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PROJECT ARCHIVE — 6 ENTRIES

Selected systems, experiments and tools.

Three works carried far enough to show in full, and the working archive behind them.

01 / HALF-LIFE

200 mg
08:0023:00

38 mg remaining

An iOS app that models caffeine in the body as first-order decay and reads it against real sleep timing. HealthKit access only ever feeds suggestions — it never silently overwrites a time you set yourself, and raw sleep samples are never synced off the device.

Health ·iOS ·HealthKit ·Kinetics
Open case study
Build
1.0.4 (6) — signed archive exported
Health data
Apple HealthKit
Model
A(t) = A₀ · e^(−λt)
Decay API
Python · live endpoint

02 / FABTWIN

A plasma-etch SPC and fault-detection simulator. The differentiator is not the model — it is validating that model against two real public fab datasets with the correct statistics, including a deliberate reproduction of the common evaluation mistakes as a documented contrast.

SPC ·PCA ·Hotelling T² ·Fault detection
CHAMBER 03UCLLCLFAULT DETECTED
Status
IN PROGRESS
Build
42/42 unit tests — local + CI, ruff/mypy clean
Datasets
SECOM · LAM9600 (public fab data)
View the validation record in Lab

FabTwin lives in the Lab as entry L-03 — it is an experiment under validation, not a shipped project, and its record stays there.

03 / LEOLOGIC OS

LIFEHEALTHPROJECTSCAREERAGENTSMEMORY

A personal operating system for tasks, priorities, and agent workflows, with Obsidian as the knowledge layer beside it rather than duplicated inside it. The split is a documented scope boundary — neither system repeats what the other already does well.

Agent workflows ·Automation ·Personal systems
View the system
Phases shipped
Phase 1–9 + Adventure Mode (A–C)
Client stack
Vite + React + TypeScript + Vitest
Usage evidence
Real daily/ and weekly/ review files