fix(agents): fix fix-ci invocation and pr-flow gh command robustness

fix-ci was invoking git-commit as a slash-command without declaring
Skill in allowed-tools, which would silently fail at runtime. Switch
to Skill tool invocation and declare allowed-tools: Bash, Skill.

pr-flow used `cd $WORKTREE_PATH && gh pr view ...` to capture the PR URL,
which is fragile since cd only affects that shell invocation. Replace
with `gh -C $WORKTREE_PATH pr view ...` for explicit directory context.

Co-Authored-By: Claude <noreply@anthropic.com>

Author: nkoji21

.agents/skills/fix-ci/SKILL.md

@@ -2,6 +2,7 @@
 name: fix-ci
 description: Auto-diagnose and fix CI failures by fetching GitHub Actions logs via gh CLI and resolving errors.
 user-invocable: true
+allowed-tools: Bash, Skill
 ---
 
 Let's fix whatever error we can find in CI using the `gh` CLI.
@@ -21,4 +22,4 @@ Let's fix whatever error we can find in CI using the `gh` CLI.
 3. Fetch the logs for the broken action using `gh run view <run-id> --log-failed`
 4. Make a quick plan on what needs to be fixed
 5. Fix the error
-6. Commit the fix using `/git-commit`
+6. Commit the fix using the Skill tool to invoke `git-commit`

.agents/skills/pr-flow/SKILL.md

@@ -48,7 +48,7 @@ Use the Skill tool to invoke the `git-pr` skill with args `--path $WORKTREE_PATH
 
 After the skill completes, capture the PR URL:
 ```
-cd $WORKTREE_PATH && gh pr view --json url --jq '.url'
+gh -C $WORKTREE_PATH pr view --json url --jq '.url'
 ```
 
 If `gh pr create` failed because a PR already exists, retrieve the existing PR URL with the same command.