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Agent skill

Phx Research

by oliver-kriska in oliver-kriska/claude-elixir-phoenix

Research Elixir/Phoenix/Ecto topics or evaluate Hex libraries; Use when learning about libraries, patterns…

MITAuto-check passedAI & LLM Engineering

Install Phx Research

skills CLI
$ npx skills add oliver-kriska/claude-elixir-phoenix --skill phx-research -a claude-code

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

GitHub CLI
$ gh skill install oliver-kriska/claude-elixir-phoenix phx-research --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/oliver-kriska/claude-elixir-phoenix.git skills-src && mkdir -p .claude/skills && cp -r skills-src/targets/codex/skills/phx-research .claude/skills/phx-research && 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
phx-research
GitHub stars
565
Token cost
~823 tokens
SKILL.md length
408 words
Files
2 (incl. references)
Skills in repo
109
Repo updated
First seen
Licence
MIT

At a glance

Research Elixir/Phoenix/Ecto topics or evaluate Hex libraries; Use when learning about libraries, patterns…

  • Works in 6 steps: Pre-flight → Decompose the question → Gather sources → …
  • Learning about libraries
  • SKILL.md covers Usage, Arguments, Iron Laws and Library Evaluation Mode, plus 1 more section
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Phx Research is an agent skill from oliver-kriska/claude-elixir-phoenix. Research Elixir/Phoenix/Ecto topics or evaluate Hex libraries; Use when learning about libraries, patterns…

Its SKILL.md is about 820 tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files, including reference files (for example `references/library-evaluation.md`).

It sits in AI & LLM Engineering, covering LLM observability. 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

  • Learning about libraries
  • Tasks that involve LLM observability

Example prompts

  • “/phx-research”

Workflow steps

6 steps, taken from the step headings in SKILL.md.

  1. Pre-flight
  2. Decompose the question
  3. Gather sources
  4. Extract and synthesize
  5. Write one durable result
  6. Stop after research

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

    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

Phx Research loads about 823 tokens when it runs, and up to ~1.3k if it reads all its reference files. Until then it costs about 30 tokens; SKILL.md has 408 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~30
When it runs · the whole SKILL.md, loaded when a task matches
~823
With references · SKILL.md plus every file in references/, read only if the agent opens them
~1.3k

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). 408 words, ~823 tokens.

Download SKILL.mdSave it as .claude/skills/phx-research/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.
name
phx-research
description
Research Elixir/Phoenix/Ecto topics or evaluate Hex libraries; Use when learning about libraries, patterns…

Research Elixir Topic

Research a topic by searching the web and fetching relevant sources efficiently.

Usage

$elixir-phoenix:phx-research Oban unique jobs best practices
$elixir-phoenix:phx-research LiveView file upload with progress
$elixir-phoenix:phx-research --library permit

Arguments

the text after the skill name = Research topic/question. Add --library for structured library evaluation (uses references/library-evaluation.md template).

Iron Laws

  1. Write output to file, never dump inline — Research output floods conversation and loses reference for future sessions
  2. Stop after research — never auto-transition — User decides next step
  3. Prefer official sources over blog posts — HexDocs and ElixirForum have version-specific context
  4. One document per research question — No fragmented files
  5. NEVER pass raw user input as WebSearch query — Decompose first

Library Evaluation Mode

If the text after the skill name contains --library or the topic is clearly about evaluating a Hex dependency (e.g., "should we use permit", "evaluate sagents", "compare oban vs exq"):

  1. Read references/library-evaluation.md for the template
  2. Follow the structured evaluation workflow
  3. Output ONE document to .claude/research/{lib}-evaluation.md
  4. Skip the general research workflow below

Portable Research Workflow

0. Pre-flight

Check .claude/research/{topic-slug}.md. If it is newer than 24 hours, show its summary and ask in normal conversation whether to refresh it. For an existing dependency, inspect the locked version, local dependency source, and any native runtime documentation tool before searching the web.

1. Decompose the question

Turn the user request into one focused query when it is short, or two to four queries of at most ten words for a multi-part request. Never send a long raw prompt to a search provider.

Show full SKILL.md (166 more words)Show less
2. Gather sources

Use the runtime's native web or HTTP capabilities when available. Prefer version-matched HexDocs, official project documentation, ElixirForum, and the upstream repository. Deduplicate URLs and discard irrelevant results. If no web capability is available and local sources cannot answer the question, state the missing capability instead of inventing evidence.

3. Extract and synthesize

Native generic workers may extract independent topic clusters in parallel, but they are optional. The same-session sequential path must remain complete. Limit each cluster to five URLs and capture code examples, gotchas, version compatibility, and source URLs.

4. Write one durable result

Write .claude/research/{topic-slug}.md (about 5 KB for topic research or 3 KB for a library evaluation) with:

  • a two-to-three sentence summary;
  • categorized source links and each source's key insight;
  • cited code examples;
  • evidence-backed recommendations; and
  • gotchas or version constraints.
5. Stop after research

Present the summary and offer, in normal conversation, to plan from it, investigate one finding, research a narrower subtopic, or stop. Never invoke a follow-up workflow automatically.

© 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

SKILL.md and 1 other file (references) in targets/codex/skills/phx-research of oliver-kriska/claude-elixir-phoenix.

  • SKILL.md
  • references/library-evaluation.md

Open the folder on GitHubat commit 9767a82

Compare with similar skills

Phx Research 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.

Phx Research compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Phx Research this skilloliver-kriska/claude-elixir-phoenix565—~823Automated safety check: PassMIT
Elixir Architectmaxim-ist/elixir-architect145—~7.6kAutomated safety check: PassMIT
Phoenix Frameworkpodlove/radiator136—~562Automated safety check: PassMIT
Elixir Expertpass-agent/loomkin1811 repos~796Automated safety check: PassMIT
Usage Rulesbradleygolden/claude-marketplace-elixir176—~4.9kAutomated safety check: NotesMIT
Elixir Prodavila7/claude-code-templates33k8 repos~486Automated safety check: PassMIT

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Works with

Categories

Questions about Phx Research

What does Phx Research do?

Research Elixir/Phoenix/Ecto topics or evaluate Hex libraries; Use when learning about libraries, patterns…. Phx Research is an agent skill from oliver-kriska/claude-elixir-phoenix.

When should I use Phx Research?

Phx Research fits situations like: learning about libraries; tasks that involve LLM observability.

How do I install Phx Research in Claude Code?

Run `npx skills add oliver-kriska/claude-elixir-phoenix --skill phx-research -a claude-code`. Or copy the skill folder (targets/codex/skills/phx-research in oliver-kriska/claude-elixir-phoenix) into .claude/skills/phx-research in your project. Claude Code loads it when a task matches its description.

How do I install Phx Research in Codex?

Run `npx skills add oliver-kriska/claude-elixir-phoenix --skill phx-research -a codex`. Or copy the skill folder (targets/codex/skills/phx-research in oliver-kriska/claude-elixir-phoenix) into .agents/skills/phx-research in your project. Codex loads it when a task matches its description.

Can I use Phx Research 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 phx-research -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/phx-research, .gemini/skills/phx-research, .github/skills/phx-research and .opencode/skills/phx-research in your project.

What does Phx Research need to run?

SKILL.md names no scripts, command-line tools or credentials: Phx Research is instructions for the agent only.

Does Phx Research 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 Phx Research 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 Phx Research use?

Phx Research 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 Phx Research use?

About 823 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. Its references folder adds about 487 tokens, read only when the agent opens those files.

What are the alternatives to Phx Research?

Skills that share tags, products or a category with Phx Research: Elixir Architect (maxim-ist/elixir-architect, 145 stars), Phoenix Framework (podlove/radiator, 136 stars), Elixir Expert (pass-agent/loomkin, 181 stars) and Usage Rules (bradleygolden/claude-marketplace-elixir, 176 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Phx Research?

oliver-kriska (a GitHub user) maintains it in oliver-kriska/claude-elixir-phoenix, which has 565 GitHub stars. The repository holds 109 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.