Bug: Label_20_CFB.01.ts is dead code — never imported, has a self-contradictory preamble/regex, and would emit fake `decodeLevel:'full'` if enabled

[kevinelliott]

Summary

lib/plugins/Label_20_CFB.01.ts is not imported anywhere (no export * from './Label_20_CFB.01' in lib/plugins/official.ts, no reference in MessageDecoder.pluginClasses). Even if it were wired up, it can never match its intended payload: the qualifier preamble is #CFB.01 while the regex is anchored ^IN02,…, so the preamble filter and the body regex are mutually exclusive. Separately, the tail of decode() sets decoded = true; decodeLevel = 'full' outside the if (results?.groups) block, meaning any input that survived the preamble filter would emit a fake full decode with zero populated fields — the same anti-pattern already filed against Label_8E (#463), Label_H2_02E (#476), Label_ColonComma (#483), and Label_MA (#486).

Location

lib/plugins/Label_20_CFB.01.ts:13,26,65-66

Reproduction

• grep -r 'CFB.01' lib/ | grep -v Label_20_CFB.01 → no matches.
• Registering the plugin and sending { label: '20', text: '#CFB.01 anything' } would produce decoded: true, decodeLevel: 'full' with no fields populated.

Impact

Chore-level today (dead code, no production effect), but a latent silent-wrong-output waiting for the day someone adds export * from './Label_20_CFB.01'; without noticing the always-true tail.

Suggested fix

Pick one of:

1. Delete the file (and its test, if any).
2. Fix the qualifier vs. regex mismatch (either preamble IN and regex ^IN02,…, or preamble #CFB.01 and regex matching what actually follows), guard the decoded = true / decodeLevel = 'full' inside the if (results?.groups) block, register the plugin in official.ts + MessageDecoder.ts.

Also consider renaming the file to avoid the dot in Label_20_CFB.01.ts for consistency with the rest of lib/plugins/.