SQL Database Support for pREST
prest/prest
Guides classifying, gap-analyzing and scaffolding support for a new SQL database in pREST, from Postgres-compatible variants to entirely new dialects.
Optimize EF Core (Npgsql/PostgreSQL) queries in the .NET API — fix N+1, choose tracking modes, use compiled queries, split queries, and avoid translation traps.
Install Efcore Query Performance
$ npx skills add atherio-danp/cde-dotnetcc --skill efcore-query-performance -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install atherio-danp/cde-dotnetcc efcore-query-performance --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/atherio-danp/cde-dotnetcc.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.claude/skills/efcore-query-performance .claude/skills/efcore-query-performance && 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 "efcore-query-performance" agent skill from https://github.com/atherio-danp/cde-dotnetcc/tree/main/.claude/skills/efcore-query-performance into .claude/skills/efcore-query-performance/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "efcore-query-performance", 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/atherio-danp/cde-dotnetcc/tree/main/.claude/skills/efcore-query-performanceType 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 atherio-danp/cde-dotnetcc --skill efcore-query-performance -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install atherio-danp/cde-dotnetcc efcore-query-performance --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/atherio-danp/cde-dotnetcc.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.claude/skills/efcore-query-performance .agents/skills/efcore-query-performance && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "efcore-query-performance" agent skill from https://github.com/atherio-danp/cde-dotnetcc/tree/main/.claude/skills/efcore-query-performance into .agents/skills/efcore-query-performance/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "efcore-query-performance", 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 atherio-danp/cde-dotnetcc --skill efcore-query-performance -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install atherio-danp/cde-dotnetcc efcore-query-performance --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/atherio-danp/cde-dotnetcc.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.claude/skills/efcore-query-performance .cursor/skills/efcore-query-performance && 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 "efcore-query-performance" agent skill from https://github.com/atherio-danp/cde-dotnetcc/tree/main/.claude/skills/efcore-query-performance into .cursor/skills/efcore-query-performance/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "efcore-query-performance", 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/atherio-danp/cde-dotnetcc.git --path .claude/skills/efcore-query-performance--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 atherio-danp/cde-dotnetcc --skill efcore-query-performance -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install atherio-danp/cde-dotnetcc efcore-query-performance --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/atherio-danp/cde-dotnetcc.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.claude/skills/efcore-query-performance .gemini/skills/efcore-query-performance && 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 "efcore-query-performance" agent skill from https://github.com/atherio-danp/cde-dotnetcc/tree/main/.claude/skills/efcore-query-performance into .gemini/skills/efcore-query-performance/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "efcore-query-performance", 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 atherio-danp/cde-dotnetcc efcore-query-performanceInstalls 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 atherio-danp/cde-dotnetcc --skill efcore-query-performance -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/atherio-danp/cde-dotnetcc.git skills-src && mkdir -p .github/skills && cp -r skills-src/.claude/skills/efcore-query-performance .github/skills/efcore-query-performance && 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 "efcore-query-performance" agent skill from https://github.com/atherio-danp/cde-dotnetcc/tree/main/.claude/skills/efcore-query-performance into .github/skills/efcore-query-performance/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "efcore-query-performance", 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 atherio-danp/cde-dotnetcc --skill efcore-query-performance -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install atherio-danp/cde-dotnetcc efcore-query-performance --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/atherio-danp/cde-dotnetcc.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.claude/skills/efcore-query-performance .opencode/skills/efcore-query-performance && 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 "efcore-query-performance" agent skill from https://github.com/atherio-danp/cde-dotnetcc/tree/main/.claude/skills/efcore-query-performance into .opencode/skills/efcore-query-performance/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "efcore-query-performance", 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
efcore-query-performance- GitHub stars
- 109
- Token cost
- ~1.1k tokens
- SKILL.md length
- 386 words
- Files
- 1
- Skills in repo
- 13
- Repo updated
- First seen
- Licence
- None found
At a glance
Optimize EF Core (Npgsql/PostgreSQL) queries in the .NET API — fix N+1, choose tracking modes, use compiled queries, split queries, and avoid translation traps.
- Works in 6 steps: See the SQL first → Fix N+1 (the #1 killer) → AsNoTracking() on every read-only query → …
- A query is slow
- SKILL.md covers 1. See the SQL first, 2. Fix N+1 (the #1 killer), 3. AsNoTracking() on every… and 4. Compiled queries for hot…, plus 3 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Efcore Query Performance is an agent skill from atherio-danp/cde-dotnetcc. Optimize EF Core (Npgsql/PostgreSQL) queries in the .NET API — fix N+1, choose tracking modes, use compiled queries, split queries, and avoid translation traps. Use when a query is slow, emits excessive SQL, or causes high DB load. Complements the efcore-patterns scaffolding skill.
Its SKILL.md is about 1.1k 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 Query optimization, Translation and Project scaffolding. It works with PostgreSQL, SQL and .NET. The repository describes itself as: Claude Code harness for .NET developers.
When your agent uses it
- A query is slow
- Emits excessive SQL
- Causes high DB load
Example prompts
- “/efcore-query-performance”
Requirements
- Pre-approved tools (allowed-tools): Read, Glob, Grep, Bash, mcp__serena__initial_instructions, mcp__serena__get_symbols_overview, mcp__serena__find_symbol, mcp__serena__find_referencing_symbols, mcp__serena__find_declaration, mcp__serena__find_implementations, mcp__serena__search_for_pattern, mcp__serena__get_diagnostics_for_file, mcp__serena__list_dir, mcp__serena__find_file, mcp__serena__create_text_file, mcp__serena__replace_symbol_body, mcp__serena__insert_after_symbol, mcp__serena__insert_before_symbol, mcp__serena__replace_content, mcp__serena__rename_symbol, mcp__serena__safe_delete_symbol
Workflow steps
6 steps, taken from the step headings in SKILL.md.
- See the SQL first
- Fix N+1 (the #1 killer)
- AsNoTracking() on every read-only query
- Compiled queries for hot paths
- Translation traps (table)
- Raw / bulk
What it can do on your machine
Read from SKILL.md and the folder at commit c72a3f9. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves these tools, so the agent can use them without asking each time:
ReadGlobGrepBashmcp__serena__initial_instructionsmcp__serena__get_symbols_overviewmcp__serena__find_symbolmcp__serena__find_referencing_symbolsmcp__serena__find_declarationmcp__serena__find_implementations
…and 11 more on the same allowed-tools line.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md.
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
Efcore Query Performance loads about 1.1k tokens when it runs. Until then it costs about 77 tokens; SKILL.md has 386 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: notes
The automated check noted patterns worth knowing about, such as sudo or a known installer.
- NotePre-approves every shell command (allowed-tools: Bash)SKILL.md
allowed-tools: Read, Glob, Grep, Bash, mcp__serena__initial_instructions, mcp__serena__get_symbols_overview, mcp__s
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 386 words (~1,136 tokens).
“For our stack: EF Core with the Npgsql provider (NOT SQL Server). C# (.cs) edits via Serena. Source of truth: .claude/rules/backend/persistence.md + docs/projectStandards/backend-architecture.md §7. This is the performance companion to the efcore-patterns scaffolding skill.”
- name
- efcore-query-performance
- allowed-tools
- Read, Glob, Grep, Bash, mcp__serena__initial_instructions, mcp__serena__get_symbols_overview, mcp__serena__find_symbol, mcp__serena__find_referencing_symbols, mcp__serena__find_declaration, mcp__serena__find_implementations, mcp__serena__search_for_pattern, mcp__serena__get_diagnostics_for_file, mcp__serena__list_dir, mcp__serena__find_file, mcp__serena__create_text_file, mcp__serena__replace_symbol_body, mcp__serena__insert_after_symbol, mcp__serena__insert_before_symbol, mcp__serena__replace_content, mcp__serena__rename_symbol, mcp__serena__safe_delete_symbol
Files
Just SKILL.md in .claude/skills/efcore-query-performance of atherio-danp/cde-dotnetcc.
Open the folder on GitHubat commit c72a3f9
Compare with similar skills
Efcore Query Performance 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 |
|---|---|---|---|---|---|---|
| Efcore Query Performance this skillatherio-danp/cde-dotnetcc | 109 | — | ~1.1k | Automated safety check: Notes | None | |
| SQL Database Support for pRESTprest/prest | 4.6k | — | ~1.6k | Automated safety check: Pass | MIT | |
| PostgreSQL Documentation Reference2025Emma/vibe-coding-cn | 23k | 1 repos | ~19k | Automated safety check: Pass | MIT | |
| Postgresql Best Practices CloudbaseTencentCloudBase/CloudBase-AI-Toolkit | 1.1k | 1 repos | ~1.3k | Automated safety check: Pass | MIT | |
| SQL ProJeffallan/claude-skills | 12k | — | ~1.3k | Automated safety check: Pass | MIT | |
| SQL Insightzebbern/claude-code-guide | 4.7k | — | ~2.1k | Automated safety check: Pass | MIT |
Similar skills
PostgreSQL Documentation Reference
2025Emma/vibe-coding-cn
PostgreSQL database documentation - SQL queries, database design, administration, performance tuning, and advanced features. Use when working with PostgreSQL…
Postgresql Best Practices Cloudbase
TencentCloudBase/CloudBase-AI-Toolkit
CloudBase PostgreSQL access-pattern and slow-query quality guidance.
SQL Pro
Jeffallan/claude-skills
Optimizes SQL queries and designs schemas using CTEs, window functions, covering indexes and EXPLAIN ANALYZE, with notes on dialect differences between major databases.
SQL Insight
zebbern/claude-code-guide
Translate natural language to SQL, optimize query performance, and interpret EXPLAIN plans for SQLite and PostgreSQL.
- Official
SQL Optimization
github/awesome-copilot
Universal SQL performance optimization assistant for comprehensive query tuning, indexing strategies, and database performance analysis across all SQL databases (MySQL, PostgreSQL, SQL Server…
More from atherio-danp/cde-dotnetcc
All 13 skills in this repoMCP Csharp
atherio-danp/cde-dotnetcc
Create, debug, test, and publish MCP (Model Context Protocol) servers in C using the official ModelContextProtocol SDK — tools/prompts/resources, stdio vs HTTP transport, MapMcp hosting.
Microbenchmarking
atherio-danp/cde-dotnetcc
Create, run, configure, and interpret BenchmarkDotNet microbenchmarks in the .NET API — measure and compare approaches, runtime configs, or package versions.
Otel Instrumentation
atherio-danp/cde-dotnetcc
Add or change OpenTelemetry tracing, metrics, and structured logging in the .NET API (apps/api) — OTLP exporter setup, custom ActivitySource spans, IMeterFactory metrics, log/trace correlation.
Dotnet AI Stack
atherio-danp/cde-dotnetcc
Choose and wire AI features in the .NET backend — LLM calls, agentic tool-calling/multi-step workflows, RAG/vector search, structured output, streaming.
Dotnet Performance Review
atherio-danp/cde-dotnetcc
Scan .NET/C code for performance anti-patterns (async, memory/strings, collections/LINQ, regex, serialization, I/O) with tiered severity, reporting findings without editing.
Efcore Patterns
atherio-danp/cde-dotnetcc
Add or change EF Core (Npgsql/PostgreSQL) persistence in the .NET backend — entities, EF configurations, repositories, queries, migrations.
Related
Works with
Categories
Questions about Efcore Query Performance
What does Efcore Query Performance do?
Optimize EF Core (Npgsql/PostgreSQL) queries in the .NET API — fix N+1, choose tracking modes, use compiled queries, split queries, and avoid translation traps. Efcore Query Performance is an agent skill from atherio-danp/cde-dotnetcc.NET API — fix N+1, choose tracking modes, use compiled queries, split queries, and avoid translation traps.
When should I use Efcore Query Performance?
Efcore Query Performance fits situations like: A query is slow; emits excessive SQL; causes high DB load.
How do I install Efcore Query Performance in Claude Code?
Run `npx skills add atherio-danp/cde-dotnetcc --skill efcore-query-performance -a claude-code`. Or copy the skill folder (.claude/skills/efcore-query-performance in atherio-danp/cde-dotnetcc) into .claude/skills/efcore-query-performance in your project. Claude Code loads it when a task matches its description.
How do I install Efcore Query Performance in Codex?
Run `npx skills add atherio-danp/cde-dotnetcc --skill efcore-query-performance -a codex`. Or copy the skill folder (.claude/skills/efcore-query-performance in atherio-danp/cde-dotnetcc) into .agents/skills/efcore-query-performance in your project. Codex loads it when a task matches its description.
Can I use Efcore Query Performance 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 atherio-danp/cde-dotnetcc --skill efcore-query-performance -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/efcore-query-performance, .gemini/skills/efcore-query-performance, .github/skills/efcore-query-performance and .opencode/skills/efcore-query-performance in your project.
What does Efcore Query Performance need to run?
SKILL.md names no scripts, command-line tools or credentials: Efcore Query Performance is instructions for the agent only. Its frontmatter pre-approves these tools: Read, Glob, Grep, Bash, mcp__serena__initial_instructions, mcp__serena__get_symbols_overview, mcp__serena__find_symbol, mcp__serena__find_referencing_symbols, mcp__serena__find_declaration, mcp__serena__find_implementations, mcp__serena__search_for_pattern, mcp__serena__get_diagnostics_for_file, mcp__serena__list_dir, mcp__serena__find_file, mcp__serena__create_text_file, mcp__serena__replace_symbol_body, mcp__serena__insert_after_symbol, mcp__serena__insert_before_symbol, mcp__serena__replace_content, mcp__serena__rename_symbol, mcp__serena__safe_delete_symbol.
Does Efcore Query Performance 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 Efcore Query Performance safe to install?
Our automated static check of SKILL.md found notes only (pre-approves every shell command (allowed-tools: bash)), nothing it rates as a warning. It is not a guarantee. Review the folder before installing.
What licence does Efcore Query Performance use?
No licence was found for Efcore Query Performance or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.
How many tokens does Efcore Query Performance use?
About 1.1k tokens (SKILL.md is roughly 4.5k 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 Efcore Query Performance?
Skills that share tags, products or a category with Efcore Query Performance: SQL Database Support for pREST (prest/prest, 4.6k stars), PostgreSQL Documentation Reference (2025Emma/vibe-coding-cn, 23k stars), Postgresql Best Practices Cloudbase (TencentCloudBase/CloudBase-AI-Toolkit, 1.1k stars) and SQL Pro (Jeffallan/claude-skills, 12k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Efcore Query Performance?
atherio-danp (a GitHub user) maintains it in atherio-danp/cde-dotnetcc, which has 109 GitHub stars. The repository holds 13 skills in this directory. The repository was last updated on July 26, 2026.
Source: atherio-danp/cde-dotnetcc on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.