Cxc Dev Backend

Community

lidge-jun

cxc-dev-backend

Use for APIs, servers and app databases. Triggers: REST, GraphQL, migration, query optimization, middleware, caching, queues, 백엔드, API 작업, 마이그레이션, 쿼리 최적화.

Overview

Publisher	lidge-jun
Repository	`codexclaw`
Skill name	`cxc-dev-backend`
Stars	51
Forks	10
Bundled files	23
License	MIT
Links	Skill source Repository Homepage

Markdown instructions
A SKILL.md file the model loads on demand, so it only costs tokens when a request actually matches.
Works with any LLM
AI skills are plain Markdown, not provider-specific code, so this works with GPT, Claude, Gemini, Grok, or a local model.
23 bundled files
Scripts, templates, and references the model can read while it works. Files are read-only and never executed.
Open source
Published by lidge-jun on GitHub. Read the source before you install it.

Installation

Install the Cxc Dev Backend AI skill in TypingMind to use it with any LLM, or drop it into another agent that reads SKILL.md.

Install in TypingMind

TypingMind installs a skill straight from its GitHub folder — it reads SKILL.md, bundles the resource files, and stores the result locally.

Open the app and go to Plugins → Skills.
Choose "Install from GitHub".
Paste the skill folder URL below and confirm.
https://github.com/lidge-jun/codexclaw/tree/main/plugins/codexclaw/skills/dev-backend
Enable the skill in any chat where you want it available.

Plugins → Skills → Add skill → From GitHub URL, then paste the folder URL and press Continue.

Install in another agent

Any agent that reads the Agent Skills format can use this skill — copy the folder into that agent's skills directory.

Claude Code — .claude/skills

git clone --depth 1 https://github.com/lidge-jun/codexclaw.git /tmp/codexclaw
mkdir -p .claude/skills
cp -r /tmp/codexclaw/plugins/codexclaw/skills/dev-backend .claude/skills/cxc-dev-backend

Restart Claude Code after copying so it picks up the new skill.

Use it in TypingMind

Enable Cxc Dev Backend in any TypingMind chat and the model takes it from there. Its name and description sit in the system prompt, and the moment a request matches, the model loads the full instructions itself — you never invoke it by hand, and it costs no tokens until it is actually used.

The model loads Cxc Dev Backend on its own as soon as a request matches it.

Works with any AI model

AI skills are plain Markdown instructions rather than provider-specific code, so Cxc Dev Backend is not tied to the model it was written for. Install it once in TypingMind and use it with GPT-5, Claude, Gemini, Grok, DeepSeek, Mistral, Llama, or a local model you run yourself — all on your own API keys.

Loaded only when it is needed
The system prompt carries just the name and description. The instructions are fetched on the first matching request, so an idle skill costs nothing.
Switch models mid-chat
Because the skill is instructions rather than code, changing model does not break it — the next model reads the same SKILL.md.

Skill instructions

This is the SKILL.md content the model loads. Read it before installing — a skill is instructions your model will follow.

Dev-Backend — Production-Grade Backend Engineering

Ownership boundary: This skill owns API design, app architecture, database optimization, error handling, middleware, queues, long-lived connections, and app-level observability/health hooks. Deployment strategy, rollback proof, rollout shape, SLOs, alert routing, incident response, and operational readiness gates are owned by dev-devops. Backend exposes the app-level hooks that DevOps operational gates consume.

Build reliable, secure, and maintainable server-side applications. This skill is a routing role that activates by change-surface: whenever the work primarily touches APIs, servers, services, jobs, data access, schemas, migrations, or operational backend behavior, use this skill and then read the relevant references.

Before backend work, read dev for classification, fast paths, rule authority, family invariants, verification, and safety; current/public evidence follows its Conditional Routes.

Modular References

Condition	Reference
C2 ordinary CRUD/resource slice	CRUD API alone suffices
New/changed API style or C3+ API work	API design
Versioning, deprecation, or API migration	API lifecycle
Stack detection, ambiguous technology, or architecture/protocol selection	Setup; C3+: Architecture
New endpoints, classes, or modules	Anti-slop
SSE/WebSocket, runtime timeouts/drain/request IDs, or async queues	Connections and queues
Layer placement, error mapping/Result, middleware order, or response contracts	Request contracts
Caching, observability, template evaluation, performance, SEO, handoff, or delivery checklist	Production delivery
Production/long-lived services	Observability, health checks
CPU-bound/untrusted work	Process isolation
Cache optimization	Caching patterns
Node/TypeScript, Python, or database work	Node, Python, database, respectively
ML deployment, RAG/LLM integration, or mobile APIs	ML serving, LLM integration, mobile API, respectively
Auth/input/security policy	`cxc-dev-security`
Deployment, analytics, frontend contracts, testing, RCA, or scaffolding	Handoff owners

Read api-design.md + anti-slop-backend.md first, then the relevant stack file. For C2 ordinary slices, crud-api.md alone suffices; read api-design.md/architecture.md for new API styles or C3+ work.

3. Error Handling

For error mapping and the conditional Result pattern, read Error handling.

Bundled files

The model reads these on demand while the skill is loaded. They are exposed as readable files and are never executed.

Frequently asked questions

What does the Cxc Dev Backend AI skill do?

Use for APIs, servers and app databases. Triggers: REST, GraphQL, migration, query optimization, middleware, caching, queues, 백엔드, API 작업, 마이그레이션, 쿼리 최적화.

Why use Cxc Dev Backend on TypingMind?

Because you install it once and use it with any model. Cxc Dev Backend is plain Markdown rather than provider-specific code, so the same skill runs on GPT-5, Claude, Gemini, Grok, or a local model — and you can switch model mid-chat without it breaking. TypingMind runs on your own API keys, so you pay providers directly instead of a per-seat subscription, and your skills and chats stay in your own storage.

How do I install Cxc Dev Backend in TypingMind?

Open Plugins → Skills → Install from GitHub in TypingMind and paste https://github.com/lidge-jun/codexclaw/tree/main/plugins/codexclaw/skills/dev-backend. TypingMind reads its SKILL.md and bundles its files and installs it as a skill you can enable per chat.

Which AI models can use Cxc Dev Backend?

Any model you connect in TypingMind. AI skills are plain Markdown instructions rather than provider-specific code, so GPT, Claude, Gemini, Grok, and local models can all load this skill when a request matches it.

How many AI models can I use with Cxc Dev Backend?

As many as you like. As long as a model supports skills, you can use Cxc Dev Backend with it — GPT, Claude, Gemini, Grok, DeepSeek, Mistral, Llama and more — all on TypingMind with your own API keys.

Is the Cxc Dev Backend AI skill free?

Yes. It is published on GitHub by lidge-jun under the MIT license. You only pay your own AI provider for the tokens you use.

What are AI skills?

An AI skill is a reusable instruction bundle that teaches an AI model how to do one specific task. It follows the open Agent Skills format: a SKILL.md file with a name and description, plus any scripts, templates or reference files the model may need. The model reads the instructions only when your request matches the skill, so an installed skill costs nothing until it is used.

How are AI skills different from plugins or MCP servers?

A plugin or MCP server gives a model new tools to call — code that runs somewhere and returns a result. An AI skill gives the model knowledge and process instead: how to approach a task, which steps to follow, what good output looks like. Skills are plain Markdown, so they need no server, no API key and no runtime, and they work with any model.

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Overview

Installation

Install in TypingMind

Install in another agent

Use it in TypingMind

Works with any AI model

Skill instructions

Dev-Backend — Production-Grade Backend Engineering

Modular References

3. Error Handling

Bundled files

Frequently asked questions

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