Unclear It is not confirmed whether the other conditions checked before fast mode applies were also changed.
Claude Code has a fast mode for web search. Previously, setting the environment variable CLAUDE_CODE_WEBSEARCH_USE_CCR_PROXY (an environment variable is a named value set in your shell before starting Claude Code) switched fast mode off unless you also set CLAUDE_CODE_WEBSEARCH_CCR_PROXY_FAST. That exception has been removed, and CLAUDE_CODE_WEBSEARCH_CCR_PROXY_FAST is no longer read at all.
Whether fast mode is used is still decided by CLAUDE_CODE_WEB_SEARCH_FAST_ARG or by a remote setting that is off unless it is switched on remotely.
When fast web search is in use, the usage events Claude Code records for the WebSearch tool now also note whether a search ran in "standard" or "extended" mode.
If you route web search through the proxy, you no longer need the extra variable to be eligible for fast mode. If you had set CLAUDE_CODE_WEBSEARCH_CCR_PROXY_FAST, it now does nothing and can be removed.
tengu_sleepy_shore Not enough to sayNothing here resolved what this flag was doing on this version, so nothing here should be read as on or off.
This account: no value returned · anonymous baseline: no value returned · compiled default in v2.1.283: not a boolean we can read
These values were read against a different version of Claude Code, so treat them as the nearest reading available instead of one taken on this release.
Read once, for one account on one subscription tier, against v2.1.283. It isn't a statement about your account. What a flag value here can and cannot tell you
A reading is one sample. Claude Code evaluates its flags remotely, so no client sees the targeting rule behind a value and this says nothing about your account.
It is not confirmed whether the other conditions checked before fast mode applies were also changed.