build: bump rmcp 3.0.0 -> 3.1.0 - #323
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Picks up stateless-protocol conformance fixes from the rmcp 3.1.0 release. Document the one runtime-observable change: transport-http now unconditionally rejects non-initialize stateless POSTs at protocol >= 2026-07-28 that omit request _meta.
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August 5, 2026 02:10
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Summary
rmcp(andrmcp-macros) from 3.0.0 to 3.1.0, picking up stateless-protocol conformance fixes tied to MCP spec 2026-07-28.transport-http's stateless (non-initialize) POST handling now unconditionally rejects a/mcprequest at protocol>= 2026-07-28that omits_meta.protocolVersion/_meta.clientCapabilities, returningHTTP 400/-32602where 3.0.0 accepted it. Not gated bystateless_protocol_metadata_required(mcpls does not set it). Scope: only affects non-rmcp/hand-rolled HTTP clients at that protocol version;transport-httpis opt-in and off by default in release binaries.rmcp 3.0.0version reference in atransport.rsdoc comment.No source changes were needed beyond the doc comment fix — verified by building against both versions and A/B testing the HTTP wire behavior.
Closes #296.
Test plan
cargo build --workspace --all-featurescargo clippy --all-targets --all-features --workspace -- -D warningscargo nextest run --workspace --all-features --lib --bins(643 passed)cargo nextest run --workspace --all-features(674 passed)cargo nextest run --workspace --all-features -- --ignorede2e MCP protocol/handshake suite (13 passed)cargo test --doc --workspace --all-features(12 passed)cargo audit— 0 vulnerabilities, 0 yankedcargo deny check advisories bans licenses sources— all passcargo +nightly fmt --all -- --checkRUSTFLAGS="-D warnings" RUSTDOCFLAGS="--deny rustdoc::broken_intra_doc_links" cargo doc --no-deps --all-features --workspace