fabric-variable-library

fabric-variable-library is a skill for Claude Code from wardawgmalvicious/agent-config. It costs 233 tokens per session (3,525 once invoked), scanned A, original, MIT.

Guidelines for using Microsoft Fabric Variable Library, a configuration store for values that change between environments.

In plain words
What is it for?
Parameterizing Fabric notebooks and pipelines with text, numbers, dates, true-or-false values, and references to Fabric items.
Why use it?
They help define valid variables and environment-specific value sets without sending unsupported definition fields.

Skill for Claude Code

Written for Claude Code: disable-model-invocation in frontmatter. Also seen: model in frontmatter.

Good fit Parameterizing Fabric notebooks and pipelines with text, numbers, dates, true-or-false values, and references to Fabric items.

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Install with agentmods
npx agentmods add skills/wardawgmalvicious/agent-config/fabric-variable-library
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 wardawgmalvicious/agent-config --skill fabric-variable-library
Clone the repo
git clone --depth 1 https://github.com/wardawgmalvicious/agent-config

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 fabric-variable-library

README.md
[![agentmods](https://agentmods.dev/badge/skills/wardawgmalvicious/agent-config/fabric-variable-library.svg)](https://agentmods.dev/skills/wardawgmalvicious/agent-config/fabric-variable-library)
Your own site
<a href="https://agentmods.dev/skills/wardawgmalvicious/agent-config/fabric-variable-library"><img src="https://agentmods.dev/badge/skills/wardawgmalvicious/agent-config/fabric-variable-library.svg" alt="Measured on agentmods" height="20"></a>
Per session 233 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,525 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00233 $0.03525
Opus 5 $0.00117 $0.01762
Sonnet 5 $0.00047 $0.00705
Haiku 4.5 $0.00023 $0.00352

Measured 3d ago against content hash 8acaa814c8a4, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

fabric-variable-library 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 3d 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/fabric/fabric-variable-library/SKILL.md · 285 lines

How it starts

The opening of the file, as written. The whole thing — 285 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Fabric Variable Library

Config-as-code for parameterizing notebooks and pipelines per environment. Stored as a Fabric item with definition parts under source control; consumed at runtime via notebookutils.variableLibrary (notebooks) or the libraryVariables block (pipelines).

Definition parts

Part Path Content Required
variables.json Variable names, types, default values Yes
settings.json valueSetsOrder (empty array when no Value Sets) Yes
valueSets/<name>.json Per-environment overrides Only when using Value Sets
.platform Item metadata JSON No (handled by Git/REST layer)

Critical: VariableLibrary does NOT support the format field in definition requests. Omit it entirely — including "format": null may cause errors. (See fabric-rest-api skill for the definition envelope.)

Supported variable types

Type Tier Description
String Basic Text
Boolean Basic true / false (stored as a string!)
Number Basic Floating-point. Not supported in pipelines
Integer Basic Whole numbers
DateTime Basic ISO 8601
Guid Basic GUID
ItemReference Advanced Fabric item binding ({itemId, workspaceId})
ConnectionReference Advanced External connection (Snowflake, Azure SQL, …) by ID, so items reference it without embedded credentials; exposes .connectionId

variables.json

{
  "$schema": "https://developer.microsoft.com/json-schemas/fabric/item/variableLibrary/definition/variables/1.0.0/schema.json",
  "variables": [
    { "name": "lakehouse_name", "type": "String", "value": "bronze_lakehouse" },
    { "name": "enable_logging", "type": "Boolean", "value": "true" },
    { "name": "target_warehouse", "type": "ItemReference",
      "value": { "itemId": "...", "workspaceId": "..." } }
  ]
}

settings.json + Value Sets

settings.json is always present. valueSetsOrder is an empty array when no Value Sets are used:

Read the full file on GitHub · 285 lines

Files

What ships with it

1 file 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. 3d ago Changed · +69 lines · -3 tokens per session 8acaa814c8a4
  2. 7d ago First seen · 216 lines · 236 tokens per session scan A e09dd93c4aa0

Subscribe to this mod's changes

fabric-variable-library is a skill published in the GitHub repository wardawgmalvicious/agent-config (1 stars, last pushed 3d ago), licensed MIT. It adds 233 tokens to every session and 3,525 once invoked, about $0.0012 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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