[dzucker-tab]

Summary

• Publish one llms-*.txt file per extension surface during the docs build, and replace llms.txt with a map of those files so an agent loads a single product area.
• Link the index and domain files from the page head and the footer. llms-full.txt stays generated and unlinked. Workspace extensions are omitted because this site has no docs/workspaceext pages.

Test plan

• Confirm the proof workflow yarn build succeeds with the frozen lockfile
• Open llms.txt and confirm it lists Data Apps, Dashboard Extensions, Viz Extensions, Core, Extension Fundamentals, Design Guidelines, and Reference
• Confirm each linked domain file is present and llms-workspaceext.txt is absent
• Confirm the footer links resolve to those files