v5.0.0 derived the license.enc AES key as sha256("pulse-license-" +
material) where material was the raw /etc/machine-id file content —
trailing newline included — with hostname and a fixed dev fallback as
alternates. v6 trims machine-id before hashing and dropped both
fallbacks, so licenses activated on v5.0.0 (before .license-key shipped
in v5.0.1) could never be decrypted and the December 2025 lifetime
cohort silently booted as Community.
Collect the raw v5 key materials at construction and try them verbatim
as legacy sha256 candidates during decrypt, alongside the existing
trimmed HKDF/legacy derivations. The write path is unchanged: persistent
random key + HKDF only. Pins the cloud-paid persistence contract to the
full v5.0.x compatibility-loader material set.
Dead-code sweep. Functions flagged unreachable by golang.org/x/tools/cmd/deadcode
and confirmed unused across pulse, pulse-enterprise, pulse-pro and pulse-mobile by
adversarial cross-repo verification. Cross-module reachability was checked
explicitly (only pkg/ exported symbols are importable by other modules; internal/
packages and _test.go files are not). go build, go vet and test-compile all pass.
rcourtman