Quality that one careful person can hold in their head doesn't survive a growing team. As headcount rises you must shift from heroics to systems: automation and shared standards that hold the bar without you reviewing every line.
Build quality into the system
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✓ AUTOMATE the boring checks — linting, formatting, type checks in CI
✓ Require TESTS for critical paths; track coverage trends, not vanity numbers
✓ Write down STANDARDS — a style guide, an architecture doc
✓ Make code review the norm, with clear expectations
✓ Use templates/scaffolding so new code starts consistent
✓ Catch issues EARLY — pre-commit hooks, CI gates