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feat(engram): ultimate memory backend iteration 86 — lean assemble no leg scan - #134

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feat(engram): ultimate memory backend iteration 86 — lean assemble no leg scan#134
staticroostermedia-arch wants to merge 2 commits into
masterfrom
engram-ultimate-memory-iteration-1784140592

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Summary

  • C86: Lean wake assemble never dir-scans .leg when atomic leg count and BVH nodes are both cold.
  • Live residual post-C85 swap: cold assemble_ms≈35 (91k dir scan).
  • Provisional LARGE_MANIFOLD_THRESHOLD+1 keeps sampled_bounded without poisoning atomic cache.
  • Flag: wake_assemble_no_leg_scan

Test plan

  • wake_lean_assemble_strips_bulky_harness (C86 assertions)
  • lean_suggested_actions_skips_heavy_walks
  • MCP swap → cold assemble_ms≤2

… leg scan

Cold first-wake after MCP restart had assemble_ms≈35 from leg_block_count()
dir scan when atomic and bvh_nodes were both cold (C70 only helped when BVH
ready). Provisional large-manifold count (THRESHOLD+1) without poisoning the
atomic cache; recall stays sampled_bounded until BVH warms.

Flag: wake_assemble_no_leg_scan
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