feat(copilot): let Run agent cancel workflow runs

[j15z]

Summary

• let the Run agent cancel workflow executions using workflow and execution IDs
• use the same internal cancellation route as the logs UI

Type of Change

• New feature

Testing

• bun run lint
• bun run apps/sim/scripts/check-block-registry.ts origin/staging
• bun run check:audits
• targeted Copilot adapter, router, tool display, and cancellation route tests

Checklist

• Code follows project style guidelines
• Self-reviewed my changes
• Tests added/updated and passing
• 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 (UTC)
docs	Skipped		Aug 27, 2026 5:35am

[greptile-apps]

Greptile Summary

The PR adds a Copilot tool for cancelling workflow runs and extracts cancellation behavior into a shared implementation used by both Copilot and the HTTP route.

• Registers and displays the approval-gated cancel_workflow_run tool.
• Preserves workflow authorization and workspace scoping across both adapters.
• Adds abort-aware rollback and post-commit reconciliation for paused, resumed, and workflow-group executions.

Confidence Score: 5/5

The PR appears safe to merge.

No blocking failure remains.

Important Files Changed

Filename	Overview
apps/sim/lib/execution/cancel-workflow-execution-post-auth.ts	Centralizes authorized cancellation and includes rollback before commit plus reconciliation after irreversible cancellation effects.
apps/sim/app/api/workflows/[id]/executions/[executionId]/cancel/route.ts	Reduces the HTTP route to authentication, contract parsing, scope mapping, and delegation to the shared cancellation implementation.
apps/sim/lib/copilot/tools/handlers/workflow/mutations.ts	Adds trusted-context cancellation delegation with workspace scoping and AbortSignal propagation.
apps/sim/lib/copilot/tool-executor/register-handlers.ts	Registers the new cancellation handler in the Copilot tool executor.
apps/sim/lib/copilot/tools/tool-display.ts	Adds user-facing display metadata for the cancellation tool.
apps/sim/app/api/workflows/[id]/executions/[executionId]/cancel/route.test.ts	Covers workspace concealment, abort rollback, failed rollback reconciliation, and durable workflow-group commit behavior.

Sequence Diagram

sequenceDiagram
  participant Caller as HTTP route / Copilot
  participant Cancel as Shared cancellation boundary
  participant Auth as Workflow authorization
  participant State as Execution and pause state
  participant Stop as Queue / local / durable stop
  Caller->>Cancel: workflowId, executionId, userId, scope
  Cancel->>Auth: authorize write access
  Auth-->>Cancel: workflow workspace
  Cancel->>State: load execution and stage paused cancellation
  alt aborted before commit
    Cancel->>State: roll back staged cancellation
    Cancel-->>Caller: 409 aborted
  else cancellation commits
    Cancel->>Stop: signal and record cancellation
    Cancel->>State: finish terminal reconciliation
    Cancel-->>Caller: cancellation result
  end

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_{Reviews (7): Last reviewed commit: "improvement(copilot): simplify cancellat..." | Re-trigger Greptile}

[cubic-dev-ai]

All reported issues were addressed across 9 files

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[j15z]

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