feat(tess): add configurable Pi interaction service (#728)

packages/mosaic/framework/fleet/README.md

@@ -15,6 +15,21 @@ default tmux server.
 
 - `examples/minimal.yaml` starts one local canary slot.
 - `examples/local-canary.yaml` starts a small generic dogfood fleet.
+- `examples/operator-interaction.yaml` is an example Pi operator-interaction
+  service; replace its example agent name before provisioning.
+
+## Operator interaction service
+
+`services/operator-interaction.yaml` pins the Pi runtime, GPT-5.6 Sol model,
+high reasoning, and the `operator-interaction` tool policy. The agent identity
+is provisioning data: choose a roster name, generate its per-agent environment
+file, then start the matching generic systemd instance. The service fails before
+launch if the configured identity does not match the instance or any pinned
+policy field drifts.
+
+The installed `tools/fleet/print-interaction-effective-policy.sh` prints only
+the resolved name, runtime, model, reasoning, and tool policy. It never reads
+or prints credential variables.
 
 Initialize a roster:
 

packages/mosaic/framework/fleet/examples/operator-interaction.yaml

@@ -0,0 +1,19 @@
+# Example instance only. Replace `Tess` with the chosen provisioned identity.
+version: 1
+transport: tmux
+tmux:
+  socket_name: mosaic-fleet
+  holder_session: _holder
+defaults:
+  working_directory: ~/src
+runtimes:
+  pi:
+    reset_command: /new
+agents:
+  - name: Tess
+    runtime: pi
+    class: operator-interaction
+    model_hint: openai/gpt-5.6-sol
+    reasoning_level: high
+    tool_policy: operator-interaction
+    persistent_persona: true

packages/mosaic/framework/fleet/roles/operator-interaction.md

@@ -0,0 +1,11 @@
+# Operator Interaction — fleet role definition
+
+The **operator-interaction** role is the authorized human interaction plane for
+Mosaic. It presents runtime and fleet state, mediates approved actions, and
+hands coding or general orchestration work to Mos.
+
+## Boundaries
+
+- It does not claim Mos-owned coding or general orchestration work.
+- It exposes only the configured, observable tool policy.
+- It does not receive or surface credentials in its effective policy.

packages/mosaic/framework/fleet/roster.schema.json

@@ -105,6 +105,18 @@
           "modelHint": {
             "type": "string"
           },
+          "reasoning_level": {
+            "type": "string"
+          },
+          "reasoningLevel": {
+            "type": "string"
+          },
+          "tool_policy": {
+            "type": "string"
+          },
+          "toolPolicy": {
+            "type": "string"
+          },
           "persistent_persona": {
             "oneOf": [{ "type": "boolean" }, { "type": "string" }]
           },

packages/mosaic/framework/fleet/services/operator-interaction.yaml

@@ -0,0 +1,5 @@
+# Generic service policy. Provisioning supplies the agent name as data.
+runtime: pi
+model: openai/gpt-5.6-sol
+reasoning: high
+tool_policy: operator-interaction