Vercel Composition Patterns
supabase/supabase
React composition patterns that scale. An agent skill from supabase/supabase.
A skill your agent uses when adding or changing log calls in a Common Lisp project that uses log4cl (the LOG package), when compilation fails with "Package LOG does not exist" in an ASDF…
Install Logging With Log4cl
$ npx skills add ultralisp/ultralisp --skill logging-with-log4cl -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install ultralisp/ultralisp logging-with-log4cl --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/ultralisp/ultralisp.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/logging-with-log4cl .claude/skills/logging-with-log4cl && 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 "logging-with-log4cl" agent skill from https://github.com/ultralisp/ultralisp/tree/master/.agents/skills/logging-with-log4cl into .claude/skills/logging-with-log4cl/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "logging-with-log4cl", 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/ultralisp/ultralisp/tree/master/.agents/skills/logging-with-log4clType 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 ultralisp/ultralisp --skill logging-with-log4cl -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install ultralisp/ultralisp logging-with-log4cl --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/ultralisp/ultralisp.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.agents/skills/logging-with-log4cl .agents/skills/logging-with-log4cl && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "logging-with-log4cl" agent skill from https://github.com/ultralisp/ultralisp/tree/master/.agents/skills/logging-with-log4cl into .agents/skills/logging-with-log4cl/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "logging-with-log4cl", 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 ultralisp/ultralisp --skill logging-with-log4cl -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install ultralisp/ultralisp logging-with-log4cl --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/ultralisp/ultralisp.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.agents/skills/logging-with-log4cl .cursor/skills/logging-with-log4cl && 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 "logging-with-log4cl" agent skill from https://github.com/ultralisp/ultralisp/tree/master/.agents/skills/logging-with-log4cl into .cursor/skills/logging-with-log4cl/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "logging-with-log4cl", 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/ultralisp/ultralisp.git --path .agents/skills/logging-with-log4cl--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 ultralisp/ultralisp --skill logging-with-log4cl -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install ultralisp/ultralisp logging-with-log4cl --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/ultralisp/ultralisp.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.agents/skills/logging-with-log4cl .gemini/skills/logging-with-log4cl && 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 "logging-with-log4cl" agent skill from https://github.com/ultralisp/ultralisp/tree/master/.agents/skills/logging-with-log4cl into .gemini/skills/logging-with-log4cl/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "logging-with-log4cl", 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 ultralisp/ultralisp logging-with-log4clInstalls 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 ultralisp/ultralisp --skill logging-with-log4cl -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/ultralisp/ultralisp.git skills-src && mkdir -p .github/skills && cp -r skills-src/.agents/skills/logging-with-log4cl .github/skills/logging-with-log4cl && 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 "logging-with-log4cl" agent skill from https://github.com/ultralisp/ultralisp/tree/master/.agents/skills/logging-with-log4cl into .github/skills/logging-with-log4cl/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "logging-with-log4cl", 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 ultralisp/ultralisp --skill logging-with-log4cl -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install ultralisp/ultralisp logging-with-log4cl --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/ultralisp/ultralisp.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.agents/skills/logging-with-log4cl .opencode/skills/logging-with-log4cl && 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 "logging-with-log4cl" agent skill from https://github.com/ultralisp/ultralisp/tree/master/.agents/skills/logging-with-log4cl into .opencode/skills/logging-with-log4cl/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "logging-with-log4cl", 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
logging-with-log4cl- GitHub stars
- 258
- Token cost
- ~832 tokens
- SKILL.md length
- 326 words
- Files
- 1
- Skills in repo
- 14
- Repo updated
- First seen
- Licence
- None found
At a glance
A skill your agent uses when adding or changing log calls in a Common Lisp project that uses log4cl (the LOG package), when compilation fails with "Package LOG does not exist" in an ASDF…
- Changing log calls in a Common Lisp project that uses log4cl (the LOG package)
- SKILL.md covers Overview, When to Use, Prefer log:info over format t and First argument is a format…, plus 3 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
- Compilation fails with Package LOG does not exist in an ASDF package-inferred system
What it does
Logging With Log4cl is an agent skill from ultralisp/ultralisp. Use when adding or changing log calls in a Common Lisp project that uses log4cl (the LOG package), when compilation fails with "Package LOG does not exist" in an ASDF package-inferred system, or when a log:info call with a path or tilde crashes or garbles at runtime.
Its SKILL.md is about 830 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. The repository describes itself as: The software behind a Ultralisp.org Common Lisp repository.
When your agent uses it
- Changing log calls in a Common Lisp project that uses log4cl (the LOG package)
- Compilation fails with Package LOG does not exist in an ASDF package-inferred system
- A log:info call with a path
- Garbles at runtime
Example prompts
- “Package LOG does not exist”
- “/logging-with-log4cl”
What it can do on your machine
Read from SKILL.md and the folder at commit 3439788. 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 lisp).
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
Logging With Log4cl loads about 832 tokens when it runs. Until then it costs about 72 tokens; SKILL.md has 326 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
Without a licence we can't republish the file, so here is its outline and opening line. It has 326 words (~832 tokens).
“log4cl exposes the LOG package (log:info, log:error, log:debug, …). These macros are cl:format-based: the first argument is a format control string and any further arguments are format args.”
- name
- logging-with-log4cl
Files
Just SKILL.md in .agents/skills/logging-with-log4cl of ultralisp/ultralisp.
Open the folder on GitHubat commit 3439788
Compare with similar skills
Logging With Log4cl 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 |
|---|---|---|---|---|---|---|
| Logging With Log4cl this skillultralisp/ultralisp | 258 | — | ~832 | Automated safety check: Pass | None | |
| Vercel Composition Patternssupabase/supabase | 111k | 58 repos | ~726 | Automated safety check: Pass | MIT | |
| Finishing a Development Branchobra/superpowers | 297k | 5 repos | ~1.9k | Automated safety check: Pass | MIT | |
| Typescript Advanced Typesrolling-scopes/rsschool-app | 10k | 25 repos | ~4.2k | Automated safety check: Pass | MPL-2.0 | |
| PR Babysitteropeninterpreter/openinterpreter | 69k | 3 repos | ~4.2k | Automated safety check: Pass | Apache-2.0 | |
| Code Review ChecklistshareAI-lab/learn-claude-code | 78k | 5 repos | ~1.1k | Automated safety check: Pass | MIT |
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Typescript Advanced Types
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Master TypeScript's advanced type system including generics, conditional types, mapped types, template literals, and utility types for building type-safe applications.
PR Babysitter
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Watches an open GitHub pull request until it merges, handling review comments, diagnosing CI failures and retrying flaky checks along the way.
Code Review Checklist
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Reviews code against a five-part checklist covering security, correctness, performance, maintainability and testing, and reports findings in a fixed format.
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Iteratively improves a PR (GitHub), MR (GitLab), or shelved changelist (Perforce) until Greptile gives it a 5/5 confidence score with zero unresolved comments.
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Related
Categories
Questions about Logging With Log4cl
What does Logging With Log4cl do?
A skill your agent uses when adding or changing log calls in a Common Lisp project that uses log4cl (the LOG package), when compilation fails with "Package LOG does not exist" in an ASDF…. Logging With Log4cl is an agent skill from ultralisp/ultralisp. Use when adding or changing log calls in a Common Lisp project that uses log4cl (the LOG package), when compilation fails with "Package LOG does not exist" in an ASDF package-inferred system, or when a log:info call with a path or tilde crashes or garbles at runtime.
When should I use Logging With Log4cl?
Logging With Log4cl fits situations like: changing log calls in a Common Lisp project that uses log4cl (the LOG package); compilation fails with Package LOG does not exist in an ASDF package-inferred system; A log:info call with a path; garbles at runtime.
How do I install Logging With Log4cl in Claude Code?
Run `npx skills add ultralisp/ultralisp --skill logging-with-log4cl -a claude-code`. Or copy the skill folder (.agents/skills/logging-with-log4cl in ultralisp/ultralisp) into .claude/skills/logging-with-log4cl in your project. Claude Code loads it when a task matches its description.
How do I install Logging With Log4cl in Codex?
Run `npx skills add ultralisp/ultralisp --skill logging-with-log4cl -a codex`. Or copy the skill folder (.agents/skills/logging-with-log4cl in ultralisp/ultralisp) into .agents/skills/logging-with-log4cl in your project. Codex loads it when a task matches its description.
Can I use Logging With Log4cl 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 ultralisp/ultralisp --skill logging-with-log4cl -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/logging-with-log4cl, .gemini/skills/logging-with-log4cl, .github/skills/logging-with-log4cl and .opencode/skills/logging-with-log4cl in your project.
What does Logging With Log4cl need to run?
SKILL.md names no scripts, command-line tools or credentials: Logging With Log4cl is instructions for the agent only.
Does Logging With Log4cl 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 Logging With Log4cl 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 Logging With Log4cl use?
No licence was found for Logging With Log4cl or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.
How many tokens does Logging With Log4cl use?
About 832 tokens (SKILL.md is roughly 3.3k 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 Logging With Log4cl?
Skills that share tags, products or a category with Logging With Log4cl: Vercel Composition Patterns (supabase/supabase, 111k stars), Finishing a Development Branch (obra/superpowers, 297k stars), Typescript Advanced Types (rolling-scopes/rsschool-app, 10k stars) and PR Babysitter (openinterpreter/openinterpreter, 69k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Logging With Log4cl?
ultralisp (a GitHub organization) maintains it in ultralisp/ultralisp, which has 258 GitHub stars. The repository holds 14 skills in this directory. The repository was last updated on September 13, 2026.
Source: ultralisp/ultralisp on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.