Tier 1 uses forked Python subprocesses with seccomp, a pool size of 20 with a 5-40 range, under 100 millisecond P99 latency, and process-level isolation for arithmetic, strings, and simple algorithms.

| Tier 1 | Forked Python subprocesses + seccomp | 20 (5-40) | <100ms | Process-level | Arithmetic, strings, simple algorithms |

— PYRANA_PLATFORM_ARCHITECTURE_REFERENCE.md

### Three-Tier Execution Model

— PYRANA_PLATFORM_ARCHITECTURE_REFERENCE.md

Tier 1

— PYRANA_PLATFORM_ARCHITECTURE_REFERENCE.md