chore(harness): make repository agent-ready

Add concise routed context, task-aware agent roles, focused skills, and structured learning promotion.\n\nUnify local development and workspace tooling, add layered test and E2E verification, harden MCP authentication, and gate deployment behind verification and explicit production promotion.

.codex/skills/release-mobile/SKILL.md

@@ -0,0 +1,15 @@
+---
+name: release-mobile
+description: Prepare and verify Sauci iOS or Android releases. Use for versioning, EAS/native builds, Fastlane upload, release notes, or store submission preparation.
+---
+
+# Mobile release
+
+Read `docs/releasing.md`, `apps/mobile/RELEASING.md` when present, and the mobile
+scoped instructions. Confirm target platform and release profile. Run repository
+verification plus a native acceptance pass before starting a release build.
+
+Use the package scripts in `apps/mobile/package.json`; preserve platform signing
+and versioning. Building or uploading to a store is an external mutation: obtain
+explicit authorization for the requested target, then report the build artifact,
+version/build number, upload result, and read-back state.