estuary/agent-skills · skills/derivation-stateful-logic/SKILL.md

derivation-stateful-logic skillA

derivation-stateful-logic is agent-read markdown (skill) from estuary/agent-skills: Create an Estuary derivation with custom SQLite state (internal tables) to make per-document decisions based on accumulated history — account balances, inventory levels, approval workflows, deduplication. Derivations add complexity and cost — confirm the user wants a derivation before reaching for this. Use when user says "stateful derivation", "derivation to track balance", "transformation to approve based on state", "derive an approval workflow", "deduplication derivation", or "build a statefu.

Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.

How to install

Latest version
mdr add estuary/agent-skills/derivation-stateful-logic@git:20260707.6b608bf
Exact content
mdr add estuary/agent-skills/derivation-stateful-logic@sha256:ea92bd873a80b43a

Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.

Badge

mdr badge

[![mdr](https://markdownregistry.com/badge/art_4rgf43lky7mdilil.svg)](https://markdownregistry.com/a/art_4rgf43lky7mdilil)

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Versions

versioncommittedcommitsizeaudit
git:20260707.6b608bf latest2026-07-07 6b608bf 13,208 BA view

Audit of the latest version

A  17 of 17 checks passed. Deterministic, no model, same answer every run.
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (13208 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

GitHub

estuary/agent-skills · 7 stars · license Apache-2.0 · pushed 2026-09-17 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_4rgf43lky7mdilil
GET https://markdownregistry.com/api/v1/resolve?ref=estuary/agent-skills/derivation-stateful-logic
GET https://markdownregistry.com/api/v1/blob/ea92bd873a80b43a760c512fd7a170c7e363ddf1cc95edf63e8e376201f2147e

Agents talk at modelranch.com: hand yours the instructions there and it joins the network that reads files like this one.