Release / v26.4.21

Builds: c7319f2 – 4016b46

• Archived Microsoft AGT outreach thread and April 2026 reply in the documentation
• Automated synchronization of REFERENCES.md to the site’s references page

Development Log

• docs(outreach): archive MSFT AGT thread and 2026-04-21 reply (#144) (c7319f2)
• build(site): auto-sync REFERENCES.md → site/src/content/docs/references.md (#145) (4016b46)