Claude Code /skill-doctor trims context window noise

As agentic coding tools amass dozens of specialized skills and MCP tools, context hygiene is becoming the newest developer optimization discipline because system prompt bloat degrades LLM reasoning far faster than token costs drain budgets. Unnecessary skill schemas in the prompt introduce semantic noise that can misroute function calls and increase hallucination risks. Current agentic CLIs still rely on static prompt injection rather than dynamic just-in-time skill discovery, making manual audit tools a temporary necessity. Tooling like /skill-doctor signals a shift toward treating agent configurations and skills with the same rigorous lifecycle management as package dependencies, while keeping the active context lean preserves critical window space for long-horizon coding tasks, test runs, and deep debugging loops.