Mole Bug Patterns
tw93/Mole
A catalog of recurring bug shapes in the Mole Mac cleaner, used to review safety-sensitive diffs for deletion safety, unbounded commands, shell traps and weak tests.
A skill your agent uses whenever working in a repository that uses Effect, even if the current task is in a new file or the user does not explicitly ask for Effect help.
Install Effect TS
$ npx skills add arcboxlabs/linkcode --skill effect-ts -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install arcboxlabs/linkcode effect-ts --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/arcboxlabs/linkcode.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/effect-ts .claude/skills/effect-ts && 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 "effect-ts" agent skill from https://github.com/arcboxlabs/linkcode/tree/master/.agents/skills/effect-ts into .claude/skills/effect-ts/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "effect-ts", 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/arcboxlabs/linkcode/tree/master/.agents/skills/effect-tsType 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 arcboxlabs/linkcode --skill effect-ts -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install arcboxlabs/linkcode effect-ts --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/arcboxlabs/linkcode.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.agents/skills/effect-ts .agents/skills/effect-ts && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "effect-ts" agent skill from https://github.com/arcboxlabs/linkcode/tree/master/.agents/skills/effect-ts into .agents/skills/effect-ts/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "effect-ts", 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 arcboxlabs/linkcode --skill effect-ts -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install arcboxlabs/linkcode effect-ts --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/arcboxlabs/linkcode.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.agents/skills/effect-ts .cursor/skills/effect-ts && 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 "effect-ts" agent skill from https://github.com/arcboxlabs/linkcode/tree/master/.agents/skills/effect-ts into .cursor/skills/effect-ts/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "effect-ts", 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/arcboxlabs/linkcode.git --path .agents/skills/effect-ts--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 arcboxlabs/linkcode --skill effect-ts -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install arcboxlabs/linkcode effect-ts --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/arcboxlabs/linkcode.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.agents/skills/effect-ts .gemini/skills/effect-ts && 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 "effect-ts" agent skill from https://github.com/arcboxlabs/linkcode/tree/master/.agents/skills/effect-ts into .gemini/skills/effect-ts/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "effect-ts", 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 arcboxlabs/linkcode effect-tsInstalls 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 arcboxlabs/linkcode --skill effect-ts -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/arcboxlabs/linkcode.git skills-src && mkdir -p .github/skills && cp -r skills-src/.agents/skills/effect-ts .github/skills/effect-ts && 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 "effect-ts" agent skill from https://github.com/arcboxlabs/linkcode/tree/master/.agents/skills/effect-ts into .github/skills/effect-ts/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "effect-ts", 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 arcboxlabs/linkcode --skill effect-ts -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install arcboxlabs/linkcode effect-ts --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/arcboxlabs/linkcode.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.agents/skills/effect-ts .opencode/skills/effect-ts && 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 "effect-ts" agent skill from https://github.com/arcboxlabs/linkcode/tree/master/.agents/skills/effect-ts into .opencode/skills/effect-ts/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "effect-ts", 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
effect-ts- GitHub stars
- 155
- Token cost
- ~2.5k tokens
- SKILL.md length
- 1,180 words
- Files
- 12 (incl. references)
- Skills in repo
- 4
- Repo updated
- First seen
- Licence
- Custom licence
At a glance
A skill your agent uses whenever working in a repository that uses Effect, even if the current task is in a new file or the user does not explicitly ask for Effect help.
- Works in 3 steps: Local skill guides first. Start with the… → Codebase patterns second. Examine… → Effect source code last. For gaps in the…
- Working in a repository that uses Effect
- SKILL.md covers Prerequisite, Research Strategy, Effect Principles and Installation, plus 1 more section
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Effect TS is an agent skill from arcboxlabs/linkcode. Use this skill whenever working in a repository that uses Effect, even if the current task is in a new file or the user does not explicitly ask for Effect help. Apply it to any work that should follow the repository's Effect patterns, conventions, architecture, or supporting tooling. Also use it for questions about Effect patterns, services, layers, schemas, streams, runtimes, or typed error handling.
Its SKILL.md is about 2.5k tokens, which your agent loads only when the skill is triggered. The skill folder holds 12 other files, including reference files (for example `references/features.md`, `references/guide-effect.md` and `references/guide-error-handling.md`).
It sits in Development, covering Error handling. The repository describes itself as: Open-source alternative to Codex App / Workbuddy, supporting Codex, Claude Code, OpenCode, Pi, and Grok Build. Codex App / WorkBuddy 的开源平替，支持 Codex、Claude Code、OpenCode、Pi 和 Grok…
When your agent uses it
- Working in a repository that uses Effect
- Even if the current task is in a new file
- The user does not explicitly ask for Effect help
- Questions about Effect patterns
Example prompts
- “/effect-ts”
Requirements
- Node.js
Workflow steps
3 steps, taken from the first numbered list in SKILL.md.
- Local skill guides first. Start with the relevant files in ./references/ before doing deeper research.
- Codebase patterns second. Examine similar patterns in the current project before implementing. If Effect patterns already exist, follow…
- Effect source code last. For gaps in the guides, complex type errors, unclear behavior, or implementation details, examine the vendored…
What it can do on your machine
Read from SKILL.md and the folder at commit 22c337f. 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
Effect TS loads about 2.5k tokens when it runs, and up to ~50k if it reads all its reference files. Until then it costs about 104 tokens; SKILL.md has 1,180 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 1,180 words (~2,474 tokens).
“Expert guidance for programming with the Effect library, covering error handling, dependency injection, composability, and testing patterns.”
- name
- effect-ts
Files
SKILL.md and 11 other files (references) in .agents/skills/effect-ts of arcboxlabs/linkcode.
- SKILL.md
- references/features.md
- references/guide-effect.md
- references/guide-error-handling.md
- references/guide-layers.md
- references/guide-observability.md
- references/guide-retries.md
- references/guide-schedule.md
- references/guide-schema.md
- references/guide-sql.md
- references/guide-testing.md
- references/setup.md
Open the folder on GitHubat commit 22c337f
Compare with similar skills
Effect TS 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 |
|---|---|---|---|---|---|---|
| Effect TS this skillarcboxlabs/linkcode | 155 | — | ~2.5k | Automated safety check: Pass | Custom licence | |
| Mole Bug Patternstw93/Mole | 69k | — | ~2k | Automated safety check: Pass | GPL-3.0 | |
| Native Data FetchingCherryHQ/cherry-studio-app | 4k | 6 repos | ~2.9k | Automated safety check: Notes | MIT | |
| Rust Best Practicesfarm-fe/farm | 5.6k | 3 repos | ~1.1k | Automated safety check: Pass | MIT | |
| R Function Input Validationtidyverse/dplyr | 5.1k | 1 repos | ~2.3k | Automated safety check: Pass | Custom licence | |
| Error Handlingmicrosoft/data-formulator | 18k | — | ~3.8k | Automated safety check: Pass | MIT |
Similar skills
Native Data Fetching
CherryHQ/cherry-studio-app
A skill your agent uses when implementing or debugging ANY network request, API call, or data fetching.
Rust Best Practices
farm-fe/farm
Guide for writing idiomatic Rust code based on Apollo GraphQL's best practices handbook.
R Function Input Validation
tidyverse/dplyr
Validates arguments of exported R functions with the standalone check_* type checkers from rlang, in tidyverse style with clear error messages.
- Official
Error Handling
microsoft/data-formulator
统一错误处理系统。在添加 API 端点、修改错误处理、添加前端 API 调用、编写错误相关测试时使用. An agent skill from microsoft/data-formulator.
Effect Client Wrapper
UsefulSoftwareCo/executor
Pattern for wrapping third-party SDK clients (Stripe, Resend, AWS, etc.) with Effect.
More from arcboxlabs/linkcode
Expo UI
arcboxlabs/linkcode
Framework (OSS). An agent skill from arcboxlabs/linkcode.
Expo Native UI
arcboxlabs/linkcode
Framework (OSS). An agent skill from arcboxlabs/linkcode.
Linear
arcboxlabs/linkcode
ArcBox's Linear workflow. An agent skill from arcboxlabs/linkcode.
Related
Categories
Questions about Effect TS
What does Effect TS do?
A skill your agent uses whenever working in a repository that uses Effect, even if the current task is in a new file or the user does not explicitly ask for Effect help. Effect TS is an agent skill from arcboxlabs/linkcode. Use this skill whenever working in a repository that uses Effect, even if the current task is in a new file or the user does not explicitly ask for Effect help.
When should I use Effect TS?
Effect TS fits situations like: working in a repository that uses Effect; even if the current task is in a new file; the user does not explicitly ask for Effect help; questions about Effect patterns.
How do I install Effect TS in Claude Code?
Run `npx skills add arcboxlabs/linkcode --skill effect-ts -a claude-code`. Or copy the skill folder (.agents/skills/effect-ts in arcboxlabs/linkcode) into .claude/skills/effect-ts in your project. Claude Code loads it when a task matches its description.
How do I install Effect TS in Codex?
Run `npx skills add arcboxlabs/linkcode --skill effect-ts -a codex`. Or copy the skill folder (.agents/skills/effect-ts in arcboxlabs/linkcode) into .agents/skills/effect-ts in your project. Codex loads it when a task matches its description.
Can I use Effect TS 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 arcboxlabs/linkcode --skill effect-ts -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/effect-ts, .gemini/skills/effect-ts, .github/skills/effect-ts and .opencode/skills/effect-ts in your project.
What does Effect TS need to run?
SKILL.md names no scripts, command-line tools or credentials: Effect TS is instructions for the agent only. Our summary lists: Node.js.
Does Effect TS 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 Effect TS 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 Effect TS use?
Effect TS 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 Effect TS use?
About 2.5k tokens (SKILL.md is roughly 9.9k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 47k tokens, read only when the agent opens those files.
What are the alternatives to Effect TS?
Skills that share tags, products or a category with Effect TS: Mole Bug Patterns (tw93/Mole, 69k stars), Native Data Fetching (CherryHQ/cherry-studio-app, 4k stars), Rust Best Practices (farm-fe/farm, 5.6k stars) and R Function Input Validation (tidyverse/dplyr, 5.1k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Effect TS?
arcboxlabs (a GitHub organization) maintains it in arcboxlabs/linkcode, which has 155 GitHub stars. The repository holds 4 skills in this directory. The repository was last updated on September 28, 2026.
Source: arcboxlabs/linkcode on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.