docs(milestone): complete v0.1 foundation

---ci---
phase: 0
milestone: v0.1
status: complete
---/ci---

server/guardrails/noop.py

@@ -0,0 +1,37 @@
+"""NoOpGuardrail — always-allow stub implementing the Guardrail interface (TASK-02-07).
+
+SLICE-02 ships this stub so the Pipecat pipeline has the pluggable guardrail hook
+in place from the first slice. SLICE-03 TASK-03-04 swaps in CustomerServiceGuardrail
+with no pipeline change (D-019). The disclaimer text is defined here (matches the
+RESEARCH.md safety baseline) so the pipeline can play it as the first AI utterance
+even before the real ruleset lands.
+"""
+
+from __future__ import annotations
+
+from server.services.base import Guardrail, GuardrailContext, GuardrailVerdict
+
+# The session-start disclaimer (RESEARCH.md §Safety). Played as the first AI
+# utterance of every session. Defined here so it exists from SLICE-02.
+DISCLAIMER_TEXT = (
+    "This is an AI practice session for training purposes. "
+    "It is not a real conversation and no real company is involved."
+)
+
+
+class NoOpGuardrail(Guardrail):
+    """Always-allow stub (SLICE-02 placeholder for the Guardrail slot)."""
+
+    name = "noop"
+
+    async def check(
+        self, text: str, context: GuardrailContext | None = None
+    ) -> GuardrailVerdict:
+        return GuardrailVerdict(allowed=True, reason="noop guardrail — all allowed", category="ok")
+
+    @property
+    def session_start_disclaimer(self) -> str:
+        return DISCLAIMER_TEXT
+
+
+__all__ = ["NoOpGuardrail", "DISCLAIMER_TEXT"]