path-to-regexp-v8-migration SKILL.md skillA
path-to-regexp-v8-migration from reactive/data-client is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add reactive/data-client/path-to-regexp-v8-migration@git:20260819.be7ae1aPins git:20260819.be7ae1a in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- reactive/data-client
- Path
.agents/skills/path-to-regexp-v8-migration/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260819.be7ae1a, committed Aug 19, 2026
- Size
- 2,980 bytes
- Repository stars
- 2,040
- License
- Apache-2.0
Migrate @data-client/rest path strings from path-to-regexp v6 to v8 syntax. Use when upgrading path-to-regexp, updating RestEndpoint.path or resource path strings, or when seeing errors about unexpected ?, +, (, or ) in paths.
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
# path-to-regexp v6 → v8 Migration
Applies to `path` in `RestEndpoint`, `resource()`, and any string passed to path-to-regexp.
Reference: [path-to-regexp README errors section](https://github.com/pillarjs/path-to-regexp#errors)
## Migration Rules
### Optional parameters
`?` suffix removed. Wrap the optional segment (including its prefix) in `{}`.
```
/:id? → {/:id}
/users/:id? → /users{/:id}
/files/:name? → /files{/:name}
```
### Repeating parameters
`+` (one-or-more) and `*` (zero-or-more) suffixes removed. Use `*name` wildcard syntax.
```
/:path+ → /*path
/:path* → {/*path}
```
### Quoted parameter names
Parameter names must be valid JS identifiers. Names with special characters need double quotes.
```
/:with-dash → /:"with-dash"
/:my.param → /:"my.param"
```
### Escaping special characters
Characters including `{}()[]+?!:*\\` must be escaped with `\\` when used as **literals** (see
[path-to-regexp errors](https://github.com/pillarjs/path-to-regexp#errors)). A literal `?` in the path
(e.g. before fixed query text like `?per_page=50`) must stay as `\\?` in the source string — removing the
…Read the whole file at its exact version.
How to install
mdr add reactive/data-client/path-to-regexp-v8-migration@sha256:2dcf524cb6cb3976The line at the top of this page pins the label git:20260819.be7ae1a, 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_en2qgge2pxt5yvea)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Aug 19, 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 (2980 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
reactive/data-client · 2,040 stars · license Apache-2.0 · pushed 2026-11-01 · branch master
API
GET https://markdownregistry.com/api/v1/artifacts/art_en2qgge2pxt5yvea GET https://markdownregistry.com/api/v1/resolve?ref=reactive/data-client/path-to-regexp-v8-migration GET https://markdownregistry.com/api/v1/blob/2dcf524cb6cb3976a23a20ab864f8ff602458aaf561fb15797a1ade4817155f3
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.