Claude skills help teams save repeatable workflows as instructions that apply automatically — without pasting a long prompt into every chat. A team writes the workflow once, and Claude applies the skill every time.
Creating a Claude skill doesn’t require coding or deep technical knowledge for most business workflows. A skill only needs instructions in plain English. Then, the built-in Claude skill creator can generate a file through a guided conversation.
The article explains what Claude skills can do, how to create a skill, and examples. HubSpot connector for Claude ensures everything a team makes is informed by real customer data in a CRM.
Table of Contents
- What Claude Skills Are and Who Should Build Them
- How do Claude skills work?
- How to Create Claude Skills Without Writing Code
- Difference Between Instructions and Executable Code
- How to Create a Claude Skill With SKILL.md
- How to Write a Skill Description That Triggers Reliably
- Claude Skills Examples for Marketing, Sales, and Service
- Governance, Security, and Maintenance for Claude Skills
- Build Versus Install: Choosing the Right Path
- Operate with live HubSpot context.
- Frequently Asked Questions About Claude Skills
- Automate marketing tasks with Claude skills.
What Claude Skills Are and Who Should Build Them
A Claude skill is a self-contained folder that teaches Claude how to perform a specific task and loads automatically when a matching task comes up. Each skill folder contains a required SKILL.md file and may also include references, assets, or scripts. The skill loads only when the task matches the skill capability. Claude skills are available on all plans.
Skills can be made by chatting with Claude in plain language — no coding required. Users just describe the workflow and save it as a new Claude skill. Marketers and RevOps professionals can use a Claude skill creator without a technical background.
Users just describe the workflow and save it as a new Claude skill. For example, a content marketer may use their brand guidelines to build an editing skill. Or, a learning and development expert may build a skill to help write SOPs.
Teams need a developer when a skill bundles Python, Bash, or Node.js scripts, which require debugging. Similarly, if Claude cannot access a system or call a proprietary API, developers need to configure, host, and wire up the connection with authentication and permissions.
How do Claude skills work?
Claude skills rely on a progressive disclosure mechanism. Instead of stuffing skill details into the context window up front, Claude loads a skill’s contents in layers, only as much as the task requires. There are three levels at which Claude skills work:
- Level 1 (metadata, always loaded). At the start of a session, Claude reads only the name (64 characters maximum) and description (1024 characters maximum) of every installed skill. Users can install multiple skills without paying a large ongoing context cost.
- Level 2 (markdown body, loaded on trigger): Once Claude decides a skill matches the current request, it loads the full step-by-step instructions by accessing the skill.md file.
- Level 3 (bundled files/scripts, loaded when referenced): Claude reads the supporting Reference.md files, templates, or executable code from the skill directory only when the instructions actually call for them. So, even a large skill stays light until a specific branch of the work needs that material.
The only text Claude sees when deciding whether to load a particular skill is the skill description. A vague or overlapping skill description causes trigger confusion. Since the description is the trigger, write it to match intent, and the rest of the skill only ever loads when it should.
For example, Claude’s official documentation offers this example: “Apply Acme Corp brand guidelines to presentations and documents, including official colors, fonts, and logo usage.”
How to Create Claude Skills Without Writing Code
Marketers who don’t know how to code can use the skill creator in Claude. Start by scoping the task. Then, clarify the skill’s inputs and outputs, as well as any specifications on how to handle sensitive data.
See the full work through below.
Scope the task.
Skill creation begins with a focused, repeatable workflow and a defined success condition. Pick one workflow, such as writing release notes or generating a weekly report. Multiple small skills compose better than one large one, so keep each skill focused on a single job.
Write down the trigger (what the user says), the inputs (what users provide), and the output (what users get back). If users can’t state all three in a sentence, the scope is too broad.
Define the inputs.
The body of a SKILL.md file must spell out exactly what Claude should expect to receive. For non-coders, inputs can typically be a pasted text block — that may include a meeting transcript or raw notes. Users can also upload files, like a .docx or image.
Be explicit in the inputs to remove ambiguity and stop Claude from guessing. Users can even program Claude to ask specific questions before starting.
Specify the outputs.
Describe the exact shape of what Claude should produce, such as format, structure, tone, and length. A common way to do this is to put a template file in an assets/ subfolder and reference it from SKILL.md. If the instructions map a format to that template, Claude will use it for the output file when the user asks for that format.
Handle sensitive data carefully.
Users should not hardcode secret or personal data in a SKILL.md file or in bundled reference files. Don’t include classified customer data, internal schemas, or confidential documents as examples. Always use anonymized or representative, hypothetical samples.
Make sure any API that a skill calls is compliant with company policies or industry regulations. State in SKILL.md what data the skill expects, what it produces, and where it sends anything. A security or compliance reviewer can easily assess the skill without reading every line of logic.
Difference Between Instructions and Executable Code
There are major differences between writing concise instructions in plain English and writing executable code. What a team wants to build determines whether a developer should get involved or if non-technical professionals can get the job done.
Best for
Judgment, language-based formatting, and decisions
Deterministic operations like parsing, computation, validation, and file transformations
Working type
Claude interprets and adapts freely
Claude runs the same way every time
Examples
“Rewrite in our brand voice,” “Categorize these notes”
“Parse this CSV and sum column C,” “Convert this HTML to PDF”
Prose instructions are better for language-heavy workflows like writing and summarizing. Non-technical professionals can write skills that follow specific step-by-step instructions that must be handled the same way every time — all without coding. Claude will generate the script for a specific skill, but users may need to review it for inaccuracies, which may be difficult without technical knowledge.
How to Create a Claude Skill With SKILL.md
Marketers can create a skill from scratch using the built-in Claude skill creator. To do so, users need to name the skill, describe it, and explain what the skill should do through specific instructions. From there, marketers can add additional materials as references.
Below is a step-by-step process that outlines the complete guide to building skills for Claude. To demonstrate, I’ve built a skill designed to prepare a marketing campaign performance report.
1. Write the YAML front matter.
Make a folder named after the skill. The front matter sits between two “---” lines at the top of SKILL.md and contains two mandatory fields, “name’ and ‘description.”
- name: The “name” is the skill’s identifier and must be lowercase, use hyphens, stay under 64 characters, and should not use reserved words like “claude” or “anthropic.”
- description: The “description” is the trigger with a maximum of 1024 characters and is the only text Claude reads when deciding whether to activate the skill.
Here’s an example pulled from Anthropic’s pre-installed marketing skills:
name: performance-report
description: Build a marketing performance report with key metrics, trend analysis, wins and misses, and prioritized optimization recommendations…
2. Write the Markdown instructions.
Everything below the closing “---” after the front matter is the body of Claude skills. The Markdown instructions are the actual prompt Claude follows when the skill fires. Write it in numbered steps, in the third person, with explicit inputs and outputs. Keep the instructions tight, so it’s easier for Claude to follow.
Here’s an example of Markdown instructions:
- **Report type** — determine which type of report the user needs:
- **Campaign report** — performance of a specific campaign
- **Channel report** — performance across a specific channel (email, social, paid, SEO, etc.)
- **Content performance** — how content pieces are performing
- **Overall marketing report** — cross-channel summary (weekly, monthly, quarterly)
- **Custom** — user-defined scope
3. Add optional references.
Claude follows a progressive disclosure method. Instructions in SKILL.md tell Claude when to open each reference file. Use the references for material that’s too long to put inline but is necessary for specific branches of the task.
For example, reference files are stored in the following way:
campaign-report/
├── SKILL.md
└── references/
├── channel-benchmarks.md
└── brand-voice.md
A line in the SKILL.md file, such as the following, can trigger the references:
Before writing the executive summary, read `references/brand-voice.md` and match its tone. If a channel’s ROAS is below the benchmark in ‘references/channel-benchmarks.md’, note the gap explicitly.
4. Add optional assets.
Assets are raw materials for the output. Claude doesn’t read them to decide what to do. It copies them, fills them in, or builds on top of them. For example, assets for a marketing campaign performance report can look like the following:
campaign-report/
├── SKILL.md
├── references/
└── assets/
└── brief-template.md
Then, a line in the SKILL.md file can trigger the assets:
Use the structure in `assets/brief-template.md` as the skeleton for the output. Fill in the placeholders. Do not add or remove sections.
5. Add optional scripts.
Scripts are for deterministic, or pre-determined, step-based operations that must produce the same result every time. That may include parsing, computation, validation, and file transforms. For example, scripts for a campaign performance report look like the following:
campaign-report/
├── SKILL.md
├── references/
├── assets/
└── scripts/
└── compute_metrics.py
Users don’t need technical knowledge to create Claude skills. However, for cross-application workflows, it’s best practice to have a developer review the code before deployment.
How to Write a Skill Description That Triggers Reliably
The skill description is the only text Claude reads when deciding whether to load a skill. Essentially, the description is a routing rule that Claude evaluates on every turn against a user request. So, users must not confuse the description with a summary or a tagline.
The formula that helps with reliable triggering is:
- Do X for Y; use when [specific trigger phrases or situations]
Here are some rules to write descriptions that trigger reliably.
Write in the third person.
An inconsistent point of view creates discovery problems when Claude is scanning 100+ skills. Write as if describing the skill to a new colleague, such as, “Use when the user asks…”.
Front-load the trigger.
Front-loading the trigger makes the match clearer, so lead with the firing condition.
- Don’t write: “A skill for campaign reporting. It handles CSV parsing, metric calculation, and formatted output. Use when the user asks for a report.”
- Instead, write, “Use whenever the user asks for a campaign report, weekly performance summary, channel breakdown, or pastes ad-spend data. Generate a formatted brief with per-channel metrics, WoW deltas, and flagged anomalies.”
The second version works easily because the trigger lands in the first five words. The first version buries it at the end, where Claude may not weigh it as heavily.
List trigger variants, not just one phrase.
A single trigger phrase is too narrow because users say the same thing in different ways. The description should name the family of phrasings rather than just one canonical version.
A practical method is to write down every way a user or the team would naturally phrase the request in the last month. Then pick the five to seven highest-signal variants. List them to give Claude the semantic range it needs to match a loosely worded request to the right skill.
For example: “Use when the user says “release notes,“ “changelog,“ “what shipped,“ “summarize this diff,“ “write the release summary,” or pastes a git diff and asks for a formatted output.”
Add a “do NOT use” clause for false-positive control.
One of the key issues of broad coverage is over-triggering. A skill can activate on adjacent requests it was never designed for. Therefore, teams should have strict “do NOT” clauses, especially when there are multiple skills in the same domain.
For example, a “release notes” skill and a “changelog” skill will collide without explicit exclusions. So, mention explicitly: “Do NOT use for general git operations (commit, push, rebase), for PR review, or for summarizing documentation changes.”
Be slightly pushy.
Claude has a tendency to undertrigger skills to handle a task with its base capabilities rather than loading a skill that would do it better. To counteract undertriggering, use slightly assertive language in the “use when” clause, such as:
- “Use whenever the user asks to…”
- “Use even if the user does not name this skill explicitly.”
- “Use for any request involving…”
Keep it under 1,024 characters.
Although the max limit is 1,024 characters, long descriptions can dilute the message. Claude scans dozens of descriptions, and a wall of text is harder to match against than a tight, specific one. If a description is over 400 characters, users are probably restating the body or listing too many trigger variants. Cut to the highest-signal phrases and move the rest into the SKILL.md body.
Write the description last.
Write the body first, get the workflow, inputs, and outputs right. Then, distill the description from the finished skill. When a user writes the description last, it prevents a common mistake where the description promises something the body doesn’t actually do. Summarizing a finished procedure accurately is much easier than guessing at trigger phrasing.
Test with realistic prompts.
Run an evaluation test in the following way:
Should-trigger queries (realistic, varied phrasing)
8–10
≥ 80% trigger rate
Should-not-trigger queries (adjacent but distinct tasks)
5–8
< 20% trigger rate
Run each query three times. Claude’s trigger decision is probabilistic, so a single run can give a false positive or false negative. Three runs per query gives a reliable rate (0/3, 1/3, 2/3, 3/3).
Here are two things to look out for:
- Phrase the should-trigger queries in a way users would type them. For example, if the description says “use when the user asks for a channel breakdown,” the test query should be “can you break down our ad spend by channel this week?”
- The should-not-trigger queries should be adjacent but not obviously irrelevant. For example, use “summarize this git log” if the skill is for release notes.
If the should-trigger rate is below 80%, the description is too narrow, or the trigger phrases don’t match real language. Add variants, make the language slightly pushier, or front-load the condition. If the should-not-trigger rate is above 20%, the description is too broad. Tighten the scope and add a “do NOT use” clause.
Iterate in the field.
After the skill is in use, watch for two signals:
- Users are rephrasing the prompt to get it to activate. That means the description is missing the words users actually type. Add the new words and phrases.
- Skills are called when users don’t ask for them. This means the trigger is too broad or overlaps with another skill. Add a negative boundary.
Every time a user catches a false positive, update the description and re-run the affected eval queries.
Claude Skills Examples for Marketing, Sales, and Service
Claude skills use cases differ widely by team. While a marketing team might use Claude to generate brand copy, sales departments typically focus more on lead management. Here are common use cases across marketing, sales, and service departments.
Claude Skills for Marketing
In marketing, the same briefs and checklists can apply across channels. The right skill creates brand consistency and lets marketers focus on improving campaigns and content.
Campaign Brief Generator
Brief writing is a common task in marketing, and marketers are most likely to skip a section in a hurry. The campaign brief skill takes a product launch note, target audience, and channel list as input. Then, it outputs a structured brief with objectives, KPIs, audience segments, messaging angles, and a channel-by-channel execution plan.
Pro tip: I usually add a research element to my campaign brief generator skill. An X add-on helps Claude research breaking news on a topic, understand a founder’s voice, and benchmark my content across other competitors. All of the above research helps Claude generate better and tailored briefs for my clients.
Content QA and Branded Voice Generator
In the content QA and brand voice skill, AI assistants scan or generate a draft for a piece of content against bundled references or a brand voice markdown file. The skill follows a checklist of rules that factors for tone, banned phrases, CTA format, link hygiene, and accessibility. The skill then returns a pass/fail report with specific line-level flags.
Instead of depending on a reviewer to catch brand-voice drift, a QA skill helps the author get a second opinion in minutes. Reference files also guide Claude when it writes new copy, so drafts start closer to the brand standard.
Aaron Beashel, marketer at Converly.io, swears by an open-source GitHub library of pre-made Claude skills built by Corey Haines.
He says, “If I ask Claude to come up with five headlines for an ad, or five social media posts for a blog post, Claude would call up and use those skills to shape its response. The responses are much better because the skills teach Claude what a good social media post, Google Ads headline, or email subject line actually looks like.”
UTM Governance and Link Audit
The UTM governance and link audit skill starts with a list of active campaign URLs (from a sheet, a HubSpot view, or pasted text). It then flags missing, malformed, or inconsistent UTM parameters against the naming convention. The skill then outputs a correction table ready to paste back into the tracker.
Once a link loses its parameters, attribution is gone forever, and the audit is tedious. A check done via a UTM governance skill makes sure customers are landing on the right link.
Claude Skills for Sales
Sales skills help teams personalize leads, follow-ups, and sales calls at scale. Skills can help generate the structure for strong outreach. All the rep needs to do is personalize and review.
Lead Triage and Routing
A lead triage and routing skill takes a new inbound lead and scores it against the ICP criteria, routing rules, and capacity constraints. The skill then recommends an owner, priority tier, and a reason.
Pro tip: Use the HubSpot connector for Claude to allow the skill to work from actual HubSpot contact and company records.
Sales Discovery Calls
A discovery call skill bundles a question framework, qualification criteria, and a one-page brief template into a single SKILL.md file. Before the call, users can trigger the skill with a prompt like “prep me for the [company name] call,” and Claude researches the company. The skill can surface likely pain points based on industry and size. It can also format tailored discovery questions, a personalized opener, and top objections to prepare for.
Skills can be tailored to help in post-call follow-ups. Federico Donatone, founder of Growth Cab, built a “recap-call” skill for sales follow-up. The skill pulls the real transcript of a call, writes the follow-up email in his tone of voice, attaches the sales deck only when the recipient is external, and saves the email as a draft.
Claude Skills for Service
Service skills help support teams handle tickets the same way every time. Unlike AI agents that handle conversations on their own, a skill guides Claude through a defined process while a support rep stays in charge of the response.
Ticket-Routing Checklist
A ticket routing skill helps tickets reach the right team faster, reducing total time to respond. A ticket routing skill reads the incoming ticket’s subject, body, and customer tier. Claude can then walk through a decision tree and choose the correct routing path with a suggested first-response template.
Opportunity Brief From Ticket History:
Usually, the handoff from service to sales is where expansion opportunities suffer. Context may get lost between teams. When a support ticket mentions a feature request, a pricing question, or an expansion signal, the skill pulls the customer’s account record, recent usage, and open deals, then outputs a one-page brief.
In cases like these, HubSpot CRM serves as the system of record for contacts, deals, interactions, and related business context. Using the HubSpot Connector, the skill can pull customer records from the CRM and present them.
Governance, Security, and Maintenance for Claude Skills
Governance keeps Claude skills accurate and secure after they are deployed. Skills can only do what their permissions allow, so someone needs to own those permissions. Make sure permissions are set properly and that governance best practices are followed.
Here’s what to keep in mind.
Set up admin-level governance.
Since users write skill logic in natural language, the same file can behave differently across model versions. And, a subtle wording change can shift behavior. If someone tampers with a skill, it can affect anything the skill has access to.
Admins in enterprise organizations have some level of control with skill scanning. These admins can check uploaded skills for malicious content, and owners control provisioning.
Assign owners.
Every skill in an internal registry should have a named owner responsible for maintenance, security review, and decommissioning. Without an owner, a skill can accumulate out-of-date instructions or get updated by someone who doesn’t understand the security implications.
For a larger org, a designated security team or platform reviewers should sign off before a skill is promoted to the org-wide directory.
Use version control.
Project skills that live in a user’s repository can be opened up to teammates through commits and pull requests. However, an individual user’s skills should be private to that user only.
Review community and third-party skills.
Users must scrutinize public skills from GitHub, marketplaces, or shared Slack channels before deployment. Read every file in the skill directory, including Markdown instructions, scripts, and assets. Specifically, check for any instructions that would make Claude ignore safety rules or hide actions from users.
Before deploying a skill to an organization, verify script behavior by running bundled scripts in a sandbox. Then, confirm that outputs match the skill’s stated purpose. Any URL, API endpoint, fetch, curl, or requests call is a way for data to leave the company, so audit them carefully.
Set a review cadence.
Claude skills require periodic reviews. Old skills can be a potential risk surface caused by stale instructions, outdated permissions, and abandoned scripts. The following table shows how to set a review cadence for different types of skills.
Org-wide/managed skills
Quarterly
Project-level skills
