* fix(matrix): remove memberCount heuristic from DM detection
The memberCount === 2 check in isDirectMessage() misclassifies 2-person
group rooms (admin channels, monitoring rooms) as DMs, routing them to
the main session instead of their room-specific session.
Matrix already distinguishes DMs from groups at the protocol level via
m.direct account data and is_direct member state flags. Both are already
checked by client.dms.isDm() and hasDirectFlag(). The memberCount
heuristic only adds false positives for 2-person groups.
Move resolveMemberCount() below the protocol-level checks so it is only
reached for rooms not matched by m.direct or is_direct. This narrows its
role to diagnostic logging for confirmed group rooms.
Refs: #19739
* fix(matrix): add conservative fallback for broken DM flags
Some homeservers (notably Continuwuity) have broken m.direct account
data or never set is_direct on invite events. With the memberCount
heuristic removed, these DMs are no longer detected.
Add a conservative fallback that requires two signals before classifying
as DM: memberCount === 2 AND no explicit m.room.name. Group rooms almost
always have explicit names; DMs almost never do.
Error handling distinguishes M_NOT_FOUND (missing state event, expected
for unnamed rooms) from network/auth errors. Non-404 errors fall through
to group classification rather than guessing.
This is independently revertable — removing this commit restores pure
protocol-based detection without any heuristic fallback.
* fix(matrix): add parentPeer for DM room binding support
Add parentPeer to DM routes so conversations are bindable by room ID
while preserving DM trust semantics (secure 1:1, no group restrictions).
Suggested by @KirillShchetinin.
* fix(matrix): override DM detection for explicitly configured rooms
Builds on @robertcorreiro's config-driven approach from #9106.
Move resolveMatrixRoomConfig() before the DM check. If a room matches
a non-wildcard config entry (matchSource === "direct") and was
classified as DM, override the classification to group. This gives users
a deterministic escape hatch for misclassified rooms.
Wildcards are excluded from the override to avoid breaking DM routing
when a "*" catch-all exists. roomConfig is gated behind isRoom so DMs
never inherit group settings (skills, systemPrompt, autoReply).
This commit is independently droppable if the scope is too broad.
* test(matrix): add DM detection and config override tests
- 15 unit tests for direct.ts: all detection paths, priority order,
M_NOT_FOUND vs network error handling, edge cases (whitespace names,
API failures)
- 8 unit tests for rooms.ts: matchSource classification, wildcard
safety for DM override, direct match priority over wildcard
* Changelog: note matrix DM routing follow-up
* fix(matrix): preserve DM fallback and room bindings
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Co-authored-by: Tak Hoffman <781889+Takhoffman@users.noreply.github.com>
