distributed-write-atomicity SKILL.md skillA
distributed-write-atomicity from annatchijova/skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add annatchijova/skills/distributed-write-atomicity@git:20260923.77be367Pins git:20260923.77be367 in mdr.lock. Pin the fingerprint instead.
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- Kind
- SKILL.md skill
- Repository
- annatchijova/skills
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distributed-write-atomicity/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260923.77be367, committed Sep 23, 2026
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- 9
- License
- a license file GitHub does not identify
Design the intermediate state, redelivery, and deduplication explicitly whenever two effects cannot share one transaction — a DB write plus an event/webhook/second-service call, a payment plus a notification, a state change plus a cache invalidation. Use whenever an operation must affect two systems that don't share a transactional authority. Trigger on "dual write", "outbox pattern", "idempotency key", "exactly-once", "duplicate event", "webhook delivery", "the payment charged twice…
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
# Distributed Write Atomicity
`atomic-state-mutation` answers: given one transactional authority, how do
several writes commit or roll back together? This skill answers the
question one level up, where that mechanism stops applying:
```
atomic-state-mutation
└── one transactional authority
DB write A + DB write B
→ COMMIT / ROLLBACK
distributed-write-atomicity
└── distinct transactional authorities
DB write + message/event/webhook/service B
→ no shared COMMIT exists
```
The central rule, and the reason this is a distinct discipline rather than a
harder version of the first one:
> **If two effects cannot participate in the same transaction, do not
> assert distributed atomicity. Design the intermediate state, the
> redelivery, and the deduplication explicitly — atomicity across
> independent authorities is not a stronger transaction, it's a different
> problem with a different shape of solution.**
Composes with the library:
- **atomic-state-mutation** — the outbox pattern below reduces this
problem back into that skill's territory for the write that *can* be
transactional; the two are sequential steps of the same design, not
…Read the whole file at its exact version.
How to install
mdr add annatchijova/skills/distributed-write-atomicity@sha256:7892c0905cd3337fThe line at the top of this page pins the label git:20260923.77be367, 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_2vowoo5k73tpzdyq)
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Versions
The registry has recorded 1 version of this file, committed on Sep 23, 2026.
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Source
annatchijova/skills · 9 stars · license a license file GitHub does not identify · pushed 2026-11-02 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_2vowoo5k73tpzdyq GET https://markdownregistry.com/api/v1/resolve?ref=annatchijova/skills/distributed-write-atomicity GET https://markdownregistry.com/api/v1/blob/7892c0905cd3337f64225d11442a74584a2f25df916ecf2fa759a23bbf32549e
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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.