feat: add eviction policy engine (LFU + prefix-aware)#13
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…s CLI Add two new eviction policy implementations to the oracle engine: - LFU (Least Frequently Used): evicts blocks with lowest access frequency, ties broken by earliest insertion order - Prefix-Aware: never evicts parent blocks while their children are resident, among leaf nodes evicts by LFU Add compare-policies CLI command that runs all 4 policies (Belady, LRU, LFU, prefix-aware) on a trace and outputs a JSON comparison. Add eviction policy selector dropdown to the web calculator with POLICY_EFFICIENCY_DEFAULTS (lru: 0.55, lfu: 0.62, prefix_aware: 0.78) that updates the lru_like efficiency parameter unless manually overridden. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Summary
oracle/lfu.py)oracle/prefix_aware.py) — never evicts parent blocks while children are residentcompare-policiesCLI command to benchmark all 4 policies (Belady/LRU/LFU/prefix-aware) on a tracePOLICY_EFFICIENCY_DEFAULTSTest plan
pytest tests/test_lfu.py tests/test_prefix_aware.py -vnode tests/validate_js_parity.mjs(178 checks pass)🤖 Generated with Claude Code