Consolidate Odysseus agent harness and tool contracts

tests/test_agent_evidence.py

@@ -1,3 +1,5 @@
+import json
+
 from src.agent_evidence import (
     CompletionRequirements,
     CompletionStatus,
@@ -17,6 +19,27 @@ def test_infers_only_explicit_output_or_edit_paths():
     assert requirements.verifier_required is True
 
 
+def test_infers_artifact_from_common_past_participle_request():
+    requirements = infer_completion_requirements(
+        "Build a digest saved to /workspace/results/ops_digest.md."
+    )
+
+    assert requirements.required_artifacts == (
+        "/workspace/results/ops_digest.md",
+    )
+
+
+def test_inference_ignores_negated_edits_and_callable_names():
+    requirements = infer_completion_requirements(
+        "Write /workspace/results/predictions.json serialized with "
+        "`json.dumps(..., indent=2)`. Do not modify `segmenter.py` or `cases.jsonl`."
+    )
+
+    assert requirements.required_artifacts == (
+        "/workspace/results/predictions.json",
+    )
+
+
 def test_inference_ignores_prose_abbreviations_that_look_like_paths():
     requirements = infer_completion_requirements(
         "Generate statistics, e.g. token counts and timing totals."
@@ -25,6 +48,14 @@ def test_inference_ignores_prose_abbreviations_that_look_like_paths():
     assert requirements.required_artifacts == ()
 
 
+def test_inference_ignores_bare_existence_helper_as_artifact():
+    requirements = infer_completion_requirements(
+        "Write /workspace/results/answer.json, then verify it with os.path.exists or ls."
+    )
+
+    assert requirements.required_artifacts == ("/workspace/results/answer.json",)
+
+
 def test_inference_recognizes_named_output_file():
     requirements = infer_completion_requirements(
         "Put the implementation in a file called /workspace/worker.py."
@@ -33,6 +64,16 @@ def test_inference_recognizes_named_output_file():
     assert requirements.required_artifacts == ("/workspace/worker.py",)
 
 
+def test_inference_recognizes_output_into_a_single_file():
+    requirements = infer_completion_requirements(
+        "Reconcile reliable facts into a single file "
+        "/tmp_workspace/results/profile.md. Save only that file in "
+        "/tmp_workspace/results/."
+    )
+
+    assert requirements.required_artifacts == ("/tmp_workspace/results/profile.md",)
+
+
 def test_output_directory_outranks_relative_example_filenames():
     requirements = infer_completion_requirements(
         "Save the results into `/tmp_workspace/results`. Save each recovered table "
@@ -477,6 +518,45 @@ def test_python_artifact_write_is_detected_against_declared_path():
     assert any(event.kind == EvidenceKind.ARTIFACT_MUTATION for event in ledger.events)
 
 
+def test_json_write_file_then_read_records_required_artifact_mutation():
+    """Native compact tool events carry write_file arguments as JSON."""
+
+    requirements = CompletionRequirements(
+        required_artifacts=("/workspace/results/paper_digest.md",)
+    )
+    ledger = EvidenceLedger.from_tool_events(
+        [
+            {
+                "round": 1,
+                "tool": "write_file",
+                "command": json.dumps({
+                    "path": "/workspace/results/paper_digest.md",
+                    "content": "# Verified digest\n",
+                }),
+                "output": "wrote /workspace/results/paper_digest.md",
+                "exit_code": 0,
+            },
+            {
+                "round": 2,
+                "tool": "read_file",
+                "command": json.dumps({
+                    "path": "/workspace/results/paper_digest.md",
+                }),
+                "output": "# Verified digest\n",
+                "exit_code": 0,
+            },
+        ],
+        requirements,
+    )
+
+    assert ledger.evaluate().status == CompletionStatus.SATISFIED
+    assert any(
+        event.kind == EvidenceKind.ARTIFACT_MUTATION
+        and event.artifact_path == "/workspace/results/paper_digest.md"
+        for event in ledger.events
+    )
+
+
 def test_inspect_media_export_satisfies_declared_artifact():
     requirements = infer_completion_requirements("Save /workspace/frame.png")
     ledger = EvidenceLedger.from_tool_events(