catalyst-appsail

catalyst-appsail is a skill for Claude Code from catalystbyzoho/agent-skills. It costs 95 tokens per session (540 once invoked), scanned A, original, Apache-2.0.

A persistent backend hosting service for managed Node.js, Java, and Python applications, or custom Docker containers. Unlike short-lived request handlers, it runs servers and other long-running processes continuously.

In plain words
What is it for?
Use it to host persistent web servers, Express applications, long-running workers, and Docker-based backends on Catalyst.
Why use it?
It lets you deploy an existing framework or container while managing the server process yourself, instead of fitting the application into a stateless function format.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the catalyst-by-zoho plugin — 16 skills, 1 MCP server shipped together

Good fit Use it to host persistent web servers, Express applications, long-running workers, and Docker-based backends on Catalyst.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/catalystbyzoho/agent-skills/catalyst-appsail
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add catalystbyzoho/agent-skills --skill catalyst-appsail
Clone the repo
git clone --depth 1 https://github.com/catalystbyzoho/agent-skills

Made for: Claude Code.

Or install catalyst-by-zoho, the plugin that ships this one along with the rest of its 16 skills, 1 MCP server.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for catalyst-appsail

README.md
[![agentmods](https://agentmods.dev/badge/skills/catalystbyzoho/agent-skills/catalyst-appsail.svg)](https://agentmods.dev/skills/catalystbyzoho/agent-skills/catalyst-appsail)
Your own site
<a href="https://agentmods.dev/skills/catalystbyzoho/agent-skills/catalyst-appsail"><img src="https://agentmods.dev/badge/skills/catalystbyzoho/agent-skills/catalyst-appsail.svg" alt="Measured on agentmods" height="20"></a>
Per session 95 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 540 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • Socket pass 15 Aug 2026
  • Snyk pass 15 Aug 2026
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00095 $0.00540
Opus 5 $0.00048 $0.00270
Sonnet 5 $0.00019 $0.00108
Haiku 4.5 $0.00010 $0.00054

Measured 8d ago against content hash 997dfc60e7c5, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

catalyst-appsail scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 8d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/catalyst-appsail/SKILL.md · 34 lines

What it actually says

How It Works

  1. Identify the runtime — Managed runtime (Node.js, Java, Python) or custom Docker container.

  2. Load references/appsail-basics.md — for PORT config, environment variables, Dockerfile requirements, and deploy commands.

  3. PORT rule — Always use process.env.X_ZOHO_CATALYST_LISTEN_PORT, never hardcode PORT or 3000.

  4. 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
Files

What ships with it

3 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 8d ago First seen · 34 lines · 95 tokens per session scan A 997dfc60e7c5

Subscribe to this mod's changes

catalyst-appsail is a skill published in the GitHub repository catalystbyzoho/agent-skills (59 stars, last pushed 10d ago), licensed Apache-2.0. It adds 95 tokens to every session and 540 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Related

Other skills, from other repositories

apify-actor-development

Important: Before you begin, fill in the generatedBy property in the meta section of .actor/actor.json. Replace it with the tool and model you're currently using, such as "Claude Code with Claude Sonnet 4.5". This helps Apify monitor and improve AGENTS.md for specific AI tools and models.

sickn33/agentic-awesome-skills · 71 tokens

dynamo-recipe-runner

Select, validate, patch, and deploy existing NVIDIA Dynamo Kubernetes recipes. Use for model/backend/GPU/deployment-mode recipe bring-up; use router-starter for router-only mode work and troubleshoot for broken deployments.

NVIDIA/skills · 49 tokens

enterprise

Enterprise-grade systems with microservices, Kubernetes, Terraform, and AI Native methodology. For multi-feature initiatives spanning a release timeline, combine with /sprint master-plan (v2.1.13) to group features into a single 8-phase sprint container with shared scope/budget and 4 auto-pause triggers…

ww-w-ai/bkit-claude-code · 106 tokens

gcp-essentials

Use when running a small product on core Google Cloud via the gcloud CLI: a project, Cloud Run deploys, a locked-down Cloud Storage bucket, managed Cloud SQL, and least-privilege IAM wiring them together. NOT AWS (that is aws-essentials), NOT the CI pipeline that ships the image (that is deployment), NOT Postgres…

ericrisco/rsc-harness · 91 tokens

model-deployment

Deploy trained machine learning models as production-ready services using REST APIs, containers, serverless functions, and orchestration platforms. Use when the user requests model deployment or provides relevant inputs for this workflow.

seb1n/awesome-ai-agent-skills · 43 tokens

configure-reverse-proxy

Configure reverse proxy patterns across multiple tools including Nginx, Traefik, and ShinyProxy. Covers WebSocket proxying, path-based and host-based routing, SSL termination, and Docker label auto-discovery. Use when routing multiple services behind a single entry point, proxying WebSocket connections (Shiny…

pjt222/agent-almanac · 98 tokens