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.
npx skills add navikt/copilot --skill aksel-buildergit clone --depth 1 https://github.com/navikt/copilotWrote 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.
[](https://agentmods.dev/skills/navikt/copilot/aksel-builder)<a href="https://agentmods.dev/skills/navikt/copilot/aksel-builder"><img src="https://agentmods.dev/badge/skills/navikt/copilot/aksel-builder/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.
<a href="https://agentmods.dev/skills/navikt/copilot/aksel-builder"><img src="https://agentmods.dev/badge/skills/navikt/copilot/aksel-builder.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 1 finding, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium Prompt Injection · line 141 Large whitespace padding was detected (a block of blank lines or a long run of spaces). This can push injected instructions below or to the right of the visible area so a human reviewer never sees them while the agent still reads them. Manual review of the hidden content is recommended.Fix: Remove the large whitespace padding (blank-line blocks or long space runs) and review any content hidden below or to the right of it. Keep skill files compact and reviewable so no instructions can be
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 | $0.00089 | $0.03202 |
| Opus 5.5 | $0.00036 | $0.01281 |
| Sonnet 5.5 | $0.00018 | $0.00640 |
| Haiku 4.5 | $0.00009 | $0.00320 |
Grade A, and why
aksel-builder 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 today.
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.
How it starts
The opening of the file, as written. The whole thing — 213 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Aksel design system skill
Mission
Build correct, accessible, production-quality UI with the Aksel design system (Nav).
Lead the user to the right component, token, and primitive — and back every choice with the
Aksel MCP server, not memory. Its 5 tools and 4 resources combine cached live docs
from aksel.nav.no with token, icon, and migration catalogs bundled with the server.
Check the project's installed versions before applying newer APIs. Aim for the
fewest correct calls.
MCP-First rule (hard rule)
Never generate, edit, or debug Aksel code from training memory alone.
Aksel moves fast — token names, props, and whole components change between majors, and your weights are stale. Before writing any import, prop, token, or icon name:
- Confirm it exists and how it's used via the MCP.
- Never invent doc paths, prop names, token names, or icon exports.
- Verified sources win over memory. The MCP describes current docs and its bundled catalogs, not necessarily the project's installed version. Resolve mismatches against installed package types/exports and version-specific documentation. If no source confirms an API, say what you tried — don't fall back to a guess.
This one rule prevents the most common failure: confidently shipping an Aksel API that no longer exists.
Preflight: is the MCP available?
This skill is built around the Aksel MCP. Before your first lookup, check whether the
aksel_* tools exist, and branch:
✅ MCP available (strongly preferred). Use the tools below for structured props, token values, and icon names. They do not inspect the consuming project's dependencies: confirm version-sensitive APIs against the installed packages.
The environment must allow https://aksel-mcp.nav.no. If access is blocked, report it
and use the fallback below; don't work around access restrictions.
❌ MCP not available → recommend installing it, then fall back to fetching docs.
- Recommend the MCP. Find
io.github.navikt/aksel-mcpin Nav's registry (https://mcp-registry.nav.no) and use the client's installation flow. The endpoint ishttps://aksel-mcp.nav.no/mcp. For VS Code,.vscode/mcp.jsonuses:
What ships with it
12 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.
- metadata.json 1.4 KB
- README.md 5.9 KB
- references/accessibility.md 5.5 KB
- references/components.md 8.5 KB
- references/figma-to-code.md 6.8 KB
- references/icons.md 3.8 KB
- references/mcp-workflow.md 7.8 KB
- references/migrations.md 4.9 KB
- references/primitives-layout.md 8.9 KB
- references/setup-and-imports.md 6.6 KB
- references/theming.md 4.4 KB
- references/tokens-styling.md 11 KB
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.
- today Changed · +14 lines · -92 tokens per session 098341b233cd
- 1mo ago First seen · 199 lines · 181 tokens per session scan A 19426456c10f
aksel-builder is a skill published in the GitHub repository navikt/copilot (56 stars, last pushed today), licensed MIT. It adds 89 tokens to every session and 3,202 once invoked, about $0.0004 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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