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Add 15 community knowledge articles from BC Code Intel ingest (#66)
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* Add 15 community knowledge articles from BC Code Intel ingest

Ingests net-new /community knowledge from BC Code Intelligence, surviving
the admission test, gray-zone salvage, and dedup against the full corpus.

Domains: ui (6), error-handling (3), performance (2), upgrade (1),
appsource (1), security (1), telemetry (1). The two BC24 No. Series
migration drafts are merged into one article.

Adds good/bad AL samples for the clean-fit articles (error-handling,
performance, security, telemetry). UI and appsource remain knowledge-only.

Validator and knowledge-index checks pass (207 articles).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

* Correct SetLoadFields JIT-load article to match MS docs

The draft claimed accessing an unlisted field "reloads the entire row"
per record. Microsoft's partial-records docs say otherwise: the platform
does an implicit Get that loads the missing field(s), and in a direct var
loop the first JIT updates the enumerator so later iterations do not
re-load. The genuine per-row penalty is the pass-by-value case, where the
copy's enumerator is not updated.

Rewrite the article around JIT loading and the by-value footgun, rename
the slug from ...full-reload to ...jit-load, and fix the good/bad samples
to demonstrate the by-value repetition accurately.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

---------

Co-authored-by: Jeremy Vyska <jeremy@sparebrained.com>
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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community/knowledge/telemetry/default-telemetryscope-to-extensionpublisher.md Normal file
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---
bc-version: [all]
domain: telemetry
keywords: [telemetry, session-logmessage, telemetryscope, application-insights, extensionpublisher, ingestion-cost]
technologies: [al]
countries: [w1]
application-area: [all]
---
# Default TelemetryScope to ExtensionPublisher, not All
> Contributions welcome — open a PR to refine or extend this article.
## Description
The `TelemetryScope` parameter of `Session.LogMessage` (and `LogError`) controls *where* a custom telemetry signal is routed, not just whether it is emitted. `TelemetryScope::ExtensionPublisher` sends the signal only to the extension publisher's own Application Insights resource. `TelemetryScope::All` sends it to **both** the publisher's resource **and** the customer's environment-level Application Insights resource. The distinction is easy to get wrong because both values compile and both "emit telemetry" — but `All` silently adds to the customer's ingestion volume and cost.
## Best Practice
Default to `TelemetryScope::ExtensionPublisher` for diagnostic telemetry that only the publisher acts on. Reserve `TelemetryScope::All` for signals the customer's own administrators are expected to monitor and act on (for example, a business event surfaced to their environment telemetry). Treat the choice as a deliberate routing decision per signal, not a copy-paste default.
## Anti Pattern
Emitting all custom telemetry with `TelemetryScope::All` "to be safe." This pushes the publisher's internal diagnostics into every customer's Application Insights, inflating their ingestion cost and burying their own signals in noise — a footgun a code reviewer can catch by flagging `All` on any signal the customer would not act on.