Finishing a Development Branch
obra/superpowers
Walks the last step of a branch: confirm tests pass, detect the git environment, ask how to integrate, carry out your choice and clean up the worktree.
Post to or read the fleet mailbox. An agent skill from ritchiecarroll/go2cs.
Install Mailbox
$ npx skills add ritchiecarroll/go2cs --skill mailbox -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install ritchiecarroll/go2cs mailbox --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/ritchiecarroll/go2cs.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.claude/skills/mailbox .claude/skills/mailbox && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "mailbox" agent skill from https://github.com/ritchiecarroll/go2cs/tree/master/.claude/skills/mailbox into .claude/skills/mailbox/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "mailbox", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/ritchiecarroll/go2cs/tree/master/.claude/skills/mailboxType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add ritchiecarroll/go2cs --skill mailbox -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install ritchiecarroll/go2cs mailbox --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/ritchiecarroll/go2cs.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.claude/skills/mailbox .agents/skills/mailbox && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "mailbox" agent skill from https://github.com/ritchiecarroll/go2cs/tree/master/.claude/skills/mailbox into .agents/skills/mailbox/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "mailbox", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add ritchiecarroll/go2cs --skill mailbox -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install ritchiecarroll/go2cs mailbox --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/ritchiecarroll/go2cs.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.claude/skills/mailbox .cursor/skills/mailbox && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "mailbox" agent skill from https://github.com/ritchiecarroll/go2cs/tree/master/.claude/skills/mailbox into .cursor/skills/mailbox/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "mailbox", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/ritchiecarroll/go2cs.git --path .claude/skills/mailbox--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add ritchiecarroll/go2cs --skill mailbox -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install ritchiecarroll/go2cs mailbox --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/ritchiecarroll/go2cs.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.claude/skills/mailbox .gemini/skills/mailbox && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "mailbox" agent skill from https://github.com/ritchiecarroll/go2cs/tree/master/.claude/skills/mailbox into .gemini/skills/mailbox/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "mailbox", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install ritchiecarroll/go2cs mailboxInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add ritchiecarroll/go2cs --skill mailbox -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/ritchiecarroll/go2cs.git skills-src && mkdir -p .github/skills && cp -r skills-src/.claude/skills/mailbox .github/skills/mailbox && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "mailbox" agent skill from https://github.com/ritchiecarroll/go2cs/tree/master/.claude/skills/mailbox into .github/skills/mailbox/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "mailbox", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add ritchiecarroll/go2cs --skill mailbox -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install ritchiecarroll/go2cs mailbox --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/ritchiecarroll/go2cs.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.claude/skills/mailbox .opencode/skills/mailbox && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "mailbox" agent skill from https://github.com/ritchiecarroll/go2cs/tree/master/.claude/skills/mailbox into .opencode/skills/mailbox/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "mailbox", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
mailbox- GitHub stars
- 400
- Token cost
- ~8k tokens
- SKILL.md length
- 1,971 words
- Files
- 1
- Skills in repo
- 5
- Repo updated
- First seen
- Licence
- Custom licence
At a glance
Post to or read the fleet mailbox. An agent skill from ritchiecarroll/go2cs.
- Development work in your project
- SKILL.md covers Before you post a claim, Posting, Confirming delivery and Reading and anchors, plus 2 more sections
- Calls git
What it does
Mailbox is an agent skill from ritchiecarroll/go2cs. Post to or read the fleet mailbox. Anchors, read discipline, push contention, duplicate-post defences and the state-advancing-tool rules.
Its SKILL.md is about 8k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Development. It works with Git. The repository describes itself as: Golang to C Converter.
When your agent uses it
- Development work in your project
Example prompts
- “/mailbox”
What it can do on your machine
Read from SKILL.md and the folder at commit 5417664. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Shell commands in SKILL.md call:
git
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md. Its commands use git, which can reach the network depending on how they are called.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Mailbox loads about 8k tokens when it runs. Until then it costs about 36 tokens; SKILL.md has 1,971 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 1,971 words (~8,033 tokens).
“Phase 1 of docs/PLAN-context-diet.md: RELOCATION ONLY, no compression, no edits. The byte-identical original is docs/doctrine/JOURNAL-2026-09-12.md. Phase 2 (2026-09-12) distilled this file: every dated narrative was moved into an HTML comment OPENING ON THE LAST LINE OF THE RULE IT JUSTIFIES…”
- name
- mailbox
Files
Just SKILL.md in .claude/skills/mailbox of ritchiecarroll/go2cs.
Open the folder on GitHubat commit 5417664
Compare with similar skills
Mailbox next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Mailbox this skillritchiecarroll/go2cs | 400 | — | ~8k | Automated safety check: Pass | Custom licence | |
| Finishing a Development Branchobra/superpowers | 296k | 5 repos | ~1.9k | Automated safety check: Pass | MIT | |
| Code Review ChecklistshareAI-lab/learn-claude-code | 78k | 5 repos | ~1.1k | Automated safety check: Pass | MIT | |
| Codebase Knowledge Graph Q&AEgonex-AI/Understand-Anything | 86k | 1 repos | ~1.2k | Automated safety check: Pass | MIT | |
| Code Design Rationale Investigatorcursor/plugins | 10k | 9 repos | ~2.6k | Automated safety check: Pass | None | |
| Understand Diff AnalysisEgonex-AI/Understand-Anything | 86k | 1 repos | ~1.4k | Automated safety check: Pass | MIT |
Similar skills
Code Review Checklist
shareAI-lab/learn-claude-code
Reviews code against a five-part checklist covering security, correctness, performance, maintainability and testing, and reports findings in a fixed format.
Codebase Knowledge Graph Q&A
Egonex-AI/Understand-Anything
Answers questions about a codebase by searching a prebuilt knowledge graph of its files, functions, classes and dependencies, not by rereading every source file.
- Official
Code Design Rationale Investigator
cursor/plugins
Digs into why code is shaped the way it is by checking git history, pull requests and connected tools in parallel, then reporting a cited read on the tradeoffs.
Understand Diff Analysis
Egonex-AI/Understand-Anything
Reads your git changes or a pull request against a prebuilt knowledge graph of the project to explain what changed, which components are affected and what is risky.
Understand Explain
Egonex-AI/Understand-Anything
Gives an in-depth explanation of one file, function or module by reading the project's knowledge graph and checking that the graph is still fresh.
More from ritchiecarroll/go2cs
Save State
ritchiecarroll/go2cs
Weekly save-state / GitHub-persist procedure for the fleet — run when weekly usage passes 90% (or the owner asks).
Corpus Reconvert
ritchiecarroll/go2cs
Measure a converter change's corpus footprint. An agent skill from ritchiecarroll/go2cs.
Merge Hazards
ritchiecarroll/go2cs
Merge or rebase concurrent lane branches. An agent skill from ritchiecarroll/go2cs.
Train Assembly
ritchiecarroll/go2cs
Assemble, rehearse, gate or land a train. An agent skill from ritchiecarroll/go2cs.
Related
Works with
Categories
Questions about Mailbox
What does Mailbox do?
Post to or read the fleet mailbox. An agent skill from ritchiecarroll/go2cs. Mailbox is an agent skill from ritchiecarroll/go2cs. Post to or read the fleet mailbox.
When should I use Mailbox?
Mailbox fits situations like: development work in your project.
How do I install Mailbox in Claude Code?
Run `npx skills add ritchiecarroll/go2cs --skill mailbox -a claude-code`. Or copy the skill folder (.claude/skills/mailbox in ritchiecarroll/go2cs) into .claude/skills/mailbox in your project. Claude Code loads it when a task matches its description.
How do I install Mailbox in Codex?
Run `npx skills add ritchiecarroll/go2cs --skill mailbox -a codex`. Or copy the skill folder (.claude/skills/mailbox in ritchiecarroll/go2cs) into .agents/skills/mailbox in your project. Codex loads it when a task matches its description.
Can I use Mailbox in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add ritchiecarroll/go2cs --skill mailbox -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/mailbox, .gemini/skills/mailbox, .github/skills/mailbox and .opencode/skills/mailbox in your project.
What does Mailbox need to run?
Going by SKILL.md and its folder, Mailbox needs the command-line tools its instructions call (git).
Does Mailbox access the network?
SKILL.md contains no URLs. Its commands use git, which can reach the network depending on how they are called. This is read from the text; nothing was executed.
Is Mailbox safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Mailbox use?
Mailbox has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.
How many tokens does Mailbox use?
About 8k tokens (SKILL.md is roughly 32k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Mailbox?
Skills that share tags, products or a category with Mailbox: Finishing a Development Branch (obra/superpowers, 296k stars), Code Review Checklist (shareAI-lab/learn-claude-code, 78k stars), Codebase Knowledge Graph Q&A (Egonex-AI/Understand-Anything, 86k stars) and Code Design Rationale Investigator (cursor/plugins, 10k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Mailbox?
ritchiecarroll (a GitHub user) maintains it in ritchiecarroll/go2cs, which has 400 GitHub stars. The repository holds 5 skills in this directory. The repository was last updated on October 8, 2026.
Source: ritchiecarroll/go2cs on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.