debugging-executions
Debug failed or wrong-output workflow executions using executions tools. Load when the user reports execution failures, unexpected node output, or empty parameter values after a successful run.
What this skill does
# Debugging Executions Use this skill when debugging workflow execution failures or successful runs with wrong or empty values. ## Testing event-triggered workflows Use `executions(action="run")` with `inputData` matching the trigger's output shape — do not rebuild the workflow with a Manual Trigger. For trigger `inputData` shapes, read `knowledge-base/reference/trigger-input-data-shapes.md` when a sandbox workspace is available. ## Failed execution `executions(action="debug")` already includes `failedNode.resolvedParameters` — start there. That bundle has `parameters` (raw, with expressions intact), `resolved` (substituted), `failedExpressions` (those that threw), and `emptyResolutions` (those that resolved to `null`/`undefined`/`""` silently). The offending expression is usually visible without a follow-up call. Entries in either list tagged with `reason: "unreconstructable-context"` are NOT real bugs — they reference variables we don't reconstruct in replay (`$vars`, `$secrets`, `$response`, `$request`, `$pageCount`, `$ai`). The value existed at execution time; we just don't have it here. ## Successful execution with wrong or empty value When `debug` doesn't apply because nothing errored, call `executions(action="get-resolved-node-parameters", executionId, nodeName)` on the node whose output looks off — **do this unprompted**, don't ask the user for permission first. It's a cheap read-only inspection and the only reliable way to confirm whether an empty value came from an expression silently resolving to nullish. Check `emptyResolutions` first; most "this parameter is empty" cases are expressions resolving to `null`/`undefined`/`""`, not thrown errors.
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