mix pixir.bench.codex_pressure (pixir v0.1.3)

Samples local macOS process and memory pressure while Codex parallel work is running elsewhere.

This task does not spawn Codex threads or subagents. Codex thread/subagent creation is a runtime tool surface, not a shell API. The task is instead an agent-useful sampler that can run beside a manual or Codex-orchestrated fan-out window and write bounded evidence:

mix pixir.bench.codex_pressure --dry-run --json
mix pixir.bench.codex_pressure --target-n 8 --duration-seconds 120
mix pixir.bench.codex_pressure --process-patterns codex,electron
mix pixir.bench.codex_pressure --configured-limit 20 --json

Artifacts:

samples.jsonl
summary.json
report.md
completion_audit.json

The reported memory is local process/system pressure. It is not model memory and it is not provider-side inference memory.