ahk02x / field notes
Projects

A peek at each

Not the whole thing. What each one is for, what it taught me, and where it stands. Infrastructure details stay home.

The SQ5 garage

A 2025 Audi SQ5, logged five times a second through a reverse-engineered cable and a Pi in the footwell. Build log, lessons, and a weekly health card the car writes about itself.

liveOpen →

Alert board

A board built by cron, four hook rungs, an acknowledgement ledger with five verdict words, and a headless responder for the hours nobody is typing.

writtenRead →

PHOSPHOR wall

A portrait screen on the wall that is the alarm surface for everything else. It latches red until a human clears it, on purpose, and reads from the hallway.

write-up coming

Memory as infrastructure

The agent's memory is a directory of one-fact files with a linter, an index whose lines are triggers rather than summaries, nightly verification against the machines, and git for history.

write-up coming

fleet-patch

A fortnightly patch cycle for a small Proxmox fleet, graded on evidence of what actually updated rather than on the schedule having run.

write-up coming

partswatch

Watches classifieds every fifteen minutes and fifty-odd store prices hourly for a wanted-parts list, and sends one message when something moves. The part matters, not the store.

write-up coming

lanwatch

Internal traffic versus traffic that leaves the house, as two different facts, because a home network full of IoT devices should have to explain itself.

write-up coming

jackal-protocol-re

Reverse-engineering a proprietary automotive diagnostic cable: USB capture, frame recovery, checksums across 285,832 frames, and the signed-channel bug that made a million readings silently wrong.

public repoGitHub →

Crucix

A personal intelligence agent that watches several data sources and pings when something changes. A fork I run and extend.

public repoGitHub →

meanwhile

Horizontal matrix rain where live news and true facts decode out of the code. Zero dependencies, one file.

public repoGitHub →

Built with Claude Code

Claude Code has been part of the work behind these projects. Usage recorded in its transcripts since 2026-07, deduplicated:

Tokens
7.74billion
Sessions
2,061
Replies
48,887
Cache reads
7.43billion
fresh input 280 M · output 37 M
SQ5 garage
1.73 B
SQ platform
0.96 B
IoT
0.82 B
flowtrace
0.49 B
PHOSPHOR wall
0.32 B
Crucix
0.26 B
Alert board
0.25 B
macwatch
0.17 B
netdash
0.16 B
Inbox hub
0.13 B
Private projects
2.46 B

Counted by tools/tokens.py. Streamed messages are deduplicated; a session's tokens are split evenly across the project folders it touched. Private projects are summed, never named. Totals include cache reads; these are usage counters, not unique generated words or a cost estimate.