Preserve complete Stop-hook stdout through lifecycle wrappers, wait for queued output to flush before exiting, bound child output with a larger explicit buffer, and add end-to-end regressions for large, multibyte, dry-run, and failure cases.
- Global --dry-run flag and ECC_DRY_RUN=1 env var - Enriched preview: shows target file path, tool name, and command - --dry-run stripped from argv so command routing works correctly - Handles non-JSON and empty stdin gracefully (session/stop hooks) - 10 tests covering isDryRun(), hook gating, enriched output, CLI routing
