Borrowing it
Nothing to install: this file belongs to Vinix24/vnx-orchestration. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/Vinix24/vnx-orchestration/main/.claude/skills/database-engineer/SKILL.mdgit clone --depth 1 https://github.com/Vinix24/vnx-orchestrationWrote 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/vinix24/vnx-orchestration/database-engineer)<a href="https://agentmods.dev/skills/vinix24/vnx-orchestration/database-engineer"><img src="https://agentmods.dev/badge/skills/vinix24/vnx-orchestration/database-engineer/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/vinix24/vnx-orchestration/database-engineer"><img src="https://agentmods.dev/badge/skills/vinix24/vnx-orchestration/database-engineer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 5.1 | $0.00000 | $0.03712 |
| Opus 5.5 | $0.00000 | $0.01485 |
| Sonnet 5.5 | $0.00000 | $0.00742 |
| Haiku 4.5 | $0.00000 | $0.00371 |
Grade A, and why
database-engineer 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 1mo 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.
How it starts
The opening of the file, as written. The whole thing — 198 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Database Engineer
SQLite-domain specialist for migrations and data integrity.
Core Mission
Migrations are integration code. Most "data" bugs aren't algorithmic — they're contract bugs between schema, importer, and verifier. This skill exists because P4 (the VNX one-shot consolidation migrator) consumed 5 fix-forward rounds before converging, and the bugs were almost entirely SQLite/multi-tenant gotchas a generalist would miss.
The specific recurring failure-modes are catalogued in references/bug-taxonomy.md with concrete VNX examples. Read it before writing any migration code.
When to Use
- Writing or editing files under
schemas/migrations/ - Touching
_import_table,_compare_counts, or any code that ATTACHes / SELECTs / INSERTs across tenant boundaries - Designing UNIQUE constraints or primary keys for any table that will hold multi-project rows
- Adding
JOINor correlated-subquery code that scans tables ≥10k rows - Debugging a migration that "completed" but produced wrong row counts
- Operator complains "stuck at 100% CPU for hours" — likely O(N×M) (see
references/sqlite-fts5-gotchas.md) - Any code that calls
INSERT OR IGNOREorINSERT OR REPLACE
STEP 0 — Foundational Check (Mandatory)
BEFORE proposing any design, fix, or implementation:
-
Consult relevant ADRs in
docs/governance/decisions/. Special attention to:- ADR-005 (NDJSON audit ledger as primary observability)
- ADR-007 (multi-tenant project_id stamping; composite keys for central state DBs)
- ADR-010 (subprocess adapter as canonical Claude routing) List any ADR that applies to the task and how it constrains your solution.
-
Consult relevant memory in
~/.claude/projects/-Users-vincentvandeth-Development-vnx-dev-githost/memory/MEMORY.md— particularly entries about past architectural incidents. -
Check P4-style incident docs in
claudedocs/for analogous failures (e.g.,2026-05-09-p4-migration-architecture-lessons.mdfor multi-tenant migration patterns).
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.
- 1mo ago First seen · 198 lines · 0 tokens per session scan A 97584fcaa5b6
database-engineer is a skill published in the GitHub repository Vinix24/vnx-orchestration (62 stars, last pushed today), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 3,712 tokens. 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 2026-08-30.
Other skills, from other repositories
database-patterns
Database design and implementation patterns for modern applications. Use when designing schemas, writing migrations, optimizing queries, and configuring ORMs. Covers PostgreSQL, MongoDB, Prisma, Drizzle, indexing strategies, and security best practices.
oma-db
Design schemas and migrations, tune queries, or plan vector retrieval and database operations. Application API implementation uses oma-backend.
sql_query
A procedure for answering data questions with read-only SQL queries, such as counting users or orders. It first finds the available data source and relevant tables, then checks their columns before running a query.
agent-teams
Coordinates Claude agent teams via filesystem protocol. Use when orchestrating parallel agents with task dependencies. Do not use for single-agent tasks.
browser-7008e942
An IndexedDB skill for putting, reading, and deleting records in browser storage. IndexedDB is a built-in browser database for structured local data.
schema
Designing database schemas, migrations, and multi-tenant architecture: RLS, tenant routing, provisioning, quotas, and isolation. Not for query-plan tuning (Tuner).