Non-linear generation: backport across pipeline stages & Story Builder steps#566

Merged

atomantic merged 7 commits into

mainfrom

feat/non-linear-stage-generation-wt

May 30, 2026

Commits on May 30, 2026

pipeline: let any text stage generate from any other populated stage (backport)
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story-builder: start from any step and backfill the idea/arc from drafted issues
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migrations: track the source-agnostic prompt hashes across prior stage-prompt migrations
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address review (self): tilde-fence + injection guard for sourceMaterials prompts; fix dead goToStep args
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address review (claude): idea backfill guard, sourceStageIds route test, story-builder prompt drift entry
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address review (codex): preserve season synopsis from arc backfill extraction
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simplify: clean up state proxies, redundant sort, Set overhead, route literal
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