office --host with the host table and self-check; board --reset; startup commands written down
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docs/STARTUP.md
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docs/STARTUP.md
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# Starting a project: the three commands and the rule
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Replaces the previous project's four commands. There are three now, and one rule that removes
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most of the confusion.
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## The rule
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> **The folder and the session live on the same machine.**
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> If you are typing inside a session, on the machine that owns the folder, you type
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> `bin/office <folder>` and nothing else.
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`--host` exists for exactly one case: the folder is on a different machine from the shell you are
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typing in. It is stated once; after that the project file remembers it.
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## The three commands
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| What you want | Command |
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|---|---|
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| adopt a folder | `bin/office <folder> --project "<Paperclip project name>"` |
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| adopt a folder Paperclip has never seen | `bin/office <folder> --new "<Name>"` |
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| adopt a folder that lives on another machine | `bin/office <folder> --project "<Name>" --host nixos-desktop` |
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| repair or rebuild the panes | `bin/board`, `bin/board --replace`, `bin/board --reset` |
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| close everything and start again | `bin/project-reset <folder>` |
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Nothing else is needed. In particular you do **not** create the session by hand any more: the
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previous design needed `tuios new --host …` because `office` could not create a session. This one
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can, through the daemon's own verb, so the second command is gone.
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## What `bin/office` does, in order
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1. Reads the folder. If another machine is named, checks first whether that name is *this*
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machine, and runs locally if it is. (The previous version once tried to `ssh` to itself.)
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2. Resolves a host name to an address ssh can reach: `nixos-desktop`/`.13` → `192.168.20.13`,
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`sam-4screen-desktop`/`.27` → `192.168.20.27`, `sam-thinkpad`/`.51` → `192.168.20.51`.
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3. If it really is another machine: tests the login with `ssh -o BatchMode=yes <address> true`,
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then runs the same command there, and prints how to attach.
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4. On the machine that owns the folder: creates the Paperclip project if `--new` was given, or
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adopts the existing one; writes `.harness/harness.toml`, `check.sh`, `NOTES.md` — never
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overwriting anything that exists.
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5. Creates the session if it is missing, on that machine's daemon.
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6. Builds the eight panes, in order, each pane claimed by workspace **name**.
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The last step it cannot do is show you the session. A program may not move your client: the
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daemon refuses `switch-session` from a pane. Switch with TUIOS's own session switcher, or
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`tuios attach --host <machine> <session>`.
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## The three rebuild levels
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| Command | What it does |
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|---|---|
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| `bin/board` | creates what is missing, closes nothing |
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| `bin/board --replace` | closes this project's panes, then builds all eight again |
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| `bin/board --reset` | closes **every** pane in the session, waits for none to remain, clears the workspace names, then builds |
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`--reset` exists because `--replace` on a half-built session can run out of workspace slots and
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leave pages missing.
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Inside a pane, `R` in `Repair>repair` rebuilds everything; `B` only adds what is missing.
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## Traps this design keeps from the previous one
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- A pane's command must carry the project, or a rebuild shows the wrong one.
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- Compare a host name against this machine's own names and addresses before ssh, or you log in to
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yourself.
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- Never store a workspace number; TUIOS deletes an emptied workspace and renumbers the rest.
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- A pane that never exits keeps a workspace alive. `Shell>shell` is that pane here.
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- Scripts resolve their own directory with `realpath`, so a symlinked wrapper still finds its
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siblings.
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