Fault Atlas | Understudy / Frank Epps
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UNDERSTUDYTHE DESCENT
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OBSERVATORY / Integration diagnosis

Fault Atlas

One missing source. Two independent branches. Trace what actually ran.

Interactive here
FICTIONAL RECORDSBrowser-only example. Nothing is sent or stored on a server.
First failureEvidence
Summary records produced12
Requests completedUnobserved
Steps unreached2

SIGNAL EVIDENCE

Evidence

failed

FIXTURE-EVIDENCE: injected failure; no successful output observed.

Output records
Unobserved
Evidence date
2026-09-10 / synthetic
Source
Fixed expedition fixture
Dependency contract

Each node runs only when every dependency passed. The digest depends on normalized records, not scheduling. A produced summary is not a completed request.

{
  "id": "evidence",
  "name": "Evidence",
  "depends": [
    "normalize"
  ],
  "status": "failed",
  "count": null,
  "evidence": "FIXTURE-EVIDENCE: injected failure; no successful output observed."
}
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