Systematic Code Refactoring
luongnv89/claude-howto
Guides refactoring in phases based on Martin Fowler's method: research, test coverage check, planning and small tested steps, with your approval at each phase.
Analyze Elixir/Phoenix technical debt — duplicates, refactoring; Use when asked about code quality, cleanup, or what…
Install Phx Techdebt
$ npx skills add oliver-kriska/claude-elixir-phoenix --skill phx-techdebt -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install oliver-kriska/claude-elixir-phoenix phx-techdebt --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/codex/skills/phx-techdebt .claude/skills/phx-techdebt && 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 "phx-techdebt" agent skill from https://github.com/oliver-kriska/claude-elixir-phoenix/tree/main/targets/codex/skills/phx-techdebt into .claude/skills/phx-techdebt/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "phx-techdebt", 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/codex/skills/phx-techdebtType 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 phx-techdebt -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install oliver-kriska/claude-elixir-phoenix phx-techdebt --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/codex/skills/phx-techdebt .agents/skills/phx-techdebt && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "phx-techdebt" agent skill from https://github.com/oliver-kriska/claude-elixir-phoenix/tree/main/targets/codex/skills/phx-techdebt into .agents/skills/phx-techdebt/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "phx-techdebt", 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 phx-techdebt -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install oliver-kriska/claude-elixir-phoenix phx-techdebt --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/codex/skills/phx-techdebt .cursor/skills/phx-techdebt && 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 "phx-techdebt" agent skill from https://github.com/oliver-kriska/claude-elixir-phoenix/tree/main/targets/codex/skills/phx-techdebt into .cursor/skills/phx-techdebt/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "phx-techdebt", 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/codex/skills/phx-techdebt--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 phx-techdebt -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install oliver-kriska/claude-elixir-phoenix phx-techdebt --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/codex/skills/phx-techdebt .gemini/skills/phx-techdebt && 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 "phx-techdebt" agent skill from https://github.com/oliver-kriska/claude-elixir-phoenix/tree/main/targets/codex/skills/phx-techdebt into .gemini/skills/phx-techdebt/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "phx-techdebt", 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 phx-techdebtInstalls 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 phx-techdebt -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/codex/skills/phx-techdebt .github/skills/phx-techdebt && 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 "phx-techdebt" agent skill from https://github.com/oliver-kriska/claude-elixir-phoenix/tree/main/targets/codex/skills/phx-techdebt into .github/skills/phx-techdebt/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "phx-techdebt", 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 phx-techdebt -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 phx-techdebt --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/codex/skills/phx-techdebt .opencode/skills/phx-techdebt && 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 "phx-techdebt" agent skill from https://github.com/oliver-kriska/claude-elixir-phoenix/tree/main/targets/codex/skills/phx-techdebt into .opencode/skills/phx-techdebt/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "phx-techdebt", 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
phx-techdebt- GitHub stars
- 565
- Token cost
- ~583 tokens
- SKILL.md length
- 257 words
- Files
- 1
- Skills in repo
- 111
- Repo updated
- First seen
- Licence
- MIT
At a glance
Analyze Elixir/Phoenix technical debt — duplicates, refactoring; Use when asked about code quality, cleanup, or what…
- Works in 4 steps: Run Credo for Automated Detection → Find Duplicate Ecto Query Patterns → Find Duplicate Validation Logic → …
- Asked about code quality
- SKILL.md covers Iron Laws - Never Violate These, Analysis Checklist, Common Duplication Patterns and Reporting Format, plus 1 more section
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Phx Techdebt is an agent skill from oliver-kriska/claude-elixir-phoenix. Analyze Elixir/Phoenix technical debt — duplicates, refactoring; Use when asked about code quality, cleanup, or what…
Its SKILL.md is about 580 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 LLM observability, Technical debt and Refactoring. 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
- Asked about code quality
- Tasks that involve LLM observability
- Tasks that involve Technical debt
Example prompts
- “/phx-techdebt”
Workflow steps
4 steps, taken from the step headings in SKILL.md.
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 Techdebt loads about 583 tokens when it runs. Until then it costs about 33 tokens; SKILL.md has 257 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). 257 words, ~583 tokens.
Download SKILL.mdSave it as
.claude/skills/phx-techdebt/SKILL.md (or your agent's skills folder).- name
- phx-techdebt
- description
- Analyze Elixir/Phoenix technical debt — duplicates, refactoring; Use when asked about code quality, cleanup, or what…
Technical Debt Detection
Find and eliminate duplicate code patterns, anti-patterns, and refactoring opportunities in Elixir/Phoenix projects.
Iron Laws - Never Violate These
- Search before refactoring - Understand full scope of duplication before extracting
- Three strikes rule - Extract shared code only after 3+ duplications
- Prefer composition - Use behaviours and protocols over inheritance-style abstractions
- Test coverage first - Ensure tests exist before refactoring duplicated code
Analysis Checklist
1. Run Credo for Automated Detection
Run mix credo --strict.
Focus on:
- Design issues (duplication, complexity)
- Consistency issues (naming, patterns)
- Refactoring opportunities
2. Find Duplicate Ecto Query Patterns
Use Grep to search for repeated Repo calls (Repo.get!, Repo.get, Repo.one) in lib/**/*.ex.
Use Grep to find duplicate query patterns (from.*in.*where) in lib/**/*.ex.
3. Find Duplicate Validation Logic
Use Grep with output_mode: "count" to count def changeset occurrences in lib/**/*.ex.
Use Grep to find repeated validations (validate_required, validate_format) in lib/**/*.ex.
4. Find Copy-Pasted Controller Actions
Use Grep to find similar action patterns (def create, def update, def delete) in lib/*_web/**/*.ex.
Common Duplication Patterns
| Pattern | Symptom | Solution |
|---|---|---|
| Repeated queries | Same Repo.get in multiple contexts | Create shared query module |
| Duplicate validations | Same validate_* calls | Extract to shared changeset |
| Similar controllers | Copy-pasted CRUD actions | Use Phoenix generators consistently |
| Repeated transforms | Same Enum.map patterns | Extract to domain module |
Reporting Format
For each duplication found, report:
- Location: File paths and line numbers
- Pattern: What code is duplicated
- Extraction: Suggested shared function/module
- Effort: Low/Medium/High to fix
Usage
Run $elixir-phoenix:phx-techdebt to analyze the codebase and generate a prioritized report of technical debt with specific remediation steps.
© 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/codex/skills/phx-techdebt of oliver-kriska/claude-elixir-phoenix.
Open the folder on GitHubat commit 9767a82
Compare with similar skills
Phx Techdebt 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 |
|---|---|---|---|---|---|---|
| Phx Techdebt this skilloliver-kriska/claude-elixir-phoenix | 565 | — | ~583 | Automated safety check: Pass | MIT | |
| Systematic Code Refactoringluongnv89/claude-howto | 42k | — | ~3k | Automated safety check: Pass | MIT | |
| Code Refactoring Workflowluongnv89/claude-howto | 42k | — | ~3.1k | Automated safety check: Pass | MIT | |
| FIXME Resolvertailcallhq/forgecode | 7.6k | — | ~1.1k | Automated safety check: Pass | Apache-2.0 | |
| DesloppifyGit-on-my-level/codex-autorunner | 875 | — | ~3.4k | Automated safety check: Pass | MIT | |
| Tech Debt Analyzerailabs-393/ai-labs-claude-skills | 454 | 1 repos | ~3.9k | Automated safety check: Pass | MIT |
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Related
Works with
Categories
Questions about Phx Techdebt
What does Phx Techdebt do?
Analyze Elixir/Phoenix technical debt — duplicates, refactoring; Use when asked about code quality, cleanup, or what…. Phx Techdebt is an agent skill from oliver-kriska/claude-elixir-phoenix.
When should I use Phx Techdebt?
Phx Techdebt fits situations like: asked about code quality; tasks that involve LLM observability; tasks that involve Technical debt.
How do I install Phx Techdebt in Claude Code?
Run `npx skills add oliver-kriska/claude-elixir-phoenix --skill phx-techdebt -a claude-code`. Or copy the skill folder (targets/codex/skills/phx-techdebt in oliver-kriska/claude-elixir-phoenix) into .claude/skills/phx-techdebt in your project. Claude Code loads it when a task matches its description.
How do I install Phx Techdebt in Codex?
Run `npx skills add oliver-kriska/claude-elixir-phoenix --skill phx-techdebt -a codex`. Or copy the skill folder (targets/codex/skills/phx-techdebt in oliver-kriska/claude-elixir-phoenix) into .agents/skills/phx-techdebt in your project. Codex loads it when a task matches its description.
Can I use Phx Techdebt 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-techdebt -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-techdebt, .gemini/skills/phx-techdebt, .github/skills/phx-techdebt and .opencode/skills/phx-techdebt in your project.
What does Phx Techdebt need to run?
SKILL.md names no scripts, command-line tools or credentials: Phx Techdebt is instructions for the agent only.
Does Phx Techdebt 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 Techdebt 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 Techdebt use?
Phx Techdebt 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 Techdebt use?
About 583 tokens (SKILL.md is roughly 2.3k 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 Phx Techdebt?
Skills that share tags, products or a category with Phx Techdebt: Systematic Code Refactoring (luongnv89/claude-howto, 42k stars), Code Refactoring Workflow (luongnv89/claude-howto, 42k stars), FIXME Resolver (tailcallhq/forgecode, 7.6k stars) and Desloppify (Git-on-my-level/codex-autorunner, 875 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Phx Techdebt?
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.