sean acres
San Francisco

AI product leader who builds

Agent harnesses, generative pipelines, and the evals that decide whether the behavior is good enough to ship.

Founding PM to VP of Product across seven 0-to-1 launches, including a trivia game that reached #1 on iOS. Owned P&L at three companies; hired and led product, design, and growth orgs across the US and India, from seed to Series B.

Currently Senior Product Manager at Weekend, an AI voice and entertainment company, where I am product lead for Foundry, the AI agent harness every game the studio now ships is built on. I own its roadmap and I build on it, setting the direction, the standards, and the evals the agents work against. Voice AI since 2017.

Subscribers on the franchise a shipped title belongs to
180M
Moonbug's flagship IP. A planned 2D overlay became a 3D game; five company firsts in ten months.
Monthly actives on a streaming product I ran
3.6M
Series B. Hired and led three PMs and designers across twenty-plus engineers.
Live candidates held open, on a six-hour sweep
500+
Raretta, in production. Cadence measured on the running service at 21,605s against a configured 21,600.
Location inference, raw against rewritten
83% → 3%
n=100 paired, 95% CI 35.6–44.5. Measured against a stand-in, not the shipping model.
Cheaper per image, at a higher quality score
12×
$0.03 scoring 85 against $0.36 scoring 80, and only after post-processing. Both scores are the judge's, and the judge does not predict what ships.
Downloads on a live trivia game, as founding PM
1M+
Number one in Trivia on iOS. It started in 2017 as a voice prototype and pivoted; the ranking is the category one, not the store's.

Built on my own time

Four products, built since mid-2025. One is live, one is a waitlist, two are private repos, and the page says which is which.

Autonomous car-buying agent

Raretta

Name a car and a ceiling. It hunts dealer inventory around the clock and opens the negotiation by email, inside limits you set.

  • Sweeps manufacturer and used-car inventory APIs on a six-hour cycle in production, holding hundreds of live candidates open at once
  • Scores every listing on what it would cost delivered, not the sticker
  • Blocks its own outbound email whenever the model invents a price, sending nothing rather than something generic
raretta.com · signup closed by construction
Live
Local AI for iPhone, private by construction

Tellspike

Ask it anything without the question leaving your phone. When it does reach the cloud, it sends an anonymized rewrite.

  • Every cloud message carries a receipt showing the exact anonymized text that left the device. Local turns render nothing
  • The free tier's silence is enforced by a test that fails the suite on any outbound request, analytics included
  • Privacy priced as the product: free on the device, metered in the cloud
tellspike.com · app in development, not released
Pre-launch
AI asset generator for app and game developers

Tosskeep

Describe an asset and get output the target can use, engine or asset catalog, with an AI quality gate deciding what is good enough to keep.

  • Meta-evaluation grades the judges themselves against blind human verdicts. Pooled across three runs, n=111, no judge beat approving everything
  • Post-processing lifts a $0.03 model 28 points while degrading a $0.06 purpose-trained one, which reverses which model to buy
  • A bake-off harness scores 39 active models across four providers on cost and quality, returning a menu rather than a single winner
source kept private · landing page built, not deployed
Private
AI character SDK

animachord

Characters remember you, decide whether they trust you, and gossip about each other behind your back.

  • Grounded in published psychology: Big Five, attachment theory, Tulving's memory taxonomy, Gottman ratios, Ebbinghaus decay
  • The relationship engine is LLM-free: 70 boundary tests hold trust arcs deterministic, and recovery needs a five-interaction streak
  • Reimplemented in Swift rather than bound to, with CI failing the build if the two runtimes diverge on disk
source kept private · gated demo planned
Private