  ]
+}
+```
+
 Related:
 
 - Session config: [Configuration reference](/gateway/configuration-reference#session)