examples: cordis-agent — the self-referential demo

The coding spine (DeepSeek V4 + local bash on dsh-stdio-agent) plus
@deepseek-ai/dsh-tool-cordis loaded by package name, run via demo:cordis.
Ships the keyless Loader smoke (the export-shape / package-name-resolution
guard) and the with-key smoke: a real model mounts a listener whose tagged
console line actually fires, builds and calls its own reverse_text tool, and
composes two mounts via provide/inject — all world-verified against the
registry and session events.

examples/cordis-agent/package.json

@@ -0,0 +1,7 @@
+{
+  "name": "cordis-agent-example",
+  "private": true,
+  "version": "0.0.1",
+  "type": "module",
+  "description": "Runnable demo: the self-referential harness — an agent that inspects and modifies its own cordis runtime"
+}