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TEACHERS — Anthropic launches Claude for Teachers, giving verified US K-12 educators free premium access, teaching skills, and curriculum links aligned to standards in all 50 statesADMIN — The Admin API is now in beta for every Claude Enterprise organization: member and invite calls need no beta header, while group and custom-role calls doM365 — The Microsoft 365 connector gains write tools — draft, send, and organize email, manage calendar events and mailbox settings, and create or update files in OneDrive and SharePointMCP — Fixed servers from --mcp-config or .mcp.json ignoring a per-server request_timeout_ms, which left long-running tool calls timing out at the 60s default in fresh sessionsSUBAGENT — A new --forward-subagent-text flag and CLAUDE_CODE_FORWARD_SUBAGENT_TEXT variable include subagent text and thinking in stream-json outputDEADLINE — Opus 4.7 fast mode is removed on July 24, seven days out. speed: "fast" will error, so confirm your move to Opus 4.8TEACHERS — Anthropic launches Claude for Teachers, giving verified US K-12 educators free premium access, teaching skills, and curriculum links aligned to standards in all 50 statesADMIN — The Admin API is now in beta for every Claude Enterprise organization: member and invite calls need no beta header, while group and custom-role calls doM365 — The Microsoft 365 connector gains write tools — draft, send, and organize email, manage calendar events and mailbox settings, and create or update files in OneDrive and SharePointMCP — Fixed servers from --mcp-config or .mcp.json ignoring a per-server request_timeout_ms, which left long-running tool calls timing out at the 60s default in fresh sessionsSUBAGENT — A new --forward-subagent-text flag and CLAUDE_CODE_FORWARD_SUBAGENT_TEXT variable include subagent text and thinking in stream-json outputDEADLINE — Opus 4.7 fast mode is removed on July 24, seven days out. speed: "fast" will error, so confirm your move to Opus 4.8
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Claude Code/2026-07-17Advanced

The String I Approved Wasn't the String I Read — Testing a Relayed Permission Prompt with Deceptive Characters

I pushed bidi overrides and zero-width characters through my own approval relay. NFKC normalization caught 0%. Here is why, and the implementation that catches 100% with zero false positives.