23 lines
1.0 KiB
Markdown
23 lines
1.0 KiB
Markdown
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# MirBuilderBox — Program(JSON v0) → MIR(JSON v0)
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Responsibility
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- Convert Stage‑B Program(JSON v0) into MIR(JSON v0) for VM/LLVM lines.
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- Phase 20.34 starts with a delegate implementation to Runner and progressively internalizes ops.
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Interface (stable)
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- `emit_from_program_json_v0(program_json: String, opts: Map|Null) -> String|Null`
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- Returns canonical MIR(JSON v0) on success; returns null and prints a tagged diagnostic on failure.
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Tags (Fail‑Fast, stable)
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- `[mirbuilder/input/null]` — input is null
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- `[mirbuilder/input/invalid]` — header missing (version/kind)
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- `[mirbuilder/delegate]` — delegate path selected (Runner `--program-json-to-mir`)
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- `[mirbuilder/delegate/missing]` — delegate/provider not wired yet
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Toggles (default OFF)
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- `HAKO_MIR_BUILDER_DELEGATE=1`: Use Runner `--program-json-to-mir` as a temporary provider
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Notes
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- Box‑First policy: boundary/contract first, then implementation. Keep tags stable; no silent fallback.
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- Large payloads: implementation may stream/json-scan later; initial version is string‑based.
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