pg-aiguide is a knowledge and tooling project that gives AI coding assistants version-aware PostgreSQL documentation and curated database practices. Developers use it through agent skills, an MCP server, or a Claude Code plugin to help coding tools generate better PostgreSQL code. The catalogue entries are its skills, instructions, MCP integration, and rule.
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 timescale/pg-aiguide --skill postgresgit clone --depth 1 https://github.com/timescale/pg-aiguideWrote 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/timescale/pg-aiguide/postgres)<a href="https://agentmods.dev/skills/timescale/pg-aiguide/postgres"><img src="https://agentmods.dev/badge/skills/timescale/pg-aiguide/postgres/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/timescale/pg-aiguide/postgres"><img src="https://agentmods.dev/badge/skills/timescale/pg-aiguide/postgres.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Socket pass
- Snyk pass
- 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 | $0.00211 | $0.00829 |
| Opus 5.5 | $0.00084 | $0.00332 |
| Sonnet 5.5 | $0.00042 | $0.00166 |
| Haiku 4.5 | $0.00021 | $0.00083 |
Grade A, and why
postgres 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 28d 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 — 53 lines — stays where its author put it; the contents beside it link to each section on GitHub.
PostgreSQL Expert Skills
This skill provides comprehensive PostgreSQL expertise through specialized references. Load the appropriate reference based on the task.
Available References
Existing Databases
- schema-exploration — Read-only, question-driven exploration of schemas, tables, views, routines, triggers, RLS, and extensions using
pg_catalog. Use to understand an existing database before designing changes or writing queries.
Table Design
- design-postgres-tables — Data types, constraints, indexes, JSONB patterns, partitioning, and PostgreSQL best practices. Use for any general table/schema design task.
- design-postgis-tables — PostGIS spatial table design: geometry vs geography types, SRIDs, spatial indexing, and location-based query patterns. Use when the task involves geographic or spatial data.
Search
- pgvector-semantic-search — Vector similarity search with pgvector: HNSW/IVFFlat indexes, halfvec storage, quantization, filtered search, and tuning. Use for embeddings, RAG, or semantic search.
- postgres-hybrid-text-search — Hybrid search combining BM25 keyword search with pgvector semantic search using RRF. Use when combining keyword and meaning-based search.
TimescaleDB
- setup-timescaledb-hypertables — Hypertable creation, compression, retention policies, continuous aggregates, and indexes. Use when setting up TimescaleDB from scratch.
- find-hypertable-candidates — SQL queries to analyze existing tables and score them for hypertable conversion. Use when evaluating which tables to migrate.
- migrate-postgres-tables-to-hypertables — Step-by-step migration: partition column selection, in-place vs blue-green, validation. Use when executing a migration.
What ships with it
13 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.
- references/backfill-strategies.md 67 B
- references/complete-example.md 64 B
- references/design-postgis-tables.md 36 B
- references/design-postgres-tables.md 37 B
- references/find-hypertable-candidates.md 41 B
- references/migrate-postgres-tables-to-hypertables.md 53 B
- references/pgvector-semantic-search.md 39 B
- references/postgres-database-migration.md 42 B
- references/postgres-hybrid-text-search.md 42 B
- references/schema-exploration/guide.md 36 B
- references/schema-exploration/references 38 B
- references/setup-timescaledb-hypertables.md 44 B
- references/validation-queries.md 66 B
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.
- 28d ago Changed · +4 lines · +14 tokens per session 6855e5cb7628
- 1mo ago Changed · -4 lines · -13 tokens per session dec9bfef0591
- 1mo ago First seen · 53 lines · 210 tokens per session scan A 475d8725ed18
postgres is a skill published in the GitHub repository timescale/pg-aiguide (1,872 stars, last pushed 2d ago), licensed Apache-2.0. It adds 211 tokens to every session and 829 once invoked, about $0.0008 per session on Opus 5.5. 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
database-optimizer
Optimizes database queries and improves performance across PostgreSQL and MySQL systems. Use when investigating slow queries, analyzing execution plans, or optimizing database performance. Invoke for index design, query rewrites, configuration tuning, partitioning strategies, lock contention resolution.
postgres-pro
Use when optimizing PostgreSQL queries, configuring replication, or implementing advanced database features. Invoke for EXPLAIN analysis, JSONB operations, extension usage, VACUUM tuning, performance monitoring.
kysely
Guidelines for developing with Kysely, a type-safe TypeScript SQL query builder with autocompletion support.
postgresql-best-practices
PostgreSQL development best practices for schema design, query optimization, and database administration.
pdlc-db-migrate
A database migration manager driven by database design documents. A migration is a versioned script that changes a database structure and can also undo that change.
pdlc-db-design
A database design workflow that turns an existing product requirements document and, when available, API design into a database plan. It describes entities, fields, links, indexes, constraints, and an entity-relationship diagram, which shows how data types connect.