28 Jul 2026
Signal Headquarters

Field Notes · 28 Jul 2026

Best explained

Partners Capital avoided emerging managers early on to limit business risk, but a growing capital base forced them to develop that capability because incumbent managers hit capacity constraints.

By the numbers

Series A fundraising windows for top companies at the $3-10M ARR range have compressed from roughly 12-18 months to as little as one week, with some deals closing in a single day.

New today — Evidence added

Poolside reported zero meaningful on-call wake-up events for engineers across the entire year, signaling exceptional training pipeline reliability.

Eiso Kant

Partners Capital avoided emerging managers early on to limit business risk, but a growing capital base forced them to develop that capability because incumbent managers hit capacity constraints.

Michelle Knudsen

New today — Sharp calls

Lenny Rachitsky on the new core artifact of AI product management at Anthropic.

Lenny Rachitsky

Removing repeated instructions from GPT-5.6 Soul prompts raised benchmark scores by 10-15% and cut token usage by up to 66%, per OpenAI's own findings.

Nathaniel Whittemore

Boris Cherny on Opus 5 running indefinitely without stopping.

Boris Cherny

New today — Useful context

Local AI meetups generate clients only after three to six events, not immediately.

Corey Gannon

Tool watch

Codex (OpenAI) is highlighted as a leading agentic coding product with no current equivalent from Google, making it a key differentiator in the frontier AI race.

Worth quoting

“If I had a death wish, I would have just gone and done it. I would have spent nine years training for it.”
Alex Honnold
“Consensus 2027 EPS change for AI infrastructure stocks. Insane. 42%.”
Michael Zezas
“If you live in a state where there is an arbitrary power who can have you put to death, you are a slave.”
Ada Palmer
“We've not been able to discover a single psychiatric condition in which sleep is normal.”
Matt Walker
“Walt's line on this was that ABC needed the show so badly that they bought the amusement park with it.”
Ben Gilbert
“Cocoa is to cocaine what potatoes are to vodka.”
Andrew Weil