prune SKILL.md skillA
prune from matthewp/tideway is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add matthewp/tideway/prune@git:20260710.041301bPins git:20260710.041301b in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- matthewp/tideway
- Path
skills/prune/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260710.041301b, committed Jul 10, 2026
- Size
- 2,081 bytes
- Repository stars
- 2
- License
- BSD-3-Clause
Find and remove unused CSS in a Tideway project — classes defined in stylesheets but never referenced in markup. Use whenever the user wants to prune dead CSS, find unused styles or classes, clean up or slim a stylesheet, find orphaned BEM classes, or "tree-shake" hand-written CSS.
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
# Tideway: prune Prune finds CSS classes a project defines but no longer uses, so hand-written stylesheets don't accumulate dead rules. Tideway's conventions make this reliable: every selector is a single flat class, so each rule maps to exactly one class name, and the distinctive BEM names are unambiguous to search for. ## Workflow 1. **Run the detector** from the project root: ``` python scripts/find_unused.py <project-dir> ``` It scans every `.css` file for defined classes, searches the project's markup and scripts for each, and prints two groups: **Unused** (no reference anywhere) and **Possibly dynamic** (see below). 2. **Report the findings to the user** before changing anything. Group by file so the scope is clear. 3. **Remove what's confirmed unused**, on the user's go-ahead. Because a block's CSS lives together, removing an unused element or modifier is a local deletion; an entire unused block is its whole section or file. Removal is safe to do under version control. ## The one thing to be careful about …
Read the whole file at its exact version.
How to install
mdr add matthewp/tideway/prune@sha256:8f75ab0ace6a4116The line at the top of this page pins the label git:20260710.041301b, 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_gqx5idhnothtiacs)
5 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Jul 10, 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 (2081 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
matthewp/tideway · 2 stars · license BSD-3-Clause · pushed 2026-09-18 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_gqx5idhnothtiacs GET https://markdownregistry.com/api/v1/resolve?ref=matthewp/tideway/prune GET https://markdownregistry.com/api/v1/blob/8f75ab0ace6a4116540e9fa1e09b41318655a52c883d9c3c78bb0a4ae5f70265
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.
More from matthewp/tideway
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