dsh-compaction-cacheaware

Reasonix-style cache-aware compaction backend for DeepSeek Harness (DSH).

This is a standalone, modular DSH plugin. It implements the official @deepseek-ai/dsh-compaction seam (ctx.compaction) and is designed to be mounted instead of @deepseek-ai/dsh-compaction-basic inside a preset's compaction realm. It does not modify other plugins, presets, or host files.

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Docs

• PROJECT.md — 项目说明与维护入口
• MAINTENANCE.md — 维护手册
• MIGRATION_BRIEF.md — 迁移交接说明
• reasonix_compact_design.md — Reasonix 原始设计

What it ports from Reasonix

• One automatic trigger: compact_ratio (default 0.85), not multiple soft/snip/force thresholds.
• One structured checkpoint: stable prefix + one summary + recent tail.
• Recent tail budget: clamp(window×10%, 32K, 96K).
• Checkpoint acceptance: normal candidates ≤ 50% of window and below the trigger; exceptional fixed-prefix path requires ≥25% savings.
• Canonical transcript preserved: DSH's surface replace shadows the old range in the model-visible projection only; the raw session log remains the source of truth.
• One summarizer call per transaction: no application-layer retry loops.
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