EGM review of the plan's third revision

An Elephant-and-Goldfish Model review, run on 2026-11-02, of the first draft of the third revision of sharded-bundle-catalog-plan.md, which re-plans Phases 4 to 9 against the specification's sixth revision (GH-333), with the specification's tracker and adoption-gate passages (GH-332). Five reviewers read the draft in parallel, against sdmxlib 9b4e933b, statcatlib 27d022b, sdmxlib-rest 1ce79f1 and the hub at 2fce9f2: design, implementation readiness, codebase details, zoom out and style. review_report.md merges their findings and records what the revision did with each.

What came of it, in the revised plan:

• Phase 3 gains sdmxlib work. build_edition builds a product's first edition only and gathers structures from dataflow closures, so sdmxlib adds a walk and cut over an open builder, a structures-only fill by agency and family, and check_edition(structures=) over several structure editions.
• Phase 4's routing-field proposal gains full_artefacts, so a /structure request routes to its structure product; pool and pinned wait for Phase 6, and no new event kind is proposed.
• The release job stays the only Inventory writer on a server: it writes the retire versions, GC only deletes, and pre-materialisation runs as its own job.
• Spec work no phase held is placed: supersede_pending, items 2 and 6 of §6.5, the unrecorded-edition sweep and the alerts in Phase 5; result-store GC and the CDN purge in Phase 6; expunge, export(live_only=True), rebuild-inventory and the restore commands in Phase 9.
• Phase 4's corpus is sealed locally with embargo on and copied through the blob writer, so Phase 4 tests embargoed entries without the Phase 5 fold.