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Oh My Codex

v0.20.0 Feature

This release adds 3 notable features for engineering teams evaluating rollout.

Published 17d Developer Productivity
✓ No known CVEs patched
Read the diff → Tool health → What is this tool? →

✓ No known CVEs patched in this version

Summary

AI summary

Updates Highlights, Sol/Terra/Luna, and medium/xhigh across a mixed release.

Changes in this release

Feature Medium

Adds new CLI commands `omx capabilities lock` and `check` for manual capabilities-lockfile preflight.

Adds new CLI commands `omx capabilities lock` and `check` for manual capabilities-lockfile preflight.

Source: llm_adapter@2026-07-16

Confidence: high

 —
Feature Medium

Defaults project setup to plugin install mode with plugin cache enabled.

Defaults project setup to plugin install mode with plugin cache enabled.

Source: llm_adapter@2026-07-16

Confidence: high

 —
Feature Medium

Gates plugin hooks to activate only for omx-launched sessions.

Gates plugin hooks to activate only for omx-launched sessions.

Source: llm_adapter@2026-07-16

Confidence: high

 —
Feature Medium

Adds opt‑in resume plugin preflight capability (PR #3088).

Adds opt‑in resume plugin preflight capability (PR #3088).

Source: llm_adapter@2026-07-16

Confidence: high

 —
Feature Medium

Persists subagents and reopens them on SessionStart.

Persists subagents and reopens them on SessionStart.

Source: llm_adapter@2026-07-16

Confidence: high

 —
Feature Medium

Introduces canonical worktree tool context (PR #3102).

Introduces canonical worktree tool context (PR #3102).

Source: llm_adapter@2026-07-16

Confidence: high

 —
Feature Medium

Migrates entire OMX model contract to OpenAI GPT‑5.6 across runtime, agents, Rust crates, docs, prompts, skills, and plugin mirror.

Migrates entire OMX model contract to OpenAI GPT‑5.6 across runtime, agents, Rust crates, docs, prompts, skills, and plugin mirror.

Source: llm_adapter@2026-07-16

Confidence: high

 —
Feature Medium

Introduces frontier lane `gpt-5.6-sol`, standard lane `gpt-5.6-terra`, and spark lane `gpt-5.6-luna` for different usage scenarios.

Introduces frontier lane `gpt-5.6-sol`, standard lane `gpt-5.6-terra`, and spark lane `gpt-5.6-luna` for different usage scenarios.

Source: llm_adapter@2026-07-16

Confidence: high

 —
Feature Medium

Provides prompt‑gated upgrade path from legacy `gpt-5.3-codex` / `gpt-5.5` to new `gpt-5.6-sol` models.

Provides prompt‑gated upgrade path from legacy `gpt-5.3-codex` / `gpt-5.5` to new `gpt-5.6-sol` models.

Source: llm_adapter@2026-07-16

Confidence: high

 —
Feature Medium

Enhances Doctor reports to accurately list Spark model sources including `models.team_low_complexity`.

Enhances Doctor reports to accurately list Spark model sources including `models.team_low_complexity`.

Source: llm_adapter@2026-07-16

Confidence: high

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Full changelog

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

View diff on GitHub

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Related context

Earlier breaking changes

  • v0.18.5 Ultragoal completion now requires independent reviewer and architect evidence before marking complete.

Beta — feedback welcome: [email protected]