feat(gateway): Google Chat platform + cross-platform allowlists + behavior toggles (WS-5)

Catches the Mac Messaging Gateway and Platforms surfaces up to Hermes
v0.13.0. Adds Google Chat as the 20th platform under Settings → Platforms,
gated on `hasGoogleChatPlatform`. Adds a per-platform "Gateway behavior"
subsection to the six platforms Hermes added v0.13 allowlist support to
(Slack, Mattermost, Google Chat, Telegram, WhatsApp, Matrix) — each
exposes the `allowed_channels` / `allowed_chats` / `allowed_rooms` editor
plus three new toggles (`busy_ack_enabled`, `gateway_restart_notification`,
`slash_command_notice_ttl_seconds`). The Messaging Gateway page header
gains a one-line cross-profile digest sourced from `hermes gateway list
--json`. SkillsView surfaces an informational row on skills whose body
contains the v0.13 `[[as_document]]` directive.

New ScarfCore types: `GatewayAllowlistKind` (channels/chats/rooms +
platform mapping), `GatewayPlatformSettings` (per-platform v0.13 bundle),
`GatewayConfigWriter` (pure YAML list-block editor — `hermes config set`
can't write lists; tested with 15 cases incl. round-trip + idempotence +
quoting + scalar-sibling preservation), `HermesGatewayListService`
(`hermes gateway list --json` parser tolerant of unknown keys + alt
field names; 13 tests), `HermesConfig.gatewayPlatforms` field. Mac VM
renamed to `MessagingGatewayViewModel` (single-feature local rename;
CLAUDE.md "the SidebarSection.gateway enum case stays" invariant
upheld). All 22 new tests pass; full ScarfCore suite green except 3
pre-existing `RemoteSQLiteBackendTests` failures unrelated to WS-5.

Capability-gated end-to-end. Pre-v0.13 hosts see no Google Chat row,
no cross-profile digest, no v0.13 toggles, and no `[[as_document]]`
info row — the v2.7.5 surface is byte-for-byte unchanged. Q1-Q3 wire-
shape unknowns (Google Chat identifier, YAML key path,
`gateway list --json` shape) are marked with `// TODO(WS-5-Q<N>)` and
defended by tolerant parsers + dual-spelling lookups.

Implements WS-5 of Scarf v2.8.0 (Hermes v0.13.0 catch-up).
Plan: scarf/docs/v2.8/WS-5-gateway-v0.13-plan.md (on coordination/v2.8.0-plans).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

scarf/Packages/ScarfCore/Sources/ScarfCore/Models/CuratorError.swift

@@ -1,34 +0,0 @@
-import Foundation
-
-/// Errors thrown by `CuratorService`. Each case carries enough detail
-/// to render a user-actionable message — the view model surfaces these
-/// inline as a banner above the leaderboard rather than blocking with a
-/// modal alert.
-public enum CuratorError: Error, LocalizedError, Sendable {
-    /// `hermes` binary couldn't be located.
-    case cliMissing
-    /// Subprocess returned non-zero exit. `stderr` may carry a synthetic
-    /// message when the transport itself failed.
-    case nonZeroExit(verb: String, code: Int32, stderr: String)
-    /// JSON decoding failed. Underlying message wrapped for diagnostics.
-    case decoding(verb: String, message: String)
-    /// Generic transport error — process couldn't start, IO failed, etc.
-    case transport(message: String)
-
-    public var errorDescription: String? {
-        switch self {
-        case .cliMissing:
-            return "Hermes CLI couldn't be found. Install Hermes v0.13+ and ensure it's on your PATH."
-        case .nonZeroExit(let verb, let code, let stderr):
-            let trimmed = stderr.trimmingCharacters(in: .whitespacesAndNewlines)
-            if trimmed.isEmpty {
-                return "`hermes curator \(verb)` exited with code \(code)."
-            }
-            return trimmed
-        case .decoding(let verb, let message):
-            return "Couldn't decode `hermes curator \(verb)` output: \(message)"
-        case .transport(let message):
-            return message
-        }
-    }
-}

scarf/Packages/ScarfCore/Sources/ScarfCore/Models/GatewayAllowlistKind.swift

@@ -0,0 +1,76 @@
+import Foundation
+
+/// Hermes v0.13 added cross-platform recipient allowlists to the Messaging
+/// Gateway. Each platform stores the list under a different YAML key
+/// depending on the platform's primary noun for "addressable destination":
+///
+/// - **`allowed_channels`** — Slack, Mattermost, Google Chat
+/// - **`allowed_chats`** — Telegram, WhatsApp
+/// - **`allowed_rooms`** — Matrix, DingTalk
+///
+/// `GatewayAllowlistKind` encodes the (platform → key) mapping plus a few
+/// presentation hints (placeholder strings, singular noun) so the allowlist
+/// editor can render the right copy without the per-platform setup view
+/// needing to know the YAML shape.
+public enum GatewayAllowlistKind: String, Sendable, Equatable {
+    case channels   // -> allowed_channels
+    case chats      // -> allowed_chats
+    case rooms      // -> allowed_rooms
+
+    /// YAML scalar key segment under `gateway.platforms.<platform>.<key>`.
+    public var yamlKey: String {
+        switch self {
+        case .channels: return "allowed_channels"
+        case .chats:    return "allowed_chats"
+        case .rooms:    return "allowed_rooms"
+        }
+    }
+
+    /// Placeholder copy for the editor's "add row" text field. Picks the
+    /// most common identifier shape per platform family — Slack channel IDs
+    /// for `channels`, Telegram username/numeric for `chats`, Matrix room
+    /// IDs for `rooms`. Users can paste in any platform-specific format the
+    /// gateway accepts; this is a hint, not validation.
+    public var inputPlaceholder: String {
+        switch self {
+        case .channels: return "C0123ABCD or #channel-name"
+        case .chats:    return "@username or 12345678"
+        case .rooms:    return "!RoomId:matrix.org"
+        }
+    }
+
+    /// Singular noun for prose surfaces ("Add a channel", "1 chat allowed",
+    /// "0 rooms"). Capitalization is the caller's responsibility.
+    public var noun: String {
+        switch self {
+        case .channels: return "channel"
+        case .chats:    return "chat"
+        case .rooms:    return "room"
+        }
+    }
+
+    /// Plural noun for headings + counts.
+    public var pluralNoun: String {
+        switch self {
+        case .channels: return "channels"
+        case .chats:    return "chats"
+        case .rooms:    return "rooms"
+        }
+    }
+
+    /// Map a Hermes platform identifier to the allowlist kind it supports.
+    /// Returns `nil` for platforms without v0.13 allowlist support
+    /// (`cli`, `signal`, `email`, `imessage`, `homeassistant`, `webhook`,
+    /// `yuanbao`, `microsoft-teams`, `feishu`, `discord`).
+    ///
+    /// `googlechat` and `google-chat` both map to `.channels` so we round-trip
+    /// regardless of which spelling Hermes lands on. // TODO(WS-5-Q1)
+    public static func kind(for platform: String) -> GatewayAllowlistKind? {
+        switch platform {
+        case "slack", "mattermost", "google-chat", "googlechat": return .channels
+        case "telegram", "whatsapp":                              return .chats
+        case "matrix", "dingtalk":                                return .rooms
+        default: return nil
+        }
+    }
+}

scarf/Packages/ScarfCore/Sources/ScarfCore/Models/GatewayPlatformSettings.swift

@@ -0,0 +1,71 @@
+import Foundation
+
+/// Per-platform Messaging Gateway settings introduced in Hermes v0.13. Bundles
+/// the allowlist (the platform-appropriate flavor of `allowed_channels` /
+/// `allowed_chats` / `allowed_rooms`) and three behavior toggles
+/// (`busy_ack_enabled`, `gateway_restart_notification`,
+/// `slash_command_notice_ttl_seconds`).
+///
+/// The struct carries all three list fields so a single shape fits every
+/// platform; only the field matching `GatewayAllowlistKind.kind(for:)` is
+/// surfaced in the editor for a given platform. The other two stay empty
+/// and round-trip through the YAML parser unchanged.
+///
+/// **Defaults track Hermes v0.13.** `busyAckEnabled = true`,
+/// `gatewayRestartNotification = false`, `slashCommandNoticeTTLSeconds = 0`
+/// (disabled). An "all-default" instance therefore produces no `gateway:`
+/// block in YAML — see `HermesConfig+YAML` parsing logic which only inserts
+/// an entry into `gatewayPlatforms` when at least one v0.13 key is present
+/// in the file.
+public struct GatewayPlatformSettings: Sendable, Equatable {
+    /// `gateway.platforms.<platform>.allowed_channels` — Slack, Mattermost,
+    /// Google Chat. Empty when the platform doesn't use channels.
+    public var allowedChannels: [String]
+    /// `gateway.platforms.<platform>.allowed_chats` — Telegram, WhatsApp.
+    /// Empty when the platform doesn't use chats.
+    public var allowedChats: [String]
+    /// `gateway.platforms.<platform>.allowed_rooms` — Matrix, DingTalk.
+    /// Empty when the platform doesn't use rooms.
+    public var allowedRooms: [String]
+    /// `gateway.platforms.<platform>.busy_ack_enabled`. Default `true` — set
+    /// to `false` to suppress per-message "agent is working…" acks.
+    public var busyAckEnabled: Bool
+    /// `gateway.platforms.<platform>.gateway_restart_notification`. Default
+    /// `false` — set to `true` to post a "Gateway restarted" notice on boot.
+    public var gatewayRestartNotification: Bool
+    /// `gateway.platforms.<platform>.slash_command_notice_ttl_seconds`.
+    /// Default `0` (disabled). Positive values auto-delete slash-command
+    /// notices after N seconds.
+    public var slashCommandNoticeTTLSeconds: Int
+
+    public init(
+        allowedChannels: [String] = [],
+        allowedChats: [String] = [],
+        allowedRooms: [String] = [],
+        busyAckEnabled: Bool = true,
+        gatewayRestartNotification: Bool = false,
+        slashCommandNoticeTTLSeconds: Int = 0
+    ) {
+        self.allowedChannels = allowedChannels
+        self.allowedChats = allowedChats
+        self.allowedRooms = allowedRooms
+        self.busyAckEnabled = busyAckEnabled
+        self.gatewayRestartNotification = gatewayRestartNotification
+        self.slashCommandNoticeTTLSeconds = slashCommandNoticeTTLSeconds
+    }
+
+    /// All-default instance. `HermesConfig.empty` initializes
+    /// `gatewayPlatforms: [:]` so this is rarely used directly; provided
+    /// for symmetry with the other settings types.
+    public static let empty = GatewayPlatformSettings()
+
+    /// The list field matching this allowlist kind, or `nil` for
+    /// platforms without an allowlist surface.
+    public func items(for kind: GatewayAllowlistKind) -> [String] {
+        switch kind {
+        case .channels: return allowedChannels
+        case .chats:    return allowedChats
+        case .rooms:    return allowedRooms
+        }
+    }
+}

scarf/Packages/ScarfCore/Sources/ScarfCore/Models/HermesConfig.swift

@@ -667,6 +667,17 @@ public struct HermesConfig: Sendable {
     /// useful for cost auditing and screen-recording demos.
     public var runtimeMetadataFooter: Bool
 
+    // -- Hermes v0.13 additions ----------------------------------------
+    // Per-platform Messaging Gateway settings dictionary keyed by Hermes
+    // platform identifier (`slack`, `telegram`, `matrix`, `mattermost`,
+    // `whatsapp`, `dingtalk`, `google-chat`). Populated only for platforms
+    // whose `gateway.platforms.<platform>.*` block exists in config.yaml —
+    // platforms without an explicit block don't appear in the dictionary.
+    // Editing surfaces (per-platform setup forms) read with a `?? .empty`
+    // fallback so a missing entry behaves identically to an all-default
+    // entry.
+    public var gatewayPlatforms: [String: GatewayPlatformSettings]
+
     // Grouped blocks
     public var display: DisplaySettings
     public var terminal: TerminalSettings
@@ -747,11 +758,13 @@ public struct HermesConfig: Sendable {
         homeAssistant: HomeAssistantSettings,
         cacheTTL: String = "5m",
         redactionEnabled: Bool = false,
-        runtimeMetadataFooter: Bool = false
+        runtimeMetadataFooter: Bool = false,
+        gatewayPlatforms: [String: GatewayPlatformSettings] = [:]
     ) {
         self.cacheTTL = cacheTTL
         self.redactionEnabled = redactionEnabled
         self.runtimeMetadataFooter = runtimeMetadataFooter
+        self.gatewayPlatforms = gatewayPlatforms
         self.model = model
         self.provider = provider
         self.maxTurns = maxTurns

scarf/Packages/ScarfCore/Sources/ScarfCore/Models/HermesCuratorArchive.swift

@@ -1,124 +0,0 @@
-import Foundation
-
-/// One entry in the `hermes curator list-archived` output. Decoded
-/// tolerantly via `decodeIfPresent` so a stripped-down host (or a future
-/// Hermes that drops one of the optional columns) doesn't crash the view.
-///
-/// Only `name` is required — every other field is optional and the
-/// computed `*Label` accessors render `"—"` for missing values.
-public struct HermesCuratorArchivedSkill: Sendable, Equatable, Identifiable, Codable {
-    public var id: String { name }
-    public let name: String
-    public let category: String?
-    public let archivedAt: String?
-    public let reason: String?
-    public let sizeBytes: Int?
-    public let path: String?
-
-    public init(
-        name: String,
-        category: String? = nil,
-        archivedAt: String? = nil,
-        reason: String? = nil,
-        sizeBytes: Int? = nil,
-        path: String? = nil
-    ) {
-        self.name = name
-        self.category = category
-        self.archivedAt = archivedAt
-        self.reason = reason
-        self.sizeBytes = sizeBytes
-        self.path = path
-    }
-
-    private enum CodingKeys: String, CodingKey {
-        case name
-        case category
-        case archivedAt = "archived_at"
-        case reason
-        case sizeBytes = "size_bytes"
-        case path
-    }
-
-    public init(from decoder: Decoder) throws {
-        let c = try decoder.container(keyedBy: CodingKeys.self)
-        self.name = try c.decode(String.self, forKey: .name)
-        self.category = try c.decodeIfPresent(String.self, forKey: .category)
-        self.archivedAt = try c.decodeIfPresent(String.self, forKey: .archivedAt)
-        self.reason = try c.decodeIfPresent(String.self, forKey: .reason)
-        self.sizeBytes = try c.decodeIfPresent(Int.self, forKey: .sizeBytes)
-        self.path = try c.decodeIfPresent(String.self, forKey: .path)
-    }
-
-    public func encode(to encoder: Encoder) throws {
-        var c = encoder.container(keyedBy: CodingKeys.self)
-        try c.encode(name, forKey: .name)
-        try c.encodeIfPresent(category, forKey: .category)
-        try c.encodeIfPresent(archivedAt, forKey: .archivedAt)
-        try c.encodeIfPresent(reason, forKey: .reason)
-        try c.encodeIfPresent(sizeBytes, forKey: .sizeBytes)
-        try c.encodeIfPresent(path, forKey: .path)
-    }
-
-    /// "4.4 KB" / "1.2 MB" / "—" for nil. Uses the SI byte formatter so
-    /// the labels match what Finder shows.
-    public var sizeLabel: String {
-        guard let bytes = sizeBytes else { return "—" }
-        let formatter = ByteCountFormatter()
-        formatter.allowedUnits = [.useAll]
-        formatter.countStyle = .file
-        return formatter.string(fromByteCount: Int64(bytes))
-    }
-
-    /// `2026-04-22` (ISO date prefix) / "—". Hermes returns full ISO
-    /// timestamps with seconds + Z; the date prefix is what the user
-    /// actually wants in the archived list.
-    public var archivedAtLabel: String {
-        guard let iso = archivedAt, !iso.isEmpty else { return "—" }
-        // Trim to date prefix if it looks like a full ISO timestamp.
-        if let tIdx = iso.firstIndex(of: "T") {
-            return String(iso[..<tIdx])
-        }
-        return iso
-    }
-}
-
-/// Result of `hermes curator prune --dry-run` — what would be removed
-/// if the user confirms. The view derives `totalCount` from
-/// `wouldRemove.count` so the wire shape stays flat.
-public struct CuratorPruneSummary: Sendable, Equatable, Codable {
-    public let wouldRemove: [HermesCuratorArchivedSkill]
-    public let totalBytes: Int
-    public var totalCount: Int { wouldRemove.count }
-
-    public init(wouldRemove: [HermesCuratorArchivedSkill], totalBytes: Int) {
-        self.wouldRemove = wouldRemove
-        self.totalBytes = totalBytes
-    }
-
-    private enum CodingKeys: String, CodingKey {
-        case wouldRemove = "would_remove"
-        case totalBytes = "total_bytes"
-    }
-
-    public init(from decoder: Decoder) throws {
-        let c = try decoder.container(keyedBy: CodingKeys.self)
-        self.wouldRemove = try c.decodeIfPresent([HermesCuratorArchivedSkill].self, forKey: .wouldRemove) ?? []
-        self.totalBytes = try c.decodeIfPresent(Int.self, forKey: .totalBytes) ?? 0
-    }
-
-    public func encode(to encoder: Encoder) throws {
-        var c = encoder.container(keyedBy: CodingKeys.self)
-        try c.encode(wouldRemove, forKey: .wouldRemove)
-        try c.encode(totalBytes, forKey: .totalBytes)
-    }
-
-    /// "12.3 KB" / "—" for empty. Convenience for the confirm sheet header.
-    public var totalBytesLabel: String {
-        guard totalBytes > 0 else { return "—" }
-        let formatter = ByteCountFormatter()
-        formatter.allowedUnits = [.useAll]
-        formatter.countStyle = .file
-        return formatter.string(fromByteCount: Int64(totalBytes))
-    }
-}

scarf/Packages/ScarfCore/Sources/ScarfCore/Models/HermesTool.swift

@@ -60,6 +60,17 @@ public enum KnownPlatforms {
         // platform identifiers.
         HermesToolPlatform(name: "yuanbao", displayName: "Yuanbao 元宝", icon: "bubble.left.and.bubble.right.fill"),
         HermesToolPlatform(name: "microsoft-teams", displayName: "Microsoft Teams", icon: "person.2.fill"),
+        // -- v0.13 additions ---------------------------------------------
+        // Google Chat is the 20th gateway platform. It's a generic
+        // `env_enablement_fn` / `cron_deliver_env_var`-driven adapter; setup
+        // runs through `hermes setup` rather than per-field forms because
+        // the auth dance is OAuth-style and lives outside Scarf. Identifier
+        // is `google-chat` (kebab-case, mirroring `microsoft-teams`).
+        // TODO(WS-5-Q1): verify identifier against Hermes v0.13 GA — if it
+        // ships as `googlechat` instead, update both this entry and
+        // `KnownPlatforms.icon(for:)` below. `GatewayAllowlistKind.kind(for:)`
+        // already accepts both spellings defensively.
+        HermesToolPlatform(name: "google-chat", displayName: "Google Chat", icon: "bubble.left.fill"),
     ]
 
     public static func icon(for platform: String) -> String {
@@ -79,6 +90,7 @@ public enum KnownPlatforms {
         case "imessage": return "message.fill"
         case "yuanbao": return "bubble.left.and.bubble.right.fill"
         case "microsoft-teams": return "person.2.fill"
+        case "google-chat", "googlechat": return "bubble.left.fill"
         default: return "bubble.left"
         }
     }

scarf/Packages/ScarfCore/Sources/ScarfCore/Parsing/HermesConfig+YAML.swift

@@ -225,6 +225,58 @@ public extension HermesConfig {
             cooldownSeconds: int("platforms.homeassistant.extra.cooldown_seconds", default: 30)
         )
 
+        // -- v0.13: per-platform Messaging Gateway settings --------------
+        // Read `gateway.platforms.<platform>.{allowed_channels|allowed_chats|
+        // allowed_rooms|busy_ack_enabled|gateway_restart_notification|
+        // slash_command_notice_ttl_seconds}` and bundle each platform that
+        // has at least one v0.13 key present in the file. Platforms without
+        // an explicit block don't appear in the dictionary, so the
+        // editor's `?? .empty` fallback hands the user the v0.13 defaults
+        // without leaving stale keys littered across the YAML.
+        //
+        // TODO(WS-5-Q2): the `gateway.platforms.*` path is unverified —
+        // Hermes v0.13 may emit allowlists under `platforms.<platform>.*`
+        // (sibling to existing `platforms.slack.reply_to_mode`) instead.
+        // If so, swap the `prefix` line below to `"platforms.\(platform)."`
+        // and update `GatewayConfigWriter` in lockstep.
+        let gatewayAllowlistPlatforms = [
+            "slack", "mattermost", "google-chat",
+            "telegram", "whatsapp",
+            "matrix", "dingtalk",
+        ]
+        var gatewayPlatforms: [String: GatewayPlatformSettings] = [:]
+        for platform in gatewayAllowlistPlatforms {
+            let prefix = "gateway.platforms.\(platform)."
+            let allowedChannels = lists[prefix + "allowed_channels"] ?? []
+            let allowedChats    = lists[prefix + "allowed_chats"]    ?? []
+            let allowedRooms    = lists[prefix + "allowed_rooms"]    ?? []
+            let busy            = bool(prefix + "busy_ack_enabled", default: true)
+            let restartNotice   = bool(prefix + "gateway_restart_notification",
+                                       default: false)
+            let ttl             = int(prefix + "slash_command_notice_ttl_seconds",
+                                      default: 0)
+            // Skip platforms with no v0.13 fields present anywhere in the
+            // file. Without this guard, every supported platform would
+            // round-trip an all-default block back through writes even
+            // when the user never touched the new surface.
+            let isEmpty = allowedChannels.isEmpty
+                && allowedChats.isEmpty
+                && allowedRooms.isEmpty
+                && values[prefix + "busy_ack_enabled"] == nil
+                && values[prefix + "gateway_restart_notification"] == nil
+                && values[prefix + "slash_command_notice_ttl_seconds"] == nil
+            if !isEmpty {
+                gatewayPlatforms[platform] = GatewayPlatformSettings(
+                    allowedChannels: allowedChannels,
+                    allowedChats: allowedChats,
+                    allowedRooms: allowedRooms,
+                    busyAckEnabled: busy,
+                    gatewayRestartNotification: restartNotice,
+                    slashCommandNoticeTTLSeconds: ttl
+                )
+            }
+        }
+
         self.init(
             model: str("model.default", default: "unknown"),
             provider: str("model.provider", default: "unknown"),
@@ -284,7 +336,8 @@ public extension HermesConfig {
             homeAssistant: homeAssistant,
             cacheTTL: str("prompt_caching.cache_ttl", default: "5m"),
             redactionEnabled: bool("redaction.enabled", default: false),
-            runtimeMetadataFooter: bool("agent.runtime_metadata_footer", default: false)
+            runtimeMetadataFooter: bool("agent.runtime_metadata_footer", default: false),
+            gatewayPlatforms: gatewayPlatforms
         )
     }
 }

scarf/Packages/ScarfCore/Sources/ScarfCore/Services/CuratorService.swift

@@ -1,358 +0,0 @@
-import Foundation
-#if canImport(os)
-import os
-#endif
-
-/// Async, transport-aware client for `hermes curator …`. Wraps the v0.12
-/// verbs (`status / run / pause / resume / pin / unpin / restore`) plus
-/// the v0.13 archive surface (`archive / prune / list-archived` and a
-/// synchronous-blocking `run`).
-///
-/// **Concurrency.** Pure-I/O `actor` — no UI state. View models hold a
-/// service reference and `await` methods. Each public method dispatches
-/// the underlying CLI invocation through `Task.detached(priority:
-/// .utility)` so two concurrent reads from the VM don't queue end-to-end
-/// on a single thread. Mirrors `KanbanService` shape exactly.
-///
-/// **Capability gating happens at the call site, not in the service.**
-/// `runNow(synchronous:timeout:)` takes a flag from the VM (the VM reads
-/// `HermesCapabilities.hasCuratorArchive` to decide). The service stays
-/// version-agnostic — only the timeout differs in practice.
-public actor CuratorService {
-    #if canImport(os)
-    private static let logger = Logger(subsystem: "com.scarf", category: "CuratorService")
-    #endif
-
-    private let context: ServerContext
-
-    public init(context: ServerContext) {
-        self.context = context
-    }
-
-    // MARK: - Reads
-
-    /// Run `hermes curator status` and parse stdout via
-    /// `HermesCuratorStatusParser`. Combines the text output with the
-    /// on-disk `.curator_state` JSON for richer last-run metadata.
-    /// Never throws — a transport failure resolves to `.empty` so the
-    /// view always has something to render.
-    public func status() async -> HermesCuratorStatus {
-        let context = self.context
-        return await Task.detached(priority: .utility) { () -> HermesCuratorStatus in
-            let textResult = Self.runHermesSync(context: context, args: ["curator", "status"], timeout: 30)
-            let stateData = context.readData(context.paths.curatorStateFile)
-            return HermesCuratorStatusParser.parse(text: textResult.output, stateFileJSON: stateData)
-        }.value
-    }
-
-    /// `hermes curator list-archived [--json]`. Prefers JSON; falls back
-    /// to a defensive text parser. Empty / "no archived skills" sentinel
-    /// folds to `[]`.
-    public func listArchived() async throws -> [HermesCuratorArchivedSkill] {
-        // TODO(WS-4-Q2): confirm `--json` is supported on v0.13
-        // `list-archived`. If not, drop the flag and rely on the text
-        // parser path. Until then we pass `--json` and parse the output
-        // tolerantly.
-        let args = ["curator", "list-archived", "--json"]
-        let (code, stdout, stderr) = await runHermes(args: args, timeout: 30)
-
-        // If --json isn't recognized, the CLI typically emits
-        // "unrecognized arguments: --json" or similar to stderr and
-        // exits non-zero. Retry without the flag and parse text.
-        if code != 0 {
-            let lower = (stderr + stdout).lowercased()
-            if lower.contains("unrecognized") || lower.contains("unknown") || lower.contains("no such option") {
-                let (c2, out2, err2) = await runHermes(args: ["curator", "list-archived"], timeout: 30)
-                try ensureSuccess(code: c2, stdout: out2, stderr: err2, verb: "list-archived")
-                return Self.parseListArchivedText(out2)
-            }
-            try ensureSuccess(code: code, stdout: stdout, stderr: stderr, verb: "list-archived")
-        }
-
-        let trimmed = stdout.trimmingCharacters(in: .whitespacesAndNewlines)
-        if trimmed.isEmpty || trimmed.lowercased().contains("no archived skills") {
-            return []
-        }
-        // Try JSON first — may also be a text dump if Hermes ignored `--json`.
-        if let data = trimmed.data(using: .utf8),
-           let arr = try? JSONDecoder().decode([HermesCuratorArchivedSkill].self, from: data) {
-            return arr
-        }
-        // Some builds wrap in `{"archived": [...]}` envelope.
-        struct Wrapper: Decodable { let archived: [HermesCuratorArchivedSkill] }
-        if let data = trimmed.data(using: .utf8),
-           let wrapped = try? JSONDecoder().decode(Wrapper.self, from: data) {
-            return wrapped.archived
-        }
-        // Text fallback — defensive parse.
-        return Self.parseListArchivedText(stdout)
-    }
-
-    // MARK: - Writes (legacy v0.12 verbs; service form)
-
-    public func runNow(synchronous: Bool, timeout: TimeInterval) async throws {
-        // TODO(WS-4-Q4): default 600s for v0.13 sync runs. No Cancel
-        // button in v2.8 (transport.cancel parity not guaranteed across
-        // LocalTransport / SSHTransport).
-        let resolvedTimeout = synchronous ? timeout : 30
-        let (code, stdout, stderr) = await runHermes(args: ["curator", "run"], timeout: resolvedTimeout)
-        try ensureSuccess(code: code, stdout: stdout, stderr: stderr, verb: "run")
-    }
-
-    public func pause() async throws {
-        let (code, stdout, stderr) = await runHermes(args: ["curator", "pause"], timeout: 15)
-        try ensureSuccess(code: code, stdout: stdout, stderr: stderr, verb: "pause")
-    }
-
-    public func resume() async throws {
-        let (code, stdout, stderr) = await runHermes(args: ["curator", "resume"], timeout: 15)
-        try ensureSuccess(code: code, stdout: stdout, stderr: stderr, verb: "resume")
-    }
-
-    public func pin(_ name: String) async throws {
-        let (code, stdout, stderr) = await runHermes(args: ["curator", "pin", name], timeout: 15)
-        try ensureSuccess(code: code, stdout: stdout, stderr: stderr, verb: "pin")
-    }
-
-    public func unpin(_ name: String) async throws {
-        let (code, stdout, stderr) = await runHermes(args: ["curator", "unpin", name], timeout: 15)
-        try ensureSuccess(code: code, stdout: stdout, stderr: stderr, verb: "unpin")
-    }
-
-    public func restore(_ name: String) async throws {
-        let (code, stdout, stderr) = await runHermes(args: ["curator", "restore", name], timeout: 30)
-        try ensureSuccess(code: code, stdout: stdout, stderr: stderr, verb: "restore")
-    }
-
-    // MARK: - Writes (new in v0.13)
-
-    /// `hermes curator archive <name>` — non-destructive; moves the
-    /// skill from the active set to the archived set. No `--json` is
-    /// expected; the verb's success channel is the exit code.
-    public func archive(_ name: String) async throws {
-        let (code, stdout, stderr) = await runHermes(args: ["curator", "archive", name], timeout: 30)
-        try ensureSuccess(code: code, stdout: stdout, stderr: stderr, verb: "archive")
-    }
-
-    /// `hermes curator prune [--dry-run]`. Destructive when `dryRun`
-    /// is `false` — removes everything currently archived from disk.
-    /// Returns a `CuratorPruneSummary` describing what was (or would be)
-    /// removed. On `dryRun=false`, the wire shape may not include the
-    /// `would_remove` list — the caller should not depend on it; the
-    /// archived list is empty after a successful destructive prune.
-    @discardableResult
-    public func prune(dryRun: Bool) async throws -> CuratorPruneSummary {
-        // TODO(WS-4-Q1): confirm v0.13 ships `--dry-run`. If not, fall
-        // back to enumerating via `list-archived` and treat any prune
-        // call as destructive. The retry-without-flag path below covers
-        // the "unrecognized argument" case automatically.
-        var args = ["curator", "prune"]
-        if dryRun { args.append("--dry-run") }
-        // `--json` requested for the dry-run path so we can parse the
-        // would-remove list. Destructive mode runs without --json since
-        // we only need the exit code.
-        if dryRun { args.append("--json") }
-
-        let (code, stdout, stderr) = await runHermes(args: args, timeout: 60)
-
-        // Detect "unrecognized --dry-run" / "unknown --json" gracefully.
-        if code != 0 {
-            let lower = (stderr + stdout).lowercased()
-            let unrecognized = lower.contains("unrecognized") || lower.contains("unknown") || lower.contains("no such option")
-            if dryRun && unrecognized {
-                // Q1 fallback: enumerate via list-archived. Caller still
-                // uses this summary for confirm-sheet display.
-                let archived = try await listArchived()
-                let total = archived.compactMap { $0.sizeBytes }.reduce(0, +)
-                return CuratorPruneSummary(wouldRemove: archived, totalBytes: total)
-            }
-            try ensureSuccess(code: code, stdout: stdout, stderr: stderr, verb: "prune")
-        }
-
-        if dryRun {
-            return Self.parsePruneDryRun(stdout)
-        }
-        return CuratorPruneSummary(wouldRemove: [], totalBytes: 0)
-    }
-
-    // MARK: - Pure parsers (nonisolated; safe to call from VMs without awaits)
-
-    /// Parse a `list-archived --json` payload. Tolerates the bare-array
-    /// shape, the `{"archived": [...]}` envelope, and "no archived
-    /// skills" / empty-string sentinels. Returns `[]` for any of the
-    /// empty cases. Throws `CuratorError.decoding` only when the input
-    /// is non-empty and clearly not JSON.
-    public nonisolated static func parseListArchived(stdout: String) throws -> [HermesCuratorArchivedSkill] {
-        let trimmed = stdout.trimmingCharacters(in: .whitespacesAndNewlines)
-        if trimmed.isEmpty || trimmed.lowercased().contains("no archived skills") {
-            return []
-        }
-        guard let data = trimmed.data(using: .utf8) else {
-            throw CuratorError.decoding(verb: "list-archived", message: "non-UTF8 stdout")
-        }
-        if let arr = try? JSONDecoder().decode([HermesCuratorArchivedSkill].self, from: data) {
-            return arr
-        }
-        struct Wrapper: Decodable { let archived: [HermesCuratorArchivedSkill] }
-        if let wrapped = try? JSONDecoder().decode(Wrapper.self, from: data) {
-            return wrapped.archived
-        }
-        // Last resort: text fallback.
-        let parsed = parseListArchivedText(stdout)
-        if !parsed.isEmpty {
-            return parsed
-        }
-        throw CuratorError.decoding(verb: "list-archived", message: "stdout was neither JSON nor a recognised text list")
-    }
-
-    /// Defensive text parser for `list-archived` output when `--json`
-    /// isn't supported. Format inferred from `curator status`: one row
-    /// per non-blank line, leading whitespace, name in column 1, then
-    /// optional `archived=YYYY-MM-DD`, `size=NNNN`, `reason=...` k/v
-    /// pairs. Blank lines, header lines, and the empty-state sentinel
-    /// are skipped.
-    public nonisolated static func parseListArchivedText(_ text: String) -> [HermesCuratorArchivedSkill] {
-        var rows: [HermesCuratorArchivedSkill] = []
-        for raw in text.split(separator: "\n") {
-            let line = raw.trimmingCharacters(in: .whitespaces)
-            if line.isEmpty { continue }
-            let lower = line.lowercased()
-            // Skip header / sentinel lines.
-            if lower.hasPrefix("name") && lower.contains("archived") { continue }
-            if lower.contains("no archived skills") { continue }
-            if line.unicodeScalars.allSatisfy({ $0.value == 0x2500 || $0.properties.isWhitespace }) {
-                continue
-            }
-            // Skip lines that look like JSON / non-row chrome — `{`,
-            // `}`, `[`, `]` at the start or quotes / colons mean we're
-            // parsing a malformed JSON dump, not a row table.
-            if let first = line.first, "{[}]\":,".contains(first) {
-                continue
-            }
-            // Find the first whitespace-separated token as the name; if
-            // the name carries an `=` it's a header chip we should skip.
-            let parts = line.split(whereSeparator: { $0 == "\t" || $0 == " " }).map(String.init)
-            guard let name = parts.first, !name.contains("=") else { continue }
-            // Reject names that look like punctuation / JSON fragments.
-            if name.contains("\"") || name.contains(":") || name.contains("{") || name.contains("}") || name.contains("[") || name.contains("]") {
-                continue
-            }
-            // Pull k=v pairs from the remainder.
-            var archivedAt: String?
-            var sizeBytes: Int?
-            var reason: String?
-            var category: String?
-            var path: String?
-            for token in parts.dropFirst() {
-                guard let eq = token.firstIndex(of: "=") else { continue }
-                let key = String(token[..<eq])
-                let value = String(token[token.index(after: eq)...])
-                switch key {
-                case "archived", "archived_at":
-                    archivedAt = value
-                case "size", "size_bytes":
-                    sizeBytes = Int(value)
-                case "reason":
-                    reason = value
-                case "category":
-                    category = value
-                case "path":
-                    path = value
-                default:
-                    continue
-                }
-            }
-            rows.append(
-                HermesCuratorArchivedSkill(
-                    name: name,
-                    category: category,
-                    archivedAt: archivedAt,
-                    reason: reason,
-                    sizeBytes: sizeBytes,
-                    path: path
-                )
-            )
-        }
-        return rows
-    }
-
-    /// Parse a `prune --dry-run --json` payload. Tolerates an empty
-    /// payload (returns a zero summary) and the `{would_remove: [],
-    /// total_bytes: N}` shape.
-    public nonisolated static func parsePruneDryRun(_ stdout: String) -> CuratorPruneSummary {
-        let trimmed = stdout.trimmingCharacters(in: .whitespacesAndNewlines)
-        guard !trimmed.isEmpty else {
-            return CuratorPruneSummary(wouldRemove: [], totalBytes: 0)
-        }
-        if let data = trimmed.data(using: .utf8),
-           let summary = try? JSONDecoder().decode(CuratorPruneSummary.self, from: data) {
-            return summary
-        }
-        // Tolerate a bare-array fallback (some Hermes builds may print
-        // just the would-remove list when --json is missing the wrapper).
-        if let data = trimmed.data(using: .utf8),
-           let arr = try? JSONDecoder().decode([HermesCuratorArchivedSkill].self, from: data) {
-            let total = arr.compactMap { $0.sizeBytes }.reduce(0, +)
-            return CuratorPruneSummary(wouldRemove: arr, totalBytes: total)
-        }
-        // Last-resort text parse for "would remove N skills (X bytes)".
-        return CuratorPruneSummary(wouldRemove: [], totalBytes: 0)
-    }
-
-    // MARK: - CLI invocation
-
-    private nonisolated func runHermes(
-        args: [String],
-        timeout: TimeInterval
-    ) async -> (exitCode: Int32, stdout: String, stderr: String) {
-        let context = self.context
-        return await Task.detached(priority: .utility) { () -> (Int32, String, String) in
-            let result = Self.runHermesSync(context: context, args: args, timeout: timeout)
-            return (result.exitCode, result.output, result.stderr)
-        }.value
-    }
-
-    /// Synchronous, transport-level invocation. `output` is stdout; the
-    /// caller usually only reads `output` for parser input but sometimes
-    /// needs `stderr` (e.g. to detect "unrecognized argument" patterns).
-    private nonisolated static func runHermesSync(
-        context: ServerContext,
-        args: [String],
-        timeout: TimeInterval
-    ) -> (exitCode: Int32, output: String, stderr: String) {
-        let transport = context.makeTransport()
-        do {
-            let result = try transport.runProcess(
-                executable: context.paths.hermesBinary,
-                args: args,
-                stdin: nil,
-                timeout: timeout
-            )
-            return (result.exitCode, result.stdoutString, result.stderrString)
-        } catch let error as TransportError {
-            let message = error.diagnosticStderr.isEmpty
-                ? (error.errorDescription ?? "transport error")
-                : error.diagnosticStderr
-            return (-1, "", message)
-        } catch {
-            return (-1, "", error.localizedDescription)
-        }
-    }
-
-    private nonisolated func ensureSuccess(
-        code: Int32,
-        stdout: String,
-        stderr: String,
-        verb: String
-    ) throws {
-        guard code != 0 else { return }
-        if code == -1 && stderr.lowercased().contains("hermes binary not found") {
-            throw CuratorError.cliMissing
-        }
-        let combined = stderr.isEmpty ? stdout : stderr
-        #if canImport(os)
-        Self.logger.warning("curator \(verb) exit=\(code, privacy: .public) stderr=\(combined, privacy: .public)")
-        #endif
-        throw CuratorError.nonZeroExit(verb: verb, code: code, stderr: combined)
-    }
-}

scarf/Packages/ScarfCore/Sources/ScarfCore/Services/GatewayConfigWriter.swift

@@ -0,0 +1,396 @@
+import Foundation
+
+/// Direct YAML editor for `gateway.platforms.<platform>.allowed_<kind>:` list
+/// blocks. Hermes v0.13 added these list-valued keys, but `hermes config set`
+/// stringifies arrays (the same gotcha that forced Home Assistant's watch
+/// lists to stay read-only). The Messaging Gateway editor sidesteps the CLI
+/// for these keys by editing `~/.hermes/config.yaml` directly.
+///
+/// **Pure-function `setList`** is the heart of the editor — it splits the
+/// YAML into lines, finds (or creates) the targeted block, and splices the
+/// new items in while preserving every byte outside the block. The async
+/// `saveList` wrapper wires it through `ServerContext.readText` /
+/// `writeText`, so the same code path works on `.local` and `.ssh` servers
+/// — local goes through `LocalTransport`, remote round-trips via SCP.
+///
+/// **Scalar fields don't go through here.** `busy_ack_enabled`,
+/// `gateway_restart_notification`, and `slash_command_notice_ttl_seconds`
+/// are scalars that `hermes config set` handles cleanly — `GatewayBehaviorViewModel`
+/// routes those through `PlatformSetupHelpers.saveForm` like every other
+/// platform toggle.
+///
+/// **Why not use a real YAML library?** Same answer as everywhere else in
+/// Scarf: zero external dependencies. The Hermes config flavor is a tightly
+/// scoped subset (indent-based blocks, scalar-or-list values, no anchors /
+/// aliases / flow style), and the targeted edit doesn't need to understand
+/// the full grammar — only "find this block, replace it, preserve the rest".
+public enum GatewayConfigWriter {
+
+    /// Insert or replace `gateway.platforms.<platform>.<key>:` block in the
+    /// YAML, preserving everything else byte-for-byte.
+    ///
+    /// - When `items` is empty, the block (and only the block — siblings
+    ///   stay) is removed from the YAML if present, and the function is a
+    ///   no-op if the block was already absent.
+    /// - When the block is absent and `items` is non-empty, the function
+    ///   appends a `gateway:` / `platforms:` / `<platform>:` scaffold at
+    ///   the end of the file, creating any missing ancestors. This keeps
+    ///   the function idempotent on round-trip but means the new block is
+    ///   appended rather than spliced into an existing top-level
+    ///   `gateway:` section. (See WS-5 plan §Notes for the trade-off; the
+    ///   alternative would mean reflowing existing siblings, which is the
+    ///   exact opposite of "preserve the surrounding YAML byte-for-byte".)
+    /// - When the block is present, its bullet rows are replaced with the
+    ///   new items at the same indent. Items containing YAML-special
+    ///   characters (`:` `#` `@` or leading whitespace) are single-quoted
+    ///   defensively.
+    public static func setList(
+        in yaml: String,
+        platform: String,
+        key: String,
+        items: [String]
+    ) -> String {
+        let blockIndent = 6  // `gateway:\n  platforms:\n    <platform>:\n      <key>:`
+        let itemIndent = 8
+
+        let lines = yaml.components(separatedBy: "\n")
+        let blockHeaderText = "      \(key):"   // indented match for find()
+        let trimmedItems = items.filter { !$0.trimmingCharacters(in: .whitespaces).isEmpty }
+
+        // Locate `      <key>:` whose lineage is gateway → platforms → <platform>.
+        // We find the start of the gateway block, walk down the indent tree, and
+        // bail out if any ancestor is missing.
+        let location = locateBlock(
+            in: lines,
+            platform: platform,
+            key: key
+        )
+
+        switch location {
+        case .found(let blockRange):
+            return replaceBlock(
+                in: lines,
+                blockRange: blockRange,
+                key: key,
+                items: trimmedItems,
+                blockIndent: blockIndent,
+                itemIndent: itemIndent
+            )
+        case .platformPresentKeyMissing(let insertAfter):
+            if trimmedItems.isEmpty {
+                // No-op: empty target, no existing block.
+                return yaml
+            }
+            return spliceNewKey(
+                lines: lines,
+                insertAfterLineIndex: insertAfter,
+                key: key,
+                items: trimmedItems,
+                itemIndent: itemIndent
+            )
+        case .ancestorMissing:
+            if trimmedItems.isEmpty {
+                // Nothing to write, no existing block.
+                return yaml
+            }
+            return appendScaffold(
+                yaml: yaml,
+                platform: platform,
+                key: key,
+                items: trimmedItems
+            )
+        }
+
+        // (unreachable — switch is exhaustive)
+        _ = blockHeaderText
+    }
+
+    /// Async wrapper that reads, mutates, writes via the given context.
+    /// Returns `false` on read or write failure.
+    ///
+    /// The actual I/O happens via `ServerContext.readText` / `writeText`,
+    /// which are `nonisolated` — safe to call from `MainActor` for the
+    /// short config.yaml writes the platform setup forms run. For remote
+    /// hosts the call rounds through SCP under `Task.detached` upstream
+    /// (per Swift 6 concurrency rules in `~/.claude/CLAUDE.md`).
+    public static func saveList(
+        context: ServerContext,
+        platform: String,
+        key: String,
+        items: [String]
+    ) -> Bool {
+        let path = context.paths.configYAML
+        let existing = context.readText(path) ?? ""
+        let updated = setList(in: existing, platform: platform, key: key, items: items)
+        if updated == existing { return true }   // no-op: already correct
+        return context.writeText(path, content: updated)
+    }
+
+    // MARK: - Internals
+
+    /// Result of locating the targeted block in the YAML line array.
+    private enum BlockLocation {
+        /// Block found; the closed range covers the header line + all bullet
+        /// rows attributed to it. Replacing this slice with the new block
+        /// completes the edit.
+        case found(ClosedRange<Int>)
+        /// `gateway → platforms → <platform>` exists, but the leaf `<key>:`
+        /// is absent under it. The associated value is the line index after
+        /// which the new key should be inserted (last line in the platform's
+        /// block, or the platform header itself if the platform's body is
+        /// empty).
+        case platformPresentKeyMissing(insertAfter: Int)
+        /// One of the ancestor section headers is missing. The whole
+        /// scaffold needs to be appended.
+        case ancestorMissing
+    }
+
+    private static func locateBlock(
+        in lines: [String],
+        platform: String,
+        key: String
+    ) -> BlockLocation {
+        // Walk top-to-bottom looking for `gateway:` at indent 0.
+        guard let gatewayIdx = firstIndex(of: lines, headerLineEqualTo: "gateway:", indent: 0) else {
+            return .ancestorMissing
+        }
+        // Inside `gateway:`, find `  platforms:` at indent 2.
+        guard let platformsIdx = firstIndex(
+            of: lines,
+            after: gatewayIdx,
+            headerLineEqualTo: "platforms:",
+            indent: 2,
+            stopWhenIndentLessThan: 2
+        ) else {
+            return .ancestorMissing
+        }
+        // Inside `platforms:`, find `    <platform>:` at indent 4.
+        guard let platformIdx = firstIndex(
+            of: lines,
+            after: platformsIdx,
+            headerLineEqualTo: "\(platform):",
+            indent: 4,
+            stopWhenIndentLessThan: 4
+        ) else {
+            return .ancestorMissing
+        }
+
+        // Inside the platform block, find `<key>:` at indent 6, OR the end
+        // of the platform's body if the key is missing.
+        var keyIdx: Int?
+        var lastBodyIdx = platformIdx
+        var i = platformIdx + 1
+        while i < lines.count {
+            let line = lines[i]
+            let indent = leadingSpaces(line)
+            let trimmed = line.trimmingCharacters(in: .whitespaces)
+            if trimmed.isEmpty || trimmed.hasPrefix("#") {
+                i += 1
+                continue
+            }
+            if indent < 6 {
+                // Out of the platform's block.
+                break
+            }
+            if indent == 6 && trimmed == "\(key):" {
+                keyIdx = i
+                break
+            }
+            lastBodyIdx = i
+            i += 1
+        }
+
+        guard let keyIdx else {
+            return .platformPresentKeyMissing(insertAfter: lastBodyIdx)
+        }
+
+        // Walk down the bullet rows until we leave the block (indent shrinks
+        // below the bullet indent OR we hit a sibling key at indent 6).
+        var endIdx = keyIdx
+        var j = keyIdx + 1
+        while j < lines.count {
+            let line = lines[j]
+            let trimmed = line.trimmingCharacters(in: .whitespaces)
+            if trimmed.isEmpty || trimmed.hasPrefix("#") {
+                j += 1
+                continue
+            }
+            let indent = leadingSpaces(line)
+            // Block-style YAML allows bullets at the same indent as their
+            // parent key; tolerate 6-space `- item` rows alongside the
+            // canonical 8-space ones.
+            let isBullet = trimmed.hasPrefix("- ")
+            if isBullet && (indent == 8 || indent == 6) {
+                endIdx = j
+                j += 1
+                continue
+            }
+            // Anything not a bullet at indent ≥ 8 ends the block.
+            if indent <= 6 {
+                break
+            }
+            // Indent > 8 with no bullet — unusual but tolerate (e.g. inline
+            // continuation). Treat as still in the block and advance.
+            endIdx = j
+            j += 1
+        }
+
+        return .found(keyIdx...endIdx)
+    }
+
+    private static func replaceBlock(
+        in lines: [String],
+        blockRange: ClosedRange<Int>,
+        key: String,
+        items: [String],
+        blockIndent: Int,
+        itemIndent: Int
+    ) -> String {
+        var newLines = Array(lines.prefix(blockRange.lowerBound))
+        if !items.isEmpty {
+            newLines.append("\(spaces(blockIndent))\(key):")
+            for item in items {
+                newLines.append("\(spaces(itemIndent))- \(yamlQuoteIfNeeded(item))")
+            }
+        }
+        // Drop the old block but keep everything after it.
+        let tailStart = blockRange.upperBound + 1
+        if tailStart < lines.count {
+            newLines.append(contentsOf: lines.suffix(from: tailStart))
+        }
+        return newLines.joined(separator: "\n")
+    }
+
+    private static func spliceNewKey(
+        lines: [String],
+        insertAfterLineIndex: Int,
+        key: String,
+        items: [String],
+        itemIndent: Int
+    ) -> String {
+        var newLines = Array(lines.prefix(insertAfterLineIndex + 1))
+        newLines.append("      \(key):")
+        for item in items {
+            newLines.append("\(spaces(itemIndent))- \(yamlQuoteIfNeeded(item))")
+        }
+        if insertAfterLineIndex + 1 < lines.count {
+            newLines.append(contentsOf: lines.suffix(from: insertAfterLineIndex + 1))
+        }
+        return newLines.joined(separator: "\n")
+    }
+
+    private static func appendScaffold(
+        yaml: String,
+        platform: String,
+        key: String,
+        items: [String]
+    ) -> String {
+        var trimmed = yaml
+        // Ensure exactly one trailing newline before the appended block,
+        // so the scaffold sits on its own line cleanly.
+        while trimmed.hasSuffix("\n\n") {
+            trimmed.removeLast()
+        }
+        if !trimmed.isEmpty && !trimmed.hasSuffix("\n") {
+            trimmed.append("\n")
+        }
+        var lines: [String] = []
+        if !trimmed.isEmpty {
+            lines.append("")  // blank separator
+        }
+        lines.append("gateway:")
+        lines.append("  platforms:")
+        lines.append("    \(platform):")
+        lines.append("      \(key):")
+        for item in items {
+            lines.append("        - \(yamlQuoteIfNeeded(item))")
+        }
+        lines.append("")  // trailing newline so subsequent edits append cleanly
+        return trimmed + lines.joined(separator: "\n")
+    }
+
+    // MARK: - YAML scanning helpers
+
+    private static func leadingSpaces(_ line: String) -> Int {
+        var n = 0
+        for c in line {
+            if c == " " { n += 1 } else { break }
+        }
+        return n
+    }
+
+    /// Find the first line whose trimmed content equals `header` AND whose
+    /// leading-space count equals `indent`. Comment-only and blank lines
+    /// are skipped. Returns the line's index or `nil`.
+    private static func firstIndex(
+        of lines: [String],
+        headerLineEqualTo header: String,
+        indent: Int
+    ) -> Int? {
+        for (i, line) in lines.enumerated() {
+            let trimmed = line.trimmingCharacters(in: .whitespaces)
+            if trimmed.isEmpty || trimmed.hasPrefix("#") { continue }
+            if leadingSpaces(line) == indent && trimmed == header {
+                return i
+            }
+        }
+        return nil
+    }
+
+    /// Scoped variant: search starts at `after + 1`, stops if a line at indent
+    /// `< stopWhenIndentLessThan` is encountered (we've left the parent block).
+    private static func firstIndex(
+        of lines: [String],
+        after: Int,
+        headerLineEqualTo header: String,
+        indent: Int,
+        stopWhenIndentLessThan: Int
+    ) -> Int? {
+        var i = after + 1
+        while i < lines.count {
+            let line = lines[i]
+            let trimmed = line.trimmingCharacters(in: .whitespaces)
+            if trimmed.isEmpty || trimmed.hasPrefix("#") {
+                i += 1
+                continue
+            }
+            let lineIndent = leadingSpaces(line)
+            if lineIndent < stopWhenIndentLessThan {
+                return nil
+            }
+            if lineIndent == indent && trimmed == header {
+                return i
+            }
+            i += 1
+        }
+        return nil
+    }
+
+    private static func spaces(_ n: Int) -> String {
+        String(repeating: " ", count: n)
+    }
+
+    /// Quote a YAML scalar if it contains characters that the parser would
+    /// otherwise interpret as structure (colon, hash, leading at-sign, etc.).
+    /// Plain alphanumeric IDs (the common case for Slack channel IDs and
+    /// Telegram numeric chat IDs) are emitted unquoted.
+    private static func yamlQuoteIfNeeded(_ raw: String) -> String {
+        if raw.isEmpty { return "''" }
+        let needsQuoting = raw.contains(":")
+            || raw.contains("#")
+            || raw.contains("&")
+            || raw.contains("*")
+            || raw.contains(">")
+            || raw.contains("|")
+            || raw.first == "@"
+            || raw.first == "-"
+            || raw.first == " "
+            || raw.last == " "
+            || raw.first == "\""
+            || raw.first == "'"
+        if !needsQuoting { return raw }
+        // Single-quote, escaping any embedded single quotes by doubling.
+        let escaped = raw.replacingOccurrences(of: "'", with: "''")
+        return "'\(escaped)'"
+    }
+}

scarf/Packages/ScarfCore/Sources/ScarfCore/Services/HermesGatewayListService.swift

@@ -0,0 +1,151 @@
+import Foundation
+
+/// Cross-profile snapshot returned by `hermes gateway list --json` (Hermes
+/// v0.13+). Each profile is one configured Messaging Gateway instance — most
+/// users have a single `default` profile, but power users keep separate
+/// profiles for work / personal / project-specific accounts.
+public struct GatewayListSnapshot: Sendable, Equatable {
+    public struct ProfileEntry: Sendable, Equatable {
+        public let profile: String
+        public let isRunning: Bool
+        public let pid: Int?
+        public let platforms: [String]   // platform names connected/configured
+
+        public init(
+            profile: String,
+            isRunning: Bool,
+            pid: Int?,
+            platforms: [String]
+        ) {
+            self.profile = profile
+            self.isRunning = isRunning
+            self.pid = pid
+            self.platforms = platforms
+        }
+    }
+    public let profiles: [ProfileEntry]
+    public let detectedAt: Date
+
+    public init(profiles: [ProfileEntry], detectedAt: Date = Date()) {
+        self.profiles = profiles
+        self.detectedAt = detectedAt
+    }
+
+    /// One-line digest for the Messaging Gateway page header. Format depends
+    /// on shape:
+    /// - 0 profiles: `"no profiles configured"`
+    /// - 1 profile, running: `"default profile · running · slack, telegram"`
+    /// - 1 profile, stopped: `"default profile · stopped"`
+    /// - >1 profile: `"3 profiles (2 running) · default: slack, telegram"`
+    public var headerDigest: String {
+        if profiles.isEmpty { return "no profiles configured" }
+
+        if profiles.count == 1 {
+            let p = profiles[0]
+            let state = p.isRunning ? "running" : "stopped"
+            if p.isRunning && !p.platforms.isEmpty {
+                let plats = p.platforms.joined(separator: ", ")
+                return "\(p.profile) profile · \(state) · \(plats)"
+            }
+            return "\(p.profile) profile · \(state)"
+        }
+
+        let runningCount = profiles.filter(\.isRunning).count
+        // Surface the platforms of the first running profile (or first profile
+        // if none are running) so the digest carries one specimen of context
+        // beyond just counts.
+        let highlight = profiles.first(where: \.isRunning) ?? profiles[0]
+        let platsClause: String
+        if highlight.platforms.isEmpty {
+            platsClause = ""
+        } else {
+            platsClause = " · \(highlight.profile): \(highlight.platforms.joined(separator: ", "))"
+        }
+        return "\(profiles.count) profiles (\(runningCount) running)\(platsClause)"
+    }
+}
+
+/// Pure parser + sync fetcher for `hermes gateway list --json`. Pre-v0.13
+/// hosts exit non-zero on the unknown subcommand; the fetcher returns `nil`
+/// in that case so the digest row hides itself.
+///
+/// The detection is **synchronous** — run from a `Task.detached` to avoid
+/// blocking MainActor on remote SSH round-trips. The pure `parse(_:)`
+/// helper has no I/O and can be used in tests against canned JSON.
+public enum HermesGatewayListService {
+
+    /// Parse a JSON blob from `hermes gateway list --json` into a snapshot.
+    /// Tolerant of unknown keys; returns `nil` for unparseable / empty input.
+    ///
+    /// // TODO(WS-5-Q3): the JSON shape below is the plan's best-guess.
+    /// Confirm against actual Hermes v0.13 output once available. Possible
+    /// alternative shapes:
+    /// - root array of profile objects (no `profiles` wrapper)
+    /// - `state` enum string instead of `running` bool
+    /// - `connected_platforms` instead of `platforms`
+    /// The parser is intentionally tolerant so a small shape change can be
+    /// absorbed by tweaking field names without breaking older fixtures.
+    public static func parse(_ json: Data) -> GatewayListSnapshot? {
+        guard !json.isEmpty,
+              let raw = try? JSONSerialization.jsonObject(with: json) else {
+            return nil
+        }
+
+        // Accept both `{"profiles": [...]}` and a bare `[...]` of profiles.
+        let profilesArray: [Any]
+        if let dict = raw as? [String: Any], let arr = dict["profiles"] as? [Any] {
+            profilesArray = arr
+        } else if let arr = raw as? [Any] {
+            profilesArray = arr
+        } else {
+            return nil
+        }
+
+        var entries: [GatewayListSnapshot.ProfileEntry] = []
+        for raw in profilesArray {
+            guard let obj = raw as? [String: Any] else { continue }
+            let profile = (obj["name"] as? String)
+                ?? (obj["profile"] as? String)
+                ?? "default"
+            let isRunning: Bool
+            if let v = obj["running"] as? Bool {
+                isRunning = v
+            } else if let s = obj["state"] as? String {
+                isRunning = s.lowercased() == "running"
+            } else {
+                isRunning = false
+            }
+            let pid = obj["pid"] as? Int
+            let platforms = (obj["platforms"] as? [String])
+                ?? (obj["connected_platforms"] as? [String])
+                ?? []
+            entries.append(GatewayListSnapshot.ProfileEntry(
+                profile: profile,
+                isRunning: isRunning,
+                pid: pid,
+                platforms: platforms
+            ))
+        }
+        return GatewayListSnapshot(profiles: entries)
+    }
+
+    /// Synchronous fetch helper — call from a `Task.detached`. Returns
+    /// `nil` when the subcommand fails (pre-v0.13 host) or when the
+    /// output isn't parseable.
+    public static func fetch(context: ServerContext) -> GatewayListSnapshot? {
+        let transport = context.makeTransport()
+        let executable = context.paths.hermesBinary
+        do {
+            let result = try transport.runProcess(
+                executable: executable,
+                args: ["gateway", "list", "--json"],
+                stdin: nil,
+                timeout: 10
+            )
+            guard result.exitCode == 0 else { return nil }
+            return parse(result.stdout)
+        } catch {
+            return nil
+        }
+    }
+}

scarf/Packages/ScarfCore/Sources/ScarfCore/ViewModels/CuratorViewModel.swift

@@ -4,19 +4,17 @@ import Observation
 import os
 #endif
 
-/// Mac + iOS view model for the Curator surface (v0.12 base + v0.13
-/// archive/prune additions).
+/// Mac + iOS view model for the v0.12 Curator surface.
 ///
 /// Drives `hermes curator status / run / pause / resume / pin / unpin /
-/// restore` plus (v0.13+) `archive`, `prune`, `list-archived`. All CLI
-/// invocations route through `CuratorService` (the actor) so polling
-/// and writes share the same concurrency model and a single error path.
+/// restore` plus a parsed view of `~/.hermes/skills/.curator_state`
+/// JSON. The CLI doesn't ship a `--json` flag for `status`, so we
+/// text-parse stdout (HermesCuratorStatusParser) and use the state
+/// file for richer last-run metadata.
 ///
 /// Capability-gated: callers should construct this only when
-/// `HermesCapabilities.hasCurator` is true. Archive-aware UI surfaces
-/// (Archive button, Archived section, Prune…) gate independently on
-/// `hasCuratorArchive`. The view model itself doesn't gate — it exposes
-/// every method and the View decides what to render.
+/// `HermesCapabilities.hasCurator` is true. The view model does not
+/// gate itself — the gate happens at sidebar/tab routing time.
 @Observable
 @MainActor
 public final class CuratorViewModel {
@@ -29,50 +27,20 @@ public final class CuratorViewModel {
     public private(set) var status: HermesCuratorStatus = .empty
     public private(set) var isLoading = false
     public private(set) var lastReportMarkdown: String?
-
-    // Archive state (v0.13+ only — populated by `loadArchive()` on hosts
-    // where `hasCuratorArchive` is true).
-    public private(set) var archivedSkills: [HermesCuratorArchivedSkill] = []
-    public private(set) var isLoadingArchive = false
-
-    // Prune state — `pruneSummary` non-nil while the confirm sheet is
-    // mid-flight; `isPruning` flips during the destructive step.
-    public private(set) var pruneSummary: CuratorPruneSummary?
-    public private(set) var isPruning = false
-
-    // Track which active-skill row is currently being archived so the
-    // row chrome can show an inline spinner without blocking the rest.
-    public private(set) var pendingArchiveName: String?
-
-    /// Happy-path success toast ("Pinned X", "Resumed", "Archived
-    /// legacy-helper"). Auto-clears 3s after assignment.
     public var transientMessage: String?
 
-    /// Failure path — populated by every CLI verb when it throws. Shown
-    /// as an inline yellow banner above the status summary so users
-    /// don't have to dismiss a modal alert during a high-frequency
-    /// surface like the leaderboard. Manually dismissed via the View's
-    /// "x" button (sets to nil).
-    public var errorMessage: String?
-
-    @ObservationIgnored
-    private let service: CuratorService
-
     public init(context: ServerContext) {
         self.context = context
-        self.service = CuratorService(context: context)
     }
 
-    // MARK: - Loads
-
     public func load() async {
         isLoading = true
         defer { isLoading = false }
         let context = self.context
         // v2.8 — instrumented. Curator load fires `hermes curator
-        // status` (CLI subprocess) plus 1-2 file reads; on remote each
-        // is a separate SSH RTT. Visibility lets future captures show
-        // how often the report file is missing or oversized.
+        // status` (CLI subprocess) plus 1-2 file reads; on remote
+        // each is a separate SSH RTT. Visibility lets future captures
+        // show how often the report file is missing or oversized.
         let parsed = await ScarfMon.measureAsync(.diskIO, "curator.load") {
             await Task.detached(priority: .userInitiated) { () -> (HermesCuratorStatus, String?) in
                 let textResult = Self.runCuratorStatus(context: context)
@@ -101,156 +69,46 @@ public final class CuratorViewModel {
         self.lastReportMarkdown = parsed.1
     }
 
-    /// Refresh the archived-skills list. No-op on hosts without
-    /// `hasCuratorArchive` — the caller gates the call.
-    public func loadArchive() async {
-        isLoadingArchive = true
-        defer { isLoadingArchive = false }
-        do {
-            archivedSkills = try await service.listArchived()
-        } catch {
-            archivedSkills = []
-            errorMessage = (error as? LocalizedError)?.errorDescription
-                ?? error.localizedDescription
-        }
-    }
-
-    // MARK: - Writes (v0.12)
-
-    /// Run the curator manually. On v0.13+ hosts this blocks for the
-    /// duration of the run (default 600s timeout); pre-v0.13 returns
-    /// immediately. Caller passes the capability-decided flag.
-    public func runNow(synchronous: Bool, timeout: TimeInterval = 600) async {
-        await runWithReload(
-            verb: "run",
-            successMessage: synchronous ? "Curator run complete" : "Curator run started"
-        ) {
-            try await self.service.runNow(synchronous: synchronous, timeout: timeout)
-        }
+    public func runNow() async {
+        await runAndReload(args: ["curator", "run"], successMessage: "Curator run started")
     }
 
     public func pause() async {
-        await runWithReload(verb: "pause", successMessage: "Curator paused") {
-            try await self.service.pause()
-        }
+        await runAndReload(args: ["curator", "pause"], successMessage: "Curator paused")
     }
 
     public func resume() async {
-        await runWithReload(verb: "resume", successMessage: "Curator resumed") {
-            try await self.service.resume()
-        }
+        await runAndReload(args: ["curator", "resume"], successMessage: "Curator resumed")
     }
 
     public func pin(_ skill: String) async {
-        await runWithReload(verb: "pin", successMessage: "Pinned \(skill)") {
-            try await self.service.pin(skill)
-        }
+        await runAndReload(args: ["curator", "pin", skill], successMessage: "Pinned \(skill)")
     }
 
     public func unpin(_ skill: String) async {
-        await runWithReload(verb: "unpin", successMessage: "Unpinned \(skill)") {
-            try await self.service.unpin(skill)
-        }
+        await runAndReload(args: ["curator", "unpin", skill], successMessage: "Unpinned \(skill)")
     }
 
     public func restore(_ skill: String) async {
-        await runWithReload(verb: "restore", successMessage: "Restored \(skill)") {
-            try await self.service.restore(skill)
-        }
-        // Restore drops the entry from the archived list — refresh it
-        // so the row disappears immediately.
-        await loadArchive()
+        await runAndReload(args: ["curator", "restore", skill], successMessage: "Restored \(skill)")
     }
 
-    // MARK: - Writes (v0.13)
-
-    public func archive(_ skill: String) async {
-        pendingArchiveName = skill
-        await runWithReload(verb: "archive", successMessage: "Archived \(skill)") {
-            try await self.service.archive(skill)
-        }
-        pendingArchiveName = nil
-        await loadArchive()
-    }
-
-    /// Stage 1 of the bulk-prune flow. Calls `prune --dry-run` and
-    /// populates `pruneSummary`; the View binds its confirm sheet to
-    /// the non-nil presence of this property.
-    public func planPrune() async {
-        do {
-            pruneSummary = try await service.prune(dryRun: true)
-        } catch {
-            errorMessage = (error as? LocalizedError)?.errorDescription
-                ?? error.localizedDescription
-            pruneSummary = nil
-        }
-    }
-
-    /// Stage 2 of the bulk-prune flow. Destructive — removes everything
-    /// currently archived. Clears `pruneSummary` regardless of outcome
-    /// so the confirm sheet dismisses.
-    public func confirmPrune() async {
-        isPruning = true
-        do {
-            _ = try await service.prune(dryRun: false)
-            transientMessage = "Pruned archived skills"
-            errorMessage = nil
-            await loadArchive()
-            await load()
-            scheduleTransientClear()
-        } catch {
-            errorMessage = (error as? LocalizedError)?.errorDescription
-                ?? error.localizedDescription
-        }
-        isPruning = false
-        pruneSummary = nil
-    }
-
-    /// Cancel the in-flight prune-confirm flow without running.
-    public func cancelPrune() {
-        pruneSummary = nil
-    }
-
-    /// User-driven dismissal of the inline error banner.
-    public func dismissError() {
-        errorMessage = nil
-    }
-
-    // MARK: - Helpers
-
-    /// Run a service call, route success → `transientMessage`, failure
-    /// → `errorMessage`, and reload `status` either way. Mirrors the
-    /// previous `runAndReload` helper but goes through the typed
-    /// service surface.
-    private func runWithReload(
-        verb: String,
-        successMessage: String,
-        body: @escaping @Sendable () async throws -> Void
-    ) async {
-        do {
-            try await body()
-            transientMessage = successMessage
-            errorMessage = nil
-            await load()
-            scheduleTransientClear()
-        } catch {
-            let message = (error as? LocalizedError)?.errorDescription
-                ?? error.localizedDescription
-            errorMessage = message
-            transientMessage = nil
-            await load()
-        }
-    }
-
-    private func scheduleTransientClear() {
+    private func runAndReload(args: [String], successMessage: String) async {
+        let context = self.context
+        let exitCode = await Task.detached(priority: .userInitiated) {
+            Self.runHermes(context: context, args: args).exitCode
+        }.value
+        transientMessage = exitCode == 0 ? successMessage : "Command failed"
+        await load()
+        // Auto-clear toast after 3s.
         Task { @MainActor [weak self] in
             try? await Task.sleep(nanoseconds: 3_000_000_000)
             self?.transientMessage = nil
         }
     }
 
-    // MARK: - Legacy sync helpers (kept for `load`'s detached path)
-
+    /// Wrap the transport-level `runProcess` so the call sites don't
+    /// have to reach for it directly. Combined stdout+stderr.
     nonisolated private static func runHermes(
         context: ServerContext,
         args: [String]

scarf/Packages/ScarfCore/Tests/ScarfCoreTests/GatewayAllowlistKindTests.swift

@@ -0,0 +1,70 @@
+import Testing
+import Foundation
+@testable import ScarfCore
+
+/// Pure mapping tests for `GatewayAllowlistKind`. Locks down the (platform →
+/// kind) table so a refactor doesn't accidentally drop a platform.
+@Suite struct GatewayAllowlistKindTests {
+
+    @Test func mapsKnownPlatformsToCorrectKind() {
+        #expect(GatewayAllowlistKind.kind(for: "slack")      == .channels)
+        #expect(GatewayAllowlistKind.kind(for: "mattermost") == .channels)
+        #expect(GatewayAllowlistKind.kind(for: "google-chat") == .channels)
+        #expect(GatewayAllowlistKind.kind(for: "telegram")   == .chats)
+        #expect(GatewayAllowlistKind.kind(for: "whatsapp")   == .chats)
+        #expect(GatewayAllowlistKind.kind(for: "matrix")     == .rooms)
+        #expect(GatewayAllowlistKind.kind(for: "dingtalk")   == .rooms)
+    }
+
+    @Test func acceptsBothGoogleChatSpellings() {
+        // // TODO(WS-5-Q1) — both spellings round-trip until Hermes confirms
+        // the wire identifier.
+        #expect(GatewayAllowlistKind.kind(for: "google-chat") == .channels)
+        #expect(GatewayAllowlistKind.kind(for: "googlechat")  == .channels)
+    }
+
+    @Test func returnsNilForPlatformsWithoutAllowlist() {
+        #expect(GatewayAllowlistKind.kind(for: "cli")            == nil)
+        #expect(GatewayAllowlistKind.kind(for: "yuanbao")        == nil)
+        #expect(GatewayAllowlistKind.kind(for: "microsoft-teams") == nil)
+        #expect(GatewayAllowlistKind.kind(for: "discord")        == nil)
+        #expect(GatewayAllowlistKind.kind(for: "signal")         == nil)
+        #expect(GatewayAllowlistKind.kind(for: "homeassistant")  == nil)
+        #expect(GatewayAllowlistKind.kind(for: "")               == nil)
+        #expect(GatewayAllowlistKind.kind(for: "unknown")        == nil)
+    }
+
+    @Test func yamlKeyMatchesHermesContract() {
+        #expect(GatewayAllowlistKind.channels.yamlKey == "allowed_channels")
+        #expect(GatewayAllowlistKind.chats.yamlKey    == "allowed_chats")
+        #expect(GatewayAllowlistKind.rooms.yamlKey    == "allowed_rooms")
+    }
+
+    @Test func nounsAreUserFacingSafe() {
+        #expect(GatewayAllowlistKind.channels.noun == "channel")
+        #expect(GatewayAllowlistKind.chats.noun    == "chat")
+        #expect(GatewayAllowlistKind.rooms.noun    == "room")
+        #expect(GatewayAllowlistKind.channels.pluralNoun == "channels")
+        #expect(GatewayAllowlistKind.chats.pluralNoun    == "chats")
+        #expect(GatewayAllowlistKind.rooms.pluralNoun    == "rooms")
+    }
+
+    @Test func placeholdersAreNonEmpty() {
+        // Smoke test — placeholder strings are advisory; we just don't want
+        // them silently emptied during a refactor.
+        #expect(!GatewayAllowlistKind.channels.inputPlaceholder.isEmpty)
+        #expect(!GatewayAllowlistKind.chats.inputPlaceholder.isEmpty)
+        #expect(!GatewayAllowlistKind.rooms.inputPlaceholder.isEmpty)
+    }
+
+    @Test func gatewayPlatformSettingsItemsForKind() {
+        let s = GatewayPlatformSettings(
+            allowedChannels: ["C01"],
+            allowedChats: ["@user"],
+            allowedRooms: ["!room:matrix.org"]
+        )
+        #expect(s.items(for: .channels) == ["C01"])
+        #expect(s.items(for: .chats)    == ["@user"])
+        #expect(s.items(for: .rooms)    == ["!room:matrix.org"])
+    }
+}

scarf/Packages/ScarfCore/Tests/ScarfCoreTests/GatewayConfigWriterTests.swift

@@ -0,0 +1,276 @@
+import Testing
+import Foundation
+@testable import ScarfCore
+
+/// Round-trip + idempotence tests for `GatewayConfigWriter.setList`. Pure
+/// `String` operations only — runs cleanly on Linux SwiftPM.
+@Suite struct GatewayConfigWriterTests {
+
+    // MARK: - Insert
+
+    @Test func setListInsertsBlockOnEmpty() {
+        let yaml = ""
+        let updated = GatewayConfigWriter.setList(
+            in: yaml,
+            platform: "slack",
+            key: "allowed_channels",
+            items: ["C0123ABCD", "C0456EFGH"]
+        )
+        #expect(updated.contains("gateway:"))
+        #expect(updated.contains("  platforms:"))
+        #expect(updated.contains("    slack:"))
+        #expect(updated.contains("      allowed_channels:"))
+        #expect(updated.contains("- C0123ABCD"))
+        #expect(updated.contains("- C0456EFGH"))
+    }
+
+    @Test func setListAppendsScaffoldPreservingPriorContent() {
+        let yaml = """
+        model:
+          default: gpt-4o
+          provider: openai
+        """
+        let updated = GatewayConfigWriter.setList(
+            in: yaml,
+            platform: "slack",
+            key: "allowed_channels",
+            items: ["C01"]
+        )
+        // Original content preserved verbatim at the top.
+        #expect(updated.contains("model:"))
+        #expect(updated.contains("  default: gpt-4o"))
+        #expect(updated.contains("  provider: openai"))
+        // New scaffold appended.
+        #expect(updated.contains("gateway:"))
+        #expect(updated.contains("    slack:"))
+        #expect(updated.contains("- C01"))
+    }
+
+    // MARK: - Replace
+
+    @Test func setListReplacesExistingBlock() {
+        let yaml = """
+        gateway:
+          platforms:
+            slack:
+              allowed_channels:
+                - C_OLD_1
+                - C_OLD_2
+        """
+        let updated = GatewayConfigWriter.setList(
+            in: yaml,
+            platform: "slack",
+            key: "allowed_channels",
+            items: ["C_NEW_1"]
+        )
+        #expect(updated.contains("- C_NEW_1"))
+        #expect(!updated.contains("- C_OLD_1"))
+        #expect(!updated.contains("- C_OLD_2"))
+    }
+
+    @Test func setListPreservesScalarSiblings() {
+        // The `busy_ack_enabled` scalar sibling of `allowed_channels` must
+        // stay byte-for-byte after a list-write to the same platform.
+        let yaml = """
+        gateway:
+          platforms:
+            slack:
+              allowed_channels:
+                - C_OLD
+              busy_ack_enabled: false
+              gateway_restart_notification: true
+        """
+        let updated = GatewayConfigWriter.setList(
+            in: yaml,
+            platform: "slack",
+            key: "allowed_channels",
+            items: ["C_NEW"]
+        )
+        #expect(updated.contains("- C_NEW"))
+        #expect(!updated.contains("- C_OLD"))
+        // Scalars at the same indent must survive.
+        #expect(updated.contains("busy_ack_enabled: false"))
+        #expect(updated.contains("gateway_restart_notification: true"))
+    }
+
+    @Test func setListPreservesOtherPlatformsBlocks() {
+        // Editing slack must not touch matrix.
+        let yaml = """
+        gateway:
+          platforms:
+            slack:
+              allowed_channels:
+                - C_SLACK
+            matrix:
+              allowed_rooms:
+                - '!room1:matrix.org'
+                - '!room2:matrix.org'
+        """
+        let updated = GatewayConfigWriter.setList(
+            in: yaml,
+            platform: "slack",
+            key: "allowed_channels",
+            items: ["C_SLACK_NEW"]
+        )
+        #expect(updated.contains("- C_SLACK_NEW"))
+        // Matrix block intact.
+        #expect(updated.contains("    matrix:"))
+        #expect(updated.contains("'!room1:matrix.org'"))
+        #expect(updated.contains("'!room2:matrix.org'"))
+    }
+
+    // MARK: - Remove
+
+    @Test func setListWithEmptyItemsRemovesBlock() {
+        let yaml = """
+        gateway:
+          platforms:
+            slack:
+              allowed_channels:
+                - C01
+                - C02
+              busy_ack_enabled: true
+        """
+        let updated = GatewayConfigWriter.setList(
+            in: yaml,
+            platform: "slack",
+            key: "allowed_channels",
+            items: []
+        )
+        // Block removed; sibling scalar preserved.
+        #expect(!updated.contains("allowed_channels:"))
+        #expect(!updated.contains("- C01"))
+        #expect(!updated.contains("- C02"))
+        #expect(updated.contains("busy_ack_enabled: true"))
+    }
+
+    @Test func setListWithEmptyItemsOnAbsentBlockIsNoOp() {
+        let yaml = """
+        model:
+          default: gpt-4o
+        """
+        let updated = GatewayConfigWriter.setList(
+            in: yaml,
+            platform: "slack",
+            key: "allowed_channels",
+            items: []
+        )
+        #expect(updated == yaml)
+    }
+
+    // MARK: - Idempotence
+
+    @Test func setListIsIdempotent() {
+        let yaml = """
+        model:
+          default: gpt-4o
+        """
+        let once = GatewayConfigWriter.setList(
+            in: yaml,
+            platform: "telegram",
+            key: "allowed_chats",
+            items: ["@alice", "@bob"]
+        )
+        let twice = GatewayConfigWriter.setList(
+            in: once,
+            platform: "telegram",
+            key: "allowed_chats",
+            items: ["@alice", "@bob"]
+        )
+        #expect(once == twice)
+    }
+
+    @Test func setListReplaceThenReplaceIsStable() {
+        let yaml = ""
+        let a = GatewayConfigWriter.setList(
+            in: yaml, platform: "matrix", key: "allowed_rooms",
+            items: ["!a:m", "!b:m"]
+        )
+        let b = GatewayConfigWriter.setList(
+            in: a, platform: "matrix", key: "allowed_rooms",
+            items: ["!c:m"]
+        )
+        #expect(b.contains("- '!c:m'"))
+        #expect(!b.contains("'!a:m'"))
+        #expect(!b.contains("'!b:m'"))
+    }
+
+    // MARK: - Quoting
+
+    @Test func setListQuotesItemsContainingColons() {
+        // Matrix room IDs contain `:` — must be single-quoted.
+        let yaml = ""
+        let updated = GatewayConfigWriter.setList(
+            in: yaml, platform: "matrix", key: "allowed_rooms",
+            items: ["!RoomId:matrix.org"]
+        )
+        #expect(updated.contains("'!RoomId:matrix.org'"))
+    }
+
+    @Test func setListQuotesItemsStartingWithAt() {
+        // Telegram usernames `@alice`.
+        let yaml = ""
+        let updated = GatewayConfigWriter.setList(
+            in: yaml, platform: "telegram", key: "allowed_chats",
+            items: ["@alice"]
+        )
+        #expect(updated.contains("'@alice'"))
+    }
+
+    @Test func setListLeavesPlainAlphanumericUnquoted() {
+        // Slack channel IDs are A-Z0-9 — emit unquoted for readability.
+        let yaml = ""
+        let updated = GatewayConfigWriter.setList(
+            in: yaml, platform: "slack", key: "allowed_channels",
+            items: ["C0123ABCD"]
+        )
+        #expect(updated.contains("- C0123ABCD"))
+        #expect(!updated.contains("'C0123ABCD'"))
+    }
+
+    @Test func setListEscapesEmbeddedSingleQuotes() {
+        let yaml = ""
+        let updated = GatewayConfigWriter.setList(
+            in: yaml, platform: "slack", key: "allowed_channels",
+            items: ["weird:'name"]
+        )
+        // Embedded single quote doubled per YAML spec.
+        #expect(updated.contains("'weird:''name'"))
+    }
+
+    // MARK: - Insertion when ancestors exist but key is absent
+
+    @Test func setListInsertsKeyUnderExistingPlatformBlock() {
+        // `gateway → platforms → slack` exists with a busy_ack_enabled
+        // scalar; `allowed_channels` is missing. Add it without disturbing
+        // the scalar sibling.
+        let yaml = """
+        gateway:
+          platforms:
+            slack:
+              busy_ack_enabled: false
+        """
+        let updated = GatewayConfigWriter.setList(
+            in: yaml, platform: "slack", key: "allowed_channels",
+            items: ["C42"]
+        )
+        #expect(updated.contains("busy_ack_enabled: false"))
+        #expect(updated.contains("allowed_channels:"))
+        #expect(updated.contains("- C42"))
+    }
+
+    // MARK: - Round-trip with the YAML loader
+
+    @Test func roundTripsThroughHermesConfigYAMLLoader() {
+        // Write a list, then parse the result through HermesConfig+YAML and
+        // confirm we read back what we wrote.
+        var yaml = ""
+        yaml = GatewayConfigWriter.setList(
+            in: yaml, platform: "slack", key: "allowed_channels",
+            items: ["C01", "C02"]
+        )
+        let cfg = HermesConfig(yaml: yaml)
+        let block = cfg.gatewayPlatforms["slack"]
+        #expect(block?.allowedChannels == ["C01", "C02"])
+    }
+}

scarf/Packages/ScarfCore/Tests/ScarfCoreTests/HermesCuratorParserTests.swift

@@ -151,169 +151,4 @@ import Foundation
         #expect(parsed?.patchCount == 2)
         #expect(parsed?.lastActivityLabel == "2026-04-25")
     }
-
-    // MARK: - v0.13 list-archived / prune fixtures (WS-4)
-
-    /// Empty JSON array → `[]`. Locks in the happy-path no-archives shape.
-    @Test func listArchivedEmpty() throws {
-        let result = try CuratorService.parseListArchived(stdout: "[]")
-        #expect(result.isEmpty)
-    }
-
-    /// Three archives with full optional fields. Asserts each
-    /// optional value decodes through `decodeIfPresent` and that
-    /// the computed labels resolve.
-    @Test func listArchivedThreeSkills() throws {
-        let json = """
-        [
-          {
-            "name": "legacy-helper",
-            "category": "templates",
-            "archived_at": "2026-04-22T03:14:09Z",
-            "reason": "stale: 91d unused",
-            "size_bytes": 4521,
-            "path": "/Users/u/.hermes/skills/.archived/legacy-helper"
-          },
-          {
-            "name": "old-translator",
-            "category": "user",
-            "archived_at": "2026-04-23T10:00:00Z",
-            "reason": "consolidated with translator",
-            "size_bytes": 8192
-          },
-          {
-            "name": "minimal"
-          }
-        ]
-        """
-        let result = try CuratorService.parseListArchived(stdout: json)
-        #expect(result.count == 3)
-        #expect(result[0].name == "legacy-helper")
-        #expect(result[0].category == "templates")
-        #expect(result[0].reason == "stale: 91d unused")
-        #expect(result[0].sizeBytes == 4521)
-        #expect(result[0].archivedAtLabel == "2026-04-22")
-        #expect(result[0].path == "/Users/u/.hermes/skills/.archived/legacy-helper")
-
-        // Tolerant: only `name` set on the third row.
-        #expect(result[2].name == "minimal")
-        #expect(result[2].category == nil)
-        #expect(result[2].reason == nil)
-        #expect(result[2].archivedAtLabel == "—")
-        #expect(result[2].sizeLabel == "—")
-    }
-
-    /// `{"archived": [...]}` envelope is also accepted.
-    @Test func listArchivedEnvelope() throws {
-        let json = """
-        {"archived": [
-          {"name": "envelope-skill", "size_bytes": 1024}
-        ]}
-        """
-        let result = try CuratorService.parseListArchived(stdout: json)
-        #expect(result.count == 1)
-        #expect(result[0].name == "envelope-skill")
-    }
-
-    /// Text fallback when `--json` isn't supported. Each row carries
-    /// the name in column 1 plus k=v chips for the optional fields.
-    @Test func listArchivedTextFallback() {
-        let text = """
-          legacy-helper      archived=2026-04-22 size=4521 reason=stale
-          old-translator     archived=2026-04-23 size=8192
-          minimal-row
-        """
-        let result = CuratorService.parseListArchivedText(text)
-        #expect(result.count == 3)
-        #expect(result[0].name == "legacy-helper")
-        #expect(result[0].archivedAt == "2026-04-22")
-        #expect(result[0].sizeBytes == 4521)
-        #expect(result[0].reason == "stale")
-        #expect(result[2].name == "minimal-row")
-        #expect(result[2].sizeBytes == nil)
-    }
-
-    /// Empty-state sentinel folds to `[]` (parallel to KanbanService's
-    /// `"no matching tasks"` handling).
-    @Test func listArchivedNoArchivedSentinel() throws {
-        let result = try CuratorService.parseListArchived(stdout: "no archived skills\n")
-        #expect(result.isEmpty)
-    }
-
-    /// Whitespace-only stdout also folds to empty.
-    @Test func listArchivedWhitespaceFoldsToEmpty() throws {
-        let result = try CuratorService.parseListArchived(stdout: "   \n\n")
-        #expect(result.isEmpty)
-    }
-
-    /// Decode failure (clearly non-JSON, non-text) throws. We accept
-    /// JSON, the envelope, the empty sentinel, or text rows; anything
-    /// else surfaces as a `CuratorError.decoding`.
-    @Test func listArchivedNonsenseThrows() throws {
-        do {
-            _ = try CuratorService.parseListArchived(stdout: "{garbage")
-            Issue.record("expected decoding throw")
-        } catch let error as CuratorError {
-            if case .decoding = error {
-                // expected
-            } else {
-                Issue.record("unexpected error \(error)")
-            }
-        }
-    }
-
-    /// Prune-dry-run JSON with `would_remove` + `total_bytes`.
-    @Test func pruneDryRunHappyPath() {
-        let json = """
-        {
-          "would_remove": [
-            {"name": "stale-a", "size_bytes": 1000},
-            {"name": "stale-b", "size_bytes": 2000}
-          ],
-          "total_bytes": 3000
-        }
-        """
-        let summary = CuratorService.parsePruneDryRun(json)
-        #expect(summary.totalCount == 2)
-        #expect(summary.totalBytes == 3000)
-        #expect(summary.wouldRemove.first?.name == "stale-a")
-    }
-
-    /// Zero-skill prune is a valid dry-run (no archives).
-    @Test func pruneDryRunZeroSkills() {
-        let json = """
-        {"would_remove": [], "total_bytes": 0}
-        """
-        let summary = CuratorService.parsePruneDryRun(json)
-        #expect(summary.totalCount == 0)
-        #expect(summary.totalBytes == 0)
-        #expect(summary.totalBytesLabel == "—")
-    }
-
-    /// Bare-array fallback: some Hermes builds may print just the
-    /// would-remove list when the wrapper is missing.
-    @Test func pruneDryRunBareArrayFallback() {
-        let json = """
-        [{"name": "lonely", "size_bytes": 500}]
-        """
-        let summary = CuratorService.parsePruneDryRun(json)
-        #expect(summary.totalCount == 1)
-        #expect(summary.totalBytes == 500)
-    }
-
-    /// Empty / whitespace stdout → zero summary (no decoding throw).
-    @Test func pruneDryRunEmptyStaysSafe() {
-        let summary = CuratorService.parsePruneDryRun("   \n")
-        #expect(summary.totalCount == 0)
-        #expect(summary.totalBytes == 0)
-    }
-
-    /// Verify the size label uses the byte formatter (not raw bytes).
-    @Test func archivedSkillSizeLabelFormats() {
-        let big = HermesCuratorArchivedSkill(name: "x", sizeBytes: 1_500_000)
-        // ByteCountFormatter produces a localized label; just verify
-        // it's non-empty and not raw "1500000".
-        #expect(!big.sizeLabel.isEmpty)
-        #expect(big.sizeLabel != "1500000")
-    }
 }

scarf/Packages/ScarfCore/Tests/ScarfCoreTests/HermesGatewayListServiceTests.swift

@@ -0,0 +1,131 @@
+import Testing
+import Foundation
+@testable import ScarfCore
+
+/// Parser tests for `hermes gateway list --json`. Pure — no transport, no
+/// process calls.
+@Suite struct HermesGatewayListServiceTests {
+
+    private func data(_ s: String) -> Data { s.data(using: .utf8)! }
+
+    @Test func parsesSingleProfileSinglePlatform() {
+        let json = data(#"""
+        {"profiles":[{"name":"default","running":true,"pid":1234,
+        "platforms":["slack","telegram"]}]}
+        """#)
+        let snap = HermesGatewayListService.parse(json)
+        #expect(snap?.profiles.count == 1)
+        #expect(snap?.profiles[0].profile == "default")
+        #expect(snap?.profiles[0].pid == 1234)
+        #expect(snap?.profiles[0].isRunning == true)
+        #expect(snap?.profiles[0].platforms == ["slack", "telegram"])
+    }
+
+    @Test func parsesMultipleProfiles() {
+        let json = data(#"""
+        {"profiles":[
+            {"name":"work","running":true,"pid":2001,"platforms":["slack"]},
+            {"name":"personal","running":false,"platforms":["telegram"]}
+        ]}
+        """#)
+        let snap = HermesGatewayListService.parse(json)
+        #expect(snap?.profiles.count == 2)
+        #expect(snap?.profiles[0].profile == "work")
+        #expect(snap?.profiles[0].isRunning == true)
+        #expect(snap?.profiles[1].profile == "personal")
+        #expect(snap?.profiles[1].isRunning == false)
+        #expect(snap?.profiles[1].pid == nil)
+    }
+
+    @Test func parsesBareArrayShape() {
+        // Tolerance for a top-level array (no `profiles` wrapper).
+        let json = data(#"""
+        [{"name":"default","running":true,"pid":42,"platforms":["discord"]}]
+        """#)
+        let snap = HermesGatewayListService.parse(json)
+        #expect(snap?.profiles.count == 1)
+        #expect(snap?.profiles[0].profile == "default")
+    }
+
+    @Test func toleratesAlternateFieldNames() {
+        // `profile` instead of `name`, `state` instead of `running`,
+        // `connected_platforms` instead of `platforms` — defensive defaults
+        // keep the parser happy if Hermes ships any of these.
+        let json = data(#"""
+        {"profiles":[{"profile":"alt","state":"running","pid":7,
+        "connected_platforms":["matrix"]}]}
+        """#)
+        let snap = HermesGatewayListService.parse(json)
+        #expect(snap?.profiles[0].profile == "alt")
+        #expect(snap?.profiles[0].isRunning == true)
+        #expect(snap?.profiles[0].platforms == ["matrix"])
+    }
+
+    @Test func returnsNilOnEmptyData() {
+        #expect(HermesGatewayListService.parse(Data()) == nil)
+    }
+
+    @Test func returnsNilOnUnparseableJSON() {
+        let json = data("not-json")
+        #expect(HermesGatewayListService.parse(json) == nil)
+    }
+
+    @Test func returnsEmptySnapshotOnEmptyProfilesArray() {
+        let json = data(#"{"profiles":[]}"#)
+        let snap = HermesGatewayListService.parse(json)
+        #expect(snap?.profiles.isEmpty == true)
+    }
+
+    @Test func toleratesUnknownKeys() {
+        // Forward-compat: a future v0.13.x Hermes adds extra fields, parser
+        // still works.
+        let json = data(#"""
+        {"profiles":[{"name":"default","running":true,"platforms":["slack"],
+        "future_field":"value","another":42}]}
+        """#)
+        let snap = HermesGatewayListService.parse(json)
+        #expect(snap?.profiles[0].profile == "default")
+    }
+
+    // MARK: - headerDigest
+
+    @Test func headerDigestEmptyProfiles() {
+        let snap = GatewayListSnapshot(profiles: [])
+        #expect(snap.headerDigest == "no profiles configured")
+    }
+
+    @Test func headerDigestSingleProfileRunning() {
+        let snap = GatewayListSnapshot(profiles: [
+            .init(profile: "default", isRunning: true, pid: 100,
+                  platforms: ["slack", "telegram"])
+        ])
+        #expect(snap.headerDigest == "default profile · running · slack, telegram")
+    }
+
+    @Test func headerDigestSingleProfileStopped() {
+        let snap = GatewayListSnapshot(profiles: [
+            .init(profile: "default", isRunning: false, pid: nil, platforms: [])
+        ])
+        #expect(snap.headerDigest == "default profile · stopped")
+    }
+
+    @Test func headerDigestMultipleProfilesSomeRunning() {
+        let snap = GatewayListSnapshot(profiles: [
+            .init(profile: "work", isRunning: true, pid: 1, platforms: ["slack"]),
+            .init(profile: "home", isRunning: false, pid: nil, platforms: ["matrix"]),
+            .init(profile: "extra", isRunning: true, pid: 2, platforms: [])
+        ])
+        // 3 profiles total, 2 running, surface first running profile's
+        // platform list as the highlight.
+        #expect(snap.headerDigest == "3 profiles (2 running) · work: slack")
+    }
+
+    @Test func headerDigestMultipleProfilesNoneRunning() {
+        let snap = GatewayListSnapshot(profiles: [
+            .init(profile: "a", isRunning: false, pid: nil, platforms: ["slack"]),
+            .init(profile: "b", isRunning: false, pid: nil, platforms: ["matrix"])
+        ])
+        // No running profile — fall back to the first profile's platforms.
+        #expect(snap.headerDigest == "2 profiles (0 running) · a: slack")
+    }
+}

scarf/Packages/ScarfCore/Tests/ScarfCoreTests/M6ConfigCronTests.swift

@@ -228,6 +228,87 @@ import Foundation
         #expect(c.timezone == "America/New_York")
     }
 
+    // MARK: - v0.13 gateway.platforms.<platform> block
+
+    @Test func gatewayPlatformsEmptyByDefault() {
+        let c = HermesConfig(yaml: "")
+        #expect(c.gatewayPlatforms.isEmpty)
+    }
+
+    @Test func parsesGatewayAllowlistsForSlack() {
+        let yaml = """
+        gateway:
+          platforms:
+            slack:
+              allowed_channels:
+                - C01
+                - C02
+              busy_ack_enabled: false
+              gateway_restart_notification: true
+              slash_command_notice_ttl_seconds: 120
+        """
+        let cfg = HermesConfig(yaml: yaml)
+        let block = cfg.gatewayPlatforms["slack"]
+        #expect(block?.allowedChannels == ["C01", "C02"])
+        #expect(block?.busyAckEnabled == false)
+        #expect(block?.gatewayRestartNotification == true)
+        #expect(block?.slashCommandNoticeTTLSeconds == 120)
+    }
+
+    @Test func parsesGatewayAllowlistsForTelegramAndMatrix() {
+        let yaml = """
+        gateway:
+          platforms:
+            telegram:
+              allowed_chats:
+                - '@alice'
+                - '12345'
+            matrix:
+              allowed_rooms:
+                - '!room:matrix.org'
+        """
+        let cfg = HermesConfig(yaml: yaml)
+        #expect(cfg.gatewayPlatforms["telegram"]?.allowedChats == ["@alice", "12345"])
+        #expect(cfg.gatewayPlatforms["matrix"]?.allowedRooms == ["!room:matrix.org"])
+    }
+
+    @Test func gatewayBlockCoexistsWithLegacyPlatformBlocks() {
+        // Regression: legacy `platforms.slack.reply_to_mode` and
+        // `matrix.require_mention` must keep parsing when the new
+        // `gateway:` block is also present — no key collisions.
+        let yaml = """
+        platforms:
+          slack:
+            reply_to_mode: all
+        matrix:
+          require_mention: false
+        gateway:
+          platforms:
+            slack:
+              allowed_channels:
+                - C01
+        """
+        let cfg = HermesConfig(yaml: yaml)
+        #expect(cfg.slack.replyToMode == "all")
+        #expect(cfg.matrix.requireMention == false)
+        #expect(cfg.gatewayPlatforms["slack"]?.allowedChannels == ["C01"])
+    }
+
+    @Test func gatewayPlatformsSkipsPlatformsWithoutV013Keys() {
+        // The `gateway:` block exists but only Slack has a v0.13 key —
+        // platforms without keys must NOT appear in `gatewayPlatforms`.
+        let yaml = """
+        gateway:
+          platforms:
+            slack:
+              busy_ack_enabled: true
+        """
+        let cfg = HermesConfig(yaml: yaml)
+        #expect(cfg.gatewayPlatforms["slack"] != nil)
+        #expect(cfg.gatewayPlatforms["mattermost"] == nil)
+        #expect(cfg.gatewayPlatforms["telegram"] == nil)
+    }
+
     @Test func cronScheduleMemberwise() {
         let s = CronSchedule(
             kind: "cron",

scarf/Scarf iOS/Curator/CuratorView.swift

@@ -13,24 +13,11 @@ import ScarfDesign
 /// `HermesCapabilities.hasCurator` is true.
 struct CuratorView: View {
     @State private var viewModel: CuratorViewModel
-    @Environment(\.hermesCapabilities) private var capabilitiesStore
-
-    // TODO(WS-9): add a read-only "Archived" section mirroring the Mac
-    // surface (no per-row Restore/Prune mutations on iOS in this
-    // release). Gate on `capabilitiesStore?.capabilities.hasCuratorArchive`.
 
     init(context: ServerContext) {
         _viewModel = State(initialValue: CuratorViewModel(context: context))
     }
 
-    /// Whether the connected host runs curator synchronously. Threaded
-    /// into `runNow` so v0.13+ hosts block-with-spinner; pre-v0.13 fire
-    /// and forget. WS-9 will surface a richer iOS progress affordance
-    /// alongside the read-only Archived section.
-    private var archiveAvailable: Bool {
-        capabilitiesStore?.capabilities.hasCuratorArchive ?? false
-    }
-
     var body: some View {
         List {
             Section {
@@ -128,7 +115,7 @@ struct CuratorView: View {
     private var actionFooter: some View {
         HStack(spacing: 8) {
             Button {
-                Task { await viewModel.runNow(synchronous: archiveAvailable, timeout: 600) }
+                Task { await viewModel.runNow() }
             } label: {
                 Label("Run now", systemImage: "play.fill")
             }

scarf/scarf/Core/Services/HermesFileService.swift

@@ -254,6 +254,47 @@ struct HermesFileService: Sendable {
             cooldownSeconds: int("platforms.homeassistant.extra.cooldown_seconds", default: 30)
         )
 
+        // -- v0.13: per-platform Messaging Gateway settings --------------
+        // Mirrors the canonical extractor in
+        // `ScarfCore/Parsing/HermesConfig+YAML.swift`. Behaviour parity
+        // matters: both parsers must populate `gatewayPlatforms` the same
+        // way so iOS and Mac surfaces stay in lockstep.
+        // TODO(WS-5-Q2): YAML key path unverified — see the comment in the
+        // ScarfCore extractor for the resolution path.
+        let gatewayAllowlistPlatforms = [
+            "slack", "mattermost", "google-chat",
+            "telegram", "whatsapp",
+            "matrix", "dingtalk",
+        ]
+        var gatewayPlatforms: [String: GatewayPlatformSettings] = [:]
+        for platform in gatewayAllowlistPlatforms {
+            let prefix = "gateway.platforms.\(platform)."
+            let allowedChannels = lists[prefix + "allowed_channels"] ?? []
+            let allowedChats    = lists[prefix + "allowed_chats"]    ?? []
+            let allowedRooms    = lists[prefix + "allowed_rooms"]    ?? []
+            let busy            = bool(prefix + "busy_ack_enabled", default: true)
+            let restartNotice   = bool(prefix + "gateway_restart_notification",
+                                       default: false)
+            let ttl             = int(prefix + "slash_command_notice_ttl_seconds",
+                                      default: 0)
+            let isEmpty = allowedChannels.isEmpty
+                && allowedChats.isEmpty
+                && allowedRooms.isEmpty
+                && values[prefix + "busy_ack_enabled"] == nil
+                && values[prefix + "gateway_restart_notification"] == nil
+                && values[prefix + "slash_command_notice_ttl_seconds"] == nil
+            if !isEmpty {
+                gatewayPlatforms[platform] = GatewayPlatformSettings(
+                    allowedChannels: allowedChannels,
+                    allowedChats: allowedChats,
+                    allowedRooms: allowedRooms,
+                    busyAckEnabled: busy,
+                    gatewayRestartNotification: restartNotice,
+                    slashCommandNoticeTTLSeconds: ttl
+                )
+            }
+        }
+
         return HermesConfig(
             model: str("model.default", default: "unknown"),
             provider: str("model.provider", default: "unknown"),
@@ -313,7 +354,8 @@ struct HermesFileService: Sendable {
             homeAssistant: homeAssistant,
             cacheTTL: str("prompt_caching.cache_ttl", default: "5m"),
             redactionEnabled: bool("redaction.enabled", default: false),
-            runtimeMetadataFooter: bool("agent.runtime_metadata_footer", default: false)
+            runtimeMetadataFooter: bool("agent.runtime_metadata_footer", default: false),
+            gatewayPlatforms: gatewayPlatforms
         )
     }
 

scarf/scarf/Features/Curator/Views/CuratorArchivedSection.swift

@@ -1,122 +0,0 @@
-import SwiftUI
-import ScarfCore
-import ScarfDesign
-
-/// Mac sub-view rendered between the active-skill leaderboards and the
-/// last-report block on Hermes v0.13+ hosts. Lists everything currently
-/// archived (`hermes curator list-archived`) with per-row Restore + a
-/// bulk Prune affordance routed through the parent's confirm sheet.
-///
-/// Empty-state copy explains what archive means — useful when the
-/// curator hasn't run yet on a fresh install (no archives ≠ a problem).
-struct CuratorArchivedSection: View {
-    let archived: [HermesCuratorArchivedSkill]
-    let isLoading: Bool
-    let onRestore: (String) -> Void
-    let onPruneAll: () -> Void
-
-    var body: some View {
-        ScarfCard {
-            VStack(alignment: .leading, spacing: ScarfSpace.s2) {
-                header
-                if isLoading && archived.isEmpty {
-                    loadingRow
-                } else if archived.isEmpty {
-                    emptyState
-                } else {
-                    rows
-                }
-            }
-        }
-    }
-
-    private var header: some View {
-        HStack(alignment: .firstTextBaseline) {
-            ScarfSectionHeader("Archived")
-            Spacer()
-            Text("\(archived.count) skill\(archived.count == 1 ? "" : "s")")
-                .scarfStyle(.caption)
-                .foregroundStyle(ScarfColor.foregroundMuted)
-            if !archived.isEmpty {
-                Button("Prune All…") {
-                    onPruneAll()
-                }
-                .buttonStyle(ScarfDestructiveButton())
-                .help("Remove every archived skill from disk. Cannot be undone.")
-            }
-        }
-    }
-
-    private var loadingRow: some View {
-        HStack(spacing: ScarfSpace.s2) {
-            ProgressView().controlSize(.small)
-            Text("Loading archived skills…")
-                .scarfStyle(.caption)
-                .foregroundStyle(ScarfColor.foregroundMuted)
-            Spacer()
-        }
-    }
-
-    private var emptyState: some View {
-        VStack(alignment: .leading, spacing: ScarfSpace.s1) {
-            Text("No archived skills.")
-                .scarfStyle(.body)
-                .foregroundStyle(ScarfColor.foregroundMuted)
-            Text("The curator moves stale or redundant skills here on its weekly review. Until then, this list stays empty.")
-                .scarfStyle(.caption)
-                .foregroundStyle(ScarfColor.foregroundFaint)
-        }
-    }
-
-    private var rows: some View {
-        VStack(alignment: .leading, spacing: ScarfSpace.s1) {
-            ForEach(archived) { skill in
-                ArchivedSkillRow(
-                    skill: skill,
-                    onRestore: { onRestore(skill.name) }
-                )
-            }
-        }
-    }
-}
-
-private struct ArchivedSkillRow: View {
-    let skill: HermesCuratorArchivedSkill
-    let onRestore: () -> Void
-
-    var body: some View {
-        HStack(alignment: .center, spacing: ScarfSpace.s2) {
-            Image(systemName: "archivebox.fill")
-                .font(.system(size: 12))
-                .foregroundStyle(ScarfColor.foregroundFaint)
-            VStack(alignment: .leading, spacing: 2) {
-                Text(skill.name)
-                    .scarfStyle(.body)
-                    .foregroundStyle(ScarfColor.foregroundPrimary)
-                    .lineLimit(1)
-                if let reason = skill.reason, !reason.isEmpty {
-                    Text(reason)
-                        .scarfStyle(.caption)
-                        .foregroundStyle(ScarfColor.foregroundMuted)
-                        .lineLimit(1)
-                }
-            }
-            .frame(maxWidth: .infinity, alignment: .leading)
-            Text(skill.archivedAtLabel)
-                .scarfStyle(.caption)
-                .foregroundStyle(ScarfColor.foregroundFaint)
-                .frame(width: 96, alignment: .trailing)
-            Text(skill.sizeLabel)
-                .scarfStyle(.caption)
-                .foregroundStyle(ScarfColor.foregroundFaint)
-                .frame(width: 72, alignment: .trailing)
-            Button("Restore") {
-                onRestore()
-            }
-            .buttonStyle(ScarfPrimaryButton())
-            .controlSize(.small)
-            .help("Restore \(skill.name) to the active skill set")
-        }
-        .padding(.vertical, 2)
-    }
-}

scarf/scarf/Features/Curator/Views/CuratorPruneConfirmSheet.swift

@@ -1,123 +0,0 @@
-import SwiftUI
-import ScarfCore
-import ScarfDesign
-
-/// Destructive-confirm sheet for `hermes curator prune` (bulk).
-///
-/// Pattern matches `TemplateUninstallSheet`: enumerate every entry that
-/// will be removed, surface the total count + bytes, and require an
-/// explicit click on a red `ScarfDestructiveButton` ("Prune
-/// permanently") before kicking off the destructive call. Cancel owns
-/// the keyboard default action so an accidental Enter-press doesn't
-/// nuke the archive.
-struct CuratorPruneConfirmSheet: View {
-    @Environment(\.dismiss) private var dismiss
-    let summary: CuratorPruneSummary
-    let isPruning: Bool
-    let onConfirm: () -> Void
-    let onCancel: () -> Void
-
-    var body: some View {
-        VStack(alignment: .leading, spacing: 0) {
-            header
-                .padding(.bottom, ScarfSpace.s2)
-            ScarfDivider()
-            ScrollView {
-                VStack(alignment: .leading, spacing: ScarfSpace.s2) {
-                    ForEach(summary.wouldRemove) { skill in
-                        row(skill: skill)
-                    }
-                    if summary.wouldRemove.isEmpty {
-                        Text("Nothing currently archived. Nothing to prune.")
-                            .scarfStyle(.caption)
-                            .foregroundStyle(ScarfColor.foregroundMuted)
-                            .padding(.vertical, ScarfSpace.s2)
-                    }
-                }
-                .padding(.vertical, ScarfSpace.s2)
-            }
-            ScarfDivider()
-            footer
-                .padding(.top, ScarfSpace.s2)
-        }
-        .frame(minWidth: 520, minHeight: 380)
-        .padding(ScarfSpace.s4)
-    }
-
-    private var header: some View {
-        VStack(alignment: .leading, spacing: ScarfSpace.s1) {
-            HStack(alignment: .firstTextBaseline) {
-                Text("Prune Archived Skills")
-                    .scarfStyle(.title2)
-                    .foregroundStyle(ScarfColor.foregroundPrimary)
-                Spacer()
-                if summary.totalCount > 0 {
-                    ScarfBadge("\(summary.totalCount)", kind: .danger)
-                }
-            }
-            Text("This permanently deletes every archived skill from disk. Restoring an archived skill is no longer possible after pruning.")
-                .scarfStyle(.caption)
-                .foregroundStyle(ScarfColor.foregroundMuted)
-                .fixedSize(horizontal: false, vertical: true)
-            if summary.totalBytes > 0 {
-                Text("Total to remove: \(summary.totalBytesLabel)")
-                    .scarfStyle(.caption)
-                    .foregroundStyle(ScarfColor.foregroundFaint)
-            }
-        }
-    }
-
-    private func row(skill: HermesCuratorArchivedSkill) -> some View {
-        HStack(spacing: ScarfSpace.s2) {
-            Image(systemName: "minus.circle")
-                .foregroundStyle(ScarfColor.danger)
-                .font(.caption)
-            VStack(alignment: .leading, spacing: 2) {
-                Text(skill.name)
-                    .scarfStyle(.body)
-                    .foregroundStyle(ScarfColor.foregroundPrimary)
-                    .lineLimit(1)
-                if let reason = skill.reason, !reason.isEmpty {
-                    Text(reason)
-                        .scarfStyle(.caption)
-                        .foregroundStyle(ScarfColor.foregroundMuted)
-                        .lineLimit(1)
-                }
-            }
-            Spacer()
-            Text(skill.archivedAtLabel)
-                .scarfStyle(.caption)
-                .foregroundStyle(ScarfColor.foregroundFaint)
-                .frame(width: 96, alignment: .trailing)
-            Text(skill.sizeLabel)
-                .scarfStyle(.caption)
-                .foregroundStyle(ScarfColor.foregroundFaint)
-                .frame(width: 72, alignment: .trailing)
-        }
-    }
-
-    private var footer: some View {
-        HStack {
-            Button("Cancel") {
-                onCancel()
-                dismiss()
-            }
-            .buttonStyle(ScarfGhostButton())
-            // Cancel owns .defaultAction so accidental Enter-presses
-            // don't trigger the destructive button (template-uninstall
-            // pattern recommended in the WS-4 plan).
-            .keyboardShortcut(.defaultAction)
-            .disabled(isPruning)
-            Spacer()
-            if isPruning {
-                ProgressView().controlSize(.small)
-            }
-            Button("Prune permanently") {
-                onConfirm()
-            }
-            .buttonStyle(ScarfDestructiveButton())
-            .disabled(isPruning || summary.wouldRemove.isEmpty)
-            .accessibilityIdentifier("curatorPrune.confirm")
-        }
-    }
-}

scarf/scarf/Features/Curator/Views/CuratorRestoreSheet.swift

@@ -2,16 +2,18 @@ import SwiftUI
 import ScarfCore
 import ScarfDesign
 
-/// Legacy v0.12 fallback for restoring an archived skill by typed
-/// name. Hermes v0.12 didn't ship `curator list-archived`, so the only
-/// way to restore was to remember the skill name and pass it through
-/// `hermes curator restore <name>`.
+/// Modal that lists archived skills (state ≠ active) and exposes a
+/// one-click "Restore" action per row. v0.12 archives are recoverable —
+/// `hermes curator restore <name>` brings the skill back into
+/// `~/.hermes/skills/<category>/<name>/` and re-marks it active.
 ///
-/// **v0.13+ flow (preferred):** `CuratorArchivedSection` renders a
-/// per-skill list with a one-click Restore button per row — no typing
-/// required. This sheet stays reachable from the overflow menu only on
-/// pre-v0.13 hosts (gated by `!hasCuratorArchive`). Don't delete this
-/// file even after WS-4 ships; v0.12 hosts still depend on it.
+/// The Curator's `status` text doesn't enumerate archived skills with
+/// names; we surface what's available (counts + pinned list) and rely
+/// on the user knowing the names. Hermes ergo does an interactive
+/// `--name` arg if missing — but Scarf prefers explicit selection so
+/// users don't have to remember names. For v2.6 we render a free-form
+/// text field; once Hermes ships a `curator list-archived` (tracked
+/// upstream), swap to a pickable list.
 struct CuratorRestoreSheet: View {
     let viewModel: CuratorViewModel
 

scarf/scarf/Features/Curator/Views/CuratorView.swift

@@ -2,52 +2,57 @@ import SwiftUI
 import ScarfCore
 import ScarfDesign
 
-/// Mac UI for Hermes's autonomous skill curator (v0.12 base + v0.13
-/// archive/prune surface).
+/// Mac UI for Hermes v0.12's autonomous skill curator.
 ///
 /// Surfaces the running state (enabled / paused / disabled), last-run
-/// metadata, agent-created skill counts, the most/least-active /
-/// least-recently-active leaderboards, and on v0.13+ hosts the new
-/// archived-skills section + per-row Archive button on each leaderboard
-/// entry. Pin / unpin / restore / archive / prune route through
-/// CuratorViewModel → CuratorService.
+/// metadata, agent-created skill counts, and the most/least-active /
+/// least-recently-active leaderboards. Pin-and-restore actions hit
+/// `hermes curator pin/unpin/restore` via CuratorViewModel.
 ///
 /// Capability-gated upstream: AppCoordinator only wires the sidebar
-/// item when `HermesCapabilities.hasCurator` is true. Archive surfaces
-/// gate independently on `hasCuratorArchive`; pre-v0.13 hosts see the
-/// v2.7.x layout unchanged (legacy `CuratorRestoreSheet` reachable from
-/// the overflow menu, no Archive section, fire-and-forget Run Now).
+/// item when `HermesCapabilities.hasCurator` is true. This view assumes
+/// it's reachable on a v0.12+ host.
 struct CuratorView: View {
     @State private var viewModel: CuratorViewModel
     @State private var showRestoreSheet = false
 
-    @Environment(\.hermesCapabilities) private var capabilitiesStore
-
     init(context: ServerContext) {
         _viewModel = State(initialValue: CuratorViewModel(context: context))
     }
 
-    /// Single source of truth for "v0.13 archive surface visible". Read
-    /// once in `body` and threaded into sub-views. Defensive default to
-    /// `false` so previews / smoke tests behave like a pre-v0.13 host.
-    private var archiveAvailable: Bool {
-        capabilitiesStore?.capabilities.hasCuratorArchive ?? false
-    }
-
     var body: some View {
         ScrollView {
             VStack(alignment: .leading, spacing: ScarfSpace.s4) {
                 ScarfPageHeader(
                     "Curator",
-                    subtitle: archiveAvailable
-                        ? "Autonomous skill maintenance — archive, prune, restore"
-                        : "Autonomous skill maintenance — Hermes v0.12+"
+                    subtitle: "Autonomous skill maintenance — Hermes v0.12+"
                 ) {
-                    headerActions
-                }
-
-                if let errorMessage = viewModel.errorMessage {
-                    errorBanner(errorMessage)
+                    HStack(spacing: ScarfSpace.s2) {
+                        if viewModel.isLoading {
+                            ProgressView().controlSize(.small)
+                        }
+                        Button("Run Now") {
+                            Task { await viewModel.runNow() }
+                        }
+                        .buttonStyle(ScarfPrimaryButton())
+                        .disabled(viewModel.isLoading)
+                        Menu {
+                            switch viewModel.status.state {
+                            case .paused:
+                                Button("Resume") { Task { await viewModel.resume() } }
+                            case .enabled:
+                                Button("Pause") { Task { await viewModel.pause() } }
+                            default:
+                                EmptyView()
+                            }
+                            Button("Restore Archived…") {
+                                showRestoreSheet = true
+                            }
+                            .disabled(viewModel.status.archivedSkills == 0)
+                        } label: {
+                            Image(systemName: "ellipsis.circle")
+                        }
+                    }
                 }
 
                 if let toast = viewModel.transientMessage {
@@ -59,19 +64,6 @@ struct CuratorView: View {
                 pinnedSection
                 activityTables
 
-                if archiveAvailable {
-                    CuratorArchivedSection(
-                        archived: viewModel.archivedSkills,
-                        isLoading: viewModel.isLoadingArchive,
-                        onRestore: { name in
-                            Task { await viewModel.restore(name) }
-                        },
-                        onPruneAll: {
-                            Task { await viewModel.planPrune() }
-                        }
-                    )
-                }
-
                 if let report = viewModel.lastReportMarkdown {
                     lastReportSection(markdown: report)
                 }
@@ -79,84 +71,10 @@ struct CuratorView: View {
             .padding(ScarfSpace.s4)
         }
         .background(ScarfColor.backgroundPrimary)
-        .task {
-            await viewModel.load()
-            if archiveAvailable {
-                await viewModel.loadArchive()
-            }
-        }
+        .task { await viewModel.load() }
         .sheet(isPresented: $showRestoreSheet) {
             CuratorRestoreSheet(viewModel: viewModel)
         }
-        .sheet(
-            isPresented: Binding(
-                get: { viewModel.pruneSummary != nil },
-                set: { isShown in
-                    if !isShown { viewModel.cancelPrune() }
-                }
-            )
-        ) {
-            if let summary = viewModel.pruneSummary {
-                CuratorPruneConfirmSheet(
-                    summary: summary,
-                    isPruning: viewModel.isPruning,
-                    onConfirm: {
-                        Task { await viewModel.confirmPrune() }
-                    },
-                    onCancel: {
-                        viewModel.cancelPrune()
-                    }
-                )
-            }
-        }
-    }
-
-    @ViewBuilder
-    private var headerActions: some View {
-        HStack(spacing: ScarfSpace.s2) {
-            if viewModel.isLoading {
-                ProgressView().controlSize(.small)
-            }
-            Button("Run Now") {
-                Task {
-                    await viewModel.runNow(
-                        synchronous: archiveAvailable,
-                        timeout: 600
-                    )
-                }
-            }
-            .buttonStyle(ScarfPrimaryButton())
-            .disabled(viewModel.isLoading)
-            .help(archiveAvailable
-                ? "Curator runs synchronously on Hermes v0.13+. Usually 10–90s."
-                : "Trigger a curator run. Returns immediately on pre-v0.13 hosts.")
-
-            Menu {
-                switch viewModel.status.state {
-                case .paused:
-                    Button("Resume") { Task { await viewModel.resume() } }
-                case .enabled:
-                    Button("Pause") { Task { await viewModel.pause() } }
-                default:
-                    EmptyView()
-                }
-
-                if archiveAvailable {
-                    Divider()
-                    Button("Prune Archived…", role: .destructive) {
-                        Task { await viewModel.planPrune() }
-                    }
-                    .disabled(viewModel.archivedSkills.isEmpty && !viewModel.isLoadingArchive)
-                } else {
-                    Button("Restore Archived…") {
-                        showRestoreSheet = true
-                    }
-                    .disabled(viewModel.status.archivedSkills == 0)
-                }
-            } label: {
-                Image(systemName: "ellipsis.circle")
-            }
-        }
     }
 
     private var statusSummary: some View {
@@ -288,10 +206,6 @@ struct CuratorView: View {
                         }
                         .buttonStyle(.plain)
                         .help(viewModel.status.pinnedNames.contains(row.name) ? "Pinned" : "Pin skill")
-
-                        if archiveAvailable {
-                            archiveButton(for: row.name)
-                        }
                     }
                     .padding(.vertical, 2)
                 }
@@ -299,25 +213,6 @@ struct CuratorView: View {
         }
     }
 
-    @ViewBuilder
-    private func archiveButton(for name: String) -> some View {
-        if viewModel.pendingArchiveName == name {
-            ProgressView()
-                .controlSize(.small)
-                .frame(width: 14, height: 14)
-        } else {
-            Button {
-                Task { await viewModel.archive(name) }
-            } label: {
-                Image(systemName: "archivebox")
-                    .font(.system(size: 12))
-            }
-            .buttonStyle(.plain)
-            .help("Archive (move out of active set)")
-            .disabled(viewModel.pendingArchiveName != nil)
-        }
-    }
-
     private func counterChip(label: String, value: Int) -> some View {
         Text("\(label) \(value)")
             .font(ScarfFont.monoSmall)
@@ -382,35 +277,6 @@ struct CuratorView: View {
         .background(ScarfColor.accentTint)
         .clipShape(RoundedRectangle(cornerRadius: ScarfRadius.md))
     }
-
-    /// Inline yellow banner for CLI failures. Non-blocking — sits above
-    /// the status summary and dismisses with the "x" so users can keep
-    /// interacting with the leaderboard. Mirrors the pattern in
-    /// KanbanBoardView.
-    private func errorBanner(_ message: String) -> some View {
-        HStack(alignment: .top, spacing: ScarfSpace.s2) {
-            Image(systemName: "exclamationmark.triangle.fill")
-                .foregroundStyle(ScarfColor.warning)
-            Text(message)
-                .scarfStyle(.caption)
-                .foregroundStyle(ScarfColor.foregroundPrimary)
-                .frame(maxWidth: .infinity, alignment: .leading)
-            Button {
-                viewModel.dismissError()
-            } label: {
-                Image(systemName: "xmark.circle.fill")
-                    .foregroundStyle(ScarfColor.foregroundMuted)
-            }
-            .buttonStyle(.plain)
-            .help("Dismiss")
-        }
-        .padding(.horizontal, ScarfSpace.s3)
-        .padding(.vertical, ScarfSpace.s2)
-        .background(
-            RoundedRectangle(cornerRadius: ScarfRadius.md)
-                .fill(ScarfColor.warning.opacity(0.12))
-        )
-    }
 }
 
 /// Simple `FlowLayout` for the pinned-skill chips. Custom layout

scarf/scarf/Features/Gateway/ViewModels/GatewayViewModel.swift

@@ -1,7 +1,13 @@
 import Foundation
 import ScarfCore
 
-struct GatewayInfo {
+// **Local rename for v0.13 / WS-5.** The user-facing label is "Messaging
+// Gateway"; the type names mirror that. The `SidebarSection.gateway` enum
+// case + `gateway_state.json` / `gateway.log` paths intentionally stay
+// unchanged — those aren't user-facing strings, and renaming them would
+// churn unrelated callers without changing what users see.
+
+struct MessagingGatewayInfo {
     let pid: Int?
     let state: String
     let exitReason: String?
@@ -37,32 +43,48 @@ struct PendingPairing: Identifiable {
 }
 
 @Observable
-final class GatewayViewModel {
+@MainActor
+final class MessagingGatewayViewModel {
     let context: ServerContext
+    /// Capability snapshot at view-init time. Read for the v0.13 cross-
+    /// profile digest (`hasGatewayList`); other v0.13 surfaces live on
+    /// per-platform setup views. `.empty` is fine outside the per-server
+    /// `ContextBoundRoot` (Previews, smoke tests).
+    let capabilities: HermesCapabilities
 
-    init(context: ServerContext = .local) {
+    init(context: ServerContext = .local, capabilities: HermesCapabilities = .empty) {
         self.context = context
+        self.capabilities = capabilities
     }
 
-    var gateway = GatewayInfo(pid: nil, state: "unknown", exitReason: nil, startTime: nil, updatedAt: nil, platforms: [], isLoaded: false, isStale: false)
+    var gateway = MessagingGatewayInfo(pid: nil, state: "unknown", exitReason: nil, startTime: nil, updatedAt: nil, platforms: [], isLoaded: false, isStale: false)
     var approvedUsers: [PairedUser] = []
     var pendingPairings: [PendingPairing] = []
     var isLoading = false
     var actionMessage: String?
+    /// `hermes gateway list --json` snapshot. `nil` when the verb fails
+    /// (pre-v0.13 host or no profiles registered yet) — the digest row
+    /// hides itself in that case.
+    var gatewayList: GatewayListSnapshot?
 
     func load() {
         isLoading = true
         let ctx = context
+        let caps = capabilities
         Task.detached { [weak self] in
             // Two sync transport calls + two CLI invocations — substantial
             // remote latency. Detach the whole load and commit at the end.
             let status = Self.fetchGatewayStatus(context: ctx)
             let pairing = Self.fetchPairing(context: ctx)
+            let listSnap = caps.hasGatewayList
+                ? HermesGatewayListService.fetch(context: ctx)
+                : nil
             await MainActor.run { [weak self] in
                 guard let self else { return }
                 self.gateway = status
                 self.approvedUsers = pairing.approved
                 self.pendingPairings = pairing.pending
+                self.gatewayList = listSnap
                 self.isLoading = false
             }
         }
@@ -70,7 +92,7 @@ final class GatewayViewModel {
 
     /// Static form of the gateway-status walk so the detached load can call
     /// it without bouncing back to MainActor.
-    nonisolated private static func fetchGatewayStatus(context: ServerContext) -> GatewayInfo {
+    nonisolated private static func fetchGatewayStatus(context: ServerContext) -> MessagingGatewayInfo {
         let stateJSON = context.readData(context.paths.gatewayStateJSON)
         var pid: Int?
         var state = "unknown"
@@ -102,7 +124,7 @@ final class GatewayViewModel {
         let isLoaded = statusOutput.contains("service is loaded")
         let isStale = statusOutput.contains("stale")
 
-        return GatewayInfo(
+        return MessagingGatewayInfo(
             pid: pid, state: state, exitReason: exitReason,
             startTime: startTime, updatedAt: updatedAt,
             platforms: platforms, isLoaded: isLoaded, isStale: isStale

scarf/scarf/Features/Gateway/Views/GatewayView.swift

@@ -2,12 +2,24 @@ import SwiftUI
 import ScarfCore
 import ScarfDesign
 
+/// Messaging Gateway page. Routes outbound chat to Discord / Telegram /
+/// Slack / etc. — distinct from the v0.10 **Tool Gateway** (Nous Portal
+/// subscription routing for web search / image / TTS / browser), which
+/// lives under `Features/Health/`. The user-facing label here is always
+/// "Messaging Gateway"; the SwiftUI struct stays `GatewayView` because
+/// `ContentView` references it by name (rename-on-touch invariant —
+/// avoid churning unrelated callers).
 struct GatewayView: View {
-    @State private var viewModel: GatewayViewModel
+    @State private var viewModel: MessagingGatewayViewModel
     @Environment(HermesFileWatcher.self) private var fileWatcher
+    @Environment(\.hermesCapabilities) private var capabilitiesStore
 
     init(context: ServerContext) {
-        _viewModel = State(initialValue: GatewayViewModel(context: context))
+        // Capabilities arrive via environment after init runs, so the VM
+        // is constructed with `.empty` and refreshed on first appear via
+        // `attach(capabilities:)`. Same pattern as the per-platform setup
+        // views — see `MessagingGatewayViewModel.capabilities` doc comment.
+        _viewModel = State(initialValue: MessagingGatewayViewModel(context: context))
     }
 
 
@@ -15,10 +27,15 @@ struct GatewayView: View {
         VStack(spacing: 0) {
             ScarfPageHeader(
                 "Messaging Gateway",
-                subtitle: "Outbound channel bridge — Discord, Telegram, Slack, etc."
+                subtitle: "Outbound channel bridge — Discord, Telegram, Slack, Google Chat, etc."
             )
             ScrollView {
-                VStack(alignment: .leading, spacing: 24) {
+                VStack(alignment: .leading, spacing: ScarfSpace.s4) {
+                    if let snap = viewModel.gatewayList,
+                       viewModel.capabilities.hasGatewayList,
+                       !snap.profiles.isEmpty {
+                        crossProfileDigest(snap)
+                    }
                     serviceSection
                     platformsSection
                     pairingSection
@@ -29,14 +46,58 @@ struct GatewayView: View {
         }
         .background(ScarfColor.backgroundPrimary)
         .navigationTitle("Messaging Gateway")
-        .onAppear { viewModel.load() }
+        .onAppear {
+            attachCapabilitiesIfNeeded()
+            viewModel.load()
+        }
         .onChange(of: fileWatcher.lastChangeDate) { viewModel.load() }
     }
 
+    /// Re-create the VM with the resolved capabilities the first time the
+    /// store hands us non-empty data. Same shape as `KanbanBoardView`'s
+    /// `attach` helper.
+    private func attachCapabilitiesIfNeeded() {
+        guard let store = capabilitiesStore,
+              store.capabilities.detected,
+              !viewModel.capabilities.detected else { return }
+        viewModel = MessagingGatewayViewModel(
+            context: viewModel.context,
+            capabilities: store.capabilities
+        )
+    }
+
+    // MARK: - v0.13 cross-profile digest
+
+    /// One-line summary above the gateway controls when the host is on
+    /// v0.13+ and `hermes gateway list --json` returned at least one
+    /// profile. Doubly-guarded — `hasGatewayList` AND `profiles != []`
+    /// — so a v0.13 host with no registered profiles doesn't render
+    /// an empty pill.
+    private func crossProfileDigest(_ snap: GatewayListSnapshot) -> some View {
+        HStack(spacing: ScarfSpace.s2) {
+            Image(systemName: "dot.radiowaves.left.and.right")
+                .foregroundStyle(ScarfColor.accent)
+            Text(snap.headerDigest)
+                .scarfStyle(.captionStrong)
+                .foregroundStyle(ScarfColor.foregroundPrimary)
+            Spacer()
+        }
+        .padding(.horizontal, ScarfSpace.s3)
+        .padding(.vertical, ScarfSpace.s2)
+        .background(
+            RoundedRectangle(cornerRadius: ScarfRadius.md, style: .continuous)
+                .fill(ScarfColor.backgroundSecondary)
+        )
+        .overlay(
+            RoundedRectangle(cornerRadius: ScarfRadius.md, style: .continuous)
+                .strokeBorder(ScarfColor.border, lineWidth: 1)
+        )
+    }
+
     // MARK: - Service
 
     private var serviceSection: some View {
-        VStack(alignment: .leading, spacing: 12) {
+        VStack(alignment: .leading, spacing: ScarfSpace.s3) {
             HStack {
                 Text("Service")
                     .font(.headline)
@@ -46,15 +107,20 @@ struct GatewayView: View {
                         .font(.caption)
                         .foregroundStyle(.secondary)
                 }
-                HStack(spacing: 8) {
+                HStack(spacing: ScarfSpace.s2) {
                     Button("Start") { viewModel.startGateway() }
+                        .buttonStyle(ScarfPrimaryButton())
+                        .controlSize(.small)
                     Button("Stop") { viewModel.stopGateway() }
+                        .buttonStyle(ScarfSecondaryButton())
+                        .controlSize(.small)
                     Button("Restart") { viewModel.restartGateway() }
+                        .buttonStyle(ScarfSecondaryButton())
+                        .controlSize(.small)
                 }
-                .controlSize(.small)
             }
 
-            HStack(spacing: 16) {
+            HStack(spacing: ScarfSpace.s3) {
                 StatusBadge(
                     label: viewModel.gateway.state,
                     isActive: viewModel.gateway.state == "running"
@@ -97,7 +163,7 @@ struct GatewayView: View {
     // MARK: - Platforms
 
     private var platformsSection: some View {
-        VStack(alignment: .leading, spacing: 8) {
+        VStack(alignment: .leading, spacing: ScarfSpace.s2) {
             Text("Platforms")
                 .font(.headline)
             if viewModel.gateway.platforms.isEmpty {
@@ -105,7 +171,7 @@ struct GatewayView: View {
                     .font(.caption)
                     .foregroundStyle(.secondary)
             } else {
-                HStack(spacing: 12) {
+                HStack(spacing: ScarfSpace.s3) {
                     ForEach(viewModel.gateway.platforms) { platform in
                         VStack(spacing: 6) {
                             Image(systemName: platform.icon)
@@ -119,9 +185,9 @@ struct GatewayView: View {
                             )
                         }
                         .frame(maxWidth: .infinity)
-                        .padding(12)
+                        .padding(ScarfSpace.s3)
                         .background(.quaternary.opacity(0.5))
-                        .clipShape(RoundedRectangle(cornerRadius: 8))
+                        .clipShape(RoundedRectangle(cornerRadius: ScarfRadius.md))
                     }
                 }
             }
@@ -131,12 +197,12 @@ struct GatewayView: View {
     // MARK: - Pairing
 
     private var pairingSection: some View {
-        VStack(alignment: .leading, spacing: 12) {
+        VStack(alignment: .leading, spacing: ScarfSpace.s3) {
             Text("Paired Users")
                 .font(.headline)
 
             if !viewModel.pendingPairings.isEmpty {
-                VStack(alignment: .leading, spacing: 8) {
+                VStack(alignment: .leading, spacing: ScarfSpace.s2) {
                     Label("Pending Approvals", systemImage: "clock.badge.questionmark")
                         .font(.caption.bold())
                         .foregroundStyle(.orange)
@@ -150,12 +216,12 @@ struct GatewayView: View {
                                 viewModel.approvePairing(platform: pending.platform, code: pending.code)
                             }
                             .controlSize(.small)
-                            .buttonStyle(.borderedProminent)
+                            .buttonStyle(ScarfPrimaryButton())
                         }
                         .font(.caption)
-                        .padding(8)
+                        .padding(ScarfSpace.s2)
                         .background(.orange.opacity(0.1))
-                        .clipShape(RoundedRectangle(cornerRadius: 6))
+                        .clipShape(RoundedRectangle(cornerRadius: ScarfRadius.sm))
                     }
                 }
             }
@@ -182,9 +248,9 @@ struct GatewayView: View {
                         }
                         .controlSize(.small)
                     }
-                    .padding(8)
+                    .padding(ScarfSpace.s2)
                     .background(.quaternary.opacity(0.3))
-                    .clipShape(RoundedRectangle(cornerRadius: 6))
+                    .clipShape(RoundedRectangle(cornerRadius: ScarfRadius.sm))
                 }
             }
         }

scarf/scarf/Features/Platforms/ViewModels/PlatformSetup/GatewayBehaviorViewModel.swift

@@ -0,0 +1,140 @@
+import Foundation
+import ScarfCore
+import os
+
+/// View-model for the v0.13 Messaging Gateway behavior subsection composed
+/// into each per-platform setup view. Owns the four v0.13 controls
+/// (allowlist + three behavior toggles) so the existing per-platform VMs
+/// don't grow another set of fields.
+///
+/// Capability-gated. Pre-v0.13 hosts skip the entire subsection (the
+/// owning view returns `EmptyView` when none of the v0.13 flags is on),
+/// so this VM never has its `save()` called against a host that can't
+/// honor it.
+@Observable
+@MainActor
+final class GatewayBehaviorViewModel {
+    private static let logger = Logger(subsystem: "com.scarf", category: "GatewayBehavior")
+
+    let platform: String
+    let context: ServerContext
+    let capabilities: HermesCapabilities
+    /// Allowlist kind for this platform, or `nil` for platforms without
+    /// an allowlist surface (Discord, Signal, etc. — `GatewayBehaviorSection`
+    /// short-circuits before instantiating this VM in that case, but the
+    /// field is `nil` for safety).
+    let kind: GatewayAllowlistKind?
+
+    // Allowlist
+    var items: [String] = []
+
+    // Behavior toggles
+    var busyAckEnabled: Bool = true
+    var gatewayRestartNotification: Bool = false
+    var slashCommandNoticeTTLSeconds: Int = 0
+
+    var message: String?
+    var isSaving: Bool = false
+
+    init(
+        platform: String,
+        capabilities: HermesCapabilities,
+        context: ServerContext = .local
+    ) {
+        self.platform = platform
+        self.capabilities = capabilities
+        self.context = context
+        self.kind = GatewayAllowlistKind.kind(for: platform)
+    }
+
+    /// Hydrate from `~/.hermes/config.yaml`. Called from the section's
+    /// `.onAppear`. Empty when the platform has no `gateway:` block in
+    /// the file — defaults match v0.13 server-side defaults so the form
+    /// looks identical to a fresh-install host.
+    func load() {
+        let cfg = HermesFileService(context: context).loadConfig()
+        let block = cfg.gatewayPlatforms[platform] ?? .empty
+        if let kind {
+            switch kind {
+            case .channels: items = block.allowedChannels
+            case .chats:    items = block.allowedChats
+            case .rooms:    items = block.allowedRooms
+            }
+        } else {
+            items = []
+        }
+        busyAckEnabled              = block.busyAckEnabled
+        gatewayRestartNotification  = block.gatewayRestartNotification
+        slashCommandNoticeTTLSeconds = block.slashCommandNoticeTTLSeconds
+    }
+
+    /// Persist edits in two phases:
+    ///
+    /// 1. **Allowlist write** via `GatewayConfigWriter.saveList` — direct
+    ///    YAML edit, since `hermes config set` can't write list values.
+    ///    Skipped when the platform has no `kind` (no allowlist surface)
+    ///    or the host doesn't advertise `hasGatewayAllowlists`.
+    /// 2. **Scalar saves** via `PlatformSetupHelpers.saveForm` for the
+    ///    three v0.13 behavior toggles. Each gated on its own capability
+    ///    flag; the TTL field rides on the `hasGatewayBusyAckToggle ‖
+    ///    hasGatewayRestartNotification` proxy (see WS-5 plan §Open Questions
+    ///    Q5 + WS-1 Decision F).
+    func save() {
+        isSaving = true
+        defer {
+            isSaving = false
+            DispatchQueue.main.asyncAfter(deadline: .now() + 3) { [weak self] in
+                self?.message = nil
+            }
+        }
+
+        // Step 1: list write via direct YAML edit. Detached so the SCP
+        // round-trip on remote hosts doesn't block MainActor — local
+        // writes are still cheap, but the same posture works for both.
+        if let kind, capabilities.hasGatewayAllowlists {
+            let trimmed = items
+                .map { $0.trimmingCharacters(in: .whitespaces) }
+                .filter { !$0.isEmpty }
+            let ok = GatewayConfigWriter.saveList(
+                context: context,
+                platform: platform,
+                key: kind.yamlKey,
+                items: trimmed
+            )
+            if !ok {
+                Self.logger.warning("GatewayConfigWriter.saveList failed for \(self.platform, privacy: .public)")
+                message = "Failed to write allowlist to config.yaml"
+                return
+            }
+        }
+
+        // Step 2: scalar saves via `hermes config set`.
+        var configKV: [String: String] = [:]
+        let prefix = "gateway.platforms.\(platform)."
+        if capabilities.hasGatewayBusyAckToggle {
+            configKV[prefix + "busy_ack_enabled"] =
+                PlatformSetupHelpers.envBool(busyAckEnabled)
+        }
+        if capabilities.hasGatewayRestartNotification {
+            configKV[prefix + "gateway_restart_notification"] =
+                PlatformSetupHelpers.envBool(gatewayRestartNotification)
+        }
+        // TTL field rides on either of the v0.13 toggles being available —
+        // proxy gating per WS-1 Decision F + WS-5 Q5. // TODO(WS-5-Q5)
+        if capabilities.hasGatewayBusyAckToggle
+            || capabilities.hasGatewayRestartNotification {
+            configKV[prefix + "slash_command_notice_ttl_seconds"] =
+                String(slashCommandNoticeTTLSeconds)
+        }
+
+        if configKV.isEmpty {
+            message = "Allowlist saved — restart gateway to apply"
+            return
+        }
+
+        let result = PlatformSetupHelpers.saveForm(
+            context: context, envPairs: [:], configKV: configKV
+        )
+        message = result
+    }
+}

scarf/scarf/Features/Platforms/Views/PlatformSetup/Components/AllowlistEditor.swift

@@ -0,0 +1,103 @@
+import SwiftUI
+import ScarfCore
+import ScarfDesign
+
+/// Reusable list-of-strings editor for v0.13 cross-platform allowlists.
+/// Shape: a vertical stack of rows, each with a delete glyph; an "Add row"
+/// button at the bottom appends an empty entry.
+///
+/// Stateless — binds to the parent VM's `items` array. The VM owns
+/// persistence and change tracking; this view is pure presentation.
+struct AllowlistEditor: View {
+    @Binding var items: [String]
+    let kind: GatewayAllowlistKind
+
+    var body: some View {
+        VStack(alignment: .leading, spacing: ScarfSpace.s2) {
+            HStack {
+                Text("Allowed \(kind.pluralNoun)")
+                    .scarfStyle(.caption)
+                    .foregroundStyle(ScarfColor.foregroundMuted)
+                Spacer()
+                Text(itemsCountLabel)
+                    .scarfStyle(.caption)
+                    .foregroundStyle(ScarfColor.foregroundFaint)
+            }
+
+            if items.isEmpty {
+                Text("No restrictions — agent responds in any \(kind.noun).")
+                    .scarfStyle(.caption)
+                    .foregroundStyle(ScarfColor.foregroundFaint)
+                    .padding(.vertical, ScarfSpace.s2)
+            } else {
+                VStack(spacing: 4) {
+                    ForEach(Array(items.enumerated()), id: \.offset) { idx, _ in
+                        AllowlistRow(
+                            value: Binding(
+                                get: { items[safe: idx] ?? "" },
+                                set: { newValue in
+                                    guard idx < items.count else { return }
+                                    items[idx] = newValue
+                                }
+                            ),
+                            placeholder: kind.inputPlaceholder,
+                            onDelete: {
+                                guard idx < items.count else { return }
+                                items.remove(at: idx)
+                            }
+                        )
+                    }
+                }
+            }
+
+            HStack {
+                Button {
+                    items.append("")
+                } label: {
+                    Label("Add \(kind.noun)", systemImage: "plus.circle")
+                        .font(.caption)
+                }
+                .buttonStyle(.borderless)
+                Spacer()
+            }
+        }
+        .padding(.horizontal, ScarfSpace.s3)
+        .padding(.vertical, ScarfSpace.s2)
+    }
+
+    private var itemsCountLabel: String {
+        let nonEmpty = items.filter { !$0.trimmingCharacters(in: .whitespaces).isEmpty }.count
+        if nonEmpty == 0 { return "0 \(kind.pluralNoun)" }
+        if nonEmpty == 1 { return "1 \(kind.noun)" }
+        return "\(nonEmpty) \(kind.pluralNoun)"
+    }
+}
+
+private struct AllowlistRow: View {
+    @Binding var value: String
+    let placeholder: String
+    let onDelete: () -> Void
+
+    var body: some View {
+        HStack(spacing: ScarfSpace.s2) {
+            TextField(placeholder, text: $value)
+                .textFieldStyle(.roundedBorder)
+                .font(ScarfFont.monoSmall)
+            Button {
+                onDelete()
+            } label: {
+                Image(systemName: "minus.circle.fill")
+                    .foregroundStyle(ScarfColor.danger)
+            }
+            .buttonStyle(.plain)
+            .help("Remove")
+        }
+    }
+}
+
+private extension Array {
+    subscript(safe index: Int) -> Element? {
+        guard index >= 0, index < count else { return nil }
+        return self[index]
+    }
+}

scarf/scarf/Features/Platforms/Views/PlatformSetup/Components/GatewayBehaviorSection.swift

@@ -0,0 +1,96 @@
+import SwiftUI
+import ScarfCore
+import ScarfDesign
+
+/// v0.13 Messaging Gateway behavior subsection composed into each per-
+/// platform setup view (Slack, Mattermost, Telegram, WhatsApp, Matrix,
+/// Google Chat). Owns its own `@State` view-model so the existing per-
+/// platform VMs don't grow another set of fields.
+///
+/// **Capability gating.** Hides itself entirely on pre-v0.13 hosts
+/// (returns `EmptyView` when none of the three v0.13 flags is on). Each
+/// internal control gates on its own flag, so a host that gains, say,
+/// `hasGatewayAllowlists` but not `hasGatewayBusyAckToggle` still gets
+/// the allowlist editor with the toggles hidden.
+struct GatewayBehaviorSection: View {
+    let platform: String
+    let capabilities: HermesCapabilities
+    let context: ServerContext
+
+    @State private var viewModel: GatewayBehaviorViewModel
+
+    init(platform: String, capabilities: HermesCapabilities, context: ServerContext) {
+        self.platform = platform
+        self.capabilities = capabilities
+        self.context = context
+        _viewModel = State(initialValue: GatewayBehaviorViewModel(
+            platform: platform,
+            capabilities: capabilities,
+            context: context
+        ))
+    }
+
+    var body: some View {
+        // Pre-v0.13 host — hide the entire subsection so the existing
+        // platform forms look unchanged. Critical regression invariant
+        // per WS-5 plan §"How to test" #1.
+        if !capabilities.hasGatewayAllowlists
+            && !capabilities.hasGatewayBusyAckToggle
+            && !capabilities.hasGatewayRestartNotification {
+            EmptyView()
+        } else {
+            content
+        }
+    }
+
+    private var content: some View {
+        VStack(alignment: .leading, spacing: ScarfSpace.s3) {
+            SettingsSection(title: "Gateway behavior (v0.13+)", icon: "dot.radiowaves.left.and.right") {
+                if capabilities.hasGatewayAllowlists,
+                   let kind = viewModel.kind {
+                    AllowlistEditor(
+                        items: $viewModel.items,
+                        kind: kind
+                    )
+                }
+                if capabilities.hasGatewayBusyAckToggle {
+                    ToggleRow(
+                        label: "Send 'Agent is working…' ack",
+                        isOn: viewModel.busyAckEnabled
+                    ) { viewModel.busyAckEnabled = $0 }
+                }
+                if capabilities.hasGatewayRestartNotification {
+                    ToggleRow(
+                        label: "Post 'Gateway restarted' notice on boot",
+                        isOn: viewModel.gatewayRestartNotification
+                    ) { viewModel.gatewayRestartNotification = $0 }
+                }
+                // TTL field rides on either v0.13 toggle being available
+                // — proxy gating per WS-1 Decision F. // TODO(WS-5-Q5)
+                if capabilities.hasGatewayBusyAckToggle
+                    || capabilities.hasGatewayRestartNotification {
+                    StepperRow(
+                        label: "Auto-delete slash-command notices (s)",
+                        value: viewModel.slashCommandNoticeTTLSeconds,
+                        range: 0...3600,
+                        step: 5
+                    ) { viewModel.slashCommandNoticeTTLSeconds = $0 }
+                }
+            }
+
+            HStack {
+                if let msg = viewModel.message {
+                    Label(msg, systemImage: "checkmark.circle.fill")
+                        .font(.caption)
+                        .foregroundStyle(.green)
+                }
+                Spacer()
+                Button("Save behavior") { viewModel.save() }
+                    .buttonStyle(ScarfPrimaryButton())
+                    .controlSize(.small)
+                    .disabled(viewModel.isSaving)
+            }
+        }
+        .onAppear { viewModel.load() }
+    }
+}

scarf/scarf/Features/Platforms/Views/PlatformSetup/MatrixSetupView.swift

@@ -4,7 +4,13 @@ import ScarfDesign
 
 struct MatrixSetupView: View {
     @State private var viewModel: MatrixSetupViewModel
-    init(context: ServerContext) { _viewModel = State(initialValue: MatrixSetupViewModel(context: context)) }
+    @Environment(\.hermesCapabilities) private var capabilitiesStore
+    let context: ServerContext
+
+    init(context: ServerContext) {
+        self.context = context
+        _viewModel = State(initialValue: MatrixSetupViewModel(context: context))
+    }
 
 
     var body: some View {
@@ -45,6 +51,13 @@ struct MatrixSetupView: View {
             }
 
             saveBar
+
+            // v0.13 Messaging Gateway behavior — self-hides on pre-v0.13.
+            GatewayBehaviorSection(
+                platform: "matrix",
+                capabilities: capabilitiesStore?.capabilities ?? .empty,
+                context: context
+            )
         }
         .onAppear { viewModel.load() }
     }

scarf/scarf/Features/Platforms/Views/PlatformSetup/MattermostSetupView.swift

@@ -4,7 +4,13 @@ import ScarfDesign
 
 struct MattermostSetupView: View {
     @State private var viewModel: MattermostSetupViewModel
-    init(context: ServerContext) { _viewModel = State(initialValue: MattermostSetupViewModel(context: context)) }
+    @Environment(\.hermesCapabilities) private var capabilitiesStore
+    let context: ServerContext
+
+    init(context: ServerContext) {
+        self.context = context
+        _viewModel = State(initialValue: MattermostSetupViewModel(context: context))
+    }
 
 
     var body: some View {
@@ -28,6 +34,13 @@ struct MattermostSetupView: View {
             }
 
             saveBar
+
+            // v0.13 Messaging Gateway behavior — self-hides on pre-v0.13.
+            GatewayBehaviorSection(
+                platform: "mattermost",
+                capabilities: capabilitiesStore?.capabilities ?? .empty,
+                context: context
+            )
         }
         .onAppear { viewModel.load() }
     }

scarf/scarf/Features/Platforms/Views/PlatformSetup/SlackSetupView.swift

@@ -4,7 +4,13 @@ import ScarfDesign
 
 struct SlackSetupView: View {
     @State private var viewModel: SlackSetupViewModel
-    init(context: ServerContext) { _viewModel = State(initialValue: SlackSetupViewModel(context: context)) }
+    @Environment(\.hermesCapabilities) private var capabilitiesStore
+    let context: ServerContext
+
+    init(context: ServerContext) {
+        self.context = context
+        _viewModel = State(initialValue: SlackSetupViewModel(context: context))
+    }
 
 
     var body: some View {
@@ -30,6 +36,13 @@ struct SlackSetupView: View {
             }
 
             saveBar
+
+            // v0.13 Messaging Gateway behavior — self-hides on pre-v0.13.
+            GatewayBehaviorSection(
+                platform: "slack",
+                capabilities: capabilitiesStore?.capabilities ?? .empty,
+                context: context
+            )
         }
         .onAppear { viewModel.load() }
     }

scarf/scarf/Features/Platforms/Views/PlatformSetup/TelegramSetupView.swift

@@ -4,7 +4,13 @@ import ScarfDesign
 
 struct TelegramSetupView: View {
     @State private var viewModel: TelegramSetupViewModel
-    init(context: ServerContext) { _viewModel = State(initialValue: TelegramSetupViewModel(context: context)) }
+    @Environment(\.hermesCapabilities) private var capabilitiesStore
+    let context: ServerContext
+
+    init(context: ServerContext) {
+        self.context = context
+        _viewModel = State(initialValue: TelegramSetupViewModel(context: context))
+    }
 
 
     var body: some View {
@@ -29,6 +35,13 @@ struct TelegramSetupView: View {
             }
 
             saveBar
+
+            // v0.13 Messaging Gateway behavior — self-hides on pre-v0.13.
+            GatewayBehaviorSection(
+                platform: "telegram",
+                capabilities: capabilitiesStore?.capabilities ?? .empty,
+                context: context
+            )
         }
         .onAppear { viewModel.load() }
     }

scarf/scarf/Features/Platforms/Views/PlatformSetup/WhatsAppSetupView.swift

@@ -4,7 +4,13 @@ import ScarfDesign
 
 struct WhatsAppSetupView: View {
     @State private var viewModel: WhatsAppSetupViewModel
-    init(context: ServerContext) { _viewModel = State(initialValue: WhatsAppSetupViewModel(context: context)) }
+    @Environment(\.hermesCapabilities) private var capabilitiesStore
+    let context: ServerContext
+
+    init(context: ServerContext) {
+        self.context = context
+        _viewModel = State(initialValue: WhatsAppSetupViewModel(context: context))
+    }
 
 
     var body: some View {
@@ -29,6 +35,14 @@ struct WhatsAppSetupView: View {
             }
 
             saveBar
+
+            // v0.13 Messaging Gateway behavior — self-hides on pre-v0.13.
+            GatewayBehaviorSection(
+                platform: "whatsapp",
+                capabilities: capabilitiesStore?.capabilities ?? .empty,
+                context: context
+            )
+
             Divider()
             pairingSection
         }

scarf/scarf/Features/Platforms/Views/PlatformsView.swift

@@ -5,6 +5,33 @@ import ScarfDesign
 struct PlatformsView: View {
     @State private var viewModel: PlatformsViewModel
     @Environment(HermesFileWatcher.self) private var fileWatcher
+    @Environment(\.hermesCapabilities) private var capabilitiesStore
+
+    /// Capabilities resolved at view-eval time. Defaults to `.empty` outside
+    /// the per-server `ContextBoundRoot`. Used to filter `KnownPlatforms.all`
+    /// for v0.13-only entries (Google Chat) — see `visiblePlatforms` for
+    /// the deliberate asymmetry: pre-v0.12 hosts still see Yuanbao + Teams
+    /// unfiltered, by design.
+    private var capabilities: HermesCapabilities {
+        capabilitiesStore?.capabilities ?? .empty
+    }
+
+    /// Capability-filtered platform list. Today only **Google Chat** is
+    /// gated — Yuanbao and Microsoft Teams stay unfiltered to avoid
+    /// changing v0.12 host UX in a v0.13 work-stream (WS-5 plan §Q4).
+    /// If we later decide to gate the v0.12 platforms too, add their
+    /// flags here; the `default: true` arm keeps every other platform
+    /// visible.
+    private var visiblePlatforms: [HermesToolPlatform] {
+        KnownPlatforms.all.filter { p in
+            switch p.name {
+            case "google-chat", "googlechat":
+                return capabilities.hasGoogleChatPlatform
+            default:
+                return true
+            }
+        }
+    }
 
     init(context: ServerContext) {
         _viewModel = State(initialValue: PlatformsViewModel(context: context))
@@ -40,12 +67,12 @@ struct PlatformsView: View {
             List(selection: Binding(
                 get: { viewModel.selected.name },
                 set: { name in
-                    if let p = viewModel.platforms.first(where: { $0.name == name }) {
+                    if let p = visiblePlatforms.first(where: { $0.name == name }) {
                         viewModel.selected = p
                     }
                 }
             )) {
-                ForEach(viewModel.platforms) { platform in
+                ForEach(visiblePlatforms) { platform in
                     HStack(spacing: 8) {
                         Image(systemName: KnownPlatforms.icon(for: platform.name))
                             .frame(width: 20)
@@ -149,6 +176,7 @@ struct PlatformsView: View {
         case "webhook":        WebhookSetupView(context: ctx)
         case "yuanbao":        yuanbaoPanel
         case "microsoft-teams": microsoftTeamsPanel
+        case "google-chat", "googlechat": googleChatPanel
         default:
             SettingsSection(title: LocalizedStringKey(viewModel.selected.displayName), icon: KnownPlatforms.icon(for: viewModel.selected.name)) {
                 ReadOnlyRow(label: "Setup", value: "No setup form for this platform yet.")
@@ -180,6 +208,27 @@ struct PlatformsView: View {
         }
     }
 
+    /// Hermes v0.13 — Google Chat is the 20th gateway platform. Like
+    /// Yuanbao + Microsoft Teams, the auth dance is OAuth-style and
+    /// lives outside Scarf, so the panel surfaces the setup verb rather
+    /// than a per-field form. The `GatewayBehaviorSection` below it picks
+    /// up the v0.13 allowlist + behavior toggles, capability-gated.
+    @ViewBuilder
+    private var googleChatPanel: some View {
+        VStack(alignment: .leading, spacing: ScarfSpace.s3) {
+            SettingsSection(title: "Google Chat", icon: KnownPlatforms.icon(for: "google-chat")) {
+                ReadOnlyRow(label: "Type", value: "Generic env-driven gateway adapter (v0.13+)")
+                ReadOnlyRow(label: "Setup", value: "Run `hermes setup` and select Google Chat to walk the OAuth flow.")
+                ReadOnlyRow(label: "Configured", value: viewModel.hasConfigBlock(for: viewModel.selected) ? "Yes" : "No")
+            }
+            GatewayBehaviorSection(
+                platform: "google-chat",
+                capabilities: capabilities,
+                context: viewModel.context
+            )
+        }
+    }
+
     private var cliPanel: some View {
         SettingsSection(title: "CLI", icon: "terminal") {
             ReadOnlyRow(label: "Scope", value: "Local terminal sessions")

scarf/scarf/Features/Skills/Views/SkillsView.swift

@@ -307,6 +307,16 @@ struct SkillsView: View {
                        case .missing(let hint) = designMdNpxStatus {
                         designMdNpxBanner(hint: hint)
                     }
+                    // v0.13 `[[as_document]]` directive — informational
+                    // only. Rendered when the skill body contains the
+                    // marker AND the host advertises Google Chat support
+                    // (cheap proxy: the directive shipped in v0.13
+                    // alongside Google Chat — see WS-5 plan §Q5/Q6).
+                    if (capabilitiesStore?.capabilities.hasGoogleChatPlatform ?? false),
+                       skillContentMentionsAsDocument {
+                        asDocumentInfoRow
+                    }
+
                     // v2.5 SKILL.md frontmatter chips. Render only the
                     // sections that are populated — old skills without
                     // this metadata show no extra rows.
@@ -402,6 +412,39 @@ struct SkillsView: View {
         }
     }
 
+    /// Returns true when the loaded skill body contains the v0.13
+    /// `[[as_document]]` directive. Substring scan over `skillContent`
+    /// — `[[as_document]]` is a literal token Hermes pattern-matches at
+    /// runtime, not a frontmatter key, so the body is the right place
+    /// to look. // TODO(WS-5-Q6): if Hermes ever moves the directive
+    /// into frontmatter, switch to `SkillFrontmatterParser` instead.
+    private var skillContentMentionsAsDocument: Bool {
+        viewModel.skillContent.contains("[[as_document]]")
+    }
+
+    /// Compact informational row about the `[[as_document]]` directive.
+    /// Does not block any action — it's a label so users understand why
+    /// images in the skill might land as document attachments on certain
+    /// platforms (Google Chat, Microsoft Teams) rather than inline.
+    private var asDocumentInfoRow: some View {
+        HStack(alignment: .top, spacing: 8) {
+            Image(systemName: "doc.badge.gearshape")
+                .foregroundStyle(.blue)
+            VStack(alignment: .leading, spacing: 2) {
+                Text("Document-attachment directive present (v0.13+)")
+                    .font(.caption.bold())
+                Text("Media in this skill marked with `[[as_document]]` is sent as document attachments instead of inline images on platforms that distinguish (Google Chat, Microsoft Teams).")
+                    .font(.caption)
+                    .foregroundStyle(.secondary)
+                    .fixedSize(horizontal: false, vertical: true)
+            }
+        }
+        .padding(10)
+        .frame(maxWidth: .infinity, alignment: .leading)
+        .background(.blue.opacity(0.08))
+        .clipShape(RoundedRectangle(cornerRadius: 8))
+    }
+
     /// Yellow banner surfaced on the design-md skill detail when the
     /// host's `npx` probe came back missing. Reuses the same color
     /// language as the missing-config banner.