docs: draft changelog #038

[hussufo]

docs: draft changelog #38

Generated content/docs/changelog/changelog-038.mdx.

• Window: 2026-09-25T13:17:53.102Z to 2026-10-02T13:19:47.276Z
• Window source: state
• Timezone reference: America/Toronto
• The MDX draft is intentionally clean. Commit references for kept and dropped items are listed below for review.
• Cover image: /images/changelog/38.png (the undithered original is in the run artifacts for palette retries)
• Cover motif: A conservator opens a set of tall shutters in a gallery while visitors choose between two adjoining exhibition rooms.

Monitored repositories

• 0xnenlabs/steel@release (direct)
• steel-dev/steel-browser@main (derived from the application release)
• steel-dev/steel-cookbook@main (direct)
• steel-dev/pi-steel@main (direct)
• steel-dev/leaderboard@main (direct)
• steel-dev/cli@main (direct)
• steel-dev/docs@main (direct)

Included items

⭐ New

• Light theme: The dashboard now supports Light, Dark, and System themes from the account menu, with the selected theme applied across authentication, billing, charts, and code blocks. 0xnenlabs/steel 1b80171
• The Sessions API now accepts recordings: false to keep live streaming enabled without saving a session recording. 0xnenlabs/steel 4872fe9
• Computer desktops now support pasting content from your local clipboard. 0xnenlabs/steel 9732570

🔧 Improvements

• Billing now sends notifications when a budget cap is reached, a prepaid balance is depleted or low, or a payment requires additional action. 0xnenlabs/steel ea27364
• New and rotated API keys are now shown once, while saved keys use a masked preview in Quickstart and API key settings. 0xnenlabs/steel b7a94ff 0xnenlabs/steel 6ba9bc6 0xnenlabs/steel cad97d4
• The console can now export logs, agent logs, and agent traces individually or together in JSON or CSV. 0xnenlabs/steel a54884c
• Managed browser sessions now run Chromium 154 with updated desktop and mobile fingerprints. 0xnenlabs/steel a8d92e9
• The leaderboard added Gemini 4 Argon to OSWorld 2.0 and MiMo V2.6 Pro and Flash to OSWorld-Verified. steel-dev/leaderboard 185209d steel-dev/leaderboard 6a7a1d2

🐛 Bug Fixes

• Fixed API memory growth caused by slow WebSocket consumers and unbounded registry and unreachable-session caches. 0xnenlabs/steel 771141d
• Fixed legacy browsers continuing to run outside an organization's concurrency limit after the API had timed out their session creation. 0xnenlabs/steel 8750eb7
• Fixed mobile emulation so viewport dimensions, client hints, and touch capabilities match the selected device. 0xnenlabs/steel e404ca2 steel-dev/steel-browser dacea7e
• Browser action endpoints now reject unsupported schemes, localhost, and non-public destinations before allocating a browser. 0xnenlabs/steel f0b90e0
• Fixed Steel CLI browser commands parsing --session after text values, and named sessions now fail clearly instead of silently starting a different session when their daemon is unavailable. steel-dev/cli 6ea1953
• Fixed completed onboarding questionnaires appearing again when the production feature flag was disabled. 0xnenlabs/steel 52ac1b9
• Disabled Chrome's password leak warning in managed browsers so its native dialog no longer interrupts automated login flows. 0xnenlabs/steel cec36ef

Source filtering

• Commits collected: 60 (1 skipped as an automated author before grouping)
• Logical changes: 56 (48 eligible, 8 excluded, 0 unaccounted)
• Full ledger: scripts/changelog/audit/038.json in this pull request
• Private sources keep their links and SHAs here but not their titles, subjects, or paths.

Needs review (4)

A heuristic rule dropped each of these. Confirm none of them belongs in the changelog.

• internal_only 0xnenlabs/steel #2103 (1 commit, 9 files)
• internal_only 0xnenlabs/steel #2129 (1 commit, 9 files)
• benchmark_maintenance steel-dev/leaderboard #66: feat(data): Add GPT-6.1 Sol score (2 commits, 2 files)
• benchmark_maintenance steel-dev/leaderboard #67: feat(data): Add Sonnet 5.5 DRACO score (2 commits, 3 files)

Structurally excluded (4)

• submodule_pointer_only 0xnenlabs/steel #2114 (1 commit, 1 file)
• ignored_files_only 0xnenlabs/steel #2145 (1 commit, 3 files)
• ignored_files_only 0xnenlabs/steel #2148 (1 commit, 1 file)
• self_generated steel-dev/docs #137: docs: draft changelog docs(files-api): update examples for file API changes #37 (1 commit, 5 files)

Discarded while drafting (4)

• private source (The fingerprint changes were reverted in the same release, and the remaining CDP stealth change is gated for testing.) 0xnenlabs/steel 86b1c5a 0xnenlabs/steel f0db36a 0xnenlabs/steel 7c71f76 0xnenlabs/steel 8c94f8a
• private source (These are internal maintenance changes without a distinct user-facing behavior change.) 0xnenlabs/steel 97e29e4
• private source (These changes affect internal release and build infrastructure rather than the product experience.) 0xnenlabs/steel 340631b 0xnenlabs/steel 346c759 0xnenlabs/steel f225cfc 0xnenlabs/steel 927df3c
• private source (The work improves internal analytics and request logging without changing supported product behavior.) 0xnenlabs/steel 0967e43

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Project	Deployment	Actions	Updated
docs	Ready	Preview	Oct 7, 2026 9:36am UTC

[nibzard]

Reviewed: removed internal items, tightened prose, gave session recordings its own heading.