Membrane Framework
membraneframework/membrane_core
Work with the Membrane multimedia streaming framework in Elixir.
Capture Elixir/Ecto/LiveView lessons and Hex API rules. An agent skill from oliver-kriska/claude-elixir-phoenix.
MITAuto-check passed
Install Phx Learn From Fix
$ npx skills add oliver-kriska/claude-elixir-phoenix --skill phx-learn-from-fix -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install oliver-kriska/claude-elixir-phoenix phx-learn-from-fix --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-learn-from-fix .claude/skills/phx-learn-from-fix && 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-learn-from-fix" agent skill from https://github.com/oliver-kriska/claude-elixir-phoenix/tree/main/targets/codex/skills/phx-learn-from-fix into .claude/skills/phx-learn-from-fix/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "phx-learn-from-fix", 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-learn-from-fixType 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-learn-from-fix -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install oliver-kriska/claude-elixir-phoenix phx-learn-from-fix --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-learn-from-fix .agents/skills/phx-learn-from-fix && 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-learn-from-fix" agent skill from https://github.com/oliver-kriska/claude-elixir-phoenix/tree/main/targets/codex/skills/phx-learn-from-fix into .agents/skills/phx-learn-from-fix/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "phx-learn-from-fix", 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-learn-from-fix -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install oliver-kriska/claude-elixir-phoenix phx-learn-from-fix --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-learn-from-fix .cursor/skills/phx-learn-from-fix && 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-learn-from-fix" agent skill from https://github.com/oliver-kriska/claude-elixir-phoenix/tree/main/targets/codex/skills/phx-learn-from-fix into .cursor/skills/phx-learn-from-fix/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "phx-learn-from-fix", 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-learn-from-fix--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-learn-from-fix -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install oliver-kriska/claude-elixir-phoenix phx-learn-from-fix --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-learn-from-fix .gemini/skills/phx-learn-from-fix && 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-learn-from-fix" agent skill from https://github.com/oliver-kriska/claude-elixir-phoenix/tree/main/targets/codex/skills/phx-learn-from-fix into .gemini/skills/phx-learn-from-fix/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "phx-learn-from-fix", 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-learn-from-fixInstalls 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-learn-from-fix -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-learn-from-fix .github/skills/phx-learn-from-fix && 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-learn-from-fix" agent skill from https://github.com/oliver-kriska/claude-elixir-phoenix/tree/main/targets/codex/skills/phx-learn-from-fix into .github/skills/phx-learn-from-fix/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "phx-learn-from-fix", 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-learn-from-fix -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-learn-from-fix --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-learn-from-fix .opencode/skills/phx-learn-from-fix && 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-learn-from-fix" agent skill from https://github.com/oliver-kriska/claude-elixir-phoenix/tree/main/targets/codex/skills/phx-learn-from-fix into .opencode/skills/phx-learn-from-fix/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "phx-learn-from-fix", 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-learn-from-fix- GitHub stars
- 565
- Token cost
- ~1.7k tokens
- SKILL.md length
- 747 words
- Files
- 2 (incl. references)
- Skills in repo
- 109
- Repo updated
- First seen
- Licence
- MIT
At a glance
Capture Elixir/Ecto/LiveView lessons and Hex API rules. An agent skill from oliver-kriska/claude-elixir-phoenix.
- Works in 3 steps: Verify the Lesson → Select the Route → Check Existing Knowledge
- SKILL.md covers Usage, Workflow, Library Route and General Correction Route, plus 3 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Phx Learn From Fix is an agent skill from oliver-kriska/claude-elixir-phoenix. Capture Elixir/Ecto/LiveView lessons and Hex API rules. Use after corrections or when asked to document learning…
Its SKILL.md is about 1.7k tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files, including reference files (for example `references/common-mistakes.md`).
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.
Example prompts
- “/phx-learn-from-fix”
Workflow steps
3 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 (its code samples are markdown).
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 Learn From Fix loads about 1.7k tokens when it runs, and up to ~3.2k if it reads all its reference files. Until then it costs about 33 tokens; SKILL.md has 747 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). 747 words, ~1,744 tokens.
Download SKILL.mdSave it as
.claude/skills/phx-learn-from-fix/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.- name
- phx-learn-from-fix
- description
- Capture Elixir/Ecto/LiveView lessons and Hex API rules. Use after corrections or when asked to document learning…
Learn From Fix
After fixing a bug or receiving a correction, capture the lesson to prevent future mistakes.
Usage
$elixir-phoenix:phx-learn-from-fix Fixed N+1 query in user listing - was missing preload
$elixir-phoenix:phx-learn-from-fix String vs atom key mismatch in params handling
$elixir-phoenix:phx-learn-from-fix LiveView assign_async needs render_async in tests
$elixir-phoenix:phx-learn-from-fix --library ical --scope personal ICal.to_ics output needs CRLF line endings
$elixir-phoenix:phx-learn-from-fix --library ical --scope project Use method: "PUBLISH" for calendar feedsWorkflow
Step 1: Verify the Lesson
Persist only one of:
- A completed fix verified by tests, reproduction, or user confirmation
- An explicit rule the user taught or asked to save
Stop without writing if neither condition is met.
Do not save a hypothesis, unverified workaround, investigation narrative, or
unsolved error. Use $elixir-phoenix:phx-compound for a detailed completed investigation.
Capture the root cause as a concise actionable rule, not the symptom.
Step 2: Select the Route
When both --library <package> and --scope personal|project are present,
use the Library Route. Require both flags; do not guess scope.
For the skill directory only, trim surrounding whitespace and lowercase the
package name. Preserve underscores when forming directory names
(phoenix_live_view becomes hex-phoenix_live_view).
Validate the normalized name against ^[a-z][a-z0-9_]+$. If it does not match,
ask for a valid Hex package identifier instead of replacing characters or
inventing a name. Use the trimmed original identifier, not the normalized
directory name, to look up mix.lock.
Without --library, use the General Correction Route.
Step 3: Check Existing Knowledge
Check if already documented:
- Grep project CLAUDE.md and
~/.claude/CLAUDE.mdfor the pattern keyword - Check auto-memory files for similar lessons
- For library lessons, inspect both
~/.claude/skills/hex-<package>/SKILL.mdand.claude/skills/hex-<package>/SKILL.md - Read
references/common-mistakes.md(read-only plugin reference)
Do not duplicate the same lesson across CLAUDE.md, memory, and a package skill. If the same rule exists, merge wording or report it as already captured.
Library Route
Plugin files are read-only: files under ~/.claude/plugins/ are cached
and get overwritten on updates. Package skills are user-owned files, never
plugin cache files.
Resolve Scope and Precedence
--scope | Canonical destination |
|---|---|
personal | ~/.claude/skills/hex-<package>/SKILL.md |
project | .claude/skills/hex-<package>/SKILL.md |
Personal skills override same-named project skills. If a personal
hex-<package> skill exists, never unknowingly create or update a shadowed
project skill: explain the conflict and ask whether to update personal scope or
keep distinct project-only knowledge. If project scope already exists before a
personal write, warn that the new skill will shadow it and offer to merge or
move it. Maintain one canonical skill per package unless the user explicitly
needs distinct scope-specific rules; never create one skill per lesson.
Read the Locked Version
Inspect mix.lock for the package. Record the exact locked version when found.
If it is absent, say the lesson is not tied to a locally locked version and do
not invent one. Qualify version-sensitive rules. When two verified rules
conflict across versions, preserve both with explicit version ranges instead of
replacing either.
Show full SKILL.md (330 more words)Show less
Create or Safely Update the Skill
For a new package skill, create:
---
name: hex-<package>
description: <Package/module/API/task trigger terms for this knowledge>
user-invocable: false
---
# <Package> Knowledge
## Verified Rules
- **<Rule>** (verified with <package> <version>): <actionable guidance>Make the description precise: include the Hex package, Elixir module names,
important APIs/file formats, and tasks that should trigger this knowledge.
Activation is model-selected from this description; package presence in
mix.lock does not guarantee activation.
Before updating an existing skill, read all of it. Preserve unrelated and hand-authored sections. Merge semantically identical rules. If safe merging is unclear, show the conflict and ask instead of overwriting content.
Do not add paths: to a personal package skill by default: it is a file-path
activation gate, not a dependency predicate. Add paths: only to project scope
when explicitly appropriate and meaningful package-specific paths exist.
General Correction Route
Choose the narrowest non-library destination:
| Scope | Write to | Example |
|---|---|---|
| This project | Project CLAUDE.md | "Never use raw SQL in this app" |
| This project across sessions | Project-keyed auto-memory | "jsonb uses string keys" |
| All your projects | ~/.claude/CLAUDE.md personal instructions | "Prefer explicit error tuples" |
| Detailed completed fix | .claude/solutions/ via $elixir-phoenix:phx-compound | Debugging narrative |
For project or personal instructions, preserve existing content and append
**RULE NAME** — Do NOT [bad]. Instead [good] under the relevant category. Use
personal instructions only for rules that should load in every project. For
auto-memory, append to the project-keyed
~/.claude/projects/{project-hash}/memory/MEMORY.md:
### Lesson: [Title]
- **Pattern**: Do NOT [bad] — instead [good]
- **Why**: [root cause explanation]If the lesson is universal to the plugin rather than one project or package, suggest a plugin contribution; never write it into cached plugin files.
Output
After capturing, confirm:
Lesson captured in [location]
Pattern: Do NOT [bad pattern] — instead [good pattern]
Category: [Ecto/LiveView/OTP/Testing/etc]
Version: [locked package version, not found, or not applicable]For package skills, also state that description-based activation is
model-selected, not guaranteed by mix.lock.
Iron Laws
- NEVER write generated knowledge to plugin cache — use only the user-owned destinations above
- DO NOT duplicate existing lessons — always check CLAUDE.md and memory before writing
- NEVER overwrite hand-authored content — read both package skill scopes and merge safely
- ONLY persist verified knowledge — completed fixes or explicit user-taught rules, never hypotheses
- DISCLOSE scope precedence — a global package skill shadows its project counterpart
References (READ-ONLY — do NOT edit)
references/common-mistakes.md— Common Elixir mistakes reference. Consult when checking for duplicates.
© 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-learn-from-fix of oliver-kriska/claude-elixir-phoenix.
- SKILL.md
- references/common-mistakes.md
Open the folder on GitHubat commit 9767a82
Compare with similar skills
Phx Learn From Fix 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 Learn From Fix this skilloliver-kriska/claude-elixir-phoenix | 565 | — | ~1.7k | Automated safety check: Pass | MIT | |
| Membrane Frameworkmembraneframework/membrane_core | 1.5k | — | ~4.2k | Automated safety check: Pass | Apache-2.0 | |
| Web Ng Docker Loopcarverauto/serviceradar | 921 | — | ~737 | Automated safety check: Pass | Apache-2.0 | |
| Components Architectureoperately/operately | 578 | — | ~2.5k | Automated safety check: Pass | Custom licence | |
| Ash Frameworkpodlove/radiator | 136 | — | ~2.1k | Automated safety check: Pass | MIT | |
| Elixir Architectmaxim-ist/elixir-architect | 145 | — | ~7.6k | Automated safety check: Pass | MIT |
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Ash Framework
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Elixir Architect
maxim-ist/elixir-architect
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Related
Works with
Questions about Phx Learn From Fix
What does Phx Learn From Fix do?
Capture Elixir/Ecto/LiveView lessons and Hex API rules. An agent skill from oliver-kriska/claude-elixir-phoenix. Phx Learn From Fix is an agent skill from oliver-kriska/claude-elixir-phoenix. Capture Elixir/Ecto/LiveView lessons and Hex API rules.
How do I install Phx Learn From Fix in Claude Code?
Run `npx skills add oliver-kriska/claude-elixir-phoenix --skill phx-learn-from-fix -a claude-code`. Or copy the skill folder (targets/codex/skills/phx-learn-from-fix in oliver-kriska/claude-elixir-phoenix) into .claude/skills/phx-learn-from-fix in your project. Claude Code loads it when a task matches its description.
How do I install Phx Learn From Fix in Codex?
Run `npx skills add oliver-kriska/claude-elixir-phoenix --skill phx-learn-from-fix -a codex`. Or copy the skill folder (targets/codex/skills/phx-learn-from-fix in oliver-kriska/claude-elixir-phoenix) into .agents/skills/phx-learn-from-fix in your project. Codex loads it when a task matches its description.
Can I use Phx Learn From Fix 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-learn-from-fix -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-learn-from-fix, .gemini/skills/phx-learn-from-fix, .github/skills/phx-learn-from-fix and .opencode/skills/phx-learn-from-fix in your project.
What does Phx Learn From Fix need to run?
SKILL.md names no scripts, command-line tools or credentials: Phx Learn From Fix is instructions for the agent only.
Does Phx Learn From Fix 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 Learn From Fix 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 Learn From Fix use?
Phx Learn From Fix 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 Learn From Fix use?
About 1.7k tokens (SKILL.md is roughly 7k 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 1.5k tokens, read only when the agent opens those files.
What are the alternatives to Phx Learn From Fix?
Skills that share tags, products or a category with Phx Learn From Fix: Membrane Framework (membraneframework/membrane_core, 1.5k stars), Web Ng Docker Loop (carverauto/serviceradar, 921 stars), Components Architecture (operately/operately, 578 stars) and Ash Framework (podlove/radiator, 136 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Phx Learn From Fix?
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.