docs: update project documentation for v0.4.2

- README: skill count 9→10, added /document-release to skills table,
  install/uninstall sections, and dedicated section with example
- CHANGELOG: added /document-release bullet to v0.4.2 entry

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

CHANGELOG.md

@@ -4,6 +4,7 @@
 
 - **Skills now respect your branch target.** `/ship`, `/review`, `/qa`, and `/plan-ceo-review` detect which branch your PR actually targets instead of assuming `main`. Stacked branches, Conductor workspaces targeting feature branches, and repos using `master` all just work now.
 - **`/retro` works on any default branch.** Repos using `master`, `develop`, or other default branch names are detected automatically — no more empty retros because the branch name was wrong.
+- **New `/document-release` skill.** Run it after `/ship` but before merging — it reads every doc file in your project, cross-references the diff, and updates README, ARCHITECTURE, CONTRIBUTING, CHANGELOG, and TODOS to match what you actually shipped. Risky changes get surfaced as questions; everything else is automatic.
 - **New `{{BASE_BRANCH_DETECT}}` placeholder** for skill authors — drop it into any template and get 3-step branch detection (PR base → repo default → fallback) for free.
 - **3 new E2E smoke tests** validate base branch detection works end-to-end across ship, review, and retro skills.
 

README.md

@@ -2,7 +2,7 @@
 
 **gstack turns Claude Code from one generic assistant into a team of specialists you can summon on demand.**
 
-Nine opinionated workflow skills for [Claude Code](https://docs.anthropic.com/en/docs/claude-code). Plan review, code review, one-command shipping, browser automation, QA testing, and engineering retrospectives — all as slash commands.
+Ten opinionated workflow skills for [Claude Code](https://docs.anthropic.com/en/docs/claude-code). Plan review, code review, one-command shipping, browser automation, QA testing, engineering retrospectives, and post-ship documentation — all as slash commands.
 
 ### Without gstack
 
@@ -26,6 +26,7 @@ Nine opinionated workflow skills for [Claude Code](https://docs.anthropic.com/en
 | `/qa-only` | QA reporter | Report-only QA testing. Same methodology as /qa but never fixes anything. Use when you want a pure bug report without code changes. |
 | `/setup-browser-cookies` | Session manager | Import cookies from your real browser (Comet, Chrome, Arc, Brave, Edge) into the headless session. Test authenticated pages without logging in manually. |
 | `/retro` | Engineering manager | Team-aware retro: your deep-dive + per-person praise and growth opportunities for every contributor. |
+| `/document-release` | Technical writer | Update README, ARCHITECTURE, CONTRIBUTING, and project docs to match what you just shipped. |
 
 ## Demo: one feature, five modes
 
@@ -104,11 +105,11 @@ This is the setup I use. One person, ten parallel agents, each with the right co
 
 Open Claude Code and paste this. Claude will do the rest.
 
-> Install gstack: run `git clone https://github.com/garrytan/gstack.git ~/.claude/skills/gstack && cd ~/.claude/skills/gstack && ./setup` then add a "gstack" section to CLAUDE.md that says to use the /browse skill from gstack for all web browsing, never use mcp\_\_claude-in-chrome\_\_\* tools, and lists the available skills: /plan-ceo-review, /plan-eng-review, /review, /ship, /browse, /qa, /qa-only, /setup-browser-cookies, /retro. Then ask the user if they also want to add gstack to the current project so teammates get it.
+> Install gstack: run `git clone https://github.com/garrytan/gstack.git ~/.claude/skills/gstack && cd ~/.claude/skills/gstack && ./setup` then add a "gstack" section to CLAUDE.md that says to use the /browse skill from gstack for all web browsing, never use mcp\_\_claude-in-chrome\_\_\* tools, and lists the available skills: /plan-ceo-review, /plan-eng-review, /review, /ship, /browse, /qa, /qa-only, /setup-browser-cookies, /retro, /document-release. Then ask the user if they also want to add gstack to the current project so teammates get it.
 
 ### Step 2: Add to your repo so teammates get it (optional)
 
-> Add gstack to this project: run `cp -Rf ~/.claude/skills/gstack .claude/skills/gstack && rm -rf .claude/skills/gstack/.git && cd .claude/skills/gstack && ./setup` then add a "gstack" section to this project's CLAUDE.md that says to use the /browse skill from gstack for all web browsing, never use mcp\_\_claude-in-chrome\_\_\* tools, lists the available skills: /plan-ceo-review, /plan-eng-review, /review, /ship, /browse, /qa, /setup-browser-cookies, /retro, and tells Claude that if gstack skills aren't working, run `cd .claude/skills/gstack && ./setup` to build the binary and register skills.
+> Add gstack to this project: run `cp -Rf ~/.claude/skills/gstack .claude/skills/gstack && rm -rf .claude/skills/gstack/.git && cd .claude/skills/gstack && ./setup` then add a "gstack" section to this project's CLAUDE.md that says to use the /browse skill from gstack for all web browsing, never use mcp\_\_claude-in-chrome\_\_\* tools, lists the available skills: /plan-ceo-review, /plan-eng-review, /review, /ship, /browse, /qa, /setup-browser-cookies, /retro, /document-release, and tells Claude that if gstack skills aren't working, run `cd .claude/skills/gstack && ./setup` to build the binary and register skills.
 
 Real files get committed to your repo (not a submodule), so `git clone` just works. The binary and node\_modules are gitignored — teammates just need to run `cd .claude/skills/gstack && ./setup` once to build (or `/browse` handles it automatically on first use).
 
@@ -590,6 +591,29 @@ It saves a JSON snapshot to `.context/retros/` so the next run can show trends.
 
 ---
 
+## `/document-release`
+
+This is my **technical writer mode**.
+
+After `/ship` creates the PR but before it merges, `/document-release` reads every documentation file in the project and cross-references it against the diff. It updates file paths, command lists, project structure trees, and anything else that drifted. Risky or subjective changes get surfaced as questions — everything else is handled automatically.
+
+```
+You:   /document-release
+
+Claude: Analyzing 21 files changed across 3 commits. Found 8 documentation files.
+
+        README.md: updated skill count from 9 to 10, added new skill to table
+        CLAUDE.md: added new directory to project structure
+        CONTRIBUTING.md: current — no changes needed
+        TODOS.md: marked 2 items complete, added 1 new item
+
+        All docs updated and committed. PR body updated with doc diff.
+```
+
+It also polishes CHANGELOG voice (without ever overwriting entries), cleans up completed TODOS, checks cross-doc consistency, and asks about VERSION bumps only when appropriate.
+
+---
+
 ## Troubleshooting
 
 **Skill not showing up in Claude Code?**
@@ -614,7 +638,7 @@ Or set `auto_upgrade: true` in `~/.gstack/config.yaml` to upgrade automatically
 
 Paste this into Claude Code:
 
-> Uninstall gstack: remove the skill symlinks by running `for s in browse plan-ceo-review plan-eng-review review ship retro qa qa-only setup-browser-cookies; do rm -f ~/.claude/skills/$s; done` then run `rm -rf ~/.claude/skills/gstack` and remove the gstack section from CLAUDE.md. If this project also has gstack at .claude/skills/gstack, remove it by running `for s in browse plan-ceo-review plan-eng-review review ship retro qa qa-only setup-browser-cookies; do rm -f .claude/skills/$s; done && rm -rf .claude/skills/gstack` and remove the gstack section from the project CLAUDE.md too.
+> Uninstall gstack: remove the skill symlinks by running `for s in browse plan-ceo-review plan-eng-review review ship retro qa qa-only setup-browser-cookies document-release; do rm -f ~/.claude/skills/$s; done` then run `rm -rf ~/.claude/skills/gstack` and remove the gstack section from CLAUDE.md. If this project also has gstack at .claude/skills/gstack, remove it by running `for s in browse plan-ceo-review plan-eng-review review ship retro qa qa-only setup-browser-cookies document-release; do rm -f .claude/skills/$s; done && rm -rf .claude/skills/gstack` and remove the gstack section from the project CLAUDE.md too.
 
 ## Development