diff --git a/app/assets/stylesheets/solid_stack_web/_09_detail.css b/app/assets/stylesheets/solid_stack_web/_09_detail.css
index e897dda..dda42a3 100644
--- a/app/assets/stylesheets/solid_stack_web/_09_detail.css
+++ b/app/assets/stylesheets/solid_stack_web/_09_detail.css
@@ -68,4 +68,18 @@
   word-break: break-word;
   max-height: 400px;
   overflow-y: auto;
+}
+
+.sqw-code-input {
+  font-family: ui-monospace, "SFMono-Regular", Menlo, monospace;
+  font-size: 12px;
+  background: var(--bg);
+  border: 1px solid var(--border);
+  border-radius: var(--radius);
+  padding: 0.75rem;
+  width: 100%;
+  resize: vertical;
+  color: var(--text);
+  line-height: 1.5;
+  box-sizing: border-box;
 }
\ No newline at end of file
diff --git a/app/controllers/solid_stack_web/failed_jobs/arguments_controller.rb b/app/controllers/solid_stack_web/failed_jobs/arguments_controller.rb
new file mode 100644
index 0000000..56d0851
--- /dev/null
+++ b/app/controllers/solid_stack_web/failed_jobs/arguments_controller.rb
@@ -0,0 +1,17 @@
+module SolidStackWeb
+  module FailedJobs
+    class ArgumentsController < ApplicationController
+      def update
+        @execution = SolidQueue::FailedExecution.includes(:job).find(params[:failed_job_id])
+        new_arguments = JSON.parse(params[:arguments])
+        @execution.job.update!(arguments: new_arguments)
+        @execution.retry
+        redirect_to failed_jobs_path, notice: "Arguments updated and job queued for retry."
+      rescue JSON::ParserError
+        redirect_to failed_job_path(@execution), alert: "Invalid JSON — arguments were not saved."
+      rescue => e
+        redirect_to failed_jobs_path, alert: "Could not update job: #{e.message}"
+      end
+    end
+  end
+end
diff --git a/app/controllers/solid_stack_web/failed_jobs_controller.rb b/app/controllers/solid_stack_web/failed_jobs_controller.rb
index 1982a86..36d7015 100644
--- a/app/controllers/solid_stack_web/failed_jobs_controller.rb
+++ b/app/controllers/solid_stack_web/failed_jobs_controller.rb
@@ -14,6 +14,13 @@ def index
       end
     end
 
+    def show
+      @execution = ::SolidQueue::FailedExecution.includes(:job).find(params[:id])
+      @arguments = JSON.pretty_generate(@execution.job.arguments) if @execution.job.arguments.present?
+    rescue JSON::GeneratorError
+      @arguments = @execution.job.arguments.to_s
+    end
+
     def destroy
       @execution = ::SolidQueue::FailedExecution.find(params[:id])
       @execution.job.destroy!
diff --git a/app/views/solid_stack_web/failed_jobs/index.html.erb b/app/views/solid_stack_web/failed_jobs/index.html.erb
index 2b77d0e..74bbbd4 100644
--- a/app/views/solid_stack_web/failed_jobs/index.html.erb
+++ b/app/views/solid_stack_web/failed_jobs/index.html.erb
@@ -47,7 +47,7 @@
                          aria-label="Select <%= execution.job.class_name %>"
                          data-selection-target="checkbox"
                          data-action="change->selection#toggle"></td>
-              <td class="sqw-monospace"><%= execution.job.class_name %></td>
+              <td class="sqw-monospace"><%= link_to execution.job.class_name, failed_job_path(execution) %></td>
               <td><span class="sqw-badge sqw-badge--queue"><%= execution.job.queue_name %></span></td>
               <td class="sqw-muted sqw-truncate" title="<%= execution.exception_class %>: <%= execution.message %>"><%= execution.exception_class %></td>
               <td class="sqw-muted"><%= execution.created_at.strftime("%b %d %H:%M") %></td>
diff --git a/app/views/solid_stack_web/failed_jobs/show.html.erb b/app/views/solid_stack_web/failed_jobs/show.html.erb
new file mode 100644
index 0000000..744925b
--- /dev/null
+++ b/app/views/solid_stack_web/failed_jobs/show.html.erb
@@ -0,0 +1,58 @@
+<div class="sqw-page-header sqw-page-header--split">
+  <div>
+    <div class="sqw-breadcrumb">
+      <%= link_to "Failed Jobs", failed_jobs_path %> &rsaquo; Detail
+    </div>
+    <h1 class="sqw-page-title sqw-monospace"><%= @execution.job.class_name %></h1>
+  </div>
+
+  <div class="sqw-detail-actions">
+    <%= button_to "Retry", retry_failed_job_path(@execution),
+          method: :post, class: "sqw-btn sqw-btn--sm" %>
+    <%= button_to "Discard", failed_job_path(@execution),
+          method: :delete, class: "sqw-btn sqw-btn--danger",
+          data: { turbo_confirm: "Discard this job?" } %>
+  </div>
+</div>
+
+<div class="sqw-detail-grid">
+  <div class="sqw-detail-card sqw-detail-section">
+    <h2 class="sqw-section-title">Details</h2>
+    <dl class="sqw-dl">
+      <dt>Queue</dt>
+      <dd class="sqw-monospace"><%= @execution.job.queue_name %></dd>
+
+      <dt>Priority</dt>
+      <dd><%= @execution.job.priority %></dd>
+
+      <dt>Active Job ID</dt>
+      <dd class="sqw-monospace sqw-truncate" title="<%= @execution.job.active_job_id %>"><%= @execution.job.active_job_id.presence || "—" %></dd>
+
+      <dt>Failed At</dt>
+      <dd class="sqw-monospace"><%= @execution.created_at.strftime("%Y-%m-%d %H:%M:%S UTC") %></dd>
+
+      <dt>Error</dt>
+      <dd class="sqw-monospace"><%= @execution.exception_class %></dd>
+
+      <dt>Message</dt>
+      <dd class="sqw-muted"><%= @execution.message %></dd>
+    </dl>
+  </div>
+
+  <div class="sqw-detail-card sqw-detail-section">
+    <h2 class="sqw-section-title">Backtrace</h2>
+    <pre class="sqw-code-block"><%= Array(@execution.backtrace).first(10).join("\n").presence || "—" %></pre>
+  </div>
+</div>
+
+<div class="sqw-detail-card sqw-detail-section" style="margin-top: 1.5rem;">
+  <h2 class="sqw-section-title">Arguments</h2>
+  <%= form_with url: failed_job_arguments_path(@execution), method: :patch do |f| %>
+    <%= f.text_area :arguments, value: @arguments, rows: 12,
+          class: "sqw-code-input", aria: { label: "Job arguments JSON" },
+          spellcheck: false %>
+    <div style="margin-top: 0.75rem;">
+      <%= f.submit "Update &amp; Retry".html_safe, class: "sqw-btn sqw-btn--sm" %>
+    </div>
+  <% end %>
+</div>
\ No newline at end of file
diff --git a/config/routes.rb b/config/routes.rb
index 7317639..66336fb 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -10,8 +10,9 @@
     end
   end
 
-  resources :failed_jobs, only: [:index, :destroy] do
+  resources :failed_jobs, only: [:index, :show, :destroy] do
     member { post :retry }
+    resource :arguments, only: [:update], controller: "failed_jobs/arguments"
   end
 
   resources :queues, only: [:index] do
diff --git a/spec/requests/solid_stack_web/failed_job_selections_spec.rb b/spec/requests/solid_stack_web/failed_job_selections_spec.rb
index d82da7e..bd66c05 100644
--- a/spec/requests/solid_stack_web/failed_job_selections_spec.rb
+++ b/spec/requests/solid_stack_web/failed_job_selections_spec.rb
@@ -19,6 +19,17 @@ def create_failed(class_name: "FailingJob", queue_name: "default")
   end
 
   describe "POST /failed_jobs/selection (bulk retry)" do
+    it "redirects with alert when retry raises" do
+      execution = create_failed
+      allow_any_instance_of(SolidQueue::FailedExecution).to receive(:retry).and_raise(RuntimeError, "db error")
+
+      post "#{engine_root}/failed_jobs/selection",
+           params: { job_ids: [execution.id] }
+
+      expect(response).to redirect_to("#{engine_root}/failed_jobs")
+      expect(flash[:alert]).to eq("Could not retry jobs: db error")
+    end
+
     it "retries only the selected jobs" do
       exec_a = create_failed(class_name: "JobA")
       exec_b = create_failed(class_name: "JobB")
@@ -59,6 +70,17 @@ def create_failed(class_name: "FailingJob", queue_name: "default")
   end
 
   describe "DELETE /failed_jobs/selection (bulk discard)" do
+    it "redirects with alert when discard raises" do
+      execution = create_failed
+      allow(SolidQueue::Job).to receive(:where).and_raise(RuntimeError, "db error")
+
+      delete "#{engine_root}/failed_jobs/selection",
+             params: { job_ids: [execution.id] }
+
+      expect(response).to redirect_to("#{engine_root}/failed_jobs")
+      expect(flash[:alert]).to eq("Could not discard jobs: db error")
+    end
+
     it "discards only the selected jobs" do
       exec_a = create_failed(class_name: "JobA")
       exec_b = create_failed(class_name: "JobB")
diff --git a/spec/requests/solid_stack_web/failed_jobs_spec.rb b/spec/requests/solid_stack_web/failed_jobs_spec.rb
index 9aa3f5e..8b6fa1a 100644
--- a/spec/requests/solid_stack_web/failed_jobs_spec.rb
+++ b/spec/requests/solid_stack_web/failed_jobs_spec.rb
@@ -106,6 +106,86 @@ def create_failed(class_name: "FailingJob", queue_name: "default")
     end
   end
 
+  describe "GET /failed_jobs/:id" do
+    it "returns 200 and shows the job class" do
+      execution = create_failed(class_name: "BrokenJob")
+      get "#{engine_root}/failed_jobs/#{execution.id}"
+      expect(response).to have_http_status(:ok)
+      expect(response.body).to include("BrokenJob")
+    end
+
+    it "shows the error class and message" do
+      execution = create_failed
+      get "#{engine_root}/failed_jobs/#{execution.id}"
+      expect(response.body).to include("RuntimeError")
+      expect(response.body).to include("something went wrong")
+    end
+
+    it "shows a breadcrumb back to failed jobs" do
+      execution = create_failed
+      get "#{engine_root}/failed_jobs/#{execution.id}"
+      expect(response.body).to include("sqw-breadcrumb")
+      expect(response.body).to include("Failed Jobs")
+    end
+
+    it "renders the argument editor form" do
+      execution = create_failed
+      get "#{engine_root}/failed_jobs/#{execution.id}"
+      expect(response.body).to include("sqw-code-input")
+      expect(response.body).to include("Update")
+    end
+
+    it "shows Retry and Discard buttons" do
+      execution = create_failed
+      get "#{engine_root}/failed_jobs/#{execution.id}"
+      expect(response.body).to include("Retry")
+      expect(response.body).to include("Discard")
+    end
+
+    it "falls back to raw arguments string when JSON generation fails" do
+      execution = create_failed
+      allow(JSON).to receive(:pretty_generate).and_raise(JSON::GeneratorError, "NaN")
+
+      get "#{engine_root}/failed_jobs/#{execution.id}"
+
+      expect(response).to have_http_status(:ok)
+    end
+  end
+
+  describe "PATCH /failed_jobs/:id/arguments" do
+    it "updates arguments and retries the job" do
+      execution = create_failed
+      new_args = { "executions" => 0, "exception_executions" => {}, "user_id" => 99 }.to_json
+
+      patch "#{engine_root}/failed_jobs/#{execution.id}/arguments",
+            params: { arguments: new_args }
+
+      expect(SolidQueue::FailedExecution.exists?(execution.id)).to be false
+      expect(response).to redirect_to("#{engine_root}/failed_jobs")
+    end
+
+    it "redirects back with alert on invalid JSON" do
+      execution = create_failed
+
+      patch "#{engine_root}/failed_jobs/#{execution.id}/arguments",
+            params: { arguments: "not valid json {{" }
+
+      expect(SolidQueue::FailedExecution.exists?(execution.id)).to be true
+      expect(response).to redirect_to("#{engine_root}/failed_jobs/#{execution.id}")
+    end
+
+    it "redirects with alert when update raises" do
+      execution = create_failed
+      allow_any_instance_of(SolidQueue::Job).to receive(:update!).and_raise(RuntimeError, "db error")
+
+      patch "#{engine_root}/failed_jobs/#{execution.id}/arguments",
+            params: { arguments: { "executions" => 0, "exception_executions" => {} }.to_json }
+
+      expect(response).to redirect_to("#{engine_root}/failed_jobs")
+      expect(flash[:alert]).to eq("Could not update job: db error")
+    end
+  end
+
   describe "POST /failed_jobs/:id/retry" do
     it "re-enqueues the job and redirects" do
       execution = create_failed
diff --git a/spec/requests/solid_stack_web/jobs_spec.rb b/spec/requests/solid_stack_web/jobs_spec.rb
index 294b44e..e5f52a0 100644
--- a/spec/requests/solid_stack_web/jobs_spec.rb
+++ b/spec/requests/solid_stack_web/jobs_spec.rb
@@ -298,6 +298,12 @@ def create_ready(class_name: "MyJob", queue_name: "default", priority: 0)
 
       expect(response).to redirect_to("#{engine_root}/jobs?status=claimed")
     end
+
+    it "sets an alert when status is not discardable" do
+      delete "#{engine_root}/jobs/selection", params: { status: "claimed" }
+
+      expect(flash[:alert]).to eq("Cannot discard claimed jobs.")
+    end
   end
 
   describe "POST /jobs/discard_all" do