principle-make-operations-idempotent SKILL.md skillA

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principle-make-operations-idempotent from j-star-films-studios/vibecode-protocol-suite is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

mdr add j-star-films-studios/vibecode-protocol-suite/principle-make-operations-idempotent@git:20260821.1b830a3

Pins git:20260821.1b830a3 in mdr.lock. Pin the fingerprint instead.

Audit grade

A, 17 of 17 checks passed

Kind

SKILL.md skill

Repository

j-star-films-studios/vibecode-protocol-suite

Path

assets/.agent/skills/engineering-principles/make-operations-idempotent/SKILL.md

Versions recorded

1

Latest version

git:20260821.1b830a3, committed Aug 21, 2026

Size

1,390 bytes

Repository stars

26

License

ISC

Apply when designing commands, lifecycle steps, or processing loops that run amid crashes, restarts, and retries. Converge to the same end state regardless of partial prior runs.

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

# Make Operations Idempotent

Design operations so they converge to the correct state regardless of how many times they run or where they start from. Every state-mutating operation should answer: "What happens if this runs twice? What happens if the previous run crashed halfway?"

**Why:** Commands, lifecycle operations, and processing loops run where crashes, restarts, and retries are normal. If partial state changes the next run's outcome, every restart becomes a debugging session.

**The pattern:**
- Convergent startup: scan for existing state, clean stale artifacts, adopt live sessions
- Content-based cleanup: compare by content equivalence, not creation order
- Self-healing locks: use PID-based stale lock detection
- Idempotent scheduling: failed work respawns cleanly, fresh input regenerated after each cycle

**The test:**
1. What happens if this runs twice in a row?
2. What happens if the previous run crashed at every possible point?
3. Does re-execution converge to the same end state?

If any answer is "it depends on what state was left behind," the operation needs a reconciliation step.

Read the whole file at its exact version.

How to install

mdr add j-star-films-studios/vibecode-protocol-suite/principle-make-operations-idempotent@sha256:540738217c3da7bf

[![mdr](https://markdownregistry.com/badge/art_5wionoauhudrspqo.svg)](https://markdownregistry.com/a/art_5wionoauhudrspqo)

Versions

The registry has recorded 1 version of this file, committed on Aug 21, 2026.

Audit of the latest version

Source

API

GET https://markdownregistry.com/api/v1/artifacts/art_5wionoauhudrspqo
GET https://markdownregistry.com/api/v1/resolve?ref=j-star-films-studios/vibecode-protocol-suite/principle-make-operations-idempotent
GET https://markdownregistry.com/api/v1/blob/540738217c3da7bf513b9886924ad6a2bc77e58be867f5bd2e1831c74bf2ce70

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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.

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