Add platform tool catalog fingerprint and hashOnly mode#7840
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July 15, 2026 15:51
…ures Compute a deterministic fingerprint of the platform tool catalog over each tool's name, description, input schema and annotations, sorted so it is stable regardless of enumeration order. Expose it via getCatalogHash() and include it in the mcp-get-features response. Add a hashOnly request option that returns only the fingerprint, letting a caller cheaply detect whether the catalog changed before pulling the full tool list. Backwards compatible: callers that ignore the field still receive the full list as before.
Fold each tool's title and _meta into computeCatalogHash and carry _meta through the wire tool definitions, so a change to either shifts the catalog fingerprint and a caller can detect it. Previously a title-only change left the fingerprint unchanged.
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## main #7840 +/- ##
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- Coverage 75.11% 75.04% -0.07%
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Files 430 430
Lines 22846 22867 +21
Branches 6055 6063 +8
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- Misses 5686 5707 +21
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Description
Adds a fingerprint to the platform automation tool features so a client can detect whether the platform tool catalog changed before pulling the full definition list.
computeCatalogHash(tools)— a cheap, non-cryptographic fingerprint over each tool's name, title, description, inputSchema, annotations and_meta, sorted for stability across enumeration order.PlatformAutomationHandlercaches it (getCatalogHash()) and includescatalogHashin theautomation:mcp-get-featuresreply.hashOnlyrequest returns{ catalogHash }without the full tool list, so a poller can skip the full fetch when the catalog is unchanged.Backwards compatible: a caller that ignores
catalogHashand never sendshashOnlygets the full list exactly as before.Related
FlowFuse/engineering#129