Agent skill

Webarchive

by robrohan in robrohan/WebArchiveExtractor

Extract .webarchive files (saved from Safari) into plain HTML/assets using the WebArchiveExtractor CLI.

Custom licenceAuto-check passed

Install Webarchive

skills CLI
$ npx skills add robrohan/WebArchiveExtractor --skill webarchive -a claude-code

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

GitHub CLI
$ gh skill install robrohan/WebArchiveExtractor webarchive --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/robrohan/WebArchiveExtractor.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/webarchive .claude/skills/webarchive && 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
webarchive
GitHub stars
346
Token cost
~852 tokens
SKILL.md length
371 words
Files
1
Skills in repo
1
Repo updated
First seen
Licence
Custom licence

At a glance

Extract .webarchive files (saved from Safari) into plain HTML/assets using the WebArchiveExtractor CLI.

  • Works in 7 steps: Check the binary exists using the test… → Determine the input .webarchive file… → Determine the output directory → …
  • The user wants to unarchive
  • SKILL.md covers How to run WebArchiveExtractor, Prerequisites, Steps and Notes
  • Calls xcodebuild

What it does

Webarchive is an agent skill from robrohan/WebArchiveExtractor. Extract .webarchive files (saved from Safari) into plain HTML/assets using the WebArchiveExtractor CLI. Use when the user wants to unarchive, extract, or convert a .webarchive file.

Its SKILL.md is about 850 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It works with macOS. The repository describes itself as: Mac OS X utility to un-archive .webarchive files (like when saving from Safari).

When your agent uses it

  • The user wants to unarchive
  • Convert a .webarchive file

Example prompts

  • “/webarchive”

Workflow steps

7 steps, taken from the first numbered list in SKILL.md.

  1. Check the binary exists using the test command above. If not found, stop and direct the user to install the app.
  2. Determine the input .webarchive file from $ARGUMENTS or ask the user.
  3. Determine the output directory
  4. Determine (optional) URL prepend from $ARGUMENTS or ask if needed.
  5. Run the extractor using the Bash tool
  6. If successful, list the output directory contents with ls and summarise
  7. Offer to open the extracted HTML in the browser with open .

What it can do on your machine

Read from SKILL.md and the folder at commit 7fa2857. 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

    Shell commands in SKILL.md call:

    • xcodebuild

    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

Webarchive loads about 852 tokens when it runs. Until then it costs about 48 tokens; SKILL.md has 371 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~48
When it runs · the whole SKILL.md, loaded when a task matches
~852

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 371 words (~852 tokens).

“The user wants to extract a .webarchive file using WebArchiveExtractor.”

— opening of SKILL.md by robrohan, Custom licence
name
webarchive

Read the full SKILL.md on GitHub

Files

Just SKILL.md in skills/webarchive of robrohan/WebArchiveExtractor.

Open the folder on GitHubat commit 7fa2857

Compare with similar skills

Webarchive 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.

Webarchive compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Webarchive this skillrobrohan/WebArchiveExtractor346—~852Automated safety check: PassCustom licence
Site ArchitectureAvdLee/RocketSimApp80311 repos~3.3kAutomated safety check: PassCustom licence
Engine Whats Newflutter/flutter179k—~978Automated safety check: PassBSD-3-Clause
macOS Spm App PackagingDimillian/Skills4k5 repos~1.2kAutomated safety check: PassMIT
Openclaw Live Updateropenclaw/openclaw392k—~3.7kAutomated safety check: PassMIT
Orca iOS Simulator Controlstablyai/orca87k1 repos~584Automated safety check: PassApache-2.0

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    Generates the "what's new" release summary and diff file for changes in the Flutter engine (//engine/src/flutter) between two releases (e.g., 3.47 vs 3.44).

    179k GitHub stars~978 tokensUpdated today
    MobileAuto-check passed
  • macOS Spm App Packaging

    Dimillian/Skills

    Scaffold, build, and package SwiftPM-based macOS apps without an Xcode project.

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    Maintain the canonical live OpenClaw main checkout, macOS LaunchAgent-managed Gateway, local macOS app, exact-head main CI, and recurring full release validation.

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Works with

Questions about Webarchive

What does Webarchive do?

Extract .webarchive files (saved from Safari) into plain HTML/assets using the WebArchiveExtractor CLI. Webarchive is an agent skill from robrohan/WebArchiveExtractor.webarchive files (saved from Safari) into plain HTML/assets using the WebArchiveExtractor CLI.

When should I use Webarchive?

Webarchive fits situations like: the user wants to unarchive; convert a .webarchive file.

How do I install Webarchive in Claude Code?

Run `npx skills add robrohan/WebArchiveExtractor --skill webarchive -a claude-code`. Or copy the skill folder (skills/webarchive in robrohan/WebArchiveExtractor) into .claude/skills/webarchive in your project. Claude Code loads it when a task matches its description.

How do I install Webarchive in Codex?

Run `npx skills add robrohan/WebArchiveExtractor --skill webarchive -a codex`. Or copy the skill folder (skills/webarchive in robrohan/WebArchiveExtractor) into .agents/skills/webarchive in your project. Codex loads it when a task matches its description.

Can I use Webarchive 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 robrohan/WebArchiveExtractor --skill webarchive -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/webarchive, .gemini/skills/webarchive, .github/skills/webarchive and .opencode/skills/webarchive in your project.

What does Webarchive need to run?

Going by SKILL.md and its folder, Webarchive needs the command-line tools its instructions call (xcodebuild).

Does Webarchive 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 Webarchive 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 Webarchive use?

Webarchive 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 Webarchive use?

About 852 tokens (SKILL.md is roughly 3.4k 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 Webarchive?

Skills that share tags, products or a category with Webarchive: Site Architecture (AvdLee/RocketSimApp, 803 stars), Engine Whats New (flutter/flutter, 179k stars), macOS Spm App Packaging (Dimillian/Skills, 4k stars) and Openclaw Live Updater (openclaw/openclaw, 392k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Webarchive?

robrohan (a GitHub user) maintains it in robrohan/WebArchiveExtractor, which has 346 GitHub stars. The repository was last updated on March 20, 2026.

Source: robrohan/WebArchiveExtractor on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.