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MuleSoft Vibes configuration has three documented controls: skills supply reusable instructions for matching tasks, rules set ongoing constraints, and workflows package repeatable steps behind slash commands. For team sharing, put workspace rules and skills in the repository’s .a4drules/ directory. MuleSoft’s documentation reviewed here does not define a configurable Vibes hooks feature, so there is no verified hook setup to describe.
What skills, rules and workflows do
MuleSoft Vibes is a natural-language development assistant in Anypoint Code Builder for work such as API specifications and integrations. The three controls serve different purposes; choosing by when an instruction should apply helps keep it in the right place.
| Control | Scope and activation | Content | Where it can live |
|---|---|---|---|
| Skill | Task-specific; loads when a request matches its description | Reusable instructions, with optional supporting resources | Default or local skills; shared workspace skills can be stored in the repository |
| Rule | Global rules apply generally; workspace rules apply to the active workspace and remain active across conversations | Natural-language constraints | Vibes settings or shared markdown files in .a4drules/ |
| Workflow | Invoked by its slash command | A named, optional description and predefined sequence of steps | Configured in Vibes; available commands appear in the Vibes panel |
MuleSoft describes skills as loading when relevant, unlike workspace rules that stay active across conversations. That makes a skill a good fit for instructions needed only for a particular kind of task, while a rule suits a requirement that should persist. A workflow fits a repeatable sequence a developer can explicitly invoke. MuleSoft’s skills documentation and workflows and rules documentation describe these behaviors.
When to use a skill
Create a skill for reusable, task-specific guidance—for example, instructions for building Mule integrations, securing applications, configuring run settings, or upgrading Mule apps. MuleSoft’s default skills cover tasks in this vein. A skill can also include supporting resources alongside its instructions.
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For a project skill, create a directory under .a4drules/skills/ and put its instructions in a file named SKILL.md. Supporting files may be organized in subdirectories such as references/, assets/, or scripts/. Describe the skill’s purpose clearly so Vibes can match it to relevant requests. The skills guide also documents an installation route for using MuleSoft skills with other supported agents: the @salesforce/mulesoft-vibes-skills package and the command npx skills add mulesoft/mulesoft-dx/skills/mule-development. That route is agent- and tool-specific; it is not a prerequisite for every Vibes workspace.
When to use a rule
Use a rule for a requirement that should shape work consistently, such as naming conventions, API version information, or security checks. A useful rule states both the condition and what Vibes should do when it is not met.
For example, MuleSoft’s rules documentation describes a RAML naming rule that asks Vibes to check a title or base URI against a pattern and warn with a corrected value when it fails. Rules can also make error-handling guidance explicit, such as when to use On Error Propagate versus On Error Continue and to log the error type and correlation ID. These examples are guidance for assistant behavior, not a substitute for validation or governance processes. See Workflows and Rules.
Add a rule in Vibes settings
- Open Vibes settings in Anypoint Code Builder.
- Add a rule and enter the natural-language instruction.
- Save it. Choose global scope for a general requirement or workspace scope for a requirement tied to the active project.
The documented UI labels are described as Vibes settings, adding a rule, entering the instruction, and saving; exact screen wording can vary by product version.
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When to use a workflow
A workflow is a predefined multi-step task that you invoke when you want Vibes to follow a particular sequence. MuleSoft’s examples include API design review, API creation, and troubleshooting. Defined workflows appear as commands in the Vibes panel and can be launched with a slash command, such as /api-design-review.
For an API design review, the documented example checks RAML syntax and metadata, naming rules, and unsecured endpoints, then summarizes issues. A useful custom workflow should keep steps specific and reviewable. It can help surface issues, but it should not be treated as a replacement for formal governance: MuleSoft’s API-generation documentation says governance is not included in the described validation.
Add a workflow
- Open the workflow controls in Vibes, as described in MuleSoft’s Workflows and Rules guide.
- Give the workflow a name and, if useful, a description.
- Define the ordered steps so each check or action is clear.
- Save the workflow, then invoke its command from the Vibes panel with a slash command.
Share workspace rules and skills from GitHub
Keep shared configuration in .a4drules/ at the root of the repository opened as the Vibes workspace. Put rule markdown files directly in that directory. Put each skill in its own directory under .a4drules/skills/, with its instructions in SKILL.md.
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└── .a4drules/
├── api-naming.md
├── error-handling.md
└── skills/
└── mule-integration/
└── SKILL.mdThe names above illustrate the documented structure; choose filenames and skill names that fit your project. MuleSoft says Vibes loads these files for the open workspace. Open the repository root as the workspace: opening a parent or child folder instead can prevent the expected rules from appearing. Global rules and skills remain on the local machine rather than becoming repository files. See Sharing Rules and Skills from GitHub with MuleSoft Vibes.
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Set up Vibes and review its output
Before using Vibes for integration work, configure Anypoint Code Builder and ensure the required access is in place. MuleSoft’s integration guidance names the Mule Developer Generative AI User permission and enabling Einstein in Access Management as prerequisites. Requirements can depend on the task, so follow the relevant current product guide for the work you plan to do.
- Set up Anypoint Code Builder and confirm the required permissions for the intended Vibes task.
- Decide whether each instruction is task-specific (skill), persistent (rule), or an explicitly invoked sequence (workflow).
- Add rules and workflows in Vibes, or commit shared workspace rules and skills in the documented
.a4drules/structure. - Review generated specifications or code rather than assuming the assistant’s output is correct. For API specification generation, file changes can require approval when auto-approve is disabled.
For task-specific guidance, consult MuleSoft’s API specification creation and integration creation documentation.
What is documented about MuleSoft Vibes hooks?
The MuleSoft Vibes documentation cited here covers skills, rules, workflows, slash commands, settings, and project files, but does not establish hooks as a configurable Vibes feature. It does not provide a verified hook filename, lifecycle trigger, command syntax, or execution behavior. Do not infer that a hook configuration from another tool applies to Vibes; use the documented controls above unless MuleSoft publishes a specific hooks specification.
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