Fern Navigation
ai-dynamo/dynamo
Knowledge of Fern's site-level navigation and structure configuration — how a docs site is organized in docs.yml (and product/version .yml files) using sections, pages, folders, tabs, tab variants…
Fetch HexDocs for Elixir libraries with HTML-to-markdown conversion.
Install Hexdocs Fetcher
$ npx skills add oliver-kriska/claude-elixir-phoenix --skill hexdocs-fetcher -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install oliver-kriska/claude-elixir-phoenix hexdocs-fetcher --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/oliver-kriska/claude-elixir-phoenix.git skills-src && mkdir -p .claude/skills && cp -r skills-src/targets/pi/skills/hexdocs-fetcher .claude/skills/hexdocs-fetcher && 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 "hexdocs-fetcher" agent skill from https://github.com/oliver-kriska/claude-elixir-phoenix/tree/main/targets/pi/skills/hexdocs-fetcher into .claude/skills/hexdocs-fetcher/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "hexdocs-fetcher", 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/oliver-kriska/claude-elixir-phoenix/tree/main/targets/pi/skills/hexdocs-fetcherType 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 oliver-kriska/claude-elixir-phoenix --skill hexdocs-fetcher -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install oliver-kriska/claude-elixir-phoenix hexdocs-fetcher --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/oliver-kriska/claude-elixir-phoenix.git skills-src && mkdir -p .agents/skills && cp -r skills-src/targets/pi/skills/hexdocs-fetcher .agents/skills/hexdocs-fetcher && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "hexdocs-fetcher" agent skill from https://github.com/oliver-kriska/claude-elixir-phoenix/tree/main/targets/pi/skills/hexdocs-fetcher into .agents/skills/hexdocs-fetcher/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "hexdocs-fetcher", 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 oliver-kriska/claude-elixir-phoenix --skill hexdocs-fetcher -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install oliver-kriska/claude-elixir-phoenix hexdocs-fetcher --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/oliver-kriska/claude-elixir-phoenix.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/targets/pi/skills/hexdocs-fetcher .cursor/skills/hexdocs-fetcher && 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 "hexdocs-fetcher" agent skill from https://github.com/oliver-kriska/claude-elixir-phoenix/tree/main/targets/pi/skills/hexdocs-fetcher into .cursor/skills/hexdocs-fetcher/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "hexdocs-fetcher", 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/oliver-kriska/claude-elixir-phoenix.git --path targets/pi/skills/hexdocs-fetcher--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 oliver-kriska/claude-elixir-phoenix --skill hexdocs-fetcher -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install oliver-kriska/claude-elixir-phoenix hexdocs-fetcher --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/oliver-kriska/claude-elixir-phoenix.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/targets/pi/skills/hexdocs-fetcher .gemini/skills/hexdocs-fetcher && 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 "hexdocs-fetcher" agent skill from https://github.com/oliver-kriska/claude-elixir-phoenix/tree/main/targets/pi/skills/hexdocs-fetcher into .gemini/skills/hexdocs-fetcher/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "hexdocs-fetcher", 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 oliver-kriska/claude-elixir-phoenix hexdocs-fetcherInstalls 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 oliver-kriska/claude-elixir-phoenix --skill hexdocs-fetcher -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/oliver-kriska/claude-elixir-phoenix.git skills-src && mkdir -p .github/skills && cp -r skills-src/targets/pi/skills/hexdocs-fetcher .github/skills/hexdocs-fetcher && 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 "hexdocs-fetcher" agent skill from https://github.com/oliver-kriska/claude-elixir-phoenix/tree/main/targets/pi/skills/hexdocs-fetcher into .github/skills/hexdocs-fetcher/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "hexdocs-fetcher", 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 oliver-kriska/claude-elixir-phoenix --skill hexdocs-fetcher -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install oliver-kriska/claude-elixir-phoenix hexdocs-fetcher --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/oliver-kriska/claude-elixir-phoenix.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/targets/pi/skills/hexdocs-fetcher .opencode/skills/hexdocs-fetcher && 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 "hexdocs-fetcher" agent skill from https://github.com/oliver-kriska/claude-elixir-phoenix/tree/main/targets/pi/skills/hexdocs-fetcher into .opencode/skills/hexdocs-fetcher/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "hexdocs-fetcher", 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
hexdocs-fetcher- GitHub stars
- 565
- Token cost
- ~826 tokens
- SKILL.md length
- 169 words
- Files
- 1
- Skills in repo
- 111
- Repo updated
- First seen
- Licence
- MIT
At a glance
Fetch HexDocs for Elixir libraries with HTML-to-markdown conversion.
- Works in 3 steps: NEVER fetch entire HexDocs sites —… → Use focused prompts — generic fetches… → Prefer Tidewave when available — exact…
- Looking up docs on hexdocs.pm — modules
- SKILL.md covers Usage, Token Efficiency, Integration with… and Common HexDocs URLs, plus 4 more sections
- Reaches hexdocs.pm
What it does
Hexdocs Fetcher is an agent skill from oliver-kriska/claude-elixir-phoenix. Fetch HexDocs for Elixir libraries with HTML-to-markdown conversion. Use when looking up docs on hexdocs.pm — modules, functions, guides, changelogs.
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, covering Markdown and Changelog and release notes. It works with Elixir. The repository describes itself as: Claude Code plugin for Elixir/Phoenix/LiveView — 26 specialist agents, Iron Laws enforcement, and Tidewave MCP integration. Plan features with parallel research agents, execute… The licence is MIT.
When your agent uses it
- Looking up docs on hexdocs.pm — modules
- Tasks that involve Markdown
- Tasks that involve Changelog and release notes
Example prompts
- “/hexdocs-fetcher”
Workflow steps
3 steps, taken from the first numbered list in SKILL.md.
- NEVER fetch entire HexDocs sites — always target specific modules or guides
- Use focused prompts — generic fetches waste tokens; specify what to extract
- Prefer Tidewave when available — exact version match beats generic hexdocs.pm
What it can do on your machine
Read from SKILL.md and the folder at commit 9767a82. 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
Hosts in commands or code, which the agent is likely to contact:
hexdocs.pm
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
Hexdocs Fetcher loads about 826 tokens when it runs. Until then it costs about 41 tokens; SKILL.md has 169 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 oliver-kriska/claude-elixir-phoenix at commit 9767a82, republished under its MIT licence (© oliver-kriska). 169 words, ~826 tokens.
Download SKILL.mdSave it as
.claude/skills/hexdocs-fetcher/SKILL.md (or your agent's skills folder).- name
- hexdocs-fetcher
- description
- Fetch HexDocs for Elixir libraries with HTML-to-markdown conversion. Use when looking up docs on hexdocs.pm — modules, functions, guides, changelogs.
HexDocs Fetcher
Efficiently fetch Elixir library documentation from hexdocs.pm using Claude Code's native WebFetch tool.
Usage
When researching libraries, use WebFetch:
# Fetch library overview
WebFetch(
url: "https://hexdocs.pm/oban",
prompt: "Extract the main documentation, including module overview, installation instructions, and key functions. Format as clean markdown."
)
# Fetch specific module docs
WebFetch(
url: "https://hexdocs.pm/phoenix_live_view/Phoenix.LiveView.html",
prompt: "Extract the module documentation including all public functions, their specs, and examples."
)
# Fetch getting started guide
WebFetch(
url: "https://hexdocs.pm/ecto/getting-started.html",
prompt: "Extract the complete getting started guide content."
)Token Efficiency
WebFetch automatically converts HTML to markdown and extracts relevant content:
| Source | Raw HTML | With WebFetch | Benefit |
|---|---|---|---|
| HexDocs page | ~80k tokens | ~15k tokens | 80% reduction |
| Phoenix docs | ~120k tokens | ~25k tokens | 79% reduction |
| README | ~20k tokens | ~8k tokens | 60% reduction |
Integration with hex-library-researcher
When evaluating libraries, fetch docs efficiently:
# Get library overview with focused extraction
WebFetch(
url: "https://hexdocs.pm/oban",
prompt: "Extract: 1) Installation instructions 2) Main features 3) Basic usage example"
)Common HexDocs URLs
# Library overview
https://hexdocs.pm/{library}
# Module documentation
https://hexdocs.pm/{library}/{Module}.html
https://hexdocs.pm/{library}/{Module.Submodule}.html
# Guides
https://hexdocs.pm/{library}/guides.html
https://hexdocs.pm/{library}/{guide-name}.html
# API reference
https://hexdocs.pm/{library}/api-reference.htmlPrompt Strategies
Use focused prompts for better extraction:
# For API docs
prompt: "Extract all public function docs with @spec and examples"
# For guides
prompt: "Extract the complete guide content preserving code examples"
# For troubleshooting
prompt: "Extract any troubleshooting sections, common errors, and FAQs"
# For configuration
prompt: "Extract configuration options and their defaults"Caching
WebFetch includes automatic 15-minute caching. When fetching the same URL multiple times in a session, results are cached automatically.
For longer persistence, save to planning directory:
# After fetching, write the result to a file
Write(
file_path: ".claude/plans/{slug}/research/docs/oban.md",
content: "{extracted content}"
)Tidewave Alternative
If Tidewave MCP is available, prefer mcp__tidewave__get_docs for exact version-matched documentation:
mcp__tidewave__get_docs(module: "Oban.Worker")This fetches docs for the exact version in your mix.lock.
Iron Laws
- NEVER fetch entire HexDocs sites — always target specific modules or guides
- Use focused prompts — generic fetches waste tokens; specify what to extract
- Prefer Tidewave when available — exact version match beats generic hexdocs.pm
© oliver-kriska, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
Just SKILL.md in targets/pi/skills/hexdocs-fetcher of oliver-kriska/claude-elixir-phoenix.
Open the folder on GitHubat commit 9767a82
Compare with similar skills
Hexdocs Fetcher 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 |
|---|---|---|---|---|---|---|
| Hexdocs Fetcher this skilloliver-kriska/claude-elixir-phoenix | 565 | — | ~826 | Automated safety check: Pass | MIT | |
| Fern Navigationai-dynamo/dynamo | 8.3k | — | ~2.2k | Automated safety check: Pass | Apache-2.0 | |
| Changelog Writerjihe520/mindpocket | 350 | — | ~1.1k | Automated safety check: Pass | None | |
| MCP Apps Sync Docsapollographql/apollo-mcp-server | 313 | — | ~1.2k | Automated safety check: Pass | MIT | |
| Whatsnewmicrosoft/aspire.dev | 196 | — | ~1.9k | Automated safety check: Pass | MIT | |
| Changelog Entrieshugodemenez/deltalytix | 159 | — | ~1.8k | Automated safety check: Pass | Custom licence |
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MCP Apps Sync Docs
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Whatsnew
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Questions about Hexdocs Fetcher
What does Hexdocs Fetcher do?
Fetch HexDocs for Elixir libraries with HTML-to-markdown conversion. Hexdocs Fetcher is an agent skill from oliver-kriska/claude-elixir-phoenix. Fetch HexDocs for Elixir libraries with HTML-to-markdown conversion.
When should I use Hexdocs Fetcher?
Hexdocs Fetcher fits situations like: looking up docs on hexdocs.pm — modules; tasks that involve Markdown; tasks that involve Changelog and release notes.
How do I install Hexdocs Fetcher in Claude Code?
Run `npx skills add oliver-kriska/claude-elixir-phoenix --skill hexdocs-fetcher -a claude-code`. Or copy the skill folder (targets/pi/skills/hexdocs-fetcher in oliver-kriska/claude-elixir-phoenix) into .claude/skills/hexdocs-fetcher in your project. Claude Code loads it when a task matches its description.
How do I install Hexdocs Fetcher in Codex?
Run `npx skills add oliver-kriska/claude-elixir-phoenix --skill hexdocs-fetcher -a codex`. Or copy the skill folder (targets/pi/skills/hexdocs-fetcher in oliver-kriska/claude-elixir-phoenix) into .agents/skills/hexdocs-fetcher in your project. Codex loads it when a task matches its description.
Can I use Hexdocs Fetcher 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 oliver-kriska/claude-elixir-phoenix --skill hexdocs-fetcher -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/hexdocs-fetcher, .gemini/skills/hexdocs-fetcher, .github/skills/hexdocs-fetcher and .opencode/skills/hexdocs-fetcher in your project.
What does Hexdocs Fetcher need to run?
SKILL.md names no scripts, command-line tools or credentials: Hexdocs Fetcher is instructions for the agent only.
Does Hexdocs Fetcher access the network?
SKILL.md names 1 domain. In commands or code: hexdocs.pm; the agent is likely to contact it when it follows the instructions. This is read from the text; nothing was executed.
Is Hexdocs Fetcher 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 Hexdocs Fetcher use?
Hexdocs Fetcher 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 Hexdocs Fetcher use?
About 826 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 Hexdocs Fetcher?
Skills that share tags, products or a category with Hexdocs Fetcher: Fern Navigation (ai-dynamo/dynamo, 8.3k stars), Changelog Writer (jihe520/mindpocket, 350 stars), MCP Apps Sync Docs (apollographql/apollo-mcp-server, 313 stars) and Whatsnew (microsoft/aspire.dev, 196 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Hexdocs Fetcher?
oliver-kriska (a GitHub user) maintains it in oliver-kriska/claude-elixir-phoenix, which has 565 GitHub stars. The repository holds 111 skills in this directory. The repository was last updated on October 5, 2026.
Source: oliver-kriska/claude-elixir-phoenix on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.