AI agent that updates its own rules to modify behavior
Needs changesNeeds changes. This template uses 1 thing(s) that n8n 3.0 removes: AI Agent v1 (old agent modes). 1 breaking item(s) found. Static check, last run 2026-10-19.
What this workflow does
This AI workflow has 13 nodes and runs when a chat message arrives. Along the way it connects Anthropic Chat Model, Postgres and Google Sheets.
How it runs
Trigger: When a chat message arrives.
- Merge: merges the data from its input branches
- Get rules from database (Postgres): run a query
- Ultimate Assistant (AI Agent): runs an AI agent, with model: Anthropic Chat Model; 2 tools (Insert rule into database, Execute query on rule database); memory: Chat History
- Aggregate: combines items into one
- Get rules from sheets (Google Sheets): uses Google Sheets
- Add rule to sheet (Google Sheets Tool): append
- Update rule in sheet (Google Sheets Tool): update
- Delete rule in sheet (Google Sheets Tool): delete
Services it uses
Before you upgrade to n8n 3.0
1 thing in this workflow is removed in n8n 3.0. Fix it before you upgrade:
- AI Agent v1 (old agent modes) in Ultimate Assistant1 (v1.7): replace with Latest AI Agent node (Tools Agent). For SQL Agent, use a Postgres or MySQL tool with a recent AI Agent.
Rather not rewrite it? Many of these flows can be rebuilt in Make (free plan).
| Removed in 3.0 | Replace with |
|---|---|
| AI Agent v1 (old agent modes) Ultimate Assistant1 (v1.7) | Latest AI Agent node (Tools Agent). For SQL Agent, use a Postgres or MySQL tool with a recent AI Agent. |
Nodes used (10)
- AI Agent
@n8n/n8n-nodes-langchain.agent - Simple Memory
@n8n/n8n-nodes-langchain.memoryBufferWindow - Anthropic Chat Model
@n8n/n8n-nodes-langchain.lmChatAnthropic - Postgres
n8n-nodes-base.postgres - Merge
n8n-nodes-base.merge - Aggregate
n8n-nodes-base.aggregate - Postgres Tool
n8n-nodes-base.postgresTool - Chat Trigger
@n8n/n8n-nodes-langchain.chatTrigger - Google Sheets
n8n-nodes-base.googleSheets - Google Sheets Tool
n8n-nodes-base.googleSheetsTool
From the author
Video walkthrough https://www.youtube.com/watch?v=OwIFK-r-NtQ Summary of agent This agent can write and rewrite its own rules, allowing you to mold its behavior. It receives rules from a database as system instructions and has tools to create, edit, or delete…