furl SKILL.md skillA
furl from omar-y-abdi/furl-ctx is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add omar-y-abdi/furl-ctx/furl@v1.4.0Pins v1.4.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- omar-y-abdi/furl-ctx
- Path
plugins/furl/skills/furl/SKILL.md- Versions recorded
- 5
- Latest version
- v1.4.0, committed Aug 8, 2026
- First version recorded
- Jul 25, 2026
- Size
- 23,396 bytes
- Repository stars
- 5
- License
- Apache-2.0
How the Furl context-compression plugin works in Claude Code and Codex — the furl_compress / furl_retrieve / furl_stats / furl_purge / furl_search / furl_list MCP tools, the <<ccr:HASH>> retrieval flow, and Claude Code's optional automatic hooks. Use when the user asks what Furl is doing, how to compress or retrieve content, why Claude Code output looks compressed, or how to tune or disable Furl.
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
# Furl — context compression for Claude Code and Codex Furl reduces the tokens large tool outputs cost by compressing them, while keeping every dropped byte **retrievable on demand**. It ships these capabilities: 1. An **MCP server** (`furl`) exposing six tools in Claude Code and Codex. 2. A retrieval-aware **skill** in both hosts. 3. **Automatic hooks in Claude Code only.** Codex uses explicit `furl_compress` calls; its separate package root intentionally excludes Claude's incompatible hooks. **Retrieval is pull-based, not push-based.** The compressed text you read does not contain the dropped rows. To inspect a specific dropped item, call `furl_retrieve` for it by pattern, field, or line range. Retrieval is byte-exact for raw text. A JSON array narrowed by `select`/`fields` comes back re-serialized — semantically complete but pretty-printed, so **not** byte-identical to the source; when byte fidelity matters (hashing, diffing, signature checks) pass `raw: true` on a row-select and each matched row returns byte-identical to its source bytes, the rows rejoined with fresh array punctuation, so each row is exact while the whole blob is not one contiguous slice. …
Read the whole file at its exact version.
How to install
mdr add omar-y-abdi/furl-ctx/furl@sha256:946818229045e266The line at the top of this page pins the label v1.4.0, 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_kwvjzjkf2d5ewljb)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Jul 25, 2026 and Aug 8, 2026, about one every 3 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v1.4.0 latest | 2026-08-08 | 799299e | 23,396 B | A | view · diff |
| v1.3.2 | 2026-08-07 | fe5c1b8 | 23,396 B | A | view · diff |
| v1.3.2 | 2026-08-07 | 6a54034 | 23,389 B | A | view · diff |
| v1.3.2 | 2026-07-25 | fd8c846 | 22,934 B | A | view · diff |
| v1.3.2 | 2026-07-25 | e5a0ab1 | 22,266 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 (23396 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
omar-y-abdi/furl-ctx · 5 stars · license Apache-2.0 · pushed 2026-10-28 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_kwvjzjkf2d5ewljb GET https://markdownregistry.com/api/v1/resolve?ref=omar-y-abdi/furl-ctx/furl GET https://markdownregistry.com/api/v1/blob/946818229045e2667a9a50cc6b440215f0846669dc36b3b5d67829ad8105bd2f
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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