phx-mix-compression SKILL.md skillA
phx-mix-compression 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/phx-mix-compression@git:20260721.df395b3Pins git:20260721.df395b3 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
targets/amp/skills/phx-mix-compression/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260721.df395b3, committed Jul 21, 2026
- Size
- 4,016 bytes
- Repository stars
- 573
- License
- MIT
Reduce mix output noise (5-15% token savings) by installing rtk filters.
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
# Mix Output Compression Mix commands (`mix test`, `mix credo`, `mix dialyzer`, `mix compile`) emit verbose, repetitive output that consumes context fast. This skill installs [rtk](https://github.com/rtk-ai/rtk) — a CLI proxy that filters tool output **before it lands in the transcript**. The filters short-circuit happy paths to a single line (`mix test: all pass`) while preserving full failure blocks, compile errors, and stack traces. Net win: 5-15% per-session token reduction on mix-heavy workflows. ## When to use - **Long sessions** — `phx-work` or `phx-full` hitting context limits from mix output - **Debugging loops** — `phx-investigate` retrying `mix compile`/`mix test` repeatedly - **Dialyzer-heavy projects** — `mix dialyzer` output dominates the transcript ## Iron Laws 1. **NEVER strip critical signals** — compile errors (`** (CompileError)`, `== Compilation error in`), test failures (`FAILURES`, `0 failures` — preserved even on short-circuit), dialyzer warnings, and stack traces with `file:line` MUST pass through unchanged 2. **Verify after install** — run `rtk verify` (or `rtk verify --filter mix-test`) to …
Read the whole file at its exact version.
How to install
mdr add oliver-kriska/claude-elixir-phoenix/phx-mix-compression@sha256:88d885c1fbbbd709The line at the top of this page pins the label git:20260721.df395b3, 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_c3fnrh2w3lgszxhg)
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Versions
The registry has recorded 1 version of this file, committed on Jul 21, 2026.
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 (4016 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 · 573 stars · license MIT · pushed 2026-11-06 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_c3fnrh2w3lgszxhg GET https://markdownregistry.com/api/v1/resolve?ref=oliver-kriska/claude-elixir-phoenix/phx-mix-compression GET https://markdownregistry.com/api/v1/blob/88d885c1fbbbd7090276968d2fcb34e07e971e5e2996ebdade4258ba5d588b50
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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