[PerchAnton]

The release candidate previously had only a vanilla package consumer. Add a React 19.3.1 portal example and verify the same tarball in two separate clean consumers.

The example uses development StrictMode and covers a corrected dialog after remount, wrong initial focus, and lost return focus. A separate process must fail with exit 1. Standard HTML/JUnit reports and the original attachment retain the first mismatch and dependent not_run observations. React remains an example-only dependency.

Package preparation resolves the local archive and registry metadata into a temporary lockfile without installing node_modules. A separate empty consumer then installs with --offline --frozen-lockfile. This preserves required esbuild platform packages and pnpm policy checks. CI verifies package consumers before running the unchanged regression suite.

Add a report-reading guide, draft first-alpha notes, a release checklist, a focused bug-report template, SHA-256 output, and CI uploads of the tested archive and reports. Runtime code, ruleset, schema, and accepted 45-round evidence are unchanged. The candidate remains unpublished 0.1.0-alpha.5.

Validation on macOS / Node 24.22.1 / Playwright 1.64.1:

• pnpm check: strict types, 30 unit tests, 48 guard subprocess cases, and 153 browser tests passed.
• Final package check: ESM/CJS imports and declarations, all example TypeScript, 13 successful browser tests across teaching/guarded suites, plus the expected exit-1 control.
• An explicitly isolated metadata cache and package store passed preparation, frozen offline installation, build and all React checks.
• Keyboard review confirmed entry, both focus wraps, Escape and return focus. The HTML failure and JSON attachment were opened and checked.
• Relative documentation links and public material checks passed.
• Hosted CI passed on Linux and macOS for 3d2068502b8241bbc78d3161c763e7b24026b820; both platform artifacts contain the tested archive, checksums and consumer reports.

The original 100-round criterion remains unmet; this prepares the accepted alpha checkpoint, not full 0.1.0 acceptance or publication.