[maxmad64bis]

Summary

Extends the admin pool visibility route so each pool member also reports per-selector-member set-aside state as memberSetAside: [{ member, avoided, setAside: { kind, since, endsAt, streak } | null }] (proof: src/app/api/admin/proxy-pool-visibility/route.ts +30/−6, toMemberView gains a now parameter frozen once per request and propagated to all four time reads).

The state comes from two new read-only helpers — snapshotMemberSetAside(entryKey, member, nowMs?) reuses readMemberState, the REFUSAL_KINDS loop, the REFUSAL_POLICIES curve and the shared ProxySetAsideSnapshot type, while listEntryMembers(entryKey) enumerates member names from composite memory keys only, never throwing (proof: open-sse/utils/proxyRefusalMemory.ts +60 lines, zero new types).

The read path triggers no probe of any kind: no fetch(, no PUT, no getGroupMembers/switchSelector call — enumeration and snapshots are served from process memory alone, and healthy members report an explicit setAside: null rather than an ambiguous absence (proof: route grep for fetch(, getGroupMembers, switchSelector, includeSecrets: true returns zero hits; zero-probe test extended to ban getGroupMembers).

Related Issues

Follow-up (extension) of #14754, which introduced the entry-level set-aside view in this same route; this PR adds the per-selector-member level underneath it.

Validation

• Change type: other (admin visibility route)
• Focused tests and category gates from the golden path
• npm run lint
• Reconciled with the current active release base; focused checks rerun afterward
• Production-code changes include a new or updated automated test in this PR

Evidence (proxyRefusalMemory.ts +60/−0, route +30/−6, tests +170/−0, no existing test modified): two read-only helpers (member snapshot reusing the shared backoff curve; key-enumeration that never throws), one now frozen per request across all four time reads, five snapshot/listing cases plus one route case (avoided: true with since < endsAt vs avoided: false with setAside: null).

Tests Added Or Updated

• tests/unit/proxy-pool-visibility.test.ts (+170/−0, separate test cases, finally reset): five snapshot/listing cases plus one route case, covering miss, hit, expiry, multi-kind seq rule, guards, and both route states.

Coverage Notes

• The change touches open-sse/ and src/: both new helpers are covered by the five snapshot/listing cases, and the route mapping (ISO formatting, explicit null, frozen now) is covered by the route case.
• No coverage moved down: the route hunk only adds a field plus a frozen timestamp; the existing entry-level assertions are unchanged in the same file.

Reviewer Notes

• Member order in memberSetAside is memory insertion order and is not stable across restarts or post-purge reinsertion (documented in the helper JSDoc); no sorting applied in this route.
• Single commit on the current release base (no stack); the changelog fragment is filed as changelog.d/features/15240-selector-member-set-aside-visibility.md.

[diegosouzapw]

Thanks @maxmad64bis — merged into release/v3.8.52; it ships in the next release.