All 94 skillsWeb and data13 of 17
stryx:databases
When working on a server database such as PostgreSQL: slow queries, schema changes, backups.
/stryx:databasesInside its piece: 14 specks, one for each file on its shelf. Its sixteen group-mates glow on the open book behind it. The light splits toward teal, the band of Web and data.
In numbers
counted 2026-10-12 in the installed set- 12reference files
- 14files in the skill
- 135KB on disk
- 4chapters
- 1agent works by this book
Use it when
in the skill’s own wordsWhen working on a server database
- PostgreSQL first
- also MySQL
- SQL Server
- MongoDB
- Cosmos DB or Redis
- A slow query, or reading EXPLAIN or an execution plan to pick an index
- Designing or changing a schema (types, keys, constraints, JSONB, row level security)
- A migration on a live or large table (CREATE INDEX CONCURRENTLY, NOT VALID, backfill, ALGORITHM=INSTANT)
- Isolation levels, lost updates, double bookings, a known deadlock or "current transaction is aborted"
- Reviewing SQL or a migration, or tracing what uses a table or column
- ORM migrations and N+1 (Prisma, Drizzle, Alembic, Django, EF Core)
- Backups and restore tests
- Oracle to PostgreSQL ports
- A job that turns out to be SQLite or sql.js (the stryx:database-expert agent)
Not for
another skill does it- Vector search or embeddings→ stryx:rag
- A slow app whose slow layer is unknown→ stryx:performance
- A slowdown that regressed or a failure of unknown cause→ stryx:debug
- Injection or encryption audits→ stryx:security
- Python around an ORM→ stryx:python
On its shelf
14 files, 135 KB- references/12
- SKILL.md1
- evals/1
Inside the book
4 chapters, by title only- Core procedure
- Report shape
- Verification: what a pass looks like
- Quick reference: the facts that are easy to get wrong
Its helper
1 agent works by this book- stryx:database-expertWhen SQLite or sql.js work is needed: schema, migrations, indexes, slow queries, backups.
Works with
the skills it names most- stryx:debug→Something is broken: a bug, an error, a crash, a failing test or wrong data.
- stryx:performance→Something is slow, laggy, too big or uses too much memory.
- stryx:ai-power→When you are not sure which skill fits, or you say "load aipower": it is the map of all skills.
- stryx:architect→When the hard part is structure: how the parts of a system fit, and the trade-offs between designs.
- stryx:python→When writing or fixing Python 3.11 or newer: types, async code, packaging, pytest.
- stryx:rag→When an app must search its own documents and answer from them.
Claude loads it by itself when the moment comes; by hand, type the line at the top. It comes with the whole set: Installs all 94 skills, 32 agents and the brain program as one set. The skill’s own text is private source and is not shown here.