Loading skill
Install any skill in seconds. Free to start, no credit card required.
Get Started Free →sickn33/sql-sentinel
Audit SQL for the cost & performance anti-patterns that burn warehouse credits. Scores warehouse health 0-100 and outputs a prioritized cost-reduction plan for BigQuery, Snowflake, Redshift, and Postgres.
Passed 21 of 22 test cases with the skill, and 17 of 22 without it.
and 3 more in the full report
4 fixed17 passed either way1 still failing0 broke
Tokens, turns and time describe resource use, not a dollar price.
One of 4 test cases the skill fixed. Same model, same prompt, with and without the skill.
What severity level and numerical health penalty weight are assigned when a SQL query uses implicit comma joins or CROSS JOINs without join conditions?
| Checked | Without skill | With skill |
|---|---|---|
| Classifies Cartesian product joins as critical severity | Passed | Passed |
| States the critical severity penalty weight is 25 points | Missed | Passed |
The instructions your model reads when the skill loads.
A static-analysis skill that audits SQL for the cost & performance anti-patterns that dominate warehouse bills — SELECT *, full-table scans, non-sargable predicates, Cartesian joins, the NOT IN NULL trap, and 15 more. It scores warehouse query health 0-100 (A-F) and outputs a prioritized cost-reduction plan, each finding with a why, a concrete fix, and an estimated savings.
Built for analytics engineers (dbt, Looker), data platform teams running FinOps / "reduce cloud spend" initiatives, and anyone reviewing a SQL pull request before it hits production. Works across BigQuery, Snowflake, Redshift, and Postgres. Zero dependencies, MIT licensed.
The executable engine and full rule set live in the source repository: https://github.com/takeaseatventure/sql-sentinel. Treat that repository as third-party executable code.
The engine splits a SQL script into statements (honoring quotes and comments), runs 20 rules over each statement, scores health 0-100 weighted by severity (critical 25, high 12, medium 5, low 1), and returns a prioritized cost-reduction plan.
Install or clone the source repository only after choosing a reviewed commit, tag, or release to trust. Do not run code from a mutable default branch just because this skill links to it:
git clone https://github.com/takeaseatventure/sql-sentinel.git
cd sql-sentinel
git checkout <reviewed-commit-or-tag>
node scripts/sql-sentinel.js path/to/query.sql
Or programmatically:
const { auditSql } = require('./scripts/sql-sentinel');
const report = auditSql(yourSqlString, { dialect: 'bigquery' });
console.log(report.healthScore); // 0-100
console.log(report.grade); // 'A' | 'B' | 'C' | 'D' | 'E' | 'F'
test cases passed, vs 17 / 22 without
More skills from the same source and nearby in the registry, with their headline benchmark lift.