A claude-code turn on a Console started without MOSAIC_CLAUDE_BIN failed
with a bare "adapter exited 127". The sandbox binds /usr, so the wrapper
/usr/bin/claude is visible, but its exec target /opt/claude-code/bin/claude
isn't bound, and the shell exits 127.
On exit 127 the runner now reads the tail of the turn's stderr, finds the
shell's "not found" line (bash, dash, env) and adds the program's basename:
"adapter exited 127 (command not found: claude)". It never shows a host
path or anything that isn't a plain program name; a 127 without such a
line keeps the bare reason.
The deploy side (MOSAIC_CLAUDE_BIN on the Console unit) is a Lead-owned
script change, written up in the lane report.
jason.woltje
61371adb10