Maintain An Existing Project

Start with the existing project tree before you edit anything.

Typical project layout

An inherited truST project usually has this shape:

project/
  runtime.toml
  io.toml
  trust-lsp.toml
  src/
    main.st
    config.st
  hmi/

First steps

1. Open the project without editing anything yet.
2. Inspect the tree and identify src/, runtime.toml, io.toml, and hmi/.
3. Run build and validate before touching code.
4. Inspect the runtime UI or HMI.
5. Change one safe line only.
6. Rerun or redeploy.
7. Verify the effect.

Questions To Answer First

• what does src/main.st control?
• where are %I/%Q bindings defined?
• which runtime URLs/endpoints are enabled?
• is there an HMI folder?
• which driver/backend is configured?

Start with these

• Project Layout
• Build, Validate, Test
• Deploy And Rollback
• Operator Guide

Avoid first:

• Do not start with a blank-folder bootstrap if you already have a project.
• Do not change config and logic in the same first edit.
• Do not deploy before you have a clean build/validate pass.

Next

• Project Layout
• Build, Validate, Test
• Runtime UI And Control
• Deploy And Rollback