Why: Normal execution roles must exclude Codex while a single enabled Codex adapter remains available for emergency routing and review.
Evidence: Parser invalid-case tests were RED before validation; all 17 config tests and agent_exec validate now pass.
Impact: Enables three attempts per normal profile, stable Cursor routing, and a validated emergency Codex profile.
Refs: feature/agent-cli-enforcement
Why: Routing needs an explicit per-profile attempt limit and a named Codex emergency profile before controller enforcement can be implemented.
Evidence: The new parser test failed on unknown keys before implementation; all 15 config test executions now pass and git diff --check is clean.
Impact: Adds backward-compatible optional configuration fields only; routing behavior is unchanged in this commit.
Refs: feature/agent-cli-enforcement
Why: Establish one validated project-local routing document before any real Agent execution is enabled.
Evidence: Cursor observed red then 12 green configuration tests; the host replays those tests, the temporary validation target, and whitespace checks during integration.
Impact: Adds the U1 configuration contract and parser only; real routing, adapters, controller execution, and governance adoption remain disabled.
Refs: docs/superpowers/plans/2026-10-15-project-agent-execution.md
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