Why SDD fails without harness engineering

blog@haddouti.com (Hafid Haddouti) — Sun, 17 May 2026 00:00:00 +0000

You adopted spec-driven development. You write specs now, you’re careful, you also review them. You generate code from specs. You stopped doing “only” vibe coding.

It works better than before. But it’s still not… right.

Then you realize: you’re doing SDD without harness engineering. Specs aren’t enough. You need enforcement.

Vibe coding is dead (but your org still does it)

blog@haddouti.com (Hafid Haddouti) — Sun, 03 May 2026 00:00:00 +0000

Vibe coding is what happens when you treat AI as a code typewriter instead of a partner.

You skip the specs. Skip the design thinking. Skip telling the AI what your architecture actually is. Then you’re shocked when:

Hallucinations stack — The AI guessed once. Now that guess is “the pattern.”
Knowledge vanishes — Nobody wrote down why. Good luck when the person who prompted it moves on.
Quality has no guardrails — You’ll find the bugs after deployment, not before.

Sdlc on My Information Centre

Why SDD fails without harness engineering

Vibe coding is dead (but your org still does it)