Pstack Skill
fabricioctelles/skills
Rigorous engineering orchestrator ported from Lauren Tan's pstack (poteto-mode): reads your task, picks one of 23 playbooks (bug fix, feature, refactoring, perf, investigation, prototype, babysit…
Write and improve agent skills (SKILL.md files). An agent skill from millionco/expect.
Install Skill Writing
$ npx skills add millionco/expect --skill skill-writing -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install millionco/expect skill-writing --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/millionco/expect.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/skill-writing .claude/skills/skill-writing && 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 "skill-writing" agent skill from https://github.com/millionco/expect/tree/main/.agents/skills/skill-writing into .claude/skills/skill-writing/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "skill-writing", 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/millionco/expect/tree/main/.agents/skills/skill-writingType 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 millionco/expect --skill skill-writing -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install millionco/expect skill-writing --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/millionco/expect.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.agents/skills/skill-writing .agents/skills/skill-writing && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "skill-writing" agent skill from https://github.com/millionco/expect/tree/main/.agents/skills/skill-writing into .agents/skills/skill-writing/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "skill-writing", 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 millionco/expect --skill skill-writing -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install millionco/expect skill-writing --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/millionco/expect.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.agents/skills/skill-writing .cursor/skills/skill-writing && 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 "skill-writing" agent skill from https://github.com/millionco/expect/tree/main/.agents/skills/skill-writing into .cursor/skills/skill-writing/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "skill-writing", 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/millionco/expect.git --path .agents/skills/skill-writing--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 millionco/expect --skill skill-writing -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install millionco/expect skill-writing --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/millionco/expect.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.agents/skills/skill-writing .gemini/skills/skill-writing && 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 "skill-writing" agent skill from https://github.com/millionco/expect/tree/main/.agents/skills/skill-writing into .gemini/skills/skill-writing/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "skill-writing", 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 millionco/expect skill-writingInstalls 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 millionco/expect --skill skill-writing -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/millionco/expect.git skills-src && mkdir -p .github/skills && cp -r skills-src/.agents/skills/skill-writing .github/skills/skill-writing && 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 "skill-writing" agent skill from https://github.com/millionco/expect/tree/main/.agents/skills/skill-writing into .github/skills/skill-writing/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "skill-writing", 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 millionco/expect --skill skill-writing -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install millionco/expect skill-writing --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/millionco/expect.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.agents/skills/skill-writing .opencode/skills/skill-writing && 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 "skill-writing" agent skill from https://github.com/millionco/expect/tree/main/.agents/skills/skill-writing into .opencode/skills/skill-writing/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "skill-writing", 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
skill-writing- GitHub stars
- 3.6k
- Token cost
- ~1.8k tokens
- SKILL.md length
- 824 words
- Files
- 1
- Skills in repo
- 5
- Repo updated
- First seen
- Licence
- Custom licence
At a glance
Write and improve agent skills (SKILL.md files). An agent skill from millionco/expect.
- Creating new skills
- SKILL.md covers The Iron Law, When to Create a Skill, Core Principles and Description Optimization, plus 5 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
- Refactoring existing ones
What it does
Skill Writing is an agent skill from millionco/expect. Write and improve agent skills (SKILL.md files). Use when creating new skills, refactoring existing ones, debugging why an agent ignores instructions, or improving compliance. Covers prompt structure, TDD for skills, description optimization, and rationalization bulletproofing.
Its SKILL.md is about 1.8k 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, covering Skill authoring, Test-driven development and Refactoring. The repository describes itself as: Expect tests your agent's code in a real browser.
When your agent uses it
- Creating new skills
- Refactoring existing ones
- Debugging why an agent ignores instructions
- Improving compliance
Example prompts
- “/skill-writing”
What it can do on your machine
Read from SKILL.md and the folder at commit 39e9750. 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
No scripts in the folder and no shell commands in SKILL.md (its code samples are markdown and yaml).
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
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
Skill Writing loads about 1.8k tokens when it runs. Until then it costs about 73 tokens; SKILL.md has 824 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 824 words (~1,839 tokens).
“Skills are bundled instruction modules that load into an agent's context when activated. They are the highest-leverage mechanism for controlling agent behavior because they deliver focused instructions at the moment of relevance.”
- name
- skill-writing
Files
Just SKILL.md in .agents/skills/skill-writing of millionco/expect.
Open the folder on GitHubat commit 39e9750
Compare with similar skills
Skill Writing 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 |
|---|---|---|---|---|---|---|
| Skill Writing this skillmillionco/expect | 3.6k | — | ~1.8k | Automated safety check: Pass | Custom licence | |
| Pstack Skillfabricioctelles/skills | 106 | — | ~5k | Automated safety check: Pass | Apache-2.0 | |
| Go Rigmudrii/openclaw-dashboard | 458 | — | ~2.8k | Automated safety check: Pass | MIT | |
| Go Rigmudrii/openclaw-dashboard | 458 | — | ~682 | Automated safety check: Pass | MIT | |
| Py Rigmudrii/hermesd | 118 | — | ~6.3k | Automated safety check: Pass | MIT | |
| Happier Implementhappier-dev/happier | 1.9k | — | ~4.2k | Automated safety check: Pass | MIT |
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Related
Categories
Questions about Skill Writing
What does Skill Writing do?
Write and improve agent skills (SKILL.md files). An agent skill from millionco/expect. Skill Writing is an agent skill from millionco/expect.md files).
When should I use Skill Writing?
Skill Writing fits situations like: creating new skills; refactoring existing ones; debugging why an agent ignores instructions; improving compliance.
How do I install Skill Writing in Claude Code?
Run `npx skills add millionco/expect --skill skill-writing -a claude-code`. Or copy the skill folder (.agents/skills/skill-writing in millionco/expect) into .claude/skills/skill-writing in your project. Claude Code loads it when a task matches its description.
How do I install Skill Writing in Codex?
Run `npx skills add millionco/expect --skill skill-writing -a codex`. Or copy the skill folder (.agents/skills/skill-writing in millionco/expect) into .agents/skills/skill-writing in your project. Codex loads it when a task matches its description.
Can I use Skill Writing 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 millionco/expect --skill skill-writing -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/skill-writing, .gemini/skills/skill-writing, .github/skills/skill-writing and .opencode/skills/skill-writing in your project.
What does Skill Writing need to run?
SKILL.md names no scripts, command-line tools or credentials: Skill Writing is instructions for the agent only.
Does Skill Writing access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Skill Writing 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 Skill Writing use?
Skill Writing 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 Skill Writing use?
About 1.8k tokens (SKILL.md is roughly 7.4k 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 Skill Writing?
Skills that share tags, products or a category with Skill Writing: Pstack Skill (fabricioctelles/skills, 106 stars), Go Rig (mudrii/openclaw-dashboard, 458 stars), Go Rig (mudrii/openclaw-dashboard, 458 stars) and Py Rig (mudrii/hermesd, 118 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Skill Writing?
millionco (a GitHub organization) maintains it in millionco/expect, which has 3,558 GitHub stars. The repository holds 5 skills in this directory. The repository was last updated on May 6, 2026.
Source: millionco/expect on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.