diff --git a/Sources/OpenFreshrApp/AppViewModel.swift b/Sources/OpenFreshrApp/AppViewModel.swift
index f389e31..5758016 100644
--- a/Sources/OpenFreshrApp/AppViewModel.swift
+++ b/Sources/OpenFreshrApp/AppViewModel.swift
@@ -729,6 +729,56 @@ public final class AppViewModel {
         }
     }
 
+    /// Whether ``retryViaPnpm(_:)`` can be offered for `package`: it is
+    /// npm-tracked, and pnpm is actually available right now.
+    ///
+    /// Exists for a verified real-world case, not a hypothetical one: a
+    /// corporate npm registry was found to refuse `npm install`'s own fetch
+    /// for a package while `pnpm add` succeeded for the exact same package,
+    /// version and registry, every time. Deliberately npm-specific — this is
+    /// not a generic "try a different tool" button, only the one pairing this
+    /// was verified for.
+    public func canRetryViaPnpm(_ package: OutdatedPackage) -> Bool {
+        package.ecosystem == .npm && ecosystemCoordinator.isAvailable(.pnpm)
+    }
+
+    /// Retry `package` (an npm package whose own update just failed) via pnpm
+    /// instead. On a **confirmed** pnpm success — the coordinator's own
+    /// rescan, not pnpm's claim — the stale npm-tracked copy is removed
+    /// (best-effort; pnpm is already the source of truth for this package
+    /// regardless of whether that succeeds), so `npm outdated` stops
+    /// reporting a package that is verifiably current again, just through a
+    /// different tool.
+    public func retryViaPnpm(_ package: OutdatedPackage) async {
+        guard package.ecosystem == .npm else { return }
+        let key = package.id
+        guard !updateInFlight.contains(key) else { return }
+        updateInFlight.insert(key)
+        defer { updateInFlight.remove(key) }
+
+        let pnpmPackage = OutdatedPackage(
+            ecosystem: .pnpm, name: package.name, installed: package.installed,
+            available: package.available, isMajor: package.isMajor, description: package.description)
+
+        let ecosystems = self.ecosystemCoordinator
+        let results = await ecosystems.update([pnpmPackage])
+        guard let result = results.first else { return }
+
+        guard result.isVerified else {
+            updateOutcomes[key] =
+                result.stillOutdated == true
+                ? String(localized: "pnpm also reported success, but the package is still outdated.")
+                : (result.action.explanation ?? String(localized: "pnpm could not update this either."))
+            return
+        }
+
+        updateOutcomes[key] = Self.updatedMessage
+        _ = await Task.detached { ecosystems.uninstall(package) }.value
+        // Both ecosystems changed (npm lost a row, pnpm gained one); a full
+        // recheck reflects both rather than hand-patching two reports at once.
+        await checkForUpdates()
+    }
+
     /// The ecosystem's check with `package` removed when the update was verified,
     /// or unchanged otherwise — a light local patch so the row disappears at once
     /// instead of waiting for the next full ``checkForUpdates()``.
diff --git a/Sources/OpenFreshrApp/ContentView.swift b/Sources/OpenFreshrApp/ContentView.swift
index 9f5226c..2f16b00 100644
--- a/Sources/OpenFreshrApp/ContentView.swift
+++ b/Sources/OpenFreshrApp/ContentView.swift
@@ -298,17 +298,27 @@ private struct PackageRow: View {
             if isUpdating {
                 ProgressView().controlSize(.small)
                 Text("Updating …").foregroundStyle(.secondary)
-            } else if canAutomaticallyUpdate {
-                Button("Update") {
-                    Task { await viewModel.updatePackage(package) }
-                }
-                .buttonStyle(.borderedProminent)
-                .help("Install the new version of \(package.name)")
             } else {
-                Button("Open") {
-                    openWhereToUpdate()
+                HStack(spacing: 8) {
+                    if problem != nil, viewModel.canRetryViaPnpm(package) {
+                        Button("Try via pnpm") {
+                            Task { await viewModel.retryViaPnpm(package) }
+                        }
+                        .help("Retry updating \(package.name) through pnpm instead of npm")
+                    }
+                    if canAutomaticallyUpdate {
+                        Button("Update") {
+                            Task { await viewModel.updatePackage(package) }
+                        }
+                        .buttonStyle(.borderedProminent)
+                        .help("Install the new version of \(package.name)")
+                    } else {
+                        Button("Open") {
+                            openWhereToUpdate()
+                        }
+                        .help("Open where \(package.name) can be updated")
+                    }
                 }
-                .help("Open where \(package.name) can be updated")
             }
         }
         .padding(.vertical, 4)
diff --git a/Sources/OpenFreshrApp/Resources/Localizable.xcstrings b/Sources/OpenFreshrApp/Resources/Localizable.xcstrings
index 08e3691..e503bd3 100644
--- a/Sources/OpenFreshrApp/Resources/Localizable.xcstrings
+++ b/Sources/OpenFreshrApp/Resources/Localizable.xcstrings
@@ -2441,6 +2441,16 @@
         }
       }
     },
+    "Retry updating %@ through pnpm instead of npm" : {
+      "localizations" : {
+        "de" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "%@ stattdessen über pnpm statt npm aktualisieren"
+          }
+        }
+      }
+    },
     "Scanning …" : {
       "localizations" : {
         "de" : {
@@ -2981,6 +2991,16 @@
         }
       }
     },
+    "Try via pnpm" : {
+      "localizations" : {
+        "de" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Über pnpm versuchen"
+          }
+        }
+      }
+    },
     "Type" : {
       "localizations" : {
         "de" : {
@@ -3511,6 +3531,26 @@
         }
       }
     },
+    "pnpm also reported success, but the package is still outdated." : {
+      "localizations" : {
+        "de" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "pnpm hat ebenfalls Erfolg gemeldet, das Paket ist aber weiterhin veraltet."
+          }
+        }
+      }
+    },
+    "pnpm could not update this either." : {
+      "localizations" : {
+        "de" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "pnpm konnte dies ebenfalls nicht aktualisieren."
+          }
+        }
+      }
+    },
     "recognized" : {
       "localizations" : {
         "de" : {
diff --git a/Sources/OpenFreshrCore/Ecosystem/Ecosystem.swift b/Sources/OpenFreshrCore/Ecosystem/Ecosystem.swift
index 1f17c60..4f323ee 100644
--- a/Sources/OpenFreshrCore/Ecosystem/Ecosystem.swift
+++ b/Sources/OpenFreshrCore/Ecosystem/Ecosystem.swift
@@ -124,6 +124,28 @@ public protocol EcosystemUpdating: Sendable {
     func update(_ package: OutdatedPackage) -> BackendActionResult
 }
 
+/// An ``EcosystemUpdating`` that can additionally **remove** a package it
+/// manages. Only meaningful where removing a stale tracked copy is itself
+/// safe and well-understood (`npm uninstall`) — not every ecosystem needs
+/// this, so it is a separate capability, mirroring ``UninstallingBackend``'s
+/// relationship to ``PackageBackend``.
+///
+/// Exists for exactly one purpose today: after ``PnpmEcosystem`` rescues an
+/// npm package a corporate registry refuses to let `npm` itself fetch (see
+/// ``AppViewModel/retryViaPnpm(_:)``), the stale npm-tracked copy is removed
+/// so `npm outdated` stops reporting a package that is verifiably current
+/// again, just through a different tool.
+public protocol EcosystemUninstalling: EcosystemUpdating {
+
+    /// The exact command that would remove `package`, or `nil` when the tool
+    /// is missing or the name fails validation.
+    func resolveUninstallCommand(for package: OutdatedPackage) -> ResolvedCommand?
+
+    /// Remove `package`. A reported success is only a claim, like every other
+    /// action here.
+    func uninstall(_ package: OutdatedPackage) -> BackendActionResult
+}
+
 /// One ecosystem's check, paired with the ecosystem it belongs to.
 public struct EcosystemReport: Hashable, Sendable, Identifiable {
     public var kind: EcosystemKind
@@ -191,6 +213,28 @@ public struct EcosystemCoordinator: Sendable {
         return ecosystem.resolveUpdateCommand(for: package) != nil
     }
 
+    /// Whether `kind`'s ecosystem is configured here and its tool is present
+    /// right now — checked fresh (a cheap file-exists probe, no process
+    /// spawn), not read from a stale cached report.
+    public func isAvailable(_ kind: EcosystemKind) -> Bool {
+        ecosystems.first(where: { $0.kind == kind })?.isAvailable() ?? false
+    }
+
+    /// Remove `package` via its own ecosystem, when that ecosystem supports
+    /// removal (see ``EcosystemUninstalling``). `.failed(.toolUnavailable)`
+    /// when the ecosystem is not configured, or does not support removal at
+    /// all — a reported success is only a claim, exactly like every other
+    /// action here.
+    public func uninstall(_ package: OutdatedPackage) -> BackendActionResult {
+        guard
+            let ecosystem = ecosystems.first(where: { $0.kind == package.ecosystem })
+                as? any EcosystemUninstalling
+        else {
+            return .failed(reason: .toolUnavailable(tool: package.ecosystem.label))
+        }
+        return ecosystem.uninstall(package)
+    }
+
     /// Updates the given packages one after another, then checks each affected
     /// ecosystem again so a reported success is confirmed rather than trusted.
     public func update(_ packages: [OutdatedPackage]) async -> [PackageUpdateResult] {
diff --git a/Sources/OpenFreshrCore/Ecosystem/NpmEcosystem.swift b/Sources/OpenFreshrCore/Ecosystem/NpmEcosystem.swift
index 74bbf45..ea282d5 100644
--- a/Sources/OpenFreshrCore/Ecosystem/NpmEcosystem.swift
+++ b/Sources/OpenFreshrCore/Ecosystem/NpmEcosystem.swift
@@ -8,7 +8,7 @@ import Foundation
 /// built with) puts `npm` somewhere else, and this ecosystem reports
 /// ``EcosystemCheck/unavailable`` rather than guess a path. A caller who knows the
 /// real path can pass it in `candidateNpmPaths`.
-public struct NpmEcosystem: EcosystemUpdating {
+public struct NpmEcosystem: EcosystemUninstalling {
 
     public let kind: EcosystemKind = .npm
 
@@ -92,6 +92,41 @@ public struct NpmEcosystem: EcosystemUpdating {
         }
     }
 
+    /// The exact `npm uninstall --global -- <name>` command, or `nil` when the
+    /// tool is missing or the name fails validation. Verified directly:
+    /// `npm uninstall` accepts a `--` separator the same way `install` does.
+    public func resolveUninstallCommand(for package: OutdatedPackage) -> ResolvedCommand? {
+        guard package.ecosystem == .npm, Self.isValidPackageName(package.name), let npm = npmURL() else {
+            return nil
+        }
+        return ResolvedCommand(
+            executablePath: npm.path,
+            arguments: ["uninstall", "--global", "--", package.name]
+        )
+    }
+
+    /// Remove the globally installed npm package `package`. Exists for
+    /// ``AppViewModel/retryViaPnpm(_:)``: once pnpm has confirmed it can
+    /// manage a package npm itself could not fetch, the stale npm-tracked
+    /// copy is removed so `npm outdated` stops reporting it.
+    public func uninstall(_ package: OutdatedPackage) -> BackendActionResult {
+        guard package.ecosystem == .npm, Self.isValidPackageName(package.name) else {
+            return .failed(reason: .invalidIdentifier(package.name))
+        }
+        guard let command = resolveUninstallCommand(for: package) else {
+            return .failed(reason: .toolUnavailable(tool: "npm"))
+        }
+        do {
+            let result = try processRunner.run(
+                executableURL: URL(fileURLWithPath: command.executablePath), arguments: command.arguments)
+            if result.didSucceed { return .succeeded(standardOutput: result.standardOutput) }
+            return .failed(
+                reason: .processFailed(exitCode: result.exitCode, standardError: result.standardError))
+        } catch {
+            return .failed(reason: .launchFailed(message: error.localizedDescription))
+        }
+    }
+
     // MARK: - Parsing and validation
 
     private struct Entry: Decodable {
diff --git a/Tests/OpenFreshrCoreTests/EcosystemTests.swift b/Tests/OpenFreshrCoreTests/EcosystemTests.swift
index caacba4..faf6e93 100644
--- a/Tests/OpenFreshrCoreTests/EcosystemTests.swift
+++ b/Tests/OpenFreshrCoreTests/EcosystemTests.swift
@@ -49,6 +49,37 @@ private func package(_ name: String, _ kind: EcosystemKind = .npm) -> OutdatedPa
     OutdatedPackage(ecosystem: kind, name: name, installed: "1.0.0", available: "1.1.0", isMajor: false)
 }
 
+/// Same programmed-answers shape as ``FakeEcosystem``, but additionally
+/// conforming to ``EcosystemUninstalling``, so ``EcosystemCoordinator/uninstall(_:)``
+/// can be exercised against an ecosystem that actually supports removal.
+private final class FakeUninstallingEcosystem: EcosystemUninstalling, @unchecked Sendable {
+    let kind: EcosystemKind
+    private let lock = NSLock()
+    private(set) var uninstallCalls: [String] = []
+    private let uninstallResult: BackendActionResult
+
+    init(kind: EcosystemKind, uninstallResult: BackendActionResult = .succeeded(standardOutput: "")) {
+        self.kind = kind
+        self.uninstallResult = uninstallResult
+    }
+
+    func isAvailable() -> Bool { true }
+    func check() -> EcosystemCheck { .upToDate }
+    func resolveUpdateCommand(for package: OutdatedPackage) -> ResolvedCommand? { nil }
+    func update(_ package: OutdatedPackage) -> BackendActionResult { .succeeded(standardOutput: "") }
+
+    func resolveUninstallCommand(for package: OutdatedPackage) -> ResolvedCommand? {
+        ResolvedCommand(executablePath: "/fake", arguments: ["uninstall", package.name])
+    }
+
+    func uninstall(_ package: OutdatedPackage) -> BackendActionResult {
+        lock.lock()
+        defer { lock.unlock() }
+        uninstallCalls.append(package.name)
+        return uninstallResult
+    }
+}
+
 @Suite("EcosystemCoordinator")
 struct EcosystemCoordinatorTests {
 
@@ -109,6 +140,40 @@ struct EcosystemCoordinatorTests {
         let results = await coordinator.update([package("a")])
         #expect(!results[0].action.didReportSuccess)
     }
+
+    @Test("isAvailable reflects the configured ecosystem's own answer, and false when not configured at all")
+    func isAvailableReflectsTheEcosystem() {
+        let coordinator = EcosystemCoordinator(ecosystems: [
+            FakeEcosystem(kind: .npm, available: true),
+            FakeEcosystem(kind: .pnpm, available: false),
+        ])
+        #expect(coordinator.isAvailable(.npm))
+        #expect(!coordinator.isAvailable(.pnpm))
+        #expect(!coordinator.isAvailable(.pipx))
+    }
+
+    @Test("uninstall routes to an ecosystem that supports removal")
+    func uninstallRoutesToASupportingEcosystem() {
+        let uninstaller = FakeUninstallingEcosystem(kind: .npm)
+        let coordinator = EcosystemCoordinator(ecosystems: [uninstaller])
+        let result = coordinator.uninstall(package("corepack"))
+        #expect(result.didReportSuccess)
+        #expect(uninstaller.uninstallCalls == ["corepack"])
+    }
+
+    @Test("uninstall fails without running anything when the ecosystem cannot remove packages")
+    func uninstallFailsForANonUninstallingEcosystem() {
+        let coordinator = EcosystemCoordinator(ecosystems: [FakeEcosystem(kind: .npm)])
+        let result = coordinator.uninstall(package("corepack"))
+        #expect(!result.didReportSuccess)
+    }
+
+    @Test("uninstall fails when the ecosystem is not configured at all")
+    func uninstallFailsForAnUnconfiguredEcosystem() {
+        let coordinator = EcosystemCoordinator(ecosystems: [])
+        let result = coordinator.uninstall(package("corepack"))
+        #expect(!result.didReportSuccess)
+    }
 }
 
 @Suite("HomebrewFormulaEcosystem")
@@ -351,6 +416,46 @@ struct NpmEcosystemTests {
         }
         #expect(runner.invocations.isEmpty)
     }
+
+    // MARK: - Uninstall (the pnpm-fallback cleanup step)
+
+    @Test("The uninstall command removes exactly the one named package, with a -- separator, verified directly")
+    func uninstallCommand() {
+        let (ecosystem, runner) = ecosystem { _, _ in ProcessResult(exitCode: 0, standardOutput: "", standardError: "")
+        }
+        let plain = OutdatedPackage(
+            ecosystem: .npm, name: "corepack", installed: "0.34.6", available: "0.36.0", isMajor: false)
+        #expect(
+            ecosystem.resolveUninstallCommand(for: plain)?.arguments
+                == ["uninstall", "--global", "--", "corepack"])
+
+        let result = ecosystem.uninstall(plain)
+        #expect(result.didReportSuccess)
+        #expect(runner.invocations.last?.arguments == ["uninstall", "--global", "--", "corepack"])
+    }
+
+    @Test("A hostile name is refused before any uninstall process runs")
+    func uninstallRejectsHostileNames() {
+        let (ecosystem, runner) = ecosystem { _, _ in ProcessResult(exitCode: 0, standardOutput: "", standardError: "")
+        }
+        let hostile = OutdatedPackage(
+            ecosystem: .npm, name: "-g", installed: "1", available: "2", isMajor: false)
+        #expect(ecosystem.resolveUninstallCommand(for: hostile) == nil)
+        #expect(!ecosystem.uninstall(hostile).didReportSuccess)
+        #expect(runner.invocations.isEmpty)
+    }
+
+    @Test("Without npm the uninstall command is nil and nothing runs")
+    func uninstallFailsCleanlyWithoutNpm() {
+        let (ecosystem, runner) = ecosystem(npmInstalled: false) { _, _ in
+            ProcessResult(exitCode: 0, standardOutput: "", standardError: "")
+        }
+        let plain = OutdatedPackage(
+            ecosystem: .npm, name: "corepack", installed: "1", available: "2", isMajor: false)
+        #expect(ecosystem.resolveUninstallCommand(for: plain) == nil)
+        #expect(!ecosystem.uninstall(plain).didReportSuccess)
+        #expect(runner.invocations.isEmpty)
+    }
 }
 
 /// Verified directly against real `pnpm 10.33.3` (see ``PnpmEcosystem``'s doc