formspec-companion-authoring

A Formspec companion spec is an add-on specification extending the Formspec core ecosystem. You need to author one when drafting additive invariants, schema guides, or cross-references requiring strict alignment with core conventions and style guidelines.

To ensure frontmatter conformance in specification documentation, enforce presence of identity fields, structured description sections, metadata dependencies, components, and keywords. This enables tooling validation and strict schema conformance across your docs.

To check external specification alignment with Formspec, review the document against core style guides, verify frontmatter requirements, and validate additive invariants and schema references for governance-ready outputs.

Required sections in a Formspec companion specification description include relationships to Core, additive invariant declarations, cross-reference standards, schema references, and conformance sections to pass toxicity checks and tooling validation.

Defining dependencies and components in frontmatter is required to draft a Formspec companion spec. These metadata fields enable tooling validation, ensure schema conformance, and maintain strict alignment with the Formspec core ecosystem.

Companion specs fail Formspec schema conformance checks due to missing frontmatter identity fields, absent mandated description sections, incomplete metadata like dependencies and keywords, or unresolved additive invariants and cross-reference standards.