tailr-start SKILL.md skillA
tailr-start from gcrft123/tailr is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add gcrft123/tailr/tailr-start@git:20260907.6b54c97Pins git:20260907.6b54c97 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- gcrft123/tailr
- Path
skills/tailr-start/SKILL.md- Versions recorded
- 2
- Latest version
- git:20260907.6b54c97, committed Sep 7, 2026
- First version recorded
- Sep 6, 2026
- Size
- 2,251 bytes
- Repository stars
- 7
- License
- MIT
Start a Tailr session against the running dev server and begin watching for the reviewer's first batch of visual markup. Invoke with /tailr-start.
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
# Start a Tailr review session
The user invoked this with: $ARGUMENTS
Carry this out now. Do not summarize it back or ask whether to proceed.
## 1. Find the dev server
If `$ARGUMENTS` names a URL, use it. Otherwise work out where this project's dev
server runs — check `package.json` scripts, the framework's default port, or
whatever is already listening — and start it if it is not up. Ask only if you
genuinely cannot determine it.
## 2. Start Tailr against it
Use Tailr's own detach — do **not** background the command with `&`, and do not
touch anything under `.tailr/`:
npx -y @gcrft123/tailr start --target <dev server url>
Or call the `tailr_start` MCP tool with the same target. Either returns once the
session is up and prints the review URL. It proxies the app on its own port
(usually 4100) and injects its overlay. Nothing in the project's source is
modified, and hot reload keeps working.
If it reports a session is already up, use the URL it names rather than
starting a second one.
## 3. Hand over the URL and start watching
In the same message, do both:
- Tell the reviewer the review URL Tailr printed, and that they should use it
…Read the whole file at its exact version.
How to install
mdr add gcrft123/tailr/tailr-start@sha256:37711288190e6846The line at the top of this page pins the label git:20260907.6b54c97, 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_jzwak6ifrwd5dito)
5 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between Sep 6, 2026 and Sep 7, 2026, about one every day.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260907.6b54c97 latest | 2026-09-07 | 6b54c97 | 2,251 B | A | view · diff |
| git:20260906.4ab2a67 | 2026-09-06 | 4ab2a67 | 2,164 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 (2251 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
gcrft123/tailr · 7 stars · license MIT · pushed 2026-10-08 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_jzwak6ifrwd5dito GET https://markdownregistry.com/api/v1/resolve?ref=gcrft123/tailr/tailr-start GET https://markdownregistry.com/api/v1/blob/37711288190e684627d3b68cb3a738c5310713259532912467193b721c341ad4
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.