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meshcore-analyzer/cmd/server
Kpa-clawbot 54f7f9d35b feat: path-prefix candidate inspector with map view (#944) (#945)
## feat: path-prefix candidate inspector with map view (#944)

Implements the locked spec from #944: a beam-search-based path prefix
inspector that enumerates candidate full-pubkey paths from short hex
prefixes and scores them.

### Server (`cmd/server/path_inspect.go`)

- **`POST /api/paths/inspect`** — accepts 1-64 hex prefixes (1-3 bytes,
uniform length per request)
- Beam search (width 20) over cached `prefixMap` + `NeighborGraph`
- Per-hop scoring: edge weight (35%), GPS plausibility (20%), recency
(15%), prefix selectivity (30%)
- Geometric mean aggregation with 0.05 floor per hop
- Speculative threshold: score < 0.7
- Score cache: 30s TTL, keyed by (prefixes, observer, window)
- Cold-start: synchronous NeighborGraph rebuild with 2s hard timeout →
503 `{retry:true}`
- Body limit: 4096 bytes via `http.MaxBytesReader`
- Zero SQL queries in handler hot path
- Request validation: rejects empty, odd-length, >3 bytes, mixed
lengths, >64 hops

### Frontend (`public/path-inspector.js`)

- New page under Tools route with input field (comma/space separated hex
prefixes)
- Client-side validation with error feedback
- Results table: rank, score (color-coded speculative), path names,
per-hop evidence (collapsed)
- "Show on Map" button calls `drawPacketRoute` (one path at a time,
clears prior)
- Deep link: `#/tools/path-inspector?prefixes=2c,a1,f4`

### Nav reorganization

- `Traces` nav item renamed to `Tools`
- Backward-compat: `#/traces/<hash>` redirects to `#/tools/trace/<hash>`
- Tools sub-routing dispatches to traces or path-inspector

### Store changes

- Added `LastSeen time.Time` to `nodeInfo` struct, populated from
`nodes.last_seen`
- Added `inspectMu` + `inspectCache` fields to `PacketStore`

### Tests

- **Go unit tests** (`path_inspect_test.go`): scoreHop components, beam
width cap, speculative flag, all validation error cases, valid request
integration
- **Frontend tests** (`test-path-inspector.js`): parse
comma/space/mixed, validation (empty, odd, >3 bytes, mixed lengths,
invalid hex, valid)
- Anti-tautology gate verified: removing beam pruning fails width test;
removing validation fails reject tests

### CSS

- `--path-inspector-speculative` variable in both themes (amber, WCAG AA
on both dark/light backgrounds)
- All colors via CSS variables (no hardcoded hex in production code)

Closes #944

---------

Co-authored-by: you <you@example.com>
2026-04-30 23:28:16 -07:00
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