Upkeep upgrade (#3283)

* add upgrade callout to automation docs

* llms

* Update changelog.json

Author: gfletcher-cll

public/changelog.json

@@ -373,6 +373,13 @@
       "title": "CCIP Expands to Tempo Testnet",
       "topic": "CCIP"
     },
+    {
+      "category": "release",
+      "date": "2025-12-11",
+      "description": "Upgraded Time-based Upkeeps. Read more [here](https://docs.chain.link/chainlink-automation/guides/job-scheduler)",
+      "title": "Upgraded Time-based Upkeeps ",
+      "topic": "Automation"
+    },
     {
       "category": "integration",
       "date": "2025-12-09",

reports/llms-report.json

@@ -1,5 +1,5 @@
 {
-  "startedAt": "2025-12-12T18:52:31.071Z",
+  "startedAt": "2025-12-12T21:54:23.121Z",
   "siteBase": "https://docs.chain.link",
   "sections": [
     {
@@ -31,8 +31,8 @@
       "pagesProcessed": 260,
       "outputPath": "src/content/ccip/llms-full.txt",
       "bytes": 2848574,
-      "prevBytes": 2849877,
-      "deltaBytes": -1303
+      "prevBytes": 2848574,
+      "deltaBytes": 0
     },
     {
       "section": "data-feeds",
@@ -78,9 +78,9 @@
       "section": "chainlink-automation",
       "pagesProcessed": 25,
       "outputPath": "src/content/chainlink-automation/llms-full.txt",
-      "bytes": 196013,
+      "bytes": 197667,
       "prevBytes": 196013,
-      "deltaBytes": 0
+      "deltaBytes": 1654
     },
     {
       "section": "resources",
@@ -123,5 +123,5 @@
       "deltaBytes": 0
     }
   ],
-  "finishedAt": "2025-12-12T18:52:34.836Z"
+  "finishedAt": "2025-12-12T21:54:26.892Z"
 }

src/content/chainlink-automation/guides/job-scheduler.mdx

@@ -22,6 +22,16 @@ Create powerful automation for your smart contract using time schedules without
   Follow the [best practices](/chainlink-automation/concepts/best-practice) when creating an Automation-compatible
   contract and test your upkeep on a testnet before deploying it to a mainnet.
 </Aside>
+
+<Aside type="caution" title="Upgrade Time-Based Upkeep Recommended">
+  The Automation “Time-based” upkeep contract has been updated so that only the unique forwarder for your upkeep can call it. If your upkeep was deployed before 11 December 2025, we recommend you replace your existing “Time-based” upkeeps using the new “Time-based” upkeep.
+
+To upgrade, simply follow the [Automation UI](https://automation.chain.link/) to register a new “Time-based” upkeep with the same details as your previous upkeep. Once registered, you can delete the previous upkeep.
+
+Upgrading to the latest “Time-based” upkeep removes i) the ability of 3rd parties to trigger your upkeep, and ii) the possibility that a call with insufficient gas ticks the Timer forward but fails to execute your desired function.
+
+</Aside>
+
 ## Using the Chainlink Automation app
 
 In the [Chainlink Automation App](https://automation.chain.link/), click the blue **Register new Upkeep** button.

src/content/chainlink-automation/index.mdx

@@ -23,6 +23,15 @@ import ChainlinkAutomation from "@features/chainlink-automation/common/Chainlink
 
 <ChainlinkAutomation callout="deprecation" />
 
+<Aside type="caution" title="Upgrade Time-Based Upkeep Recommended">
+  The Automation “Time-based” upkeep contract has been updated so that only the unique forwarder for your upkeep can call it. If your upkeep was deployed before 11 December 2025, we recommend you replace your existing “Time-based” upkeeps using the new “Time-based” upkeep.
+
+To upgrade, simply follow the [Automation UI](https://automation.chain.link/) to register a new “Time-based” upkeep with the same details as your previous upkeep. Once registered, you can delete the previous upkeep.
+
+Upgrading to the latest “Time-based” upkeep removes i) the ability of 3rd parties to trigger your upkeep, and ii) the possibility that a call with insufficient gas ticks the Timer forward but fails to execute your desired function.
+
+</Aside>
+
 Automate your smart contracts using a secure and hyper-reliable decentralized network that uses the same external network of node operators that secures billions in value. Building on Chainlink Automation will accelerate your innovation, save you time and money, and help you get to market faster so you don't have to deal with the setup cost, ongoing maintenance, and risks associated with a centralized automation stack.
 
 To learn more about how the Chainlink Automation Network automates your smart contracts, visit the [Concepts](/chainlink-automation/concepts/automation-concepts) and [Architecture](/chainlink-automation/concepts/automation-architecture) pages. You can also learn more through our [additional Automation resources](https://chain.link/automation#masterclass).

src/content/chainlink-automation/llms-full.txt

@@ -401,6 +401,14 @@ Create powerful automation for your smart contract using time schedules without
   contract and test your upkeep on a testnet before deploying it to a mainnet.
 </Aside>
 
+<Aside type="caution" title="Upgrade Time-Based Upkeep Recommended">
+  The Automation “Time-based” upkeep contract has been updated so that only the unique forwarder for your upkeep can call it. If your upkeep was deployed before 11 December 2025, we recommend you replace your existing “Time-based” upkeeps using the new “Time-based” upkeep.
+
+  To upgrade, simply follow the [Automation UI](https://automation.chain.link/) to register a new “Time-based” upkeep with the same details as your previous upkeep. Once registered, you can delete the previous upkeep.
+
+  Upgrading to the latest “Time-based” upkeep removes i) the ability of 3rd parties to trigger your upkeep, and ii) the possibility that a call with insufficient gas ticks the Timer forward but fails to execute your desired function.
+</Aside>
+
 ## Using the Chainlink Automation app
 
 In the [Chainlink Automation App](https://automation.chain.link/), click the blue **Register new Upkeep** button.
@@ -976,6 +984,14 @@ Source: https://docs.chain.link/chainlink-automation
   Try Chainlink Automation in the [Getting Started](/chainlink-automation/overview/getting-started) guide.
 </Aside>
 
+<Aside type="caution" title="Upgrade Time-Based Upkeep Recommended">
+  The Automation “Time-based” upkeep contract has been updated so that only the unique forwarder for your upkeep can call it. If your upkeep was deployed before 11 December 2025, we recommend you replace your existing “Time-based” upkeeps using the new “Time-based” upkeep.
+
+  To upgrade, simply follow the [Automation UI](https://automation.chain.link/) to register a new “Time-based” upkeep with the same details as your previous upkeep. Once registered, you can delete the previous upkeep.
+
+  Upgrading to the latest “Time-based” upkeep removes i) the ability of 3rd parties to trigger your upkeep, and ii) the possibility that a call with insufficient gas ticks the Timer forward but fails to execute your desired function.
+</Aside>
+
 Automate your smart contracts using a secure and hyper-reliable decentralized network that uses the same external network of node operators that secures billions in value. Building on Chainlink Automation will accelerate your innovation, save you time and money, and help you get to market faster so you don't have to deal with the setup cost, ongoing maintenance, and risks associated with a centralized automation stack.
 
 To learn more about how the Chainlink Automation Network automates your smart contracts, visit the [Concepts](/chainlink-automation/concepts/automation-concepts) and [Architecture](/chainlink-automation/concepts/automation-architecture) pages. You can also learn more through our [additional Automation resources](https://chain.link/automation#masterclass).