7cebe901b7
- 28 symbols across discovery, mcp header policy, agent-hub projection and rendering, the agent registry, shell tokenizing and changelog comparison were exported but referenced only inside their own module; they are now module-private, shrinking the deep-import surface. - Kept AGENT_PLUGIN_MANIFEST_SCHEMA, AGENT_PLUGIN_MCP_SCHEMA, parseAgentPluginManifest, clearAgentPluginRootCache and mergeMCPHeaders exported: each is a seam for tests that defend real parsing or header precedence behavior. - Nothing reachable from an explicit exports entry or public barrel changed.