CodexGate Scenario SSOT

Scenario JSON is packaged with the runtime under backend/src/fractalops/contexts/codexgate/resources/scenarios. This directory intentionally contains no scenario JSON overlays.

Canonical flow:

GitHub PR / review / issue / check failure becomes a CodexGateSignal.
Signals are matched against scenario packs and scored into a CodexGateEvaluation.
Evaluations may be promoted into proposal-bound GitOps improvements.
Codex runs and structured probe_steps persist run artifacts and evidence.

Scenario required fields:

pack_key
signal_kinds
gitops_surface
expected_artifacts
probe_steps
codex_prompt_template
acceptance_contract

Current catalog target: 50 packaged scenarios spanning portal, evidence, autodream, runtime, Studio, and GitHub improvement loops.