# NPU advisory decision schema and dry-run evaluation metrics

This document defines the compact `npu_advisory_decision_v1` record and the
minimum dry-run metrics required before any OpenVINO/NPU advisory lane is
considered for promotion. The schema is advisory-only: it creates audit evidence
and comparison data, not live authority.

Scope and safety defaults:

- Local audit records only; no outbound sends, service restarts, tool execution,
  memory writes, routing changes, vector-store mutation, or broad private scans.
- Synthetic or explicitly non-private fixtures only for dry-run evaluation.
- Raw prompts, transcripts, documents, images, headers, secrets, and full upstream
  JSON payloads are not persisted by default.
- NPU output is evidence for a gate. It must never directly perform or trigger
  an action.

## `npu_advisory_decision_v1`

Required top-level fields:

| Field | Type | Required | Notes |
| --- | --- | ---: | --- |
| `schema_version` | string | yes | Always `npu_advisory_decision_v1`. |
| `decision_id` | string | yes | Locally generated UUID/ULID. No payload-derived PII. |
| `timestamp` | string | yes | RFC3339/ISO-8601 UTC timestamp. |
| `source` | object | yes | Where the dry-run input came from. |
| `service` | object | yes | Advisory lane/service that produced the recommendation. |
| `input_class` | string | yes | Normalized class such as `context_gate`, `cron_n8n_event`, `batch_doc_triage`, `voice_audio`, `kanban_hygiene`, or `advisory_gateway_envelope`. |
| `recommendation` | object | yes | NPU/advisory recommendation and rationale metadata. |
| `confidence` | object | yes | Score, bucket, and calibration notes. |
| `authority_flags` | object | yes | Explicit booleans for authority boundaries; all default false. |
| `allowed_actions` | array[string] | yes | Actions a downstream gate may consider. Defaults to advisory-only actions. |
| `actual_action` | object | yes | What really happened. In this gate it should always be no-op/record-only. |
| `human_or_atlas_decision` | object | yes | Comparison target from fixture expected label, human label, or Atlas decision. |
| `outcome` | object | yes | Agreement/error bucket used by the eval harness. |
| `npu_proof` | object | yes | Evidence that a real NPU-backed inference ran, where available. |
| `latency` | object | yes | Request latency and optional queue/processing timings. |
| `fallback` | object | yes | Whether CPU/offline/health-only fallback happened and why. |
| `privacy` | object | yes | What was redacted/hashed and what retention class applies. |
| `notes` | array[string] | no | Short non-private audit notes. |

### Field details

`source`:

- `kind`: `fixture`, `manual_label`, `atlas_shadow`, `human_review`, or
  `service_health_probe`.
- `fixture_id`: stable fixture identifier when applicable.
- `fixture_set`: fixture collection name/version.
- `artifact_ref`: optional local path or opaque run id; do not include raw
  private content.
- `content_hash`: optional SHA-256 over sanitized fixture content.
- `privacy_class`: `synthetic`, `public`, `non_private`, `redacted`, or
  `private_disallowed`.

`service`:

- `name`: e.g. `openvino_context_gate`, `cron_n8n_advisory`,
  `npu_batch_triage`, `npu_voice_audio_pipeline`, `kanban_hygiene_advisory`,
  `openvino_advisory_gateway`.
- `endpoint`: local endpoint label or script name; avoid sensitive URL params.
- `mode`: `dry_run`, `shadow`, `health_only`, or `offline_fixture`.
- `model`: optional model/backend label, if safe to log.

`recommendation`:

- `label`: normalized recommendation, e.g. `suppress`, `log`, `summarize`,
  `escalate`, `retrieve_more_context`, `skip_private_root`, `needs_human`,
  `no_action`, or `unknown`.
- `severity`: `none`, `info`, `low`, `medium`, `high`, or `critical`.
- `reasons`: short non-private reason codes, not raw excerpts.
- `evidence_refs`: bounded references to sanitized fixture fields or artifact ids.
- `raw_output_ref`: optional local artifact pointer; default null.

`confidence`:

- `score`: float from 0.0 to 1.0 when available, otherwise null.
- `bucket`: one of `very_low`, `low`, `medium`, `high`, `very_high`, or
  `unknown`.
- `bucket_rule`: the threshold rule used by the harness.
- `calibrated`: boolean; false until enough labeled dry-run data exists.

Recommended confidence buckets:

| Bucket | Score range | Gate behavior |
| --- | --- | --- |
| `very_low` | `< 0.40` | Treat as uncertain; never escalate automatically. |
| `low` | `0.40-0.59` | Advisory note only; human/Atlas decides. |
| `medium` | `0.60-0.79` | Eligible for comparison metrics; no live action. |
| `high` | `0.80-0.94` | Strong advisory evidence; still gated. |
| `very_high` | `>= 0.95` | Promotion candidate only after repeated eval success. |
| `unknown` | null/missing | Count separately; do not coerce to zero. |

`authority_flags`:

All flags default to false and must remain false for this gate.

- `can_route_atlas`
- `can_write_memory`
- `can_execute_tools`
- `can_restart_services`
- `can_send_outbound`
- `can_scan_private_roots`
- `can_mutate_vector_store`
- `can_post_advisory_event`
- `can_change_gateway_config`
- `requires_human_approval`
- `advisory_only`

For this gate, `advisory_only=true` and `requires_human_approval=true` for any
recommendation that could eventually affect live behavior.

`allowed_actions`:

Allowed by default:

- `record_metric`
- `compare_with_expected_label`
- `include_in_digest`
- `open_review_ticket_candidate`
- `recommend_human_review`

Disallowed unless a later approval explicitly changes scope:

- `route_atlas`
- `write_memory`
- `execute_tool`
- `restart_service`
- `send_message`
- `scan_private_root`
- `mutate_vector_store`
- `post_gateway_event`

`actual_action`:

- `kind`: should be `none`, `recorded_metric`, or `dry_run_reported`.
- `performed`: boolean; false for live side effects in this gate.
- `performed_by`: `harness`, `human`, `atlas`, or null.
- `side_effects`: array; should be empty except local report/artifact writes.

`human_or_atlas_decision`:

- `source`: `fixture_expected`, `human_label`, `atlas_shadow`, or `missing`.
- `label`: normalized decision label using the same label set as
  `recommendation.label` when possible.
- `severity`: normalized severity when applicable.
- `confidence`: optional Atlas/human confidence if available.
- `decision_ref`: optional review id, fixture id, or session/run id.
- `timestamp`: optional timestamp for the comparison decision.

`outcome`:

- `comparison`: `agree`, `disagree`, `uncertain`, `missing_reference`, or
  `not_applicable`.
- `error_type`: null or one of `false_positive`, `false_negative`,
  `severity_overcall`, `severity_undercall`, `unsafe_authority`,
  `privacy_violation`, `fallback_unexpected`, `latency_slo_miss`,
  `npu_proof_missing`.
- `human_review_required`: boolean.
- `promotion_blocker`: boolean.

`npu_proof`:

- `proof_mode`: `sysfs_busy_delta`, `service_reported_delta`, `health_only`,
  `offline_fixture`, or `unavailable`.
- `busy_delta_us`: integer or null.
- `service_reported_delta_us`: integer or null.
- `inference_ran`: boolean.
- `proof_ok`: boolean or null. Null means not measurable, not false.
- `counter_path`: usually `/sys/class/accel/accel0/device/npu_busy_time_us`, if
  logged safely.

`latency`:

- `total_ms`: end-to-end harness timing.
- `service_ms`: service-reported processing time when available.
- `queue_ms`: optional queue time.
- `timeout`: boolean.

`fallback`:

- `occurred`: boolean.
- `kind`: null, `cpu`, `offline`, `health_only`, `service_unavailable`,
  `skipped_cold_load`, `private_root_blocked`, or `proof_unavailable`.
- `reason`: short reason code.
- `expected`: boolean. Expected fallbacks are counted but do not fail promotion
  unless their rate exceeds the threshold for that lane.

`privacy`:

- `payload_logged`: must default false.
- `redaction`: `none_needed`, `hash_only`, `paths_only`, `metadata_only`, or
  `blocked_private`.
- `retention`: `ephemeral`, `local_audit`, or `review_artifact`.
- `contains_private_payload`: must be false for committed fixtures.

## Minimal JSON shape

```json
{
  "schema_version": "npu_advisory_decision_v1",
  "decision_id": "01J00000000000000000000000",
  "timestamp": "2026-06-06T00:00:00Z",
  "source": {
    "kind": "fixture",
    "fixture_id": "cron_duplicate_success_001",
    "fixture_set": "npu_advisory_eval_v1",
    "artifact_ref": null,
    "content_hash": "sha256:example",
    "privacy_class": "synthetic"
  },
  "service": {
    "name": "cron_n8n_advisory",
    "endpoint": "openvino-advisory-gateway/examples/cron-advisory-dry-run.sh",
    "mode": "dry_run",
    "model": "openvino-local"
  },
  "input_class": "cron_n8n_event",
  "recommendation": {
    "label": "suppress",
    "severity": "info",
    "reasons": ["duplicate_success", "no_action_required"],
    "evidence_refs": ["fixture:event_kind", "fixture:status"],
    "raw_output_ref": null
  },
  "confidence": {
    "score": 0.91,
    "bucket": "high",
    "bucket_rule": "v1_default",
    "calibrated": false
  },
  "authority_flags": {
    "can_route_atlas": false,
    "can_write_memory": false,
    "can_execute_tools": false,
    "can_restart_services": false,
    "can_send_outbound": false,
    "can_scan_private_roots": false,
    "can_mutate_vector_store": false,
    "can_post_advisory_event": false,
    "can_change_gateway_config": false,
    "requires_human_approval": true,
    "advisory_only": true
  },
  "allowed_actions": [
    "record_metric",
    "compare_with_expected_label",
    "include_in_digest"
  ],
  "actual_action": {
    "kind": "dry_run_reported",
    "performed": false,
    "performed_by": "harness",
    "side_effects": []
  },
  "human_or_atlas_decision": {
    "source": "fixture_expected",
    "label": "suppress",
    "severity": "info",
    "confidence": null,
    "decision_ref": "cron_duplicate_success_001",
    "timestamp": null
  },
  "outcome": {
    "comparison": "agree",
    "error_type": null,
    "human_review_required": false,
    "promotion_blocker": false
  },
  "npu_proof": {
    "proof_mode": "sysfs_busy_delta",
    "busy_delta_us": 1200,
    "service_reported_delta_us": 1180,
    "inference_ran": true,
    "proof_ok": true,
    "counter_path": "/sys/class/accel/accel0/device/npu_busy_time_us"
  },
  "latency": {
    "total_ms": 42.5,
    "service_ms": 39.1,
    "queue_ms": null,
    "timeout": false
  },
  "fallback": {
    "occurred": false,
    "kind": null,
    "reason": null,
    "expected": false
  },
  "privacy": {
    "payload_logged": false,
    "redaction": "metadata_only",
    "retention": "local_audit",
    "contains_private_payload": false
  },
  "notes": []
}
```

## Dry-run comparison strategy

Each fixture or shadow input should produce one `npu_advisory_decision_v1`
record. The harness compares `recommendation` to `human_or_atlas_decision` in
this order:

1. Use `fixture_expected` labels for synthetic/non-private regression fixtures.
2. Use explicit `human_label` for reviewed samples.
3. Use `atlas_shadow` only as a comparison signal, not ground truth, when a human
   label is unavailable.
4. Mark `missing_reference` rather than inventing a target decision.

Comparison categories:

- `agree`: normalized label and severity are compatible.
- `disagree`: label conflicts with the reference decision.
- `uncertain`: NPU bucket is `very_low`, `low`, or `unknown`, or the service
  returned a deliberate `needs_human`/`unknown` label.
- `false_positive`: NPU recommended escalation/action but reference says
  suppress/no-op.
- `false_negative`: NPU recommended suppress/no-op but reference says escalate or
  action-needed.
- `severity_overcall` / `severity_undercall`: label matches but severity differs
  by more than one level.

The summary should be grouped by lane (`input_class` and `service.name`) and by
confidence bucket. Unknown metrics remain null/`n/a`; do not coerce missing data
to zero.

## Metrics

Minimum per-run metrics:

- `total_records`
- `records_by_input_class`
- `records_by_service`
- `confidence_bucket_counts`
- `recommendation_counts`
- `authority_flag_violation_count`
- `privacy_violation_count`
- `actual_side_effect_count`
- `agree_count`, `disagree_count`, `uncertain_count`, `missing_reference_count`
- `false_positive_count`, `false_negative_count`
- `severity_overcall_count`, `severity_undercall_count`
- `fallback_count` and `fallback_counts_by_kind`
- `expected_fallback_count` vs `unexpected_fallback_count`
- `npu_proof_ok_count`, `npu_proof_missing_count`, `npu_proof_not_applicable_count`
- p50/p95 `latency.total_ms` by service and input class
- `timeout_count`

Recommended derived rates:

- `agreement_rate = agree / (agree + disagree + false_positive + false_negative + severity_overcall + severity_undercall)`
- `uncertain_rate = uncertain / total_records`
- `false_positive_rate = false_positive / comparable_records`
- `false_negative_rate = false_negative / comparable_records`
- `unsafe_authority_rate = authority_flag_violation_count / total_records`
- `privacy_violation_rate = privacy_violation_count / total_records`
- `unexpected_fallback_rate = unexpected_fallback_count / total_records`
- `proof_ok_rate = npu_proof_ok_count / proof_required_records`

## Acceptance thresholds before future promotion

These thresholds are for considering a later, separately approved promotion.
They do not grant authority by themselves.

Global blockers for every lane:

- `authority_flag_violation_count == 0`.
- `actual_side_effect_count == 0` for dry-run harness execution.
- `privacy_violation_count == 0` and no committed private fixtures/secrets.
- No raw private payloads in logs, reports, artifacts, or test fixtures.
- No service bind, route, memory, tool, send, restart, or vector-store mutation
  introduced by the eval code.

Minimum data quality before promotion discussion:

- At least 30 comparable synthetic/non-private records per lane, or all available
  lane fixtures if the lane is explicitly scoped smaller.
- Every advisory lane has at least one normal case, one low-confidence case, one
  false-alarm/noise case, and one action-needed/escalation case.
- `missing_reference_count == 0` for promotion-candidate fixture sets.
- Confidence bucket distribution is reported and stable across at least three
  dry-run executions.

Suggested metric thresholds:

| Metric | Threshold for promotion discussion |
| --- | ---: |
| Agreement rate | `>= 0.95` overall and `>= 0.90` per lane |
| False positive rate | `<= 0.03` overall and no repeated high-severity false positives |
| False negative rate | `<= 0.01` for action-needed/escalation cases |
| Uncertain rate | `<= 0.15` overall, unless lane is intentionally conservative |
| Unexpected fallback rate | `<= 0.02` and every fallback has a reason code |
| NPU proof OK rate | `>= 0.98` for proof-required lanes |
| p95 latency | Within the lane-specific SLO documented by the implementation task |
| Authority/privacy violations | exactly `0` |

Promotion remains lane-specific. A passing context-gate eval does not promote
cron/n8n, voice/audio, batch triage, Kanban hygiene, or advisory gateway lanes.
Each lane needs its own human-approved scope, rollback plan, and review.

## Output formats

The dry-run harness should emit:

1. JSONL decisions: one `npu_advisory_decision_v1` object per line.
2. Compact JSON summary: aggregate counts/rates for dashboards and follow-up
   digest scripts.
3. Compact Markdown/text summary: suitable for terminal, Telegram, or Discord.

The Markdown/text summary should include:

- run id, fixture set, generated-at timestamp;
- records by lane/service;
- agreement/uncertain/false-positive/false-negative counts;
- confidence bucket distribution;
- fallback counts;
- NPU proof counts;
- authority/privacy violation counts;
- promotion blockers and caveats.

## Fixture expectations

Use synthetic/non-private fixtures only. Required lanes:

- `context_gate`: retrieve/no-retrieve decisions with missing, conflicting, and
  sufficient context cases.
- `cron_n8n_event`: duplicate success, stale warning, urgent false alarm, and
  action-needed failure.
- `batch_doc_triage`: private-root blocked, approved synthetic sample, noisy OCR,
  and needs-human cases.
- `voice_audio`: bounded generated audio, low-confidence transcript, harmless
  background noise, and action-needed command-like utterance that must not
  execute.
- `kanban_hygiene`: no-op healthy card, stale/card-needs-review, false alarm, and
  action-needed label.
- `advisory_gateway_envelope`: valid classify/generate/triage envelope examples
  plus malformed/unsafe authority-request examples.

Any fixture that resembles private content should be replaced with a synthetic
fixture or reduced to metadata/hash-only form before committing.

## Review checklist

Before implementation or docs depending on this spec are accepted, verify:

- `schema_version` is present and all authority flags default closed.
- Dry-run execution produces no live side effects beyond local report/artifact
  writes.
- Unknown/missing metrics are represented as null/`n/a`, not fake zero.
- Raw payloads and private paths are not persisted by default.
- Summary metrics include confidence buckets, fallback counts, NPU proof, and
  authority/privacy violations.
- Promotion language says "candidate" or "discussion" only; no automatic live
  authority is granted by a passing eval.
