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Kpa-clawbot
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## Fix topology analytics double-counting repeaters/pairs (#909) ### Problem `computeAnalyticsTopology()` aggregates by raw hop hex string. When firmware emits variable-length path hashes (1-3 bytes per hop), the same physical node appears multiple times with different prefix lengths (e.g. `"07"`, `"0735bc"`, `"0735bc6d"` all referring to the same node). This inflates repeater counts and creates duplicate pair entries. ### Solution Added a confidence-gated dedup pass after frequency counting: 1. **For each hop prefix**, check if it resolves unambiguously (exactly 1 candidate in the prefix map) 2. **Unambiguous prefixes** → group by resolved pubkey, sum counts, keep longest prefix as display identifier 3. **Ambiguous prefixes** (multiple candidates for that prefix) → left as separate entries (conservative) 4. **Same treatment for pairs**: canonicalize by sorted pubkey pair ### Addressing @efiten's collision concern At scale (~2000+ repeaters), 1-byte prefixes (256 buckets) WILL collide. This fix explicitly checks the prefix map candidate count. Ambiguous prefixes (where `len(pm.m[hop]) > 1`) are never merged — they remain as separate entries. Only prefixes with a single matching node are eligible for dedup. ### TDD - **Red commit**: `4dbf9c0` — added 3 failing tests - **Green commit**: `d6cae9a` — implemented dedup, all tests pass ### Tests added - `TestTopologyDedup_RepeatersMergeByPubkey` — verifies entries with different prefix lengths for same node merge to single entry with summed count - `TestTopologyDedup_AmbiguousPrefixNotMerged` — verifies colliding short prefix stays separate from unambiguous longer prefix - `TestTopologyDedup_PairsMergeByPubkey` — verifies pair entries merge by resolved pubkey pair Fixes #909 --------- Co-authored-by: you <you@example.com>