Issues

• History visibility is not clearly defined for state events (Spec seems wrong & disagrees with current and sensible server implementations)

  clarification
  matrix-org/matrix-spec#2460 · Filter by author reivilibre opened on Oct 13, 2026
  1

• Policy server public key examples use URL-safe base64, but the prose says standard unpadded base64

  matrix-org/matrix-spec#2458 · Filter by author bardiharborow opened on Oct 12, 2026
  2

• m.key.verification.accept lists method as required but never defines it

  matrix-org/matrix-spec#2456 · Filter by author bardiharborow opened on Oct 12, 2026

• Advertising old signing keys via old_verify_keys has ambiguities

  clarification
  matrix-org/matrix-spec#2453 · Filter by author timedoutuk opened on Oct 7, 2026

• Switch toward time-based fallback key rotation

  improvement
  matrix-org/matrix-spec#2445 · Filter by author poljar opened on Sep 17, 2026
  3

• /room_summary has no way to express absent join_rule when the m.room.join_rules event is absent/invalid

  improvement
  matrix-org/matrix-spec#2444 · Filter by author MadLittleMods opened on Sep 15, 2026
  3

• Handling of m.mentions and notifications.room in m.room.power_levels not explicit

  clarification
  matrix-org/matrix-spec#2443 · Filter by author Johennes opened on Sep 14, 2026
  2

• Spec doesn't explicitly forbid changing the ed25519 signing key of a device

  A-E2EEclarificationspec-omission
  matrix-org/matrix-spec#2442 · Filter by author tulir opened on Sep 12, 2026
  1

• Include SAS emoji translations in spec release documentation

  release-blocker
  matrix-org/matrix-spec#2439 · Filter by author turt2live opened on Sep 8, 2026
  

• Spec's NACL allusions are ambiguous to ZIP-215 vs. strict RFC 8032 ed25519 signing key algos

  clarification
  matrix-org/matrix-spec#2437 · Filter by author gamesguru opened on Aug 26, 2026

• Missing example for m.key.verification.start$m.reciprocate.v1

  clarification
  matrix-org/matrix-spec#2436 · Filter by author HarHarLinks opened on Aug 25, 2026

• State resolution when one (or more) prev_events is unknown, unresolvable, or external

  clarification
  matrix-org/matrix-spec#2434 · Filter by author gamesguru opened on Aug 11, 2026

• Add necessity to check MSCs for clear requirement levels to checklist

  matrix-org/matrix-spec#2431 · Filter by author HarHarLinks opened on Aug 5, 2026
  4

• Spec requires support for exponential notation in JSON

  spec-bug
  matrix-org/matrix-spec#2424 · Filter by author richvdh opened on Jul 21, 2026

• X-Matrix authentication header makes request buffering necessary, but it doesn't actually need to depend on the request content

  matrix-org/matrix-spec#2423 · Filter by author reivilibre opened on Jul 20, 2026

• Store spec implementation guides in an appendix of the spec

  matrix-org/matrix-spec#2420 · Filter by author HarHarLinks opened on Jul 15, 2026

• Clarify how to handle key sharing wrt history visibility for invites

  clarification
  matrix-org/matrix-spec#2419 · Filter by author HarHarLinks opened on Jul 15, 2026
  1

• Rejoinability of (empty) rooms the local server has left is not well-defined

  clarification
  matrix-org/matrix-spec#2415 · Filter by author tulir opened on Jul 13, 2026
  1

• Inconsistency of m.room.power_levels definition with room verion 12 (MSC4289)

  spec-bug
  matrix-org/matrix-spec#2409 · Filter by author gewitternacht opened on Jul 10, 2026
  1

• Add a checklist to the security considerations template?

  matrix-org/matrix-spec#2405 · Filter by author Johennes opened on Jul 1, 2026

• Room summary API is missing authentication options

  clarification
  matrix-org/matrix-spec#2393 · Filter by author famfo opened on Jun 8, 2026

• Auth rules for PL events don't say if the default value counts as "present" or not

  clarification
  matrix-org/matrix-spec#2388 · Filter by author kegsay opened on Jun 2, 2026
  2

• MSC4186 Sliding Sync seems to be missing high-level stewardship on pagination strategies

  matrix-org/matrix-spec#2378 · Filter by author reivilibre opened on May 13, 2026
  4

• UserID type not used consistently

  clarification
  matrix-org/matrix-spec#2365 · Filter by author gewitternacht opened on Apr 28, 2026
  2

• Grammar for account data types

  clarification
  matrix-org/matrix-spec#2356 · Filter by author richvdh opened on Apr 16, 2026
  1