Commit-2 docs census (measured 2026-09-09, worktree at 5ca85851, docs-site/src + crates/spt/src):

PUBLISHED closed sets that need a sibling row/clause:
  fork    docs-site/src/instances/overview.md:67 (PROSE, not a table) "A request that goes
          unanswered is reported as FORK_UNCONFIRMED: - never as forked". Section doc-tagged
          at :51 [doc->REQ-FORK-CONTROL-SURFACE]. -> needs a sibling sentence for the silent case.
  redeem  docs-site/src/networking/knocking.md:203 "### What you can be told" TABLE, row :209
          "**unconfirmed** | **no answer came back at all**", plus the :211 paragraph "silence is
          not a refusal". Page doc-tagged at :3 [doc->REQ-KNOCK-VERBS] et al.
          -> needs a sibling row (and the paragraph must stay true: a held stream is ALSO not a
          refusal and the code is ALSO not spent).

NOT published anywhere - no row, none added, stated in the commit body:
  knock     CLI prints KNOCK_UNCONFIRMED (cli.rs:17502). Zero docs-site occurrences.
  answer    classify_answer_send -> AnswerSendOutcome::Unconfirmed (wansend.rs:1760). No token
            grep'd in docs-site; no published outcome surface at all.
  presence  Presence::Unknown is a WIRE enum in spt-net; no published presence vocabulary in
            json-shapes.md or elsewhere (swept: only an unrelated prose "presence" at :215).

Exact printed tokens for the record: FORK_UNCONFIRMED:, KNOCK_UNCONFIRMED:, KNOCK_REDEEM_UNCONFIRMED:
(the redeem token is KNOCK_REDEEM_UNCONFIRMED, not REDEEM_UNCONFIRMED).

ONE SHAPE QUESTION FOR YOU, presence only. Your rule is "its OWN distinct expiry variant in its
outcome family". Four twins have a local outcome enum in wan.rs and take the variant cleanly.
request_presence does NOT: it returns spt_net::net::presencemsg::Presence, a WIRE enum whose every
variant has a token() and is mintable by from_token. A Presence::PeerSilent there would be a
local-only variant on a wire type - PresenceReply::of() would owe it a token it can never receive.
My proposal: leave the wire enum alone and add a local wrapper in wan.rs, on the pattern of the
other four -- PresenceRequestOutcome { Answered(Presence), PeerSilent } -- so request_presence's
signature changes and wansend.rs:678 (which today does unwrap_or(Presence::Unknown)) maps it.
That is the one deviation from "a variant in the family"; say if you want it a different way.