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Merge Browser Computer Use into main with Playwright-based open, observe, semantic action, wait, assertion, reporting and close operations.
Return a fresh content-addressed screenshot, DOM-derived refs, diagnostics and stale-state-bound stateId after every browser step.
Add native Harness settings for browser enablement, installed Edge/Chrome selection, executable path, locale, timing, viewport and observation limits.
Raise the default base/clarification budgets to 16,384/8,192 tokens.
Add 8K, 16K, 32K, 64K and 128K suggestions, unrestricted provider-managed output, and unbounded safe-integer custom token values.
Omit maxTokens entirely in unrestricted mode so the selected model/Provider owns its effective output ceiling.
Make Browser Computer Use opt-in by default so ordinary text/vision sessions receive no Browser tool or prompt overhead.
Process only images introduced in the current request segment; historical images make zero automatic vision calls and are represented by a bounded number of compact hash-bound references.
Compact historical Browser DOM/OCR states to a bounded recent window instead of repeatedly forwarding every full state and screenshot.
Preserve original image events and attachment bytes while replacing processed image blocks on the model-facing session Surface, allowing direct selection of native text-only models such as DeepSeek V4 Flash.
Add the session-scoped deepseekeyes_look tool so a native text model can request one precise reread from the preserved original attachment without enabling visual overhead in unrelated sessions.
Fit final-model output to the resolved context window and retry one provider-reported context overflow with the exact safe capacity.
Apply browser settings live, close stale sessions after launch-setting changes, and keep the existing final-model/vision-model GUI routing.
Preserve screenshots and JSON reports under the configured DSH evidence directory and reject stale actions before page mutation.