How to use
- Copy the installation command and review the source package before installing it in your own agent environment.
- Check the source document for required tools, credentials and supported hosts.
- Describe your input and desired deliverable; review the output against the source material.
npx skills add https://github.com/catalystbyzoho/agent-skills --skill catalyst-appsailBefore you start
- Installation does not include a model subscription, API allowance or permission to access your files.
- Repository stars and installation counts describe activity, not an independent quality or security test.
Rendered from the source repository. Headings, examples, code, tables, links, and referenced images are preserved.
How It Works
- Identify the runtime — Managed runtime (Node.js, Java, Python) or custom Docker container.
- Load `references/appsail-basics.md` — for PORT config, project structure, and Dockerfile requirements. For deploy commands and environment variables, load
references/appsail-deploy.md. - PORT rule — Always use
process.env.X_ZOHO_CATALYST_LISTEN_PORT, never hardcodePORTor3000. - AppSail vs Functions decision — If the user is unsure which to use, apply this matrix:
| Catalyst Functions | AppSail | |
|---|---|---|
| Code structure | Catalyst-specific templates required | Any framework, any format, fully independent |
| Use case | HTTP handlers, events, cron, Zoho integrations | Persistent servers, long-running processes, Docker |
| Billing | Per API call | Per instance uptime |
| Dependency management | Handled by Catalyst | You manage all libraries and frameworks |
Triggers
Use this skill for: "AppSail", "persistent server", "Docker on Catalyst", "backend hosting", X_ZOHO_CATALYST_LISTEN_PORT, appsail:add, "catalyst managed runtime", "deploy Express app", "AppSail vs Functions", "long-running process on Catalyst", or "containerized app on Catalyst".
References
| Reference | Load when the query is about… |
|---|---|
references/appsail-basics.md | Runtimes, project structure, app-config.json fields, Node.js/Docker templates, SDK version |
references/appsail-deploy.md | Deployment commands (Path A/B/C), env variables, health checks, AppSail URL pattern, configurations |
references/appsail-crossorigin.md | Slate + AppSail cross-origin errors, CORS setup via MCP, catalyst_auth, custom domain SSL |


