v0.20.0

oh-my-codex v0.20.0

0.20.0 migrates the entire OMX model contract to OpenAI's GPT-5.6 generation (Sol/Terra/Luna) and rolls up the dev-branch fixes and features merged since 0.19.1.

Highlights

• Frontier lane gpt-5.6-sol, standard lane gpt-5.6-terra, spark lane gpt-5.6-luna across runtime, agents, Rust crates, docs, prompts, skills, and the plugin mirror.
• Planner/architect exact gpt-5.6-sol pins (medium/xhigh); researcher exact gpt-5.6-terra; fast lanes on gpt-5.6-luna.
• Exact-model composition seam retargeted to gpt-5.6-terra with final-resolved-model precedence.
• Setup offers prompt-gated upgrades from legacy gpt-5.3-codex / gpt-5.5 to gpt-5.6-sol.
• Autopilot classifies canonical Terra/Luna as cheap planning lanes.
• Doctor reports accurate Spark model sources including models.team_low_complexity.
• New omx capabilities lock/check CLI providing a manual capabilities-lockfile preflight command (#3087).
• Project setup defaults to plugin mode with plugin cache (#3085); plugin hooks gated to omx-launched sessions (#3086); resume plugin preflight opt-in (#3088).
• Persisted subagents reopen on SessionStart (#3099); canonical worktree tool context (#3102).

Merged PRs since v0.19.1

#3079, #3080, #3082, #3085, #3086, #3087, #3088, #3091, #3092, #3094, #3097, #3099, #3100, #3102, #3104, plus direct migration commits 3e579633, 0ac484e0, 51ee0c28.

Compatibility

No breaking CLI or package-layout changes. Existing explicit model overrides keep their semantics as opaque strings. Project-scoped setup now defaults to plugin install mode (#3085) and plugin hooks activate only for omx-launched sessions (#3086).

Validation

Green dev and main CI, full node + Rust suites, three architect review rounds ending CLEAR/APPROVE, adversarial QA/red-team artifacts; readiness evidence in docs/qa/release-readiness-0.20.0.md.

Contributors

Thanks to Bellman and coolsik for contributing to this release.

Full Changelog: v0.19.1...v0.20.0