Libraries tagged by exactly-once

Safe request retries for Laravel APIs via the Idempotency-Key header.

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Enable WordPress actions and filter callbacks to be called exactly once.

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Exactly-once webhook processing for Laravel. Signature verification, atomic deduplication, and a durable event log for Stripe, PayPal, and any provider you add.

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Transactional outbox for Laravel: stage messages inside your database transaction and relay them reliably with retries and backoff.

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Stripe-style Idempotency-Key middleware for Laravel APIs with response replay and concurrent locks

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Consumer-side deduplication for PHP: the message key is written in the same database transaction as the change it causes, so a redelivered message is skipped. Works with outbox's CloudEvents headers, Symfony Messenger and Laravel Queue.

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Stripe-style Idempotency-Key middleware for Laravel APIs with response replay and concurrent locks

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Meters Cbox ID identity usage to a billing service — reads the shared auth.* vocabulary off the transactional outbox and reports it exactly once. Optional: install it only where you actually bill.

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The travelling salesman problem asks the following question: "Given a list of cities and the distances between each pair of cities, what is the shortest possible route that visits each city exactly once and returns to the origin city

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A Filament plugin that solves the single-record resource pattern — resources that display exactly one record per authenticated user (e.g. 'My Profile', 'My Wallet', 'My Settings') without an index page, and their arbitrarily nested child resources.

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Post-count ranks for Flarum. Members climb a ladder of groups, and hold exactly one rung at a time.

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Render Filament 5 relation managers as ordinary tabs of the record form: put RelationManagerTab::make(Manager::class) into the form's Tabs and the edit page has exactly one row of tabs — your form tabs and relation managers side by side — instead of a second row of tabs under the form. Lazy loading of the manager, collapsible sections, works on edit and view pages, no Filament view overridden.

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Integrates Grounding Pages (Standard v1.6) into Contao: one record = one entity (parent + child table), embedded as a content element, full schema.org ontology and exactly one standard-compliant JSON-LD graph per page (GEO/AEO).

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Distributed cron-style scheduler: an atomic store claim with lease heartbeats and fencing guarantees exactly one server runs each task, with first-class run history.

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With this extension you can execute exactly one defined shell command as long as only one editor is logged into backend

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