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 seed-forge/harness-ai-kit --skill public-mysql-expert-basegit clone --depth 1 https://github.com/seed-forge/harness-ai-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/seed-forge/harness-ai-kit/public-mysql-expert-base)<a href="https://agentmods.dev/skills/seed-forge/harness-ai-kit/public-mysql-expert-base"><img src="https://agentmods.dev/badge/skills/seed-forge/harness-ai-kit/public-mysql-expert-base/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/seed-forge/harness-ai-kit/public-mysql-expert-base"><img src="https://agentmods.dev/badge/skills/seed-forge/harness-ai-kit/public-mysql-expert-base.svg" alt="Reviewed on agentmods" width="80" 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 5.1 | $0.00056 | $0.01014 |
| Opus 5 | $0.00028 | $0.00507 |
| Sonnet 5 | $0.00011 | $0.00203 |
| Haiku 4.5 | $0.00006 | $0.00101 |
Grade A, and why
public-mysql-expert-base 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 10d 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 — 87 lines — stays where its author put it; the contents beside it link to each section on GitHub.
MySQL/InnoDB Knowledge Base
Use this skill to make safe, measurable MySQL/InnoDB changes.
Source: Adapted from planetscale/database-skills (MySQL skill). PlanetScale-specific content removed; only general MySQL/InnoDB knowledge retained.
Workflow
- Define workload and constraints (read/write mix, latency target, data volume, MySQL version).
- Read only the relevant reference files linked in each section below.
- Propose the smallest change that can solve the problem, including trade-offs.
- Validate with evidence (
EXPLAIN,EXPLAIN ANALYZE, lock/connection metrics). - For production changes, include rollback and post-deploy verification.
Schema Design
- Prefer narrow, monotonic PKs (
BIGINT UNSIGNED AUTO_INCREMENT) for write-heavy OLTP tables. - Avoid random UUID values as clustered PKs; if external IDs are required, keep UUID in a secondary unique column.
- Always
utf8mb4/utf8mb4_0900_ai_ci. PreferNOT NULL,DATETIMEoverTIMESTAMP. - Lookup tables over
ENUM. Normalize to 3NF; denormalize only for measured hot paths.
References:
Indexing
- Composite order: equality first, then range/sort (leftmost prefix rule).
- Range predicates stop index usage for subsequent columns.
- Secondary indexes include PK implicitly. Prefix indexes for long strings.
- Audit via
performance_schema— drop indexes withcount_read = 0.
References:
Partitioning
- Partition time-series (>50M rows) or large tables (>100M rows). Plan early — retrofit = full rebuild.
- Include partition column in every unique/PK. Always add a
MAXVALUEcatch-all.
What ships with it
23 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.
- CHANGELOG.md 1.0 KB
- README.md 154 B
- references/REFERENCE-CHARACTER-SETS.md 1.4 KB
- references/REFERENCE-COMPOSITE-INDEXES.md 1.2 KB
- references/REFERENCE-CONNECTION-MANAGEMENT.md 1.1 KB
- references/REFERENCE-COVERING-INDEXES.md 965 B
- references/REFERENCE-DATA-TYPES.md 2.0 KB
- references/REFERENCE-DEADLOCKS.md 1.2 KB
- references/REFERENCE-EXPLAIN-ANALYSIS.md 1.2 KB
- references/REFERENCE-FULLTEXT-INDEXES.md 936 B
- references/REFERENCE-INDEX-MAINTENANCE.md 1.2 KB
- references/REFERENCE-ISOLATION-LEVELS.md 1.1 KB
- references/REFERENCE-JSON-COLUMN-PATTERNS.md 1.4 KB
- references/REFERENCE-N-PLUS-ONE.md 951 B
- references/REFERENCE-ONLINE-DDL.md 1.0 KB
- references/REFERENCE-PARTITIONING.md 1.1 KB
- references/REFERENCE-PRIMARY-KEYS.md 2.7 KB
- references/REFERENCE-QUERY-OPTIMIZATION-PITFALLS.md 1.1 KB
- references/REFERENCE-README.md 1.2 KB
- references/REFERENCE-REPLICATION-LAG.md 1.0 KB
- references/REFERENCE-ROW-LOCKING-GOTCHAS.md 1.1 KB
- skill.json 1.7 KB
- USAGE.md 1.2 KB
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.
- 10d ago First seen · 87 lines · 56 tokens per session scan A 34472e01c5d8
public-mysql-expert-base is a skill published in the GitHub repository seed-forge/harness-ai-kit (22 stars, last pushed 10d ago), licensed Apache-2.0. It adds 56 tokens to every session and 1,014 once invoked, about $0.0003 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 2026-08-30.
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