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feat(guardrails): send an empty attachments list when a step has no files [AL-611] - #1939
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…iles [AL-611] evaluate_guardrail now sends "attachments": [] when the caller passes an empty list, instead of dropping the field. The Agents backend uses this to tell "files apply but there are none to inspect" apart from "files do not apply". A files-only guardrail can then pass without checking the text, while None still omits the field and keeps the text fallback for older callers. The folder-key header and the 60 second timeout are still sent only for a non-empty list, because no file is fetched when the list is empty. Bumps uipath-platform to 0.2.36 and refreshes the platform and uipath lock files. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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🟢 Approval recommended
The implementation matches the documented semantics and includes focused regression coverage.
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What changed in this PR
Updates guardrail request serialization to distinguish omitted attachments from an explicitly empty list.
Changes:
- Sends
"attachments": []when callers provide an empty list. - Preserves existing header and timeout behavior for non-empty attachments.
- Adds regression tests and bumps
uipath-platformto 0.2.36.
| File | Description |
|---|---|
packages/uipath/uv.lock |
Refreshes the platform package version. |
packages/uipath-platform/uv.lock |
Updates locked package metadata. |
packages/uipath-platform/tests/services/test_guardrails_service.py |
Tests empty-list serialization, headers, and timeout behavior. |
packages/uipath-platform/src/uipath/platform/guardrails/_guardrails_service.py |
Preserves explicitly empty attachment lists in requests. |
packages/uipath-platform/pyproject.toml |
Bumps the package version to 0.2.36. |
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valentinabojan
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Oct 12, 2026
apetraru-uipath
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Oct 13, 2026
…low-code does [AL-599] #1144 (AL-611) gave the low-code resolvers a three-way answer: None says nothing about files (text-only scope, or a payload that cannot be scanned), [] means files apply and none were found, a list names the files. With #1939 the service now sends an explicit [] on the wire, which lets a Files-only guardrail pass without a provider call. referenced_attachments and discover_attachments returned [] when the payload could not be scanned, so on a Files-scoped guardrail a broken payload would have passed without its text being judged. They now return None in that case. The decorator evaluator passes an explicit [] through when discovery found nothing, and BuiltInGuardrailValidator.run treats attachments=None as "say nothing" (bare call) and [] as "files apply, none found" (explicit [] only when the scope explicitly includes files). Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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What changed?
evaluate_guardrail(..., attachments=[])now sends"attachments": []instead of dropping the field.Nonestill omits it.[]passes without a provider call, while an absent list keeps the text fallback.uipath-langchain starts passing
[]in UiPath/uipath-langchain-python#1144 (draft, waiting for this release).How has this been tested?
test_guardrails_service.py:attachments=[]sends"attachments": [], with no folder header and the default timeout;"attachments": []and was passed without a provider call.Related (AL-611)
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