feat: add custom metadata support and HTTP response metadata #2051
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fdncred
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Oct 8, 2025
## Release notes summary - What our users need to know
This PR adds two related features:
1. Custom metadata via `metadata set --merge`: Attach arbitrary metadata
to pipeline data:
```nushell
"data" | metadata set --merge {custom_key: "value"} | metadata | get custom_key
```
2. Automatic HTTP response metadata: All HTTP commands now attach
response metadata under `http_response`:
- `status` - HTTP status code
- `headers` - Response headers as `[{name, value}, ...]`
- `urls` - Redirect history
Access metadata after the response completes:
```nushell
http get https://api.example.com | metadata | get http_response.status
# => 200
```
Or access metadata while streaming the response body using `metadata
access`:
```nushell
http get https://api.example.com/events.jsonl
| metadata access {|meta|
if $meta.http_response.status != 200 {
error make {msg: "failed"}
} else { }
}
| lines
| each { from json }
| where event_type == "error"
```
Unlike `--full`, which consumes the entire response body, this allows
streaming while accessing metadata.
## Breaking changes
`collect` now removes `FilePath` data_source even when `content_type` is
set. Previously: both preserved. Now: `content_type` preserved,
`FilePath` cleared.
corresponding PR: nushell/nushell.github.io#2051
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github is being weird, there should be one more commit on this PR: main...cablehead:nushell.github.io:http-response-metadata 
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i'm not sure what's going on with the commits. that's weird. |
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github was struggling this morning; looks like that commit has been pulled in now |
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corresponding PR: nushell/nushell#16821