Changeset Validation Skill for Codex

Changeset Validation

Overview

This skill validates whether changesets correctly reflect package changes and follow the repository rules. It relies on the shared prompt in references/validation-prompt.md so local Codex reviews and GitHub Actions share the same logic.

Experimental or preview-only feature additions that are explicitly labeled as such in the diff may remain a patch bump when they do not change existing behavior.

Major bumps are only allowed after the first major release; before that, do not use major bumps for feature-level changes.

Quick start

Local (Codex-driven):

• Run:

   pnpm changeset:validate-prompt

• Apply the rules from references/validation-prompt.md to the generated prompt.
• Respond with a JSON verdict containing ok/errors/warnings/required_bump (English-only strings).

CI (Codex Action):

• Run:

   pnpm changeset:validate-prompt -- --ci --output .github/codex/prompts/changeset-validation.generated.md

• Use openai/codex-action with the generated prompt and JSON schema to get a structured verdict.

Workflow

• Generate the prompt context via pnpm changeset:validate-prompt.
• Apply the rules in references/validation-prompt.md to judge correctness.
• Provide a clear verdict and required bump (patch/minor/major/none).
• If the changeset needs edits, update it and re-run the validation.

Branch-level changeset rule (do not skip)

• If any .changeset/*.md file is already present in the current branch diff, treat it as the active changeset. Do not add a new changeset file.
• Instead, update the existing changeset file by rewriting its summary to reflect the primary change relative to main. Do not try to capture every incremental update.
• Keep the summary at one line; replace the line as needed rather than appending. If you must include multiple points, compress them into a single line.

Shared source of truth

• Keep the prompt file as the single source of validation rules.
• Keep the script lightweight: it should only gather context and emit the prompt.

Resources

• references/validation-prompt.md