---
# claudbg-nqxz
title: Duration shows 0ms — RawEntry.duration_ms field name mismatch (durationMs vs duration_ms)
status: completed
type: bug
priority: high
created_at: 2026-03-30T04:44:06Z
updated_at: 2026-03-30T05:02:50Z
parent: claudbg-8vpb
---

## Problem

`sessions transcribe` shows `Duration: 0ms` even for long sessions.

## Root cause

The JSONL file uses camelCase `durationMs` at the entry level:

```json
{"type": "system", "durationMs": 3446227, ...}
```

But `RawEntry` declares the field as `duration_ms: Option<u64>` with no serde rename:

```rust
// src/models/session.rs:33
pub duration_ms: Option<u64>,
```

Serde looks for `duration_ms` (snake_case), finds nothing, and the value falls into the `extra` catch-all map instead. `compute_stats` then sums zeros.

## Fix

Add `#[serde(rename = "durationMs")]` to the field:

```rust
#[serde(rename = "durationMs")]
pub duration_ms: Option<u64>,
```

Alternatively use `#[serde(alias = "durationMs")]` to accept both forms.

## Confirmed by

Running against session `21fae0a8`: `grep '"durationMs":[0-9]'` finds entries like `{"type":"system","durationMs":3446227,...}` confirming the field name is camelCase.

## Relevant files

- `src/models/session.rs` — `RawEntry`, `duration_ms` field (line 33)
- `src/models/stats.rs` — `compute_stats`, accumulates `entry.duration_ms`

## Summary of Changes

Added `#[serde(rename = "durationMs")]` to the `duration_ms` field on `RawEntry` in `src/models/session.rs`. No other changes needed — `compute_stats` already reads `entry.duration_ms` correctly.