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 jnPiyush/AgentX --skill postgresqlgit clone --depth 1 https://github.com/jnPiyush/AgentXWrote 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/jnpiyush/agentx/postgresql)<a href="https://agentmods.dev/skills/jnpiyush/agentx/postgresql"><img src="https://agentmods.dev/badge/skills/jnpiyush/agentx/postgresql/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/jnpiyush/agentx/postgresql"><img src="https://agentmods.dev/badge/skills/jnpiyush/agentx/postgresql.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- 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 | $0.00050 | $0.01274 |
| Opus 5 | $0.00025 | $0.00637 |
| Sonnet 5 | $0.00010 | $0.00255 |
| Haiku 4.5 | $0.00005 | $0.00127 |
Grade A, and why
postgresql 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 5d 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 — 126 lines — stays where its author put it; the contents beside it link to each section on GitHub.
PostgreSQL Database Development
Purpose: Production-ready PostgreSQL development for high-performance, scalable applications. Audience: Backend engineers and database administrators working with PostgreSQL. Standard: Follows github/awesome-copilot PostgreSQL patterns.
When to Use This Skill
- Writing PostgreSQL queries with JSONB or array operations
- Implementing full-text search in PostgreSQL
- Optimizing PostgreSQL query performance with indexes
- Using window functions and CTEs
- Configuring row-level security (RLS)
Decision Tree
PostgreSQL Decision
+-- Need semi-structured data?
| +-- Dynamic schema? -> JSONB columns with GIN index
| +-- Fixed schema? -> Regular columns with B-tree indexes
+-- Need full-text search?
| +-- Simple keyword match? -> ILIKE or trigram (pg_trgm)
| +-- Ranked relevance? -> tsvector + GIN index
+-- Pagination needed?
| +-- Small dataset (<10K rows)? -> LIMIT/OFFSET acceptable
| +-- Large dataset? -> Cursor-based (keyset) pagination
+-- Multi-tenant data?
| +-- Row isolation? -> Row-Level Security (RLS) policies
| +-- Schema isolation? -> Separate schemas per tenant
+-- Aggregation heavy? -> Materialized views with periodic refresh
Prerequisites
- PostgreSQL 14+ installed or accessible
- psql or pgAdmin client
Quick Reference
| Need | Solution | Pattern |
|---|---|---|
| JSONB query | Containment operator | WHERE data @> '{"status": "active"}'::jsonb |
| Array operations | ANY operator | WHERE id = ANY(ARRAY[1,2,3]) |
| Full-text search | GIN index + tsvector | CREATE INDEX ON posts USING gin(to_tsvector('english', content)) |
| Window functions | ROW_NUMBER, RANK | ROW_NUMBER() OVER (PARTITION BY category ORDER BY created_at DESC) |
| Upsert | INSERT ... ON CONFLICT | ON CONFLICT (id) DO UPDATE SET ... |
| JSON aggregation | jsonb_agg | SELECT jsonb_agg(row_to_json(t)) FROM ... |
What ships with it
3 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.
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.
- 5d ago First seen · 126 lines · 50 tokens per session scan A 4c34e009d4a0
postgresql is a skill published in the GitHub repository jnPiyush/AgentX (15 stars, last pushed yesterday), licensed Apache-2.0. It adds 50 tokens to every session and 1,274 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.
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