[waleedlatif1]

Summary

• validateRunFromBlock now returns a structured refusal (block_not_found, inside_subflow, upstream_not_executed), carried on RunFromBlockValidationError; class, error codes and message prefixes the canvas matches on are unchanged
• Executor messages name blocks instead of bare ids (Upstream dependency not executed: Fetch, Cannot run from block inside loop: Each row. Run the loop or the whole workflow instead.)
• Copilot run_from_block / run_block rewrite the refusal for the agent from the loaded workflow state:
  • upstream not run: names both blocks and the source execution, points at run_workflow_until_block (stopAfterBlockId) or an executionId that ran the upstream block
  • inside loop/parallel: names the container, points at starting from it or run_workflow
  • unknown id: says it is not in the draft/deployed workflow and lists its blocks (first 20, then "and N more"); a known but disabled block says it is disabled
• No behavior change: nothing extra runs, run_block still runs one approved block

Type of Change

• Improvement

Testing

• executor/utils/run-from-block.test.ts, executor/execution/executor.test.ts, lib/workflows/application/run-workflow-from-copilot.test.ts (59 passing); the 6 new/changed assertions fail on the pre-fix code
• biome on changed files, check:comment-hygiene; type-check and remaining audits left to CI

Checklist

• Code follows project style guidelines
• Self-reviewed my changes
• Tests added/updated and passing (new tests pass the test-audit authoring gate)
• No new warnings introduced
• I confirm that I have read and agree to the terms outlined in the Contributor License Agreement (CLA)

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1 Skipped Deployment

Project	Deployment	Actions	Updated
docs	Ignored	Preview	Nov 3, 2026 9:15pm UTC

[greptile-apps]

Confidence Score: 5/5

[Low impact] The PR appears safe to merge, with no outstanding findings.

Summary

The PR gives refused block runs clearer messages and next steps.

• Run-from-block refusals identify the block and the reason it cannot start.
• Copilot explains how to recover from a refused block run.

_{Reviews (3) · Last reviewed commit: "chore(executor): type subflow configs in..." · Reviewed by Greptile}

[cubic-dev-ai]

All reported issues were addressed across 5 files

<sub>Reply with feedback, questions, or to request a fix.

Turn on auto-fix | Re-trigger cubic</sub>

[waleedlatif1]

@greptile

[waleedlatif1]

@cubic-dev-ai review this PR

[cubic-dev-ai]

@cubic-dev-ai review this PR

@waleedlatif1 I have started the AI code review. It will take a few minutes to complete.

[cubic-dev-ai]

No issues found across 6 files

Confidence score: 5/5

• Automated review surfaced no issues in the provided summaries.
• No files require special attention.

_{Turn on auto-fix | Re-trigger cubic}

[waleedlatif1]

@greptile

[waleedlatif1]

@cubic-dev-ai review this PR

[cubic-dev-ai]

@cubic-dev-ai review this PR

@waleedlatif1 I have started the AI code review. It will take a few minutes to complete.

[cubic-dev-ai]

No issues found across 6 files

Confidence score: 5/5

• Automated review surfaced no issues in the provided summaries.
• No files require special attention.

_{Turn on auto-fix | Re-trigger cubic}