Observation record

Field by field, from the recorded trace. The examples are the captured values from observation 02 and observation 04.

Top level

Field	Type	Meaning	Example
`id`	number	A positive integer assigned by the capture harness. File order supplies the sequence; the viewer does not enforce unique or consecutive IDs.	`2`
`title`	string	A short name for what happened.	`Update awaiting reload`
`action`	string	What was done just before this observation.	`Approved cpu-2. ...`
`receivedAt`	string, ISO 8601 with zone	When the observation was received. The app refuses a timestamp without an explicit zone.	`2026-10-10T07:41:29.613Z`
`observation`	object	The comparison itself, below.

observation

Field	Type	Meaning	Example
`scope`	string	Where the loaded report comes from.	`managed-onnx-session-self-report`
`status`	`matched`, `pending` or `unknown`	The result of the comparison. See States and codes.	`pending`
`code`	optional string	A diagnostic reason code. The captured run uses it for unavailable evidence; a pending observation can also carry a rejected-reload reason.	`RUNTIME_UNAVAILABLE`
`desired`	object	The approved release.
`loaded`	object or `null`	What the runtime reports it loaded. `null` when there is no report.
`loadedEvidence`	string, only when `loaded` is `null`	Says the loaded side is missing.	`unavailable`

desired, and loaded.metadata

Both carry the same identity fields, so they can be compared one by one.

Field	Meaning
`releaseId`	The release's name, such as `cpu-2`.
`generation`	Its generation number: `cpu-1` is 1, `cpu-2` is 2.
`modelSha256`	SHA-256 digest of the model.
`configurationSha256`	SHA-256 digest of the configuration. The same in `cpu-1` and `cpu-2` in the captured run.
`releaseSha256`	SHA-256 digest of the release.
`receiptSha256`	SHA-256 digest of the receipt recorded for the release.

loaded.runtime and loaded.sessionId

Field	Meaning	Checked against the policy
`ortVersion`	The ONNX Runtime version the session runs.	Yes: must be exactly `1.23.2`.
`executionProviders`	The execution providers in use.	Yes: must be exactly `CPUExecutionProvider`.
`pythonVersion`	The Python version of the worker.	No: recorded only.
`sessionId`	The runtime session that loaded the release.	No.

This reference describes the recorded trace and the evidence app's supported schema, not every observation the backend can produce. The backend can retain a worker report on an unknown observation when it cannot compare that report with authorized desired state. This viewer refuses that shape with TRACE_LOADED_ON_UNAVAILABLE; it is not evidence that the backend cannot retain the report. Backend lastRejection details are outside the viewer's defined fields and appear only as unvalidated extras in raw JSON and export.

A complete example

observation 02, reload pendingJSON

{
  "id": 2,
  "title": "Update awaiting reload",
  "action": "Approved cpu-2. The baseline continues serving its loaded cpu-1 until explicit reload.",
  "receivedAt": "2026-10-10T07:41:29.613Z",
  "observation": {
    "scope": "managed-onnx-session-self-report",
    "status": "pending",
    "desired": {
      "generation": 2,
      "releaseSha256": "375de916f3f9128dd8284a9dae474c1fe5edcf253c8a7ab69a1c5f720f31ea12",
      "releaseId": "cpu-2",
      "modelSha256": "444602040ca9aaa4b1a990799fbe6b697763d1a08144ee1f9711eb12adc49d2d",
      "configurationSha256": "6289dfd4c088e75fa4725c3269d9ba6316e0d9e11d863c17af0b2955315bd382",
      "receiptSha256": "d621d4c70a127586002f1261b79ff6cf1e48f258cf819b184f0ff8a68a819e33"
    },
    "loaded": {
      "runtime": {
        "ortVersion": "1.23.2",
        "executionProviders": ["CPUExecutionProvider"],
        "pythonVersion": "3.12.14"
      },
      "sessionId": "4ef27956b34246b5be6c64a6109d9212",
      "metadata": {
        "generation": 1,
        "releaseSha256": "611e3ac6eb818530873c76bac0cd3f328ce87ce99cbcad6407ad47abb96dc0e1",
        "releaseId": "cpu-1",
        "modelSha256": "c1b943a655da728daea6b43332ff557af3da6466b4f9e0c938b42595222dc5ac",
        "configurationSha256": "6289dfd4c088e75fa4725c3269d9ba6316e0d9e11d863c17af0b2955315bd382",
        "receiptSha256": "15357f4908031bbeeb5aae187cb2c28d3d0ea17c5c2bea120176b1a750754ab7"
      }
    }
  }
}

Last updated: October 12, 2026