Instructions

# Tell every agent *once.*

Instructions are the rules you write yourself, in Settings. Every Claude Code and Codex request on every machine carries them.

[Start free](https://context-mode.com/docs/quick-start)[Read the docs](https://context-mode.com/docs/instructions)

How it works

## You set the rule. *Every agent follows it.*

1. 01**You write it** “Keep answers short.” Up to 4,096 characters, in Settings.
2. 02**Every request carries it** Claude Code and Codex, on every machine. No file to copy into each repo.
3. 03**Your message still wins** Ask for detail in one turn, and you get detail.

Instructions or Memory

## You write one. *The other is learned.*

**Instructions**

Written by you. Change only when you save. How the agent should answer you.

**Memory**

Learned from your sessions. Changes as facts change. What is true about you and your projects.

Features

## Costs almost nothing.

**From the cache**

After the first request, it is read at the cache price, not as new input.

**System prompt untouched**

It goes at the start of the conversation. Your client stays as it is.

**One per account**

Both agents, every machine. Clear the box to turn it off.

## Write it *once.*

*npx @context-mode/cli* connects your agents. 1,000 requests free, no card.

[Start free →](https://context-mode.com/docs/quick-start)[Read the docs →](https://context-mode.com/docs/instructions)