Add linting support for cache-mode

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Assessment

Difficulty
2/5
Estimated time
1-3 hours
Newbie friendliness
76/100
Issue type
Feature
Clarity
Clearly specified
Activity status
Active
Tech stack
github-actions, typescript, vscode
Domain
devtools, tooling

Research direction

Start by locating the linting definitions for existing properties such as concurrency and jobs, then inspect how the VS Code extension reports the currently invalid cache-mode property. Done means cache-mode is accepted and linted like the other supported properties without producing an error.

Written by the indexing model from the issue text.

Description

enhancement

Is your feature request related to a problem? Please describe.
With the release of cache-mode, it's time to add linting support for the property!

Describe the solution you'd like
Currently, the extension displays an error for cache-mode.
The solution would be to add linting support for cache-mode like other properties, e.g. concurrency and jobs.

Additional context
Changelog post: https://github.blog/changelog/2026-09-10-control-github-actions-cache-access-with-cache-mode/

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

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