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2b5550c346
Lead with a complete plugin quick start and add task-oriented usage, troubleshooting, customization, and contribution guides. Preserve the broader plugin framing, correct conflicting contract guidance, support Agents folder reviews, and align repository validation. Convert existing sample references to clickable links without changing knowledge rules. Co-authored-by: Jesper Schulz-Wedde <jesper.schulzwedde@microsoft.com> Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>
26 lines
1.7 KiB
Markdown
26 lines
1.7 KiB
Markdown
---
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bc-version: [all]
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domain: events
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keywords: [event-attribute, includesender, globalvaraccess, isolated-event, compatibility, integration-event, business-event, appsourcecop, as0021, as0101]
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technologies: [al]
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countries: [w1]
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application-area: [all]
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---
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# Do not change shipped event attribute flags
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## Description
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`IncludeSender` and, on Integration events, `GlobalVarAccess` have been event-contract flags since runtime 1.0. Removing sender or global access breaks subscribers, so AppSourceCop AS0021 prevents changing those flags from `true` to `false`. On runtime 9.0 and later (Business Central 2022 release wave 1, BC20), `Isolated` also controls transaction, error, and rollback behavior; AS0101 prevents adding, removing, or changing that argument.
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## Best Practice
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Keep every available attribute argument exactly as shipped. If new subscribers need different sender/global exposure, publish a new event with the desired flags. Apply the same rule to `Isolated` only on BC20 or later, where that argument exists. Raise both events while the original contract is supported, and choose preferred flags only when designing a new event.
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See sample: [`do-not-change-shipped-event-attribute-flags.good.al`](do-not-change-shipped-event-attribute-flags.good.al).
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## Anti Pattern
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Changing a shipped event's `IncludeSender` or `GlobalVarAccess` to modernize its design, including replacing `IncludeSender` with an explicit parameter. On BC20 or later, adding, removing, or toggling `Isolated` is equally contract-significant. Even a change that leaves old subscribers compiling can alter observable execution or exposure; version the event instead.
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See sample: [`do-not-change-shipped-event-attribute-flags.bad.al`](do-not-change-shipped-event-attribute-flags.bad.al).
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