Adds snapcompactCompact() in compaction/snapcompact.ts: instead of an LLM-generated summary, discarded history is printed onto dense 2576px PNG frames with the public-domain X.org 5x8 pixel font and re-attached to the compaction summary message as image blocks. Fully local — no model call; ~7x cheaper than raw text at near-parity recall. CompactionSummaryMessage now charges per attached frame in estimateTokens(), frames persist under preserveData.snapcompact with an 8-frame budget that evicts middle-out (session-head frame pinned so head and tail both survive). Rasterization and PNG encoding run in native code via renderSnapcompactPng().
can1357
8baeb062ec