In January 2026, TVN Bridge had 5 core modules and 97 tests. By March, it had 51 core modules and 1,494 tests. The codebase grew 9x. Over 121 AI agent sessions contributed to it.

Not one of them broke a founding architectural rule.

How?

We ran a drift audit — comparing the current codebase against 6 backup snapshots spanning the full project history. Every original module still exists with its original public API intact. The core/presentation split established on Day 1 has zero violations after 10 weeks of development. The DEFAULT_IGNORES list (52 file patterns) is byte-for-byte identical to v0.9.0.

This wasn’t luck. It was constraints.

Truth nodes encode the architecture rules. The constraint engine enforces them on every edit. The context gate forces every agent to read those rules before touching code. The memory system preserves why decisions were made so the next agent doesn’t unknowingly undo them.

What We Found

The drift audit found one real loss: about 40 agent lineage entries were accidentally deleted during a schema migration. We documented it, fixed the bug, and reconstituted what we could from backup archives. Even our failures are tracked.

The Difference

That’s the difference between “AI-assisted development” and “governed AI-assisted development.” One hopes the AI does the right thing. The other makes sure.