blog: How We Made Retain's Peak Memory Flat, from 4 MB to 90 MB Documents

[benfrank241]

Engineering deep-dive on the 0.9.2 retain memory-budget rebuild.

• Post: hindsight-docs/blog/2026-08-27-retain-memory-budget.md (slug /blog/2026/08/27/retain-memory-budget)
• Cover: navy before/after 'peak memory flat' chart (real tracemalloc numbers)
• ~2,000 words, content score 85.5/100, SERP-length meta description
• All numbers verified against commit bodies (e65973b1d, 634312795): 384.7→9.6 MB sizing, 200.8→0 MB chunking, 204.4→25.6 MB split.
• Release-gated: RETAIN_MEMORY_BUDGET_MB, RETAIN_CHUNK_BATCH_SIZE, and all three rebuild commits confirmed in the v0.9.2 tag (not just main).
• Corrected the 0.9.2 release blog's imprecise 'drops langchain from the install' — the post states the accurate version (left the runtime path; kept as the differential-test reference).

🤖 Generated with Claude Code

[strix-security]

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