diff --git a/src/app/components/signal-board/signal-board.css b/src/app/components/signal-board/signal-board.css
index b0d2bd2..9441de0 100644
--- a/src/app/components/signal-board/signal-board.css
+++ b/src/app/components/signal-board/signal-board.css
@@ -167,14 +167,16 @@
   pointer-events: none;
 }
 
-.jira-comment-section {
+.jira-comment-section,
+.github-comment-section {
   display: flex;
   gap: 0.5rem;
   width: 100%;
   margin-bottom: 0.75rem;
 }
 
-.jira-comment-section input {
+.jira-comment-section input,
+.github-comment-section input {
   flex: 1;
   border: 1px solid #cbd5e1;
   border-radius: 999px;
@@ -184,7 +186,8 @@
   transition: border-color 0.2s;
 }
 
-.jira-comment-section input:focus {
+.jira-comment-section input:focus,
+.github-comment-section input:focus {
   border-color: #6366f1;
 }
 
@@ -194,6 +197,17 @@
   flex-wrap: wrap;
 }
 
+/* Badge variants */
+.badge.success {
+  background: #dcfce7;
+  color: #15803d;
+}
+
+.badge.danger {
+  background: #fee2e2;
+  color: #b91c1c;
+}
+
 /* Toast */
 .toast-container {
   position: fixed;
diff --git a/src/app/components/signal-board/signal-board.html b/src/app/components/signal-board/signal-board.html
index 37fff06..c041f58 100644
--- a/src/app/components/signal-board/signal-board.html
+++ b/src/app/components/signal-board/signal-board.html
@@ -26,7 +26,11 @@ <h3>{{ signal.title }}</h3>
     <p class="signal-body">{{ signal.content }}</p>
 
     <div class="signal-badges">
-      <span class="badge neutral" *ngIf="signal.sourceType === 'github'">{{ signal.metadata.state }}</span>
+      <span class="badge" 
+            [ngClass]="signal.metadata.state === 'open' ? 'success' : 'danger'"
+            *ngIf="signal.sourceType === 'github'">
+        {{ signal.metadata.state }}
+      </span>
       <span class="badge neutral" *ngIf="signal.sourceType === 'slack'">#{{ getSlackChannel(signal) }}</span>
       <span class="badge neutral" *ngIf="signal.sourceType === 'jira'">{{ signal.metadata.issueType }}</span>
       <span class="badge neutral" *ngIf="signal.sourceType === 'jira' && signal.metadata.priority">{{ signal.metadata.priority }}</span>
@@ -46,8 +50,16 @@ <h3>{{ signal.title }}</h3>
         <button type="button" class="ghost-btn" [disabled]="submittingComment[signal.id] || !jiraComments[signal.id]" (click)="addJiraComment(signal)">Comment</button>
       </div>
 
+      <div class="github-comment-section" *ngIf="signal.sourceType === 'github'">
+        <input type="text" placeholder="Reply on GitHub..." [(ngModel)]="githubComments[signal.id]" [disabled]="submittingGitHubComment[signal.id]">
+        <button type="button" class="ghost-btn" [disabled]="submittingGitHubComment[signal.id] || !githubComments[signal.id]" (click)="addGitHubComment(signal)">Comment</button>
+      </div>
+
       <div class="action-buttons-group">
         <a class="link-btn" *ngIf="signal.url" [href]="signal.url" target="_blank" rel="noreferrer">{{ getOpenLabel(signal) }}</a>
+        <button type="button" class="ghost-btn" *ngIf="signal.sourceType === 'github'" (click)="toggleGitHubState(signal)">
+          {{ signal.metadata.state === 'open' ? 'Close Issue' : 'Reopen' }}
+        </button>
         <button type="button" class="ghost-btn" (click)="markAsRead.emit(signal.id)">Mark as read</button>
         <button type="button" class="ghost-btn" (click)="archive.emit(signal.id)">Archive</button>
       </div>
diff --git a/src/app/components/signal-board/signal-board.ts b/src/app/components/signal-board/signal-board.ts
index 1dfa39d..7dc7441 100644
--- a/src/app/components/signal-board/signal-board.ts
+++ b/src/app/components/signal-board/signal-board.ts
@@ -23,6 +23,8 @@ export class SignalBoardComponent {
   loadingTransitions: { [signalId: string]: boolean } = {};
   jiraComments: { [signalId: string]: string } = {};
   submittingComment: { [signalId: string]: boolean } = {};
+  githubComments: { [signalId: string]: string } = {};
+  submittingGitHubComment: { [signalId: string]: boolean } = {};
   toastMessage = '';
 
   trackBySignal(_: number, signal: Signal): string {
@@ -148,4 +150,52 @@ export class SignalBoardComponent {
       this.cdr.detectChanges();
     }, 4000);
   }
+
+  addGitHubComment(signal: Signal) {
+    const workspaceId = String(signal.workspaceId ?? '');
+    const repo = signal.metadata.repository;
+    const number = signal.metadata.number;
+    const comment = this.githubComments[signal.id];
+
+    if (!comment || !comment.trim() || !repo || !number) return;
+
+    this.submittingGitHubComment[signal.id] = true;
+    this.integrationService.addGitHubComment(workspaceId, repo, number, comment).subscribe({
+      next: () => {
+        this.showToast('Comment added to GitHub');
+        this.githubComments[signal.id] = '';
+        this.submittingGitHubComment[signal.id] = false;
+        this.cdr.detectChanges();
+      },
+      error: () => {
+        this.showToast('Failed to add GitHub comment');
+        this.submittingGitHubComment[signal.id] = false;
+        this.cdr.detectChanges();
+      }
+    });
+  }
+
+  toggleGitHubState(signal: Signal) {
+    const workspaceId = String(signal.workspaceId ?? '');
+    const repo = signal.metadata.repository;
+    const number = signal.metadata.number;
+    const currentState = signal.metadata.state;
+
+    if (!repo || !number) return;
+
+    const newState = currentState === 'open' ? 'closed' : 'open';
+
+    this.integrationService.updateGitHubIssueState(workspaceId, repo, number, newState).subscribe({
+      next: () => {
+        this.showToast(`Issue ${newState === 'closed' ? 'closed' : 'reopened'}`);
+        if (signal.metadata) {
+          signal.metadata.state = newState;
+        }
+        this.cdr.detectChanges();
+      },
+      error: () => {
+        this.showToast('Failed to update GitHub status');
+      }
+    });
+  }
 }
diff --git a/src/app/components/workspace-integrations/workspace-integrations.ts b/src/app/components/workspace-integrations/workspace-integrations.ts
index 5c2b98d..1cd37ab 100644
--- a/src/app/components/workspace-integrations/workspace-integrations.ts
+++ b/src/app/components/workspace-integrations/workspace-integrations.ts
@@ -1,6 +1,6 @@
 import { CommonModule } from '@angular/common';
 import { Component, OnInit, OnDestroy, inject } from '@angular/core';
-import { ActivatedRoute, RouterLink } from '@angular/router';
+import { ActivatedRoute } from '@angular/router';
 import { IntegrationService } from '../../services/integration.service';
 import { GitHubRepo, SyncStatus } from '../../models/github-integration.model';
 import { SlackChannel } from '../../models/slack-integration.model';
@@ -9,7 +9,7 @@ import { AtlassianResource, JiraSyncStatus } from '../../models/jira-integration
 @Component({
   selector: 'app-workspace-integrations',
   standalone: true,
-  imports: [CommonModule, RouterLink],
+  imports: [CommonModule],
   templateUrl: './workspace-integrations.html',
   styleUrl: './workspace-integrations.css'
 })
@@ -108,7 +108,7 @@ export class WorkspaceIntegrationsComponent implements OnInit, OnDestroy {
   connectGitHub(): void {
     this.githubErrorMessage = '';
     this.githubFeedbackMessage = 'Starting GitHub connection...';
-    this.integrationService.connectGitHub().subscribe({
+    this.integrationService.connectGitHub(this.workspaceId).subscribe({
       error: (error: Error) => {
         this.githubErrorMessage = error.message;
         this.githubFeedbackMessage = '';
@@ -117,7 +117,7 @@ export class WorkspaceIntegrationsComponent implements OnInit, OnDestroy {
   }
 
   disconnectGitHub(): void {
-    this.integrationService.disconnectGitHub().subscribe(() => {
+    this.integrationService.disconnectGitHub(this.workspaceId).subscribe(() => {
       this.githubSyncStatus = undefined;
       this.githubFeedbackMessage = 'GitHub integration disconnected.';
       this.loadRepos();
@@ -189,7 +189,7 @@ export class WorkspaceIntegrationsComponent implements OnInit, OnDestroy {
   saveRepoSelection(): void {
     this.isGitHubSaving = true;
     this.githubErrorMessage = '';
-    this.integrationService.updateGitHubRepos(this.selectedRepoIds).subscribe({
+    this.integrationService.updateGitHubRepos(this.workspaceId, this.selectedRepoIds).subscribe({
       next: () => {
         this.isGitHubSaving = false;
         this.githubFeedbackMessage = 'Repository selection saved.';
@@ -205,7 +205,7 @@ export class WorkspaceIntegrationsComponent implements OnInit, OnDestroy {
   syncNow(): void {
     this.isSyncing = true;
     this.githubErrorMessage = '';
-    this.integrationService.syncGitHub().subscribe({
+    this.integrationService.syncGitHub(this.workspaceId).subscribe({
       next: (status) => {
         this.githubSyncStatus = status;
         this.isSyncing = false;
@@ -260,7 +260,7 @@ export class WorkspaceIntegrationsComponent implements OnInit, OnDestroy {
   }
 
   private loadRepos(): void {
-    this.integrationService.getGitHubRepos().subscribe(response => {
+    this.integrationService.getGitHubRepos(this.workspaceId).subscribe(response => {
       this.isGitHubConnected = response.connected;
       this.repos = response.repos;
       this.selectedRepoIds = response.repos.filter(repo => repo.isConnected).map(repo => repo.id);
diff --git a/src/app/components/workspace-members/workspace-members.ts b/src/app/components/workspace-members/workspace-members.ts
index 9d758ba..fb1ec57 100644
--- a/src/app/components/workspace-members/workspace-members.ts
+++ b/src/app/components/workspace-members/workspace-members.ts
@@ -1,14 +1,14 @@
 import { CommonModule } from '@angular/common';
 import { Component, OnInit, inject } from '@angular/core';
 import { FormsModule } from '@angular/forms';
-import { ActivatedRoute, RouterLink } from '@angular/router';
+import { ActivatedRoute } from '@angular/router';
 import { Invitation, InvitationRole, WorkspaceMember, WorkspaceRole } from '../../models/workspace-member.model';
 import { WorkspaceMemberService } from '../../services/workspace-member.service';
 
 @Component({
   selector: 'app-workspace-members',
   standalone: true,
-  imports: [CommonModule, FormsModule, RouterLink],
+  imports: [CommonModule, FormsModule],
   templateUrl: './workspace-members.html',
   styleUrl: './workspace-members.css'
 })
diff --git a/src/app/services/integration.service.ts b/src/app/services/integration.service.ts
index 17cbd8a..923ce6d 100644
--- a/src/app/services/integration.service.ts
+++ b/src/app/services/integration.service.ts
@@ -114,23 +114,24 @@ export class IntegrationService {
     );
   }
 
-  getGitHubAuthUrl(): Observable<{ authUrl: string }> {
-    return this.http.get<OAuthResponse>(`${this.apiUrl}/github/auth`).pipe(
+  getGitHubAuthUrl(workspaceId: string): Observable<{ authUrl: string }> {
+    const params = new HttpParams().set('workspace_id', workspaceId);
+    return this.http.get<OAuthResponse>(`${this.apiUrl}/github/auth`, { params }).pipe(
       map((response) => ({ authUrl: response.auth_url })),
       catchError((error) => throwError(() => toError(error, 'Unable to start GitHub connection.'))),
     );
   }
 
-  connectGitHub(): Observable<void> {
-    return this.getGitHubAuthUrl().pipe(
+  connectGitHub(workspaceId: string): Observable<void> {
+    return this.getGitHubAuthUrl(workspaceId).pipe(
       map(({ authUrl }) => {
         window.open(authUrl, '_blank');
       }),
     );
   }
 
-  getGitHubRepos(): Observable<GitHubConnectionState> {
-    return this.getIntegrations().pipe(
+  getGitHubRepos(workspaceId: string): Observable<GitHubConnectionState> {
+    return this.getIntegrations(workspaceId).pipe(
       switchMap((integrations) => {
         const githubIntegration = integrations.find((integration) => integration.provider === 'github');
         if (!githubIntegration) {
@@ -142,8 +143,9 @@ export class IntegrationService {
 
         const metadata = this.parseMetadata(githubIntegration.metadata);
         const selectedRepoIds = this.readNumberArray(metadata['selected_repo_ids']);
+        const params = new HttpParams().set('workspace_id', workspaceId);
 
-        return this.http.get<GitHubRepoResponse[]>(`${this.apiUrl}/github/repos`).pipe(
+        return this.http.get<GitHubRepoResponse[]>(`${this.apiUrl}/github/repos`, { params }).pipe(
           map((repos) => ({
             connected: true,
             repos: repos.map((repo) => this.mapGitHubRepo(repo, selectedRepoIds)),
@@ -157,20 +159,23 @@ export class IntegrationService {
     );
   }
 
-  updateGitHubRepos(repoIds: number[]): Observable<void> {
-    return this.http.patch<void>(`${this.apiUrl}/github/repos`, { repo_ids: repoIds }).pipe(
+  updateGitHubRepos(workspaceId: string, repoIds: number[]): Observable<void> {
+    const params = new HttpParams().set('workspace_id', workspaceId);
+    return this.http.patch<void>(`${this.apiUrl}/github/repos`, { repo_ids: repoIds }, { params }).pipe(
       catchError((error) => throwError(() => toError(error, 'Unable to save repository selection.'))),
     );
   }
 
-  disconnectGitHub(): Observable<void> {
-    return this.http.delete<void>(`${this.apiUrl}/github`).pipe(
+  disconnectGitHub(workspaceId: string): Observable<void> {
+    const params = new HttpParams().set('workspace_id', workspaceId);
+    return this.http.delete<void>(`${this.apiUrl}/github`, { params }).pipe(
       catchError((error) => throwError(() => toError(error, 'Unable to disconnect GitHub.'))),
     );
   }
 
-  syncGitHub(): Observable<SyncStatus> {
-    return this.http.post<GitHubSyncResponse>(`${this.apiUrl}/github/sync`, {}).pipe(
+  syncGitHub(workspaceId: string): Observable<SyncStatus> {
+    const params = new HttpParams().set('workspace_id', workspaceId);
+    return this.http.post<GitHubSyncResponse>(`${this.apiUrl}/github/sync`, {}, { params }).pipe(
       map((response) => {
         const status: SyncStatus['status'] = response.status === 'sync_started' ? 'in_progress' : 'failed';
         return {
@@ -182,6 +187,20 @@ export class IntegrationService {
     );
   }
 
+  addGitHubComment(workspaceId: string, repo: string, number: number, comment: string): Observable<void> {
+    const params = new HttpParams().set('workspace_id', workspaceId);
+    return this.http.post<void>(`${this.apiUrl}/github/issues/${number}/comments`, { repo, body: comment }, { params }).pipe(
+      catchError((error) => throwError(() => toError(error, 'Unable to add GitHub comment.'))),
+    );
+  }
+
+  updateGitHubIssueState(workspaceId: string, repo: string, number: number, state: string): Observable<void> {
+    const params = new HttpParams().set('workspace_id', workspaceId);
+    return this.http.patch<void>(`${this.apiUrl}/github/issues/${number}/state`, { repo, state }, { params }).pipe(
+      catchError((error) => throwError(() => toError(error, 'Unable to update GitHub issue status.'))),
+    );
+  }
+
   getJiraAuthUrl(workspaceId: string): Observable<{ authUrl: string }> {
     const params = new HttpParams().set('workspace_id', workspaceId);
     return this.http.get<OAuthResponse>(`${this.apiUrl}/jira/auth`, { params }).pipe(