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What it’s for: Spec an AI feature before you build it: a PRD template, an eval plan, a failure taxonomy and a cost model with per-request ceilings.
PRD Template for AI Features, with Eval Plan and Cost Model
Contents
24 pages, Notion and DOCX, plus an XLSX cost model
Earlier versions sell at their own price.
PRD Template for AI Features, with Eval Plan and Cost Model
v2.0 · Use license
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Ask @june.writes anything about this work. Answers are public.
Pat O. · 9d
Will future editions be a free update?
Awaiting an answer from @june.writes
1,400 trajectories, nine harnesses, one uncomfortable finding: task success hides most failures.
Research · Project
We ran 1,400 agent trajectories across nine public harnesses and found that task success alone hides most failures. This report proposes a four-layer rubric.
What it’s for: Help a team choose how to evaluate its agents, with methods compared on real tasks.
Digest Desk compiles this on the first of every month and sends it to review. This time it also ran all six September releases on the same 900 tasks, so the cost table is ours.
Research · Piece
Six releases in one month, each run on the same 900 tasks (support triage, SQL generation and long-document summary), with cost per 1,000 tasks next to accuracy.
What it’s for: Compare September’s six model releases on price, context and our own runs of the same three workloads, then pick one for your feature in twenty minutes.
The 2026.2 edition updates the vendor BAA table and adds a chapter on prompt logs.
Guide · Project
Which vendors sign a BAA, where PHI leaks in prompt logs, and the eleven controls auditors ask about first. Written with two compliance officers.
What it’s for: A practical guide for US health-tech teams whose AI features have to pass a HIPAA audit.
v1.0 builds on the Agentic Commerce Protocol instead of competing with it: allow-lists, consent tokens and disputes, plus a reference server and a conformance suite.
Spec · Module
Maps each protocol endpoint to the controls a store still has to build, then ships them: an OpenAPI file, a TypeScript reference server and a conformance suite you run against your own implementation.
What it’s for: Implement agent checkout on top of the open Agentic Commerce Protocol, with the parts it leaves to you: spending caps, consent tokens, agent allow-lists and dispute flows.
v2.0 is out. Rebuilt the forecasting views with Claude Opus 5.5 and then spent a week on the empty states nobody screenshots.
Project kit · Project
What it’s for: Launch a polished SaaS billing dashboard in an afternoon instead of a sprint.
Fourteen pages, two languages, light and dark, and a Lighthouse score of 95 or better on every one. Northwind is the marketing site I kept rebuilding for clients, finished once.
Page or landing · Project
What it’s for: A finished marketing site for a SaaS product: fourteen pages in English and Spanish, light and dark, ready to rename and deploy.
Driftline 1.1: six tracks, a track editor and touch controls. Put your logo, colors and sponsor boards in one config file and the whole game reskins.
Most startup ledgers I have audited were a balance column and good intentions. Tally is the boring version: double-entry journals, idempotent writes and 420 tests that prove every journal balances.
Backend or API · System
What it’s for: A small, correct ledger service for apps that move money: double-entry journals, idempotent writes and balances you can trust at any point in time.