feat: instance manifest, tool profiles, metrics, and budget enforcement

Land HARNESS-WP-0001 T01/T02/T04/T05: extend ADR-005 schedule.yml with
harness fields, named tool-profile registry, ADR-004 metrics writes, and
BudgetTracker wiring. CLI gains validate/profiles; task-file path kept.

agent_harness/hub.py

@@ -52,3 +52,48 @@ def close_task(task_id: str) -> bool:
         return True
     except httpx.HTTPError:
         return False
+
+
+def post_token_event(
+    repo: str,
+    tokens: int,
+    *,
+    budget: int | None = None,
+    agent: str | None = None,
+    ok: bool = True,
+    detail: dict[str, Any] | None = None,
+) -> bool:
+    """Best-effort token cost event for the hub Token Cost dashboard.
+
+    Schema is intentionally loose: if the hub rejects the payload we
+    swallow the error so a metrics-schema drift never fails a run.
+    """
+    payload: dict[str, Any] = {
+        "repo": repo,
+        "tokens": tokens,
+        "source": "agent-harness",
+        "ok": ok,
+    }
+    if budget is not None:
+        payload["budget"] = budget
+    if agent is not None:
+        payload["agent"] = agent
+    if detail:
+        payload["detail"] = detail
+    try:
+        resp = httpx.post(
+            f"{_base_url()}/token-events/upsert",
+            json=payload,
+            timeout=_TIMEOUT,
+        )
+        if resp.status_code >= 400:
+            # Fallback shape used by some hub builds
+            resp = httpx.post(
+                f"{_base_url()}/token-events/",
+                json=payload,
+                timeout=_TIMEOUT,
+            )
+        resp.raise_for_status()
+        return True
+    except httpx.HTTPError:
+        return False