- Implement check-billing.sh script that verifies the most recent
transcript has entrypoint 'cli' (subscription pool) not 'sdk-cli'
- Script finds newest *.jsonl under ~/.claude/projects/ and scans
for entrypoint field, exiting 0 iff it equals 'cli'
- Handle no-transcripts and no-directory cases with distinct errors
- Update README with Troubleshooting and Release checklist sections
referencing the script as the pre-release gate
Acceptance criteria:
- bash -n passes (syntax valid)
- Executable mode 755
- README updated with troubleshooting/release checklist references
Bead-Id: bf-1n6
