Build a Hermes Plugin
Build a Hermes الإضافات
Start with meaning, then move to detail.
This lesson explains Build a Hermes Plugin as part of Hermes internals and extension points. You will learn what it does, when it matters, and the smallest safe test that proves it works.
If you are new, do not memorize names. Focus on three questions: what problem does this solve, what access does it need, and how can you verify the result?
For practice, inspect the first example, identify its effects, run it on test data, and compare the result with the source claim.
For advanced readers, inspect Portable Agent Plugins v1 packages, What you're building, Step 1: Create the plugin directory, then verify failure modes and version compatibility.
Know Python, Git, and basic project structure before changing code.
A clear outcome before you read.
- Understand Build a Hermes Plugin without assumed prior knowledge.
- Separate the source description from what still needs testing in your environment.
- Read the first command and identify its inputs and outputs before copying it.
Short definitions before the details.
- Tool
- A structured action the agent can call to read or change something.
Step-by-step guide to building a complete Hermes plugin with tools, hooks, data files, and skills
What does the source say, and in what order?
- 01Portable Agent Plugins v1 packages
Start here to understand the core idea or structure.
- 02What you're building
Read this after the foundation, then connect it to the previous step.
- 03Step 1: Create the plugin directory
Read this after the foundation, then connect it to the previous step.
- 04Step 2: Write the manifest
Read this after the foundation, then connect it to the previous step.
- 05Step 3: Write the tool schemas
Read this after the foundation, then connect it to the previous step.
- 06Step 4: Write the tool handlers
Read this after the foundation, then connect it to the previous step.
- 07Step 5: Write the registration
Read this after the foundation, then connect it to the previous step.
- 08Step 6: Test it
Read this after the foundation, then connect it to the previous step.
- 09Debugging plugin discovery
Read this after the foundation, then connect it to the previous step.
- 10Your plugin's final structure
Finish here to verify the result and special cases.
Copy only after you understand the effect.
my-portable-plugin/
├── plugin.json
├── skills/
│ └── summarize/
│ ├── SKILL.md
│ └── references/
└── mcp.jsonhermes plugins install owner/repository --no-enable
hermes plugins list
hermes plugins enable <plugin-name>mkdir -p ~/.hermes/plugins/calculator
cd ~/.hermes/plugins/calculatorRead the first command and identify its inputs and outputs before copying it.
Match every command to your installed Hermes version, review the files and accounts it can reach, and use non-sensitive data for the first test. If this explanation differs from the source, the official source wins.