Introduce graph IR layer to eliminate tombstoned operators#764

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antiguru:graph-ir-lowering

Commits on Mar 13, 2026

Fuse pipeline-connected operator chains in SubgraphBuilder::build()

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Fuse notify=true operators and add rounds parameter to event_driven

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Restrict chain fusion to notify=false operators with identity summaries

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Fix initial capability accounting and remove notify=true scaffolding

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Rename min_chain_length to fuse_chain_length and expose via getopts

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Check for pipeline pact instead of local in chain detection

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Generalize chain fusion to DAG subgraph fusion

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Document operator fusion in mdbook internals chapter

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Introduce graph IR layer to eliminate tombstoned operators

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