[FEATURE]: `opencode session export` to markdown or json

[paralin]

Feature hasn't been suggested before.

• I have verified this feature I'm about to request hasn't been suggested before.

Describe the enhancement you want to request

We need a way to export opencode sessions to Markdown or Json format with a TUI flag.

 % opencode session export -h
opencode session export [sessionID]

export session transcript to file

Positionals:
  sessionID  session id to export                                                           [string]

Options:
  -h, --help        show help                                                              [boolean]
  -v, --version     show version number                                                    [boolean]
      --print-logs  print logs to stderr                                                   [boolean]
      --log-level   log level                   [string] [choices: "DEBUG", "INFO", "WARN", "ERROR"]
      --dir         directory to run in                                                     [string]
  -o, --output      output file path                                                        [string]
  -f, --format      output format       [string] [choices: "markdown", "json"] [default: "markdown"]

[github-actions]

This issue might be a duplicate of existing issues. Please check:

• [FEATURE]: /export /copy missing most agent activity #6089: [FEATURE]: /export /copy missing most agent activity - Related to export functionality and transcript features
• Export functionality seems to be missing in opentui version #3748: (referenced in [FEATURE]: /export /copy missing most agent activity #6089) - Original /copy and /export commands
• [FEATURE]: Session logging as OpenAI messages #7535: [FEATURE]: Session logging as OpenAI messages - Feature to preserve request-response pairs and log sessions
• opencode export outputs messages in wrong order for long sessions #7426: opencode export outputs messages in wrong order for long sessions - Bug report on the export functionality
• How do I get output? #4524: How do I get output? - User issue about exporting session transcripts to file
• [FEATURE]: Making sessions first-class unlocks cheap ChatGPT Projects #4867: [FEATURE]: Making sessions first-class unlocks cheap ChatGPT Projects - Related feature request about session management and export

Feel free to ignore if none of these address your specific case.

[tetipong2542]

I Needed

[paralin]

Implemented; #5426

[dhruvkej9]

@rekram1-node please merge this export is very difficult currently, also there is no way to export to JSON

[Nindaleth]

@paralin hey I was wondering, is the current session export to JSON somehow insufficient? I totally welcome Markdown exports for human consumption, just the JSON is already available and your PR seems to duplicate it.

If no sessionID given, a small and simple selection TUI opens.

$ opencode export --help
opencode export [sessionID]

export session data as JSON

Positionals:
  sessionID  session id to export                                                           [string]

Options:
  -h, --help        show help                                                              [boolean]
  -v, --version     show version number                                                    [boolean]
      --print-logs  print logs to stderr                                                   [boolean]
      --log-level   log level                   [string] [choices: "DEBUG", "INFO", "WARN", "ERROR"]

[mrw]

I'm not the original creator of this, but I am also looking forward to this. For us, the markdown export is definitely more useful than the JSON because we want to make it readable for humans without going through a whole additional level of JSON->Markdown transformation.

[Nindaleth]

@mrw if you need something right now, OpenCode already supports /export which does exactly the MD export of the active session - product of an earlier PR of @paralin (just found out and used today, thx!)