SQL Optimization Patterns
ynulihao/AgentSkillOS
Master SQL query optimization, indexing strategies, and EXPLAIN analysis to dramatically improve database performance and eliminate slow queries.
Guidance for SQL query optimization tasks. An agent skill from lazyFrogLOL/Harness_Engineering.
Install Query Optimize
$ npx skills add lazyFrogLOL/Harness_Engineering --skill query-optimize -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install lazyFrogLOL/Harness_Engineering query-optimize --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/lazyFrogLOL/Harness_Engineering.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/query-optimize .claude/skills/query-optimize && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "query-optimize" agent skill from https://github.com/lazyFrogLOL/Harness_Engineering/tree/master/skills/query-optimize into .claude/skills/query-optimize/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "query-optimize", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/lazyFrogLOL/Harness_Engineering/tree/master/skills/query-optimizeType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add lazyFrogLOL/Harness_Engineering --skill query-optimize -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install lazyFrogLOL/Harness_Engineering query-optimize --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/lazyFrogLOL/Harness_Engineering.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/query-optimize .agents/skills/query-optimize && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "query-optimize" agent skill from https://github.com/lazyFrogLOL/Harness_Engineering/tree/master/skills/query-optimize into .agents/skills/query-optimize/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "query-optimize", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add lazyFrogLOL/Harness_Engineering --skill query-optimize -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install lazyFrogLOL/Harness_Engineering query-optimize --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/lazyFrogLOL/Harness_Engineering.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/query-optimize .cursor/skills/query-optimize && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "query-optimize" agent skill from https://github.com/lazyFrogLOL/Harness_Engineering/tree/master/skills/query-optimize into .cursor/skills/query-optimize/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "query-optimize", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/lazyFrogLOL/Harness_Engineering.git --path skills/query-optimize--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add lazyFrogLOL/Harness_Engineering --skill query-optimize -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install lazyFrogLOL/Harness_Engineering query-optimize --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/lazyFrogLOL/Harness_Engineering.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/query-optimize .gemini/skills/query-optimize && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "query-optimize" agent skill from https://github.com/lazyFrogLOL/Harness_Engineering/tree/master/skills/query-optimize into .gemini/skills/query-optimize/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "query-optimize", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install lazyFrogLOL/Harness_Engineering query-optimizeInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add lazyFrogLOL/Harness_Engineering --skill query-optimize -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/lazyFrogLOL/Harness_Engineering.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/query-optimize .github/skills/query-optimize && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "query-optimize" agent skill from https://github.com/lazyFrogLOL/Harness_Engineering/tree/master/skills/query-optimize into .github/skills/query-optimize/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "query-optimize", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add lazyFrogLOL/Harness_Engineering --skill query-optimize -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install lazyFrogLOL/Harness_Engineering query-optimize --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/lazyFrogLOL/Harness_Engineering.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/query-optimize .opencode/skills/query-optimize && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "query-optimize" agent skill from https://github.com/lazyFrogLOL/Harness_Engineering/tree/master/skills/query-optimize into .opencode/skills/query-optimize/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "query-optimize", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
query-optimize- GitHub stars
- 128
- Token cost
- ~2.1k tokens
- SKILL.md length
- 1,038 words
- Files
- 1
- Skills in repo
- 32
- Repo updated
- First seen
- Licence
- None found
At a glance
Guidance for SQL query optimization tasks. An agent skill from lazyFrogLOL/Harness_Engineering.
- Works in 5 steps: Establish Performance Baselines → Analyze Query Plans → Identify Common Performance Issues → …
- Tasks that involve SQL
- SKILL.md covers Core Optimization Workflow, Verification Strategy, Common Pitfalls and Iterative Refinement Process, plus 1 more section
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Query Optimize is an agent skill from lazyFrogLOL/Harness_Engineering. Guidance for SQL query optimization tasks. This skill should be used when optimizing slow SQL queries, improving database performance, or rewriting queries to be more efficient. Covers query plan anal
Its SKILL.md is about 2.1k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Databases, covering SQL and Query optimization. It works with SQL.
When your agent uses it
- Tasks that involve SQL
- Tasks that involve Query optimization
Example prompts
- “/query-optimize”
Workflow steps
5 steps, taken from the step headings in SKILL.md.
- Establish Performance Baselines
- Analyze Query Plans
- Identify Common Performance Issues
- Apply Optimization Techniques
- Database-Specific Considerations
What it can do on your machine
Read from SKILL.md and the folder at commit cae3b25. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md (its code samples are sql).
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Query Optimize loads about 2.1k tokens when it runs. Until then it costs about 54 tokens; SKILL.md has 1,038 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
Without a licence we can't republish the file, so here is its outline and opening line. It has 1,038 words (~2,062 tokens).
“This skill provides procedural guidance for optimizing SQL queries effectively, with emphasis on proper benchmarking, query plan analysis, and iterative refinement.”
- name
- query-optimize
Files
Just SKILL.md in skills/query-optimize of lazyFrogLOL/Harness_Engineering.
Open the folder on GitHubat commit cae3b25
Compare with similar skills
Query Optimize next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Query Optimize this skilllazyFrogLOL/Harness_Engineering | 128 | — | ~2.1k | Automated safety check: Pass | None | |
| SQL Optimization Patternsynulihao/AgentSkillOS | 617 | 11 repos | ~3.3k | Automated safety check: Pass | None | |
| Query Engine Designrevfactory/claude-code-harness | 120 | — | ~474 | Automated safety check: Pass | None | |
| SQL Optimization Patternssickn33/agentic-awesome-skills | 47k | 1 repos | ~566 | Automated safety check: Pass | MIT | |
| SQL Database Assistantborghei/Claude-Skills | 881 | — | ~1.5k | Automated safety check: Pass | MIT | |
| SQL Optimization InterviewerPrepLabsAI/InterviewMentor | 112 | — | ~2.1k | Automated safety check: Pass | MIT |
Similar skills
Query Engine Design
revfactory/claude-code-harness
SQL query engine design and implementation guide. An agent skill from revfactory/claude-code-harness.
SQL Optimization Patterns
sickn33/agentic-awesome-skills
Diagnose slow SQL with query plans, preserve query results, and verify indexing or query changes against representative data.
SQL Database Assistant
borghei/Claude-Skills
This skill should be used when the user asks to "optimize SQL queries", "explore database schemas", "generate migration SQL", "analyze query performance", or "document database structure".
SQL Optimization Interviewer
PrepLabsAI/InterviewMentor
A Data Engineering interviewer focused on database performance.
Writing SQL
rileyhilliard/claude-essentials
Staff+ DBA SQL patterns targeting what Claude's defaults miss - multi-column statistics, operator classes, keyset pagination, silent performance anti-patterns.
More from lazyFrogLOL/Harness_Engineering
All 32 skills in this repoDistribution Search
lazyFrogLOL/Harness_Engineering
Guidance for finding probability distributions that satisfy specific statistical constraints such as KL divergence targets, entropy requirements, or moment conditions.
Prove Plus Comm
lazyFrogLOL/Harness_Engineering
Guide for completing Coq proofs involving arithmetic properties like addition commutativity.
Raman Fitting
lazyFrogLOL/Harness_Engineering
This skill provides guidance for fitting peaks in Raman spectroscopy data, particularly for materials like graphene.
Chess Best Move
lazyFrogLOL/Harness_Engineering
Guide for analyzing chess positions from images and determining optimal moves.
Crack 7z Hash
lazyFrogLOL/Harness_Engineering
This skill provides guidance for cracking 7z archive password hashes.
Feal Linear Cryptanalysis
lazyFrogLOL/Harness_Engineering
This skill provides guidance for FEAL cipher linear cryptanalysis tasks.
Related
Works with
Categories
Questions about Query Optimize
What does Query Optimize do?
Guidance for SQL query optimization tasks. An agent skill from lazyFrogLOL/Harness_Engineering. Query Optimize is an agent skill from lazyFrogLOL/Harness_Engineering. Guidance for SQL query optimization tasks.
When should I use Query Optimize?
Query Optimize fits situations like: tasks that involve SQL; tasks that involve Query optimization.
How do I install Query Optimize in Claude Code?
Run `npx skills add lazyFrogLOL/Harness_Engineering --skill query-optimize -a claude-code`. Or copy the skill folder (skills/query-optimize in lazyFrogLOL/Harness_Engineering) into .claude/skills/query-optimize in your project. Claude Code loads it when a task matches its description.
How do I install Query Optimize in Codex?
Run `npx skills add lazyFrogLOL/Harness_Engineering --skill query-optimize -a codex`. Or copy the skill folder (skills/query-optimize in lazyFrogLOL/Harness_Engineering) into .agents/skills/query-optimize in your project. Codex loads it when a task matches its description.
Can I use Query Optimize in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add lazyFrogLOL/Harness_Engineering --skill query-optimize -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/query-optimize, .gemini/skills/query-optimize, .github/skills/query-optimize and .opencode/skills/query-optimize in your project.
What does Query Optimize need to run?
SKILL.md names no scripts, command-line tools or credentials: Query Optimize is instructions for the agent only.
Does Query Optimize access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Query Optimize safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Query Optimize use?
No licence was found for Query Optimize or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.
How many tokens does Query Optimize use?
About 2.1k tokens (SKILL.md is roughly 8.2k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Query Optimize?
Skills that share tags, products or a category with Query Optimize: SQL Optimization Patterns (ynulihao/AgentSkillOS, 617 stars), Query Engine Design (revfactory/claude-code-harness, 120 stars), SQL Optimization Patterns (sickn33/agentic-awesome-skills, 47k stars) and SQL Database Assistant (borghei/Claude-Skills, 881 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Query Optimize?
lazyFrogLOL (a GitHub user) maintains it in lazyFrogLOL/Harness_Engineering, which has 128 GitHub stars. The repository holds 32 skills in this directory. The repository was last updated on May 18, 2026.
Source: lazyFrogLOL/Harness_Engineering on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.