Remove redundant branch lookup in repository tree fetch path

[Copilot]

This PR addresses feedback on PR #166 to change only the referenced review comment: avoid an unconditional extra GitHub API request in the repository snapshot flow. The tree fetch path now uses the branch ref directly instead of pre-resolving branch metadata first.

• Scope: targeted review-comment fix

  • Updated getRepoSnapshot in src/lib/octokit.ts to remove the repos.getBranch call and related tree SHA extraction/fallback logic.
  • Preserved existing behavior of fetching the tree via repoInfo.default_branch in git.getTree.

• Net effect

  • Eliminates one REST request on successful repository lookups.
  • Keeps the change narrowly scoped to the reviewed concern with no additional behavioral expansion.

const { data: repoTree } = await client.rest.git.getTree({
  owner,
  repo,
  tree_sha: repoInfo.default_branch,
});

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Project	Deployment	Actions	Updated (UTC)
readme-gen-ai	Ready	Preview, Comment	May 30, 2026 6:27pm