* 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.
* Add v4.0.0b1 changelog and updates entries
* Drop meta note from b1 intro; add #4682 under enhancements
* File #4682 under fixes
* Correct the camelCase rename claim: Python model fields, not the wire
* Baseline the b1 changelog on v3.4.5
* Simplify the beta banner
* Remove 3.x-era compatibility shims
* Require response_type in ctx.elicit()
* Name the utilities path for the two non-re-exported auth helpers
* Point sampling handler migration at its submodule
* Document the issuer_url identity change for upgraders
Adds an upgrade note covering the one-time re-authorization, fixes the MultiAuth examples that pointed issuer_url at the upstream IdP, and corrects the OCI docstring.
* Address review: valid docstring example, narrower reauth scope
* Scope the reauth checklist item to token-minting providers
The imperative ctx.sample()/ctx.list_roots() stay removed, but both
capabilities survive as input-required requests, as tests/conformance
exercises on 2026-07-28. Direct LLM calls remain the recommendation for
generation; roots has no round-trip-budget objection.
* Unpublish v4 development notes; prep docs for beta 1
* Nest development notes under dev-docs/
* Rewrite site-root links in dev notes as absolute URLs for GitHub rendering
Server-side completions (@mcp.completion) shipped in #4582 but the
What's New page didn't mention it. Adds it to the authoring-capabilities
cluster with a runnable example and a link to the servers/completions page.
* v4 docs quality pass: fix stale task/era claims, broken links, writing polish
* whats-new: add the client-side protocol negotiation story
The page told the server half of the era story (serves every era) but
never the client half — that a default Client(url) now negotiates the
modern era, where earlier versions pinned the handshake. Completes the
mental model and links to the client negotiation docs.
* Address review: drop 'complete' over-claim; link mounted-state to Session State
* Archive v3 docs under /v3 and publish v4 as the primary version
* Label primary docs version v4.0.0 (alpha 1)
* Add What's New in v4 page; fix upgrade-guide phrasing; point banner at What's New
* Rewrite What's New around v4's new capabilities, not the sampling deprecation
* Lead What's New with the SDK v2 engine swap and the SEPs it brings
* State ships now (link Session State); tasks arrive next alpha
* Exclude docs/v3 frozen snapshots from doc-example import validation
Server (servers/tasks.mdx) and client (clients/tasks.mdx) docs rewritten for
the extension model: add_extension(TasksExtension()), the guard pattern for
in-task input (no imperative ctx.elicit()), tools-only, and the modern-protocol
requirement (the inverse of the old SEP-1686 legacy-only note). Mechanical
fixes elsewhere for the same reason: telemetry.mdx's tasks/{operation} method
list (get/update/cancel, not result/list), client.mdx's legacy-only feature
list (tasks moved to modern-only) and extension-composition paragraph
(describes the tasks ClientExtension, not the removed notification binding),
and stale SEP-1686 references in the FastMCP 2 upgrade guide. v4-notes status
lines updated to Shipped (#4602, #4603).
fastmcp.types re-exported 29 mcp_types symbols verbatim, which was
pointless indirection users had to discover. It now holds only Textarea,
the one type FastMCP actually defines; everything else imports from
mcp_types directly. These mirrors were added during unreleased SDK v2
migration work and never shipped, so this is not a breaking change.
* Fix broken code examples in docs
- Tag error output blocks as ```text instead of ```python (anthropic,
openai integration docs + v2 mirrors)
- Quote unquoted URL in Descope config example (+ v2 mirror)
- Fix GoogleGenAISamplingHandler → GoogleGenaiSamplingHandler casing
in sampling docs
- Fix import path: handlers.GoogleGenaiSamplingHandler →
handlers.google_genai.GoogleGenaiSamplingHandler in v3-features
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Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
* Fix remaining broken doc examples and add skip tags for false positives
- BearerTokenAuth → StaticTokenVerifier in deployment/http.mdx
- providers.oauth → server.auth import in authentication.mdx
- ListToolsNext → updated list_tools API in v3-features.mdx
- OAuthClientProvider → OAuth in v2/storage-backends.mdx
- Add test="skip" for upgrade guides, contrib placeholders, f-string backticks
🤖 Generated with Claude Code
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
* Ratchet doc example baselines to zero
All 1444 examples now pass syntax and import checks.
🤖 Generated with Claude Code
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
* Add pytest-examples dev dep, fix client_id in StaticTokenVerifier example, commit missed openapi fixes
- Add pytest-examples to dev dependencies (fixes CI ModuleNotFoundError)
- Include required client_id in StaticTokenVerifier token payload
- Commit previously unstaged HTTPRoute import fixes in openapi.mdx
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Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
* Update deprecated import paths across docs
- fastmcp.server.openapi → fastmcp.server.providers.openapi
- fastmcp.server.proxy → fastmcp.server.providers.proxy
- fastmcp.server.apps → fastmcp.apps
- Tag upgrade guide "Before" examples with test="skip"
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Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
