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Podcast: Fragmented - Android Developer Podcast
Episode:

307 - Harness Engineering - the hard part of AI coding
Category: Technology
Duration: 00:29:55
Publish Date: 2026-03-17 07:22:16
Description:

The hard part of AI coding isn't generating code — it's controlling quality, safety, and drift. Kaushik and Iury break down harness engineering: the five pillars for shaping an agent's environment and what it looks like when teams build custom harnesses from scratch.

Full shownotes at fragmentedpodcast.com.

Show Notes

Why it matters

  • Harness Engineering -
    OpenAI's post on building their Codex codebase (~1M lines of code, 1,500 PRs
    merged, zero manually written)

Shaping the harness

  1. Agent legibility
  2. Closed feedback loops
  3. Persistent memory
  4. Entropy control
  5. Blast radius controls

Building the harness

Other resources

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Co-hosts:

[!fyi] We transitioned from Android development to AI starting with
Ep. #300. Listen to that episode for the full story behind
our new direction.
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