[AStaroverov]

The block warns when blocks below it use its data and that data is gone or not produced yet.

• UI (ui/src/pages/MetadataPage.vue): <PlBlockDependencies />. It reads the column links the app computes and shows nothing while every link is fine. When another block uses an output this block does not export, values this block no longer has, or data of this block before it has been run, it shows a warning naming those blocks, with advice to add the missing data or run the block; block names open the block.
• Model (model/src/args_issues.ts): the dataset and multiplexing-rule checks moved from a throw in args() to argsIssues(). args() now always builds args, so blocks below see what this block exports even while it cannot run; every issue is an error, so Run stays disabled exactly when it did before.

Depends on milaboratory/platforma#1911: PlBlockDependencies and column links exist only in that SDK, so CI passes after its release and an SDK bump here.

Confidence Score: 5/5

No unacknowledged blocking issue was found; merging still depends on the planned SDK release and bump.

Summary

Adds warnings when downstream blocks depend on missing data. Moves run checks into argsIssues() so args() can still describe the block’s outputs.

• The Samples & Data page flags missing data used by other blocks.

Important touched types:

• ArgsIssue: an SDK issue with a severity and message. Dataset checks now return these instead of throwing.
• BlockData: the saved datasets, metadata, samples, and import settings. The new blockArgsIssues() helper reads it.
• BlockArgs: the datasets, metadata, and sample labels sent to the main workflow. Its shape is unchanged; construction no longer throws for validation failures.
• DSAny: the union of supported dataset types. Its definition is unchanged; validation now returns issues for these datasets.

Verification: reviewed source and tests. Tests and UI capture were not run; dependencies are absent and the required UI component awaits the acknowledged SDK release.

Diagram

%%{init: {'theme': 'neutral'}}%%
flowchart TD
  State[Saved block data] --> Args[Build sorted arguments]
  Args --> Outputs[Describe available outputs]
  State --> Checks[Check datasets, then multiplexing rules]
  Checks --> Issues[Return errors through argsIssues]
  Issues --> Run[Keep Run disabled while errors remain]
  Links[Links computed by the desktop app] --> Warning[PlBlockDependencies shows missing-data warnings]

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_{Reviews (2) · Last reviewed commit: "MILAB-7194: gate Run with argsIssues" · Reviewed by Greptile}

[AStaroverov]

@greptileai