New environment variables for remote sessions, including a stall-check interval

What

Environment variables are named values set outside Claude Code that change how it behaves. Several new ones apply when Claude Code runs as a remote session, where CLAUDE_CODE_REMOTE is set:

• CLAUDE_CODE_REMOTE_STALL_CHECK_INTERVAL_MS sets how often a remote session checks whether it has stalled. Without it, a built-in default is used. Before, the interval was fixed.
• CLAUDE_CODE_CCR_SLOW_SKILLS_WATCH, together with CLAUDE_CODE_REMOTE, turns on a watch for slow skills in remote sessions.
• CLAUDE_CODE_PERSONAL_HOOKS_OFF, CLAUDE_CODE_PLAIN_DELTA_DIRECT_WRITE and CLAUDE_CODE_PLAIN_DELTA_TAKE_AT_SOURCE are new names added to the lists of variables passed on to remote sessions and child processes. What they do is not shown.
• The check for passed-on names also matches INCREMENTAL_REQUEST_BODY, PLAIN_DELTA_FAST_PATH, UNWATCHED_REPLY_HOLD_MS and CCR_ONE_PLUGIN_LOAD_PER_RELOAD.
• CLAUDE_CODE_LAZY_ENV_GETTERS has been removed from these lists and no longer appears anywhere in this build.

Why

If you run remote sessions, you can now tune how quickly a stalled session is noticed and opt into a slow-skills watch. If you set CLAUDE_CODE_LAZY_ENV_GETTERS, it no longer appears in this build.