postgresdb SKILL.md skillA
postgresdb from ericrisco/rsc-harness is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add ericrisco/rsc-harness/postgresdb@git:20260729.3ecb845Pins git:20260729.3ecb845 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- ericrisco/rsc-harness
- Path
skills/postgresdb/SKILL.md- Versions recorded
- 5
- Latest version
- git:20260729.3ecb845, committed Jul 29, 2026
- First version recorded
- Jun 1, 2026
- Size
- 17,670 bytes
- Repository stars
- 236
- License
- MIT
Use when PostgreSQL engine behaviour decides the answer — schema and type design, index choice, reading EXPLAIN on a slow query, zero-downtime DDL and backfills, or ops (roles, RLS, pooling, vacuum, partitioning, PITR). PG16, ORM-agnostic. NOT portable query logic (that is `sql`), NOT a managed provider's platform surface (that is `neon`).
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# PostgreSQL — schema, indexing, queries, ops Engine-level PostgreSQL 16 guidance: design correct schemas, pick the right index, read EXPLAIN and fix slow SQL, run zero-downtime migrations, and operate/secure the database. Tooling-agnostic; every example is runnable. New, non-trivial feature with no approved spec + plan under `02-DOCS/wiki/sdd/`? Hand off to [`specify`](../specify/SKILL.md) before writing feature code (method: [`sdd`](../sdd/SKILL.md)); build straight from here only for a genuinely one-line, low-risk change. Deep dives: [schema-and-indexing](references/schema-and-indexing.md) (types, constraints, every index kind, bloat) · [query-optimization](references/query-optimization.md) (EXPLAIN, joins, concurrency, JSONB/FTS/pgvector) · [migrations](references/migrations.md) (zero-downtime DDL, per-ORM) · [operations-and-security](references/operations-and-security.md) (roles, RLS, pooling, vacuum, partitioning, backups). **Not this skill.** ORM-API ergonomics (Prisma `updateMany` count trap, SQLAlchemy session lifecycle) and per-runner migration wiring → that tool's own docs; this skill owns the **SQL the ORM emits and …
Read the whole file at its exact version.
How to install
mdr add ericrisco/rsc-harness/postgresdb@sha256:658617169f2bef34The line at the top of this page pins the label git:20260729.3ecb845, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_4l7u2dh6be6bviee)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Jun 1, 2026 and Jul 29, 2026, about one every 15 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260729.3ecb845 latest | 2026-07-29 | 3ecb845 | 17,670 B | A | view · diff |
| git:20260615.5ea6bc3 | 2026-06-15 | 5ea6bc3 | 19,735 B | A | view · diff |
| git:20260610.c7292cf | 2026-06-10 | c7292cf | 19,709 B | A | view · diff |
| git:20260602.d5545f4 | 2026-06-02 | d5545f4 | 19,217 B | A | view · diff |
| git:20260601.22dbeb6 | 2026-06-01 | 22dbeb6 | 19,145 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (17670 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
ericrisco/rsc-harness · 236 stars · license MIT · pushed 2026-10-21 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_4l7u2dh6be6bviee GET https://markdownregistry.com/api/v1/resolve?ref=ericrisco/rsc-harness/postgresdb GET https://markdownregistry.com/api/v1/blob/658617169f2bef346bdd8e89d7b6bdf65b1ebdc0ac9b3d768239d7ed543ec80f
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.