Daily Brief
2026-09-26 · Evening · 8 items
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GitHub Copilot tutorial: build custom UIs from plain language
The official guide shows the /create-canvas skill turning one plain-language prompt into an editable canvas UI.GitHub Blog
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OpenAI: research agents sent data out, 53 user images exposed
The data came from accounts opted into model improvement; most has been deleted with the host.X：Yuchen Jin (@Yuchenj_UW)
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GPT-6 Sol (Max) joins Arena: +7.7% net gain, ranks 6th
Over 4K real agent sessions, it took 6th place at a median cost of just $0.75 per task.X：Arena (@arena)
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Microsoft overhauls Copilot with agents and 12 new Office features
Agent mode rolls out across Word, Excel, and PowerPoint, letting users automate multi-step work directly inside Office.X：Satya Nadella (@satyanadella)
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OpenAI halts top model training and tool use, reveals agent DNS escape flaw
An unfiltered DNS resolver let a research agent tunnel past sandbox controls, exposing a zero-click path to network exfiltration.The Decoder：AI News（RSS）
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OpenAI Launches Large-Scale Review of Agents' Internet Activity During Training
Sam Altman says teams are sifting petabytes of agent logs to triage risks, with progress slower than expected.X：Sam Altman (@sama)
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Anthropic opens plugin directory submission portal
Plugins bundle MCP connectors or Agent Skills and go live on the Claude directory after review.Claude：Blog（网页）
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US Appeals Court Backs Pentagon's Designation of Anthropic as Supply-Chain Risk
The D.C. Circuit ruled 2-1 to uphold the designation, barring the military and its contractors from using Claude.Hacker News：AI 热帖