Day with AI: PRD for an Autonomous System, Broken Python Fix, and the Client Got an Implementation Plan.

What I worked on

Wednesday. One of those days where you don't write a single line of production code but you're busy all day. Six sessions, lots of documents, a few fixes, and one legacy project from the past.

What I did

PRD for autonomous Work-OS

Biggest task of the day. Wrote a complete product requirements document for making my personal operating system do things on its own — without being told what to do. Went through the entire current state, identified what's already automated and what isn't, and designed the target state. A meta-task: writing a document about how the system should govern itself.

Process analysis for a client — implementation plan

Client needed a concrete plan added to their existing analysis: what, when, and how much. Phased the implementation across 3-4 months so it wouldn't be a one-time financial hit. Each phase builds on the previous one and is independently functional — after phase one, the company is already using the system.

9 processes, from document processing through inventory to financial reporting. All in language a non-technical person can understand.

Dev tools fix — Python and observability

Langfuse hook for tracking AI sessions stopped working. Root cause: Python 3.14 broke Pydantic V1. Fix: recreate virtual environment with a compatible version. Classic — half the work with AI is fixing infrastructure around AI.

Cold email pipeline

Morning automated pipeline run. Scraping, data enrichment, draft generation. Runs in the background, I just check the results.

Design skills consolidation

Merged several UX/UI tools into a single file. System maintenance — nothing sexy, but necessary.

Legacy Vue project

An older project I manage. Vue app that needs to go as a static build to FTP. Found only net2ftp (a web FTP client) on the server, no production code. So a detective story — figuring out what's actually running there and how to deploy it.

Time: AI vs without AI

Task	Without AI	With AI

PRD for autonomous system	2-3 days	~3h
Implementation plan (9 processes, phases)	1-2 days	~2h
Python/Langfuse fix	2-3h	~20min
Cold email pipeline (automated run)	—	~10min check
Design skills consolidation	2-3h	~30min
Legacy Vue project analysis	1-2h	~30min
Total	~25 hours	~6.5h

What I learned

• Writing a PRD for your own system is surreally meta — you're writing a document about how the system should write documents itself
• Python 3.14 breaks a lot of things — Pydantic V1 doesn't work, and Langfuse depends on it. Stick with 3.13
• Implementation plans for clients need to be phased — nobody wants to hear "160 hours upfront"
• Legacy projects without documentation are detective stories — but with AI, at least faster detective stories