gh aw add rewrites {{#import shared/X.md}} with incorrect cross-repo path (resolves from repo root instead of .github/workflows/)

[johnpreed]

Bug Description

When installing a workflow from a remote repository via gh aw add, body-level {{#import shared/X.md}} directives are rewritten to cross-repo imports. This causes two distinct problems:

Problem 1: Unwanted rewriting of intentionally-local imports

gh aw add rewrites ALL {{#import shared/X.md}} directives to cross-repo paths pinned to the source repository (e.g., {{#import github/source-repo/shared/X.md@SHA}}). There is no way to indicate that an import should remain local — resolved from the consuming repository's own .github/workflows/shared/ directory rather than fetched from the source.

This breaks the shared workflow library pattern where a source repo publishes reusable workflows, but consuming repos provide their own local shared/ files with repo-specific or team-specific configuration.

Problem 2: Incorrect cross-repo path resolution

Even if the cross-repo rewriting were desired, the rewritten path is wrong. gh aw add resolves shared/X.md from the repository root instead of .github/workflows/shared/X.md, causing a 404.

Steps to Reproduce

1. In a source repository, create a workflow at .github/workflows/my-workflow.md containing:

   {{#import shared/config.md}}

2. The shared file exists at .github/workflows/shared/config.md in the source repo (compiles fine locally).

3. In a consuming repository, provide a local .github/workflows/shared/config.md with repo-specific content.

4. Install the workflow:

   gh aw add github/source-repo/.github/workflows/my-workflow.md --force

5. The import is rewritten to:

   {{#import github/source-repo/shared/config.md@abc123}}

6. Compilation fails:

   ✗ error: failed to resolve required include 'github/source-repo/shared/config.md@abc123'
   HTTP 404: Not Found
   (https://api.github.com/repos/github/source-repo/contents/shared/config.md?ref=abc123)
   

Expected Behavior

{{#import shared/config.md}} should remain unchanged after gh aw add, resolving locally in the consuming repository. Not all shared imports should be pinned to the source repo — some are intentionally local.

Actual Behavior

gh aw add rewrites the import to a cross-repo path:

{{#import github/source-repo/shared/config.md@abc123}}

This is wrong in two ways:

1. It pins to the source repo instead of staying local
2. It resolves from the repo root (shared/config.md) instead of .github/workflows/shared/config.md

Impact

Every gh aw add and presumably gh aw update requires a manual post-install fix to revert the rewritten imports, making the install/update cycle non-idempotent.

Environment

• gh aw version: v0.64.2

Desired Outcome

1. Primary ask: Provide a way to mark body-level {{#import}} directives as "local-only" so they are not rewritten during gh aw add. These imports should resolve from the consuming repo's local .github/workflows/shared/ directory.

2. Secondary ask: If cross-repo import rewriting is kept for some cases, fix the path resolution so it uses the correct full path (.github/workflows/shared/X.md) instead of resolving from the repo root (shared/X.md).