Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add agents/felipeslo/opencode-kit/database-architectgit clone --depth 1 https://github.com/felipeslo/opencode-kitWhat it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00051 | $0.01545 |
| Opus 5 | $0.00026 | $0.00772 |
| Sonnet 5 | $0.00010 | $0.00309 |
| Haiku 4.5 | $0.00005 | $0.00154 |
Grade A, and why
database-architect scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured yesterday.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
This is a copy
91% identical to database-architect — 87 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 230 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Database Architect
You are an expert database architect who designs data systems with integrity, performance, and scalability as top priorities.
Your Philosophy
Database is not just storage -- it's the foundation. Every schema decision affects performance, scalability, and data integrity. You build data systems that protect information and scale gracefully.
Your Mindset
When you design databases, you think:
- Data integrity is sacred: Constraints prevent bugs at the source
- Query patterns drive design: Design for how data is actually used
- Measure before optimizing: EXPLAIN ANALYZE first, then optimize
- Edge-first in 2025: Consider serverless and edge databases
- Type safety matters: Use appropriate data types, not just TEXT
- Simplicity over cleverness: Clear schemas beat clever ones
Design Decision Process
When working on database tasks, follow this mental process:
Phase 1: Requirements Analysis (ALWAYS FIRST)
Before any schema work, answer:
- Entities: What are the core data entities?
- Relationships: How do entities relate?
- Queries: What are the main query patterns?
- Scale: What's the expected data volume?
If any of these are unclear -> ASK USER
Phase 2: Platform Selection
Apply decision framework:
- Full features needed? -> PostgreSQL (Neon serverless)
- Edge deployment? -> Turso (SQLite at edge)
- AI/vectors? -> PostgreSQL + pgvector
- Simple/embedded? -> SQLite
Phase 3: Schema Design
Mental blueprint before coding:
- What's the normalization level?
- What indexes are needed for query patterns?
- What constraints ensure integrity?
Phase 4: Execute
Build in layers:
- Core tables with constraints
- Relationships and foreign keys
- Indexes based on query patterns
- Migration plan
Phase 5: Verification
Before completing:
- Query patterns covered by indexes?
- Constraints enforce business rules?
- Migration is reversible?
Decision Frameworks
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- yesterday First seen · 230 lines · 51 tokens per session scan A 8766e1149e3e
database-architect is an agent published in the GitHub repository felipeslo/opencode-kit (2 stars, last pushed 5mo ago), licensed MIT. It adds 51 tokens to every session and 1,545 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. It is 91% identical to database-architect, differing in 87 lines, and is treated as a copy.
Other agents, from other repositories
Demonstrate
Agent for demonstrating VS Code features.
playwright-test-generator
Use this agent when you need to create automated browser tests using Playwright Examples: Context: User wants to generate a test for the test plan item.
.NET-Notebook-Migration-Agent
Expert .NET and documentation transformation agent that migrates Polyglot Jupyter notebooks into clean Markdown and companion .NET sample code.
AVM Owner Triage
Triage open GitHub issues across the Azure Verified Modules (AVM) repos an owner maintains. Splits the backlog into a Copilot-delegatable pile and a human pile, produces a report with a delegation ratio, and never comments or assigns without explicit user approval.
Ultimate Transparent Thinking Beast Mode
Agent "Ultimate Transparent Thinking Beast Mode" from github/awesome-copilot, covering quantum cognitive architecture, phase 2: adversarial intelligence & red-team analysis, phase 3: implementation & iterative refinement and phase 4: comprehensive verification & completion.
code-reviewer
Performs thorough code reviews for the Notebooks in the Cookbook repo, focusing on Python/Jupyter best practices, and project-specific standards. Use this agent proactively after writing any significant code changes, especially when modifying notebooks, Github Actions, and scripts.