Agent skill

Clearing Asdf Fasl Cache

by ultralisp in ultralisp/ultralisp

A skill your agent uses when ASDF fasl cache is stale and build tools (build-docs, qlot exec sbcl, etc.) do not pick up source changes — typically after modifying docstrings, adding defgeneric…

No licenceAuto-check passedDevelopment

Install Clearing Asdf Fasl Cache

skills CLI
$ npx skills add ultralisp/ultralisp --skill clearing-asdf-fasl-cache -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install ultralisp/ultralisp clearing-asdf-fasl-cache --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/ultralisp/ultralisp.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/clearing-asdf-fasl-cache .claude/skills/clearing-asdf-fasl-cache && rm -rf skills-src

Use ~/.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/

Facts

Skill name
clearing-asdf-fasl-cache
GitHub stars
258
Token cost
~505 tokens
SKILL.md length
218 words
Files
2
Skills in repo
14
Repo updated
First seen
Licence
None found

At a glance

A skill your agent uses when ASDF fasl cache is stale and build tools (build-docs, qlot exec sbcl, etc.) do not pick up source changes — typically after modifying docstrings, adding defgeneric…

  • ASDF fasl cache is stale and build tools (build-docs
  • SKILL.md covers Overview, When to Use, Usage and Common Issues
  • Runs Shell scripts from its folder
  • Etc.) do not pick up source changes — typically after modifying docstrings

What it does

Clearing Asdf Fasl Cache is an agent skill from ultralisp/ultralisp. Use when ASDF fasl cache is stale and build tools (build-docs, qlot exec sbcl, etc.) do not pick up source changes — typically after modifying docstrings, adding defgeneric forms, or renaming exported symbols. Apply when recompilation shows no effect or warnings persist after source fixes.

Its SKILL.md is about 510 tokens, which your agent loads only when the skill is triggered. The skill folder holds 1 other file (for example `clear-fasl-cache.sh`).

It sits in Development, covering Technical documentation. The repository describes itself as: The software behind a Ultralisp.org Common Lisp repository.

When your agent uses it

  • ASDF fasl cache is stale and build tools (build-docs
  • Etc.) do not pick up source changes — typically after modifying docstrings
  • Adding defgeneric forms
  • Renaming exported symbols

Example prompts

  • “/clearing-asdf-fasl-cache”

Requirements

  • A Bash shell

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

    Ships script files (Shell), which the agent can run.

    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

Clearing Asdf Fasl Cache loads about 505 tokens when it runs. Until then it costs about 79 tokens; SKILL.md has 218 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~79
When it runs · the whole SKILL.md, loaded when a task matches
~505

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 218 words (~505 tokens).

“ASDF compiles .lisp sources to .fasl (Fast-Load) files and caches them in ~/.cache/common-lisp/. When source files change but tools use stale fasls, changes appear to have no effect. The fix is to delete the cache for the project using the…”

— opening of SKILL.md by ultralisp
name
clearing-asdf-fasl-cache

Read the full SKILL.md on GitHub

Files

SKILL.md and 1 other file in .agents/skills/clearing-asdf-fasl-cache of ultralisp/ultralisp.

  • SKILL.md
  • clear-fasl-cache.sh

Open the folder on GitHubat commit 3439788

Compare with similar skills

Clearing Asdf Fasl Cache 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.

Clearing Asdf Fasl Cache compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Clearing Asdf Fasl Cache this skillultralisp/ultralisp258—~505Automated safety check: PassNone
Diagram Designcathrynlavery/diagram-design48k1 repos~7.6kAutomated safety check: PassMIT
Simple Englishmoeru-ai/airi50k2 repos~4.6kAutomated safety check: PassMIT
Doc SyncJetBrains/ideavim10k2 repos~2.6kAutomated safety check: PassMIT
Mailspring App ScreenshotsFoundry376/Mailspring18k—~1.5kAutomated safety check: PassGPL-3.0
Draw.io Diagram StudioAgents365-ai/drawio-skill10k—~2.4kAutomated safety check: NotesMIT

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Categories

Questions about Clearing Asdf Fasl Cache

What does Clearing Asdf Fasl Cache do?

A skill your agent uses when ASDF fasl cache is stale and build tools (build-docs, qlot exec sbcl, etc.) do not pick up source changes — typically after modifying docstrings, adding defgeneric…. Clearing Asdf Fasl Cache is an agent skill from ultralisp/ultralisp.) do not pick up source changes — typically after modifying docstrings, adding defgeneric forms, or renaming exported symbols.

When should I use Clearing Asdf Fasl Cache?

Clearing Asdf Fasl Cache fits situations like: ASDF fasl cache is stale and build tools (build-docs; etc.) do not pick up source changes — typically after modifying docstrings; adding defgeneric forms; renaming exported symbols.

How do I install Clearing Asdf Fasl Cache in Claude Code?

Run `npx skills add ultralisp/ultralisp --skill clearing-asdf-fasl-cache -a claude-code`. Or copy the skill folder (.agents/skills/clearing-asdf-fasl-cache in ultralisp/ultralisp) into .claude/skills/clearing-asdf-fasl-cache in your project. Claude Code loads it when a task matches its description.

How do I install Clearing Asdf Fasl Cache in Codex?

Run `npx skills add ultralisp/ultralisp --skill clearing-asdf-fasl-cache -a codex`. Or copy the skill folder (.agents/skills/clearing-asdf-fasl-cache in ultralisp/ultralisp) into .agents/skills/clearing-asdf-fasl-cache in your project. Codex loads it when a task matches its description.

Can I use Clearing Asdf Fasl Cache 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 clearing-asdf-fasl-cache -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/clearing-asdf-fasl-cache, .gemini/skills/clearing-asdf-fasl-cache, .github/skills/clearing-asdf-fasl-cache and .opencode/skills/clearing-asdf-fasl-cache in your project.

What does Clearing Asdf Fasl Cache need to run?

Going by SKILL.md and its folder, Clearing Asdf Fasl Cache needs a shell for the scripts in its folder. Our summary lists: A Bash shell.

Does Clearing Asdf Fasl Cache 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 Clearing Asdf Fasl Cache 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 Clearing Asdf Fasl Cache use?

No licence was found for Clearing Asdf Fasl Cache or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.

How many tokens does Clearing Asdf Fasl Cache use?

About 505 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 Clearing Asdf Fasl Cache?

Skills that share tags, products or a category with Clearing Asdf Fasl Cache: Diagram Design (cathrynlavery/diagram-design, 48k stars), Simple English (moeru-ai/airi, 50k stars), Doc Sync (JetBrains/ideavim, 10k stars) and Mailspring App Screenshots (Foundry376/Mailspring, 18k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Clearing Asdf Fasl Cache?

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.