The manifest-stamping RUN's multi-line jq filter lacked Dockerfile line
continuations (newlines inside shell quotes do not continue an instruction),
so the first real docker build died with 'unknown instruction: |'. Join the
filter with backslash continuations — the parser strips them, jq receives one
line.
shell/corpus/overhead.py is the M3 <3% wall-clock gate harness: alternating
bash/nash corpus rounds (observation spooling on for nash), median totals.
Co-Authored-By: Claude Fable 5 <[email protected]>
abkslm
