perf SKILL.md skillA
perf from oliver-kriska/claude-elixir-phoenix is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add oliver-kriska/claude-elixir-phoenix/perf@git:20260929.c08ad14Pins git:20260929.c08ad14 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- oliver-kriska/claude-elixir-phoenix
- Path
plugins/elixir-phoenix/skills/perf/SKILL.md- Versions recorded
- 7
- Latest version
- git:20260929.c08ad14, committed Sep 29, 2026
- First version recorded
- Mar 21, 2026
- Size
- 3,943 bytes
- Repository stars
- 572
- License
- MIT
Use when anything in a Phoenix app is slow, times out, or uses too much memory, even if the cause looks obvious. Load it before analyzing or fixing: it runs measured Ecto, LiveView and OTP checks and ranks fixes.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Performance Analysis Analyze code for performance issues across Ecto, LiveView, and OTP layers. Prioritize findings by impact and effort. ## Usage ``` /phx:perf # Analyze full project /phx:perf lib/my_app/accounts.ex # Analyze specific module /phx:perf --focus ecto # Ecto queries only /phx:perf --focus liveview # LiveView memory only /phx:perf --focus otp # OTP bottlenecks only ``` ## Arguments `$ARGUMENTS` = Optional module/context path and `--focus` flag. ## Iron Laws 1. **MEASURE BEFORE OPTIMIZING** — Never optimize without evidence of a problem 2. **DATABASE FIRST** — 90% of Elixir performance issues are query-related 3. **ONE CHANGE AT A TIME** — Isolate optimizations to measure impact 4. **NEVER benchmark in dev mode** — Always use `MIX_ENV=prod` for performance measurements; dev mode includes code reloading, debug logging, and unoptimized compilation that invalidate results ## Workflow ### Step 1: Identify Scope Check specific file if provided. Otherwise scan full project: ```bash # Find hot paths: contexts, LiveViews, workers find lib/ -name "*.ex" | head -50 ``` ### Step 2: Run Analysis Tracks …
Read the whole file at its exact version.
How to install
mdr add oliver-kriska/claude-elixir-phoenix/perf@sha256:b7d1d0dd7224c798The line at the top of this page pins the label git:20260929.c08ad14, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_g4s257mos3csu27z)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 7 versions of this file, between Mar 21, 2026 and Sep 29, 2026, about one every 32 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260929.c08ad14 latest | 2026-09-29 | c08ad14 | 3,943 B | A | view · diff |
| git:20260921.69af5df | 2026-09-21 | 69af5df | 3,933 B | A | view · diff |
| git:20260724.918f809 | 2026-07-24 | 918f809 | 3,890 B | A | view · diff |
| git:20260520.f0a803b | 2026-05-20 | f0a803b | 3,927 B | A | view · diff |
| git:20260401.f2ab67a | 2026-04-01 | f2ab67a | 3,958 B | A | view · diff |
| git:20260325.d20c8dd | 2026-03-25 | d20c8dd | 4,131 B | A | view · diff |
| git:20260321.4e9d9e9 | 2026-03-21 | 4e9d9e9 | 3,901 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (3943 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
oliver-kriska/claude-elixir-phoenix · 572 stars · license MIT · pushed 2026-11-02 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_g4s257mos3csu27z GET https://markdownregistry.com/api/v1/resolve?ref=oliver-kriska/claude-elixir-phoenix/perf GET https://markdownregistry.com/api/v1/blob/b7d1d0dd7224c79896b4764641665eaec884be5cb16612b8e49827d7998ea6bf
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.
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