Making every pinned field read-only left an optional one unreachable: the
schema is equally happy with or without it, but the form displayed a value the
user could neither send nor edit. An optional `const` is a yes/no rather than
a fixed answer, so it renders as its single choice, clearable — opting in sends
the schema's own typed value, opting out leaves the property absent. A required
one is still displayed read-only, since there is nothing to decide.
Signed-off-by: cliffhall <cliff@futurescale.com>
- `const` constrains a property that is PRESENT; it neither requires the
property nor acts as a default. It is now supplied automatically only where
the schema also requires the field — in `collectSchemaDefaults`,
`applySchemaConstants` and the TUI's initial values alike — so an optional
`dryRun: { const: true }` no longer turns a valid `{}` call into one that
asks the server to do something. A value that IS present is still corrected
to the constant, whatever supplied it, and the field stays read-only.
- Offerability is judged on the base+member merge rather than the raw member,
so `anyOf: [{ required: ["email"] }, { required: ["phone"] }]` over
root-declared properties is offered. It was declined, which left the gate
checking the base alone and accepting `{}` — which that schema rejects.
- The TUI's branch sections keep the schema's own `required` for the seeding
decision while still rendering every branch field non-required, which is what
keeps a static form submittable.
Signed-off-by: cliffhall <cliff@futurescale.com>
A schema may require a property it never declares: `{ type: "object",
required: ["token"] }` is legal and the tool plainly takes an argument.
declaresAnyFields counted only `properties`, so an App tool shaped that way —
including nested under a composition — was reported input-free and
auto-invoked with `{}`.
Signed-off-by: cliffhall <cliff@futurescale.com>
- branchesKey is built from the resolved alternatives themselves, not from
labels and field names: two branches can share both while pinning different
discriminators or typing a field differently, and a reorder of those went
unnoticed — the form then displayed one branch and submitted another.
- InspectorView gains a deep-link test with root-union appArgs: they name the
second branch, and the assertions pin the picker, the read-only
discriminator, THAT branch's default (not the first branch's), and the
absence of the other branch's field. The old shallow spread fails it.
Signed-off-by: cliffhall <cliff@futurescale.com>
The cross-branch agreement check ignored `const`, so two branches pinned to
`1` and `"1"` both stated no `type`, both matched the text `1`, and
the first one's typed constant was sent. Textually indistinguishable constants
of different types are ambiguous, and the raw string the user typed is the
honest answer.
Signed-off-by: cliffhall <cliff@futurescale.com>
- The seeding effect re-applies constants as well as filling absences: an
in-place schema change can move a `const` the user cannot edit, and the
read-only field then displayed the new value while `values` still held the
old one — which is what would be submitted. Ordinary defaults are still only
ever added, so an edited field keeps what the user put there.
- hasMissingIn checks own-property presence: a required argument legally named
`constructor` resolved to the inherited one and read as supplied, enabling
a submit the schema rejects.
- The TUI keeps the declared name as a branch field's fallback title. The
prefix is an internal field NAME, and buildFields labels from its map key —
so the showcase displayed `__b0__address` where the schema says
`address`.
Signed-off-by: cliffhall <cliff@futurescale.com>
`branchIndex` is a position, and a tool refreshed in place keeps its
`resetKey` — so a union reordered or rewritten with the same number of
branches left the index pointing at a different shape than the one the values
describe: the picker showed SMS while Execute submitted the email arguments.
The selection is now re-derived from the values whenever the alternatives
themselves change, keyed by their labels and declared fields.
Signed-off-by: cliffhall <cliff@futurescale.com>
- The seeding effect is keyed by the fixed values themselves as well as the
entity and branch. A tool refreshed in place keeps its `resetKey` and its
branch while its schema changes underneath, so a newly pinned field was
rendered read-only and never seeded — leaving a required one permanently
unsubmittable. The schema object's identity says nothing (callers rebuild it
every render), which is why the key is derived from what has to be seeded.
- branchLabel stringifies every primitive constant. `hasDiscriminator`
accepts distinct booleans and nulls, so a `true`/`false` union was
discriminated perfectly well and still labelled "Option 1"/"Option 2".
Signed-off-by: cliffhall <cliff@futurescale.com>
- A `const` may be an object or an array, with or without a `type`, and
`String({...})` is "[object Object]" — which no CLI argument can equal, so
the only value such a schema accepts never matched. Supplied text is parsed
and compared structurally through the resolver's own comparison (exported as
`sameJsonValue` so the two cannot disagree), for both branch selection and
the substitution.
- The TUI's one-option const control is never marked required: its option may
legitimately be the empty string, which ink-form's required gate can never
accept, so submission would not even reach `decodeFormValues`. The value is
fixed by the schema, and `missingRequiredFields` still validates the call.
Signed-off-by: cliffhall <cliff@futurescale.com>
The carry filter dropped a name whose value was `undefined`, but clearing a
number or JSON field leaves exactly that: the name present with no value, which
is the user's answer rather than an absence. The incoming branch's defaults
then put the field's default back and undid the clear. Own-property presence
alone is now the test.
Signed-off-by: cliffhall <cliff@futurescale.com>
- coercionProperties collapses each declaration before comparing types. A
nullable schema written as an `anyOf` states no top-level `type`, so
`number | null` and `boolean | null` both read as "no type" and counted
as agreeing — and `value=true` then came back as `NaN` through the first
branch's number.
- admitsNull reads an `enum` offering null, under the same sibling conditions
a `const: null` answers to. Without it `{ enum: [null] }` reported that it
rejects null, and a required read-only field spelled that way stayed
permanently invalid.
Signed-off-by: cliffhall <cliff@futurescale.com>
- convertToolParameters defines its result keys rather than assigning them, so
a discriminator legally named `__proto__` reaches the call instead of the
prototype setter. It also collapses a nullable declaration before dispatching,
so `type: ["number","null"]` coerces as a number rather than being sent
as text.
- typeNameOf sorts an array `type`: JSON Schema reads it as a SET, so
`["number","null"]` and `["null","number"]` are one declaration
and must not read as branches disagreeing.
- nullableUnion's non-asserting keyword set covers `$defs`, `$id`,
`$schema`, `$anchor`, `$dynamicAnchor` and `$vocabulary` — they
identify or declare rather than assert. `$ref` stays out: it applies
whatever it points at.
Signed-off-by: cliffhall <cliff@futurescale.com>
Rendering every `const` read-only assumed the caller had already seeded it,
which SchemaForm never did itself: `InlineElicitationRequest` passes its
values straight through and gates submit on hasMissingRequiredFields, so a
required `const` — a root union's discriminator among them — was displayed
and never supplied, leaving Submit disabled with no way to fix it.
The form now reports the fixed values upward once per entity, in an effect (the
parent's `onChange` cannot be called during our render), adding only names
absent from `values` — so a caller that already seeds sees no call at all and
the report cannot loop.
Signed-off-by: cliffhall <cliff@futurescale.com>
One conflict, in SchemaForm's `resetKey` reset: #2138 added the enlarge-caret
Map to clear there while this branch added the union branch selection. Both
belong in it, so the merged block clears the carets and re-derives the branch
from the incoming values.
Signed-off-by: cliffhall <cliff@futurescale.com>
Step 1 of the v2.4.0 release: the bump lands on v2/main before the
milestone merge, so v2/main is never left behind main afterwards.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013hzwzS8UvBsr4yZm7o7sev
Signed-off-by: cliffhall <cliff@futurescale.com>
The README claimed both showcase tools rendered nothing but the Execute Tool
button, which the PR's own screenshots contradict: `echo` carries a root
`message` and rendered that one field, so it was callable with half its
arguments; only `get_weather`, whose fields live entirely on its `oneOf`,
rendered no controls at all. The two now show the two halves deliberately.
Signed-off-by: cliffhall <cliff@futurescale.com>
Two more from review, both about field data the schema controls.
The caret record was a bare object keyed by field name, and field names
come from a server's schema. A field legitimately named `constructor` or
`toString` read back an inherited function rather than undefined, so the
documented end-of-value fallback never fired and that value reached
setSelectionRange. Use a Map, which has no such keys.
JSON Schema counts maxLength in Unicode code points; String.length counts
UTF-16 code units. A field holding one emoji measured 2, so a maxLength:2
field with room for another character was treated as full and refused its
newline. Count code points. The maxLength handed to the DOM input still
carries the HTML attribute's own UTF-16 counting; that predates this and
is left alone.
Signed-off-by: cliffhall <cliff@futurescale.com>
`anyOfAdmitsNull` sent every non-object member to `toBranch` and refused it,
so `{ const: null, anyOf: [true] }` read as non-nullable — a required field
seeded and rendered read-only as `null` and reported missing forever. `true`
is the unconstrained schema and admits every value, `null` among them;
`false` admits none and still does not.
Signed-off-by: cliffhall <cliff@futurescale.com>
- anyOfAdmitsNull recognizes a branch that constrains nothing (`{}`, or
annotations only): it admits every value, null among them, so a field pinned
to `const: null` beside such a union stays submittable. `admitsNull`
cannot say that on its own — an unconstrained schema tells it nothing either
way and it declines rather than guesses — but here the question is narrower.
- convertToolParameters sends a matched `const` as the schema's own typed
value: `kind=2` selects a branch pinned to `const: 2` and was then sent
`"2"`, which that same branch rejects. Only an exact match is
substituted; anything else is the user's input and is left alone.
Signed-off-by: cliffhall <cliff@futurescale.com>
Two faults in the Enter path, both found in review.
The split read `values[fieldName] as string`, a cast over a
Record<string, unknown> fed by whatever a server's schema declares. A
string field holding a non-string default renders as text and then threw
on `.slice`, so one keystroke crashed the panel. Read the control's own
value instead: always a string, and the exact string the selection
offsets index into.
The caret was recorded only when the newline fit, so pressing Enter mid
value in a field at its maxLength enlarged without one and threw the
caret to the end — a second surprise on top of the newline that did not
arrive. Record it on both paths, `start + 1` after an insertion and
`start` otherwise.
Signed-off-by: cliffhall <cliff@futurescale.com>
JSON Schema's boolean form is legal, but only `true` is harmless: it
constrains nothing, while `false` admits no value at all — so a field
declared with it can never be filled, and a required one makes the whole
branch unsatisfiable. Offering it contradicted every other faithfulness check
in the resolver, so such a branch is declined.
Signed-off-by: cliffhall <cliff@futurescale.com>
isComposing covers browsers that fire compositionend after the
committing keydown. WebKit is reported to fire it before, which leaves
isComposing already false and the CJK user back to a stray newline on
every committed word.
Also reject keyCode 229, the pre-isComposing sentinel for a keydown the
IME consumed, which such an event still carries. Deprecated, and kept
anyway: nothing non-deprecated distinguishes that event, and it cannot
swallow a real Enter, which reports 13 — tested both ways so the
sentinel is provably not eating ordinary keystrokes.
The ordering claim is second-hand; the guard is taken on its own merits,
since its downside is bounded at zero and it covers any browser whose
composition events land too late rather than one vendor.
Signed-off-by: cliffhall <cliff@futurescale.com>
- selectBranchIndex asks the supplied NAMES first and falls back to a lone
agreeing constant only when they settle nothing. A matching `const` does
not identify a branch while another candidate leaves that property unpinned:
`{ kind: "email", phone: "555" }` agrees with an email branch whose
`address` is missing while satisfying a phone branch outright.
- isOfferable requires every property VALUE to be readable — JSON Schema's
boolean form is fine, a `null` or an array is not a schema at all and the
web form dereferences one on the way to choosing a widget. Such a branch is
declined rather than handed on to crash a tool panel that would otherwise
have rendered.
Signed-off-by: cliffhall <cliff@futurescale.com>
The handler carried four guards, a preventDefault and a state
transition inline in the TextInput's props, which is what AGENTS.md
rules out ("NEVER use inline code; instead extract to functions in the
same file"). Name it handleEnlargeKeyDown and put it beside
enlargeWithNewline, where the comment can enumerate why each condition
is there rather than sitting between two JSX props.
No behavior change.
Signed-off-by: cliffhall <cliff@futurescale.com>
A distinct `const` does not make `oneOf` alternatives mutually exclusive
unless the property carrying it is required: two branches pinning an OPTIONAL
`kind` both match `{}`, so arguments omitting it satisfy more than one
alternative — exactly what `oneOf` forbids. The property must now be required
by the root or by every branch.
Also makes `propertiesOf` total (an unreadable `properties` reads as empty,
with a separate predicate for the one caller that must tell them apart), which
removes a row of unreachable `?? {}` fallbacks, and covers the value/type
comparisons the const checks rest on.
Signed-off-by: cliffhall <cliff@futurescale.com>
Enter appended its newline to the end of the value regardless of where
the caret was, so pressing it in the middle of `abc|def` produced
`abcdef` with a trailing blank line rather than splitting the text, and
a selected range was kept rather than replaced. That is a rewritten
value, not just a misplaced caret, and no editor behaves that way.
Split at the field's own selection and replace any selected range, then
mount the text area with the caret just after the inserted newline —
EnlargedStringField takes an explicit caretAt for this. Pointer
activation passes none and keeps falling back to end-of-value, since a
click carries no meaningful position. The maxLength check now prices the
resulting value, so replacing a selection can free the room the newline
needs.
The two maxLength tests were asserting against a stub onChange, which
froze the value and made "it did not change" pass whatever the component
did. They now run on a seeded stateful harness, with a no-maxLength
control so the constraint is shown doing the work.
Signed-off-by: cliffhall <cliff@futurescale.com>
Enter is also how a Japanese, Chinese or Korean input method commits the
candidate being composed. That keystroke means "accept this word", not
"new line", so the shortcut fired on every word such a user finished —
enlarging the field and inserting a stray newline each time.
Guard on event.nativeEvent.isComposing. The test pairs the composing case
with a negative control dispatching the same event with the flag off, so
a test that stopped reaching the handler cannot pass for the wrong reason.
Signed-off-by: cliffhall <cliff@futurescale.com>
- matchesConstants checks own-property presence before reading a supplied
value, so an absent argument legally named `constructor` no longer reads the
inherited one and rules out every branch pinning that name.
- anyOfAdmitsNull asks `admitsNull` about each composition-free branch instead
of testing `type` alone, so a branch spelling its nullability as
`{ const: null }` or `{ nullable: true }` is recognized. Refusing composed
branches is what bounds the recursion.
- Drop a double cast from the malformed-applicator fixture.
Signed-off-by: cliffhall <cliff@futurescale.com>
The App deep link seeded defaults and spread its `appArgs` over them, which
replaces a nested object wholesale: `{ config: { kind: "sms" } }` discarded
the nested SMS branch's own defaults, which the form then displayed while the
submitted arguments omitted them. New seedSchemaValues merges the two per
level, picking each nested branch from the nested values, and the supplied
value still wins wherever the two meet.
Signed-off-by: cliffhall <cliff@futurescale.com>
collectSchemaDefaults recursed only when a nested object declared `properties`
directly, so one keeping its fields on a composition branch was skipped — while
SchemaForm rendered that branch and displayed its read-only discriminator. The
constant was shown and never submitted, and the server rejected the call. The
recursion now gates on declaresAnyFields.
Signed-off-by: cliffhall <cliff@futurescale.com>
- rootUnion reads every composition keyword through `membersOf` and every
`required` through `requiredOf`. These schemas describe the wire and each
member arrives as `unknown`, so `anyOf: {}` or `required: "x"` really
can arrive — and reading them as lists threw, taking all three clients down
rather than declining one malformed tool. Both web and TUI required-field
checks are guarded the same way.
- admitsNull evaluates a sibling `anyOf` beside a `const: null` instead of
refusing outright: the union decides in both directions, and
`{ const: null, anyOf: [{ type: "null" }] }` admits null as plainly as an
all-string union rejects it. Refusing it left a read-only required field
seeded with the only value it accepts and submit permanently disabled.
Signed-off-by: cliffhall <cliff@futurescale.com>
hasMissingRequiredFields treated every empty string as missing, so a required
field the schema pins to `""` — rendered read-only, and seeded with the only
value it accepts — left Execute and Open App permanently disabled. It now
matches the TUI check: an empty string counts as supplied when the property's
own `const` pins it there, and an ordinary blank required string still does
not.
Signed-off-by: cliffhall <cliff@futurescale.com>
- TUI missingRequiredFields treats an empty string as supplied when the
property's own `const` pins it there. The one-option control cannot produce
anything else, so reporting the seeded value as missing made such a branch
permanently uncallable.
- A nested SchemaForm is reset by the branch-aware key too. Two outer
alternatives can both carry the same nested object field, and a nested form
left mounted across an outer switch kept displaying the inner branch chosen
for the other one while the newly seeded values described another shape.
Signed-off-by: cliffhall <cliff@futurescale.com>
- The name-based narrowing is extracted as `narrowBySuppliedNames` and used
by the CLI coercion as well as the form: an undiscriminated union whose
branches type a shared name differently was losing the coercion for every
argument, including the ones that identify the branch unambiguously. The
type-agreement fallback now also polls only the const-compatible branches.
- TUI missingRequiredFields accepts `null` only where the property admits it,
matching the web gate: branch fields are rendered optional, so a
`default: null` on a non-nullable required field reached the check and the
call went out with a value the schema rejects.
Signed-off-by: cliffhall <cliff@futurescale.com>
- selectBranchIndex no longer stops when several branches share the supplied
constant. A branch is dropped only when a supplied value CONTRADICTS one of
its constants; the required-field and exclusive-name passes then run over the
remaining candidates, so { version: 1, phone: "555" } resolves to the SMS
branch instead of falling back to the first.
- hasMissingRequiredFields counts only the branches the values could be making
(new branchAcceptsValues): { kind: "sms", address: "x" } supplies
everything the EMAIL branch requires while contradicting its discriminator,
and would otherwise enable a submit the server refuses.
- convertToolParameters ignores a malformed property declaration when branches
agree on a type, rather than storing a non-schema as the coercion schema.
Signed-off-by: cliffhall <cliff@futurescale.com>
- rootUnion: a merged declaration pairing a `const` with an assertion this
module cannot evaluate (`minimum`, `pattern`, …) is declined. Proving the
conjunction safe is the requirement, not disproving it — `minimum: 10`
beside `const: 1` is as unsatisfiable as a type mismatch.
- declaresAnyFields counts a `$ref`: its shape is unknown rather than empty,
so `anyOf: [{ $ref }, { $ref }]` no longer reports an App tool as
input-free and auto-invokes it with `{}`.
- SchemaForm keys its draft-holding fields by the active branch as well, so a
half-typed `-` or an unparsed JSON draft cannot survive a switch into a
same-named field of the incoming branch — with both parent values
`undefined`, nothing else tells the field the entity changed.
Signed-off-by: cliffhall <cliff@futurescale.com>
- rootUnion: the added-names guard is now a shared `addsForbiddenNames` and
applies to the `allOf` fold as well as to union branches. A member adding a
name a restrictive root `additionalProperties` rejects would otherwise be
merged beside the keyword, where the name reads as allowed.
- selectBranchIndex tests `Object.hasOwn` before reading a pinned value: a
field legally named `constructor` resolved to the inherited one and ruled
out the very branch that pins it.
Signed-off-by: cliffhall <cliff@futurescale.com>
- rootUnion: keywords the two declarations state SEPARATELY can contradict too.
A merged `const` is now checked against its own `type` and `enum`, so
root `x: { type: "string" }` under branch `x: { const: 1 }` declines
instead of seeding an immutable 1 into a string field. An integer const still
satisfies a `number` type — the one direction JSON Schema widens.
- TUI missingRequiredFields tests `Object.hasOwn` first: an argument legally
named `constructor` resolved to the inherited one and read as supplied, and
the call went out without it.
Signed-off-by: cliffhall <cliff@futurescale.com>
collectSchemaDefaults assigned by name, so a legal field called `__proto__`
went to the legacy prototype setter instead of the result. A required one
pinned by `const` would then render read-only and be seeded with nothing,
leaving submit permanently disabled. Seeded through defineProperty now, the
way the other schema-record paths already build their maps.
Signed-off-by: cliffhall <cliff@futurescale.com>
applySchemaConstants only corrected top-level pinned fields, but the deep
link's overlay replaces a nested object wholesale rather than merging into it —
so `{ config: { kind: "sms" } }` slipped past a nested read-only
`kind: { const: "email" }` the form was displaying. It now recurses into
object-valued properties, resolving each one's own root union the same way.
Signed-off-by: cliffhall <cliff@futurescale.com>
- selectBranchIndex compares a discriminator structurally: a `const` may be
an object or array, and deep-link arguments arrive as freshly parsed
instances that could never be reference-equal to the schema's own.
- New applySchemaConstants, applied by InspectorView AFTER the deep link's
`appArgs` are spread over the seeded defaults. The form renders a pinned
field read-only, so a link disagreeing with one would otherwise auto-open an
App with a hidden value contradicting the shape on screen.
Signed-off-by: cliffhall <cliff@futurescale.com>
- rootUnion: schema values are compared through a key-sorted rendering, so two
discriminator constants written as {a,b} and {b,a} are recognized as the same
value rather than as mutually exclusive alternatives.
- selectBranchIndex: after the const and required passes, a name only ONE
alternative declares identifies that alternative; a name several declare is
ambiguous and says nothing.
- additionalProperties counts as restrictive only when its schema states an
assertion — an annotation-only `{ title: ... }` is the equivalent of
`true`, like `{}`.
- Drop the unjustified double casts from the ToolTestModal fixtures; the
schemas are assignable to Partial<Tool> as written.
Signed-off-by: cliffhall <cliff@futurescale.com>
- rootUnion: a `oneOf` demands that EXACTLY one alternative match, which
flattening cannot preserve, so it is offered only when a discriminator makes
the alternatives mutually exclusive; `anyOf` makes no such claim and is
unaffected. An empty `additionalProperties` schema is the equivalent of
`true` and no longer declines a union.
- selectBranchIndex: falls back to the branch whose own required fields the
values supply, so an undiscriminated union's values open the picker on the
shape they describe rather than on the first branch.
- admitsNull: honors a sibling `nullable: true` beside `const: null`.
- SchemaForm: a value is carried only where the incoming branch leaves the
root's declaration as it found it; anything it declares itself is reset,
since it may type the name differently from where the value was typed.
`hasOwn`/`fromEntries` throughout, so `constructor` is not read as a
supplied value and `__proto__` is not dropped into the prototype setter.
- TUI: the same prototype-safe construction on the way out of the form, and
the chosen branch's `required` list is checked at submit — rendering a
branch's fields optional makes the FORM satisfiable, not the call, so the
missing names are reported rather than a known-invalid call being sent.
Signed-off-by: cliffhall <cliff@futurescale.com>
- rootUnion: decline a union that adds fields under a restrictive root
`additionalProperties`. The keyword constrains what its SIBLING
`properties` does not name, so the original schema admits none of the
branch fields; flattening moves them beside the keyword, where they read as
allowed and the form would submit what the schema forbids.
- `default` joins the annotation set: it constrains nothing, so two
declarations suggesting different initial values no longer conflict.
- Property records are read with `Object.hasOwn` and built with
`fromEntries`/`defineProperty`. `properties` is a JSON record, so
`constructor` is a legal argument name that `in` reported as a collision
the root never made, and `__proto__` is one that assignment would drop
into the legacy prototype setter instead of keeping as a field.
- SchemaForm: a value survives a branch switch unless BOTH branches declare
the name. A root argument the outgoing branch merely specialized is still a
root argument in a branch that inherits it, so dropping it erased a valid
value.
Signed-off-by: cliffhall <cliff@futurescale.com>
- rootUnion: union members get the same flattenability test as allOf members,
so a branch whose nested `allOf: [false]` makes it unsatisfiable is no
longer offered as a callable alternative with that constraint erased.
- selectBranchIndex: weigh only the pinned constants the caller SUPPLIED. One
it did not supply is a value this identification exists to seed, so
requiring it meant a deep link naming `kind` alone matched no branch
whenever the branches also pinned, say, a `version`. A supplied constant
that disagrees is still evidence against.
- admitsNull: `const: null` is conjunctive with its siblings, not an
override — `{ type: "string", const: null }` and
`{ const: null, anyOf: [...] }` reject every value, so the claim is made
only where the type and a sibling union leave null on the table.
Signed-off-by: cliffhall <cliff@futurescale.com>
- rootUnion: an `allOf` member is foldable only when it states nothing beyond
what the merge applies (`type`/`properties`/`required` plus annotations),
so a nested `anyOf`, a `not`, or an `additionalProperties` can no longer
be erased along with the keyword; members are checked against the
ACCUMULATED merge, so two of them contradicting each other is caught even
when neither contradicts the root.
- admitsNull: `const: null` admits null, so a required field pinned to it is
no longer seeded with the one value it accepts and then reported missing.
- collectSchemaDefaults takes the values a caller is about to overlay, and
seeds the branch THEY identify — the App deep link passes its `appArgs`, so
branch 0's defaults can no longer sit invisibly under branch 1's arguments.
- The branch inference moves into core as `selectBranchIndex`, shared by the
seeding and the form's picker so the two cannot disagree.
Signed-off-by: cliffhall <cliff@futurescale.com>