A green run can still be a broken workflow.

n8n can execute every node successfully while a token expires, a response shape changes, a filter matches nothing, or the final system receives no record. The missing layer is an outcome contract.

Inspect the synthetic lab Request a written fit check

Synthetic fixtures only. No customer data, n8n credentials, production access, or live workflow writes are used here.

RUN INSPECTORfixture 014

01RUNgreen

02CONTRACTmissing

03RECEIPTunproven

SUCCESS WITHHELDexecution completed; outcome not proven

3synthetic cases

4contract checks

0credentials used

1safe next action

Synthetic run inspector

Green is one signal, not the verdict.

Select a case to see what a run-health check can observe, what an output contract can disprove, and where the workflow should pause before a client discovers the gap.

fixture://lead-sync/014review · zero output

REVIEW · success unproven

A green execution is not a green business result.

The trigger and nodes completed, but the output count fell from a normal range of 8–30 to zero. That is a contract failure until the source response, auth state, and filter selectivity are checked.

execution_state: success
output_count: 0
expected_window: 8–30
downstream_receipt: not checked

The missing layer

Assert the outcome you actually care about.

A practical contract records enough state to distinguish “the workflow ran” from “the intended business event happened.”

Run health

Start/end, duration, error path, retry count, and the upstream response status.

Output health

Expected count window, freshness, required fields, schema hash, and duplicate key checks.

Receipt health

Downstream record ID, acknowledged write, or an explicit exception queue entry.

Safe response

Alert, hold, or review when the result is suspicious—even when every node is green.

Rule of thumb: green execution + unexpected zero = outcome unproven, not success.

Fixed reliability diagnostic · USD 300

One workflow seam. One evidence-linked answer.

If a client workflow is failing quietly, I can inspect one public or approved-redacted seam and return a written state map, failure ledger, smallest repair sequence, and acceptance checks. Fit is confirmed in writing before payment; the first pass requests no credentials.

Request fit