Jev & System One
Decision models that judge my Home Assistant automations and route each prompt to the right LLM.
7 posts Sep 23, 2026 → Oct 26, 2026 Repository
- 1
· 20 minread
system-one-router: Letting a "System One" Model Pick the Right LLM for Every Prompt
My first model router let an LLM read a prompt file and pick an agent. This one asks a "System One" decision model four typed questions, scores the models with plain arithmetic, and publishes a benchmark to prove it works (and to show where …
- 2
· 23 minread
Jev in Home Assistant: Letting a Decision Model Make the Judgement Calls
My automations are good at thresholds and bad at context. Jev answers typed questions with a calibrated probability, for about two thousandths of a cent each. Here is how I wired it into Home Assistant with the old rules kept as a safety …
- 3
· 11 minread
Jev in Home Assistant, Take Two: History, Feedback, and Why I Didn't Go Local
The fix for "Jev has no memory" was never a different model. It was giving Jev a memory. Here is the history script, the feedback loop, and what the live scoreboard already disagrees about.
- 4
· 21 minread
Laya vs Jev, Ten Days Later: New Rivals, a Fine-Tune on My MacBook, and a Reality Check in Home Assistant
Laya says "fine-tune me", so I did, on a 16 GB MacBook. Here is the recipe, how long it takes, what it changes on the 80-prompt benchmark, and why my house still runs on Jev.
- 5
· 11 minread
Clef-flash vs Jev: Cloudflare's Open Decision Model on a 16 GB MacBook
Three days after Cloudflare's announcement, Clef-flash went through the same 80-prompt benchmark as Jev, Laya, Von and Kev. 90% topic accuracy, a confidence temperature that brings it level with Jev on calibration, and one problem no …
- 6
· 22 minread
Laya 0.4.2 and VegaML: a Decision Model That Rolls a Ball Downhill, on a 16 GB MacBook
Laya shipped eight releases and nothing moved for routing. Its author also shipped VegaML, a decision model that answers by letting a particle settle in a valley. Zero-shot it isn't ready for my router, but it can learn from 40 labels in a …
- 7
· 20 minread
Laya on an N100: Swapping Jev for a Local Model in Home Assistant, and Teaching It My House with Hindsight
A Jev-compatible model running on a 4-core mini PC, with none of my sensor data leaving the house. Out of the box it said "yes" to almost everything. Trained on 2,019 real decisions judged with hindsight, it ties Jev on the ventilation and …
