[omartelo]

Summary

After a click that starts a fetch, an agent re-reads the session browser with browser_info until the result shows. browser_info now takes two optional parameters so it can wait once instead:

• wait_for: text that should appear
• wait_gone: text that should disappear

Both are a case-sensitive substring of the page's visible text (document.body.innerText, the whole page, not only the viewport). The read polls every 100 ms (textPoll) for up to 20 s (maxTextWait, which leaves the page read its own pageWait under the client's 60 s openCall). On timeout it answers the page anyway with a wait: timed out, this is the page as it stands line, not an error. A read failing mid-wait (the page between two documents after a navigating click) counts as not yet; a Chrome that died ends the wait and the page read reports it. Without the parameters, behavior is unchanged. No new MCP tool; browser_info stays read-only. The CLI's lich browser info takes no flags today, so it does not mirror these.

The timeout line is English and outside the i18n catalog, like every other page-answer line (url:, downloaded:, ...).

Contract

• browser.Info takes the new api.BrowserInfoOptions (id, waitFor, waitGone) instead of SessionIDOptions; BrowserPageInfo gains waitTimedOut. api/testdata/contract.golden updated.
• Page gains HasText. The three existing test calls to Service.Read (session_downloads_test.go, downloads_live_test.go) change only their options type: the contract changed.

Test plan

• internal/browser/wait_test.go (fake page): text appears on the third read, text goes on the second, case-sensitive miss times out within the shortened bound and still answers the page, no params reads no text, a Chrome dying mid-wait stops the wait.
• internal/browser/wait_live_test.go (skips without a Chromium-family browser): a page writes Saved over Loading 300 ms after load, below the fold; wait_for and wait_gone both see it, and a case-mismatched wait times out with the page answered. 10/10 with -race.
• internal/cli: the timeout line sits after the title.
• Local gate: gofmt -l ., go vet ./..., go test ./... green; native/ gofmt, go vet ./..., go build ./... green.