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Harness browser structured reads

Keyed browser get actions collect exact deterministic values while legacy unkeyed reads remain output-neutral.

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Harness browser structured reads
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Harness browser structured reads
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Keyed browser get actions collect exact deterministic values while legacy unkeyed reads remain output-neutral.

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harness,browser,playwright,structured-output
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public

Keyed reads

Add a non-empty `key` to a browser `get` action to collect its result in the step output. Keyed reads execute in authored order and return a plain object whose keys preserve that order. Values are strings, except a successful `text` read may return `null`.

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`text`, `html`, and `value` require a selector.

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`title` and `url` reject selectors.

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Empty or duplicate keys and unsupported browser methods fail the step without

returning partial output.

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Unkeyed `get` actions remain legacy no-ops and do not create step output.

Harness `json-match` assertions compare this object with exact deep equality; they do not coerce values or ignore missing, extra, or mistyped fields.