stacklok / toolhive / 30364782972

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github

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Commit Message

Replace vMCP Modern kill-switch with a capability gate (#6033)

Delete the TOOLHIVE_VMCP_MODERN_STATELESS env var and gate MCP
2026-07-28 (Modern) dispatch on instance capabilities instead:
modernDispatchBlockers() enumerates enabled features the stateless
path cannot serve (currently the optimizer, tracked for parity in
#6089). A gated instance steers Modern-first clients onto the Legacy
handshake via the SDK's discover answer and refuses direct Modern
requests with a conformant -32022.

sessionmanager.New now rejects an optimizer configured without
AdvertiseFromCore, closing a fail-open path where the gate saw no
blocker while the optimizer indexed without serving anyone.

Operator session-semantics e2e specs are ported onto era-pinned
RawMCPClient primitives (mcpcompat cannot pin a revision, #5911), and
the raw client parses SSE-framed POST responses.

Closes #5959. Follow-ups: #6101, #6102, #6103, #6104.

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86 of 86 new or added lines in 9 files covered. (100.0%)

13 existing lines in 5 files now uncovered.

81703 of 116948 relevant lines covered (69.86%)

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