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How to Set Up a 'Daily Operating System' in Claude Cowork

Create a persistent, context-aware workspace in Claude Cowork by setting up a project folder and a foundational 'brain' file with your personal preferences and instructions.

How to Set Up a 'Daily Operating System' in Claude Cowork

07:04 to 18:37: JJ Englert creates a folder-based daily operating system, writes a durable context file, and connects the folder to a Claude Cowork project.

Before you start

What you need

  • A dedicated folder for plans, notes, templates, and outputs
  • A concise personal context file with goals, preferences, and constraints
  • The Claude Cowork project that will use the folder

What you’ll make

A persistent Cowork workspace that can prepare daily priorities and carry the same preferences and operating context across sessions.

Tools used

Step by step

The workflow

Follow the sequence once, then adapt the prompts, checks, and handoffs to your own setup.

3 steps

Step01

Create Your Project Folder

On your computer, create a new, empty folder to act as the workspace for this project. A suggested name is Daily Operating System.

Example prompt
On your computer, create a new, empty folder to act as the workspace for this project. A suggested name is Daily Operating System.

My actual values:
[insert the files, settings, accounts, or constraints for this step]

Give me the exact commands, settings, or output to use. Finish with a pass or fail check for create your project folder.
Step02

Establish Your 'Brain' File

Inside your project folder, create a markdown file, for example, brain.md. This file will serve as a set of standing instructions for Claude. Populate it with key context like your working preferences, frequent collaborators, and preferred communication style so Cowork can reference it for future tasks.

Example prompt
# My Brain: Standing Instructions for Claude ## My Role & Goals
- My current role is [Your Role, e.g., Product Manager at a B2B SaaS company].
- My primary objective for this project is to [Your Goal, e.g., manage daily communications and prepare for meetings more efficiently]. ## Communication Style
- Tone: [Describe your tone, e.g., Professional but friendly, concise, use emojis sparingly].
- Formatting: [Describe formatting preferences, e.g., Use markdown for lists and bolding key takeaways. Keep paragraphs short].
- Audience: I typically communicate with [Describe your audience, e.g., engineers, executives, and customers]. ## Key Collaborators
- [Name], [Role]: [Brief description of your working relationship, e.g., My manager, I report to them on project status].
- [Name], [Role]: [Brief description, e.g., Engineering lead, I work with them on technical specs]. ## General Preferences
- [Add any other standing instructions, e.g., When drafting emails, always include a clear subject line. When summarizing documents, focus on actionable insights].
Step03

Connect Folder to a Cowork Project

In the Claude Cowork desktop app, create a new project from an existing folder and select the folder you just made. When prompted, provide high-level instructions that define the project's overall purpose. This initial prompt establishes the context for all future work in this project.

Example prompt
I'm gonna use this folder and operating system to help me navigate the day-to-day life of a busy professional. You're gonna help me with some superpowers by applying some AI magic to it all.

What good looks like

  • A new session can locate the right files without re-explaining the system
  • Daily outputs follow the written priorities and preferences
  • Generated files return to predictable folders with clear names

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After the steps

Runbook notes

How to recover when the loop fails and where human judgment helps.

Recover

If it goes sideways

The context file becomes a long biography that hides useful instructions
Keep durable goals, constraints, preferences, and file conventions; move temporary details into dated notes.
Cowork creates files in inconsistent locations
Define the folder map and naming pattern in the context file, then test one daily run.

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