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Add dual-runtime Codex and Claude architecture scaffold#1

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brianmc wants to merge 27 commits into
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codex-dual-runtime-plan
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Add dual-runtime Codex and Claude architecture scaffold#1
brianmc wants to merge 27 commits into
mainfrom
codex-dual-runtime-plan

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@brianmc

@brianmc brianmc commented May 10, 2026

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Summary

This PR starts converting AI-Product-Team from a Claude-only extension shape into a dual-runtime Working Backwards product that can support both Claude Code and Codex.

It adds:

  • A runtime-neutral shared/ core with pipeline spec, methodology, and Critic rubrics
  • A Codex adapter scaffold under .codex/
  • A repo-level AGENTS.md for Codex operation
  • A runtime portability plan in docs/runtime-portability.md
  • A dual-runtime roadmap in ROADMAP.md
  • Updated CLAUDE.md to describe shared core plus Claude/Codex adapters

Notes

This preserves the existing .claude/ adapter. The next step is to gradually refactor Claude and Codex adapter files to read from shared/ directly instead of duplicating behavior.

Validation

  • Compared branch against main; branch is ahead and not behind.
  • Changes are documentation/scaffold only, so no runtime tests were run.

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