subcommands: optional-suffix usage words, one unioned choice list per merged spelling

[sadigaxund]

A usage form's leading word with a bracketed abbreviation suffix becomes a subcommand named by its full word, with the short prefix kept as an alias, and a flag documented once per invocation form renders as one row with one unioned choice list. S-141's command-pattern name rule was built a third time and is refused a third time, because a full-PATH sweep-diff caught it fabricating six command nodes on xauth, gprofng and claude.

Round 11 additions: mandible lldb-server now shows version, gdbserver and platform rather than v[ersion], g[dbserver] and p[latform], and each child is probed with its own full word, so gdbserver fills with its own ten flags. A third attestation bit admits only this shape to the §6 rule 0 probe gate, leaving heading_attested's meaning intact and invocation_attested still declined; rule 0's thirteen-program list is checked first and wins unconditionally, fenced by two new exec-policy tests. §7 Tier B rule 7 gains one narrow reconstruction, since these names occur in the raw text only as g[dbserver]: a name also satisfies the literal-occurrence rule when it is a raw token with its bracket characters deleted and nothing else changed. The existence oracle learned that same reconstruction, which returns existence_fabrication_tools to its baseline 56 over exactly the same 55 flagged tools, so no genuine fabrication anywhere was excused.

Fleet sweep against the 0b30c15 baseline, 2269 tools matched, 0 appeared, 0 disappeared: 0 flag losses, 18 flags gained across 4 tools (lvcreate 146 to 156, lvconvert 139 to 145, lvchange 73 to 74, jpackage 50 to 51, all stanza-head values recovered from the tool's own text), 0 subcommand losses, 6 subcommands gained across 2 tools (lldb-server and lldb-server-18, each gaining gdbserver, platform and version), 4 tools field-level. All nine named controls are byte-identical on the first capture.