feat: add read_discovery_answers, append_followup_answer, and ask-more command

- Add read_discovery_answers() to parse discovery-log.md rows into dicts
  with low_confidence and needs_followup boolean flags.
- Add append_followup_answer() to append follow-up rows linked to original Q-A IDs.
- Add 'ask-more' CLI command that detects Low-confidence and Follow-up-needed
  answers, prompts for additional details, and records them in the log.
- Add 6 tests: read_discovery_answers round-trip, empty-log handling,
  low-confidence detection, follow-up flag detection, and append_followup.

tests/test_discovery.py

@@ -105,6 +105,96 @@ def test_append_preserves_existing_history(tmp_path: Path) -> None:
     assert len(data_rows) == 2
 
 
+def test_read_discovery_answers_returns_dicts(tmp_path: Path) -> None:
+    discovery_mod.append_discovery_answer(
+        tmp_path,
+        question_id="Q-001",
+        question="What is this?",
+        answer="A thing",
+        confidence="High",
+        follow_up_needed="No",
+    )
+
+    answers = discovery_mod.read_discovery_answers(tmp_path)
+    assert len(answers) == 1
+    assert answers[0]["id"] == "Q-001"
+    assert answers[0]["question"] == "What is this?"
+    assert answers[0]["answer"] == "A thing"
+    assert answers[0]["confidence"] == "High"
+    assert answers[0]["follow_up_needed"] == "No"
+    assert answers[0]["needs_followup"] is False
+    assert answers[0]["low_confidence"] is False
+
+
+def test_read_discovery_answers_returns_empty_when_no_log(tmp_path: Path) -> None:
+    log_path = tmp_path / "context" / "discovery-log.md"
+    assert not log_path.exists()
+
+    answers = discovery_mod.read_discovery_answers(tmp_path)
+    assert answers == []
+
+
+def test_read_discovery_answers_detects_low_confidence(tmp_path: Path) -> None:
+    discovery_mod.append_discovery_answer(
+        tmp_path,
+        question_id="Q-002",
+        question="How much?",
+        answer="About half",
+        confidence="Low",
+        follow_up_needed="No",
+    )
+
+    answers = discovery_mod.read_discovery_answers(tmp_path)
+    low_conf_rows = [a for a in answers if a["low_confidence"]]
+    assert len(low_conf_rows) == 1
+    assert low_conf_rows[0]["id"] == "Q-002"
+
+
+def test_read_discovery_answers_detects_followup_flag(tmp_path: Path) -> None:
+    discovery_mod.append_discovery_answer(
+        tmp_path,
+        question_id="Q-003",
+        question="What next?",
+        answer="TBD",
+        confidence="High",
+        follow_up_needed="Yes",
+    )
+
+    answers = discovery_mod.read_discovery_answers(tmp_path)
+    fu_rows = [a for a in answers if a["needs_followup"]]
+    assert len(fu_rows) == 1
+    assert fu_rows[0]["id"] == "Q-003"
+
+
+def test_append_followup_appends_row(tmp_path: Path) -> None:
+    # First create the log with an existing entry
+    discovery_mod.append_discovery_answer(
+        tmp_path,
+        question_id="Q-010",
+        question="Original?",
+        answer="Original answer",
+        confidence="High",
+        follow_up_needed="No",
+    )
+
+    original_count = len(discovery_mod.read_discovery_answers(tmp_path))
+
+    discovery_mod.append_followup_answer(
+        tmp_path,
+        question_id="Q-010",
+        follow_up_question="Can you elaborate?",
+        answer="Yes, it's bigger than expected.",
+        confidence="Medium",
+    )
+
+    answers = discovery_mod.read_discovery_answers(tmp_path)
+    assert len(answers) == original_count + 1
+    # The new row should have the original Q-010 id and follow-up data
+    new_row = [a for a in answers if a["question"] == "Can you elaborate?"][0]
+    assert new_row["follow_up_needed"] == "Yes"
+    assert new_row["confidence"] == "Medium"
+
+
 def test_header_is_written_on_create(tmp_path: Path) -> None:
     discovery_mod.append_discovery_answer(
         tmp_path,