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The #850 liveness watchdog was killing valid `codegraph init`/`index` runs at "Resolving refs 0-2%" on large collision-heavy repos (18-25K-file Java monorepos on slower hardware). #1105's cooperative yielding assumed a 500-ref sub-chunk is always cheap, but per-ref cost is unbounded: a colliding method name (`execute`, `process`, ...) whose candidate set misses the 5,000-entry name LRU re-fetches every same-named row (unbounded SELECT + materialization, measured 8.8ms at just 4K collisions on an M4 — linear in collision count), and receiver-type inference re-split the whole source file per ref (~20% of total index CPU). A dense pocket multiplied that past the 60s window and the heartbeat starved. Three guards, no behavior change: - resolveBatchYielding checkpoints after EVERY ref (maybeYield is a ~ns time check when under budget), so a slow pocket can never run more than one ref past the yield budget. - resolveMethodOnType's ref-independent candidate filter is memoized per (language, Type::method) on the resolver context; per-ref disambiguation (import FQN #314, call-site file #1079) stays outside the memo. - Receiver inference reads lines through a per-file LRU (shared and C++ inferrers), and skips generated/minified lines >10K chars instead of regex-scanning them per ref. Measured on a 4,028-file synthetic Java bank repo (392K refs): mid-loop max event-loop stall 1528ms -> 546ms under cache thrash, total init 250.9s -> 96.8s at default config. Co-authored-by: Claude Fable 5 <noreply@anthropic.com>