Add Sprints 46-59: governance, porting foundation, and language graduation prep (Steps 689-828)

Sprints 46-58 implement the cross-language porting foundation: language-to-IR
adapters, equivalence checking, gate validation, legacy ingestion, managed/dynamic
families, low-level/logic-actor semantics, debug workflow tooling, AST-native
family tools, Rust/CPP raising tools, system-level orchestration, query family,
and porting gates. Sprint 59 adds the governance layer (policy packs, review
boards, waiver packets, ambiguity triage, decision ledger) with the
whetstone_review_porting_decision MCP tool.

Also includes: sprint plans 46-130, MCP taskitem pipeline scripts,
CLAUDE.md, docs, and full test matrix (steps 689-828).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

editor/tests/step822_test.cpp

@@ -0,0 +1,101 @@
+// Step 822: Reviewer decision ledger integration (10 tests)
+#include "governance/ReviewerDecisionLedger.h"
+#include <iostream>
+
+static int p=0,f=0;
+#define T(n) { std::cout << "  " << #n << "... "; }
+#define P() { std::cout << "PASS\n"; ++p; }
+#define F(m) { std::cout << "FAIL: " << m << "\n"; ++f; }
+#define C(c,m) if (!(c)) { F(m); return; }
+
+static LedgerEntry makeEntry(const std::string& id, const std::string& decision = "approved") {
+    LedgerEntry e; e.entryId = id; e.issueRef = "ISS-01"; e.reviewer = "alice";
+    e.decision = decision; e.rationale = "looks good"; return e;
+}
+
+void t1() {
+    T(append_entry);
+    ReviewerDecisionLedger l; std::string err;
+    C(l.append(makeEntry("E1"), &err), "append");
+    C(l.entries().size() == 1, "size");
+    P();
+}
+void t2() {
+    T(missing_entry_id);
+    ReviewerDecisionLedger l; std::string err;
+    LedgerEntry e; e.issueRef="X"; e.reviewer="alice"; e.decision="approved"; e.rationale="ok";
+    C(!l.append(e, &err) && err == "entry_id_missing", "err");
+    P();
+}
+void t3() {
+    T(missing_reviewer);
+    ReviewerDecisionLedger l; std::string err;
+    LedgerEntry e; e.entryId="E3"; e.issueRef="X"; e.decision="approved"; e.rationale="ok";
+    C(!l.append(e, &err) && err == "reviewer_missing", "err");
+    P();
+}
+void t4() {
+    T(missing_rationale);
+    ReviewerDecisionLedger l; std::string err;
+    LedgerEntry e; e.entryId="E4"; e.issueRef="X"; e.reviewer="alice"; e.decision="approved";
+    C(!l.append(e, &err) && err == "rationale_missing", "err");
+    P();
+}
+void t5() {
+    T(summarize_decisions);
+    ReviewerDecisionLedger l; std::string err;
+    l.append(makeEntry("E5a", "approved"), &err);
+    l.append(makeEntry("E5b", "rejected"), &err);
+    l.append(makeEntry("E5c", "deferred"), &err);
+    auto s = l.summarize();
+    C(s.total == 3 && s.approved == 1 && s.rejected == 1 && s.deferred == 1, "counts");
+    P();
+}
+void t6() {
+    T(has_waivers_false);
+    ReviewerDecisionLedger l; std::string err;
+    l.append(makeEntry("E6"), &err);
+    C(!l.summarize().hasWaivers, "no_waiver");
+    P();
+}
+void t7() {
+    T(has_waivers_true);
+    ReviewerDecisionLedger l; std::string err;
+    auto e = makeEntry("E7"); e.waiverRef = "waiver:temporary";
+    l.append(e, &err);
+    C(l.summarize().hasWaivers, "waiver");
+    P();
+}
+void t8() {
+    T(for_issue_filter);
+    ReviewerDecisionLedger l; std::string err;
+    LedgerEntry e1 = makeEntry("E8a"); e1.issueRef = "ISS-A";
+    LedgerEntry e2 = makeEntry("E8b"); e2.issueRef = "ISS-B";
+    l.append(e1, &err); l.append(e2, &err);
+    auto r = l.forIssue("ISS-A");
+    C(r.size() == 1 && r[0].entryId == "E8a", "filter");
+    P();
+}
+void t9() {
+    T(modified_count);
+    ReviewerDecisionLedger l; std::string err;
+    l.append(makeEntry("E9", "modified"), &err);
+    C(l.summarize().modified == 1, "modified");
+    P();
+}
+void t10() {
+    T(to_json_summary);
+    ReviewerDecisionLedger l; std::string err;
+    l.append(makeEntry("E10"), &err);
+    auto j = ReviewerDecisionLedger::toJson(l.summarize());
+    C(j.value("total", 0) == 1, "total");
+    C(j.value("approved", 0) == 1, "approved");
+    P();
+}
+
+int main() {
+    std::cout << "Step 822: Reviewer decision ledger integration\n";
+    t1(); t2(); t3(); t4(); t5(); t6(); t7(); t8(); t9(); t10();
+    std::cout << "\nResults: " << p << "/" << (p+f) << " passed\n";
+    return f ? 1 : 0;
+}