Liu Cong

 Should have a seperater at the arrow, to indicate that subflow `tidb.stop` finished, and the executable-file was about to be executed

``` ticat display.env.hide.prefix my-prefix : ... ```

Facing lots of commands, user can't easily understand how to use a related set of commands. We need some examples to guide users. Maybe something like man pages?

Accept user flow as a tcp/http service, so we don't need to run ticat on command line

If we could call another ticat instance on a remote server, that we could have a ticat cluster, to do things distributely. For example, we could use some worker-ticat to...

If a flow is huge(long, has lots of commands), that we could let user choose to display only some of the key commands, to make the display simplier: * Display...

When we execute a flow, if it miss some of the `dep` os commands, that the executing will not process and display errors. We could auto install these os commands...

Duration maybe not right when showing the executing status with `ticat session.desc <session-id>`

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Now the sub-flows are fetched from `cmds`, so it will display `modified, not matched` error when the sub-flows were modified