Caspian syntax GitHub issue

{"vibecode": {
    "doc": "syntax",
    "role": "umbrella landing page for Caspian syntax topics. Per-construct references that complement the language spec in caspian.md."
}}

Per-topic syntax references. The big-picture spec lives in caspian.md; this directory breaks it out by construct so each topic gets its own page.

• Assignment operators — =, &=, compound forms.
• Class definition — class / inherits / field / helper. (The JSON form is spec'd in mikobase/class-definition.md.)
• Exceptions — raise and catch; multiple in-flight exceptions; cross-role catch semantics.
• Loops — while, do, as, loop-object methods.
• Operators — arithmetic, comparison, logical, pipes.
• Parameters — call binding, public names, *args / **opts, splats, errors.
• Pipes — the | and |& operators.
• Regexes — pattern syntax.
• System methods — %engine, %utils, %call, %forks, etc.