fastmcp/docs/development
Jeremiah Lowin 7339936980
Rewrite the v4 What's New page and document server extensions (#4698)
* Rewrite the v4 What's New page

Teach the headline features with code instead of asserting them, drop the
major-version throat-clearing and SEP list, and correct the elicitation
claim: ctx.elicit() is unchanged and handshake-only, while sampling and
roots are removed outright.

* Fix broken doc links and stale version references

Repoint five dead links and anchors, refresh v3-era version examples on the
v4 docs, and add the missing FastMCP 3 entry to the installation page's
upgrade section.

* Document server extensions

add_extension() shipped in v4 with no documentation page. Covers the
extension interface, request methods, tool-call interception, lifespan
ownership, and the client half.

* Link the FastMCP TypeScript library

* Address Codex review feedback

Gate the extension interceptor on the client's per-request opt-in rather
than claiming negotiation does it; show the v4 beta pin on the install
page instead of a version a reader cannot get; note that UserSession
requires authentication.
2026-07-28 20:05:45 -04:00
..
contributing.mdx Align CLI, deployment, and config docs (#4259) 2026-07-19 14:24:07 -04:00
releases.mdx Rewrite the v4 What's New page and document server extensions (#4698) 2026-07-28 20:05:45 -04:00
tests.mdx Merge remote-tracking branch 'origin/main' into feature/client-auto-default 2026-07-20 12:33:38 -04:00