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d910ea0208
Fixes #1638. ## Problem `getConfidenceIndicator` in `public/nodes.js` treats every observation as equal evidence, so a node seen 5 times via 1-byte hash prefixes (which collide ~8-way across a typical mesh) scores the same as a node seen 5 times via 6-byte prefixes (effectively unambiguous). The user asked for confidence to respect ambiguity. ## Change - `cmd/server/neighbor_graph.go` — new `CountsByMode map[int]int` on `NeighborEdge`, bumped in `upsertEdge` / `upsertEdgeWithCandidates` based on the observation's hash-prefix byte length (1/2/4/6). Merged in `resolveEdge` when ambiguous→resolved edges collapse. - `cmd/server/neighbor_api.go` — `NeighborEntry.counts_by_mode` exposed (omitempty), and `dedupPrefixEntries` merges per-mode counts when an unresolved prefix entry collapses into a resolved one. Flat `Count` field preserved for back-compat. - `public/nodes.js::getConfidenceIndicator` — weights observations by mode: 1-byte=0.125, 2-byte=0.5, 4/6-byte=1.0. A single 6-byte sighting counts ~8× a raw 1-byte one. HIGH triggers when EITHER the legacy heuristic clears OR weighted count ≥3. Legacy entries without `counts_by_mode` keep working (default weight 0.5). - Tooltip now shows the per-mode breakdown (e.g. "Observations: 5 (1-byte: 3, 6-byte: 2)"). ## TDD - RED: `cmd/server/neighbor_graph_test.go::TestBuildNeighborGraph_CountsByMode` — fixture with 1/2/4-byte sightings asserts per-mode tally (commit `838965f3`). - RED: `test-confidence-indicator.js` — 6-byte mostly-sighted neighbor must outrank 1-byte mostly-sighted neighbor at equal flat count (commit `4bd5e18e`). - GREEN: implementation in commit `7511606d`. All 4 JS tests pass; new Go test passes; full Go suite passes (two pre-existing flakes unrelated, both pass when isolated). ## Browser verification Synthetic side-by-side of OLD vs NEW classifier against representative inputs — see screenshot. 1-byte-only and 6-byte-only at the same flat count diverge from MEDIUM/MEDIUM to MEDIUM/HIGH, and 3 6-byte sightings now upgrade where 20 1-byte sightings stay MEDIUM. ## Preflight overrides - check-branch-scope: cross-stack: justified — backend exposes the new `counts_by_mode` field and the frontend consumes it; the whole point of the change. ## Compat - `Count` field unchanged in shape and value. - `counts_by_mode` is `omitempty`; legacy persisted edges (loaded from `neighbor_edges` via `neighbor_persist.go`) get no per-mode breakdown and fall back to the default weight (0.5) — no UI regression. --------- Co-authored-by: bot <bot@local> Co-authored-by: corescope-bot <bot@corescope.local>