forked from bchanot/claude
macOS ships bash 3.2 as /bin/bash, which `#!/usr/bin/env bash` resolves to when no newer bash is on PATH. Two builtins the repo relies on do not exist there, and both failed SILENTLY: - `mapfile` in the three surgical-commit helpers left every array empty, so the scope guards passed on nothing (fail-OPEN) and the commits degraded to "nothing pending — no-op" while reporting success. deploy-commit.test.sh went 4/16; memory and doc commits simply never happened. - `declare -A` in the session-start hook errored on every session and left each plugin cost at 0, so the passive-budget warning could never fire. `_read_lines_into` is the portable equivalent of `mapfile`, space-safe and resetting its target first — expanding a never-assigned array trips `set -u` on bash < 4.4, which is how the empty arrays surfaced as "unbound variable". Plugin costs move to a `case`. source-scope.sh's header prescribed `mapfile` to its callers; it now shows the read loop, and its own test plus run-reconcile.sh stop using the builtin. deploy-commit 16/16, source-scope 34/34, run-reconcile 25 GREEN / 0 RED, session-start stderr empty.