`effectcraft-cli script FILE` passes the file's text to script.run, which
ran a compiled .jsxbin script as JavaScript and failed with "SyntaxError:
unexpected '@'" at 1:1, while file.runScript already says .jsxbin isn't
supported.
script.run now refuses a script named `.jsxbin` or whose text starts with
the `@JSXBIN@` header, with file.runScript's message (one shared
constant). The check is in the command, so the CLI with or without
--bridge, MCP run_script and the Script Console all report it.
Tests: engine_entry_points (by header and by name), script_file_and_eval
(the CLI exits 1 with the message and no SyntaxError).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
3aaa840471