All

Design decisions for the d2 (diesel2) prototype, recorded as they were agreed. Append-only; newest last.

This is the prototype's wiki: markdown topics that link to each other, to the domain model and to objects. Everything here is made up, a sandbox for trying d2.

Copperhead Mining is a made-up copper producer in British Columbia (CA-BC). It runs the Viper Ridge Mine on the prop-viper property, with its plant and camp.

The index.

How the sample model follows a drill campaign, using Frostline's 2026 program.

Frostline Resources is a made-up gold developer listed on the TSXV. Its main asset is the Frost Lake property in Ontario (CA-ON), home of the Frost Lake Main deposit.

Three doors, simple to complex. Pick one now; you can switch any time.

This is a project on d2: a notebook and an app in one, built with an AI.

The project log of d2conf: changes and decisions by the people on it, dated

Sam's copper view and the producer he uses as the benchmark.

Sam's watch on Frostline Resources: the drill results he is waiting for and what would change his mind.

How Sam wants the AI to behave: answer length, links, what to skip.

Who Sam is: a made-up weekend prospector and gold-junior investor. The demo user whose AI keeps these memories.

The sample domain in mining-domain has 56 classes in eight groups. The [model graph](/domain/overview) shows them all; its Groups tab shows them group by group.

North Royalty & Streaming is a made-up royalty and streaming company. It doesn't operate mines: it pays up front for a share of other companies' production.

No longer a pointer.

Keep one wiki topic per company up to date from a chat, linking objects instead of copying numbers. Use when the user shares news, results or opinions about a company in

Add or change classes in a d2 domain safely: one side per relationship, keys, then check the model and the objects. Use when the user asks to model something new or chang

this project's own way of working, on top of d2's skills; read after them. Its person and its AIs keep it.

- A room has a size. ^rooms-1

Readings come in; a limit decides who hears about it. alerts.notify stands in for a real channel such as email or a push message: here it only records what it would send,

A drill program comes back from the lab. Each hole is scored on its gram-metres (grade × width, summed over its intervals), graded by guarded rules, and the best hole mak

The smallest spec: one message and the rules that answer it. A rule's last payload goes back to whoever sent the message.

A made-up mining-company domain model for playing with domain tooling: the model graph (/domain/overview), the object browser (/dom) and the domain APIs. Converted from d

Placing an order: check the stock, price the lines, pick a discount, confirm. Each step is its own message, so each can be extended or replaced with rules of its own. The

Bringing a portfolio back to its targets. Each position is valued, compared with its target weight, and a guarded rule decides: buy, sell or leave it. Differences under 2

Three rounds of readings through alerts.

Frostline's fall program at the Aurora zone, through drill-results: five holes, one bonanza, one abandoned.

Sends hello's message twice and checks the answers.

Sample objects for mining-domain: three made-up companies (Frostline Resources, Copperhead Mining, North Royalty & Streaming) with their people, properties, deposits, dri

Three orders through order: a member's, a big one from a guest, and one the stock can't cover.

A small resource book drifted after a run in gold, through rebalance: one well over target, two under, two on target, and a 1,500 cash reserve to keep: the buys share wha

Short how-tos, each a few steps. Pick what you want to do; the guides below go deeper.