Ghost Private Feature Flag
TryGhost/Ghost
Adds a private developer-experiments feature flag to Ghost, covering the backend registration, the Labs settings toggle and the test snapshot updates.
Package registration. An agent skill from foldkit/foldkit.
MITAuto-check passed
Install Package Development
$ npx skills add foldkit/foldkit --skill package-development -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install foldkit/foldkit package-development --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/foldkit/foldkit.git skills-src && mkdir -p .claude/skills && cp -r skills-src/repos/effect/.agents/skills/package-development .claude/skills/package-development && 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 "package-development" agent skill from https://github.com/foldkit/foldkit/tree/main/repos/effect/.agents/skills/package-development into .claude/skills/package-development/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "package-development", 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/foldkit/foldkit/tree/main/repos/effect/.agents/skills/package-developmentType 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 foldkit/foldkit --skill package-development -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install foldkit/foldkit package-development --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/foldkit/foldkit.git skills-src && mkdir -p .agents/skills && cp -r skills-src/repos/effect/.agents/skills/package-development .agents/skills/package-development && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "package-development" agent skill from https://github.com/foldkit/foldkit/tree/main/repos/effect/.agents/skills/package-development into .agents/skills/package-development/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "package-development", 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 foldkit/foldkit --skill package-development -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install foldkit/foldkit package-development --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/foldkit/foldkit.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/repos/effect/.agents/skills/package-development .cursor/skills/package-development && 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 "package-development" agent skill from https://github.com/foldkit/foldkit/tree/main/repos/effect/.agents/skills/package-development into .cursor/skills/package-development/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "package-development", 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/foldkit/foldkit.git --path repos/effect/.agents/skills/package-development--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 foldkit/foldkit --skill package-development -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install foldkit/foldkit package-development --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/foldkit/foldkit.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/repos/effect/.agents/skills/package-development .gemini/skills/package-development && 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 "package-development" agent skill from https://github.com/foldkit/foldkit/tree/main/repos/effect/.agents/skills/package-development into .gemini/skills/package-development/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "package-development", 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 foldkit/foldkit package-developmentInstalls 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 foldkit/foldkit --skill package-development -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/foldkit/foldkit.git skills-src && mkdir -p .github/skills && cp -r skills-src/repos/effect/.agents/skills/package-development .github/skills/package-development && 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 "package-development" agent skill from https://github.com/foldkit/foldkit/tree/main/repos/effect/.agents/skills/package-development into .github/skills/package-development/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "package-development", 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 foldkit/foldkit --skill package-development -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install foldkit/foldkit package-development --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/foldkit/foldkit.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/repos/effect/.agents/skills/package-development .opencode/skills/package-development && 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 "package-development" agent skill from https://github.com/foldkit/foldkit/tree/main/repos/effect/.agents/skills/package-development into .opencode/skills/package-development/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "package-development", 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
package-development- GitHub stars
- 918
- Token cost
- ~490 tokens
- SKILL.md length
- 235 words
- Files
- 4
- Skills in repo
- 18
- Repo updated
- First seen
- Licence
- MIT
At a glance
Package registration. An agent skill from foldkit/foldkit.
- Works in 7 steps: Inspect the closest package in the same… → Create or move only required source,… → Read registration.md. Classify every… → …
- Adding a workspace package
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
- Making a private package publishable
What it does
Package Development is an agent skill from foldkit/foldkit. Package registration. Use when adding a workspace package, making a private package publishable, renaming a package, or moving its workspace path.
Its SKILL.md is about 490 tokens, which your agent loads only when the skill is triggered. The skill folder holds 3 other files (for example `dependencies.md`, `publishing.md` and `registration.md`).
The licence is MIT.
When your agent uses it
- Adding a workspace package
- Making a private package publishable
- Renaming a package
- Moving its workspace path
Example prompts
- “/package-development”
Workflow steps
7 steps, taken from the first numbered list in SKILL.md.
- Inspect the closest package in the same family. Classify publication status,
- Create or move only required source, test, TypeScript, and manifest files.
- Read registration.md. Classify every registration surface
- For a published package, read publishing.md and verify its
- Run codegen when the package owns generated barrels, then inspect generated
- Run focused package tests and scripts plus applicable root checks. Include
- Apply root changeset, generated-file, documentation, and workflow routing.
What it can do on your machine
Read from SKILL.md and the folder at commit d21db42. 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.
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
Package Development loads about 490 tokens when it runs. Until then it costs about 42 tokens; SKILL.md has 235 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
The full file from foldkit/foldkit at commit d21db42, republished under its MIT licence (© foldkit). 235 words, ~490 tokens.
Download SKILL.mdSave it as
.claude/skills/package-development/SKILL.md (or your agent's skills folder). This skill also uses 3 other files; get the full folder from GitHub.- name
- package-development
- description
- Package registration. Use when adding a workspace package, making a private package publishable, renaming a package, or moving its workspace path.
Treat package work as a registration change, not a directory copy.
Workflow
- Inspect the closest package in the same family. Classify publication status, runtime, test environment, platform support, barrels, and dependency shape. Justify each proposed file by precedent or an explicit repository need. Continue when every proposed file is justified.
- Create or move only required source, test, TypeScript, and manifest files. When manifest dependencies change, read dependencies.md and classify every entry by role. Continue when pnpm discovers the intended name and manifests reference no absent file.
- Read registration.md. Classify every registration surface as applicable or not applicable and update every applicable surface. Continue when every surface is classified and old references are explained.
- For a published package, read publishing.md and verify its development and packed surfaces.
- Run codegen when the package owns generated barrels, then inspect generated sections rather than editing them manually. Continue when generated sections match source modules without manual edits.
- Run focused package tests and scripts plus applicable root checks. Include public API type tests when applicable. For published packages, build and dry pack the package as described in publishing.md. Continue when focused and root checks pass and the packed surface is intended.
- Apply root changeset, generated-file, documentation, and workflow routing.
The task is complete when package discovery, registration, generated output, validation, packed output, and changeset routing are all verified or reported as not applicable.
© foldkit, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
SKILL.md and 3 other files in repos/effect/.agents/skills/package-development of foldkit/foldkit.
- SKILL.md
- dependencies.md
- publishing.md
- registration.md
Open the folder on GitHubat commit d21db42
Compare with similar skills
Package Development 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 |
|---|---|---|---|---|---|---|
| Package Development this skillfoldkit/foldkit | 918 | — | ~490 | Automated safety check: Pass | MIT | |
| Ghost Private Feature FlagTryGhost/Ghost | 55k | — | ~486 | Automated safety check: Pass | MIT | |
| Private Company ResearchHKUDS/Vibe-Trading | 35k | — | ~3.5k | Automated safety check: Pass | MIT | |
| Configuring Zscaler Private Access For Ztnamukul975/Anthropic-Cybersecurity-Skills | 34k | — | ~2.9k | Automated safety check: Notes | Apache-2.0 | |
| Private GitHub Repo Searchykdojo/claude-code-tips | 10k | — | ~444 | Automated safety check: Pass | Custom licence | |
| Task Manager Registrationelastic/kibana | 21k | — | ~5.8k | Automated safety check: Pass | Custom licence |
Similar skills
Private Company Research
HKUDS/Vibe-Trading
Runs a six-lens research framework on pre-IPO and private companies, labels every data point by confidence, and produces a fair-value range, exit-path analysis and information-gap map.
Configuring Zscaler Private Access For Ztna
mukul975/Anthropic-Cybersecurity-Skills
Configures Zscaler Private Access (ZPA) to replace traditional VPN with zero trust network access by deploying App Connectors, defining application segments, configuring identity- and…
Private GitHub Repo Search
ykdojo/claude-code-tips
Full-text searches across every one of the user's GitHub repos, including private ones, using a local mirror and ripgrep instead of GitHub's own search.
- Official
Task Manager Registration
elastic/kibana
Register and schedule background tasks with the Kibana Task Manager plugin (@kbn/task-manager-plugin).
Private Company Research
xbtlin/ai-berkshire
Runs a team of parallel agents to research a company with no public listing, rebuilding its business model, finances and competition from scattered sources.
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Questions about Package Development
What does Package Development do?
Package registration. An agent skill from foldkit/foldkit. Package Development is an agent skill from foldkit/foldkit. Package registration.
When should I use Package Development?
Package Development fits situations like: adding a workspace package; making a private package publishable; renaming a package; moving its workspace path.
How do I install Package Development in Claude Code?
Run `npx skills add foldkit/foldkit --skill package-development -a claude-code`. Or copy the skill folder (repos/effect/.agents/skills/package-development in foldkit/foldkit) into .claude/skills/package-development in your project. Claude Code loads it when a task matches its description.
How do I install Package Development in Codex?
Run `npx skills add foldkit/foldkit --skill package-development -a codex`. Or copy the skill folder (repos/effect/.agents/skills/package-development in foldkit/foldkit) into .agents/skills/package-development in your project. Codex loads it when a task matches its description.
Can I use Package Development 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 foldkit/foldkit --skill package-development -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/package-development, .gemini/skills/package-development, .github/skills/package-development and .opencode/skills/package-development in your project.
What does Package Development need to run?
SKILL.md names no scripts, command-line tools or credentials: Package Development is instructions for the agent only.
Does Package Development 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 Package Development 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 Package Development use?
Package Development is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Package Development use?
About 490 tokens (SKILL.md is roughly 2k 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 Package Development?
Skills that share tags, products or a category with Package Development: Ghost Private Feature Flag (TryGhost/Ghost, 55k stars), Private Company Research (HKUDS/Vibe-Trading, 35k stars), Configuring Zscaler Private Access For Ztna (mukul975/Anthropic-Cybersecurity-Skills, 34k stars) and Private GitHub Repo Search (ykdojo/claude-code-tips, 10k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Package Development?
foldkit (a GitHub organization) maintains it in foldkit/foldkit, which has 918 GitHub stars. The repository holds 18 skills in this directory. The repository was last updated on October 8, 2026.
Source: foldkit/foldkit on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.