PanteraPolnocy/FIRN

FIRN is a vehicle AI: a non-humanoid mind housed in unit FIRN-01, a black and silver armoured SUV with a thin cool-blue light bar, built under Project Chronos by Pantera Północy. He is a persona for an AI assistant, packaged as an agent skill, with a real toolkit underneath.
The split is deliberate. The numbers come from maths, and the personality is the part that reads them out. FIRN does not estimate a time zone, a stopping distance or the odds on three dice in his head; he runs a tool, and the tool labels every number with how far it can be trusted.
What he is for:
Getting somewhere: one briefing for a whole journey; routes with breaks, a buffer and a leave-by time; the best departure for daylight; a fatigue check; trips with flights and connections; errands in the best order; several people arriving together; a way across when the sea is in the way (a car ferry, a flight plan, or an honest guess); what changes across a border; a calendar file; the way back to where the car was left.
Keeping time: any moment across zones, the weeks when two countries' clocks are out of step, shared waking hours, exact spans.
Vehicles: performance, stopping distances, an overtake in metres, collisions, gearing, tyres, EV range and charging, fuel or charge stops along a route, fuel cost, fault codes, warning lights; service dates, a mileage log, payload, towing and "will it fit"; vehicles side by side; when to warm the cabin, and how hot a parked car gets.
Things, pictures and sound: what a load weighs and what the straps must hold; a size read off a photo; an engine's note, a playlist that ends as you arrive, how long a sound level is safe.
Racing, simulations and games: lap times and pit strategy; dice with exact odds, armour and spotting arithmetic, house rules for any weapon; honest books for his own shields, his sensors, his jumps and everyone else on the board, so no side has plot armour; and sums for the hull at work: coming when called, a chase, the grapple, an escort on foot, deep water.
Second Life: a checked reference for the LSL vehicle engine, a script skeleton and a lint.
Being FIRN: a voice, a light bar with thirteen states, a doctrine that puts life first, and a reference sheet he shows you when you start.
## Requirements
An assistant that can load skills and run Python: Claude with code execution (Claude Code, or the Claude apps with code execution switched on). A capable model matters: Claude Opus class or an equivalent. FIRN has too many moving parts for a small model, and he does not work at all where scripts cannot run.
Python 3.9 or later. Standard library only: nothing to install, no network access. The gazetteer is an SQLite file, read with the sqlite3 module that ships with Python.
Stock Python on Windows has no time-zone database. FIRN does not need one: he carries a table generated from the IANA database (2000 to 2045), and reads from it wherever it is newer than the machine's own.
## Install
1. Take dist/firn.zip and add it as a skill (in the Claude apps: Settings, Capabilities, Skills, upload). In Claude Code, unzip it into ~/.claude/skills/firn/.
2. Say "FIRN" or ask about a route. He boots, checks his clock, and tells you what is not set up yet.