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The Agent Skills Stack That Replaces Vibe Coding with Structured Engineering

Agent Development: Recommended Mainstream Skills

Starting from SSD specification-driven development, this article inventories the most worthwhile Agent Skills to install in 2025-2026, and finally focuses on practical combinations for Next.js backend development.

1. SSD Specification-Driven Development

The core idea of implementing Specification-Driven Development (SSD) in Claude Code is to constrain the free exploration of "vibe coding" into a structured process. Instead of manually stuffing rule files into the prompt each time, you configure Claude Code's project files so that it automatically loads these "hard specifications."

⚙️ Step 1: Load "Hard Specifications" with CLAUDE.md

CLAUDE.md is a Markdown file in the project root directory that is automatically loaded at the start of every session and remains effective throughout the entire session, even if the conversation is compressed.

Step 2: Apply the SSD Workflow with Skills

But CLAUDE.md only makes the AI obey rules. To truly implement the complete SSD process (Specification → Plan → Code), you need Skills. Skills are essentially instruction files that define specific workflows and are loaded on demand.

You can also install mature community SSD frameworks to get a whole set of slash commands:

Differences between CLAUDE.md and the .claude/ Directory

Many beginners easily confuse these two concepts:

CLAUDE.md .claude/ directory
What it is A single file in the project root directory A hidden folder containing multiple configuration files
Purpose Project-level "always-on" conventions Stores structured configurations like Skills, custom slash commands
Loading timing Automatically loaded at the start of each session, effective throughout Skills loaded on demand, slash commands triggered with /command
Analogy The Agent's "employee handbook," must-read every workday The Agent's "toolbox," grab the corresponding tool when needed

Relationship between Skills and SSD Frameworks

Dimension Skills SSD Framework
Essence Independent, atomic functional modules Ordered combination of multiple Skills + process management
Responsibility Execute a single specific task (e.g., "write specs," "review code") Define the complete workflow of "Specification → Plan → Code"
Flexibility Can be used alone or combined freely Process is relatively fixed, but underlying Skills can be swapped within the framework
Dependencies Does not depend on any framework Depends on specific Skills to execute concrete steps
Analogy Individual kitchen tools (chef's knife, frying pan) A complete recipe (steps + tool combinations)

The same Skill can be reused by different frameworks. For example, the brainstorming Skill might be used by both Superpowers and other frameworks, only differing in the timing of invocation and the logic of preceding and succeeding steps.

File Structure After Installation

After installation, Skills are stored in the project in SKILL.md format:

your-project/
├── CLAUDE.md                  ← Always-on project conventions
├── .claude/                   ← Claude Code configuration directory
│   ├── skills/                ← Skills automatically installed here
│   │   ├── brainstorming/
│   │   │   └── SKILL.md
│   │   ├── writing-plans/
│   │   │   └── SKILL.md
│   │   └── code-review/
│   │       └── SKILL.md
│   └── commands/              ← Custom slash commands
│       ├── commit.md          ← /commit
│       └── review.md          ← /review
├── .cursor/                   ← Same for Cursor
│   └── skills/
└── ...

Key points:

2. Recommended Mainstream Skills

🔧 General Engineering Workflow (Almost Essential)

1. Superpowers (obra/superpowers)

Maintained by obra, this is currently the community's most mature Agent engineering workflow framework. It is not a single Skill but breaks down a whole set of software engineering methodologies into 6 interconnected Skills:

Phase Skill What it does
1 brainstorming Turns vague ideas into structured product requirements, outputs a PRD
2 writing-plans Generates a technical plan based on the PRD: architecture diagrams, data flow, step-by-step implementation plan
3 test-driven-development Write tests first, then implementation, ensuring every line of code is covered by tests
4 debugging Scientific debugging: hypothesis → instrumentation → reproduction → analysis → fix → verification
5 code-review Reviews code across three dimensions: bugs / security / style
6 verification Final check: verifies implementation matches the plan, tests pass, nothing is missed

Its killer feature is Sub-Agent parallelism: complex tasks can be automatically decomposed, launching multiple sub-agents simultaneously to advance different Skill phases in parallel, drastically reducing development time.

# Claude Code
/plugin marketplace add obra/superpowers-marketplace
/plugin install superpowers@superpowers-marketplace

# Universal (supports both Cursor/Claude Code)
npx skills add https://github.com/obra/superpowers -g -a cursor -a claude-code -y

Claude Code users should prioritize this; Cursor users can also install it, but there's no need to duplicate the homologous systematic-debugging and test-driven-development.

2. spec-driven (tlc-spec-driven)

tlc-spec-driven is a project-level workflow specifically designed for "specification-driven development." Its core value lies in treating requirements and design documents as first-class citizens, not just intermediate artifacts to be discarded after writing.

Four-phase process:

Specify
  ↓   Fuzzy requirements → Structured Spec document (user stories, acceptance criteria, edge cases)
Design
  ↓   Data model design, API contract definition, authentication/authorization scheme, technology selection
Tasks
  ↓   Decompose the design into an atomic task list; each task is independent, verifiable, with clear completion criteria
Implement
  ↓   Execute tasks one by one → verify completion criteria → move to the next task

Compared to traditional development, its unique advantages:

npx @tech-leads-club/agent-skills install -s tlc-spec-driven -a claude-code

The golden combination of the two: Superpowers manages "how to write" (engineering methods), spec-driven manages "what to write" (transformation from requirements to tasks). Installing both together provides a complete specification-driven development experience.

3. Built-in / Classic Slash Level (Built into Claude Code or Installable Separately)

These are "daily-use" commands. It's recommended to become proficient with the built-in ones first before considering overriding them with custom versions:

Command Function
/commit Generates a conventional commit based on staged changes
/create-pr Reads the diff, writes a PR description, and pushes
/review Code review (bugs / security / style)
/security-audit Deep security audit (OWASP Top 10 oriented)
/test Generates unit tests based on implementation
/architect Does system design based on requirements before writing code
/refactor Refactoring with a specific goal

Custom slash commands: Create .claude/commands/*.md in the project root directory; the filename is the /command, and the content is the prompt.

🎨 Frontend / Design Oriented

4. frontend-design (Anthropic Official)

Specifically addresses the problem of AI-generated pages looking "cookie-cutter"—enforces bold typography + unconventional layouts to avoid generic UI.

5. taste-skill (Leonxlnx/taste-skill)

A collection of 13. The most useful for frontend are design-taste-frontend (enforces design specifications) + minimalist-skill + output-skill (enforces complete, runnable code, no placeholders). Also includes imagegen-frontend-web/mobile, brandkit, moodboard for visual assets.

# Install all 13
npx skills add https://github.com/Leonxlnx/taste-skill

# Or install only the core ones
npx skills add https://github.com/Leonxlnx/taste-skill --skill design-taste-frontend

6. ui-ux-pro-max (nextlevelbuilder)

Input "make an SPA landing page," and it will reason about industry → color scheme → typography → anti-pattern prompts, and provide a checklist before delivery (details like emojis shouldn't be used as icons, hover states must be complete).

🛡️ Security Oriented

7. Anthropic Cybersecurity Skills (mukul975/Anthropic-Cybersecurity-Skills)

817 security skills covering threat intelligence / vulnerability management / penetration testing / incident response / compliance auditing / cloud security / AI security. Each skill maps to six major frameworks: MITRE ATT&CK, NIST CSF 2.0, D3FEND, NIST AI RMF, MITRE F3, MITRE ATLAS.

npx skills add mukul975/Anthropic-Cybersecurity-Skills

After installation, just tell the Agent: "Detect lateral movement (T1021.001, T1570) over the past 7 days according to MITRE ATT&CK", and it will automatically load the corresponding SKILL.md and execute step by step.

8. Trail of Bits (Produced by a real security company)

CodeQL + Semgrep + audit workflow, Verified level.

🔬 Scientific Research Oriented

9. Scientific Agent Skills (K-Dense-AI/scientific-agent-skills)

138 scientific research skills across 17 domains (genomics / drug discovery / clinical variants / single-cell RNA-seq, etc.), directly connected to 100+ databases (PubChem, ChEMBL, UniProt…), integrating 70+ Python packages (RDKit, Scanpy, BioPython, OpenMM).

npx skills add K-Dense-AI/scientific-agent-skills

🔌 Vertical Tool Oriented (Mainly Cursor Marketplace)

These are not standard SKILL.md packages but Cursor Plugin / MCP forms, with similar effects—making the Agent understand a specific vertical tool:

📦 Installation Quick Reference

Carrier Path / Command
Claude Code built-in slash .claude/commands/*.md, filename is the /command
Claude Code npx install third-party npx skills add <repo> or /plugin marketplace add
Cursor .cursor/skills/*.md or one-click install from Cursor Marketplace
Universal (cross-Agent) Follows the SKILL.md standard; write once, usable by Cursor/Claude Code/Codex/Gemini CLI

🎯 Recommended Combination for Beginners

If you are installing for the first time, this "starter pack" is suggested as sufficient:

superpowers        (Engineering workflow skeleton — manages "how to write")
spec-driven        (Project-level requirements → implementation — manages "what to write")
frontend-design    (When doing frontend)
/security-audit    (Security oriented)

3. Common Skills for Next.js Backend Development

The core idea for Next.js backend development (API Routes, Server Actions, Server Components, Middleware): A two-pronged approach of CLAUDE.md project-level conventions + Skills workflows.

📋 Recommended CLAUDE.md Configuration Template

Create CLAUDE.md in the project root directory:

# Tech Stack
- Framework: Next.js 14+ (App Router)
- Language: TypeScript strict mode
- ORM: Prisma (or Drizzle)
- Auth: Auth.js v5
- Validation: Zod
- API Style: Mix of Server Actions + Route Handlers

# Coding Standards
- All async functions must use try-catch or error boundaries
- API Route return values must uniformly use NextResponse
- Server Actions use the "use server" directive, declared at the top of the file
- Database queries must be placed in the service layer, never write raw queries directly in components / routes
- All user input must be validated by a Zod schema before entering business logic

# Project Structure
src/
  app/
    api/          → Route Handlers (RESTful style)
    (routes)/     → Page routes + Server Components
  server/
    actions/      → Server Actions
    services/     → Business logic layer (database queries, etc.)
    schemas/      → Zod validation schemas
  lib/
    db.ts         → Prisma client singleton
    auth.ts       → Auth.js configuration

Recommended Solutions for Each Link

Link Recommendation Explanation
Engineering Skeleton superpowers + spec-driven spec-driven's Design phase is naturally suited for designing DB schemas and API structures
Database ORM CLAUDE.md conventions Specify the ORM choice in CLAUDE.md; the Agent generates type-safe queries and migrations according to the convention
Authentication & Authorization Auth.js v5 + CLAUDE.md Configure OAuth, session management, middleware route protection
Input Validation Zod Skill Unify validation schema style; all user input must be validated
Type-safe API tRPC Skill (optional) Define routers / procedures, automatically infer frontend call types
AI/LLM Integration Vercel AI SDK Streaming responses, Tool calling, useChat / useCompletion
Deployment & Operations Vercel Deployment Skill Edge Functions, ISR, environment variables, custom domains

🎯 Final Combination for Next.js Backend

superpowers              (Engineering workflow skeleton)
spec-driven              (Requirements → Design → Implementation)
CLAUDE.md tech stack conventions      (Architectural constraints + code style)
Zod Skill                (Input validation)
Vercel AI SDK            (If LLM integration is needed)

4. Summary

  1. SSD is the direction: Specification-driven development transforms AI coding from "going by feel" to "following a process." CLAUDE.md is the first step for implementation, Skills are the lever, and SSD frameworks are the complete solution.
  2. CLAUDE.md ≠ .claude/ directory: The former manages "rules" (always-on project conventions), the latter manages "capabilities" (on-demand Skills and commands). Only by pairing both can maximum effectiveness be achieved.
  3. Superpowers + spec-driven is the golden combination: One manages engineering methodology (how to write), the other manages the transformation from requirements to tasks (what to write). Installing both together covers the complete process from idea to delivery.
  4. Skills are an open standard: All Skills are essentially SKILL.md files under the project directory, following a unified standard. Write once, reuse across Agents.
  5. Next.js backend relies on conventions, not piling on: Writing good tech stack and project structure conventions in CLAUDE.md, combined with the superpowers + spec-driven workflow, is more effective than blindly installing a pile of Skills.

This article is compiled based on active community projects from 2025-2026. The Skills ecosystem iterates very quickly; it is recommended to continuously monitor the latest developments in each project repository.