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## #1306 — Disambiguate "collisions" terminology + surface WHICH collides (WIP draft) Red commit pending CI URL. ### What **A. Terminology fix** — Prefix Tool currently labels theoretical-math collisions ("38 two-byte collisions") with the same word the Collisions tab uses for packet-traffic-observed collisions ("0 two-byte"). Operators saw contradictory counts and assumed a bug. - Prefix Tool Network Overview cards: replace bare "collisions" with "address conflicts at this hash size" / "would-collide-if-used" wording. - Cross-reference line: "These are theoretical conflicts that would occur IF all repeaters used this hash size. For collisions actually observed in packet traffic, see the Hash Issues tab." → links to `#/analytics?tab=collisions`. - Collisions tab: reverse pointer "Collisions observed in actual packet traffic. For theoretical conflicts at each hash size, see the Prefix Tool tab." → links to `#/analytics?tab=prefix-tool`. **B. Expandable "which collides" list** — Aggregate count "38 colliding 2-byte slices" is unactionable. Operators need to see which slice and which nodes share it. - Per tier, when `opCollisions[b] > 0` OR `stats[b].collidingPrefixes > 0`, render a "Show N colliding slices →" toggle below the count. - Expanding reveals a `Prefix · Nodes sharing` table with node-detail links (`#/nodes/<pubkey>`), scrollable above 50 entries. - Both flavors rendered: theoretical (across all repeaters) and operational (configured-for-this-size only). The operational list is the higher-priority signal. Data is already in `idx[b]` — no backend changes. ### E2E `test-issue-1306-collisions-terminology-e2e.js` asserts wording, cross-ref links, expand-toggle, and node links present. RED commit only ships the test; GREEN commit adds the production code. Fixes #1306 --------- Co-authored-by: Kpa-clawbot <bot@kpa-clawbot.local>