Add August 21 changelog entry

[eclairen]

Summary

Adds the August 21 changelog entry, verified line by line against the merged PRs and shipped code rather than the draft list.

Six product bullets and seven documentation bullets. Relative to the draft, four items were dropped and two were adjusted:

Dropped — not shipped

• Humanized computer-use interaction endpoints. The only merged humanization (Bezier mouse movement, smooth typing, Gaussian jitter) landed in February–April and was announced then. The broader work is still an unmerged planning document, and the current implementation issues multiple xdotool calls per request, so the "single call, no added latency" claim does not hold either.
• Browser Loop release. The publishable package is @onkernel/browser-loop, not @onkernel/loop, and nothing is on npm yet — no releases cut, repository not yet renamed. The most recent published package is still @onkernel/cua-agent 0.10.0. Worth announcing once the first publish lands, including the CLI retirement, which is a larger breaking change than the agent-class retirement.
• Chromium 152.0.7977.42. That is the Chrome for Testing build in the open-source browser images. Production images pin our Chromium fork at v150.0.7871.114-r3, which overrides that install, so no customer-visible version changed this week.
• Fast extension upload endpoint. Merged and present in the current image, but no control-plane path reaches it — the customer-facing upload endpoint still restarts Chromium. Internal only for now.

Adjusted

• Org entitlements now covers the API only. The matching CLI command is merged but not in a released build (latest tag is v0.31.0, cut before it merged). Happy to add the CLI half back if v0.32.0 ships before this publishes.
• Browser telemetry keeps proxy_error and cdp_command, both fully wired through to the events API. The captcha task-start and challenge-result events are dropped: only the schema merged, and the producer that emits them is still open, so no session emits them today.
• Browser sizes became an accurate memory bullet. The shipped API takes 8GiB (default) or 16GiB on create, headful and non-GPU only — there is no M/L/XL naming and no storage dimension.

Added

• Automatic proxy cleanup on the product side, which is what the new documentation describes.
• A CLI bullet for v0.30.0–v0.31.0, including the browsers list column reorder, which breaks scripts that parse that table positionally.

Two link fixes carried over from the draft: the Foreman guide lives at /integrations/vercel/foreman, and the telemetry bullet points at /browsers/telemetry/overview rather than the stealth page.

Test plan

• Verified every link in the new entry resolves to a page in this repo
• Confirmed GET /org/entitlements and /telemetry/destinations return 401 rather than 404 in production, so both are live
• Did not run mintlify dev (network-restricted here); the entry reuses the exact structure of the existing entries and changes no other file

Follow-ups, not in this PR

• Browser memory is undocumented — no page mentions 8GiB or 16GiB, so the feature ships without docs.
• The telemetry categories table is missing proxy_error and cdp_command.
• The fingerprint-coherence improvements announced on August 14 were reverted in the browser fork. Images still pin the revision that has them, so behavior is unchanged today, but this will need a correction once the fleet picks up the newer revision.

🤖 Generated with Claude Code

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Note

Low Risk
Documentation-only changelog text; no product, API, or security code is changed.

Overview
Adds an August 21 changelog entry at the top of changelog.mdx.

Product notes cover org entitlements (GET /org/entitlements), optional 16GiB browser memory, customer-configurable OTLP export, proxy_error / cdp_command telemetry, automatic unused-proxy cleanup, and CLI v0.30.0–v0.31.0 (including a browsers list column-order break). Docs notes cover Foreman, replay iframe embedding, telemetry retention, proxy cleanup, Chrome PDF, deploy keys, and Stagehand v4.

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[cursor]

Risk assessment: Very Low

Verdict: Approve.

This PR inserts a new August 21 <Update> block at the top of changelog.mdx (+21 lines, 0 deletions). No other files change.

Why this is Very Low

• Codepaths: Public changelog copy only. No application logic, APIs, auth, billing, or infrastructure.
• Blast radius: Isolated to the docs changelog page. Structure matches existing weekly entries (<Update> with Product / Docs sections).
• Complexity: Additive markdown/MDX text; no new components, config, or navigation changes.
• Operational / security impact: None. Linked paths (/integrations/vercel/foreman, /browsers/telemetry/overview, /browsers/replays, /proxies/overview, /integrations/stagehand) already exist in the repo.

No CODEOWNERS file is present, and there are no existing reviews on this PR.

  

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