Fix project creation: code-based in runner, not delegated to Step 2 LLM

Root causes fixed:
1. PROJECT_TOOLS removed from Step 2 tool set — project assignment is now
   exclusively handled by the runner in code, never by the LLM.
2. When Step 1 returns "new", runner calls execute_on_client insert/projects
   directly (before Step 2), gets the created id, and passes it as context.
3. Newly created projects are appended to the local `projects` list so that
   subsequent files in the same run can match to them via Step 1 — prevents
   one project per file when multiple files share the same topic.

Also add tests/test_classify_file.py with pytest cases for _classify_file
and a CLI runner: python -m tests.test_classify_file <file> [project...]

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/core/agent_runner.py

@@ -70,10 +70,11 @@ _MAX_PROCESSING_STEPS: int = 12
 _MAX_SCAN_DEPTH: int = 5
 
 # ── Data-type to tool mapping ─────────────────────────────────────────────
+# NOTE: "projects" is intentionally excluded — project creation/assignment is
+# handled in code by the runner, never delegated to the Step 2 LLM.
 
 _DATA_TYPE_TOOLS: dict[str, list[Any]] = {
     "tasks": TASK_TOOLS,
-    "projects": PROJECT_TOOLS,
     "notes": NOTE_TOOLS,
     "timelines": TIMELINE_TOOLS,
 }
@@ -663,10 +664,47 @@ async def run_local_agent(
                     domains,
                 )
 
-                # Step 2 — fetch existing entities for this project + domains.
-                # When project_id is "new", entities are fetched without a project
-                # filter; the LLM will create the project and link records to it.
-                effective_project_id = project_id if project_id != "new" else "standalone"
+                # Step 2 — resolve project_id via CODE, then fetch entities.
+                # Project creation is NEVER delegated to the Step 2 LLM.
+                if project_id == "new":
+                    proj_name = new_project_name or "Untitled Project"
+                    try:
+                        proj_result = await execute_on_client(
+                            action="insert",
+                            table="projects",
+                            data={"name": proj_name, "clientId": None},
+                        )
+                        created = proj_result.get("row", {})
+                        effective_project_id = created.get("id", "standalone")
+                        # Add to local list so subsequent files can match it.
+                        if "id" in created:
+                            projects.append(created)
+                        logger.info(
+                            "agent_runner: run=%s created project %r id=%s",
+                            run_id, proj_name, effective_project_id,
+                        )
+                    except Exception as exc:
+                        logger.warning(
+                            "agent_runner: run=%s failed to create project %r: %s",
+                            run_id, proj_name, exc,
+                        )
+                        effective_project_id = "standalone"
+                        proj_name = "unknown"
+                    project_context = (
+                        f"Project: {proj_name} (id: {effective_project_id}). "
+                        "Always set projectId to this id on every record you create."
+                    )
+                else:
+                    effective_project_id = project_id
+                    proj = next((p for p in projects if p["id"] == project_id), None)
+                    proj_name = proj.get("name", project_id) if proj else project_id
+                    project_context = (
+                        f"Project: {proj_name} (id: {project_id}). "
+                        "Always set projectId to this id on every record you create."
+                    )
+
+                # "projects" domain is never passed to Step 2 — handled above in code.
+                domains = [d for d in domains if d != "projects"]
 
                 existing_blocks: list[str] = []
                 for domain in domains:
@@ -675,22 +713,6 @@ async def run_local_agent(
 
                 existing_context = "\n\n".join(existing_blocks)
 
-                if project_id == "new":
-                    name_hint = f' Use "{new_project_name}" as the project name.' if new_project_name else ""
-                    project_context = (
-                        f"No existing project matches this file. "
-                        f"Create a new project first using the create_project tool, "
-                        f"then link all extracted records to its id.{name_hint}"
-                    )
-                    # Ensure the LLM has the project tools available.
-                    if "projects" not in domains:
-                        domains = ["projects"] + domains
-                else:
-                    project_context = (
-                        f"This file belongs to project ID: {project_id}. "
-                        "Use this project_id when creating records."
-                    )
-
                 system_prompt = _PROCESSING_SYSTEM_PROMPT.format(
                     existing_context=existing_context,
                     project_context=project_context,