ccr SKILL.md skillA
ccr from broomva/skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add broomva/skills/ccr@git:20260726.e12b926Pins git:20260726.e12b926 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- broomva/skills
- Path
skills/knowledge/ccr/SKILL.md- Versions recorded
- 2
- Latest version
- git:20260726.e12b926, committed Jul 26, 2026
- First version recorded
- Jul 26, 2026
- Size
- 13,832 bytes
- Repository stars
- 5
- License
- MIT
ccr — reversible payload compression: shrink any blob (tool output, log, RAG chunk, file) BEFORE it enters an LLM's context, while caching the full original locally so it can be expanded byte-for-byte on demand. The payload-axis counterpart to a knowledge-graph loader (the retrieval axis): the model sees a compact lossy view + a handle (ccr://<sha256>), and calls retrieve(handle) only when it needs the bytes back. Content-routed deterministic compactors…
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
# ccr — reversible payload compression (the payload axis) `ccr compress <file|->` · `ccr retrieve <handle>` · `ccr stats` Shrink any blob — a tool output, a log, a RAG chunk, a file — **before** it enters context, while keeping the original recoverable. The **payload-axis** counterpart to a knowledge-graph loader (the **retrieval axis**): kg shrinks *which* entities reach the model; ccr shrinks *each blob* that does. Lifted from the **CCR / reversible-compression** component of [Headroom](https://github.com/chopratejas/headroom) (28.5k★, Apache-2.0). We lifted the *pattern*, not the dependency. Anchor: **BRO-1521**. ## The one idea > Compression is reversible because the **full original is cached locally**, > keyed by content hash. The model sees a compact lossy *view* + a handle > (`ccr://<sha256>`); it calls `retrieve(handle)` only when it needs the bytes. So the view can be aggressively lossy without losing information — the loss is recoverable on demand. Same shape a KG loader uses on the other axis: a lossy catalog projection that expands to the full entity body on load. ## Mechanism Dispatch by detected content type (a file-extension hint beats the content …
Read the whole file at its exact version.
How to install
mdr add broomva/skills/ccr@sha256:6916f1076313f59dThe line at the top of this page pins the label git:20260726.e12b926, 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_65ap3lw73rnnzoqu)
6 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, all committed on Jul 26, 2026.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260726.e12b926 latest | 2026-07-26 | e12b926 | 13,832 B | A | view · diff |
| git:20260726.12dea82 | 2026-07-26 | 12dea82 | 9,975 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 (13832 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
broomva/skills · 5 stars · license MIT · pushed 2026-11-07 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_65ap3lw73rnnzoqu GET https://markdownregistry.com/api/v1/resolve?ref=broomva/skills/ccr GET https://markdownregistry.com/api/v1/blob/6916f1076313f59dfc80ed112f95d68423f662c57bebb77f64a7a404e8c5b491
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.