Getting it into your agent
It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.
git clone --depth 1 https://github.com/jezweb/claude-skillsnpx agentmods add skills/jezweb/claude-skills/db-seedWrote 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/jezweb/claude-skills/db-seed)<a href="https://agentmods.dev/skills/jezweb/claude-skills/db-seed"><img src="https://agentmods.dev/badge/skills/jezweb/claude-skills/db-seed/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/jezweb/claude-skills/db-seed"><img src="https://agentmods.dev/badge/skills/jezweb/claude-skills/db-seed.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Socket pass
- Snyk pass
- NVIDIA SkillSpector warn
SkillSpector: 2 findings, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium MCP Rug Pull · line 151 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
- medium MCP Rug Pull · line 166 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
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 | $0.00096 | $0.01966 |
| Opus 5 | $0.00048 | $0.00983 |
| Sonnet 5 | $0.00019 | $0.00393 |
| Haiku 4.5 | $0.00010 | $0.00197 |
Grade A, and why
db-seed 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 — 221 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Database Seed Generator
Generate seed scripts that populate databases with realistic, domain-appropriate sample data. Reads your schema and produces ready-to-run seed files.
Workflow
1. Find the Schema
Scan the project for schema definitions:
| Source | Location pattern |
|---|---|
| Drizzle schema | src/db/schema.ts, src/schema/*.ts, db/schema.ts |
| D1 migrations | drizzle/*.sql, migrations/*.sql |
| Raw SQL | schema.sql, db/*.sql |
| Prisma | prisma/schema.prisma |
Read all schema files. Build a mental model of:
- Tables and their columns
- Data types and constraints (NOT NULL, UNIQUE, DEFAULT)
- Foreign key relationships (which tables reference which)
- JSON fields stored as TEXT (common in D1/SQLite)
2. Determine Seed Parameters
Ask the user:
| Parameter | Options | Default |
|---|---|---|
| Purpose | dev, demo, testing | dev |
| Volume | small (5-10 rows/table), medium (20-50), large (100+) | small |
| Domain context | "e-commerce store", "SaaS app", "blog", etc. | Infer from schema |
| Output format | TypeScript (Drizzle), raw SQL, or both | Match project's ORM |
Purpose affects data quality:
- dev: Varied data, some edge cases (empty fields, long strings, unicode)
- demo: Polished data that looks good in screenshots and presentations
- testing: Systematic data covering boundary conditions, duplicates, special characters
3. Plan Insert Order
Build a dependency graph from foreign keys. Insert parent tables before children.
Example order for a blog schema:
1. users (no dependencies)
2. categories (no dependencies)
3. posts (depends on users, categories)
4. comments (depends on users, posts)
5. tags (no dependencies)
6. post_tags (depends on posts, tags)
Circular dependencies: If table A references B and B references A, use nullable foreign keys and insert in two passes (insert with NULL, then UPDATE).
4. Generate Realistic Data
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 · 221 lines · 96 tokens per session scan A aac1cee67f24
db-seed is a skill published in the GitHub repository jezweb/claude-skills (1,000 stars, last pushed 2mo ago), licensed MIT. It adds 96 tokens to every session and 1,966 once invoked, about $0.0005 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.
Other skills, from other repositories
ecto-patterns
Ecto patterns — schemas, changesets, queries, migrations, Multi, associations, preloads, upserts. Use when editing Repo calls, Ecto.Query, or schema fields. Skip for Ash.
phoenix-contexts
Phoenix context design — creating/splitting contexts, Scope (1.8+), Ecto.Multi, PubSub, routers, plugs, controllers. Use when editing contexts, routers, or designing boundaries.
ecto-n1-check
Detect N+1 query anti-patterns specifically — Repo calls inside Enum/for loops, missing preloads on associations. Use when N+1 is explicitly suspected, NOT for unrelated Ecto questions or wider database performance.
sql-query-builder
Build SQL queries for construction databases. Generate optimized SQL queries for construction data retrieval.
cwicr-data-loader
Load and parse DDC CWICR construction cost database from multiple formats: Parquet, Excel, CSV, Qdrant snapshots. Foundation for all CWICR operations.
data-model-designer
Design data models for construction projects. Create entity-relationship diagrams, define schemas, and generate database structures.