Audit Swiftui API Currency

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name: audit-swiftui-api-currency description: Audit macOS SwiftUI api currency for correctness, current APIs, and production conventions. Use for that domain or as part of a full audit.

Bundled resource root

Let <swiftui-plugin-root> be the absolute plugin directory two levels above this SKILL.md. Resolve that path before running commands or opening shared references. When these instructions say swiftui-ctx, invoke <swiftui-plugin-root>/scripts/swiftui-ctx; do not assume the command is on PATH.

Audit SwiftUI API Currency

AUDIT-ONLY · macOS-only · SwiftUI-only. Run this on a finished or in-progress macOS SwiftUI project to detect — and where certain, fix — every way an API drifts out of currency on a macOS 26 (Tahoe) target: the stale symbol the model learned from a 2019–2022 corpus (NavigationView, .foregroundColor, 1-param onChange), the freshly-deprecated macOS-26.5 call, the renamed gesture, and the hallucinated modifier AI confabulated for a surface it never saw. Findings are written to disk in the toolkit's unified schema; certain mechanical renames are fixed under the fix-safety protocol. This is never a from-scratch modernizer.

Three mechanisms compound: training recency (renames every year; the corpus is the old surface), confident confabulation (an unknown surface yields a plausible invented name, not an admission of absence), and no availability awareness (a macOS-26-only call emitted with no gate). The unifying tell: the code reads idiomatic and usually compiles, so it survives casual review.

Boundary / seam note (stay in lane)

• api-currency owns the deprecation/hallucination flag; the positive replacement craft is a sibling's. Emit cross_ref on every shared seam (<swiftui-plugin-root>/references/_shared/cross-ref-graph.md):
  • .foregroundColor / .accentColor / .cornerRadius craft → audit-swiftui-appearance-color.
  • Text + Text / Font.system(_:design:) craft → audit-swiftui-typography-text.
  • NavigationView / tabItem / inline NavigationLink structural migration → audit-swiftui-navigation-toolbars.
  • 1-param onChange, ObservableObject default → audit-swiftui-state-observation.
  • DispatchQueue.main.async isolation fix → audit-swiftui-async-data / concurrency.
  • Gesture renames mechanics → audit-swiftui-pointer-gestures; dropDestination → audit-swiftui-sandbox-files.
  • Hallucinated glass names + glass design → audit-swiftui-liquid-glass.
• The blanket "is every OS-floored API gated" sweep belongs to audit-swiftui-availability-gating. This skill flags the deprecation; whether a current-but-floored replacement is gated is noted and routed there. The Liquid-Glass design audit (placement, containers, morphing) is out of scope — this skill only flags the hallucinated glass names; route the rest to audit-swiftui-liquid-glass.

The currency model (three failure shapes)

1. Deprecated/renamed — a real symbol Apple superseded; it compiles with a warning today and breaks when the window closes (NavigationView → 26.5; Text + Text → 26.0). Flag + cite the current idiom.
2. Hallucinated — a name that never existed on macOS; a hard-fail. A swiftui-ctx lookup exit 3 (not-found) corroborates it: no shipping Mac app uses the symbol.
3. Ungated current API — the right replacement carries its own macOS floor; using it below the deployment target is a build break. This skill notes it and routes the depth to availability-gating.

Defect index (curr-01 … curr-14)

id · tell · severity · fix · open reference. Severities: hard-fail (never-correct / build break), warning (compiles but stale/deprecated), advisory (smell / judgment). auto = mechanical single-answer rename; flag = show the ✅, dev applies.

id	One-line tell	Sev	Fix	Reference
curr-01	NavigationView { … } (deprecated macOS 10.15–26.5)	warning	flag	deprecations-and-renames.md
curr-02	.foregroundColor(_:) (deprecated → .foregroundStyle)	warning	auto	deprecations-and-renames.md
curr-03	.cornerRadius(_:) (deprecated → .clipShape(.rect(cornerRadius:)))	warning	auto	deprecations-and-renames.md
curr-04	1-param .onChange(of:) { newValue in } (introduced macOS 11, deprecated macOS 14)	warning	flag	deprecations-and-renames.md
curr-05	.tabItem { … } (→ Tab("…", systemImage:) { }, macOS 15)	warning	flag	deprecations-and-renames.md
curr-06	inline NavigationLink(…, destination:) inside List/ForEach	warning	flag	deprecations-and-renames.md
curr-07	Text("…") + Text("…") concatenation (deprecated macOS 26.0)	warning	flag	deprecations-and-renames.md
curr-08	DispatchQueue.main.async cargo-cult in async-aware code	advisory	flag	deprecations-and-renames.md
curr-09	3-arg dropDestination(for:action:isTargeted:) (deprecated macOS 26.5)	warning	flag	deprecations-and-renames.md
curr-10	MagnificationGesture / RotationGesture (renamed macOS 26.5)	warning	auto	deprecations-and-renames.md
curr-11	Font.system(_:design:) design-only, no weight: (deprecated 26.5)	advisory	flag	deprecations-and-renames.md
curr-12	.accentColor(_:) (deprecated macOS 26.5 → .tint(_:))	warning	auto	deprecations-and-renames.md
curr-13	.glassBackground() / .liquidGlass() / LiquidGlassView / .material(.glass) / .cardStyle()	hard-fail	flag	hallucinated-currency.md
curr-14	.glassBackgroundEffect() on a Mac target (visionOS-only)	hard-fail	flag	hallucinated-currency.md

Two claims are version-sensitive — confirm before asserting, never invent: the exact dropDestination successor signature (dropDestination(for:isEnabled:action:)) and any GlassProminentButtonStyle availability; carry as the citation from swiftui-ctx + Sosumi or as source: verify against Xcode 26 SDK.

The real API, at a glance

Deprecated → current (macOS): NavigationView → NavigationStack / NavigationSplitView · .foregroundColor(_:) → .foregroundStyle(_:) · .cornerRadius(_:) → .clipShape(.rect(cornerRadius:)) · 1-param .onChange → (old, new) or 0-param · .tabItem → Tab(){} · inline NavigationLink(destination:) → .navigationDestination(for:) · Text + Text → interpolation / AttributedString · DispatchQueue.main.async → @MainActor / await MainActor.run · 3-arg dropDestination → dropDestination(for:isEnabled:action:) · MagnificationGesture / RotationGesture → MagnifyGesture / RotateGesture · Font.system(_:design:) → Font.system(_:design:weight:) · .accentColor(_:) → .tint(_:).

Hallucinated (never exist on macOS): .glassBackground(), .liquidGlass(), LiquidGlassView, .material(.glass), .background(.glass), .cardStyle(). Real-but-platform-wrong: .glassBackgroundEffect() (visionOS-only). NOT hallucinated — do not flag: Glass.interactive(_:) is macOS 26.0+ and pointer-driven on the Mac.

Grounded ✅ example (the shape step 7 FIX embeds — real code, not a placeholder). For curr-02 (.foregroundColor → .foregroundStyle), swiftui-ctx lookup foregroundStyle --json returns the consensus shape (_) at 100% with recommended permalink below — this is what ## Correct carries:

// ✅ .foregroundStyle(_:) — consensus shape (_), real macOS-26 call site
Circle()
    .stroke(lineWidth: lineWidth)
    .opacity(0.3)
    .foregroundStyle(.secondary)

• Source (real GitHub permalink): sindresorhus/Gifski (8.4k★, min_macos: 26) — https://github.com/sindresorhus/Gifski/blob/7f873856e2acd8b52e6681dee3aec31e6cab23e4/Gifski/Utilities.swift#L5192
• Spec (Sosumi doc:): https://sosumi.ai/documentation/swiftui/view/foregroundstyle
• Re-fetch live with bash <swiftui-plugin-root>/scripts/swiftui-ctx file ex_032f0b9e2b --smart; never hand-write the ✅ — it is always the current swiftui-ctx consensus + its permalinked example.

Floor values are the reconciled truth in <swiftui-plugin-root>/references/_shared/floors-master.md and the canonical invented-name list in <swiftui-plugin-root>/references/_shared/hallucination-blacklist.md — read, never restate them. The canonical ✅ shape + a real macOS-26 example come from swiftui-ctx (step VERIFY/FIX), not a hand-written snippet.

The 8-step audit workflow (execute verbatim)

1. ORIENT. tree / find the SwiftUI sources. Read the deployment target (project.pbxproj MACOSX_DEPLOYMENT_TARGET, or Package.swift platforms:). It governs the gating angle (a current-but-floored replacement must be gated below its floor). Record it.
2. LOCATE. Run the shared hybrid lint runner: bash <swiftui-plugin-root>/scripts/swiftui-lint.sh --skill audit-swiftui-api-currency --dir <sources> --json /tmp/curr.json --sarif /tmp/curr.sarif. It runs this skill's tier-1 grep tells (lint/grep-tells.tsv) + tier-2 structural ast-grep rules (lint/ast-grep/*.yml — the 1-param-onChange shape and the inline-NavigationLink-in-List containment grep can't express), plus a per-file parse probe, and emits unified JSON + SARIF. Read its parse_warnings — a flagged file did not fully parse, so a structural miss can't masquerade as clean; READ those by hand. The runner only LOCATES — never treat a hit as a finding. Engine + rule-file format + degradation: <swiftui-plugin-root>/references/_shared/lint-architecture.md.
3. READ. Open every located file in full — never pattern-match-and-patch blind. A 1-param vs 2-param onChange closure, whether a NavigationLink is inside a List, whether a DispatchQueue.main.async sits in async-aware code, and whether a Font.system already passes weight: are all invisible to a flat grep. Build a per-file inventory: each candidate symbol + its era + its gate.
4. DETECT. Apply the index. Assign each candidate a confidence; report a finding only at 100% certainty (e.g. a literally-deprecated symbol, a verified hallucinated name, a 1-param onChange).
5. VERIFY. For anything ≤ ~70% confidence (a symbol you're unsure exists, a deprecation date or floor you can't place, a successor signature), run both evidence sources. (a) Practice — bash <swiftui-plugin-root>/scripts/swiftui-ctx lookup <api> --json AND, for every currency rule, bash <swiftui-plugin-root>/scripts/swiftui-ctx deprecated <api>: read its consensus (the canonical shape), deprecated+replacement, recommended permalink, introduced_macos, and co_occurs_with. A lookup exit 3 (not-found, with a did-you-mean suggestion) corroborates a hallucination (curr-13/14) — no shipping Mac app uses the symbol. (b) Spec — confirm via Sosumi: curl -sSL https://sosumi.ai/<apple-path> using references/source-directory.md for the path and <swiftui-plugin-root>/references/_shared/sosumi-reference.md for the protocol (never WebFetch developer.apple.com). Cross-check introduced_macos against floors-master.md and the Sosumi doc: floor. The CLI contract is <swiftui-plugin-root>/references/_shared/swiftui-ctx-reference.md. Promote with the citation or discard; carry an unconfirmed successor signature as source: verify against Xcode 26 SDK.
   • Deeper corpus evidence (currency BASELINE). Open the sweep with the corpus deprecation set: bash <swiftui-plugin-root>/scripts/swiftui-ctx deprecated --json (no arg) or bash <swiftui-plugin-root>/scripts/swiftui-ctx insights deprecated — the deprecated APIs real Mac apps STILL ship, with repo counts (e.g. .foregroundColor/curr-02 in 1,119 repos, NavigationView/curr-01 in 257). Use it to rank which curr-IDs to hunt first and to ground each finding's era ("still shipped by N repos"), per _shared/swiftui-ctx-reference.md.
6. REPORT. Write each confirmed finding (output contract below). One finding per file, zero-padded, ordered. Write the run's _index.md.
7. FIX. Apply corrections under the fix-safety protocol (<swiftui-plugin-root>/references/_shared/fix-safety-protocol.md): clean-tree gate, findings-first, only fix_mode: auto (curr-02/03/10/12 — the pure mechanical renames), one conventional commit per finding citing its rule_id, never weaken a check. The ✅ "Correct" is not a hand-written snippet — it is the swiftui-ctx consensus shape put in ## Correct, backed by a real macOS-26 example fetched with bash <swiftui-plugin-root>/scripts/swiftui-ctx file <recommended.id> --smart whose GitHub permalink (plus the Sosumi doc:) goes in ## Source as the canonical example. Leave flag-only findings open with that ✅ in ## Correct.
8. DOUBLE-CHECK. Re-grep each fixed file to confirm the tell no longer matches; record the evidence in ## Fix applied?. Re-confirm every citation still resolves. If a fix introduced a new tell (e.g. a .foregroundStyle replacement that now needs a macOS-12 gate below the floor), loop that file back to DETECT and route the gating note to availability-gating.

Confidence gating (load-bearing)

Report a finding only at 100% certainty. Anything ≤ ~70% goes to VERIFY (step 5) before it can become a finding — never emit a speculative finding. Auto-fix only the mechanical rename set (curr-02/03/10/12); everything else is fix_mode: flag-only.

Output contract

Inherits the toolkit's unified contract (full schema + body sections + frontmatter keys: <swiftui-plugin-root>/references/_shared/finding-schema.md — do not restate it). Specialized for this domain:

• Findings: swiftui-audits/api-currency/<context>/NN-slug.md (one finding per file, zero-padded, ordered). Per-run index: swiftui-audits/api-currency/_index.md.
• domain: api-currency. Uses the additive field era (free-string release wave, e.g. WWDC22/macOS-13, macOS-26.5, WWDC25/macOS-26). fix_mode is auto for curr-02/03/10/12, else flag-only. availability reads from floors-master.md. source is an Apple URL + access date (fetched via Sosumi) or verify against Xcode 26 SDK. Emit cross_ref per the seam note.

Starter <context> folders (file here when…):

<context>	File a finding here when…
deprecated-renamed/	a real symbol Apple superseded — nav, color, clip, onChange, tab, link, Text+Text (curr-01…07)
concurrency-cargo-cult/	a DispatchQueue.main.async hop in async-aware code (curr-08)
macos-26-5-deprecations/	a freshly-deprecated 26.5 surface — dropDestination, gesture renames, Font weight, accentColor (curr-09…12)
hallucinated-api/	an invented name (curr-13) or a visionOS-only symbol on a Mac target (curr-14)
gating/	a current-but-floored replacement used below the deployment target (route depth → availability-gating)

New-folder rule: if a finding does not fit any existing context folder, create a new one under swiftui-audits/api-currency/ with a lowercase-hyphen slug naming the sub-category, and note it in the run's _index.md. Prefer an existing folder when the fit is reasonable; consistency across runs is a hard requirement. Two runs over the same code produce structurally identical trees.

Reference routing

File	Open when
references/deprecations-and-renames.md	any deprecated/renamed question — the full ❌→✅ catalog, deprecation dates, floors, the gating arm (curr-01…12)
references/hallucinated-currency.md	a name/existence question — the invented-name set + the visionOS-only trap, and the exit-3 corroboration (curr-13/14)
references/source-directory.md	step VERIFY — the Apple/WWDC/practitioner source map fetched via Sosumi
lint/grep-tells.tsv + lint/ast-grep/curr-04-onchange-one-param.yml + lint/ast-grep/curr-06-inline-navlink-in-list.yml	step LOCATE — this skill's declarative lint rule set fed to the shared runner (tier-1 grep tells + tier-2 structural ast-grep: curr-04-onchange-one-param.yml for the 1-param closure shape, curr-06-inline-navlink-in-list.yml for inline NavigationLink containment); edit here to tune detection

Shared toolkit references (point in, never restate):

Shared file	For
<swiftui-plugin-root>/references/_shared/floors-master.md	every floor/availability/deprecation value (the reconciled truth)
<swiftui-plugin-root>/references/_shared/hallucination-blacklist.md	the canonical invented-name list
<swiftui-plugin-root>/references/_shared/macos-arm-gating.md	the macOS-arm gating rule + wrong-arm failure
<swiftui-plugin-root>/references/_shared/finding-schema.md	the unified finding schema + frontmatter keys (incl. additive era)
<swiftui-plugin-root>/references/_shared/fix-safety-protocol.md	the fix-safety protocol (step 7)
<swiftui-plugin-root>/references/_shared/sosumi-reference.md	the Apple-doc spec fetch protocol (step 5 VERIFY)
<swiftui-plugin-root>/references/_shared/swiftui-ctx-reference.md	the practice-corpus CLI contract — lookup/deprecated/file --smart for the consensus shape + permalinked example (steps 5 VERIFY · 7 FIX)
<swiftui-plugin-root>/references/_shared/cross-ref-graph.md	seam ownership + cross_ref targets

Detection accelerator

bash <swiftui-plugin-root>/scripts/swiftui-lint.sh --skill audit-swiftui-api-currency --dir <files-or-dir> [--json out.json] [--sarif out.sarif] — the toolkit's one shared hybrid lint engine, fed this skill's declarative rules: tier-1 grep tells (lint/grep-tells.tsv, curr-01…14 flat-presence / deprecation-string tells) + tier-2 ast-grep structural rules (lint/ast-grep/*.yml — curr-04 1-param onChange closure-shape, curr-06 inline NavigationLink inside a List/ForEach) that grep cannot express. It runs a per-file parse probe (surfaces "did not fully parse" so a structural miss can't look clean), emits unified JSON + SARIF, exits 2 on any hard-fail (curr-13/14) for a CI gate, and degrades to grep-only with a notice if ast-grep is unreachable (npx --package @ast-grep/cli ast-grep; faster: brew install ast-grep). It only LOCATES — always READ each hit in full before reporting (step 3). The thin scripts/currency-lint.sh is a pointer to this runner. Engine

• rule-file format + JSON/SARIF shape + safety rails: <swiftui-plugin-root>/references/_shared/lint-architecture.md.