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feat(core): make execute_javascript honor AbortSignal

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Expose the task AbortSignal as `signal` in the script scope so cooperative
code can cancel promptly, and re-check signal.throwIfAborted() after the
script settles to discard stale results.

Closes #537.
This commit is contained in:
Simon
2026-06-09 21:30:27 +08:00
parent 73810b3ed8
commit 9ed0a09194
3 changed files with 17 additions and 10 deletions
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9
packages/core/src/tools/index.ts
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@@ -181,12 +181,15 @@ tools.set(
'execute_javascript',
tool({
description:
'Execute JavaScript code on the current page. Supports async/await syntax. Use with caution!',
'Execute JavaScript code on the current page. Supports async/await syntax. Use with caution! ' +
'An `AbortSignal` named `signal` is available in scope: long-running async code MUST honor it ' +
'(e.g. `await fetch(url, { signal })`, or `signal.throwIfAborted()` in loops)',
inputSchema: z.object({
script: z.string(),
}),
execute: async function (this: PageAgentCore, input) {
const result = await this.pageController.executeJavascript(input.script)
execute: async function (this: PageAgentCore, input, { signal }) {
const result = await this.pageController.executeJavascript(input.script, signal)
signal.throwIfAborted()
return result.message
},
})