#2551/#3182/#2361 are pre-migration get-shit-done-redux issue numbers with no
equivalent in open-gsd/gsd-core; they mislead triage and manufacture phantom
blockers. Repoint to real successors (#717 byte-budget rework, #720) or rewrite
as prose referencing the discuss-phase/modes progressive-disclosure split.
Correct co-located 'line budget'/'<500 lines' framing to the byte-based reality
(#717). Add a CI guard (tests/no-phantom-issue-refs.test.cjs) that fails if a
phantom ref is reintroduced. SSH-key patterns (id_ed25519) left untouched.
No user-facing runtime behavior change.
Closes#1073
3a3b2135c2