feat(leveva): CYCLE — self-only channel refresh (P11 slice 295)
charybdis-style `CYCLE <channel>` (extensions/m_cycle.c): part and rejoin a
channel *without races*. Faithful to the real m_cycle, the effect is entirely
client-side for the issuer — `:source PART <chan> :Cycling`, `:source JOIN
<chan>`, then a fresh 353/366 — and nothing changes server-side, so the user
keeps op/voice and place and cannot be locked out by +i/+k/+l or lose a glare.
No new Channels seam (CYCLE never mutates): it composes the read-only
display_name/is_member/names_query accessors. Per-channel gate ladder:
461 no param → 403 nonexistent → 442 not-a-member → success, existence before
membership; the re-sent NAMES honours the issuer's multi-prefix/userhost-in-names.
Divergences (leveva-native, no oracle): self-only/observationally-pure (NOT
member-visible — that would drop ops, destroy a sole-member channel, and desync
peers), fixed :Cycling reason, local-only.
7 command units + cycle_proptest (observational-purity + arbitrary-args) +
golden_cycle; CYCLE.md help + COMMANDS allowlist + index.md.
xeiaso.net