# enhance-dev recording append-audio-chunk ```text enhance-dev recording append-audio-chunk [options] ``` ## Arguments This command takes no positional arguments. ## Options | Option | Required | Default | Meaning | | --- | --- | --- | --- | | `--recording-id ` | Yes | None | Recording id, from `enhance recording list` or `recording start`. | | `--index ` | Yes | None | Zero-based chunk index expected by the current recording upload. | | `--first-ms ` | Yes | None | Start offset of this audio chunk, in milliseconds. | | `--last-ms ` | Yes | None | End offset of this audio chunk, in milliseconds. | | `--bytes ` | Yes | None | Exact byte length of the content uploaded through the signed URL. | | `--epoch [number]` | No | `0` | Zero-based independently decodable audio segment number. | | `--starts-epoch [boolean]` | No | `false` | True when this audio chunk contains its epoch container header. | | `--etag [string]` | No | None | ETag from the already-uploaded audio chunk at `--index`; omit only when abandoning it. | | `--json ` | No | None | Complete procedure input as JSON; do not combine it with field flags. | | `--client-token ` | No | None | Stable UUID to reuse when retrying the exact same mutation. | ## Input This command presents the capability `recording.appendAudioChunk`. It has write effect and single idempotency.

Show complete input JSON Schema

```json {"$schema":"https://json-schema.org/draft/2020-12/schema","type":"object","properties":{"recordingId":{"type":"string","format":"uuid","pattern":"^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$"},"index":{"type":"integer","minimum":0,"maximum":9007199254740991},"firstMs":{"type":"integer","minimum":0,"maximum":9007199254740991},"lastMs":{"type":"integer","minimum":0,"maximum":9007199254740991},"bytes":{"type":"integer","minimum":1,"maximum":9007199254740991},"epoch":{"default":0,"type":"integer","minimum":0,"maximum":9007199254740991},"startsEpoch":{"default":false,"type":"boolean"},"etag":{"type":"string","minLength":1,"maxLength":200}},"required":["recordingId","index","firstMs","lastMs","bytes"]} ```

## Output This command writes JSON records to standard output. Returns a typed recording.appendAudioChunk result from the Enhance API without transport-specific prose.

Show complete output JSON Schema

```json {"$schema":"https://json-schema.org/draft/2020-12/schema","type":"object","properties":{"nextChunkIndex":{"type":"integer","minimum":1,"maximum":9007199254740991},"upload":{"type":"object","properties":{"url":{"type":"string","format":"uri"},"expiresAt":{"type":"string","format":"date-time","pattern":"^(?:(?:\\d\\d[2468][048]|\\d\\d[13579][26]|\\d\\d0[48]|[02468][048]00|[13579][26]00)-02-29|\\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\\d|30)|(?:02)-(?:0[1-9]|1\\d|2[0-8])))T(?:(?:[01]\\d|2[0-3]):[0-5]\\d(?::[0-5]\\d(?:\\.\\d+)?)?(?:Z))$"},"headers":{"type":"object","propertyNames":{"type":"string"},"additionalProperties":{"type":"string"}}},"required":["url","expiresAt","headers"],"additionalProperties":false}},"required":["nextChunkIndex","upload"],"additionalProperties":false} ```

## Examples ```bash enhance-dev recording append-audio-chunk --recording-id --index --first-ms --last-ms --bytes ```

Show example input

```json { "recordingId": "00000000-0000-4000-8000-000000000010", "index": 0, "firstMs": 0, "lastMs": 0, "bytes": 1 } ```

Show example output

```json { "nextChunkIndex": 1, "upload": { "url": "https://example.test/path", "expiresAt": "2026-08-10T00:00:00.000Z", "headers": {} } } ```

## Exit behaviour | Exit code | Meaning | | --- | --- | | `0` | The command succeeded. | | `1` | The command failed for another reason (`INTERNAL`). A write may have an unknown outcome. | | `2` | The command line was malformed. Nothing ran. | | `3` | The API refused the input (`BAD_REQUEST`). | | `4` | The credential is missing or expired (`UNAUTHORIZED`). | | `5` | The API refused the request (`FORBIDDEN`, `NOT_FOUND`, `CONFLICT`, `RATE_LIMITED`). | | `6` | A batch finished only in part. Retry with the same `--client-token`. | ## Versions Minimum tested versions: Enhance CLI and MCP runtime 0.1.40, plugin 1.0.38, Node.js 24. No older floor is published.