diff --git a/src/index.ts b/src/index.ts
index 1d19e851..ae5c425a 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -23,6 +23,7 @@ import { Auth, state, setState, resetState, primeFromEnv, systemArgs, normalizeP
 import { Pull } from "./core/pull";
 import { Push } from "./core/push";
 import { WorkflowOperation } from "./lib/workflows";
+import { MappingsHealth } from "./lib/mappers/mappings-health";
 
 import { initializeLogger, getLogger, finalizeLogger, finalizeAllGuidLoggers } from "./core/state";
 
@@ -42,6 +43,7 @@ yargs.command({
     console.log(colors.white("  pull              - Pull your Agility instance locally"));
     console.log(colors.white("  push              - Push your instance to a target instance"));
     console.log(colors.white("  sync              - Sync your instance (alias for push with updates enabled)"));
+    console.log(colors.white("  mappings-health   - Check your mappings to make sure they are valid."));
     console.log(colors.white("  workflowOperation - Perform workflow operations (publish, unpublish, approve, decline)"));
     console.log(colors.white("\nFor more information, use: --help"));
     console.log("");
@@ -308,6 +310,87 @@ yargs.command({
   }
 })
 
+// Mappings health check command - analyzes the health of mappings between two instances
+yargs.command({
+  command: "mappings-health",
+  describe: "Analyze the health of content item mappings between two instances.",
+  builder: {
+    sourceGuid: {
+      describe: "Source instance GUID.",
+      demandOption: true,
+      type: "string",
+    },
+    targetGuid: {
+      describe: "Target instance GUID.",
+      demandOption: true,
+      type: "string",
+    },
+    ...systemArgs
+  },
+  handler: async function (argv) {
+    resetState();
+    argv = normalizeArgv(argv);
+
+    const envPriming = primeFromEnv();
+    if (envPriming.hasEnvFile && envPriming.primedValues.length > 0) {
+      console.log(colors.cyan(`📄 Found .env file, primed: ${envPriming.primedValues.join(', ')}`));
+    }
+
+    setState(argv);
+    state.update = true;
+    // Skip assets and galleries — not needed for mappings health analysis
+    state.elements = 'Models,Containers,Content,Templates,Sitemaps';
+
+    auth = new Auth();
+    const isAuthorized = await auth.init();
+    if (!isAuthorized) return;
+
+    const isValidCommand = await auth.validateCommand('push');
+    if (!isValidCommand) return;
+
+    initializeLogger("pull");
+
+    const sourceGuid = state.sourceGuid[0];
+    const targetGuid = state.targetGuid[0];
+
+    console.log(colors.cyan(`\n📥 Pulling latest data for ${sourceGuid} and ${targetGuid} (skipping assets)...`));
+    const pull = new Pull();
+    // fromPush=true pulls both sourceGuid and targetGuid, and does not call process.exit()
+    const pullResult = await pull.pullInstances(true);
+
+    if (!pullResult.success) {
+      console.log(colors.yellow("\n⚠️  Pull completed with some errors. Proceeding with health check using available data..."));
+    }
+
+    console.log(colors.cyan(`\n🔍 Analyzing mappings health for ${sourceGuid} → ${targetGuid}...`));
+
+    const healthChecker = new MappingsHealth(sourceGuid, targetGuid);
+    const result = await healthChecker.analyze();
+
+    // Summary
+    console.log(colors.cyan(`\n${'─'.repeat(60)}`));
+    console.log(colors.cyan(`📊 Mappings Health Summary`));
+    console.log(colors.cyan(`${'─'.repeat(60)}`));
+    console.log(`  Source GUID         : ${result.sourceGuid}`);
+    console.log(`  Target GUID         : ${result.targetGuid}`);
+    console.log(`  Locales checked     : ${result.localesChecked.join(', ') || 'none'}`);
+    console.log(`  Item mappings found : ${result.totalItemMappingsChecked}`);
+    if (result.skippedNotOnDisk > 0) {
+      console.log(colors.yellow(`  Skipped (not on disk): ${result.skippedNotOnDisk}  (draft or deleted content — not checked)`));
+    }
+    console.log(`  Issues detected     : ${result.issues.length}`);
+
+    if (result.isHealthy) {
+      console.log(colors.green(`\n✅ All mappings are healthy!`));
+    } else {
+      console.log(colors.red(`\n❌ ${result.issues.length} issue(s) detected in mappings.`));
+      process.exitCode = 1;
+    }
+
+    finalizeLogger();
+  }
+});
+
 // Normalize process.argv to handle rich text editor character conversions
 // (e.g., em dashes, curly quotes from Word/Notepad)
 normalizeProcessArgs();
diff --git a/src/lib/mappers/mappings-health.ts b/src/lib/mappers/mappings-health.ts
new file mode 100644
index 00000000..bdac5302
--- /dev/null
+++ b/src/lib/mappers/mappings-health.ts
@@ -0,0 +1,208 @@
+import * as path from 'path';
+import * as fs from 'fs';
+import colors from 'ansi-colors';
+import * as mgmtApi from '@agility/management-sdk';
+import { state, getApiClient } from '../../core/state';
+import { fileOperations } from '../../core';
+import { ContainerMapper } from './container-mapper';
+
+export interface MappingHealthIssue {
+    type: 'containers_not_mapped' | 'duplicate_container_mapping' | 'missing_container_mapping';
+    locale: string;
+    sourceContentID: number;
+    targetContentID: number;
+    sourceReferenceName: string;
+    targetReferenceName: string;
+    message: string;
+    sourceItem?: any;
+    targetItem?: any;
+}
+
+export interface MappingsHealthResult {
+    sourceGuid: string;
+    targetGuid: string;
+    localesChecked: string[];
+    totalItemMappingsChecked: number;
+    skippedNotOnDisk: number;
+    issues: MappingHealthIssue[];
+    isHealthy: boolean;
+}
+
+export class MappingsHealth {
+    private sourceGuid: string;
+    private targetGuid: string;
+    private apiFetchCount = 0;
+
+    constructor(sourceGuid: string, targetGuid: string) {
+        this.sourceGuid = sourceGuid;
+        this.targetGuid = targetGuid;
+    }
+
+    async analyze(): Promise<MappingsHealthResult> {
+        const result: MappingsHealthResult = {
+            sourceGuid: this.sourceGuid,
+            targetGuid: this.targetGuid,
+            localesChecked: [],
+            totalItemMappingsChecked: 0,
+            skippedNotOnDisk: 0,
+            issues: [],
+            isHealthy: true
+        };
+
+        const locales = this.findMappingLocales();
+
+        if (locales.length === 0) {
+            const mappingsDir = path.join(state.rootPath, 'mappings', `${this.sourceGuid}-${this.targetGuid}`);
+            console.log(colors.yellow(`\n⚠️  No locale mapping directories found for ${this.sourceGuid} → ${this.targetGuid}`));
+            console.log(colors.yellow(`   Expected path: ${mappingsDir}`));
+            return result;
+        }
+
+        const containerMapper = new ContainerMapper(this.sourceGuid, this.targetGuid);
+
+        // Load raw container mappings to check for duplicates
+        const containerFileOps = new fileOperations(this.targetGuid);
+        const rawContainerMappings = containerFileOps.getMappingFile('containers', this.sourceGuid, this.targetGuid);
+
+        for (const locale of locales) {
+            result.localesChecked.push(locale);
+
+            const localeFileOps = new fileOperations(this.targetGuid, locale);
+            const itemMappings = localeFileOps.getMappingFile('item', this.sourceGuid, this.targetGuid, locale);
+
+            this.apiFetchCount = 0;
+            console.log(colors.cyan(`\n📋 Checking ${itemMappings.length} item mapping(s) for locale: ${locale}`));
+
+            for (let i = 0; i < itemMappings.length; i++) {
+                const mapping = itemMappings[i];
+                result.totalItemMappingsChecked++;
+
+                process.stdout.write(
+                    colors.gray(`  [${i + 1}/${itemMappings.length}] checking ${mapping.sourceContentID} → ${mapping.targetContentID} ...                \r`)
+                );
+
+                const sourceItem = await this.getContentItem(mapping.sourceContentID, this.sourceGuid, locale);
+                const targetItem = await this.getContentItem(mapping.targetContentID, this.targetGuid, locale);
+
+                if (!sourceItem || !targetItem) {
+                    result.skippedNotOnDisk++;
+                    continue;
+                }
+
+                const sourceRefName: string = sourceItem.properties?.referenceName;
+                const targetRefName: string = targetItem.properties?.referenceName;
+
+                if (!sourceRefName || !targetRefName) {
+                    console.log(colors.yellow(`  ⚠️  Missing referenceName for mapping ${mapping.sourceContentID} → ${mapping.targetContentID}`));
+                    continue;
+                }
+
+                const sourceRefNameLower = sourceRefName.toLowerCase();
+                const targetRefNameLower = targetRefName.toLowerCase();
+
+                // Check for duplicate container mappings
+                const sourceContainerCount = rawContainerMappings.filter(
+                    (m: any) => m.sourceReferenceName?.toLowerCase() === sourceRefNameLower
+                ).length;
+
+                const targetContainerCount = rawContainerMappings.filter(
+                    (m: any) => m.targetReferenceName?.toLowerCase() === targetRefNameLower
+                ).length;
+
+                if (sourceContainerCount > 1 || targetContainerCount > 1) {
+                    const issue: MappingHealthIssue = {
+                        type: 'duplicate_container_mapping',
+                        locale,
+                        sourceContentID: mapping.sourceContentID,
+                        targetContentID: mapping.targetContentID,
+                        sourceReferenceName: sourceRefName,
+                        targetReferenceName: targetRefName,
+                        message: `Duplicate container mappings detected. Source "${sourceRefName}" has ${sourceContainerCount} mapping(s), target "${targetRefName}" has ${targetContainerCount} mapping(s).`,
+                        sourceItem,
+                        targetItem
+                    };
+                    result.issues.push(issue);
+                    result.isHealthy = false;
+                    this.logBrokenMapping(issue);
+                    continue;
+                }
+
+                // Check if containers are mapped to each other
+                const sourceMappingEntry = containerMapper.getContainerMappingByReferenceName(sourceRefName, 'source');
+                const targetMappingEntry = containerMapper.getContainerMappingByReferenceName(targetRefName, 'target');
+
+                if (!sourceMappingEntry || !targetMappingEntry || sourceMappingEntry !== targetMappingEntry) {
+                    const referenceNamesMatch = sourceRefNameLower === targetRefNameLower;
+                    const issue: MappingHealthIssue = {
+                        type: referenceNamesMatch ? 'missing_container_mapping' : 'containers_not_mapped',
+                        locale,
+                        sourceContentID: mapping.sourceContentID,
+                        targetContentID: mapping.targetContentID,
+                        sourceReferenceName: sourceRefName,
+                        targetReferenceName: targetRefName,
+                        message: referenceNamesMatch
+                            ? `Item mapping looks correct (same container "${sourceRefName}"), but no container mapping entry exists for this referenceName.`
+                            : `Containers are not mapped to each other. Source container "${sourceRefName}" and target container "${targetRefName}" do not share a mapping entry.`,
+                        sourceItem,
+                        targetItem
+                    };
+                    result.issues.push(issue);
+                    result.isHealthy = false;
+                    this.logBrokenMapping(issue);
+                }
+            }
+
+            // Clear the in-place progress line and print locale summary
+            process.stdout.write('\r' + ' '.repeat(80) + '\r');
+            const apiNote = this.apiFetchCount > 0 ? colors.gray(` (${this.apiFetchCount} fetched from API)`) : '';
+            console.log(colors.green(`  ✓ ${locale} done`) + apiNote);
+        }
+
+        return result;
+    }
+
+    private logBrokenMapping(issue: MappingHealthIssue): void {
+        // Clear the in-place progress line before printing multi-line output
+        process.stdout.write('\r' + ' '.repeat(80) + '\r');
+
+        const icon =
+            issue.type === 'duplicate_container_mapping' ? '🔄' :
+            issue.type === 'missing_container_mapping'   ? '⚠️ ' : '❌';
+        const typeLabel =
+            issue.type === 'duplicate_container_mapping' ? 'DUPLICATE CONTAINER MAPPING' :
+            issue.type === 'missing_container_mapping'   ? 'MISSING CONTAINER MAPPING' : 'BROKEN MAPPING';
+
+        console.log(colors.red(`\n  ${icon} [${issue.locale}] ${typeLabel}`));
+        console.log(colors.red(`     Source Content ID : ${issue.sourceContentID}  (container: ${issue.sourceReferenceName})`));
+        console.log(colors.red(`     Target Content ID : ${issue.targetContentID}  (container: ${issue.targetReferenceName})`));
+        console.log(colors.red(`     Issue             : ${issue.message}`));
+    }
+
+    private async getContentItem(contentID: number, guid: string, locale: string): Promise<mgmtApi.ContentItem | null> {
+        // Try disk first (fast path — published items)
+        const fileOps = new fileOperations(guid, locale);
+        const onDisk = fileOps.readJsonFile(`item/${contentID}.json`);
+        if (onDisk) return onDisk as mgmtApi.ContentItem;
+
+        // Fall back to Management API (covers draft/staging items)
+        this.apiFetchCount++;
+        process.stdout.write(colors.gray(`  [api #${this.apiFetchCount}] fetching ${contentID} from ${guid} ...                \r`));
+        try {
+            const apiClient = getApiClient();
+            const item = await apiClient.contentMethods.getContentItem(contentID, guid, locale);
+            return item ?? null;
+        } catch {
+            return null;
+        }
+    }
+
+    private findMappingLocales(): string[] {
+        const mappingsDir = path.join(state.rootPath, 'mappings', `${this.sourceGuid}-${this.targetGuid}`);
+
+        if (!fs.existsSync(mappingsDir)) {
+            return [];
+        }
+
+        return fs.readdirSync(mappingsDir).filter(item => /^[a-z]{2}-[a-z]{2}$/i.test(item));
+    }
+}