> ## Documentation Index
> Fetch the complete documentation index at: https://dshtauri.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Runtime and data

> Learn how the desktop app selects runtimes, starts Harness, and separates release and debug data.

The desktop shell separates managed application dependencies from Harness user data.
This allows core updates and development builds without mixing profile state.

## Runtime selection

The release currently manages Node.js `v22.22.0` and pnpm `11.7.0`. For CLI startup,
the shim prefers a compatible user runtime and command before falling back to the
managed copies. The app-managed Harness core is downloaded from
`deepseek-harness-pkg`; official GitHub assets are preferred and a supported mirror can
be used as fallback.

## Directory model

```text theme={null}
<app-data>/
├── runtime/
├── dependencies/
│   ├── dsh/
│   ├── pnpm/
│   └── git/          # Windows when managed Git is needed
├── logs/
│   └── dsh-web.log
└── .store.dat

~/.dsh/
└── profiles/
    └── <id>/
```

`DSH_HOME` overrides the default Harness data root when it is non-empty. Release builds
default to `~/.dsh`; debug builds default to `~/.dsh.dev`.

## Release and debug isolation

| Concern              | Release                 | Debug                  |
| -------------------- | ----------------------- | ---------------------- |
| Default port         | `3080`                  | `3081`                 |
| Harness home         | `~/.dsh`                | `~/.dsh.dev`           |
| Settings store       | `.store.dat`            | `.store.dev.dat`       |
| Service log          | `logs/dsh-web.log`      | `logs/dsh-web.dev.log` |
| Managed dependencies | Shared                  | Shared                 |
| CLI PATH changes     | Enabled by user setting | Intentionally disabled |

## Port behavior

The service binds to `127.0.0.1`. If the preferred port is already occupied, startup
can select a higher free port and pass the resolved URL back to the desktop client. A
future launch can return to the preferred port after it becomes available.

<Warning>
  Shared managed dependencies reduce duplicate downloads, but profiles and debug data
  do not provide operating-system isolation. Do not treat directory separation as a
  sandbox.
</Warning>