What is senior-fullstack?

A full-stack development guide for building web applications across the user interface, server, and deployment setup. It covers architecture, data models, APIs, tests, and deployment checks.

Scaffolding projects, building full-stack applications, choosing an architecture and data model, connecting APIs to the interface, adding tests, and analyzing code quality.

It helps coordinate decisions across the parts of an application that must work together. It also provides a structured way to define scope and review code quality.

senior-fullstack — Skill for Claude Code and Codex by vadimcomanescu

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 vadimcomanescu/codex-skills --skill senior-fullstack

Clone the repo

git clone --depth 1 https://github.com/vadimcomanescu/codex-skills

Made for: Claude Code, Codex.

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/vadimcomanescu/codex-skills/senior-fullstack/github.svg)](https://agentmods.dev/skills/vadimcomanescu/codex-skills/senior-fullstack)

Your own site

<a href="https://agentmods.dev/skills/vadimcomanescu/codex-skills/senior-fullstack"><img src="https://agentmods.dev/badge/skills/vadimcomanescu/codex-skills/senior-fullstack/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/vadimcomanescu/codex-skills/senior-fullstack"><img src="https://agentmods.dev/badge/skills/vadimcomanescu/codex-skills/senior-fullstack.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 44 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 194 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.

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.

Model	Per session	Once invoked
Fable 5.1	$0.00044	$0.00194
Opus 5.5	$0.00018	$0.00078
Sonnet 5.5	$0.00009	$0.00039
Haiku 4.5	$0.00004	$0.00019

Measured 1mo ago against content hash e8b316e8eef7, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

senior-fullstack 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 1mo ago.

The scan reads SKILL.md. This mod also ships 3 executable files (scripts/code_quality_analyzer.py, scripts/fullstack_scaffolder.py, scripts/project_scaffolder.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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/.experimental/platform/senior-fullstack/SKILL.md · 27 lines

What it actually says

Senior Fullstack

Coordinate frontend, backend, and infrastructure decisions with clear trade-offs.

Quick Start

Scaffold project: scripts/project_scaffolder.py
Scaffold full-stack app: scripts/fullstack_scaffolder.py
Analyze quality: scripts/code_quality_analyzer.py

Workflow

Define requirements and non-goals.
Choose architecture and data model.
Implement API + UI integration.
Add tests and deployment checks.

References

Tech stack guide: references/tech_stack_guide.md
Architecture patterns: references/architecture_patterns.md
Development workflows: references/development_workflows.md
Extended examples: references/examples.md

Files

What ships with it

8 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.

1mo ago First seen · 27 lines · 44 tokens per session scan A e8b316e8eef7

Subscribe to this mod's changes

senior-fullstack is a skill published in the GitHub repository vadimcomanescu/codex-skills (25 stars, last pushed 9mo ago), licensed MIT. It adds 44 tokens to every session and 194 once invoked, about $0.0002 per session on Opus 5.5. 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.

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