context-pruning 2

Deterministic context-pruning compaction backend for dsh (DeepSeek Harness) — zero-LLM summaries, /dcp command, works out of the box. Design references Opencode-DCP/opencode-dynamic-context-pruning.

Zero-loss tool-result pruning for the DeepSeek Harness (DSH): oversized tool results are spilled to a file first, then pruned with exact elided-span offsets and a recovery locator. A dsh-plugin.