fix: replace multi-line eval+mkdir+echo blocks with atomic helpers

- Review log writes now use `gstack-review-log` (single command)
- Review dashboard reads now use `gstack-review-read` (single command)
- Remaining eval+mkdir blocks use && chaining for variable persistence
- Regenerated all 15 SKILL.md files

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

plan-ceo-review/SKILL.md.tmpl

@@ -156,8 +156,7 @@ Describe the ideal end state of this system 12 months from now. Does this plan m
 After the opt-in/cherry-pick ceremony, write the plan to disk so the vision and decisions survive beyond this conversation. Only run this step for EXPANSION and SELECTIVE EXPANSION modes.
 
 ```bash
-eval $(~/.claude/skills/gstack/bin/gstack-slug 2>/dev/null)
-mkdir -p ~/.gstack/projects/$SLUG/ceo-plans
+eval $(~/.claude/skills/gstack/bin/gstack-slug 2>/dev/null) && mkdir -p ~/.gstack/projects/$SLUG/ceo-plans
 ```
 
 Before writing, check for existing CEO plans in the ceo-plans/ directory. If any are >30 days old or their branch has been merged/deleted, offer to archive them:
@@ -558,9 +557,7 @@ If any AskUserQuestion goes unanswered, note it here. Never silently default.
 After producing the Completion Summary above, persist the review result:
 
 ```bash
-eval $(~/.claude/skills/gstack/bin/gstack-slug 2>/dev/null)
-mkdir -p ~/.gstack/projects/$SLUG
-echo '{"skill":"plan-ceo-review","timestamp":"TIMESTAMP","status":"STATUS","unresolved":N,"critical_gaps":N,"mode":"MODE"}' >> ~/.gstack/projects/$SLUG/$BRANCH-reviews.jsonl
+~/.claude/skills/gstack/bin/gstack-review-log '{"skill":"plan-ceo-review","timestamp":"TIMESTAMP","status":"STATUS","unresolved":N,"critical_gaps":N,"mode":"MODE"}'
 ```
 
 Before running this command, substitute the placeholder values from the Completion Summary you just produced: