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 skills add HoangNguyen0403/agent-skills-standard --skill database-transactionsgit clone --depth 1 https://github.com/HoangNguyen0403/agent-skills-standardWrote 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/hoangnguyen0403/agent-skills-standard/database-transactions)<a href="https://agentmods.dev/skills/hoangnguyen0403/agent-skills-standard/database-transactions"><img src="https://agentmods.dev/badge/skills/hoangnguyen0403/agent-skills-standard/database-transactions/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/hoangnguyen0403/agent-skills-standard/database-transactions"><img src="https://agentmods.dev/badge/skills/hoangnguyen0403/agent-skills-standard/database-transactions.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 | $0.00035 | $0.00283 |
| Opus 5 | $0.00017 | $0.00142 |
| Sonnet 5 | $0.00007 | $0.00057 |
| Haiku 4.5 | $0.00003 | $0.00028 |
Grade A, and why
database-transactions 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 9d 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
Database Transactions
Priority: P0 (CRITICAL)
One business action should have one clear consistency strategy.
Rules
- Define the unit of work before choosing transaction scope.
- Keep transaction bodies short and purposeful.
- Record isolation, lock, retry, and idempotency expectations for contested writes.
- Split eventually consistent workflows from truly atomic ones.
Verify
- Transaction boundary matches one business action.
- Isolation or locking tradeoff is explicit.
- Retry and idempotency behavior is defined for duplicate or concurrent requests.
- External side effects are not hidden inside a DB transaction without compensation.
Anti-Patterns
- No giant transaction scripts: long units increase contention and failure blast radius.
- No retry without idempotency: duplicate writes become correctness bugs.
- No mixed atomicity story: define what is immediate vs eventual.
References
What ships with it
2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 9d ago First seen · 43 lines · 35 tokens per session scan A f9b7cb769cca
database-transactions is a skill published in the GitHub repository HoangNguyen0403/agent-skills-standard (565 stars, last pushed 3d ago), licensed MIT. It adds 35 tokens to every session and 283 once invoked, about $0.0002 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 2026-09-03.
Other skills, from other repositories
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database-design
Schema design, normalization, query optimization, and data modeling patterns.
postgresql
Skill "postgresql" from dhaupin/vant, covering postgresql, when to use, what to do, 1. connect and 2. common queries.
redis
Skill "redis" from dhaupin/vant, covering redis, when to use, what to do, 1. connect and 2. operations.
supabase
Skill "supabase" from dhaupin/vant, covering supabase, when to use, what to do, 1. connect and supabase-js.
sql
SELECT columns FROM table WHERE condition ORDER BY column LIMIT n.