Fix global AGENTS.md relative links

The linked files were sometimes misinterpreted as relative to a
particular repo's AGENTS.md.

Author: john-kurkowski

.codex/AGENTS.md

@@ -44,12 +44,12 @@
   `git commit --amend`, `git rebase`, `git reset --hard`, and
   `git cherry-pick --no-commit` followed by history edits.
 - Before creating or updating a commit message, read
-  [style/commit-messages.md](style/commit-messages.md).
+  [~/.codex/style/commit-messages.md](~/.codex/style/commit-messages.md).
 
 ### Worktrees
 
 - When I ask you to work in your own worktree or `jj` workspace, follow
-  [style/worktrees.md](style/worktrees.md).
+  [~/.codex/style/worktrees.md](~/.codex/style/worktrees.md).
 
 ### Pull Requests
 

.codex/style/worktrees.md

@@ -20,7 +20,8 @@ isolate your work from concurrent changes in the prompter's directory.
 
 - In your own worktree, commit your work every turn for the prompter to review.
 - Do not squash your commits unless explicitly asked in the current turn.
-- Use the commit message style from [commit-messages.md](commit-messages.md).
+- Use the commit message style from
+  [~/.codex/style/commit-messages.md](~/.codex/style/commit-messages.md).
 
 ## Turn Summary