Tool search & slimming for DeepSeek Harness

Key features

• Core tools stay eager — file/shell/essential tools are always directly visible.
• Dynamic injectionsearching, describing, or calling a deferred tool warms it into the session's visible set (LRU-bounded by maxWarmTools), so its full schema is injected into the context for later turns — the model pulls tools into context on demand instead of keeping everything.
• Slimming only rewrites the model-visible surface (system-prompt/assemble)
• Bridge tools — tool_search, tool_describe, tool_call replace the deferred schemas.
• Tiered disclosure — the visible listing shrinks automatically as the catalog grows.