What Is Claude Code? The 2026 Guide for Founders and Senior Devs
Claude Code in 2026: a development agent that lives in your terminal, reads your entire codebase, writes, tests, commits, and opens PRs. Sonnet 4.6 / Opus 4.7 models, from $17/month. A complete guide with install, CLAUDE.md, Plan Mode, sub-agents, MCP, and a Cursor / Copilot / Codex comparison.