Hardening after the security gate on a2ac018 (3 MEDIUM, all closed and
re-measured):
- dir tokens are deduplicated and capped: more than 20 distinct cd/-C
targets in one command denies before any git fork (20000 tokens: 0.15 s
against the 10 s hook timeout that used to turn a flood into an allow)
- a git or cd failure while reading gitflow.autopush denies instead of
reading as auto (git absent, usage error, unenterable dir); the key
being unset is the only "auto" answer; the decision is recorded only
after one candidate was evaluated cleanly, else the EXIT trap denies
- cd/pushd/-C targets that follow a quote or backtick (bash -c '…') are
extracted; quote characters are excluded from unquoted tokens
User decision (contract, gated): both fail-closed cases also fire in
auto mode on such pathological commands; silence in auto mode holds for
every ordinary push. Header limits list the residual misses (quotes or
backslashes inside a token, cumulative relative cd, unparseable payload)
backed by the soft_deny rule. Tests: 71 checks (T48–T50b added).
bchanot
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