Commit graph

6 commits

Author SHA1 Message Date
Jeremiah Lowin
8cf4506aa9
Publish FastMCP 4 (alpha) docs to gofastmcp.com (#4624) 2026-07-23 21:21:01 -04:00
Bill Easton
d6b55c0b2f
Raise on unhandled content types in sampling handler dispatch chains (#3857)
* Raise on unhandled content types in sampling handler dispatch chains

The Anthropic and OpenAI sampling handlers have isinstance chains that
dispatch on MCP content types but silently drop unhandled variants like
EmbeddedResource and ResourceLink. This adds explicit else-raise guards
to match the Gemini handler's behavior and the single-content dispatch
paths that already raise.

Raising is the right choice over warn-and-skip: a partial conversion
produces a plausible-but-wrong LLM response (the model confidently
answers based on incomplete input), which is worse than a clear error
that tells the user exactly what isn't supported.

🤖 Generated with Claude Code

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* Add tests for unsupported content type raises in sampling handlers

Tests the new ValueError raises for unsupported content types
(e.g. EmbeddedResource) in the Anthropic and OpenAI message
conversion loops. Uses model_construct to bypass Pydantic's
union validation since the raise is a defensive guard for
future SDK content types.

🤖 Generated with Claude Code

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
2026-04-12 12:52:31 -04:00
Jeremiah Lowin
c397e68d39
Update ty ignore comments for 0.0.25 compatibility (#3614) 2026-03-24 20:26:26 -04:00
Jeremiah Lowin
734b93b999
Support ImageContent and AudioContent in sampling handlers (#3550)
* feat: support ImageContent and AudioContent in sampling handlers

Co-authored-by: Claude <noreply@anthropic.com>

* Validate image MIME types, fix silent drop in assistant list messages

* Reject image/audio in assistant messages with tool_calls

* Reject ImageContent in assistant messages for Anthropic

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Co-authored-by: Claude <noreply@anthropic.com>
2026-03-18 15:25:16 -04:00
Jeremiah Lowin
2218a6f52a
Use max_completion_tokens instead of deprecated max_tokens in OpenAI handler (#3254)
🤖 Generated with Claude Code

Co-authored-by: Marvin Context Protocol <41898282+Marvin Context Protocol@users.noreply.github.com>
Co-authored-by: Jeremiah Lowin <jlowin@users.noreply.github.com>
2026-02-20 19:31:38 -05:00
Jeremiah Lowin
da77cfa73f
Unify SamplingHandler and promote OpenAI handler (#2616)
* Unify SamplingHandler and promote OpenAI handler

Consolidates ServerSamplingHandler and ClientSamplingHandler into a single
SamplingHandler type alias. Moves OpenAISamplingHandler from experimental
to fastmcp.client.sampling.handlers.openai as the canonical location.

Backwards compatibility maintained for imports from experimental.

* Remove unreachable code paths in OpenAI handler

* Fix docstring and use elif for mutually exclusive branches
2025-12-14 15:22:43 -05:00
Renamed from tests/experimental/sampling/test_openai_handler.py (Browse further)