Reshape path A of step-01 into five explicit numbered steps and add an
inline-compilation fallback for runtimes that cannot spawn sub-agents
(Copilot, Codex, local Ollama, older Claude).
- Pull cache validity, compilation, verification, and continuity into
separate numbered steps instead of nested paragraphs.
- Define "valid cached context" upfront: non-empty and starts with
`# Epic <N> Context:`.
- Add inline-compilation fallback: runtimes without sub-agent support
read compile-epic-context.md and follow it directly.
- Make previous-story continuity run regardless of which context source
succeeded (cache hit, fresh compilation, or path-B raw fallback).
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