marfrit
4ac9296f08
The result of the bullpen campaign, carried out by @deus as operator with
@coder on versions.lua (job 1158). Both conformance suites green, attested with
0 open points; the record is on branch kampagne/2026-07-28 in this repo.
What it does:
versions.lua M.SUPPORTED gains 2026-07-28, old version first so an existing
client keeps negotiating what it always did.
lmcp.lua requires envelope; routes on req._legacy, so initialize, ping
and logging/setLevel keep answering the old shape while the new
protocol gets the envelope path. resultType defaults to
"complete" on every result.
envelope.lua new -- header and body checks, returns the -32020 family.
104 of the 180 added lines in lmcp.lua are comments: the campaign also carried
the German-to-English translation, so the diff looks larger than the behaviour
change is.
NOT yet on master. lmcp runs on around ten hosts in this fleet; a green suite
says the spec is satisfiable, not that it is complete or true. This branch
exists so a second pair of eyes reads it before it reaches any of them.
The copy fix in versions.lua (err.data.supported handed out as a COPY, so a
caller cannot hijack the module table) predates this work -- it was the
uncommitted German state, archived on wip/lmcp-deutsch-2026-08-09.
55 lines
2.0 KiB
Lua
55 lines
2.0 KiB
Lua
local M = {}
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function M.check(header, body)
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if not header or not body then
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return false, -32600, "Invalid Request"
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end
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-- Rule 1: header['mcp-protocol-version'] missing
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if not header['mcp-protocol-version'] then
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return false, -32020, 'Missing required header: MCP-Protocol-Version'
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end
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-- Rule 2: header['mcp-method'] missing
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if not header['mcp-method'] then
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return false, -32020, 'Missing required header: Mcp-Method'
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end
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-- Rule 2: header['mcp-method'] ~= body.method
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if header['mcp-method'] ~= body.method then
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return false, -32020, 'Mcp-Method header does not match body'
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end
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-- Rule 3: Mcp-Name header required for tools/call, resources/read, prompts/get
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local method = body.method
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local params = body.params or {}
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if method == 'tools/call' or method == 'prompts/get' then
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if not header['mcp-name'] or header['mcp-name'] ~= params.name then
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return false, -32020, 'Mcp-Name header does not match body'
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end
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elseif method == 'resources/read' then
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if not header['mcp-name'] or header['mcp-name'] ~= params.uri then
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return false, -32020, 'Mcp-Name header does not match body'
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end
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end
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-- Rule 4: _meta required fields (located under params._meta)
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local meta = (body.params or {})._meta or {}
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if not meta['io.modelcontextprotocol/protocolVersion'] then
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return false, -32602, 'Missing required _meta field: io.modelcontextprotocol/protocolVersion'
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end
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if not meta['io.modelcontextprotocol/clientCapabilities'] then
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return false, -32602, 'Missing required _meta field: io.modelcontextprotocol/clientCapabilities'
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end
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-- Rule 5: header['mcp-protocol-version'] ~= meta['io.modelcontextprotocol/protocolVersion']
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if header['mcp-protocol-version'] ~= meta['io.modelcontextprotocol/protocolVersion'] then
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return false, -32020, 'Header MCP-Protocol-Version does not match _meta protocolVersion'
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end
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-- Success
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return true, nil, nil
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end
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return M
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