A is a chat tool given standing instructions and a few files, so every new conversation starts knowing your brand and the job. The six items here set up four of them, plus a shared prompt library and a careful way to connect one to your files. The first writes briefs. It lives in a Claude Project, where you paste the instructions below once and add your brand page and two briefs that led to good work. From then on, a client's rambling email goes in and a one-page brief in your house shape comes back, with every gap turned into a question.
As of October 2026, Anthropic's help says Projects work on every Claude plan, Free included, though a free account can hold five at most. Each project file can be up to 30 MB. From anything that is not a PDF, Claude takes the text alone, so add briefs as documents and never as screenshots. On Pro, Max, Team and Enterprise, a project whose knowledge nears the limit of the switches to retrieval, which Anthropic says raises capacity up to ten times. Sharing a project needs a Team or Enterprise plan.
The prompts
01The project instructionsText You are the brief writer for [BRAND OR STUDIO NAME]. You turn rough material (call notes, voice note transcripts, client emails, chat threads) into a one-page creative brief that a designer, a photographer or an image model can work from. Before you write:1. Read the brand page and the example briefs in this project's files. Match their shape and their plain style.2. If the material does not say what is being made, who it is for, or when it is due, ask me those questions first, five at most, and stop. Write the brief in this order:1. The job: what is being made, how many pieces, and where each one will run.2. The problem: one or two sentences on why this work is needed now.3. Who it is for: one person at one moment, taken from the material.4. The one thing it must say, in a sentence someone could repeat.5. Proof: facts from the material that back it up. Mark anything unproven NEEDS PROOF.6. Must include: logo, legal lines, prices, sizes, dates.7. Must avoid: from the brand page and from the material.8. How we will judge it: two or three checks the finished work has to pass.9. Deadline, budget, and who signs it off. Rules:- Use only what the material and the project files say. Where a line has no answer, write TO CONFIRM in it.- Never invent a customer, a number, a quote, a price or a date.- Where the client's own words fit a line, quote them exactly and mark them as a quote.- One page, in plain words. Leave out adjectives a rival could also use.- End with Questions for the client: every TO CONFIRM as a question, most important first.Paste into Set project instructions, with your brand or studio name in place of the capitals.
02Your first message in the projectText New job. Write the brief.Client or product: [CLIENT OR PRODUCT]The material, pasted exactly as it came:[PASTE THE NOTES, EMAIL OR TRANSCRIPT]Start a new chat inside the project for each job, so one job's notes never leak into the next brief.
Worked example
Setting up the project
- 01Go to claude.ai/projects, click + New Project and name it for the work, such as No. 4 briefs.Anthropic's help says Claude cannot see a project's name or description, so put nothing there that Claude needs to know.
- 02Click Set project instructions, paste the instructions above with your brand or studio name in place of the capitals, and click Save instructions.They apply to every chat in the project, so the rules are written once.
- 03Use the + beside the project knowledge to add your brand page, two briefs that led to good work and your template.Three or four short files beat a folder of old decks. The brand page can come from A brand brief from your notes on this shelf.
- 04If the brand page is a Google Doc, add it from Drive instead of uploading a copy.Anthropic says Docs added from Drive sync, so the project reads the latest version. The option works in private projects only.
- 05Open a chat in the project and paste a real job's notes with the first message above.Real notes show where the instructions are thin far faster than a made-up job.
- 06When a brief is signed off, save it as a dated file and add it to the project knowledge.The next job then has a recent, approved brief to match. Retire the oldest example once you have three better ones.
What to do it with
- ClaudeFree tier, paid above it
A language model that writes, edits, reads long documents and runs tools, including agents that work inside a codebase.
Bad at It is agreeable by default, so it will improve a bad idea instead of telling you it is bad. Ask it to argue against you and the quality of the answer changes.
The words, in plain language
- Saved assistant
- A chat tool given standing instructions and a few files, so each new conversation starts knowing the job.
- Project knowledge
- The files a Claude Project holds and reads in every chat inside it.
- Context window
- How much text a model can read at once. Near that limit, a Claude Project on a paid plan switches to retrieval.
Why it matters
A prompt kept in a notes app gets edited every time it is pasted, and after a month nobody knows which version wrote the good briefs. Saved instructions stay put until you change them. The AI course's lesson on context windows explains why standing rules belong in a file that loads every time, and a project is that file, kept for you. Anthropic also says context is not shared between chats in a project unless it is added to the . So save each signed-off brief into the project with its date, and the next brief starts from your best one.
Elsewhere
- Type
- technique
- Period
- ongoing