Improve OpenClaw post title, tags, and meta description

- Retitle to match search intent: "How to Add Persistent Memory to
  OpenClaw with Hindsight" targets openclaw memory/persistent memory queries
- Add intro paragraph before <!-- truncate --> so Docusaurus generates a
  proper meta description instead of "TL;DR"
- Expand tags from [openclaw] to include memory, agents, persistent-memory,
  knowledge-graph

hindsight-docs/blog/2026-03-06-adding-memory-to-openclaw-with-hindsight.md

@@ -1,16 +1,18 @@
 ---
-title: "The Memory Upgrade Every OpenClaw User Needs"
+title: "How to Add Persistent Memory to OpenClaw with Hindsight"
 authors: [benfrank241]
 date: 2026-03-06T12:00
-tags: [openclaw]
+tags: [openclaw, memory, agents, persistent-memory, knowledge-graph]
 image: /img/blog/adding-memory-to-openclaw-with-hindsight.png
 hide_table_of_contents: true
 ---
 
-## TL;DR
+OpenClaw's built-in memory depends on the agent deciding what to save — and models don't do this consistently. [Hindsight](https://github.com/vectorize-io/hindsight) replaces it with automated extraction and auto-recall: every conversation is captured, facts and entities are extracted in the background, and relevant context is injected before every response automatically. One plugin install, three commands, no Docker.
 
 <!-- truncate -->
 
+## TL;DR
+
 - OpenClaw's built-in memory is file-based -- markdown files on disk with SQLite vector search. It works, but the agent has to decide what to remember. Hindsight automates the entire pipeline.
 - Hindsight is open source and runs locally by default. Your conversations, extracted knowledge, and memory store never leave your machine unless you choose otherwise.
 - One plugin install, three commands to set up. The `hindsight-embed` daemon bundles the full memory engine (API + PostgreSQL) into a single process.