Claude Code writes short progress summaries of what a subagent (a helper that works on part of a task) is doing. One mode builds those summaries from the whole conversation. Inside a claude.ai chat, Claude Code now skips that mode, because a claude.ai chat never sends the whole conversation. The only exception is when the mode was set by an override. Claude Code records the reason for skipping once.
Why
Subagents running inside a claude.ai chat get only short summaries.
How sure we are
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubtIt is not clear whether setting `CLAUDE_CODE_DISABLE_AGENT_PROGRESS_SUMMARIES` counts as the override.