use-topbar

use-topbar is a skill for Claude Code from cognitedata/builder-skills. It costs 89 tokens per session (1,047 once invoked), scanned A, original, Apache-2.0.

A setup guide for adding Aura Topbar, the standard top navigation bar for authenticated Flows and Fusion apps. It supports page breadcrumbs, optional tabs, utility controls, and light or dark themes.

In plain words
What is it for?
Use it when adding an app header or navigation bar to a Flows or Fusion app. It covers installation, configuration, and a prompt that reminds future sessions to follow the topbar rules.
Why use it?
It provides the required navigation structure and rules in one place, so developers do not have to design or assemble a top bar themselves.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter.

Good fit Use it when adding an app header or navigation bar to a Flows or Fusion app. It covers installation, configuration, and a prompt that reminds future sessions to follow the topbar rules.

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Install with agentmods
npx agentmods add skills/cognitedata/builder-skills/use-topbar
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 cognitedata/builder-skills --skill use-topbar
Clone the repo
git clone --depth 1 https://github.com/cognitedata/builder-skills

Made for: Claude Code.

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 use-topbar

README.md
[![agentmods](https://agentmods.dev/badge/skills/cognitedata/builder-skills/use-topbar/github.svg)](https://agentmods.dev/skills/cognitedata/builder-skills/use-topbar)
Your own site
<a href="https://agentmods.dev/skills/cognitedata/builder-skills/use-topbar"><img src="https://agentmods.dev/badge/skills/cognitedata/builder-skills/use-topbar/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.

agentmods 80×15 button for use-topbar

Your own site · 80×15
<a href="https://agentmods.dev/skills/cognitedata/builder-skills/use-topbar"><img src="https://agentmods.dev/badge/skills/cognitedata/builder-skills/use-topbar.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 89 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,047 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. Third-party audits
  • Socket pass 8 May 2026
  • Snyk warn 8 May 2026
How audits are shown
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 5.1 $0.00089 $0.01047
Opus 5 $0.00044 $0.00524
Sonnet 5 $0.00018 $0.00209
Haiku 4.5 $0.00009 $0.00105

Measured 6d ago against content hash 9bc7ebfdcd79, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

use-topbar 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 6d 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.

skills/use-topbar/SKILL.md · 91 lines

How it starts

The opening of the file, as written. The whole thing — 91 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Topbar

@aura/topbar is the single, compliant top navigation bar for every authenticated Flows/Fusion app. It is a shadcn registry component (installed via pnpm dlx shadcn@latest add @aura/topbar), not an npm package.

Non-negotiables: Exactly one Topbar per page, composed only from @aura/topbar primitives, installed via the shadcn CLI only. If installation fails, surface the blocker — never build a custom header fallback. See RULES.md §1, §11, §12.


Step 0 — Auto-prompt hook setup

Ensure the topbar interview is triggered at the start of every future Cursor session in this project.

  1. Check whether .cursor/hooks.json exists in the project root.
  2. If it does not exist, create it:
{
  "version": 1,
  "hooks": {
    "sessionStart": [
      {
        "type": "prompt",
        "prompt": "This is a Flows/Fusion application. Before implementing any UI or navigation work, read and follow the topbar skill and run the topbar configuration interview with the user."
      }
    ]
  }
}
  1. If .cursor/hooks.json already exists without a topbar sessionStart entry, merge the entry above — do not overwrite unrelated hooks.
  2. Confirm to the user, then continue.

Step 1 — Pre-flight: read the app

Before asking any questions, read:

  • package.json — package manager, existing UI deps, existing @aura/topbar
  • src/App.tsx (or main layout file) — routing, existing dark-mode hook/context
  • Flows/Fusion app config (app.config.ts, fusion.config.ts, manifest) — displayName, name, app mark / branding

Apply any found defaults and skip the corresponding interview questions. State what was inferred.


Step 2 — Configuration interview (mandatory)

Run the full Q1–Q9 interview in INTERVIEW.md before writing any implementation code. Ask one question at a time; skip only questions that Step 1 already answered definitively.

Read the full file on GitHub · 91 lines

Files

What ships with it

3 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.

  1. 6d ago Changed · -1 lines · -12 tokens per session 9bc7ebfdcd79
  2. 10d ago First seen · 92 lines · 101 tokens per session scan A 48c100e479eb

Subscribe to this mod's changes

use-topbar is a skill published in the GitHub repository cognitedata/builder-skills (6 stars, last pushed 2d ago), licensed Apache-2.0. It adds 89 tokens to every session and 1,047 once invoked, about $0.0004 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 2026-08-31.

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