35 lines
1.6 KiB
Markdown
35 lines
1.6 KiB
Markdown
---
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summary: memsearch's SessionStart "Recent Memory" injection size is hardcoded in its hook script — no config knob controls it, and the documented TOML surface doesn't cover it.
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tags:
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- type/reference
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- tool/memsearch
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scope: global
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type: reference
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source: cc-os docs/plans/b3-memsearch-injection-review.md
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date: 2026-07-08
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last_updated: 2026-07-08
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---
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# memsearch SessionStart injection is hardcoded (no cap knob)
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Verified on memsearch v0.4.6 and the v0.4.11 plugin cache (2026-07-08).
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- The SessionStart `# Recent Memory` injection is produced by `hooks/session-start.sh`,
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which hardcodes `head -2` daily memory files × `head -40` heading/bullet lines each.
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- **No user-facing config knob controls this.** The documented TOML surface (the
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`memory-config` skill: summarize / project_review / user_profile / memory_to_skill /
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prompts) does not touch the injection size — don't waste time looking for a cap there.
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- Measured cost across 61 real sessions (cc-os, 7 days): min ~6.0 KB / median ~11.7 KB /
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max ~15.4 KB per session (~1.5k–3.9k tokens), injected every SessionStart.
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## Levers (in order of durability)
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1. Upstream fix: a memsearch config option for injection size (doesn't exist yet; would be
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the only durable cap).
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2. Reduce bullet density at the source via the Stop-hook summarizer prompts/config — fewer,
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denser bullets in the daily files shrink what `head -40` captures.
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3. Unsupported stopgap: hand-edit the cached hook's `head -2`/`head -40` constants
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(~75% reduction) — **any plugin cache refresh silently reverts it**.
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Related: [[cc-os-hub]]
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