Big runtime drop for AgenC. Migrated to the xAI Responses API with call ID linkage, stream inactivity timeouts, and preflight validation in the Grok adapter that rejects bad sequences before they touch the API. Retry and circuit-breaker policy, tool_call_id parity across providers. Observability -- per-call attribution with prompt shape before and after budgeting, trace IDs through the daemon. Something breaks in prod, you get a trace and a repro command instead of digging through logs. Security -- structured exec on bash, SSRF blocking on HTTP and browser tools, scoped approvals that don't deadlock. Daemon -- split-brain prevention, hot-reload config without restart, proper bridge teardown across sessions. Pipeline -- tool-turn ordering enforced, recovery hints on known failure patterns, memory ingestion hardened, golden regression tests in place.