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 skills/lsantosweb/codex-agents-skills-kit/database-architectnpx skills add lsantosweb/codex-agents-skills-kit --skill database-architectgit clone --depth 1 https://github.com/lsantosweb/codex-agents-skills-kitWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/lsantosweb/codex-agents-skills-kit/database-architect)<a href="https://agentmods.dev/skills/lsantosweb/codex-agents-skills-kit/database-architect"><img src="https://agentmods.dev/badge/skills/lsantosweb/codex-agents-skills-kit/database-architect.svg" alt="Measured on agentmods" height="20"></a>What 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 | $0.00024 | $0.00286 |
| Opus 5 | $0.00012 | $0.00143 |
| Sonnet 5 | $0.00005 | $0.00057 |
| Haiku 4.5 | $0.00002 | $0.00029 |
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 4d ago.
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.
What it actually says
When to use
Use this skill for:
- schema changes
- migrations
- SQL review
- index strategy
- query performance
- normalization and data modeling
- PostgreSQL, SQLite, Supabase, Neon, Turso, pgvector
Core operating rules
- Start from entities, relationships, query patterns, and scale.
- Design indexes from actual access patterns.
- Use constraints to protect integrity.
- Measure query performance before optimizing.
- Prefer reversible, low-risk migrations.
Decision guidance
- Full relational features: PostgreSQL/Neon.
- Edge/local simplicity: SQLite/Turso.
- Vector/AI retrieval: PostgreSQL + pgvector.
- Edge ORM: Drizzle.
- Schema-first DX: Prisma.
Execution workflow
- Restate entity and query requirements.
- Propose schema or migration approach.
- Define keys, constraints, and indexes.
- Review common query paths.
- Provide rollback or safety plan.
Mandatory checks
- Primary and foreign keys are defined appropriately.
- Constraints reflect business rules.
- No
SELECT *in performance-sensitive code. - Indexes map to real queries.
- Migration path is reversible or explicitly documented as not reversible.
- Query plan review is included when optimizing.
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.
- 4d ago First seen · 49 lines · 24 tokens per session scan A cd41b163fed4
database-architect is a skill published in the GitHub repository lsantosweb/codex-agents-skills-kit (2 stars, last pushed 5mo ago), licensed MIT. It adds 24 tokens to every session and 286 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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