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How to Create Your First AI Marketing Context File in Markdown
Learn what to put in a first AI marketing context file: audience, offer, tone, boundaries and source rules, with a privacy check and one-task test.
A first AI marketing context file only needs to capture the stable background a tool needs for a recurring task. Start with five headings: audience, offer, tone, boundaries and source rules. Keep the file small, review it for sensitive information and test it on one task.
Markdown is a plain-text format with simple markers for headings, lists and links. It can make the background easier for a person to read and edit, but it does not guarantee privacy, accurate output or consistent behaviour from an AI tool.
What is an AI marketing context file?
An AI marketing context file is a short reference document that explains the background an AI tool may need to support a particular area of work. It might describe who the work is for, what is being offered, how the writing should sound, what boundaries apply and which sources are approved.
The useful distinction is between stable background and changing task details. The context file might say that the audience is a small B2B marketing team and that the tone should be practical and clear. The current prompt can then say what today's topic, channel or deliverable is.
This is different from a reusable marketing prompt. A prompt tells the tool what to do for the current request. A context file gives background that may remain useful across several requests. It is also different from a workflow map, which explains how work moves from one stage to another.
Why use Markdown for the first version?
Markdown is a way of writing structured text using ordinary characters. A # can mark a main heading, ## can mark a section and a hyphen can mark a list item. The CommonMark specification describes these structural elements, and GitHub's Markdown guidance shows the syntax in practice.
That makes Markdown a reasonable format for a first context file because a person can inspect the raw text without needing a special database or editor. It is a recommendation for readability and easy editing, not a claim that Markdown is the only useful option.
Markdown does not encrypt the file, decide who can access it or remove sensitive information. It also does not force an AI tool to follow every line or make the resulting output accurate. Treat the format as a container for your approved background, then apply the right privacy and human review process around it.
The five headings for a small first file
The following five-heading structure is a practical recommendation. Include only information that is stable, approved and genuinely useful for the task.
1. Audience
Describe the person or group the marketing work is intended to help. Keep this useful and specific enough to guide language, without adding personal data or an invented persona presented as research.
You might record the audience's role, level of familiarity with the subject, common problem and preferred level of explanation. If those details come from assumptions rather than research, label them as assumptions.
2. Offer
Describe the product, service, subject or proposition in the terms that have been approved for use. Include only the basic facts the AI needs to avoid making up details.
If the offer changes regularly, keep the current details in the task brief or an approved source rather than allowing the context file to become an outdated catalogue.
3. Tone
Describe how the work should sound. For example, you might specify clear UK English, a practical and measured tone, short explanations and no hype.
Tone guidance should support judgement, not replace it. A tone heading cannot decide whether a message is accurate, relevant or appropriate for a particular channel.
4. Boundaries
State what the AI should not assume, do or include. This might include avoiding unsupported claims, not presenting illustrative examples as real results and flagging uncertainty rather than filling gaps with invention.
You can also record the point at which a person must review or approve the work. Keep this as a clear boundary, not a complete governance manual.
5. Source rules
Explain which information may be treated as approved background and what should be checked before use. You might say to use supplied notes first, preserve uncertainty, identify claims that need a source and avoid inventing figures, quotations or case studies.
Source rules are not the same as sources. Link or attach the approved material through the process you use, and check that it is current. A context file that says “use reliable sources” does not itself make a claim reliable. A workflow map can then show how that context is used and where review happens.
An illustrative five-heading template
Illustrative template: This blank structure is a teaching example. It is not a real brand manual, client file, employer document or tested AI configuration.
## Audience
- Who is this work for?
- What problem or question are they trying to address?
## Offer
- What approved description or facts may be used?
## Tone
- What should the work sound like?
- Which language or style choices should be avoided?
## Boundaries
- What must not be assumed or claimed?
- When must a person review or approve the work?
## Source rules
- Which notes or sources are approved?
- Which claims need checking before use?The questions are prompts for your own approved background, not content to fill with guesses. A small file with a few useful lines is a better starting point than a long document that mixes current task details, old instructions and private notes.
Review the file for sensitive information
Do this review before sharing the file with an AI tool, even if the file feels like general marketing background. Markdown is plain text, so its file extension does not make the information private.
Read each line and ask:
- Does this contain personal information or private customer detail?
- Does it contain confidential, employer-sensitive or commercially restricted material?
- Does it include a password, access token, private link or other credential?
- Is every line necessary for the task, or can it be removed or generalised?
- Do I have permission to use this information in this tool and for this purpose?
Remove or generalise anything that is not authorised or necessary. If the information is genuinely needed, confirm the relevant tool policy and organisational process first. For higher-risk work, use the relevant legal, privacy or specialist guidance. This is a sensible working review, not a guarantee of compliance.
Test it on one task
Once the file has passed the privacy review, use it on one small task. Keep the task separate from the context file so you can see which details belong to the stable background and which belong only to today's request.
Check whether the AI has enough background to understand the intended audience, offer, tone, boundaries and source rules. If a line is missing, unclear or outdated, revise the file deliberately. If the issue is specific to today's task, update the task prompt instead.
This is a first-use check, not a complete testing programme. It does not prove that the context file improves accuracy, consistency, efficiency or performance. It simply gives you a chance to inspect the boundary before you reuse the file.
What should stay out of the first file?
Leave out anything that is not stable, approved and necessary. That includes a full content calendar, every possible customer question, old positioning, unverified claims, private notes and a long list of instructions for unrelated tasks.
Do not use this first file as a complete brand manual, knowledge base, prompt library, agent or automation system. If the document keeps growing, separate the problems. A prompt template can handle a repeated request, a workflow map can show stages and a later system may need more structured knowledge. This first file only captures the background needed for a small area of work.
Your next step
Create a plain-text Markdown file with these five headings:
- Audience
- Offer
- Tone
- Boundaries
- Source rules
Add only stable, approved information. Review every line for sensitive material, then test the file on one small task. Record what was missing or unclear and change one section deliberately.
The goal is not to make a perfect reference file. It is to create a small, inspectable piece of context that helps a person decide what an AI tool should know before the work begins.
Further reading
You Might Still Be Wondering...
Frequently asked questions
A prompt gives the AI tool the instruction for a particular request. A context file records stable background that may be useful across several requests. They can be used together, but they solve different problems.
No. Markdown is recommended here because it is readable plain text with simple structure. A different format may suit your tool or team better. The important part is keeping the background small, approved and easy for a person to inspect.
No. Markdown describes how text is structured, not who can access it or how it is protected. Review the file for personal, confidential and access-sensitive information, then follow the relevant tool and organisational process before sharing it.
It may give an AI tool useful background, but it does not guarantee accurate, relevant or consistent output. Review the result, check important claims and update the context when approved background changes.
There is no useful universal length. Start with the smallest file that explains the five headings for one area of work. If a line does not help the tool understand the task's stable background, leave it out or keep it in a separate source.
Pause and separate stable background from changing task details. Remove outdated or unnecessary material, and consider whether part of the content belongs in a prompt, source register, workflow or another deliberately maintained document.