explore SKILL.md skillA
explore from exmergo/dex is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add exmergo/dex/explore@git:20261019.d2d852aPins git:20261019.d2d852a in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- exmergo/dex
- Path
skills/explore/SKILL.md- Versions recorded
- 16
- Latest version
- git:20261019.d2d852a, committed Oct 19, 2026
- First version recorded
- Aug 27, 2026
- Size
- 13,900 bytes
- Repository stars
- 88
- License
- Apache-2.0
Use this whenever you need to know what is actually in a database, warehouse, or DuckDB file before you trust it: inventory, column profiles, PII detection, grain and data-quality problems, verified joins, ER diagrams, ad-hoc SQL probes, segmentation, and the semantic layer a repo declares (dbt, Apache Ossie, or SLayer). Trigger it on an unmet precondition, not on phrasing: if you are about to write or fix SQL against tables whose columns, types, grain, or join keys you have not verified in…
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
# Explore Make sense of a warehouse or a local DuckDB database the way an analytics engineer does: rank what matters, drill selectively, and persist a draft map in `.dex/`. This skill is read-only: it writes nothing but the `.dex/` cache. <!-- dex:procedure:begin --> ## Procedure dex works in one loop: explore, transform, maintain. Every step runs one engine command, reads the single JSON envelope it prints, and decides the next step from that envelope. 1. **Explore before you write.** Before writing or fixing SQL against a table whose columns, types, grain, or join keys you have not verified in this session, run `explore map` (or `explore profile <tables>` for a few named ones) and read its grain, keys, PII flags, and data-quality findings. Answer ad-hoc questions with `explore query`, never with a raw database client. 2. **Plan the change.** Author the file content and hand it to `transform plan` (or `semantic define|update|plan` for the semantic layer). Nothing is written yet. Read the diffs, the `warnings`, and, on a model that already exists, `data.row_attribution`; re-plan until they describe the change you meant. …
Read the whole file at its exact version.
How to install
mdr add exmergo/dex/explore@sha256:fc94ef5a8f166938The line at the top of this page pins the label git:20261019.d2d852a, 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_7y6hdsxhgmckwv5c)
6 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 16 versions of this file, between Aug 27, 2026 and Oct 19, 2026, about one every 4 days. Its first recorded version is graded B and its latest A.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261019.d2d852a latest | 2026-10-19 | d2d852a | 13,900 B | A | view · diff |
| git:20261019.3ab87d0 | 2026-10-19 | 3ab87d0 | 13,508 B | A | view · diff |
| git:20261018.7b1c7bc | 2026-10-18 | 7b1c7bc | 13,309 B | A | view · diff |
| git:20261014.e918bad | 2026-10-14 | e918bad | 12,704 B | A | view · diff |
| git:20261014.e731395 | 2026-10-14 | e731395 | 12,831 B | A | view · diff |
| git:20261012.7f9a0ba | 2026-10-12 | 7f9a0ba | 12,622 B | A | view · diff |
| git:20261012.3213224 | 2026-10-12 | 3213224 | 12,552 B | A | view · diff |
| git:20261011.8dd6aa2 | 2026-10-11 | 8dd6aa2 | 11,846 B | A | view · diff |
| git:20261008.49fc23d | 2026-10-08 | 49fc23d | 11,786 B | B | view · diff |
| git:20260916.898c818 | 2026-09-16 | 898c818 | 27,087 B | B | view · diff |
| git:20260906.9a46d77 | 2026-09-06 | 9a46d77 | 26,652 B | B | view · diff |
| git:20260902.bfe286a | 2026-09-02 | bfe286a | 25,692 B | B | view · diff |
| git:20260901.3687a82 | 2026-09-01 | 3687a82 | 25,007 B | B | view · diff |
| git:20260831.ddd117d | 2026-08-31 | ddd117d | 24,227 B | B | view · diff |
| git:20260827.6980e14 | 2026-08-27 | 6980e14 | 23,606 B | B | view · diff |
| git:20260827.6ff550b | 2026-08-27 | 6ff550b | 23,830 B | B | 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 (13900 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
exmergo/dex · 88 stars · license Apache-2.0 · pushed 2026-10-19 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_7y6hdsxhgmckwv5c GET https://markdownregistry.com/api/v1/resolve?ref=exmergo/dex/explore GET https://markdownregistry.com/api/v1/blob/fc94ef5a8f166938b23521862f087faeed24890169417f4e387b04d98b62b8f9
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.