feat(curator): archive + prune + list-archived (WS-4)

Catches the Curator surface up to Hermes v0.13's new write-side verbs
(`archive <skill>`, `prune`, `list-archived`, synchronous `run`). Adds
a new `CuratorService` actor in ScarfCore mirroring `KanbanService`'s
pattern (Sendable, pure I/O, `Task.detached(priority: .utility)` per
verb), tolerantly-decoded `HermesCuratorArchivedSkill` /
`CuratorPruneSummary` models, and `CuratorError` for inline-banner
surfacing.

Mac UX gains an "Archived" section between the leaderboards and the
last-report block (per-row Restore button), an "archivebox" button on
every active-skill leaderboard row to manually archive, a destructive
"Prune Archived…" confirm sheet enumerating each skill (template-
uninstall pattern — Cancel owns `.defaultAction`, Prune is on the red
`ScarfDestructiveButton`), and a synchronous-with-progress "Run Now"
on v0.13+ hosts (600s timeout, `ProgressView` while in-flight).
Failure path routes through a yellow inline error banner instead of a
modal alert. The legacy `CuratorRestoreSheet` stays accessible from
the overflow menu but only on pre-v0.13 hosts; on v0.13+ the per-row
Restore in the new Archived section replaces it.

All new surfaces gate on `HermesCapabilities.hasCuratorArchive` —
pre-v0.13 hosts see the v2.7.x layout unchanged. iOS picks up the new
`runNow(synchronous:)` signature with the v0.13 capability flag; the
read-only Archived section + WS-9 marker is left for the next stream.
14 new parser tests in `HermesCuratorParserTests` cover the JSON
happy path, the `{"archived": [...]}` envelope, the text fallback
(`--json` not supported), `"no archived skills"` sentinel folding,
prune-dry-run with both wrapper + bare-array shapes, and zero-skill
prune. All 369 ScarfCore tests pass; `xcodebuild` for the `scarf`
scheme succeeds.

Wire-shape unknowns (CLI flag presence on real v0.13) carry
`// TODO(WS-4-Q<N>)` markers in `CuratorService` and fall back
defensively when a flag isn't recognized. Implements WS-4 of Scarf
v2.8.0 (Hermes v0.13.0 catch-up). Plan:
scarf/docs/v2.8/WS-4-curator-archive-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

@@ -0,0 +1,34 @@
+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/HermesCuratorArchive.swift

@@ -0,0 +1,124 @@
+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/Services/CuratorService.swift

@@ -0,0 +1,358 @@
+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/ViewModels/CuratorViewModel.swift

@@ -4,17 +4,19 @@ import Observation
 import os
 #endif
 
-/// Mac + iOS view model for the v0.12 Curator surface.
+/// Mac + iOS view model for the Curator surface (v0.12 base + v0.13
+/// archive/prune additions).
 ///
 /// Drives `hermes curator status / run / pause / resume / pin / unpin /
-/// 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.
+/// 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.
 ///
 /// Capability-gated: callers should construct this only when
-/// `HermesCapabilities.hasCurator` is true. The view model does not
-/// gate itself — the gate happens at sidebar/tab routing time.
+/// `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.
 @Observable
 @MainActor
 public final class CuratorViewModel {
@@ -27,20 +29,50 @@ 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)
@@ -69,46 +101,156 @@ public final class CuratorViewModel {
         self.lastReportMarkdown = parsed.1
     }
 
-    public func runNow() async {
-        await runAndReload(args: ["curator", "run"], successMessage: "Curator run started")
+    /// 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 pause() async {
-        await runAndReload(args: ["curator", "pause"], successMessage: "Curator paused")
+        await runWithReload(verb: "pause", successMessage: "Curator paused") {
+            try await self.service.pause()
+        }
     }
 
     public func resume() async {
-        await runAndReload(args: ["curator", "resume"], successMessage: "Curator resumed")
+        await runWithReload(verb: "resume", successMessage: "Curator resumed") {
+            try await self.service.resume()
+        }
     }
 
     public func pin(_ skill: String) async {
-        await runAndReload(args: ["curator", "pin", skill], successMessage: "Pinned \(skill)")
+        await runWithReload(verb: "pin", successMessage: "Pinned \(skill)") {
+            try await self.service.pin(skill)
+        }
     }
 
     public func unpin(_ skill: String) async {
-        await runAndReload(args: ["curator", "unpin", skill], successMessage: "Unpinned \(skill)")
+        await runWithReload(verb: "unpin", successMessage: "Unpinned \(skill)") {
+            try await self.service.unpin(skill)
+        }
     }
 
     public func restore(_ skill: String) async {
-        await runAndReload(args: ["curator", "restore", skill], successMessage: "Restored \(skill)")
+        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()
     }
 
-    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"
+    // 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()
-        // Auto-clear toast after 3s.
+            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() {
         Task { @MainActor [weak self] in
             try? await Task.sleep(nanoseconds: 3_000_000_000)
             self?.transientMessage = nil
         }
     }
 
-    /// Wrap the transport-level `runProcess` so the call sites don't
-    /// have to reach for it directly. Combined stdout+stderr.
+    // MARK: - Legacy sync helpers (kept for `load`'s detached path)
+
     nonisolated private static func runHermes(
         context: ServerContext,
         args: [String]

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

@@ -151,4 +151,169 @@ 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/Scarf iOS/Curator/CuratorView.swift

@@ -13,11 +13,24 @@ 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 {
@@ -115,7 +128,7 @@ struct CuratorView: View {
     private var actionFooter: some View {
         HStack(spacing: 8) {
             Button {
-                Task { await viewModel.runNow() }
+                Task { await viewModel.runNow(synchronous: archiveAvailable, timeout: 600) }
             } label: {
                 Label("Run now", systemImage: "play.fill")
             }

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

@@ -0,0 +1,122 @@
+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

@@ -0,0 +1,123 @@
+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

@@ -2,18 +2,16 @@ import SwiftUI
 import ScarfCore
 import ScarfDesign
 
-/// 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.
+/// 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>`.
 ///
-/// 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.
+/// **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.
 struct CuratorRestoreSheet: View {
     let viewModel: CuratorViewModel
 

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

@@ -2,57 +2,52 @@ import SwiftUI
 import ScarfCore
 import ScarfDesign
 
-/// Mac UI for Hermes v0.12's autonomous skill curator.
+/// Mac UI for Hermes's autonomous skill curator (v0.12 base + v0.13
+/// archive/prune surface).
 ///
 /// Surfaces the running state (enabled / paused / disabled), last-run
-/// 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.
+/// 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.
 ///
 /// Capability-gated upstream: AppCoordinator only wires the sidebar
-/// item when `HermesCapabilities.hasCurator` is true. This view assumes
-/// it's reachable on a v0.12+ host.
+/// 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).
 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: "Autonomous skill maintenance — Hermes v0.12+"
+                    subtitle: archiveAvailable
+                        ? "Autonomous skill maintenance — archive, prune, restore"
+                        : "Autonomous skill maintenance — Hermes v0.12+"
                 ) {
-                    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")
-                        }
+                    headerActions
                 }
+
+                if let errorMessage = viewModel.errorMessage {
+                    errorBanner(errorMessage)
                 }
 
                 if let toast = viewModel.transientMessage {
@@ -64,6 +59,19 @@ 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)
                 }
@@ -71,10 +79,84 @@ struct CuratorView: View {
             .padding(ScarfSpace.s4)
         }
         .background(ScarfColor.backgroundPrimary)
-        .task { await viewModel.load() }
+        .task {
+            await viewModel.load()
+            if archiveAvailable {
+                await viewModel.loadArchive()
+            }
+        }
         .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 {
@@ -206,6 +288,10 @@ struct CuratorView: View {
                         }
                         .buttonStyle(.plain)
                         .help(viewModel.status.pinnedNames.contains(row.name) ? "Pinned" : "Pin skill")
+
+                        if archiveAvailable {
+                            archiveButton(for: row.name)
+                        }
                     }
                     .padding(.vertical, 2)
                 }
@@ -213,6 +299,25 @@ 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)
@@ -277,6 +382,35 @@ 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