harn-stdlib 0.10.28

Embedded Harn standard library source catalog
Documentation 
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// Deterministic bridge from an untrusted blueprint JSON document to the closed
// prompt_compiled_v1 lowering. Rust owns only the atomic scaffold transaction;
// this script keeps blueprint validation and policy lowering in Harn.
import { persona_blueprint_compile } from "std/personas/compiler"

fn __write(ok: bool, lowering = nil, error = nil) {
  __io_println(json_stringify({ok: ok, lowering: lowering, error: error}))
}

fn main(harness: Harness) -> int {
  const raw = harness.env.get_or("HARN_PERSONA_BLUEPRINT_JSON", "")
  if raw == "" {
    __write(
      false,
      nil,
      {code: "missing_blueprint", message: "HARN_PERSONA_BLUEPRINT_JSON is required"},
    )
    return 0
  }
  const blueprint = try {
    json_parse(raw)
  } catch (e) {
    __write(
      false,
      nil,
      {
        code: "invalid_blueprint_json",
        message: "persona blueprint must be valid JSON: " + to_string(e),
      },
    )
    return 0
  }
  const compiled = persona_blueprint_compile(blueprint)
  if is_err(compiled) {
    const report = unwrap_err(compiled)
    const error = if len(report.errors) > 0 {
      {code: report.errors[0].code, message: report.errors[0].message}
    } else {
      {code: "blueprint_invalid", message: "persona blueprint failed Harn validation"}
    }
    __write(false, nil, error)
    return 0
  }
  __write(true, unwrap(compiled), nil)
  return 0
}