feat: /retro global — cross-project AI coding retrospective (v0.10.2.0) (#316)

* feat: gstack-global-discover — cross-tool AI session discovery

Standalone script that scans Claude Code, Codex CLI, and Gemini CLI
session directories, resolves each session's working directory to a git
repo, deduplicates by normalized remote URL, and outputs structured JSON.

- Reads only first 4-8KB of session files (avoids OOM on large transcripts)
- Only counts JSONL files modified within the time window (accurate counts)
- Week windows midnight-aligned like day windows for consistency
- 16 tests covering URL normalization, CLI behavior, and output structure

* feat: /retro global — cross-project retro using discovery engine

Adds Global Retrospective Mode to the /retro skill. When invoked as
`/retro global`, skips the repo-scoped retro and instead uses
gstack-global-discover to find all AI coding sessions across all tools,
then runs git log on each discovered repo for a unified cross-project
retrospective with global shipping streak and context-switching metrics.

* chore: bump version and changelog (v0.9.9.0)

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

* docs: sync documentation with shipped changes

Update README /retro description to mention global mode.
Add bin/ directory to CLAUDE.md project structure.

* feat: /retro global adds per-project personal contributions breakdown

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

* chore: regenerate SKILL.md files after main merge

* chore: bump version and changelog (v0.10.2.0)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* feat: test coverage catalog — shared audit across plan/ship/review (v0.10.1.0) (#259)

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

* feat: /retro global shareable personal card — screenshot-ready stats

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

* chore: regenerate Codex/agents SKILL.md for retro shareable card

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

* fix: widen retro global card — never truncate repo names

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

* fix: retro global card — left border only, drop unreliable right border

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

---------

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

README.md

@@ -141,9 +141,9 @@ Each skill feeds into the next. `/office-hours` writes a design doc that `/plan-
 | `/canary` | **SRE** | Post-deploy monitoring loop. Watches for console errors, performance regressions, and page failures. |
 | `/benchmark` | **Performance Engineer** | Baseline page load times, Core Web Vitals, and resource sizes. Compare before/after on every PR. |
 | `/document-release` | **Technical Writer** | Update all project docs to match what you just shipped. Catches stale READMEs automatically. |
-| `/retro` | **Eng Manager** | Team-aware weekly retro. Per-person breakdowns, shipping streaks, test health trends, growth opportunities. |
+| `/retro` | **Eng Manager** | Team-aware weekly retro. Per-person breakdowns, shipping streaks, test health trends, growth opportunities. `/retro global` runs across all your projects and AI tools (Claude Code, Codex, Gemini). |
 | `/browse` | **QA Engineer** | Real Chromium browser, real clicks, real screenshots. ~100ms per command. |
-| `/setup-browser-cookies` | **Session Manager** | Import cookies from your real browser into the headless session. Test authenticated pages. |
+| `/setup-browser-cookies` | **Session Manager** | Import cookies from your real browser (Chrome, Arc, Brave, Edge) into the headless session. Test authenticated pages. |
 | `/autoplan` | **Review Pipeline** | One command, fully reviewed plan. Runs CEO → design → eng review automatically with encoded decision principles. Surfaces only taste decisions for your approval. |
 
 ### Power tools