Agent Slayer ⚔️
Your rules. Copilot obeys.
Stop explaining your stack to Copilot on every single project.
Install once → setup wizard opens → pick your framework and database →
Copilot follows your rules automatically, forever.
Why Agent Slayer?
Every time you start a new project Copilot forgets everything.
It doesn't know your stack. It doesn't know your patterns.
It doesn't know you always use async/await, org_id scoping,
Pydantic v2, or that errors must return { error, code, detail }.
You end up repeating yourself. Every. Single. Project.
Agent Slayer fixes this.
Configure once. Works everywhere. Copilot finally knows who's boss.
Quick Start
- Install Agent Slayer from the Extensions panel
- Setup wizard opens automatically
- Pick your framework, database, and CI/CD platform
- Click Apply & Install
- Done — Copilot now follows your rules on every project
Supported Stacks
Frameworks
| Framework |
Language |
| FastAPI |
Python 3.11+ |
| Django + DRF |
Python |
| Express |
Node.js / TypeScript |
| Spring Boot |
Java / Kotlin |
Databases
| Database |
ORM / Driver |
| PostgreSQL |
AsyncSQLAlchemy / Prisma / JPA |
| MySQL |
AsyncSQLAlchemy / Prisma / JPA |
| MongoDB |
Motor / Mongoose / Spring Data |
- GitHub Actions
- GitLab CI
- Jenkins
- CircleCI
- Azure Pipelines
Features
Setup Wizard
Opens automatically on first install. Single page UI — pick your
framework, database, CI/CD platform and toggle rules on/off.
Reopen anytime via Command Palette.
Global Copilot Instructions
Automatically injects your stack rules into every Copilot suggestion
across all projects. No per-project config. No manual prompting.
8 Skill Prompt Files
Reusable step-by-step workflows for every common task.
| Command |
What it does |
/new-endpoint |
Full API endpoint — schema → model → CRUD → router → tests |
/new-feature |
End-to-end feature — plan → data → API → logic → tests → docs |
/db-query |
Safe scoped database queries with N+1 prevention |
/security-review |
Full security audit — CRITICAL/HIGH/MEDIUM/LOW with fixes |
/write-tests |
Complete test coverage — happy path + 401 + 403 + 404 + 422 |
/create-migration |
Alembic / Prisma / Flyway migrations with rollback |
/code-review |
Deep code review — bugs, performance, design issues |
/debug-and-fix |
Stack trace reading + error diagnosis + fixes |
@skills Chat Participant
Examples:
@skills create a new endpoint for sprint tracking@skills review this function for security issues@skills write tests for the auth module@skills debug this stack trace
Multi-Tenant Scoping
Toggle on org_id scoping — Copilot automatically adds
WHERE org_id = :org_id to every DB query. org_id always
injected from JWT, never from request body.
Live Config Reload
Change any setting → Copilot instructions update instantly.
No restart needed.
Commands
| Command |
Description |
Agent Slayer: Open Setup |
Open the setup wizard |
Agent Slayer: Re-run Setup |
Reset and reopen setup wizard |
Agent Slayer: Install Global Instructions |
Reapply all Copilot rules |
Agent Slayer: Install Prompt Files |
Reinstall skill prompt files |
Agent Slayer: Reset to Defaults |
Clear all Copilot instructions |
Agent Slayer: Show Status |
Show current config in output panel |
Configuration
All settings are written automatically by the Setup Wizard.
You can also edit them manually in VS Code settings:
| Setting |
Default |
Options |
agentSlayer.frontendFramework |
none |
none, react, nextjs, vue, angular |
agentSlayer.stack |
fastapi |
fastapi, django, flask, nodejs |
agentSlayer.database |
postgresql |
postgresql, mysql, mongodb, sqlite |
agentSlayer.cicd |
["github"] |
github, gitlab, jenkins, circleci, azure |
agentSlayer.multiTenant |
true |
true / false |
agentSlayer.strictErrorFormat |
true |
true / false |
agentSlayer.autoInstallOnStartup |
true |
true / false |
agentSlayer.orgIdField |
org_id |
any string |
agentSlayer.testFramework |
pytest |
pytest, jest, unittest |
How Skill Files Work
After install, prompt files are copied to your global VS Code
prompts folder. Use them in Copilot Chat:
/new-endpoint create POST /sprints with name and start_date/write-tests generate tests for routers/sprints.py/security-review (select code first, then run this)/debug-and-fix (paste your stack trace)
Files are installed at:
- Windows:
%APPDATA%\\Code\\User\\prompts\\
- Mac:
~/Library/Application Support/Code/User/prompts/
- Linux:
~/.config/Code/User/prompts/
Requirements
- VS Code 1.100.0 or higher
- GitHub Copilot extension installed and active
Release Notes
See CHANGELOG.md.
License
MIT — see LICENSE.
Contributing
Issues and PRs welcome at
https://github.com/agentslayer/agent-slayer
Agent Slayer — Your rules. Copilot obeys.
