diff --git a/tools/smoke-c0/common.ts b/tools/smoke-c0/common.ts
index 148a4f1..0b873a3 100644
--- a/tools/smoke-c0/common.ts
+++ b/tools/smoke-c0/common.ts
@@ -17,16 +17,20 @@ import { TranslateError } from "../../runtime/src/plan/mod.ts";
 import type { WirePlan } from "../../runtime/src/plan/format.ts";
 
 export const REPO_ROOT = new URL("../../", import.meta.url);
-export const POLYMORPH = "/home/lmartin/p/polymorph";
+export const POLYMORPH = Deno.env.get("POLYMORPH_ROOT") ??
+  "/home/lmartin/p/polymorph";
+/** experiment-mosh renamed and moved out of the polymorph tree
+ * (2026-08-10): it is `wosh`, a sibling OF the polymorph directory. */
+export const WOSH = Deno.env.get("WOSH_ROOT") ?? "/home/lmartin/p/wosh";
 
 /** Absolute paths to the consumer artifacts under test (never copied). */
 export const ARTIFACTS = {
-  tdz: `${POLYMORPH}/experiment-mosh/spikes/compose-async-tdz/composed.wasm`,
+  tdz: `${WOSH}/spikes/compose-async-tdz/composed.wasm`,
   execModel:
     `${POLYMORPH}/polymorph-iroh/target/wasm32-wasip2/release/iroh_exec_model_guest.wasm`,
-  engineGo: `${POLYMORPH}/experiment-mosh/engine-go/main.wasm`,
-  composedClient: `${POLYMORPH}/experiment-mosh/client-core/composed-client.wasm`,
-  composedProxy: `${POLYMORPH}/experiment-mosh/proxy/composed-proxy.wasm`,
+  engineGo: `${WOSH}/engine-go/main.wasm`,
+  composedClient: `${WOSH}/client-core/composed-client.wasm`,
+  composedProxy: `${WOSH}/proxy/composed-proxy.wasm`,
   irohEndpoint:
     `${POLYMORPH}/polymorph-iroh/target/wasm32-wasip2/release/iroh_endpoint.wasm`,
 } as const;
diff --git a/tools/smoke-c0/deno.json b/tools/smoke-c0/deno.json
index 3688b4c..1353307 100644
--- a/tools/smoke-c0/deno.json
+++ b/tools/smoke-c0/deno.json
@@ -3,10 +3,10 @@
   "version": "0.0.0",
   "exports": "./common.ts",
   "tasks": {
-    "leg1": "deno run --allow-read leg1_tdz.ts",
-    "leg2": "deno run --allow-read leg2_exec_model.ts",
-    "leg3": "deno run --allow-read leg3_throughput.ts",
-    "leg4": "deno run --allow-read leg4_websocket.ts",
-    "repro": "deno run --allow-read repro_stream_pump.ts"
+    "leg1": "deno run --allow-read --allow-env=POLYMORPH_ROOT,WOSH_ROOT leg1_tdz.ts",
+    "leg2": "deno run --allow-read --allow-env=POLYMORPH_ROOT,WOSH_ROOT leg2_exec_model.ts",
+    "leg3": "deno run --allow-read --allow-env=POLYMORPH_ROOT,WOSH_ROOT leg3_throughput.ts",
+    "leg4": "deno run --allow-read --allow-env=POLYMORPH_ROOT,WOSH_ROOT leg4_websocket.ts",
+    "repro": "deno run --allow-read --allow-env=POLYMORPH_ROOT,WOSH_ROOT repro_stream_pump.ts"
   }
 }
diff --git a/tools/smoke-c0/leg1_tdz.ts b/tools/smoke-c0/leg1_tdz.ts
index b9759da..bdbd501 100644
--- a/tools/smoke-c0/leg1_tdz.ts
+++ b/tools/smoke-c0/leg1_tdz.ts
@@ -2,7 +2,8 @@
 //
 //   deno run --allow-read leg1_tdz.ts
 //
-// Artifact: experiment-mosh/spikes/compose-async-tdz/composed.wasm — a wac
+// Artifact: wosh/spikes/compose-async-tdz/composed.wasm (the consumer
+// formerly named experiment-mosh) — a wac
 // composition of `tdz:plug` (async factory returning own<widget>) into
 // `tdz:socket` (async export awaiting it, plus an exported `handoff`
 // interface that names the same resource in a signature). That combination