language-sql SKILL.md skillA
language-sql from lugassawan/swe-workbench is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add lugassawan/swe-workbench/language-sql@git:20260828.71a6399Pins git:20260828.71a6399 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- lugassawan/swe-workbench
- Path
skills/language-sql/SKILL.md- Versions recorded
- 5
- Latest version
- git:20260828.71a6399, committed Aug 28, 2026
- First version recorded
- Jun 10, 2026
- Size
- 7,128 bytes
- Repository stars
- 3
- License
- MIT
SQL idioms — query tuning, table definitions, constraints, transactions, and pagination. Auto-load when working with .sql files or migrations, or when the user mentions SELECT, JOIN, EXPLAIN, CTE, window functions, or SQL indexes.
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
# SQL ## Query optimization basics - Start with the access pattern: filters, joins, grouping, sorting, and result size. - Index columns used for selective `WHERE`, join keys, and stable `ORDER BY` clauses. - Prefer narrow projections over `SELECT *`; return only the columns callers need. - Avoid accidental row multiplication in joins; check cardinality before adding `DISTINCT`. - Watch for N+1 query loops at application boundaries. ## EXPLAIN and EXPLAIN ANALYZE - Use `EXPLAIN` to inspect the planned access path before changing indexes or query shape. - Use `EXPLAIN ANALYZE` when you need actual timing and row counts; run it against safe data and statements. - Compare estimated vs actual rows. Large gaps often mean stale statistics, skewed data, or missing predicates. - Optimize the highest-cost operation first, but confirm the full query got faster. ## Schema design - Model durable facts, not current screens. Let queries influence indexes, not table names. - Choose primary keys deliberately; use foreign keys for integrity unless there is a measured reason not to. - Normalize to remove update anomalies, then denormalize only for proven read pressure. …
Read the whole file at its exact version.
How to install
mdr add lugassawan/swe-workbench/language-sql@sha256:1abc7bc103fc94c3The line at the top of this page pins the label git:20260828.71a6399, 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_xdmmfoufuj3b3vcx)
1 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Jun 10, 2026 and Aug 28, 2026, about one every 20 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260828.71a6399 latest | 2026-08-28 | 71a6399 | 7,128 B | A | view · diff |
| git:20260802.f2c6c68 | 2026-08-02 | f2c6c68 | 7,222 B | A | view · diff |
| git:20260711.f993026 | 2026-07-11 | f993026 | 5,116 B | A | view · diff |
| git:20260623.a686e99 | 2026-06-23 | a686e99 | 4,394 B | A | view · diff |
| git:20260610.15ccb56 | 2026-06-10 | 15ccb56 | 4,095 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 (7128 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
lugassawan/swe-workbench · 3 stars · license MIT · pushed 2026-11-07 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_xdmmfoufuj3b3vcx GET https://markdownregistry.com/api/v1/resolve?ref=lugassawan/swe-workbench/language-sql GET https://markdownregistry.com/api/v1/blob/1abc7bc103fc94c36897abbbb943ce5b975e4ad3251b68a575aff70c40b73d94
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.