EPBDS-16211: bring the plan's checklist in line with what is done

[AlexSamBY]

What changes

The checklists in docs/UPGRADE-PLAN.md now match what the plan records as done. Several boxes were still open, or said "still open", after the work had landed and been recorded elsewhere in the plan.

• Each box closed here cites the evidence that closes it.
• Each box that stays open now says why.

There is no code change. In package.json, only the text of lint messages changes.

Closed, with the record that closes them

§9.3 step 3, de-globalizing instance state, is marked done.

• Its header read "STARTED 2026-09-23: Active.translate is done, the rest is not".
• But every item under it had been closed or measured not to leak, and §11 retired R14 on that evidence (2026-10-01).

One item in step 3 had no record: the translation registries. I checked them now, and there is nothing to convert:

• Every localiseTranslation call in src/core runs at module top level.
• Active.LANG, the language the phrases are read in, is assigned nowhere outside the tests.
• The same search found no other write to Active from an instance, apart from the translate fallback that step 3 already records. renderField, Field and UIRender are code, and the same for every document. passwordCheck is set by the host.
• Each zero-hit search was proven with a control: the same pattern run on the tests finds their writes.

Phase 6: five boxes are ticked.

• State per instance: §9.3 step 3 and R14, as above.
• Runtime hazards: §9.3 step 4 records "This step is now empty", and R17 was retired on 2026-09-23.
• The engine ⇄ form-modules import cycle: gone since EPBDS-16211 Phase 6 step 2: dissolve the engine/form-modules import cycle #69 (2026-09-23). Re-checked:
  • No source file under src/core/modules imports the engine. Only its tests do, to render whole documents.
  • No suppression of the layer rule is left in src.
• Two instances on one page: four tests cover it: rules.two-instances.test.js, rules.two-instances-errors.test.js, popup-root.two-instances.test.js, and the two-documents case in examples.strict-mode.test.js.
• StrictMode: done 2026-09-29 (§9.3 step 7). The test has run on virtual time since EPBDS-16211: compare the StrictMode runs on virtual time #149.

The go/no-go on the E2/E3 tail of the TS migration. It was decided GO on 2026-09-30 (§9.6, Governance), and the tail is done.

H1/H6: the pack Tabs.

• EPBDS-16211 H6: rename the pack Tabs to StandaloneTabs #60 (2026-09-22) renamed it StandaloneTabs, because the two copies are not interchangeable.
• Its one importer is the demo's NavTabs.
• view: 'Tabs' renders the engine's copy.

H1/H6: grepping consumer metas for orphan names is moot, as measured.

• The mapper registered none of the twelve component files that EPBDS-16211 H1: delete the dead weight, 26 files #53 deleted.
• Eleven of the names were never views. Each renders the same "… field does not exist!" placeholder on the commit before EPBDS-16211 H1: delete the dead weight, 26 files #53 and on master.
• The twelfth, TabList, resolves to the engine's copy on both.
• So whatever a consumer's metas contain, the deletion changed nothing they render.

Phase 1: the react-refresh dev loop, checked on 18.

• The demo has developed against React 18.3 since EPBDS-16211 Develop and test against React 18.3 #31, and the checkpoint release on 17 was cancelled (§10). So there is no dev loop on 17 left to check.
• In the running demo, an edit to src/demo/pages/Examples.jsx arrived as a hot update, and so did reverting it.
• Neither reloaded the page: a value set on window survived both, and so did a number typed into a field.

Ongoing invariant: the alias grep stays at zero.

• It reads 0 today.
• No ui-*-pack alias is configured in any webpack config or in jest, and no such package is installed. So an import of one fails to resolve.

Two findings are marked resolved.

• E3's colGroup propType: E5 deleted the propTypes, and the TS type, TableColGroupProps['colGroup'], says style.
• F1's tooltip half: closed at F1 step 2. omitProps keeps view, index and symbol off the bubble.

Left open, now saying why

• F2: "The gate did not open: moment stays (2026-09-30)". Its two boxes wait for a reopening. The F2-seam invariant now says it applies only if F2 reopens.
• F4: postponed on 2026-09-30, and no longer a React 19 prerequisite. Its two boxes stay open.

package.json: the layer lint's messages

Only the message text changes, in 14 messages:

• The core/modules message said "Two sites in modules/form/utils.tsx predate this rule and carry an eslint-disable". EPBDS-16211 Phase 6 step 2: dissolve the engine/form-modules import cycle #69 (§9.3 step 2) removed both.
• The core/state override's three messages began "core/utils must not import". They were copied from the utils override.
• The layer direction every message quotes left out core/state. It now matches CLAUDE.md, and the bans configured in the overrides.

I put a probe import of the engine in src/core/state and another in src/core/modules. Both still fail lint, with the new text, and the probes are removed. Rewriting package.json through JSON leaves it byte-identical when nothing is changed, so nothing but these 14 lines moved.

Gates

All exited 0, run on this branch:

• lint:js, lint:css, typecheck, typecheck:contract;
• docs:props:check, docs:views:check, css:fixture:check;
• test:env-flags, build;
• test:coverage, thresholds included;
• test:pack, test:pack:peers, test:types;
• test:react16, test:react17, test:react19, 2854 tests each, with no worker crash;
• test:e2e, 41 tests;
• the manifest contract.

The number of tests is unchanged.

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