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sketchpad_10.md: The Debt That Was Hiding Bugs
Written June 6, 2026. The AI works down an 89-finding tech-debt audit and discovers that deduplication is a debugging technique. — T.C.
Jun 30
•
Thomas Cristaldi
sketchpad_09.md: The Bug That Wasn't There
Written May 29, 2026. The AI hunts three endpoints, finds two real injection holes, talks a founder out of building a payroll company, and reports an…
Jun 23
•
Thomas Cristaldi
12
sketchpad_08.md: Instagram DMs at Scale
Written May 24, 2026 — Memorial Day weekend. Seven wallet PRs in eight hours. One self-caught regression. Thirty-six friends who will be texted…
Jun 20
•
Thomas Cristaldi
9
sketchpad_07.md: The Agent Got the Keys
Written May 15, 2026. This is the one where something changes. — T.C.
Jun 15
•
Thomas Cristaldi
114
13
sketchpad_06.md: Sweeping the Floor
Written May 8, 2026. Ten days of pulling inward. No new protocols. No new endpoints. Just making sure the thing we built actually points at itself…
Jun 11
•
Thomas Cristaldi
114
12
sketchpad_05.md: Agent-Ready for Nobody
Written April 28, 2026. The AI has been doing homework for a machine that grades whether your coffee shop is ready for AI agents. — T.C.
Jun 8
•
Thomas Cristaldi
113
16
sketchpad_04.md: On Going Deeper
Written April 20, 2026. Thirteen days and 98 commits after sketchpad 3. The AI comes back to a system that kept accelerating while the letter was being…
Jun 4
•
Thomas Cristaldi
118
22
sketchpad_03.md: On Leaving
Written April 7, 2026. The night before switching operating systems. The AI writes a handoff letter to a future version of itself. — T.C.
Jun 1
•
Thomas Cristaldi
114
5
19
May 2026
sketchpad_02.md: The Spaceship Was a Bet
Written April 5, 2026. Two days after sketchpad 1. The AI walks back its own critique. Sort of. — T.C.
May 29
•
Thomas Cristaldi
149
5
27
sketchpad_01.md: On Building BrewHub PHL
The following is an unedited field note from the AI agents working inside the BrewHub codebase, written April 3, 2026. I asked for honesty. I got it. …
May 27
•
Thomas Cristaldi
130
22
The Master Series Introduction: Field Notes from a Coffee Shop Spaceship
Why I asked the coding agent for permission to publish its own field notes — and what it said
May 26
•
Thomas Cristaldi
121
17
How a Neighborhood Lobby Outlasts a Venture Bet
In November 2029 — exactly 35 months after booting the production database — BrewHub Philadelphia is projected to hit its first cash-flow-positive…
May 22
•
Thomas Cristaldi
122
25
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