start9-frontend

start9-frontend is a skill for Claude Code, Codex from Start9Labs/start-technologies. It costs 129 tokens per session (2,997 once invoked), scanned A, original, MIT.

A set of house rules for building Angular web interfaces with Taiga UI, a library of ready-made interface components. Angular is a framework for web applications, and the rules cover areas such as components, styling, forms, routing, and application state.

In plain words
What is it for?
Use it before writing or reviewing frontend code for Start9 applications, including components, templates, CSS, dialogs, notifications, routes, and data flow.
Why use it?
It helps developers produce interfaces that follow Start9's established patterns and avoid incorrect or outdated Taiga UI usage.

Skill for Claude CodeCodex

About the project

Start Technologies is a monorepo, meaning one repository containing the source for several related products, including StartOS, StartWRT, StartTunnel, developer tools, and shared libraries. Its products support personal servers, routers, VPN or forwarding, service packaging, registries, and related self-hosting tasks, with shared Rust and Angular code. Catalogue add-ons support development across this product repository.

Start9Labs/start-technologies · 1,981 stars · on GitHub

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.

agentmods
npx agentmods add skills/start9labs/start-technologies/start9-frontend
Any agent
npx skills add Start9Labs/start-technologies --skill start9-frontend
Clone the repo
git clone --depth 1 https://github.com/Start9Labs/start-technologies

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.

agentmods badge for start9-frontend

README.md
[![agentmods](https://agentmods.dev/badge/skills/start9labs/start-technologies/start9-frontend.svg)](https://agentmods.dev/skills/start9labs/start-technologies/start9-frontend)
Your own site
<a href="https://agentmods.dev/skills/start9labs/start-technologies/start9-frontend"><img src="https://agentmods.dev/badge/skills/start9labs/start-technologies/start9-frontend.svg" alt="Measured on agentmods" height="20"></a>
Per session 129 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,997 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00129 $0.02997
Opus 5 $0.00064 $0.01499
Sonnet 5 $0.00026 $0.00599
Haiku 4.5 $0.00013 $0.00300

Measured 5d ago against content hash f7c32fbb5da6, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

start9-frontend 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 5d 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.

.claude/skills/start9-frontend/SKILL.md · 149 lines

How it starts

The opening of the file, as written. The whole thing — 149 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Start9 Frontend — Angular + Taiga UI house style

Canonical for every Start9 web UI, distilled from the fleet's codebases and from the refactor and review history that shaped them. Follow it and new code matches the fleet; deviate and expect it to be rewritten in review.

Authority order: Taiga UI docs > this skill > neighboring code. The codebases are mid-migration — "matches existing repo patterns" is not a quality bar; old code is often exactly what this skill exists to eliminate. Never guess a Taiga API: verify against the taiga-ui-mcp MCP server or https://taiga-ui.dev/llms-full.txt.

Reference files (read on demand — don't preload)

File Read when
references/bootstrap.md creating/touching app.config, main.ts, angular.json, icons, theming, or a new app/repo
references/components.md writing any component or template (selectors, hostDirectives, signal APIs, control flow)
references/styling.md about to write ANY CSS (the escalation ladder, breakpoints, tokens)
references/di.md providers, tokens, inject patterns
references/state.md services, data flow, loading/error UX, API/RPC integration
references/forms.md any form, validation, or submit flow
references/overlays.md dialogs, confirms, toasts, dropdowns, hints, drawers
references/routing.md route files, guards, navigation, URL state
references/conventions.md i18n strings, file naming, folder structure, import order
references/shared-libs.md before writing ANY utility/component in monorepo apps — it may exist in @start9labs/shared or marketplace
references/antipatterns.md reviewing code, refactoring, or upgrading Angular/Taiga (before→after catalog + verbatim review quotes)
references/taiga.md unsure of a Taiga 5 API; v4→v5 renames; need→primitive lookup table
references/recipes.md step-by-step: new page, dialog, form, table, control component, endpoint
references/repos.md repo-specific rules and build/verify commands

Read the full file on GitHub · 149 lines

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. 5d ago First seen · 149 lines · 129 tokens per session scan A f7c32fbb5da6

Subscribe to this mod's changes

start9-frontend is a skill published in the GitHub repository Start9Labs/start-technologies (1,981 stars, last pushed today), licensed MIT. It adds 129 tokens to every session and 2,997 once invoked, about $0.0006 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.