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# Sailfish Devel MCP
Host-side Model Context Protocol server for Sailfish OS development workflows.
This first iteration is dependency-free: it implements MCP over stdio directly
with Python's standard library and exposes typed tools around commands that are
easy to get wrong during day-to-day Sailfish work.
## Scope
The server currently exposes tools for:
- Sailfish device access over SSH
- defaultuser session-bus calls
- Lipstick screenshots
- touchscreen discovery and tap/swipe injection
- topmost window PID lookup
- process map inspection
- journal log reads
- RPM copy/install on a device
- system and user service management
- Docker/mb2 RPM builds through the local `build-sailfishos` helper
- Jolla OBS result and build-log lookup through `osc`
- repository status and search under the configured git root
- RPM spec metadata summaries
- QML translation search and Sailfish ternary translation checks
The committed defaults are deliberately generic. Device tools default to the
placeholder SSH target `root@device`, the Sailfish user-session bus at
`/run/user/100000/dbus/user_bus_socket`, `~/git` as the local source root, and
the vendored build helper at
`src/sailfish_devel_mcp/vendor/build_sailfishos.py`. Put a config file at
`~/.config/sailfish-devel-mcp/config.json` or pass `--config` to provide your
real device and OBS settings. Device entries can also carry the preferred
user, architecture, and current release label. If an installed SDK is
available, set `paths.local_sdk` to its `sdk-chroot` path; builds will use it
when it has a target matching the requested release and architecture, otherwise
they fall back to the coderus SDK image.
## Running
From a checkout:
```sh
/path/to/sailfish-devel-mcp/bin/sailfish-devel-mcp
```
To inspect the effective configuration:
```sh
/path/to/sailfish-devel-mcp/bin/sailfish-devel-mcp --dump-config
```
Example MCP client configuration:
```json
{
"mcpServers": {
"sailfish-devel": {
"command": "/path/to/sailfish-devel-mcp/bin/sailfish-devel-mcp"
}
}
}
```
## Configuration
Example:
```json
{
"default_device": "phone",
"devices": {
"phone": {
"ssh_target": "root@phone",
"username": "defaultuser",
"architecture": "aarch64",
"release": "live",
"user_bus_runtime_dir": "/run/user/100000",
"user_bus_address": "unix:path=/run/user/100000/dbus/user_bus_socket"
}
},
"paths": {
"git_root": "/home/you/git",
"ssh_config": "/home/you/.ssh/config",
"local_sdk": "/srv/mer/sdks/sfossdk/sdk-chroot",
"osc_api_alias": "your-obs-alias"
}
}
```
## Tool Notes
The server keeps local paths scoped to the configured git root and `/tmp` for
tools that read or write files. Device access still uses SSH, so the usual SSH
prompts, permissions, and command failures are surfaced as tool results.
Mutating tools are annotated as non-read-only:
- `sailfish_device_lipstick_screenshot`
- `sailfish_device_touch`
- `sailfish_device_user_bus_call`
- `sailfish_device_install_rpm`
- `sailfish_device_restart_service`
- `sailfish_build_rpm`
`sailfish_device_lipstick_screenshot` defaults to
`~/Pictures/Screenshots/lipstick-<timestamp>.png` under `/home/<username>`,
where `username` comes from the device config. Lipstick rejects screenshot save
paths outside the home directory. When that directory is missing, the tool
derives ownership with `stat -L`, creates `Pictures` as that owner/group with
mode `775`, and creates `Pictures/Screenshots` as that owner and the
`privileged` group with mode `755` when the group exists.
`sailfish_device_touch` supports `discover`, `tap`, and `swipe`. Discovery
prints `/proc/bus/input/devices` and can also run `evdev_trace -i` when
`include_evdev_trace` is true. Tap and swipe auto-select a likely touchscreen
input event device unless `input_device` is supplied. Coordinates are raw
input/display coordinates, so pair this tool with a current screenshot when
choosing points.
`sailfish_build_rpm` can use a configured device's `architecture` and `release`
as defaults when the call includes `device`. If `paths.local_sdk` is set, the
build helper first checks the installed SDK targets. `live` uses the unversioned
local target for the requested architecture, for example `aarch64`; a named
release such as `5.0.0` uses a matching versioned local target such as
`aarch64-5.0.0`. If the required target is not installed, the helper falls back
to the release-specific coderus Docker SDK image. The wrapper image defaults to
`sailfish-sdk-build-engine:$USER` and can be overridden with
`SAILFISH_SDK_BUILD_ENGINE_IMAGE`.
Read-only tools include the journal, topmost PID, process maps, OBS lookup,
repo search, spec summary, and QML checks.
## Smoke Test
```sh
printf '%s\n' \
'{"jsonrpc":"2.0","id":1,"method":"initialize","params":{"protocolVersion":"2025-06-18","capabilities":{},"clientInfo":{"name":"smoke","version":"0"}}}' \
'{"jsonrpc":"2.0","id":2,"method":"tools/list","params":{}}' \
| /path/to/sailfish-devel-mcp/bin/sailfish-devel-mcp
```
## Development
Run tests without installing the package:
```sh
PYTHONPATH=src python3 -m unittest discover -s tests
```
|
