preview-app SKILL.md skillA
preview-app from kyle-chalmers/streamsnow is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add kyle-chalmers/streamsnow/preview-app@git:20261019.17bf404Pins git:20261019.17bf404 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- kyle-chalmers/streamsnow
- Path
skills/preview-app/SKILL.md- Versions recorded
- 7
- Latest version
- git:20261019.17bf404, committed Oct 19, 2026
- First version recorded
- Sep 12, 2026
- Size
- 5,977 bytes
- Repository stars
- 13
- License
- MIT
Run an app locally against live Snowflake so the user can see it in the browser, wiring up secrets.toml first if missing. Use when the user says "preview my app", "run my app", "let me see it in the browser", or after /build-app scaffolds an app.
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
# /preview-app > **Repo overlay:** if `.streamsnow/overlays/preview-app.md` exists in this repo, read it first — committed, repo-specific additions/overrides ([_shared/overlays.md](../_shared/overlays.md)). Outside Claude Code, also read [_shared/other-agents.md](../_shared/other-agents.md). Launch `apps/<slug>` locally against live Snowflake and open it in the browser — the "see it before you ship it" step, ahead of /validate-app and /ship-app. `streamsnow preview` owns the whole lifecycle — detached launch, health polling, log capture, classified failures, teardown — so never hand-roll `streamlit run` + `nohup` + PID bookkeeping. This skill owns the interactive UX: slug confirmation, safe secrets provisioning, URL surfacing, triage. ## Lifecycle verbs - `streamsnow preview start <slug>` (bare `streamsnow preview <slug>` is shorthand for `start`) — verifies the entrypoint and port, launches `streamlit run` detached with output to a log, then polls the health endpoint until it answers or the timeout expires. `--port N` (`0`: any free), `--json`, `--review-capture DIR` (/sql-review), `--restart-if-stale` (Gotchas). Exit 0 = serving; …
Read the whole file at its exact version.
How to install
mdr add kyle-chalmers/streamsnow/preview-app@sha256:464997ad2631b4f6The line at the top of this page pins the label git:20261019.17bf404, 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_xcqjmt6ibgpjd2mf)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 7 versions of this file, between Sep 12, 2026 and Oct 19, 2026, about one every 6 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261019.17bf404 latest | 2026-10-19 | 17bf404 | 5,977 B | A | view · diff |
| git:20261007.b802960 | 2026-10-07 | b802960 | 5,955 B | A | view · diff |
| git:20261005.4101fb7 | 2026-10-05 | 4101fb7 | 5,910 B | A | view · diff |
| git:20261005.660dfe3 | 2026-10-05 | 660dfe3 | 5,894 B | A | view · diff |
| git:20261005.7db0ab8 | 2026-10-05 | 7db0ab8 | 5,894 B | A | view · diff |
| git:20260927.5061139 | 2026-09-27 | 5061139 | 5,904 B | A | view · diff |
| git:20260912.786b820 | 2026-09-12 | 786b820 | 5,789 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 (5977 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
kyle-chalmers/streamsnow · 13 stars · license MIT · pushed 2026-10-19 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_xcqjmt6ibgpjd2mf GET https://markdownregistry.com/api/v1/resolve?ref=kyle-chalmers/streamsnow/preview-app GET https://markdownregistry.com/api/v1/blob/464997ad2631b4f6de3c2087c088b1739abc5718a3203f113db107a0fcf282a4
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.