Admin Page Layout Routing

Admin page layout routing

Overview

This skill is the admin persona's companion to v1.2's headline tool, sfi.layout_for_user. The admin's first-line question is some shape of "user X reports they're seeing the wrong layout (or wrong record type, or missing fields) on object Y" — and the honest answer is a cascade of independent routing rules (profile layout assignment for the requested record type → profile default record type resolution → Master fallback → permission-set record-type visibility note), where each step either matches a layout, fails to match, or admits the metadata model cannot tell. This skill teaches Claude how to drive the tool, present the cascade, and turn unknown and null verdicts into manual-check recommendations rather than fabricated layout IDs.

The cascade consumes three v1.2 edge types and two extracted Profile properties. The edges are parentOf (CustomObject → RecordType, emitted by the v1.2 RecordType extractor), references (RecordType → BusinessProcess, when the record type binds to a stage progression on Lead/Opportunity/Case), and parentOf (CustomObject → Layout, emitted in v0.1). The Profile properties are layoutAssignments and recordTypeVisibilities (with the default=true flag the cascade uses for default-record-type resolution). Both are extracted at confidence: 'declared'.

layoutAssignments is an ARRAY, not a map — each entry mirrors the <layoutAssignments> XML element as { layout, recordType? }. The OBJECT axis is encoded inside layout (Account-Partner Account Layout), and recordType is the BARE {Object}.{RecordTypeName} form with no RecordType: prefix. An entry with recordType absent or null is the object's default ("Master") assignment.

The boundary that matters for admins: Classic layout routing is profile-based in the vault. FlexiPages are also modeled, so sfi.layout_for_user surfaces a Lightning Record Page candidate (flexiPageId / uiSurface) alongside the Classic answer — but never which page a profile is ACTIVATED on. Org-default layouts and app-default routing are not modeled at all, and there is no permission-set axis (Salesforce has none). Point the admin at Setup rather than fabricating.

When to fire

Fire this skill on layout-routing phrasing. Concrete triggers:

• "What layout does user X see for object Y?" — "What layout does Janet see for Account?", "Which page layout for the Sales_Rep profile on Opportunity?", "What's the layout for the System Administrator on CustomObject:Account?".
• "Which page layout for profile X on object Y?" — "Page layout for Profile:Marketing_User on Affiliate__c?", "What layout is assigned to the Sales Manager profile for Case?".
• "Why is this user seeing this layout / wrong layout?" — "Sarah opened an Opportunity and says the fields look wrong", "Why is the rep seeing the Partner layout on Account?", "User reports they're missing the Notes field on Case."
• "Which record type does profile X default to?" — "What's the default record type for Profile:Sales_User on Opportunity?", "Does the Marketing profile have a default record type for Lead?".
• "What's the layout for record type Y?" — "Which layout is assigned for RecordType:Account.PartnerAccount under Profile:System Administrator?", "What layout fires for the New Business record type on Opportunity?".
• "User reports wrong layout." — natural support-ticket phrasing. "User complaint: Account layout is missing the Industry field on the Partner record type.", "Ticket: Sales rep can't see expected fields on Opportunity."
• "Page layout assignments for profile X." — "Show me the page layout assignments for Profile:Sales_Rep.", "List every layout the Sales User profile maps to."
• "Wrong fields on screen." — translate to a layout question; ask what object and record type the user was on.
• "User can't see field Y on the form." — this is layout routing, not field-level security. The field may simply not be placed on the layout the user's profile maps to.

When NOT to fire

Defer to another skill when:

• "Why can't user X see this record?" — record-level visibility, not layout routing. Defer to admin-sharing-troubleshooting → sfi.why_cant_user_see_record.
• "Why can't the user see field Z on every layout?" — that's field-level security (Field-Level Security), not page layout placement. Defer to business-user-orientation's why-can't-I-do-X intent or answering-org-questions → sfi.get_edges with grantedBy from the field.
• "What fields does this object have?" — a schema lookup. Defer to answering-org-questions → sfi.list_components or sfi.get_component.
• "What breaks if I change this layout?" — cross-component impact. Defer to architect-impact-analysis → sfi.get_impact.
• "Which Lightning record page does {profile} see for {object}?" — FlexiPages ARE extracted (FlexiPage: nodes carry sobjectType, pageType, masterLabel, and an explicit activationsModeled: false). Route to sfi.lightning_pages, which lists the pages that EXIST for the object. It accepts profileId / profileApiName ONLY to REFUSE them with the activation-gap pointer rather than silently returning a bare inventory that reads as "this profile is served these pages". Half the question is answerable and half is not; say which half. Do not refuse the whole thing.
• "Which compact layout does this user see?" — RecordType ships compactLayoutAssignment, and v1.2 stores it as a node property, but the sfi.layout_for_user cascade is full-page-layout only. Note the boundary and offer to surface the property via sfi.get_component on the RecordType id.
• A specific record ID question ("what layout does this specific Opportunity 006xx0000012345 show?"). v1.2 has no record-level data; the answer needs the record's recordTypeId. Translate to the object + record type shape (asking for the record type explicitly) or refuse.
• The user wants Lead-conversion or implicit-conversion layouts — those are not modeled in v1.2. Refuse honestly; point to Setup → Lead Settings.

Steps

Walk these in order. Each step has a definite output that feeds the next.

Step 1 — Parse the question into (profile, object, [recordType])

The tool needs three pieces. The user almost never types them in canonical form:

The input schema is FLAT — there is no recordContext / userContext envelope and no permissionSetIds. Every key sits at the top level:

• objectApiName — REQUIRED, and the only strictly required key. Bare API name (e.g., Account, Opportunity, Custom_Object__c). An object the vault doesn't know surfaces as an unknown LayoutAssignment step, not a Zod rejection.
• profileId / profileApiName / profileName / profile — interchangeable selectors for the profile; at least one is required (none → invalid-query). Each accepts either a bare api name (Standard User) or a canonical Profile:{ProfileName} id, and is coerced to the canonical form. Profile names may contain spaces; preserve them. Two selectors that name DIFFERENT profiles → invalid-query, never a silent pick.
• recordTypeId — optional. Canonical form RecordType:{ObjectApiName}.{RecordTypeName} (e.g., RecordType:Account.PartnerAccount). The bare {Object}.{RecordTypeName} form also resolves — the tool strips the RecordType: prefix before comparing against the profile's <layoutAssignments>, which store the bare form. When omitted, the cascade resolves the profile's default record type for the object.

If any required piece is missing — including the user supplying a user name instead of a profile id, or naming a record type by business label without an API hint — ASK before firing the tool. v1.2 does not extract User records, so the user-to-profile mapping is not in the graph; the admin must look it up in Setup → Users. Good clarifying questions:

• "What's the user's profile? v1.2 doesn't extract User records, so I can't translate from jsmith@example.com to a profile id."
• "Which record type are they working with — or any? I can resolve the profile's default if you leave it open."
• "Are they on the Master record type, or a configured one?"

If the user names a profile by display label rather than API name ("Sales User"), translate via sfi.list_components({ type: 'Profile' }) or sfi.search_components({ query: 'Sales User', types: ['Profile'] }) to confirm the canonical id before firing.

Step 2 — Call sfi.run_analysis with { "name": "sfi.layout_for_user", "args": { … } }

Default invocation, full triple:

{
  "objectApiName": "Account",
  "recordTypeId": "RecordType:Account.PartnerAccount",
  "profileApiName": "System Administrator"
}

Default invocation, no record type (let the cascade resolve the profile default):

{
  "objectApiName": "Opportunity",
  "profileId": "Profile:Sales_User"
}

There is no permission-set input. Salesforce has no per-permission-set layoutAssignments, so the tool models no such axis — a permissionSetIds key is not part of the contract.

The response shape (per the v1.2 contract):

{
  "data": {
    "appliedScope": {
      "profileId": "Profile:System Administrator",
      "objectApiName": "Account",
      "recordTypeId": "RecordType:Account.PartnerAccount"
    },
    "layoutId": "Layout:Account.Partner Account Layout",
    "flexiPageId": "FlexiPage:Account_Record_Page",
    "uiSurface": "lightning-flexipage",
    "recordTypeUsed": "Account.PartnerAccount",
    "reasoning": [
      { "stage": "ProfileLookup",         "verdict": "matched", "reason": "profile resolved: Profile:System Administrator" },
      { "stage": "LayoutAssignment",      "verdict": "matched", "reason": "layoutAssignment matches (object='Account', recordType='Account.PartnerAccount')" },
      { "stage": "RecordTypeResolution",  "verdict": "matched", "reason": "record type 'Account.PartnerAccount' resolved against profile layoutAssignment", "value": "Account.PartnerAccount" },
      { "stage": "LightningPageLookup",   "verdict": "matched", "reason": "FlexiPage 'FlexiPage:Account_Record_Page' models the Lightning record surface for 'Account'", "value": "FlexiPage:Account_Record_Page" }
    ],
    "boundaryNote": "Profile layoutAssignments resolve to Classic layout '…', but the vault models Lightning FlexiPage '…' for this object — users in Lightning Experience typically see the FlexiPage."
  }
}

Stages. stage is one of exactly five: ProfileLookup, LayoutAssignment, RecordTypeResolution, LightningPageLookup, Default. Four of those five are emitted by the handler; Default is declared in the type but has zero emission sites — if you ever think you are looking at a Default step, you are looking at something you invented. There are no ProfileLayoutAssignment / ProfileDefaultRecordType / MasterFallback / PermissionSetRecordTypeVisibility stages.

Verdicts. verdict is one of exactly four: matched, fallback, unknown, not-found. There is no no-match, no resolved, no no-default, no visible, no extends-visibility.

Step keys. A step has stage, verdict, reason, and an optional value (the resolved layout / record-type / FlexiPage id when the verdict is matched or fallback). There is no rule, no note, no per-step layoutId, no per-step profileId / objectApiName / recordTypeId — those live once, at the top level, in appliedScope.

Cascade order. ProfileLookup → LayoutAssignment → RecordTypeResolution (only when LayoutAssignment produced a match) → LightningPageLookup. An unknown profile short-circuits after ProfileLookup with a single not-found step. A profile whose extracted properties carry no layoutAssignments short-circuits after LayoutAssignment with unknown.

Top-level fields. appliedScope echoes the profile / object / record-type the tool actually resolved (check it — it is how you know an alias you passed was honored). layoutId is the Classic layout or null. flexiPageId is the Lightning record page or null. uiSurface is classic-layout | lightning-flexipage | unknown and is the field that answers "what does the user actually see". boundaryNote is present only when a Classic layout resolved but a FlexiPage also exists — surface it verbatim when it appears.

Note that recordTypeUsed and a RecordTypeResolution step's value carry the bare {Object}.{RecordTypeName} form (that is what the profile XML stores), not the RecordType:-prefixed canonical id.

Step 3 — Walk the cascade and present each step

The raw reasoning[] array is the right shape for human reading: a bulleted timeline of stages, each with its rule, verdict, and reason. Walk the array in order and surface every step — including the ones that returned unknown or not-found. Do not silently drop steps because they "didn't change the answer." They're load-bearing for admin trust; the trace is what the admin will rely on when they go change the assignment in Setup.

For each step:

• State the stage verbatim (ProfileLookup, LayoutAssignment, RecordTypeResolution, LightningPageLookup).
• State the verdict verbatim (matched, fallback, unknown, not-found).
• State the reason in English (quote it, plus any canonical IDs like Layout:Account.Partner Account Layout, Profile:Sales_User, FlexiPage:Account_Record_Page).
• If the verdict is unknown, recommend the manual check explicitly, grounded in the step's reason — e.g., "verify the page layout assignment in Setup → Profiles → Profile:Sales_User → Page Layout Assignment for Opportunity", or "confirm the record type default in Setup → Profiles → Profile:Marketing User → Record Type Settings."

Step 4 — Present the bottom-line layout decision

After the trace, give the top-level decision in one sentence, plain language. Three shapes:

• Matched (layoutId is non-null): "Profile:Sales_User on Opportunity with RecordType:Opportunity.New_Business sees Layout:Opportunity.New Business Opportunity Layout."
• Null with unknown step: "v1.2 cannot tell which layout Profile:Marketing User sees for (Affiliate__c, Premium) — no layoutAssignments entry was extracted for this tuple. Verify in Setup → Profiles → Profile:Marketing User → Page Layout Assignment for Affiliate__c."
• Null with no unknown step (rare; the profile resolved and an assignment list existed, but nothing targeted this object): "v1.2's extracted assignments do not cover (Object, RecordType) for this profile. Either the profile has no assigned layout (Salesforce will fall back to the org-default layout — not modeled in v1.2) or the assignment was not extracted. Verify in Setup."

Use canonical IDs in the bottom-line sentence so the admin can act on them.

Step 5 — When the verdict is non-null, surface the boundary too

Even when layoutId is non-null and the trace looks complete, always append the v1.2 boundary disclosure (see Boundary disclosure below). The admin's protection against the wrong mental model is naming what the cascade doesn't model.

The single highest-value thing to surface here is uiSurface. When it is lightning-flexipage, the Classic layoutId you just traced is probably NOT what the user sees — quote boundaryNote verbatim and lead with the FlexiPage.

Step 6 — Recover from not-found errors

An unresolvable profile is not an error envelope. The tool returns a SUCCESSFUL response whose reasoning[] is a single step { stage: 'ProfileLookup', verdict: 'not-found', reason: 'profile not found: Profile:Sale_Rep' }, with layoutId, flexiPageId and recordTypeUsed all null and uiSurface: 'unknown'. Read that shape as "the profile does not exist", never as "this profile has no layout".

(The tool DOES return { error: { kind: 'invalid-query' } } for the two input-shape failures: no profile selector at all, and two selectors that name different profiles.)

Recovery move: call sfi.list_components({ type: 'Profile' }) to enumerate the extracted Profile ids, surface the closest matches, and ask the admin which one they meant. Do not guess a profile id from a partial label; profile names are bespoke per org.

Reporting format

Worked example. Use the synthetic-v1.2 fixture conventions (Profile:System Administrator, RecordType:Account.PartnerAccount, Layout:Account.Partner Account Layout, RecordType:Opportunity.New_Business, RecordType:Affiliate__c.Premium, Profile:Marketing User).

User: "What layout does the System Administrator profile see for the Partner Account record type on Account?"

Claude's flow:

1. Parse → profileId: 'Profile:System Administrator', objectApiName: 'Account', recordTypeId: 'RecordType:Account.PartnerAccount'. All three present.
2. Call sfi.run_analysis with { "name": "sfi.layout_for_user", "args": { … } } with the triple.
3. Receive (illustrative):

{
  "data": {
    "appliedScope": {
      "profileId": "Profile:System Administrator",
      "objectApiName": "Account",
      "recordTypeId": "RecordType:Account.PartnerAccount"
    },
    "layoutId": "Layout:Account.Partner Account Layout",
    "flexiPageId": null,
    "uiSurface": "classic-layout",
    "recordTypeUsed": "Account.PartnerAccount",
    "reasoning": [
      { "stage": "ProfileLookup",        "verdict": "matched", "reason": "profile resolved: Profile:System Administrator" },
      { "stage": "LayoutAssignment",     "verdict": "matched", "reason": "layoutAssignment matches (object='Account', recordType='Account.PartnerAccount')" },
      { "stage": "RecordTypeResolution", "verdict": "matched", "reason": "record type 'Account.PartnerAccount' resolved against profile layoutAssignment", "value": "Account.PartnerAccount" },
      { "stage": "LightningPageLookup",  "verdict": "unknown", "reason": "no FlexiPage in vault targets object 'Account'" }
    ]
  }
}

4. Respond:

Layout routing cascade for Profile:System Administrator on Account with RecordType:Account.PartnerAccount:

• ProfileLookup — matched. Profile:System Administrator resolved in the vault.
• LayoutAssignment — matched. A layoutAssignments entry targets (Account, Account.PartnerAccount) → Layout:Account.Partner Account Layout.
• RecordTypeResolution — matched. Record type Account.PartnerAccount resolved against that assignment.
• LightningPageLookup — unknown. No FlexiPage in the vault targets Account, so uiSurface is classic-layout.

Bottom line: Profile:System Administrator on Account with the Partner Account record type sees Layout:Account.Partner Account Layout.

v1.2 layout routing covers profile layoutAssignments, profile recordTypeVisibilities (for default-record-type resolution), and the Master record-type fallback. It does not resolve layout assignments through permission sets — Salesforce does not support per-permission-set layoutAssignments. It does not model compact layouts or record-row-level routing. Lightning record pages ARE modeled: the LightningPageLookup stage resolves a FlexiPage for the object (matching the page's declared sobjectType, falling back to an apiName prefix). But WHICH page a given profile is ACTIVATED on is not in the metadata at all — when an object has several record pages the tool makes a deterministic pick, not the right one. A matched flexiPageId names a plausible Lightning surface, never a proven per-profile assignment. Confirm in Setup → Object Manager → Account → Lightning Record Pages.

Every step appears with its verdict. The bottom-line cites canonical IDs. The boundary disclosure is unskippable.

Counter-example — honest refusal (Q30 anchor)

User: "What layout does the Marketing User profile see for the Premium record type on Affiliate__c?"

Claude's flow:

1. Parse → profileId: 'Profile:Marketing User', objectApiName: 'Affiliate__c', recordTypeId: 'RecordType:Affiliate__c.Premium'.
2. Call sfi.run_analysis with { "name": "sfi.layout_for_user", "args": { … } }.
3. Receive (illustrative):

{
  "data": {
    "layoutId": null,
    "recordTypeUsed": "RecordType:Affiliate__c.Premium",
    "reasoning": [
      { "stage": "ProfileLookup",       "verdict": "matched", "reason": "profile resolved: Profile:Marketing User" },
      { "stage": "LayoutAssignment",    "verdict": "unknown", "reason": "no layoutAssignment matches (object='Affiliate__c', recordType='Affiliate__c.Premium')" },
      { "stage": "LightningPageLookup", "verdict": "unknown", "reason": "no FlexiPage in vault targets object 'Affiliate__c'" }
    ]
  }
}

4. Respond:

Layout routing cascade for Profile:Marketing User on Affiliate__c with RecordType:Affiliate__c.Premium:

• ProfileLookup — matched. Profile:Marketing User resolved in the vault.
• LayoutAssignment — unknown. No layoutAssignments entry matches (Affiliate__c, Affiliate__c.Premium) in Profile:Marketing User.
• LightningPageLookup — unknown. No FlexiPage in the vault targets Affiliate__c either, so uiSurface is unknown too.

Bottom line: v1.2 cannot tell which layout Profile:Marketing User sees for (Affiliate__c, RecordType:Affiliate__c.Premium). The profile's layoutAssignments map has no entry for this tuple, and no Master fallback was extracted. Verify manually:

• Setup → Profiles → Marketing User → Page Layout Assignment for Affiliate__c — confirm what's actually assigned for the Premium record type (and for Master).
• If the assignment is configured but the cascade reported unknown, the v1.2 extraction may have missed it. File a /sfi-refresh and re-run.

v1.2 layout routing covers profile layoutAssignments, profile recordTypeVisibilities, and the Master fallback. It does not model permission-set layout assignments, Lightning record pages, app-default routing, compact layouts, or record-row data. layoutId: null is the honest answer — v1.2 cannot tell, and the admin must verify in Setup.

The response names every step. Every unknown is surfaced. The boundary disclosure is verbatim. No layout id is fabricated.

Recovery example — typo in profile id

User: "Which layout does the Profile:Sale_Rep see for Account?"

Claude's flow:

1. Parse → typo'd profile id (Sale_Rep vs the real Sales_Rep).
2. Call sfi.run_analysis with { "name": "sfi.layout_for_user", "args": { … } } — returns a SUCCESSFUL response whose only reasoning step is { stage: 'ProfileLookup', verdict: 'not-found', reason: 'profile not found: Profile:Sale_Rep' }, with layoutId: null, flexiPageId: null, uiSurface: 'unknown'. Not an error envelope — read the not-found STEP.
3. Recover → call sfi.list_components({ type: 'Profile' }). Surface top matches alphabetically close to the typo.
4. Respond:

No Profile:Sale_Rep in the extracted vault. The Profiles closest to that name are:

• Profile:Sales_Rep
• Profile:Sales_Manager
• Profile:Sales_User

Did you mean Profile:Sales_Rep? I'll re-run the cascade once you confirm.

Don't guess. The profile id is the load-bearing input to the cascade.

Boundary disclosure

v1.2's layout routing has well-defined gaps. Surface this list whenever the admin is about to act on the report, and always when any step returned unknown or the top-level layoutId is null:

• Permission-set layout assignments. Salesforce does not support per-permission-set layoutAssignments at all (the metadata model only allows them on Profile), so the tool models no permission-set axis and takes no permission-set input. If an admin has been told "the permission set is overriding the layout," that's not how Salesforce works — the permission set extends record-type visibility, but layout assignment stays with the profile.
• Org-default layouts. Salesforce maintains a fallback layout per object that applies when no profile-specific assignment matches. v1.2 does not model this fallback. When the LayoutAssignment step returns unknown, the org default may still be displaying — check Setup → Object Manager → {object} → Page Layouts → Page Layout Assignment for the authoritative answer.
• Lightning record page ACTIVATION. FlexiPages themselves ARE in the vault, and layout_for_user's LightningPageLookup stage resolves one for the object (surfaced as flexiPageId / uiSurface, with boundaryNote when a Classic layout also matched). What is NOT modeled is the ACTIVATION matrix — which profile / record type / app / form factor is SERVED which page is a separate Lightning App Builder assignment that the retrieved FlexiPage metadata does not carry (the node says so itself: activationsModeled: false). So a non-null flexiPageId is a candidate, never a proven per-profile assignment, and when an object has several record pages the tool's pick is deterministic rather than correct. sfi.lightning_pages enumerates all of them with the same activationDisclosure. Direct the admin to Setup → Object Manager → {object} → Lightning Record Pages to confirm what's actually rendering.
• App-default routing. A CustomApplication can pin particular Lightning pages per record type or per app context. v1.2's CustomApplication extractor tracks tabs (tabs[]) but does not model Lightning page assignments per app. Refuse the question; point to Setup → App Manager → {App} → Edit.
• Compact layouts. RecordType ships compactLayoutAssignment. v1.2 stores it as a property on the RecordType node (properties.compactLayoutAssignment), but sfi.layout_for_user is full-page-layout only. If the admin wants the compact layout for a record type, fetch it via sfi.get_component({ id: 'RecordType:...' }) and surface the property — do not route it through the cascade.
• Implicit-conversion layouts. Lead conversion uses a Lead Conversion Mappings model (LeadConvertSettings) that v1.2 does not extract. If the admin is investigating a Lead-convert layout question, refuse honestly; point to Setup → Object Manager → Lead → Lead Settings → Lead Conversion.
• User → Profile mapping. v1.2 does not extract User records. When the admin supplies a user name, ask for the profile id directly or send them to Setup → Users → {user} → Profile. v1.7's Tooling API tier may surface a synthetic mapping.
• Record-row routing. "Which layout does this specific Opportunity record show?" needs the record's recordTypeId — which is record-level data, out of scope for v1.x. Translate to (object, recordType) shape and disclose the shift, or refuse and point the admin at the record in Salesforce.
• Tab visibility per profile. Profile carries tabVisibilities (extracted in v1.0); v1.2 does not yet produce a tool that walks it. The Q28 inversion (tab-to-app) via belongsToApp is the closest v1.2 capability.

Treat unknown verdicts as a flag for manual investigation, not as denial — on LayoutAssignment it means "the profile's extracted layoutAssignments map has no entry for this tuple", still subject to the org-default-layout caveat above. Treat not-found (only ever on ProfileLookup) as "that profile is not in the vault", never as "that profile has no layout". Treat fallback as a real match reached by a default rather than an explicit assignment — say which default. Treat a non-null layoutId as "v1.2 traced a declared profile assignment" — high trust, but still subject to the Lightning record page in flexiPageId / uiSurface, which the profile metadata does not govern.

Anti-patterns

Example interactions

Happy path — matched layout for a known triple

User: "Which page layout does the System Administrator profile see for Account record type PartnerAccount?"

Claude's flow:

1. Parse → profileId: 'Profile:System Administrator', objectApiName: 'Account', recordTypeId: 'RecordType:Account.PartnerAccount'.
2. Fire sfi.run_analysis with { "name": "sfi.layout_for_user", "args": { … } } with the triple.
3. Present all four steps — ProfileLookup / LayoutAssignment / RecordTypeResolution / LightningPageLookup — with their verdicts and the layout id (see Reporting format above for the full transcript).
4. Bottom line. Layout:Account.Partner Account Layout, qualified by uiSurface.
5. Boundary disclosure. Verbatim — permission sets, Lightning-page activation, compact layouts, org defaults, record-row data.

Default record-type resolution

User: "Which layout does the Sales User profile see for Opportunity when no record type is specified?"

Claude's flow:

1. Parse → profileId: 'Profile:Sales_User', objectApiName: 'Opportunity', recordTypeId omitted.
2. Fire sfi.run_analysis with { "name": "sfi.layout_for_user", "args": { … } }.
3. Receive the cascade. There is no separate default-record-type STAGE — the default resolution happens INSIDE LayoutAssignment, which returns verdict: 'fallback' and a reason naming the default record type it routed through. RecordTypeResolution then reports which axis was used.
4. Respond: present every step, name Layout:Opportunity.New Business Opportunity Layout as the bottom line, and append the boundary disclosure.

Layout routing cascade for Profile:Sales_User on Opportunity (no record type specified):

• ProfileLookup — matched. Profile:Sales_User resolved.
• LayoutAssignment — fallback. No master (recordType: null) assignment for Opportunity; resolved via the profile's default record type Opportunity.New_Business (from the profile's recordTypeVisibilities) → Layout:Opportunity.New Business Opportunity Layout.
• RecordTypeResolution — matched. Record type Opportunity.New_Business resolved against that assignment.
• LightningPageLookup — unknown. No FlexiPage in the vault targets Opportunity.

Bottom line: Profile:Sales_User on Opportunity defaults to Opportunity.New_Business and sees Layout:Opportunity.New Business Opportunity Layout (uiSurface: classic-layout).

[v1.2 boundary disclosure follows.]

Note the two fallback shapes LayoutAssignment can return, and say which one you got: a master assignment matched because the caller named no record type, or no master assignment existed and the profile's default record type routed it.

Honest partial answer — Lightning record page

User: "Which Lightning record page does the Sales rep see on Account?"

Claude's flow:

1. Classify → Lightning record page question. The page INVENTORY is in scope; the per-profile ACTIVATION is not.
2. Split it. Call sfi.run_analysis with { "name": "sfi.lightning_pages", "args": { … } } for the pages that exist on the object; do NOT claim the activation half.
3. Respond:

Half of this is answerable and half isn't, so here's the split.

What the vault has: the Lightning record pages that EXIST for Account, as FlexiPage: nodes — sfi.lightning_pages lists them with their pageType and masterLabel, and layout_for_user resolves one into flexiPageId / uiSurface.

What it doesn't: which page the Sales rep is ACTIVATED on. Profile / record-type / app / form-factor activation is a separate Lightning App Builder assignment that isn't in the retrieved FlexiPage metadata at all — the node records this as activationsModeled: false. I can tell you the candidates; I cannot tell you which one they're served.

To close the activation half:

• Setup → Object Manager → Account → Lightning Record Pages — shows every page assigned to the object, with the per-profile and per-app-and-record-type assignment matrix.
• Or the Lightning App Builder — open the relevant page and review its Activation settings.

I can also run the Classic page layout cascade (sfi.layout_for_user) if that's the surface the rep is actually on — it reports uiSurface so you can tell which one applies.

The response names the v1.2 boundary, points to two concrete Setup paths, and offers the in-scope alternative.

Recovery — typo'd profile id

User: "Layout for Profile:Sale_Rep on Account, please."

See Reporting format above. The cascade returns a SUCCESSFUL response whose only step is ProfileLookup / not-found; recover with sfi.list_components({ type: 'Profile' }) and surface the closest matches. Never read that shape as "this profile has no layout assigned".

Verification

Before sending a response, confirm:

• I translated the user's reference into a canonical profileId (Profile:{ProfileName}), objectApiName (bare API name), and — if supplied — recordTypeId (RecordType:{ObjectApiName}.{RecordTypeName}). I asked the admin for any missing piece before firing.
• If the user supplied a user name (not a profile id), I asked them to look it up in Setup → Users rather than guessing.
• If the user supplied a record-row ID (006xx..., 001xx...), I disclosed the shift and asked for the record's recordTypeId before firing — or refused and pointed to the record in Salesforce.
• I called sfi.run_analysis for sfi.layout_for_user exactly once per triple. (If the admin corrected an input, I re-fired.)
• I presented every step in reasoning[] — including unknown and not-found steps — as a bulleted trace with stage, verdict, and reason, using only the five real stage names and the four real verdicts.
• I read appliedScope and uiSurface off the response, and quoted boundaryNote verbatim when it was present.
• Every unknown step carried a manual-check recommendation naming the specific Setup screen to inspect (e.g., Setup → Profiles → {profile} → Page Layout Assignment for {object}).
• I cited canonical IDs (Profile:..., RecordType:..., Layout:..., CustomObject:...) for every component named.
• I gave the bottom-line decision in one sentence: matched layout id, or null with the reason.
• If the cascade returned a ProfileLookup step with verdict not-found, I called sfi.list_components({ type: 'Profile' }) and surfaced the closest matches rather than guessing — and I did NOT report it as "this profile has no layout".
• If the question was about a Lightning record page, compact layout, lead-conversion layout, or permission-set "layout override," I refused honestly and named the specific Setup screen.
• I appended the v1.2 boundary disclosure — permission-set layouts, org defaults, Lightning record pages, app-default routing, compact layouts, implicit-conversion layouts, user→profile mapping, record-row data, tab visibility.
• I did not present null or unknown as "no layout exists," and I did not fabricate a layout id when the cascade couldn't tell.

Grounding & routing (shared contract). For a vague or broad ask, call `sfi.rout

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