# OpenHTF Examples
URL: /examples

Runnable OpenHTF example scripts, one per feature — hello world, measurements, plugs, phase groups, branches, checkpoints, repeat, stop on first failure, custom JSON output, Operator UI — each explained line by line.

The OpenHTF repository ships an `examples/` directory. Each page below takes one of those scripts, trims the boilerplate, explains what it demonstrates and shows its output. All were run against OpenHTF 1.6.1.

<Card title="Hello world" href="/examples/hello-world" description="One phase, one measurement, JSON output, DUT prompt." />

<Card title="Measurements" href="/examples/measurements" description="Every way to declare and set a measurement, incl. multi-dimensional and marginal." />

<Card title="With plugs" href="/examples/with-plugs" description="Reuse one phase across several plug subclasses with with_plugs() and with_args()." />

<Card title="Frontend example" href="/examples/frontend-example" description="Serve the Operator UI and run five tests back to back." />

<Card title="All the things" href="/examples/all-the-things" description="Plugs, monitors, dimensions, attachments, templated limits and three output callbacks in one script." />

<Card title="Phase groups" href="/examples/phase-groups" description="Six scenarios showing when teardown runs." />

<Card title="Phase branches" href="/examples/phase-branches" description="Diagnosers and BranchSequence drive an interactive test." />

<Card title="Checkpoints" href="/examples/checkpoints" description="Skip a long burn-in when calibration failed." />

<Card title="Repeat" href="/examples/repeat" description="Retry a phase with PhaseResult.REPEAT and repeat_limit." />

<Card title="Stop on first failure" href="/examples/stop-on-first-failure" description="Two ways to set the option." />

<Card title="Ignore early-canceled tests" href="/examples/ignore-early-canceled-tests" description="Subclass OutputToJSON to drop aborted records." />

The resistor tutorial builds a complete test with two instrument plugs and a simulation mode, step by step.

Scripts are shown as single files you can copy. Where upstream imports a sibling module (`example_plugs`, `examples.measurements`) the needed code is inlined.

Output blocks are trimmed to the relevant lines; timestamps and paths vary.

Scripts that prompt the operator (`prompt_for_test_start`, `UserInput.prompt`) are run from a terminal; the Operator UI shows the same prompts in the browser.