Claude Code version 2.1.152 shipped today, May 27. Per Claude Code’s official changelog, /simplify returns — but not as the original command. The release adds a new --fix flag to /code-review and routes the old /simplify invocation through it. The changelog’s exact wording: “/code-review --fix now applies review findings to your working tree after the review, surfacing reuse, simplification, and efficiency suggestions; /simplify now invokes /code-review --fix.” Six days earlier, Claude Code 2.1.147 (May 21) had removed /simplify entirely.
What else changed in 2.1.152
Two policy bullets stand out alongside the alias. The first: “Auto mode no longer requires opt-in consent.” The second: “Claude Code now switches to your configured --fallback-model for the rest of the session when the primary model is not found, instead of failing every request.” Both change how the tool runs at boundaries that previously stopped or asked.
Skill and hook primitives
The release adds skill subtraction and display-time gating. Skills and slash commands can set disallowed-tools in frontmatter to remove tools from the model while the skill is active. A new /reload-skills command rescans skill directories without a session restart; SessionStart hooks can return reloadSkills: true to trigger the same rescan and hookSpecificOutput.sessionTitle to label the session. A new MessageDisplay hook event lets hooks transform or hide assistant message text as it is rendered. A pluginSuggestionMarketplaces managed setting joins the existing managed-config surface.
The /usage breakdown grows a column
The /usage breakdown introduced in 2.1.149 now includes large session files; the changelog notes that files are scanned with a streaming read so memory usage stays flat. The category list grew one entry inside seven days — direct corroboration of the prediction in the bill finally itemized.
The reframe — that the loud rename is the surface and the quiet opt-in deletion is the news — is taken up in the opt-in that quietly disappeared. The release this one partly walks back is Claude Code’s /simplify becomes /code-review. The earlier post predicting this direction was from fix to report.
