skills.rest
usurobor
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missing-required-no-exception

Reject YAML frontmatter fixtures missing required fields without exception entries.

8|Updated Feb 2, 2026
Search Tags:#testing#schema#yaml#fixtures#error-handling#validate#frontmatter
One-click install
npx skills add https://github.com/usurobor/cnos --skill missing-required-no-exception
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: missing-required-no-exception
Source: https://github.com/usurobor/cnos/tree/main/schemas/fixtures/skill-frontmatter/invalid/missing-required-no-exception
Command: npx skills add https://github.com/usurobor/cnos --skill missing-required-no-exception

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Missing required fields in YAML frontmatter with no exception backing should result in a deterministic failure during skill validation.

Core Features & Use Cases

  • Strict frontmatter validation: Enforces presence of mandatory keys in YAML frontmatter for skills.
  • Negative test fixture: Provides fixtures to ensure missing fields are rejected when there is no exception mapping.
  • Deterministic error signaling: Produces consistent failure messages for CI tests and documentation.

Quick Start

Provide a frontmatter snippet that omits a required field to observe the validation failure.

Frequently Asked Questions about missing-required-no-exception

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I validate required fields in YAML frontmatter without triggering exceptions?▼

YAML frontmatter validation can strictly enforce required keys and deterministically reject missing fields without relying on exception mappings. This ensures consistent failure signaling for CI tests and fixture suites.

What happens when a required field is missing from frontmatter and no exception entry exists?▼

Missing required fields in YAML frontmatter without exception backing produce a deterministic validation failure. The strict error signaling mechanism ensures consistent rejection messages across schema-driven fixture suites.

How do I set up a negative test fixture for missing frontmatter validation?▼

Provide a YAML frontmatter snippet that omits a required field to observe the validation failure. This negative test fixture approach verifies missing fields are rejected when no exception mapping exists.

Can I use this approach for schema-driven validation across multiple fixture suites?▼

Schema-driven frontmatter validation applies across fixture suites by enforcing YAML parsing, required-key detection, and strict error signaling. It ensures deterministic failure behavior for missing fields throughout your test infrastructure.

Why does my frontmatter validation pass when a required field is missing?▼

Frontmatter validation may pass incorrectly if an exception entry exists for the missing field. Without exception backing, the validation should deterministically fail and produce consistent error messages for the omitted required key.

Does YAML frontmatter validation work for CI pipeline error signaling?▼

YAML frontmatter validation produces deterministic error signaling suitable for CI tests. Strict validation of required keys ensures consistent failure messages that integrate with automated documentation and testing workflows.

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