Flesh out knowledgebase docs a bit

docs/about/features.md

@@ -83,7 +83,7 @@ changes.
 
 ![Irony in Committable Suggestions - CodeRabbit](/img/about/ironic-committable.png)
 
-### 7. Learnings {#learnings}
+### 7. [Learnings](/integrations/knowledge-base#learnings) {#learnings}
 
 - **CodeRabbit** learns from user chat interactions to gain tribal knowledge on your
   repositories and organization.

docs/integrations/knowledge-base.md

@@ -1,36 +1,54 @@
 ---
-title: External Knowledge Base
-description: Integrate CodeRabbit with an external knowledge base for issue tracking.
+title: Knowledge Base
+description: Learn about CodeRabbit's internal knowledge base and its integrations with external services.
 sidebar_label: Knowledge Base
 sidebar_position: 4
 ---
 
-CodeRabbit integrates with external knowledge bases to provide a seamless experience for issue tracking. This will allow CodeRabbit to use the context from the linked issues while reviewing the code.
+CodeRabbit utilizes an internal knowledge base that integrates with several external services to provide a seamless review and issue management experience.
 
-## Jira {#jira}
+## Issues
 
-### CodeRabbit App
+The issues knowledge base allows CodeRabbit to use the context from linked and related issues while reviewing the code.
+
+### Jira {#jira}
+
+#### CodeRabbit App
 
 1. Navigate to [integrations][integrations] in the CodeRabbit app.
 2. Toggle the Jira switch to enable the integration.
 
 Upon enabling the Jira integration, CodeRabbit will redirect you to the Jira login page. Enter your Jira credentials to authenticate the integration.
 
-### CodeRabbit Configuration
+#### CodeRabbit Configuration
 
 1. Add Jira's Project Keys to the `knowledge_base.jira.project_keys` field in your project's CodeRabbit configuration file at `.coderabbit.yaml`.
 
-## Linear {#Linear}
+### Linear {#Linear}
 
-### CodeRabbit App
+#### CodeRabbit App
 
 1. Navigate to [integrations][integrations] in the CodeRabbit app.
 2. Toggle the Linear switch to enable the integration.
 
 Upon enabling the Linear integration, CodeRabbit will redirect you to the Linear login page. Enter your Linear credentials to authenticate the integration.
 
-### CodeRabbit Configuration
+#### CodeRabbit Configuration
 
 1. Add Linear's Team Keys to the `knowledge_base.linear.team_keys` field in your project's CodeRabbit configuration file at `.coderabbit.yaml`.
 
 [integrations]: https://app.coderabbit.ai/integrations
+
+## Learnings {#learnings}
+
+You can tell the bot to remember things about either specific lines in files, or generally about the entire repository, or even across repositories.
+
+For example you can add a comment in a PR to chat directly with CodeRabbit. `@coderabbitai always remember to enforce camelCase`.
+
+Or you can comment directly on some lines of code in the PR. `@coderabbitai do not complain about lack of error handling here, it is handled higher up the execution stack.`
+
+## On-premises
+
+For self-hosted / on-premises deployments, you can enable the knowledge base features by setting `ON_PREM_KNOWLEDGE_BASE=true` in the environment variables for your self-hosted docker image.
+
+By default, CodeRabbit will store its data in the `coderabbitai/data` branch unless you set `ON_PREM_KNOWLEDGE_BASE_BRANCH=<branch_name>` with a different value.