bcquality/community/knowledge/agents/set-instructions-as-secrettext.md
Stefano Demiliani 2d0913568e feat(community/agents): add AL agent quality guidance
- add 20 agent knowledge rules with good and bad AL samples
- clarify setup dialog shape, temporary persistence, permissions, profiles, instructions, capability registration, and interface wiring
- add the community-owned AL agents review skill
- make review fixture discovery layer-aware with custom, community, and Microsoft precedence
- document layer-aware evaluation behavior
2026-08-23 22:10:10 +02:00

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---
bc-version: [27..]
domain: agents
keywords: [setinstructions, secrettext, instructions, per-instance, resource]
technologies: [al]
countries: [w1]
application-area: [all]
---
# Set agent instructions as SecretText on the instance
## Description
Instructions are instance data, not an enum caption. `Agent.SetInstructions` takes `SecretText` so the payload is not logged or copied as ordinary text. A Label or plaintext Text on the agent type is the wrong store: it leaks into telemetry-friendly strings and cannot vary per instance or company.
## Best Practice
Load instruction text from a resource or builder into a `SecretText` variable and call `Agent.SetInstructions(AgentUserSecurityId, Instructions)` after `Create`. Keep one instruction document per instance.
See sample: `set-instructions-as-secrettext.good.al`.
## Anti Pattern
Passing a `Label` or `Text` to `SetInstructions`, storing instructions in a setup Text field without wrapping as `SecretText`, or putting the prompt only in a code comment. Detection signal: `SetInstructions` with a non-`SecretText` argument, or no `SetInstructions` after `Create`.
See sample: `set-instructions-as-secrettext.bad.al`.