feat: worktree isolation for E2E tests + infrastructure elegance (v0.11.12.0) (#425) * refactor: extract gen-skill-docs into modular resolver architecture Break the 3000-line monolith into 10 domain modules under scripts/resolvers/: types, constants, preamble, utility, browse, design, testing, review, codex-helpers, and index. Each module owns one domain of template generation. The preamble module introduces a 4-tier composition system (T1-T4) so skills only pay for the preamble sections they actually need, reducing token usage for lightweight skills by ~40%. Adds a token budget dashboard that prints after every generation run showing per-skill and total token counts. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com> * feat: tiered preamble — skills only pay for what they use Tag all 23 templates with preamble-tier (T1-T4). Lightweight skills like /browse and /benchmark get a minimal preamble (~40% fewer tokens), while review skills get the full stack. Regenerate all SKILL.md files. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com> * feat: migrate eval storage to project-scoped paths Move eval results and E2E run artifacts from ~/.gstack-dev/evals/ to ~/.gstack/projects/$SLUG/evals/ so each project's eval history lives alongside its other gstack data. Falls back to legacy path if slug detection fails. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com> * fix: sync package.json version with VERSION after merge Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com> * feat: add WorktreeManager for isolated test environments Reusable platform module (lib/worktree.ts) that creates git worktrees for test isolation and harvests useful changes as patches. Includes SHA-256 dedup, original SHA tracking for committed change detection, and automatic gitignored artifact copying (.agents/, browse/dist/). 12 unit tests covering lifecycle, harvest, dedup, and error handling. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com> * feat: integrate worktree isolation into E2E test infrastructure Add createTestWorktree(), harvestAndCleanup(), and describeWithWorktree() helpers to e2e-helpers.ts. Add harvest field to EvalTestEntry for eval-store integration. Register lib/worktree.ts as a global touchfile. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com> * feat: run Gemini and Codex E2E tests in worktrees Switch both test suites from cwd: ROOT to worktree isolation. Gemini (--yolo) no longer pollutes the working tree. Codex (read-only) gets worktree for consistency. Useful changes are harvested as patches for cherry-picking. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com> * fix: skip symlinks in copyDirSync to prevent infinite recursion Adversarial review caught that .claude/skills/gstack may be a symlink back to the repo root, causing copyDirSync to recurse infinitely when copying gitignored artifacts into worktrees. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com> * chore: bump version and changelog (v0.11.12.0) Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com> * fix: relax session-awareness assertion to accept structured options The LLM consistently presents well-formatted A/B choices with pros/cons but doesn't always use the exact string "RECOMMENDATION". Accept case-insensitive "recommend", "option a", "which do you want", or "which approach" as equivalent signals of a structured recommendation. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com> --------- Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>