# Claude Code: Features, Commands, Architecture and Best Practices

> Source: <https://deepresearch.ninja/2026/05/Claude-Code-Features-Commands-Architecture-and-Best-Practices/>
> Published: 2026-05-22 00:00:00+00:00

This report analyzes Claude Code’s complete feature set, architecture, and best practices for effective usage. Below are the five most actionable conclusions for developers.

**1. Context management is the single most important operational skill.** Claude’s 200K token context window fills rapidly — a fresh session starts with ~30K–45K tokens consumed by system prompts, tool definitions, CLAUDE.md, auto memory, and skill descriptions before any user input. Performance degrades noticeably around 147K tokens of actual usage [14]. The essential techniques are: use sub-agents for all research (they return summaries, not file contents), `/clear`

between unrelated tasks, `/btw`

for quick questions that never enter history, and `/compact`

with focus instructions when approaching the limit. A “kitchen sink” session where multiple unrelated tasks accumulate context degrades performance measurably.