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Document disableFallback input in README #824

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alexarchambault merged 1 commit into from
May 12, 2026
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Document disableFallback input in README #824

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Expand Up @@ -124,6 +124,14 @@ Default: `false`

Set `true` to skip saving and restoring the Ammonite cache, regardless of whether the repository contains `.sc` scripts.

### `disableFallback`

*Optional*

Default: `false`

Set `true` to disable falling back to a less specific cache key when there is no exact cache hit. By default, if no exact cache match is found, the action will restore from a more general cache key (e.g. from a different job or build configuration). Disabling this prevents unintended cache sharing across jobs or matrix instances that have different dependency sets.

## Cache invalidation

To manually invalidate the cache without changing your build files, set the `COURSIER_CACHE_ACTION_CACHE_VERSION`
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