[puddly]

Adds serialx.is_non_unique_serial. This allows downstream code to better deal with non-unique serial numbers (i.e. clones or early device variants) without building its own small database of bad serial numbers.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.31%. Comparing base (d8bd287) to head (9cbd112).

Additional details and impacted files

@@           Coverage Diff           @@
##              dev     #143   +/-   ##
=======================================
  Coverage   94.30%   94.31%           
=======================================
  Files          25       25           
  Lines        4391     4397    +6     
=======================================
+ Hits         4141     4147    +6     
  Misses        250      250           

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[Copilot]

🟡 Changes recommended

Missing Windows-suffixed FTDI aliases cause known shared serial numbers to be classified as unique.

1 open issue

• Add missing Windows-suffixed aliases for shared FTDI serials · New

What changed in this PR

Adds SerialPortInfo.is_unique so downstream code can recognize known shared serial numbers without maintaining its own list.

Changes:

• Classifies missing, blank, and known shared serial numbers as non-unique.
• Keeps ESPHome device URLs tied to a port when serial numbers are non-unique.
• Adds classification and ESPHome clone coverage.

File	Description
tests/​test_serial_esphome.py	Adds a shared-serial device listing case.
tests/​test_common.py	Tests serial-number uniqueness classification.
serialx/​platforms/​serial_esphome.py	Uses uniqueness to determine port binding.
serialx/​common.py	Adds known shared serials and is_unique.

_{Review effort: Balanced}