docs:prerequisite the need for a separate database for Plane AI and clarify environment variable setup

[akshat5302]

Description

This pull request updates the Plane AI self-hosting documentation to clarify database requirements.

Type of Change

• Documentation update

Summary by CodeRabbit

• Documentation
  • Clarified Plane AI setup to require a separate, dedicated database for AI data (e.g., chat history) to ensure isolation.
  • Added explicit guidance at prerequisites and enablement steps describing how to configure the database and set the related environment variable, with references to environment configuration guidance.
  • Repeated key guidance at critical setup points for visibility.

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Project	Deployment	Actions	Updated (UTC)
developer-docs	Ready	Preview, Comment	Mar 16, 2026 8:30am

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 43c4cc89-d8b2-4665-8b39-3ca3d3c204fd

📥 Commits

Reviewing files that changed from the base of the PR and between 8e354bd and 17ccf8c.

📒 Files selected for processing (1)

• docs/self-hosting/govern/plane-ai.md

🚧 Files skipped from review as they are similar to previous changes (1)

• docs/self-hosting/govern/plane-ai.md

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📝 Walkthrough

Walkthrough

Adds explicit information blocks stating Plane AI must use a separate, dedicated database in two locations (prerequisites and Enable Plane AI services). Blocks describe isolation of AI data (e.g., chat history), instruct setting PLANE_PI_DATABASE_URL, and reference the environment variables guide. No logic changes.

Changes

Cohort / File(s)	Summary
Documentation Update docs/self-hosting/govern/plane-ai.md	Added information blocks in prerequisites and Enable Plane AI services sections indicating Plane AI requires a separate dedicated database; details on isolating AI data, setting PLANE_PI_DATABASE_URL, and linking the environment variables guide.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Poem

🐰 In tunnels of docs where the guidance does play,
I nudge a small note — keep AI data away.
A separate safe hutch, set PLANE_PI_DATABASE_URL right,
So chat logs and memories sleep tidy at night. ✨

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately summarizes the main change: adding prerequisite documentation about the separate database requirement for Plane AI and clarifying environment variable setup.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch add-db-prerequisite-in-ai-doc

📝 Coding Plan

• Generate coding plan for human review comments

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