Show more session details in list subcommand

[noperator]

I frequently have a bunch of shpool sessions running, and I'd like to easily see the session I most recently used. Right now, there's no way to do that (STARTED_AT does not imply "last used").

I'm imagining something like this. You can ignore the tee/column commands as I'm just using them to sort and format the output. Note the three new options: one for each new column, and a third to control the date formatting so it's easier to sort.

$ shpool list \
    --connected-at \
    --disconnected-at \
    --date-format '%Y-%m-%dT%H:%M:%S' |
    tee >/dev/null >(head -n 1) >(tail -n +2 | sort -Vk4) |
    column -t

NAME             STARTED_AT           CONNECTED_AT         DISCONNECTED_AT      STATUS
illegal-hacking  2025-12-08T14:51:28  2026-01-15T08:22:41  2026-01-15T12:08:19  disconnected
pr-review        2026-01-11T22:20:04  2026-01-18T10:30:15  2026-01-18T14:55:33  disconnected
claude-code      2025-12-29T15:59:47  2026-01-20T09:15:22  2026-01-20T17:42:08  disconnected

Will open a PR for this.

[ethanpailes]

I don't think expanding the tabular output is the best way to expose extra fields like this. Optional columns that show up based on the presence or absense of per-column flags seems clunky to me and I'd rather avoid an ever expanding list of flags as more data gets added.

I think a better option for programmatic output would be emitting a json blob which can then be munged on the command line with jq and easily processed by programming languages if someone wants to write a wrapper script for shpool or something.

I think the best approach would be to add a new -j/--json flag to shpool list that emits a json list of json objects containing all the data on all sessions.

[noperator]

I like that. So leave current list as is, and add the single JSON flag? I'll put up a new PR.

[ethanpailes]

Thanks!

[noperator]

See #294