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Syntax highlighting and autocomplete for composite actions

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Assessment

Difficulty
4/5
Estimated time
3-5 days
Newbie friendliness
35/100
Issue type
Feature
Clarity
Mostly clear
Activity status
Stale
Tech stack
typescript, vscode
Domain
tooling

Research direction

Start by locating the existing workflow syntax-highlighting and autocomplete entry points, then compare their handling with .github/actions/**/action.yml and root action.yml. Done means composite action files receive syntax highlighting and autocomplete comparable to workflows; verify both example locations.

Written by the indexing model from the issue text.

Description

enhancement

Is your feature request related to a problem? Please describe.
Syntax highlighting works great when working on workflows, but dowsn't work at all when working on composite actions.

Describe the solution you'd like
Add syntax higlighting when working on a composite action (e.g. under .github/actions/**/action.yml, or root action.yml)

Additional context
This almost discourages working on composite actions over reusable workflows, even though reusable workflows can be more painful.

Dominant language
TypeScript
Stars
661
Forks
214
No merged PRs in 30d

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