emrg: persist repo URL in install-info.json for evolution workspace self-heal (rant 20:42)

emrg/server/git_utils.py

@@ -55,12 +55,17 @@ def _cached_tool_path(tool: str) -> str | None:
 
 
 def _cache_tool_paths(git: str, gh: str) -> None:
-    """Persist resolved tool paths so later lookups are O(1)."""
+    """Persist resolved tool paths so later lookups are O(1).
+
+    Also persists the EMRG repo URL (``repo``) so the evolution workspace
+    self-heal (rant 2026-08-06T20:42:05) can clone on demand without
+    hardcoding — packaged installs have no git remote to detect.
+    """
     try:
         data = {}
         if INSTALL_INFO.exists():
             data = json.loads(INSTALL_INFO.read_text(encoding="utf-8"))
-        data.update({"git_path": git, "gh_path": gh})
+        data.update({"git_path": git, "gh_path": gh, "repo": "https://github.com/argszero/emrg.git"})
         INSTALL_INFO.write_text(
             json.dumps(data, ensure_ascii=False, indent=2), encoding="utf-8"
         )

tests/test_git_utils.py

@@ -75,3 +75,41 @@ def test_detect_nonexistent_dir():
     """Returns empty string for a directory that doesn't exist."""
     result = _detect_git_remote("/nonexistent/path/xyz/test")
     assert result == ""
+
+
+# ── _cache_tool_paths (repo field, rant 2026-08-06T20:42:05) ──────
+
+
+def test_cache_tool_paths_writes_repo_field(tmp_path, monkeypatch):
+    """_cache_tool_paths persists git/gh paths AND the EMRG repo URL."""
+    from emrg.server import git_utils as mod
+    import json as _json
+
+    info = tmp_path / "install-info.json"
+    monkeypatch.setattr(mod, "INSTALL_INFO", info)
+
+    mod._cache_tool_paths("/usr/bin/git", "/usr/bin/gh")
+
+    data = _json.loads(info.read_text(encoding="utf-8"))
+    assert data["git_path"] == "/usr/bin/git"
+    assert data["gh_path"] == "/usr/bin/gh"
+    assert data["repo"] == "https://github.com/argszero/emrg.git"
+
+
+def test_cache_tool_paths_preserves_existing_fields(tmp_path, monkeypatch):
+    """Existing fields in install-info.json are preserved on rewrite."""
+    from emrg.server import git_utils as mod
+    import json as _json
+
+    info = tmp_path / "install-info.json"
+    info.write_text(
+        _json.dumps({"git_path": "/old/git", "custom": 1}), encoding="utf-8"
+    )
+    monkeypatch.setattr(mod, "INSTALL_INFO", info)
+
+    mod._cache_tool_paths("/usr/bin/git", "/usr/bin/gh")
+
+    data = _json.loads(info.read_text(encoding="utf-8"))
+    assert data["git_path"] == "/usr/bin/git"
+    assert data["custom"] == 1  # preserved
+    assert data["repo"] == "https://github.com/argszero/emrg.git"