Provide separate llms.txt for different product plans in en/zh/ja #666
Description
Why:
Currently, a single llms.txt file (en for https://docs.pingcap.com/llms.txt; zh for https://docs.pingcap.com/zh/llms.txt) contains links to all TiDB documentation across Self-Managed, TiDB Operator, and TiDB Cloud. This approach no longer suits our documentation structure.
TiDB Cloud now has separate, extensive documentation (500+ pages each) for three plans: Starter, Essential, and Dedicated. Each plan has a distinct TOC, target users, and feature set.
Continuing to maintain all products and plans in a single llms.txt introduces several issues:
- Poor LLM performance: the file is too large and unfocused, increasing the risk of incorrect or irrelevant answers for a specific plan.
- Reduced discoverability: plan-specific documentation cannot be clearly surfaced or promoted.
- Complex maintenance: any TOC change for any product or plan requires modifying the same large file, leading to high maintenance costs and risk of errors.
Solution:
Provide a separate llms.txt page for each product plan that has its own docs TOC.md in English, Chinese, and Japanese.