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AI Coding Tools Need Better Boundaries, Not Better Prompts

One thing becoming increasingly obvious with AI-assisted development:

LLMs are great at generating code.
They’re not great at making architectural decisions.

A lot of teams are discovering the same pattern:

  • rapid prototyping feels amazing,
  • shipping gets faster,
  • but long-term maintainability starts degrading quietly in the background.

The problem usually isn’t the generated code itself.

It’s the lack of:

  • clear contracts,
  • deterministic workflows,
  • validation layers,
  • and shared engineering conventions before generation even starts.

Without those boundaries, AI tends to optimize for local correctness instead of system consistency.

That’s why workflows like Spec-Driven Development (SDD) are becoming more relevant as teams integrate AI deeper into production environments.

Instead of relying on increasingly complex prompts, SDD focuses on:

  • defining contracts first,
  • validating specs before implementation,
  • constraining generation scope,
  • and treating LLMs more like implementation engines than autonomous architects.

In practice, this tends to produce:

  • more predictable outputs,
  • cleaner collaboration between engineers,
  • and codebases that are actually maintainable months later.

We’ve been exploring this topic internally and recently put together a breakdown of how Spec-Driven Development can help create more reliable AI-assisted workflows in real-world engineering environments.

If the topic sounds interesting, here’s the discussion:

Stop "Vibe Coding" and Start Spec-Driven Development | Part 1

Curious how other teams here are approaching this shift:

  • Are you introducing stricter boundaries around AI-generated code?
  • Have specs become more important in your workflow?
  • Or are you still experimenting with prompting strategies first?

Feels like the industry is slowly moving from: “AI can generate code”

to: “How do we engineer systems around probabilistic generators?”

And that’s a much more interesting problem...

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