Version: v1.12.0 · File: batch/batch-runner.sh

The new read-only --status / --watch progress feature has two portability issues:

1. Prerequisite gate: it runs only after check_prerequisites, which exits if batch-input.tsv, batch-prompt.md, or the claude CLI is missing. A read-only progress check only needs batch-state.tsv, so inspecting a prior/remote run from an environment without Claude (or after input cleanup) never reaches print_status_table.
2. bc dependency: print_status_table computes score sum/average with bc, but check_prerequisites never verifies bc, and the rest of the script already migrated to awk. On minimal shells without bc, the average silently degrades to N/A.

Suggested fix: let --status/--watch short-circuit prerequisites (require only batch-state.tsv), and reuse the awk-based arithmetic from print_summary.

Flagged independently by Copilot, qodo, and Codex on a downstream sync PR.