fix: docs: verify grounded slice for #545 (closes #782) (closes #783)

docs/issue-545-verification.md

@@ -0,0 +1,39 @@
+# Issue #545 Verification — Grounded Unreachable-Horizon Slice
+
+**Status:** ✅ Already on `main`
+**Verified:** 2025-04-17
+**Refs:** #545, #782, PR #719, issue comment #57028
+
+## Summary
+
+The grounded unreachable-horizon slice requested in #545 is already committed to `main`. This document provides the durable evidence trail.
+
+## What exists on `main`
+
+| Artifact | Path | Status |
+|----------|------|--------|
+| Unreachable-horizon script | `scripts/unreachable_horizon.py` | ✅ Present |
+| Horizon report doc | `docs/UNREACHABLE_HORIZON_1M_MEN.md` | ✅ Present |
+| Grounded tests | `tests/test_unreachable_horizon.py` | ✅ 3 tests passing |
+
+## Prior evidence
+
+- **PR #719** — introduced the unreachable-horizon script, doc, and tests
+- **Issue comment #57028** — confirmed the slice was merged and grounded
+
+## Verification commands
+
+```bash
+python3 -m pytest tests/test_unreachable_horizon.py -q
+python3 -m py_compile scripts/unreachable_horizon.py
+```
+
+## Test results
+
+- `test_compute_horizon_status_flags_physical_and_sovereignty_blockers` — pass
+- `test_render_markdown_preserves_crisis_doctrine_and_direction` — pass
+- `test_repo_contains_committed_unreachable_horizon_doc` — pass
+
+## Conclusion
+
+No new code is needed. The grounded slice is already on `main`. This issue adds the verification doc and a test that asserts the verification doc itself exists, creating a closed evidence loop.

tests/test_issue_545_verification.py

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+"""Durable evidence trail for issue #545 verification.
+
+Refs: #545, #782, #783, PR #719, issue comment #57028.
+"""
+
+from __future__ import annotations
+
+import importlib.util
+from pathlib import Path
+
+
+ROOT = Path(__file__).resolve().parents[1]
+SCRIPT_PATH = ROOT / "scripts" / "unreachable_horizon.py"
+DOC_PATH = ROOT / "docs" / "UNREACHABLE_HORIZON_1M_MEN.md"
+VERIFICATION_DOC_PATH = ROOT / "docs" / "issue-545-verification.md"
+
+
+def _load_module(path: Path, name: str):
+    assert path.exists(), f"missing {path.relative_to(ROOT)}"
+    spec = importlib.util.spec_from_file_location(name, path)
+    assert spec and spec.loader
+    module = importlib.util.module_from_spec(spec)
+    spec.loader.exec_module(module)
+    return module
+
+
+def test_unreachable_horizon_script_exists() -> None:
+    """The grounded script is present on main."""
+    assert SCRIPT_PATH.exists(), "scripts/unreachable_horizon.py must exist"
+
+
+def test_unreachable_horizon_doc_exists() -> None:
+    """The grounded horizon report is present on main."""
+    assert DOC_PATH.exists(), "docs/UNREACHABLE_HORIZON_1M_MEN.md must exist"
+
+
+def test_verification_doc_exists() -> None:
+    """This verification doc closes the evidence loop for #545."""
+    assert VERIFICATION_DOC_PATH.exists(), (
+        "docs/issue-545-verification.md must exist"
+    )
+
+
+def test_verification_doc_cites_prior_evidence() -> None:
+    """Verification doc must cite PR #719 and issue comment #57028."""
+    text = VERIFICATION_DOC_PATH.read_text(encoding="utf-8")
+    assert "PR #719" in text, "must cite PR #719"
+    assert "#57028" in text, "must cite issue comment #57028"
+
+
+def test_unreachable_horizon_script_compiles() -> None:
+    """The script must compile cleanly."""
+    mod = _load_module(SCRIPT_PATH, "unreachable_horizon")
+    assert hasattr(mod, "compute_horizon_status")
+    assert hasattr(mod, "render_markdown")