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Language reference / fallback

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Meaning and placement

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→ run → access

What may replace the declared selection · none, also the meaning of an omitted fallback once access is declared: no other route, protocol, model or effort, before admission or after it — an unavailable route refuses before inference and a route failing mid-run fails its task, never re-routed. Declared alternatives are unspecified; a later value is additive. In the same object: protocol · via Schema source (use the pointer above)

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In a source template

Excerpt from templates/recover-optional-file.nika, source lines 11–20. This is a fragment, not a runnable workflow.
illustration

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Templates containing this field

These are literal key occurrences in the source files, not an execution or conformance claim. How to instantiate a template.

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Contract and implementation

This page projects the named specification revision. Check released engine status and the validation workflow before running a file. An optional field is not evidence that every engine supports every value. Canonical identity: language:word:fallback. Spec revision: f3a952514b51. How documentation stays connected.