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Vibe Coding2026-08-29 · source-backed
Claude Code 2.1.251 fixes checks that auto-approved commands assigning an arithmetic expression to an integer shell variable, naming OPTIND=1/0 and RANDOM=2+2. Both now prompt. The same release changes how Bash command output files are created and read back in the sandbox so a sandboxed command can't redirect or replace them. Parser-level gaps where the shape of a command, not its effect, decided whether it needed approval. (Claude Code Changelog)
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v2.1.218 took dangerous-rm, background-&, and suspicious-Windows-path checks out of permission dialogs, and stopped prompting in plan mode for Bash the static analyzer can't prove read-only. /deep-research also now starts only when you invoke it. Fewer interrupts, but a model...
The changelog shows sandbox filesystem deny entries being bypassed on Linux and macOS: specifically, denyRead: "~/.aws/" written with a trailing slash was silently ignored. That follows the zsh regex bypass, the PreToolUse auto-allow bypass, and the tabs/invisible-Unicode prom...
Two things in one release, and only one of them is in the security section. CLAUDE_CODE_SUBAGENT_MODEL used to override the model for every subagent. In 2.1.251 it sets the default instead. An agent definition's model: frontmatter now wins, and so does an explicit per-spawn mo...
One Claude Code release fixed two independent permission-check bypasses on the same day. That's the story. Version 2.1.221, shipped August 4, patches a Bash tool bypass where zsh could execute hidden commands embedded inside [[ ]] regex conditionals. The approval prompt never...
The changelog for Aug 4–6 is an unusually dense run: a crafted Bash command could hide parts of itself from permission checks, tab padding and invisible Unicode could hide text from the approval dialog, workflow scripts escaped their sandbox via dynamic import(), and agent def...
The August 7 release adds claude self-hosted-runner so Team/Enterprise customers can host web, mobile and desktop sessions on their own machines or containers, plus cross-session SendMessage/ListAgents so sessions on any of your machines can message each other (macOS and Linux...
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