Codex Evolve v0.2.0-rc.1

Codex Evolve — v0.2.0-rc.1

This prerelease replaces model-driven orchestration with a real deterministic
runner while preserving the primary-thread single-writer workflow.

New features

• Seeded native runner: A bundled dependency-free Node runner controls
  grouping, decision clustering, model routing, population updates, concurrency,
  and cleanup.
• Structured Codex workers: Every worker runs through an ephemeral,
  read-only codex exec session and returns a validated JSON proposal.
• Paper-aligned controls: New seed, similarity threshold, routing threshold,
  model-tier, and elitist/replace/accumulate update options.
• Usage trace: Results report worker calls, lite consensus operations, model
  routes, failures, and input, cached, output, and reasoning tokens.

Improvements

• Preserves the v0.1 fast, default, and thorough population sizes.
• Uses GPT-5.6 Sol for strong initialization and Terra for lower-cost
  recombination roles.
• Adds deterministic tests for parsing, grouping, clustering, routing, updates,
  concurrency, failure handling, and usage accounting.

Breaking changes

• Node.js 18+ and an authenticated Codex CLI are now required.
• Runner startup failures stop the workflow instead of silently falling back to
  non-deterministic in-thread orchestration.

Install

codex plugin marketplace add ukint-vs/codex-evolve --ref v0.2.0-rc.1
codex plugin add codex-evolve@codex-evolve

Codex Evolve uses the paper-supported diversity signal because Codex worker
output does not expose token log probabilities. This release does not claim to
reproduce the paper's benchmark, cost, accuracy, or throughput results.