Zero-to-One Product Squad
Zero-to-One Product Squad
A solo build by David Shawcross

You bring the judgement. The squad brings the speed.

The Zero-to-One Product Squad is a specialised multi-agent AI system that takes your data product idea from brief to a functional vertical slice, fast and cheap: under an hour, for a few dollars in model spend. You inject requirements and taste, while the agents do the heavy lifting, and show their work.

Discourse dashboard screen showing a relevance versus hype scatter plot, with the underrated quadrant highlighted as the most useful signal
Discourse: a vertical slice insights dashboard prototype, built by the squad. Try the interactive demo here.
Verified in the field

One real run, start to finish

Every number below comes from the actual Langfuse trace for this pipeline run, not a projection.

pipeline-run-20260917-125106 View the full trace ↗
MVP run, brief to signed-off functional prototype v1
$6.38cost
43magent compute
1h 01mwall clock, real-life conditions
Full pipeline, incl. design review and pre-flight checks
$9.99*cost
1h 09magent compute
1h 27mwall clock, real-life conditions
62%cheaper, via prompt caching

8.9M tokens processed for just $9.99. The system's aggressive prompt caching architecture helped avoid $26.07 in standard input rates, saving 62% ($16.08) on costs.

AgentCostTurns
Analyst$1.014
Builder, build$4.064
Builder, revision (3 rounds)$1.3113
Critic, hygiene (2 rounds)$1.154
Polisher, engineer (2 rounds)$1.9232
Gatekeeper, security$0.531
Total$9.9958

* seriously - the exact cost was 9.9879336

Meet the Squad

One IC. Five Agents. Full-Squad Velocity.

Intent-driven orchestration
Evaluator-optimiser loop, capped at 2 rounds
Automated gate before every publish
Sprint to v1 (human-in-the-loop) Polish & Compliance (automated) v1 You Analyst Builder Critic Polisher Gatekeeper
v1 You Analyst Builder Critic Polisher Gatekeeper

    Judgement, not just automation

    The brief says what. The squad decides how.

    Eight real moments where the agents exercised autonomous taste and technical discernment during the build.

    Caught a potential leak before publish Verified fixes independently, not self-reported Grounded hype scores in real data Resolved entities through judgement alone Ran open-ended narrative analysis Decided which findings earned a module Built every layout from intent alone Designed new interactions beyond the brief
    More of what shipped

    Three more views from the same live demo.

    Discourse overview screen listing key takeaways and narratives with relevance and hype scores
    Overview
    Discourse network graph screen showing how themes and entities in the conversation connect
    How it all connects
    Discourse frameworks worth stealing screen showing concrete heuristics pulled from the conversation
    Frameworks worth stealing
    The thesis

    Why build a squad?

    I'm David Shawcross. Most of my work is zero-to-one product: taking bets from concept to reality alongside small, resource-strapped cross-functional teams. The Zero-to-One Product Squad is my attempt to run that same motion with agents standing in for the team, proving the thesis that a network of specialised agents can handle the end-to-end execution of a full product innovation squad, and massively speed up an IC in the process.

    If you want to see the code, talk about how this applies to your team, or tell me what's broken, I'd like to hear it.