docs: members-only matchmaking at scale — design log (DO NOT MERGE yet) - #475
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docs: members-only matchmaking at scale — design log (DO NOT MERGE yet)#475metis-sprock wants to merge 3 commits into
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When a player is in an active Arena/Combat match, party follow events are now ignored. The party waits until the player returns to social. Also adds a fast-path check (isFollowerAlreadyInLeaderMatch) to skip redundant follow processing when the follower is already in the leader's match, preventing unnecessary "Joined party group" churn. Observed in production: player mid-match was yanked back to social when their party leader hit matchmaking. Fixes #460
When the party follow path directs a player to a social lobby they're already in, it's now silently treated as success instead of producing an error. Fixes #462
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Draft / discussion artifact — do not merge. Resume point for the members-only-at-scale design.
Captures the full design + the grounded current-state (with file:line citations) so we don't re-investigate when we come back:
RoleCacheblob with O(guild-size) write-amplification per change + 60s full reload; gate Branch A (in-mem) vs Branch B (live Discord on the hot path, fails open); purely lazy population;GuildMemberAddno-op; no role-change handlers; no JWT claims; 30s deny-retry already exists.Next: get EVRL's config, run through
/review-plan, then scope implementation. Related: #228, #467.