fix(committer): forbid --author in shared workspace committer prompt

workflows/_shared/workspace-committer.ts

@@ -47,7 +47,7 @@ function workspaceCommitterPrompt({
    - Example: \`${branchCheckoutExample}\`
 3. \`git add -A\`
 4. Write a **conventional commit** message summarizing what changed and why (scope may be \`${conventionalCommitScopeHint}\` or similar).
-5. \`git commit -m "<message>"\` (use multiple \`-m\` if you need a body).
+5. \`git commit -m "<message>"\` (use multiple \`-m\` if you need a body). Do **not** pass \`--author\` — always use the repo's local git config identity.
 6. \`git push -u origin <branch-name>\`
 
 **committed=true** only if branch was created, commit succeeded, and **push** succeeded.