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efitenandClaude Opus 5
d1b615fc0d
Closes #2056. ## What changes The node detail "Heard By" card now lists only observers that received the node's **own transmission off the air**, and reports the rest as a count. ``` HEARD BY — DIRECT (8 OBSERVERS) OBSERVER REGION PACKETS AVG SNR AVG RSSI BE-DUF-SiSCD-01 — 16276 7.9 dB -108 dBm BE-BRU-Moris repeater — 13775 -5.6 dB -122 dBm ... Seen via relay by 29 observers. Those observers heard a repeater that forwarded this node's traffic, not this node. ``` and for a node nothing hears: ``` HEARD BY — DIRECT (0 OBSERVERS) No observer is within radio range of this node. Seen via relay by 2 observers. … ``` ## The rule, and where it comes from Read out of the firmware rather than assumed: | | | |---|---| | `Packet.h:83` | `setPathHashSizeAndCount(sz,n) { path_len = ((sz-1)<<6) \| (n&63); }` — hash size rides in the packet's `path_len` byte | | `Mesh.cpp:649,678` | only `sendFlood()` sets it, so the **originator** decides; `CommonCLI.h:69` defaults `path_hash_mode = 0`, i.e. one byte | | `Mesh.cpp:349` | a forwarding repeater appends its hash with the packet's size — it cannot upgrade a packet, and the **last hop is who was heard** | | `Mesh.cpp:89,103` | on a direct route a forwarder matches the head of the path and calls `removeSelfFromPath` before retransmitting, so the path is the **remaining** route and the transmitter is not in it | So an observation credits exactly one node: 1. Route type must be `ROUTE_TYPE_FLOOD` or `ROUTE_TYPE_TRANSPORT_FLOOD`. Direct routes never qualify (38% of transmissions over 7 days). 2. Empty path → the originator, known only for ADVERTs. 3. Otherwise the last hop. 4. The hop must resolve to exactly one candidate. Same gate `resolvePathForObsColdLoad` already applies: under-attribute rather than guess. It drops 418,530 of 1,455,721 flood observations with a path over 7 days (28.8%), and it is what stops the wrong-band credits. ## Measured effect | node | before | after | |---|---|---| | BE-BRU-Moris | 36 observers | 3 | | BE-KRO-RP01 \| ON1KW | 40 | 3 | | BE-BRE-ON8AR | 38 | 2 | | NL-BXE-RP01 \| 433 | 35 | 0 | Network-wide over 7 days, 234 of 1,860 nodes have at least one direct observer (161 have exactly one, maximum 8). The direct list is therefore empty for most nodes, with the relay count below it. That is the correct reading: no observer is in radio range of them. Independent corroboration on staging: for BE-WIL-3EIK-01 the eight direct observers are exactly the top eight entries of its Neighbors table by score and observation count. ## Perf justification `GetNodeHealth` is fast today precisely because it never walks observations — it uses one representative observation per transmission. Direct-RF needs the per-observation path, and that cannot be a per-request walk: the reference store holds **232,928 transmissions / 2,887,861 observations**, one node's `byNode` slice alone holds **55,458 transmissions / 1,450,544 observations**, and `/api/nodes/bulk-health?limit=200` would multiply that. So the aggregate is rebuilt by a background recomputer on the existing `newAnalyticsRecomputer` pattern, published into an `atomic.Value`. Reads are `O(direct observers)`, which is **cheaper than before** — the old code built per-observer sums over every transmission in `byNode` on every request. Proof, `BenchmarkBuildDirectHeardIndex`: ``` BenchmarkBuildDirectHeardIndex-12 1 63067900 ns/op ``` 3,000,000 observations (60,000 transmissions × 50 observations, 8-hop paths, 64 candidate repeaters) in **63 ms**, once per recompute interval. Per observation the walk does one route-type check, one backward scan of `PathJSON` for the last quoted token (no allocation, no `json.Unmarshal`), one prefix-map lookup and one counter update. Rebuilding wholesale also means eviction needs no bookkeeping: a pass simply does not see evicted transmissions. The alternative — a field on `StoreObs` updated incrementally — would have needed the call at five construction sites (`store.go:942,1264,2854,3179`, `chunked_load.go:609`), which is the duplication that caused #1558, plus matching decrements at eviction. ## API Both `GetNodeHealth` and `GetBulkHealth` carried a near-identical copy of the observer loop; they now share one builder. - `observers` — direct-RF only. Same field names, so no client migration. Rows are a named `HealthObserverRow` instead of `map[string]interface{}` (one fewer occurrence in a touched file, per the AGENTS.md ratchet). - `relayObserverCount` — new integer, observers that saw traffic through the node without hearing it. `stats.totalPackets` and `stats.avgHops` still count relayed traffic, so without this number the card would contradict the figures printed beside it. `docs/api-spec.md` is updated for both endpoints. It also documented an `iata` field on these rows that the endpoint has never emitted; removed. ## Tests - `cmd/server/direct_heard_test.go` — table test over the rule: flood with empty path and known originator, flood whose last hop is the node, flood whose last hop is another node, direct and transport-direct routes (never credit), ambiguous last-hop prefix, listener-only candidate, 1-byte and 2-byte hop sizes; plus aggregation and row-building. - `cmd/server/node_health_direct_rf_test.go` — end-to-end through the handler: an observer that only saw relayed traffic must not appear in `observers` but must be counted in `relayObserverCount`. Plus the benchmark. - `tests/unit/test-direct-rf-heard-by.js` — slices the card template out of `public/nodes.js` and evaluates it, so it tests the shipped markup rather than a copy: heading, empty state, relay line, singular/plural, signal columns, listener/repeater badge tri-state. - `cmd/server/node_health_can_relay_case_1290_test.go` — updated to seed a genuinely direct reception, since a relay-only observer no longer carries a badge. - `cmd/server/analytics_recompute_after_load_test.go` — recomputer count 10 → 11. Verified locally: `cmd/server` suite green, `sh test-all.sh` green (180 suites), `tests/e2e/test-e2e-playwright.js` 131/134 passed with 3 skipped and 0 failures against the seeded fixture, plus `test-issue-1147-section-order-e2e.js`, `test-issue-1151-orphan-separators-e2e.js` and `test-issue-1281-location-row-e2e.js`, which all assert on this card. `gofmt` clean, `vet` clean across all modules. Browser-validated on staging: both the full detail page and the side pane, on a node with 8 direct observers and on the 433 MHz node with none. No console errors. ## What this does not do `prefixMap.resolveWithContext` still guesses on ambiguous hops, so paths, neighbor edges and analytics keep their current attribution. Making it abstain is a much larger change and needs its own issue. The "Regions" line and Region column on this card read `o.iata`, which this endpoint has never emitted, so both have always been dead. Left as found rather than widened into this change. Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>