Quickstart

This repository ships the visionOS build MCP server. Follow these steps to install seiro-mcp, register it with Codex, create a project-local seiro-mcp.toml, and call the visionOS tools from an MCP client.

Prerequisites

• macOS 15 Sequoia or later for real visionOS builds
• Xcode 16+ with visionOS / visionOS Simulator SDK
• Rust 1.91.1 (rustup override set 1.91.1)
• cargo, git, bash/zsh
• An MCP client (Codex CLI or official Inspector)

Installation

If DevToolsSecurity is disabled, enable it first:

DevToolsSecurity -status
sudo DevToolsSecurity -enable

Install the binary:

cargo install seiro-mcp --locked

For manual testing from a local checkout, install the current working tree instead:

cd /path/to/seiro-mcp
cargo install --path . --locked --force

This builds the local source with the locked dependencies and overwrites the installed seiro-mcp binary, usually at ~/.cargo/bin/seiro-mcp. Use it when you need Codex or Inspector to exercise unmerged local changes through the normal seiro-mcp command.

Verify which binary is active:

which seiro-mcp
seiro-mcp --version
seiro-mcp config mcp

To return to the published crates.io build later:

cargo install seiro-mcp --locked --force

Codex MCP registration

Print the Codex-side MCP registration snippet:

seiro-mcp config mcp

Paste the output into Codex config (~/.codex/config.toml):

[mcp_servers.seiro_mcp]
command = "/Users/<user>/.cargo/bin/seiro-mcp"

Project config

From the target project root:

seiro-mcp config project

This creates seiro-mcp.toml:

[visionos]
allowed_paths = []
allowed_schemes = []
xcode_path = "/Applications/Xcode.app/Contents/Developer"

For a non-default config location, pass MCP_CONFIG_PATH from your MCP client or use --config when launching manually through a client.

Optional: install bundled skill

seiro-mcp skill install --dry-run
seiro-mcp skill install

• Use seiro-mcp skill remove seiro-mcp-visionos-build-operator to remove it.
• The canonical skill source in this repository is .agents/skills/seiro-mcp-visionos-build-operator/.
• seiro-mcp skill install defaults to seiro-mcp-visionos-build-operator. Passing the skill name explicitly is still supported.
• seiro-mcp skill install only installs the bundled skill into the local Codex skills directory. It does not install the Seiro MCP server binary and does not configure MCP settings.

Alternative GitHub install path for Codex skill-installer:

• --repo karad/seiro-mcp
• --path .agents/skills/seiro-mcp-visionos-build-operator

Contributor build checks

If you are contributing to this repository, run:

cargo fetch
cargo check
cargo test --all -- --nocapture
cargo fmt -- --check
cargo clippy -- -D warnings
cargo build --release
cargo package --list
cargo publish --dry-run

Additional repository checks:

cargo run -p xtask -- langscan
cargo run -p xtask -- docs-langscan
cargo run -p xtask -- check-docs-links

Launch via MCP client

The MCP client must spawn the server as a child process and perform the RMCP handshake over stdio. Running cargo run directly without a client will fail with MCP_CLIENT_REQUIRED.

Inspector example:

npx @modelcontextprotocol/inspector seiro-mcp

If you are developing from source, replace seiro-mcp with target/release/seiro-mcp.

Validate sandbox policy before building

mcp call validate_sandbox_policy '{
    "project_path": "/Users/<user>/codex/workspaces/vision-app",
    "required_sdks": ["visionOS", "visionOS Simulator"],
    "xcode_path": "/Applications/Xcode.app/Contents/Developer"
}'

• If status: "ok", proceed to build_visionos_app.
• If status: "error" or an MCP error, inspect the code and diagnostics.

Optional SDK inspection:

mcp call inspect_xcode_sdks '{
    "required_sdks": ["visionOS", "visionOS Simulator"],
    "xcode_path": "/Applications/Xcode.app/Contents/Developer"
}'

Optional scheme preflight:

mcp call inspect_xcode_schemes '{
    "project_path": "/Users/<user>/codex/workspaces/VisionApp/VisionApp.xcodeproj",
    "xcode_path": "/Applications/Xcode.app/Contents/Developer"
}'

If project_path is omitted, resolution order is:

1. .xcodeproj discovered in current working directory
2. visionos.default_project_path from seiro-mcp.toml

Build and fetch artifacts

mcp call build_visionos_app '{
    "project_path": "/Users/<user>/codex/workspaces/VisionApp/VisionApp.xcodeproj",
    "scheme": "VisionApp",
    "destination": "platform=visionOS Simulator,name=Apple Vision Pro",
    "configuration": "debug",
    "extra_args": ["-quiet"]
}'

If build fails and returns job_id, inspect diagnostics:

mcp call inspect_build_diagnostics '{
    "job_id": "<UUID returned in build error context>",
    "include_log_excerpt": true,
    "prefer_typecheck": true
}'

Fetch artifacts:

mcp call fetch_build_output '{
    "job_id": "<UUID returned by build_visionos_app>",
    "include_logs": true
}'

Startup mode

• Seiro MCP currently supports the local stdio MCP workflow.
• Token setup is not required for the default local Codex workflow.
• TCP is not part of the supported workflow. If it returns later, it should be redesigned as a separate remote/server mode.

Troubleshooting

Symptom	Resolution
Config file missing	Run seiro-mcp config project in the project root, or set MCP_CONFIG_PATH to an absolute seiro-mcp.toml path.
MCP_CLIENT_REQUIRED	Launch via an MCP client instead of running cargo run directly.
path_not_allowed	Add the project's parent directory to visionos.allowed_paths, or use allowed_paths = [] for local development.
sdk_missing	Check details.diagnostics, run inspect_xcode_sdks, then install/fix SDK settings and retry.
scheme_not_allowed	Add the scheme to visionos.allowed_schemes, or use allowed_schemes = [] for local development.
artifact_expired	Call fetch_build_output sooner or raise artifact_ttl_secs.

Logs and telemetry

• RUST_LOG=debug enables verbose tracing.
• visionOS jobs use the rmcp_sample::visionos target and record job_id, status, and elapsed_ms (see docs/telemetry.md).