transactional-outbox SKILL.md skillA
transactional-outbox from amey-thakur/ai-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add amey-thakur/ai-skills/transactional-outbox@git:20260720.1dc980ePins git:20260720.1dc980e in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- amey-thakur/ai-skills
- Path
skills/backend/transactional-outbox/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260720.1dc980e, committed Jul 20, 2026
- Size
- 2,587 bytes
- Repository stars
- 14
- License
- MIT
Publish events reliably by writing them in the same transaction as state changes and relaying asynchronously. Use when a service must update its database and emit a message without losing either.
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
# Transactional outbox Writing the database and publishing to a broker are two systems; there is no transaction across them. The outbox makes the event part of the database write, then moves it to the broker afterward, turning dual-write data loss into at-least-once delivery. ## Method 1. **Recognize the dual-write.** Any handler that commits state and then publishes (or publishes and then commits) loses one side on a crash between them. If both "order saved" and "order-created event" must survive, you need the outbox (or its cousin, CDC). 2. **Write the event with the state, atomically.** `outbox(id, aggregate_id, type, payload, created_at, published_at NULL)` inserted in the same transaction as the business change. The commit is now the single point of truth: both happened or neither. 3. **Relay with a poller or CDC.** Poller: select unpublished in created_at order (SKIP LOCKED for competing relays), publish, mark published; simple, adds polling latency. CDC (Debezium-style, reading the WAL): lower latency and no polling load, one more moving system to operate. Start with the poller unless you already run CDC. …
Read the whole file at its exact version.
How to install
mdr add amey-thakur/ai-skills/transactional-outbox@sha256:1a38850ed811f932The line at the top of this page pins the label git:20260720.1dc980e, 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_pg7ighnxuh72jyrn)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Jul 20, 2026.
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 (2587 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
amey-thakur/ai-skills · 14 stars · license MIT · pushed 2026-09-06 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_pg7ighnxuh72jyrn GET https://markdownregistry.com/api/v1/resolve?ref=amey-thakur/ai-skills/transactional-outbox GET https://markdownregistry.com/api/v1/blob/1a38850ed811f932bb66b050aa3874aee4a1664718f39bfea8d3c77b4dc0b80a
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.