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// SyFox core C API — thin shared-library wrapper (server bridge).
// All decisions come from the SI substrate; this file only marshals JSON
// and exposes the SAME boundary knobs the CLI already has (v1.0 -> v3.0):
//
// M1 energy-norm measurement gain -> syfox_engine_set_energy_norm
// v1 SI salience gating + Miller window -> syfox_engine_set_source_modes
// M5 deterministic OMP parallel settle -> syfox_engine_set_parallel_settle
// v2.2 trigram lane policy -> syfox_engine_set_ngrams
// v2.2 script routing -> syfox_detect_script
// M3 machine-auditable evidence -> syfox_decide_ex(opts.evidence)
// v3.2 semantic layer + retrieval + hierarchy -> set_semantics / set_retrieval /
// set_retrieval_topk / set_retrieval_dose / set_hierarchy + opts keys
//
// No transformer, no classifier, no physics changes: si_substrate.hpp is
// untouched; every knob here exists because the CLI exposes it too.
// ============================================================================
#include "core/syfox.hpp"
#include "core/script.hpp"
#include "core/ngram.hpp"
#include <cstring>
#include <string>
using syfox::Engine;
namespace { bool truthy(const sfx::JV& v) {
return (v.is_bool() && v.b) || (v.is_num() && v.num != 0.0);
} }
extern "C" {
struct SyFoxHandle { Engine* eng; };
SyFoxHandle* syfox_engine_create(const char* model_dir) {
if (!model_dir) return nullptr;
SyFoxHandle* h = new SyFoxHandle();
h->eng = new Engine();
h->eng->load_model(model_dir);
return h;
}
void syfox_engine_free(SyFoxHandle* h) {
if (!h) return;
delete h->eng;
delete h;
}
const char* syfox_core_version(void) { return syfox::VERSION; }
// -- engine-scoped knobs (identical semantics to the CLI flags) -------------
void syfox_engine_set_energy_norm(SyFoxHandle* h, int on) {
if (h) h->eng->set_energy_norm(on != 0); // M1: measurement gain
}
void syfox_engine_set_source_modes(SyFoxHandle* h, int salience_gating, int miller_window) {
if (h) h->eng->substrate().set_source_modes(salience_gating != 0, miller_window != 0);
}
void syfox_engine_set_parallel_settle(SyFoxHandle* h, int on, int threads) {
if (!h) return;
#if defined(_OPENMP)
if (threads > 0) omp_set_num_threads(threads);
#endif
h->eng->substrate().set_parallel_settle(on != 0); // M5: OMP builds only
}
void syfox_engine_set_ngrams(SyFoxHandle* h, int on) {
(void)h; // process-global policy
si::norm::grams_enabled() = (on != 0); // v2.2 trigram lanes
}
// -- v3.2 semantic layer / retrieval-by-default / hierarchy knobs -------------
void syfox_engine_set_semantics(SyFoxHandle* h, int on) {
if (h) h->eng->substrate().set_semantics(on != 0);
}
void syfox_engine_set_retrieval(SyFoxHandle* h, int on) {
if (h) h->eng->set_retrieval(on != 0);
}
void syfox_engine_set_retrieval_topk(SyFoxHandle* h, int topk) {
if (h) h->eng->set_retrieval_topk(topk);
}
void syfox_engine_set_retrieval_dose(SyFoxHandle* h, double dose) {
if (h) h->eng->set_retrieval_dose(static_cast<float>(dose));
}
void syfox_engine_set_hierarchy(SyFoxHandle* h, int on) {
if (h) h->eng->set_hierarchy(on != 0);
}
// -- script detection (v2.2 --lang auto) ------------------------------------
// Returns a malloc'd slug ("latin", "bengali", ...) or "unknown".
char* syfox_detect_script(const char* text) {
if (!text) return nullptr;
const si::script::Script sc = si::script::detect_script(text);
const std::string slug = (sc == si::script::Script::Unknown)
? "unknown" : si::script::slug(sc);
char* buf = static_cast<char*>(std::malloc(slug.size() + 1));
std::memcpy(buf, slug.c_str(), slug.size() + 1);
return buf;
}
// -- decide ------------------------------------------------------------------
// Shared marshaling for syfox_decide (no evidence) and syfox_decide_ex.
static std::string decide_json(SyFoxHandle* h, const char* state,
const char* questions_json, bool want_evidence) {
std::string out;
try {
sfx::JV q = sfx::JV::parse(questions_json);
if (!q.is_obj()) { return "{\"error\":\"questions must be an object\"}"; }
syfox::Usage u;
auto answers = h->eng->decide(state, q, u);
u.calibrated = h->eng->calibration().fitted; // decide() resets Usage
sfx::JVObj ans;
for (const auto& a : answers) {
sfx::JVObj o;
o["type"] = sfx::JV(a.type);
if (a.type == "choice") {
o["choice"] = sfx::JV(a.choice);
sfx::JVObj pr;
for (const auto& p : a.probabilities)
pr[p.first] = sfx::JV(std::round(p.second * 1000.0f) / 1000.0f);
o["probabilities"] = sfx::JV(pr);
} else if (a.type == "score") {
o["score"] = sfx::JV(std::round(a.value * 1000.0f) / 1000.0f);
sfx::JVObj pr;
for (const auto& p : a.probabilities)
pr[p.first] = sfx::JV(std::round(p.second * 1000.0f) / 1000.0f);
o["probabilities"] = sfx::JV(pr);
} else if (a.type == "noul") {
o["noul"] = sfx::JV(std::round(a.probability * 1000.0f) / 1000.0f);
}
o["confidence"] = sfx::JV(std::round(a.confidence * 1000.0f) / 1000.0f);
o["deferred"] = sfx::JV(a.deferred);
if (!a.reason.empty()) o["reason"] = sfx::JV(a.reason);
ans[a.qid] = sfx::JV(o);
}
sfx::JVObj usage{
{"state_tokens", static_cast<double>(u.state_tokens)},
{"vocabulary", static_cast<double>(u.vocabulary)},
{"lanes", static_cast<double>(u.lanes)},
{"settled_energy", std::round(u.settled_energy * 1000.0f) / 1000.0f},
{"calibrated", sfx::JV(u.calibrated)},
{"engine", std::string("syfox-") + syfox::VERSION},
{"core", "si-substrate"}};
if (!u.retrieved.empty()) {
sfx::JVArr ret;
for (const auto& r : u.retrieved)
ret.push_back(sfx::JV(sfx::JVObj{
{"label", sfx::JV(r.first)},
{"resonance", std::round(r.second * 1000.0f) / 1000.0f}}));
usage["retrieval"] = sfx::JV(ret); // v3.2: priming memories
}
sfx::JVObj root{{"answers", sfx::JV(ans)}, {"usage", sfx::JV(usage)}};
if (want_evidence) // M3: supporting lanes + provenance + contradictions
root["evidence"] = h->eng->evidence_json(state, q, answers);
out = sfx::JV(root).dump();
} catch (const std::exception& e) {
out = std::string("{\"error\":\"") + e.what() + "\"}";
}
return out;
}
// Decides and returns a malloc'd JSON string: {"answers":..., "usage":...}.
// Caller frees with syfox_string_free. On malformed questions returns
// {"error": "..."}.
char* syfox_decide(SyFoxHandle* h, const char* state, const char* questions_json) {
if (!h || !state || !questions_json) return nullptr;
const std::string s = decide_json(h, state, questions_json, false);
char* buf = static_cast<char*>(std::malloc(s.size() + 1));
std::memcpy(buf, s.c_str(), s.size() + 1);
return buf;
}
// opts_json: {"evidence":bool, "energy_norm":bool, "salience_gating":bool,
// "miller_window":bool, "ngrams":"on"|"off",
// "semantics":bool, "retrieval":bool, "retrieval_topk":int,
// "retrieval_dose":num, "hierarchy":bool}
// Absent keys leave the current engine state untouched (sticky, CLI-equal).
char* syfox_decide_ex(SyFoxHandle* h, const char* state, const char* questions_json,
const char* opts_json) {
if (!h || !state || !questions_json) return nullptr;
bool evidence = false;
if (opts_json && *opts_json) {
try {
sfx::JV o = sfx::JV::parse(opts_json);
if (o.is_obj()) {
if (o.has("evidence")) evidence = truthy(o.at("evidence"));
if (o.has("energy_norm")) h->eng->set_energy_norm(truthy(o.at("energy_norm")));
if (o.has("salience_gating") || o.has("miller_window"))
h->eng->substrate().set_source_modes(
o.has("salience_gating") && truthy(o.at("salience_gating")),
o.has("miller_window") && truthy(o.at("miller_window")));
if (o.has("ngrams")) {
const std::string g = o.at("ngrams").as_str();
if (g == "on") si::norm::grams_enabled() = true;
if (g == "off") si::norm::grams_enabled() = false;
}
if (o.has("semantics")) h->eng->substrate().set_semantics(truthy(o.at("semantics")));
if (o.has("retrieval")) h->eng->set_retrieval(truthy(o.at("retrieval")));
if (o.has("retrieval_topk")) h->eng->set_retrieval_topk(static_cast<int>(o.at("retrieval_topk").as_num(5)));
if (o.has("retrieval_dose")) h->eng->set_retrieval_dose(static_cast<float>(o.at("retrieval_dose").as_num(0.30)));
if (o.has("hierarchy")) h->eng->set_hierarchy(truthy(o.at("hierarchy")));
}
} catch (...) { /* opts are optional; a bad opts object is ignored */ }
}
const std::string s = decide_json(h, state, questions_json, evidence);
char* buf = static_cast<char*>(std::malloc(s.size() + 1));
std::memcpy(buf, s.c_str(), s.size() + 1);
return buf;
}
// Model fabric summary: {"nodes":...,"lanes":...,"evidence_records":...,
// "calibrated":...,"version":...,"core":...}
char* syfox_engine_info(SyFoxHandle* h) {
if (!h) return nullptr;
const sfx::JVObj o{
{"nodes", static_cast<double>(h->eng->substrate().node_count())},
{"lanes", static_cast<double>(h->eng->substrate().lane_count())},
{"evidence_records", static_cast<double>(h->eng->substrate().evidence_count())},
{"calibrated", sfx::JV(h->eng->calibration().fitted)},
{"semantics", sfx::JV(h->eng->substrate().has_semantics())},
{"sem_edges", static_cast<double>(h->eng->substrate().resonance_edge_count())},
{"lane_contexts", static_cast<double>(h->eng->substrate().lane_context_count())},
{"retrieval_memories", static_cast<double>(h->eng->memories().size())},
{"hierarchy", sfx::JV(h->eng->hierarchy_on())},
{"version", std::string(syfox::VERSION)},
{"core", "si-substrate"}};
const std::string s = sfx::JV(o).dump();
char* buf = static_cast<char*>(std::malloc(s.size() + 1));
std::memcpy(buf, s.c_str(), s.size() + 1);
return buf;
}
void syfox_string_free(char* s) { std::free(s); }
} // extern "C"
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