A new bin of eureka-state, crates/eureka-state/src/bin/huginn/: the agents'
shell door to the mind. Text out, typed exit codes, strict decode of
agent-written JSON (unknown key paths refused, never values), the named
campaign-state recipes, and a read-back after every committed admission.
lib.rs, main.rs and tests/mcp.rs are untouched.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>