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 ComeOnOliver/skillshub --skill axiom-grdbgit clone --depth 1 https://github.com/ComeOnOliver/skillshubWrote 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/comeonoliver/skillshub/axiom-grdb)<a href="https://agentmods.dev/skills/comeonoliver/skillshub/axiom-grdb"><img src="https://agentmods.dev/badge/skills/comeonoliver/skillshub/axiom-grdb/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/comeonoliver/skillshub/axiom-grdb"><img src="https://agentmods.dev/badge/skills/comeonoliver/skillshub/axiom-grdb.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 | $0.00052 | $0.04182 |
| Opus 5 | $0.00026 | $0.02091 |
| Sonnet 5 | $0.00010 | $0.00836 |
| Haiku 4.5 | $0.00005 | $0.00418 |
Grade A, and why
axiom-grdb 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.
How it starts
The opening of the file, as written. The whole thing — 679 lines — stays where its author put it; the contents beside it link to each section on GitHub.
GRDB
Overview
Direct SQLite access using GRDB.swift — a toolkit for SQLite databases with type-safe queries, migrations, and reactive observation.
Core principle Type-safe Swift wrapper around raw SQL with full SQLite power when you need it.
Requires iOS 13+, Swift 5.7+ License MIT (free and open source)
When to Use GRDB
Use raw GRDB when you need
- ✅ Complex SQL joins across 4+ tables
- ✅ Window functions (ROW_NUMBER, RANK, LAG/LEAD)
- ✅ Reactive queries with ValueObservation
- ✅ Full control over SQL for performance
- ✅ Advanced migration logic beyond schema changes
Note: SQLiteData now supports GROUP BY (.group(by:)) and HAVING (.having()) via the query builder — see the axiom-sqlitedata-ref skill.
Use SQLiteData instead when
- Type-safe
@Tablemodels are sufficient - CloudKit sync needed
- Prefer declarative queries over SQL
Use SwiftData when
- Simple CRUD with native Apple integration
- Don't need raw SQL control
For migrations See the axiom-database-migration skill for safe schema evolution patterns.
Example Prompts
These are real questions developers ask that this skill is designed to answer:
1. "I need to query messages with their authors and count of reactions in one query. How do I write the JOIN?"
→ The skill shows complex JOIN queries with multiple tables and aggregations
2. "I want to observe a filtered list and update the UI whenever notes with a specific tag change."
→ The skill covers ValueObservation patterns for reactive query updates
3. "I'm importing thousands of chat records and need custom migration logic. How do I use DatabaseMigrator?"
→ The skill explains migration registration, data transforms, and safe rollback patterns
4. "My query is slow (takes 10+ seconds). How do I profile and optimize it?"
→ The skill covers EXPLAIN QUERY PLAN, database.trace for profiling, and index creation
5. "I need to fetch tasks grouped by due date with completion counts, ordered by priority. Raw SQL seems easier than type-safe queries."
→ The skill demonstrates when GRDB's raw SQL is clearer than type-safe wrappers
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 · 679 lines · 52 tokens per session scan A 0a3c0c182af9
axiom-grdb is a skill published in the GitHub repository ComeOnOliver/skillshub (63 stars, last pushed 2mo ago), licensed MIT. It adds 52 tokens to every session and 4,182 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 2026-09-03.
Other skills, from other repositories
swift-actor-persistence
Thread-safe data persistence in Swift using actors — in-memory cache with file-backed storage, eliminating data races by design.
backend-patterns
Backend architecture patterns, API design, database optimization, and server-side best practices for Node.js, Express, and Next.js API routes. Use when building or reviewing Node.js, Express, or Next.js API routes and their data access.
database-migrations
Database migration best practices for schema changes, data migrations, rollbacks, and zero-downtime deployments across PostgreSQL, MySQL, and common ORMs (Prisma, Drizzle, Django, TypeORM, golang-migrate). Use when planning or implementing database schema changes.
swift-protocol-di-testing
Protocol-based dependency injection for testable Swift code — mock file system, network, and external APIs using focused protocols and Swift Testing.
jpa-patterns
JPA/Hibernate patterns for entity design, relationships, query optimization, transactions, auditing, indexing, pagination, and pooling in Spring Boot.
postgres-patterns
PostgreSQL database patterns for query optimization, schema design, indexing, and security. Quick reference for common patterns, index types, data types, and anti-pattern detection. Based on Supabase best practices.