When a snap declares a `hooks:` section, Snapcraft currently creates `meta/hooks/<name>` placeholder stubs early in metadata generation. If a part later produces the real hook at `snap/hooks/<name>`, the placeholder blocks it from being staged into the final snap, leaving snapd to execute `#!/bin/true` instead of the generated hook. - **Hook provisioning** - Treat the auto-generated `#!/bin/true` file in `meta/hooks` as a replaceable placeholder during `provision_hooks(..., overwrite=False)`. - Preserve existing project hooks and other non-placeholder `meta/hooks/*` entries; only placeholder stubs are overwritten by part-generated hooks. - **Regression coverage** - Add a unit regression for `_materialize_extra_assets()` covering the failing case: a built hook in `snap/hooks/` plus an existing placeholder in `meta/hooks/`. - Update the spread regression for generated hooks to reproduce the real trigger condition: - a declared `hooks:` entry - a part-generated `snap/hooks/configure` - Assert that both `prime/meta/hooks/configure` and the packed snap contain the real generated hook payload, not the stub. - **Behavioral intent** - Keep the current precedence model intact: - project hooks still override built hooks - built hooks replace only Snapcraft-generated placeholders ```python destination = hooks_meta_dir / hook.name if ( destination.exists() and not overwrite and not _is_placeholder_hook(destination) ): continue ``` <!-- START COPILOT CODING AGENT SUFFIX --> - Fixes #6433