Bootstrap Env actor & reshape Env#2768
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May 10, 2026 21:50
The RTS bootstrap filled Env fields directly in C, which made the Env actor hard to extend from Acton. Allocate Env in C only far enough to pin it to the main worker. Then send a bootstrap message that runs the generated Env.__init__ before starting the root actor. Keep the DB state shortcut after Env init so the initialized actor state is persisted before root startup.
Generated Env init creates EnvVar and Stdio service actors. C bootstrap passes EnvCap into generated Env init. EnvCap is not stored on Env. User code cannot forge service construction. EnvVar owns process environment access and is exposed as env.vars. Env keeps wrappers for existing getenv/setenv callers. Stdio owns stdin, stdout, and stderr and is exposed as env.stdio. Stdio receives the EnvVar actor for LANG lookup during stdin setup. Passing Env self from Env init is rejected by current actor init rules.
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Fixes #2368
Fixes #2334
Fixes #2341