---
title: "Eou Preemption Analysis"
method: GET
path: "/v1/admin/eou-preemption-analysis"
tags: ["admin"]
---

# Eou Preemption Analysis

`GET /v1/admin/eou-preemption-analysis`

Offline viability check for synthesized PREFLIGHT_TRANSCRIPT.

For each assistant turn that has `eou_probability_samples` recorded, asks:
when did Smart Turn v3 first cross `threshold`, vs. when did the STT
final transcript arrive? If Smart Turn fires reliably *before* the STT
final, it's a viable trigger for speculative LLM kickoff in languages
that don't have Flux's native eager-EOT (Spanish, etc.).

Sources considered as "smart turn": `smart_turn_v3` and
`smart_turn_v3_shadow` (the shadow-mode label).

Returned per language:
  - turns: total turns with any smart-turn samples
  - crossed_count: turns where Smart Turn ever crossed threshold
  - crossed_pct: 100 * crossed_count / turns
  - early_advantage_ms: how many ms Smart Turn's first crossing
      preceded the STT final (positive = useful; negative = too late).
      Reported as p10/p50/p90.
  - false_cross_count: number of times the signal crossed threshold
      then dropped back below before the final crossing.
      Reported as mean/p50/p90.
  - crossing_count_total: total threshold crossings per turn (mean).

## Query parameters

- `days` integer
- `threshold` number

## Response `200`

Successful Response

- unknown

## Other responses

- `422` — Validation Error

---

[API](https://skmtc.dev/roxels/apis/interviewer.md) · [All operations](https://skmtc.dev/roxels/apis/interviewer/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/roxels/interviewer/revisions/4ef48ed226e1/schema)