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MSC4499: Strict server signing key caching and key ID uniqueness#4499

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gamesguru:guru/4499-strict-key-caching
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MSC4499: Strict server signing key caching and key ID uniqueness#4499
gamesguru wants to merge 1 commit into
matrix-org:mainfrom
gamesguru:guru/4499-strict-key-caching

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@gamesguru

@gamesguru gamesguru commented Jul 5, 2026

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Standardizes server signing key caching and introduces a First Seen Wins rule for key ID uniqueness.

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Current (baseline Synapse) Complement results: (9 pass / 1 skip / 7 fail)

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Current (continuwuity impl) Complement results: (10 pass / 0 skip / 4 fail)

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Signed-off-by: Shane Jaroch <chown_tee@proton.me>
@turt2live turt2live added proposal A matrix spec change proposal. Process state. A-Federation Server-to-Server API (federation) kind:maintenance MSC which clarifies/updates existing spec needs-implementation This MSC does not have a qualifying implementation for the SCT to review. The MSC cannot enter FCP. labels Jul 6, 2026

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Implementation requirements:

  • Server following guidance (backwards compatibility) - ideally multiple

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A-Federation Server-to-Server API (federation) kind:maintenance MSC which clarifies/updates existing spec needs-implementation This MSC does not have a qualifying implementation for the SCT to review. The MSC cannot enter FCP. proposal A matrix spec change proposal. Process state.

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2 participants