[claude] Add timmy learn autoresearch entry point (#907) (#1240)

Co-authored-by: Claude (Opus 4.6) <claude@hermes.local>
Co-committed-by: Claude (Opus 4.6) <claude@hermes.local>

tests/timmy/test_cli_learn.py

@@ -0,0 +1,94 @@
+"""Tests for the `timmy learn` CLI command (autoresearch entry point)."""
+
+from unittest.mock import MagicMock, patch
+
+from typer.testing import CliRunner
+
+from timmy.cli import app
+
+runner = CliRunner()
+
+
+class TestLearnCommand:
+    """Tests for `timmy learn`."""
+
+    def test_requires_target(self):
+        result = runner.invoke(app, ["learn"])
+        assert result.exit_code != 0
+        assert "target" in result.output.lower() or "target" in (result.stderr or "").lower()
+
+    def test_dry_run_shows_hypothesis_no_tox(self, tmp_path):
+        program_file = tmp_path / "program.md"
+        program_file.write_text("Improve logging coverage in agent module")
+
+        with patch("timmy.autoresearch.subprocess.run") as mock_run:
+            result = runner.invoke(
+                app,
+                [
+                    "learn",
+                    "--target",
+                    "src/timmy/agent.py",
+                    "--program",
+                    str(program_file),
+                    "--max-experiments",
+                    "2",
+                    "--dry-run",
+                ],
+            )
+
+        assert result.exit_code == 0
+        # tox should never be called in dry-run
+        mock_run.assert_not_called()
+        assert "agent.py" in result.output
+
+    def test_missing_program_md_warns_but_continues(self, tmp_path):
+        with patch("timmy.autoresearch.subprocess.run") as mock_run:
+            mock_run.return_value = MagicMock(returncode=0, stdout="3 passed", stderr="")
+            result = runner.invoke(
+                app,
+                [
+                    "learn",
+                    "--target",
+                    "src/timmy/agent.py",
+                    "--program",
+                    str(tmp_path / "nonexistent.md"),
+                    "--max-experiments",
+                    "1",
+                    "--dry-run",
+                ],
+            )
+
+        assert result.exit_code == 0
+
+    def test_dry_run_prints_max_experiments_hypotheses(self, tmp_path):
+        program_file = tmp_path / "program.md"
+        program_file.write_text("Fix edge case in parser")
+
+        result = runner.invoke(
+            app,
+            [
+                "learn",
+                "--target",
+                "src/timmy/parser.py",
+                "--program",
+                str(program_file),
+                "--max-experiments",
+                "3",
+                "--dry-run",
+            ],
+        )
+
+        assert result.exit_code == 0
+        # Should show 3 experiment headers
+        assert result.output.count("[1/3]") == 1
+        assert result.output.count("[2/3]") == 1
+        assert result.output.count("[3/3]") == 1
+
+    def test_help_text_present(self):
+        result = runner.invoke(app, ["learn", "--help"])
+        assert result.exit_code == 0
+        assert "--target" in result.output
+        assert "--metric" in result.output
+        assert "--budget" in result.output
+        assert "--max-experiments" in result.output
+        assert "--dry-run" in result.output