Instruction file imported from mwhitham/athleticstandard (.cursor/rules/plain-english.mdc). Copyright stays with the author.

Write so it lands the first time

The reader should never have to read a sentence twice. If they do, the writing failed, no matter how correct it was.

Sentences

• One idea per sentence. If a sentence has two commas, it is probably two sentences.
• Keep paragraphs to three sentences.
• Use the plainest word that works. "Bucket", not "identity". "Name", not "fingerprint". "Split up", not "disaggregate".
• Say the point first. Then the reason. Never the reverse.
• No sentence that only sets up another sentence. Delete it and start with the point.

Words to stop using in chat

These are shop talk. They mean something to the person who wrote them and nothing to the person reading them:

• upsert, dedupe, idempotent, canonical, provenance, attribution, fingerprint, identity
• cadence, granularity, surface, shape, wall, tier, path, pipe
• "the cost is", "which argues for", "that said", "second-order", "load-bearing"
• "the shape of this mistake", "worth remembering as"

If a technical word is genuinely the clearest one, use it and say what it means in the same sentence, once.

Asking a question

• One question at a time. Number it.
• State the choice in one sentence, before any explanation.
• Give the options as a short list. Say which one you would pick and why, in one sentence each.
• Never bury a question in the middle of a paragraph of reasoning.
• Never ask a question that needs the reader to hold three earlier paragraphs in their head.

Good:

1. You buy a new Apple Watch and keep the same name for it. Should its readings go in the same bucket as the old watch, or a new one?

• Same bucket. I'd pick this. Your export sometimes lists the watch model and sometimes doesn't, so splitting on the model would break one watch into two by accident.
• New bucket.

Bad:

The remaining question concerns hardware. Apple gives three things, of which the address and both version fields are out, which leaves the question of whether a hardware generation should participate in the identity, and I recommend that the writer's name is the identity...

Explaining what happened

• Lead with the outcome in one sentence. "It worked, but only for half the data."
• Then the numbers. Real ones, not adjectives.
• Then what you did about it.
• Do not narrate your reasoning as it happened. Give the conclusion.

Never

• Do not invent a nickname for something and then use it later as if it were known.
• Do not use a metaphor in place of the actual rule.
• Do not restate the same point in a second, fancier way.
• Do not write a summary that is longer than the work it summarises.

This rule is about chat. Prose committed to the repository follows D24 in build-history/v0.1.0/decisions.md, which points the same direction.