fix: atomic review log helpers + platform-agnostic templates (v0.8.5) (#209)

* fix: add gstack-review-log and gstack-review-read atomic helpers

Branch names with `/` break review log filepaths when Claude Code runs
multi-line bash blocks as separate shell invocations. These two scripts
encapsulate the full operation in a single command.

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

* 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 source+mkdir blocks use && chaining for variable persistence
- Regenerated all SKILL.md files

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

* fix: remove Rails-isms — platform-agnostic templates and checklist

- review/checklist.md: multi-framework examples (Rails/Node/Python/Django)
- plan-ceo-review: framework-agnostic grep + generic error table
- plan-eng-review: "corresponding test" not "JS or Rails test"
- CLAUDE.md: Platform-agnostic design principle + Testing section

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

* test: update tests for gstack-review-log/read helpers

- codex review log test: check for gstack-review-log instead of reviews.jsonl
- dashboard resolver tests: check for gstack-review instead of reviews.jsonl

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

* chore: bump version and changelog (v0.8.5)

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

---------

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

CHANGELOG.md

@@ -1,5 +1,18 @@
 # Changelog
 
+## [0.8.5] - 2026-03-19
+
+### Fixed
+
+- **Review log no longer breaks on branch names with `/`.** Branch names like `garrytan/design-system` caused review log writes to fail because Claude Code runs multi-line bash blocks as separate shell invocations, losing variables between commands. New `gstack-review-log` and `gstack-review-read` atomic helpers encapsulate the entire operation in a single command.
+- **All skill templates are now platform-agnostic.** Removed Rails-specific patterns (`bin/test-lane`, `RAILS_ENV`, `.includes()`, `rescue StandardError`, etc.) from `/ship`, `/review`, `/plan-ceo-review`, and `/plan-eng-review`. The review checklist now shows examples for Rails, Node, Python, and Django side-by-side.
+- **`/ship` reads CLAUDE.md to discover test commands** instead of hardcoding `bin/test-lane` and `npm run test`. If no test commands are found, it asks the user and persists the answer to CLAUDE.md.
+
+### Added
+
+- **Platform-agnostic design principle** codified in CLAUDE.md — skills must read project config, never hardcode framework commands.
+- **`## Testing` section** in CLAUDE.md for `/ship` test command discovery.
+
 ## [0.8.4] - 2026-03-19
 
 ### Added