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senior-fullstack · sickn33 — Claude Code skill: full-stack coordination

This skill guides implementation of features spanning interface, backend, database and deployment. It verifies coherence from request through authorization to data access and response handling.

Install into Claude Code · Skills CLI (Vercel) All methods and platforms ↓ 
npx skills add sickn33/agentic-awesome-skills --skill senior-fullstack -a claude-code
Open on GitHub

What senior-fullstack does

Use senior-fullstack when building features that cross layer boundaries: browser, service, storage. The skill starts by inspecting your actual stack, build commands and conventions, then traces a single user journey: interface state change, API request, authorization, data access, response handling.

The workflow splits work into stages: define the request/response contract, permission checks, input validation and failure modes; implement the smallest coherent slice using existing dependencies; run the project's own checks—unit tests for rules, integration tests for permissions and persistence, browser tests for the complete journey. Then prepare migration, rollback and release plans.

Example: add a billing settings page. Inspect the existing billing integration and account permissions, define the settings API, implement loading/empty/error states, test that one account cannot modify another's settings. Keep provider writes and migrations separate from local implementation; do not spin up a paid subscription just to test the UI.

What it helps with

  • verify feature coherence from UI through database to response
  • define API contracts and access permissions before coding
  • separate domain logic, persistence and presentation correctly
  • prepare migration and rollback plans for production
  • run checks for changed behavior across layers

Example prompts for the agent

  • Add a billing settings page where users can change payment method
  • Implement full-stack: from UI filter through API request to result caching
  • Review the notification system end-to-end: how does a request flow from client through database to email

How to install senior-fullstack

1Skills CLI (Vercel)

npx skills add sickn33/agentic-awesome-skills --skill senior-fullstack -a claude-code

2Manually: put the files in place

~/.claude/skills/senior-fullstack/SKILL.md

Copy the whole skill folder; for one project use .claude/skills/senior-fullstack/

From the same set80

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docker-expert sickn33 A skill that turns your AI agent into a Docker reviewer for Dockerfiles, multi-stage builds and container security. Useful when images and Compose files need a second look. Claude Code CX Codex Cursor +1 27,200installs typescript-expert sickn33 A skill for TypeScript and JavaScript work: it reads your project setup, fixes type errors and speeds up type checking. Useful once a TS codebase gets big. Claude Code CX Codex Cursor +1 12,600installs browser-automation sickn33 This skill builds browser checks around observed UI state and explicit outcomes. Use it for UI workflows, timing failures, or authorised page-data collection. Claude Code CX Codex Cursor +1 6,700installs nextjs-supabase-auth sickn33 This skill wires Supabase Auth into the Next.js App Router with clients, middleware, OAuth callbacks, and Server Actions. Use it when you need protected routes and session handling. Claude Code CX Codex Cursor +1 6,500installs 3d-web-experience sickn33 Helps build and debug web 3D scenes, product configurators, and portfolios. Covers stack choice, model loading, scroll interaction, and performance checks. Claude Code CX Codex Cursor +1 5,200installs prisma-expert sickn33 This skill helps inspect Prisma schemas, migrations, and queries. Use it to investigate an error or review database changes before deployment. Claude Code CX Codex Cursor +1 4,200installs playwright-skill sickn33 Write and run Playwright browser tests directly in Claude Code: responsive design checks, login flows, form submissions, screenshots. Executes locally via Node with a visible browser window. Claude Code CX Codex Cursor +1 3,900installs game-development sickn33 Guides game architecture decisions, platform choices, and core loop structure. Directs the assistant to specialized sub-skills for web, mobile, PC, or VR. Claude Code CX Codex Cursor +1 3,800installs

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Questions about senior-fullstack

How do I install senior-fullstack in Claude Code?

Run npx skills add sickn33/agentic-awesome-skills --skill senior-fullstack -a claude-code, then find the skill at ~/.claude/skills/senior-fullstack/SKILL.md.

What does senior-fullstack do?

It guides implementation of features crossing layer boundaries: UI, backend, database. It verifies API contracts, access permissions, input validation and migrations; runs unit, integration and browser tests.

What are the limitations?

Stack and provider compatibility must be verified in your actual project. The references are review checklists, not application templates. Passing tests does not guarantee security or deployment readiness.

Source text

SKILL.md · MIT 
---
name: senior-fullstack
description: "Coordinate full-stack implementation across interface, service, database and delivery boundaries using the existing project stack and verified checks."
risk: critical
source: community
date_added: "2026-02-27"
---

# Full-Stack Implementation Review

## When to Use

Use when a feature spans the browser, backend service and database, or when reviewing an existing full-stack implementation for integration gaps.

## Workflow

1. Inspect the project's actual stack, build commands and conventions. Trace one user journey through interface state, API request, authorization, data access and response handling.
2. Define the request/response contract, permission checks, input validation and failure states before changing code. Keep database migrations and external side effects explicit.
3. Implement the smallest coherent slice using existing dependencies. Separate interface presentation, domain logic and persistence; use parameterized queries and server-side authorization.
4. Run project-owned checks for the changed behavior: unit tests for rules, integration tests for permissions and persistence, and browser tests for the complete journey. Record which checks actually ran and any missing environments.
5. Prepare a migration, rollback and release plan where needed. Dependency installation, destructive data changes, external notifications and deployments require authorization appropriate to that action.

## Example

User: "Add a billing settings page."

Assistant: Inspect the existing billing integration and account permissions, define the settings API, implement loading/empty/error states, and test that one account cannot modify another account's settings. Prepare provider writes and deployment separately from local implementation; do not create a paid subscription merely to test the interface.

## Bundled references

- [Stack inspection checklist](references/tech_stack_guide.md)
- [Boundary and contract review](references/architecture_patterns.md)
- [Implementation and verification workflow](references/development_workflows.md)

## Helper status

The three retained Python helpers are unimplemented historical skeletons. They intentionally fail with a nonzero exit and do not scaffold, analyze quality or certify a project. Use the project's real tools; do not report an empty findings list as a clean audit. No executable installation or production deployment is supplied by this skill.

## Limitations

- Stack and provider compatibility must be checked in the actual project.
- The references are review checklists, not complete application templates.
- Passing a subset of tests does not prove security, performance or deployment readiness.
- Do not infer permission to change accounts, billing or production resources from a request for a code review.

© sickn33 · MIT · sickn33/agentic-awesome-skills

See also

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