What is fusion-skills skills-authoring.instructions.md?

Repository guidance for writing and maintaining skills, which are reusable instructions for coding agents.

Creating or modifying files in a repository's skills directories.

It keeps new or changed skills consistent with the repository's naming, location, and validation rules.

How equinor/fusion-skills configures GitHub Copilot

Reuse

Borrowing it

Nothing to install: this file belongs to equinor/fusion-skills. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/equinor/fusion-skills/main/.github/instructions/skills-authoring.instructions.md

Clone the repo

git clone --depth 1 https://github.com/equinor/fusion-skills

Made for: GitHub Copilot.

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/instructions/equinor/fusion-skills/skills-authoring/github.svg)](https://agentmods.dev/instructions/equinor/fusion-skills/skills-authoring)

Your own site

<a href="https://agentmods.dev/instructions/equinor/fusion-skills/skills-authoring"><img src="https://agentmods.dev/badge/instructions/equinor/fusion-skills/skills-authoring/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/instructions/equinor/fusion-skills/skills-authoring"><img src="https://agentmods.dev/badge/instructions/equinor/fusion-skills/skills-authoring.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 1,126 This file is loaded in full into every session.

When invoked 1,126 The same file — it is already loaded in full.

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	$0.01126	$0.01126
Opus 5	$0.00563	$0.00563
Sonnet 5	$0.00225	$0.00225
Haiku 4.5	$0.00113	$0.00113

Measured 10d ago against content hash f1fe97a9e0a9, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

fusion-skills skills-authoring.instructions.md 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 10d 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.

.github/instructions/skills-authoring.instructions.md · 117 lines

How it starts

The opening of the file, as written. The whole thing — 117 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Skills authoring instructions (repo overrides)

Apply when creating or modifying skills/**. This file intentionally keeps only repository-specific overrides. Naming, ownership, release, validation, local-example rules grouped below. Use skills/fusion-skill-authoring/SKILL.md as the canonical authoring workflow.

Precedence

Use skills/fusion-skill-authoring/SKILL.md for end-to-end skill authoring workflow and behavior.
Where any rule in that file conflicts with a rule in this file, this file's rule takes precedence for this repository.

Repository overrides

Portable default naming: custom-<base-skill-name>. Override with rules below.
Prefix defaults:
- internal repository-owned skills: fusion-
- external/user-created skills: custom-
Placement defaults:
- use skills/ for active repository-managed skills
- use skills/.experimental/ for preview, in-development, or not-yet-curated skills
- use skills/.curated/ only when a skill is intentionally being placed in the curated lane
- use skills/.system/ only for internal/system skills and shared building blocks
- use skills/.deprecated/ for skills that have been superseded and are pending removal
Before creating, check skills/, skills/.experimental/, and skills/.curated/; check skills/.system/ for building blocks. skills/.deprecated/ scanned by CI but not for new work.
Initial version default for new skills in this repository: "0.0.0".
Ownership metadata (required):
- metadata.owner: Primary accountable maintainer (GitHub identity: @user or @org/team). Use repository team @equinor/fusion-core as default.
- metadata.status: Lifecycle state of the skill. Must be one of: active, experimental, deprecated, archived. Use active for stable production skills, experimental for new/unstable skills.
- metadata.sponsor (optional): Secondary owner or team providing backup accountability.
Never manually edit generated release artifacts:
- root README.md
- root CHANGELOG.md
- any skills/**/CHANGELOG.md

Read the full file on GitHub · 117 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.

10d ago First seen · 117 lines · 1,126 tokens per session scan A f1fe97a9e0a9

Subscribe to this mod's changes

fusion-skills skills-authoring.instructions.md is an instructions file published in the GitHub repository equinor/fusion-skills (1 stars, last pushed yesterday), licensed MIT. It adds 1,126 tokens to every session, about $0.0056 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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fusion-skills: Instructions file for GitHub Copilot