fix(host): review round 20 — canonical shape declared at the interface; hermetic home-shape spec; single resolve

packages/client/connection/src/client/fixture.ts

@@ -1016,6 +1016,10 @@ export function createFixtureApi(options: FixtureOptions = {}): ApiProxy {
       // same tree the browse primitives serve).
       pickDirectory: request => ok(request, { path: `${FIXTURE_HOME}/Documents/project` }),
       listDirectory: (request) => {
+        // The fixture accepts CANONICAL paths only: a decorated input
+        // (./, //, ..) misses the tree map and reads as unreadable, where
+        // the real backend resolve()s it first. The keyless lanes drive
+        // canonical paths, so the divergence stays out of transcripts.
         const target = request.payload.path ?? FIXTURE_HOME
         const children = childrenOf(target)
         if (children === undefined) {