find-parent-chapter

name	find-parent-chapter
description	Find the parent chapter for a changed Quarto subfile and print the exact HTML render command to run. Use when working in `_subfiles/` or when you need the owning `chapters/*.qmd` file.
argument-hint	Optionally provide a subfile path or chapter-related path to resolve

Resolve a changed content file to the parent chapter that includes it.

This skill is for repo-specific Quarto routing, not content editing. If the user gives a file under _subfiles/, find every chapters/*.qmd file that includes it, then report the parent chapter path and the exact command:

quarto render chapters/<chapter>.qmd --to html

Workflow:

1. Determine the target path. Use the user-provided path if present. Otherwise use the active file.
2. If the target is already a parent chapter under chapters/, report that directly and print the same HTML render command.
3. If the target is under _subfiles/, search for literal include lines of the form: {{< include _subfiles/... >}} inside chapters/*.qmd.
4. If exactly one parent chapter matches, return:
   • the parent chapter path
   • the render command
   • a brief note that local validation should run on the parent chapter, not the subfile
5. If multiple parents match, list all matches and tell the user to render each relevant parent.
6. If no parent chapter matches, say that explicitly and suggest checking nested includes in nearby .qmd files.

Keep the response compact. Do not start editing content. See quarto-content.instructions.md and copilot-instructions.md for the underlying repo policy.