Enhance README with PR monitoring examples

Added examples for monitoring GitHub pull requests with Lobster.

README.md

@@ -7,6 +7,8 @@ This repo is an MVP scaffold focused on the core shell runtime and a first Gmail
 
 ## Example of lobster at work
 Clawdbot or any other AI agent can use `lobster` as a workflow engine and not construct a query every time - thus saving tokens, providing room for determinism, and resumability.
+
+### Watching a PR that hasn't had changes
 ```
 node bin/lobster.js "workflows.run --name github.pr.monitor --args-json '{\"repo\":\"clawdbot/clawdbot\",\"pr\":1152}'"
 [
@@ -41,6 +43,95 @@ node bin/lobster.js "workflows.run --name github.pr.monitor --args-json '{\"repo
   }
 ]
 ```
+### And a PR that has a state change (in this case an approved PR)
+
+```
+ node bin/lobster.js "workflows.run --name github.pr.monitor --args-json '{\"repo\":\"clawdbot/clawdbot\",\"pr\":1200}'"
+[
+  {
+    "kind": "github.pr.monitor",
+    "repo": "clawdbot/clawdbot",
+    "pr": 1200,
+    "key": "github.pr:clawdbot/clawdbot#1200",
+    "changed": true,
+    "summary": {
+      "changedFields": [
+        "number",
+        "title",
+        "url",
+        "state",
+        "isDraft",
+        "mergeable",
+        "reviewDecision",
+        "updatedAt",
+        "baseRefName",
+        "headRefName"
+      ],
+      "changes": {
+        "number": {
+          "from": null,
+          "to": 1200
+        },
+        "title": {
+          "from": null,
+          "to": "feat(tui): add syntax highlighting for code blocks"
+        },
+        "url": {
+          "from": null,
+          "to": "https://github.com/clawdbot/clawdbot/pull/1200"
+        },
+        "state": {
+          "from": null,
+          "to": "MERGED"
+        },
+        "isDraft": {
+          "from": null,
+          "to": false
+        },
+        "mergeable": {
+          "from": null,
+          "to": "UNKNOWN"
+        },
+        "reviewDecision": {
+          "from": null,
+          "to": ""
+        },
+        "updatedAt": {
+          "from": null,
+          "to": "2026-01-19T05:06:09Z"
+        },
+        "baseRefName": {
+          "from": null,
+          "to": "main"
+        },
+        "headRefName": {
+          "from": null,
+          "to": "feat/tui-syntax-highlighting"
+        }
+      }
+    },
+    "prSnapshot": {
+      "author": {
+        "id": "MDQ6VXNlcjE0MzY4NTM=",
+        "is_bot": false,
+        "login": "vignesh07",
+        "name": "Vignesh"
+      },
+      "baseRefName": "main",
+      "headRefName": "feat/tui-syntax-highlighting",
+      "isDraft": false,
+      "mergeable": "UNKNOWN",
+      "number": 1200,
+      "reviewDecision": "",
+      "state": "MERGED",
+      "title": "feat(tui): add syntax highlighting for code blocks",
+      "updatedAt": "2026-01-19T05:06:09Z",
+      "url": "https://github.com/clawdbot/clawdbot/pull/1200"
+    }
+  }
+]
+```
+
 ## Goals
 
 - Typed pipelines (objects/arrays), not text pipes.