Most engineers install Claude Code, prompt it like a chatbot, and wonder why it's inconsistent. The answer isn't a better prompt — it's infrastructure.<br/><br/>The real gains come from three things: a <code>CLAUDE.md</code> that actually enforces your standards, a fleet of parallel agents in git worktrees instead of one babysit session, and hooks plus sub-agents that handle the tedious parts automatically.<br/><br/>The 2025–2026 story is that Claude Code became a <strong>platform</strong>: 8-event hooks, the renamed Claude Agent SDK, <code>claude-code-action</code> for GitHub, and <code>--dangerously-skip-permissions</code> — great when sandboxed, genuinely dangerous when not. Yes, people have deleted their <code>.git</code> folders with it.<br/><br/>Highest-ROI moves for senior engineers, in order: (1) a real <code>CLAUDE.md</code> with DO-NOT rules, (2) a <code>.claude/commands/</code> stdlib, (3) PostToolUse formatter + Stop test hooks, (4) code-reviewer and security-auditor sub-agents, (5) 3–8 parallel agents on worktrees.