• Effects: replace NodeProgram's two positional parameters with NodeProgramOptions — { args, env } #814
• tf: remove the Input intermediary type; test takes Io directly #813
• fjs: convert the run/r command from asyncImport/await to the import_ effect #812
• DJS transpiler: replace Fs/readFileSync with the ReadFile effect; tests use the virtual effect runner and fs/io/virtual is deleted #811
• IO: expose sandbox on the Io interface; the test framework replaces measure + tryCatch with it, eliminating state threading #809
• Effects: add the sandbox operation — runs a sync function with try/catch and performance.now() timing in one atomic operation #808
• Docs: add the required JSDoc @module header to every module.f.ts that was missing one #804