DocsWorkflowsComponentsMachinemachine:extension:prompt

machine:extension:prompt

Renders one turn of the authoring loop as a prompt. It exists so a workflow document can run the loop step by step and still ask the model the same question the one-shot machine:extension:author component asks. Nothing about it touches the browser, so a run can render a turn and read it without a bridge.

Options

Name	Type	Description
`goal`	`string`	What the authored workflow should accomplish, in plain language
`observation`	`string`	The current page rendered as text, which is what machine:extension:observe returns
`last_observation`	`string`	The page as it was on the previous turn, so a turn that changed nothing visible is named as one instead of being repeated
`last_result`	`string`	What the previous turn's step returned, which is how the model reads prose an observation does not carry
`steps`	`[]Step`	The steps the session has accepted so far, in order
↳ `id`	`string`	Uniquely names the step within its workflow, echoed on its StepResult.
↳ `type`	`string`	Is the action to perform (click, fill, select, captureUrl, ...).
↳ `label`	`string`	Is a human-readable description shown in run progress UIs.
↳ `selector`	`Selector`	Picks the DOM node(s) the step acts on.
↳ `css`	`string`	Is a CSS selector.
↳ `path`	`string`	Is an explicit DOM path, used when CSS cannot express the target.
↳ `indexes`	`[]int`	Narrows a multi-match selector to these positions.
↳ `enter`	`[]string`	Names the subtrees CSS has to resolve inside, outermost first. Each entry selects a shadow host or an iframe, resolved in the tree the previous entry opened, so a control inside a web component inside a same-origin frame is reachable by one Selector. Empty runs CSS against the top document.
↳ `index`	`int`	Narrows a multi-match selector to a single position.
↳ `all`	`bool`	Expands the step to act on every match instead of the first.
↳ `value`	`string`	Is the input for value-taking steps such as fill and select. It may contain {{ variable }} placeholders.
↳ `format`	`string`	Names the shape extraction steps return their data in.
↳ `attribute`	`string`	Names the DOM attribute an extraction step reads.
↳ `fields`	`ExtractField`	Are the named columns an extractList step reads out of each item its selector matched. Key order is the column order, and every returned item carries every key.
↳ `limit`	`int`	Caps how many items an extractList step returns. The extension applies its own bound when this is zero, so a listing that lazily grew to ten thousand rows truncates and says so.
↳ `url`	`string`	Is the address for navigation steps.
↳ `fn`	`string`	Names the page function an eval step invokes.
↳ `args`	`[]any`	Are the arguments passed to Fn.
↳ `body_params`	`map[string]string`	Overrides or adds form fields on the request a captureDownload re-issues, and carries the parameters a captureUrl sends, in the query for a GET and form-encoded otherwise.
↳ `method`	`string`	Is the HTTP method a captureUrl step fetches its URL with, defaulting to GET.
↳ `filename`	`string`	Renames a captured file (captureDownload, captureUrl and capturePageFile). It may contain {{ variable }} placeholders.
↳ `output`	`string`	Chooses where a captured file goes, and the controlling client is its only destination.
↳ `wait`	`WaitConfig`	Blocks the step until a page condition holds.
↳ `selector`	`string`	Waits for a matching element to appear (or disappear, see Absent).
↳ `text`	`string`	Waits for this text to be present on the page.
↳ `url_includes`	`string`	Waits for the page URL to contain this substring.
↳ `absent`	`bool`	Flips the wait to expect the selector to disappear rather than appear.
↳ `delay_ms`	`int`	Is a fixed pause in milliseconds, applied on top of any condition.
↳ `timeout_ms`	`int`	Bounds the wait, in milliseconds.
↳ `prompt`	`string`	Is the text shown at a user gate asking for manual input.
↳ `continue_on`	`ContinueCondition`	Holds the step until a user gate is cleared or a page condition is met.
↳ `manual`	`bool`	Pauses the run for an explicit user continue.
↳ `selector`	`string`	Resumes when a matching element appears.
↳ `text`	`string`	Resumes when this text is present on the page.
↳ `url_includes`	`string`	Resumes when the page URL contains this substring.
↳ `timeout_ms`	`int`	Bounds the hold, in milliseconds.
↳ `timeout_ms`	`int`	Overrides the workflow's default step timeout, in milliseconds.
↳ `optional`	`bool`	Lets the run continue when this step fails.
↳ `condition`	`Condition`	Condition, when set, gates the step. If it does not hold, the step is skipped rather than failed.
↳ `selector`	`string`	Holds when a matching element exists on the page.
↳ `text`	`string`	Holds when the page (or the selected element) contains this text.
↳ `url_includes`	`string`	Holds when the page URL contains this substring.
↳ `match`	`string`	Decides how the set predicates combine, "any" or "all".
↳ `negate`	`bool`	Inverts the combined result.
↳ `store`	`string`	Names a slot the step's data is saved under, readable by later steps and returned on the WorkflowResult.
↳ `resume`	`ResumePoint`	Resume, when set, marks this step as a point a re-run may start at, and carries the predicate recognizing a browser already standing there.
↳ `id`	`string`	Names this point so a later point's Rewind can reach it. It is unique within one workflow.
↳ `when`	`Condition`	Recognizes the browser standing at this point.
↳ `selector`	`string`	Holds when a matching element exists on the page.
↳ `text`	`string`	Holds when the page (or the selected element) contains this text.
↳ `url_includes`	`string`	Holds when the page URL contains this substring.
↳ `match`	`string`	Decides how the set predicates combine, "any" or "all".
↳ `negate`	`bool`	Inverts the combined result.
↳ `rewind`	`Rewind`	Rewind, when set, is how the browser leaves this point for an earlier one.
↳ `to`	`string`	Names the resume point this reaches, which must sit earlier in the step list than the point declaring it.
↳ `url`	`string`	Navigates the tab back to the earlier point.
↳ `selector`	`string`	Clicks a control on the current page that leads back, for a flow whose way back is a button rather than an address.
↳ `wait`	`WaitConfig`	Holds until the page has settled after the rewind, before the target point's own predicate is checked again.
↳ `selector`	`string`	Waits for a matching element to appear (or disappear, see Absent).
↳ `text`	`string`	Waits for this text to be present on the page.
↳ `url_includes`	`string`	Waits for the page URL to contain this substring.
↳ `absent`	`bool`	Flips the wait to expect the selector to disappear rather than appear.
↳ `delay_ms`	`int`	Is a fixed pause in milliseconds, applied on top of any condition.
↳ `timeout_ms`	`int`	Bounds the wait, in milliseconds.
↳ `always`	`bool`	Runs the step even when re-entry starts the run past it, for work the page cannot report as already done.
`variables`	`map[string]string`	The {{ }} placeholders the authored workflow may use, name to description
`last_error`	`string`	Why the previous turn's step failed, fed back so the model corrects against the page
`repairing`	`[]Step`	The steps of the fragment being repaired, absent on a first authoring
↳ `id`	`string`	Uniquely names the step within its workflow, echoed on its StepResult.
↳ `type`	`string`	Is the action to perform (click, fill, select, captureUrl, ...).
↳ `label`	`string`	Is a human-readable description shown in run progress UIs.
↳ `selector`	`Selector`	Picks the DOM node(s) the step acts on.
↳ `css`	`string`	Is a CSS selector.
↳ `path`	`string`	Is an explicit DOM path, used when CSS cannot express the target.
↳ `indexes`	`[]int`	Narrows a multi-match selector to these positions.
↳ `enter`	`[]string`	Names the subtrees CSS has to resolve inside, outermost first. Each entry selects a shadow host or an iframe, resolved in the tree the previous entry opened, so a control inside a web component inside a same-origin frame is reachable by one Selector. Empty runs CSS against the top document.
↳ `index`	`int`	Narrows a multi-match selector to a single position.
↳ `all`	`bool`	Expands the step to act on every match instead of the first.
↳ `value`	`string`	Is the input for value-taking steps such as fill and select. It may contain {{ variable }} placeholders.
↳ `format`	`string`	Names the shape extraction steps return their data in.
↳ `attribute`	`string`	Names the DOM attribute an extraction step reads.
↳ `fields`	`ExtractField`	Are the named columns an extractList step reads out of each item its selector matched. Key order is the column order, and every returned item carries every key.
↳ `limit`	`int`	Caps how many items an extractList step returns. The extension applies its own bound when this is zero, so a listing that lazily grew to ten thousand rows truncates and says so.
↳ `url`	`string`	Is the address for navigation steps.
↳ `fn`	`string`	Names the page function an eval step invokes.
↳ `args`	`[]any`	Are the arguments passed to Fn.
↳ `body_params`	`map[string]string`	Overrides or adds form fields on the request a captureDownload re-issues, and carries the parameters a captureUrl sends, in the query for a GET and form-encoded otherwise.
↳ `method`	`string`	Is the HTTP method a captureUrl step fetches its URL with, defaulting to GET.
↳ `filename`	`string`	Renames a captured file (captureDownload, captureUrl and capturePageFile). It may contain {{ variable }} placeholders.
↳ `output`	`string`	Chooses where a captured file goes, and the controlling client is its only destination.
↳ `wait`	`WaitConfig`	Blocks the step until a page condition holds.
↳ `selector`	`string`	Waits for a matching element to appear (or disappear, see Absent).
↳ `text`	`string`	Waits for this text to be present on the page.
↳ `url_includes`	`string`	Waits for the page URL to contain this substring.
↳ `absent`	`bool`	Flips the wait to expect the selector to disappear rather than appear.
↳ `delay_ms`	`int`	Is a fixed pause in milliseconds, applied on top of any condition.
↳ `timeout_ms`	`int`	Bounds the wait, in milliseconds.
↳ `prompt`	`string`	Is the text shown at a user gate asking for manual input.
↳ `continue_on`	`ContinueCondition`	Holds the step until a user gate is cleared or a page condition is met.
↳ `manual`	`bool`	Pauses the run for an explicit user continue.
↳ `selector`	`string`	Resumes when a matching element appears.
↳ `text`	`string`	Resumes when this text is present on the page.
↳ `url_includes`	`string`	Resumes when the page URL contains this substring.
↳ `timeout_ms`	`int`	Bounds the hold, in milliseconds.
↳ `timeout_ms`	`int`	Overrides the workflow's default step timeout, in milliseconds.
↳ `optional`	`bool`	Lets the run continue when this step fails.
↳ `condition`	`Condition`	Condition, when set, gates the step. If it does not hold, the step is skipped rather than failed.
↳ `selector`	`string`	Holds when a matching element exists on the page.
↳ `text`	`string`	Holds when the page (or the selected element) contains this text.
↳ `url_includes`	`string`	Holds when the page URL contains this substring.
↳ `match`	`string`	Decides how the set predicates combine, "any" or "all".
↳ `negate`	`bool`	Inverts the combined result.
↳ `store`	`string`	Names a slot the step's data is saved under, readable by later steps and returned on the WorkflowResult.
↳ `resume`	`ResumePoint`	Resume, when set, marks this step as a point a re-run may start at, and carries the predicate recognizing a browser already standing there.
↳ `id`	`string`	Names this point so a later point's Rewind can reach it. It is unique within one workflow.
↳ `when`	`Condition`	Recognizes the browser standing at this point.
↳ `selector`	`string`	Holds when a matching element exists on the page.
↳ `text`	`string`	Holds when the page (or the selected element) contains this text.
↳ `url_includes`	`string`	Holds when the page URL contains this substring.
↳ `match`	`string`	Decides how the set predicates combine, "any" or "all".
↳ `negate`	`bool`	Inverts the combined result.
↳ `rewind`	`Rewind`	Rewind, when set, is how the browser leaves this point for an earlier one.
↳ `to`	`string`	Names the resume point this reaches, which must sit earlier in the step list than the point declaring it.
↳ `url`	`string`	Navigates the tab back to the earlier point.
↳ `selector`	`string`	Clicks a control on the current page that leads back, for a flow whose way back is a button rather than an address.
↳ `wait`	`WaitConfig`	Holds until the page has settled after the rewind, before the target point's own predicate is checked again.
↳ `selector`	`string`	Waits for a matching element to appear (or disappear, see Absent).
↳ `text`	`string`	Waits for this text to be present on the page.
↳ `url_includes`	`string`	Waits for the page URL to contain this substring.
↳ `absent`	`bool`	Flips the wait to expect the selector to disappear rather than appear.
↳ `delay_ms`	`int`	Is a fixed pause in milliseconds, applied on top of any condition.
↳ `timeout_ms`	`int`	Bounds the wait, in milliseconds.
↳ `always`	`bool`	Runs the step even when re-entry starts the run past it, for work the page cannot report as already done.
`broken_step`	`string`	The id of the step of that fragment which stopped working
`broken_reason`	`string`	Why that fragment stopped holding up, which is what the repair has to fix

Outputs

Name	Type	Description
`system`	`string`	The standing instructions, which say what a step may be and how a ref is named
`user`	`string`	This turn, which is the goal, the accepted steps, the page and the last failure
`text`	`string`	Both messages in one string, for a model call that takes a single prompt

Example

Renders one turn of the authoring loop and asks a model for the next step. It is the middle of the api registry's aweehub/web/author-turn document, shown on its own so the shape of a turn is readable without the recursion.

name: Ask a model for the next browser step
connections:
  - name: openrouter
    provider: openrouter

actions:
  - name: look
    component: machine:extension:observe
    vars:
      url: https://example.com/login

  - name: turn
    component: machine:extension:prompt
    vars:
      goal: Log in with the email address and password the run supplies.
      observation: "{{ look.text }}"
      variables:
        email: the account's email address
        password: the account's password

  - name: decide
    component: llm:generate
    connection: openrouter
    vars:
      provider: openrouter
      model: anthropic/claude-sonnet-5
      prompt: "{{ turn.text }}"
      max_tokens: 2048
      temperature: 0

outputs:
  decision: "{{ decide.content }}"

Edit or read the source on GitHub