diff --git a/packages/cli/src/cli/commands/project/validate.ts b/packages/cli/src/cli/commands/project/validate.ts
new file mode 100644
index 00000000..cb3b82b1
--- /dev/null
+++ b/packages/cli/src/cli/commands/project/validate.ts
@@ -0,0 +1,180 @@
+import { dirname, join, relative } from "node:path";
+import { log } from "@clack/prompts";
+import { Command } from "commander";
+import { globby } from "globby";
+import { z } from "zod";
+import type { CLIContext } from "@/cli/types.js";
+import { runCommand } from "@/cli/utils/index.js";
+import type { RunCommandResult } from "@/cli/utils/runCommand.js";
+import {
+  CONFIG_FILE_EXTENSION_GLOB,
+  FUNCTION_CONFIG_GLOB,
+} from "@/core/consts.js";
+import {
+  ConfigNotFoundError,
+  findProjectRoot,
+  ProjectConfigSchema,
+  pathExists,
+  readJsonFile,
+} from "@/core/index.js";
+import { AgentConfigSchema } from "@/core/resources/agent/schema.js";
+import { ConnectorResourceSchema } from "@/core/resources/connector/schema.js";
+import { EntitySchema } from "@/core/resources/entity/schema.js";
+import { FunctionConfigSchema } from "@/core/resources/function/schema.js";
+
+interface FileResult {
+  relativePath: string;
+  valid: boolean;
+  errorText?: string;
+}
+
+async function validateFiles(
+  dir: string,
+  glob: string,
+  schema: z.ZodType,
+  projectRoot: string,
+): Promise<FileResult[]> {
+  if (!(await pathExists(dir))) {
+    return [];
+  }
+
+  const files = await globby(glob, { cwd: dir, absolute: true });
+  const results: FileResult[] = [];
+
+  for (const filePath of files) {
+    const relativePath = relative(projectRoot, filePath);
+    try {
+      const parsed = await readJsonFile(filePath);
+      const result = schema.safeParse(parsed);
+      if (result.success) {
+        results.push({ relativePath, valid: true });
+      } else {
+        results.push({
+          relativePath,
+          valid: false,
+          errorText: z.prettifyError(result.error),
+        });
+      }
+    } catch (error) {
+      results.push({
+        relativePath,
+        valid: false,
+        errorText: error instanceof Error ? error.message : String(error),
+      });
+    }
+  }
+
+  return results;
+}
+
+function printResults(results: FileResult[]): void {
+  for (const result of results) {
+    if (result.valid) {
+      log.success(result.relativePath);
+    } else {
+      const indented = result.errorText
+        ?.split("\n")
+        .map((line) => `  ${line}`)
+        .join("\n");
+      log.error(`${result.relativePath}\n${indented ?? ""}`);
+    }
+  }
+}
+
+async function validateAction(): Promise<RunCommandResult> {
+  const found = await findProjectRoot();
+  if (!found) {
+    throw new ConfigNotFoundError();
+  }
+
+  const { root, configPath } = found;
+  const relConfigPath = relative(root, configPath);
+  const allResults: FileResult[] = [];
+
+  // Validate project config first — we need it to know resource dirs
+  const configParsed = await readJsonFile(configPath);
+  const configResult = ProjectConfigSchema.safeParse(configParsed);
+
+  if (!configResult.success) {
+    allResults.push({
+      relativePath: relConfigPath,
+      valid: false,
+      errorText: z.prettifyError(configResult.error),
+    });
+    printResults(allResults);
+    process.exitCode = 1;
+    return { outroMessage: "1 file checked — 0 passed, 1 failed" };
+  }
+
+  allResults.push({ relativePath: relConfigPath, valid: true });
+
+  const config = configResult.data;
+  const configDir = dirname(configPath);
+
+  // Validate all resource types in parallel
+  const [entityResults, agentResults, connectorResults, functionResults] =
+    await Promise.all([
+      validateFiles(
+        join(configDir, config.entitiesDir),
+        `*.${CONFIG_FILE_EXTENSION_GLOB}`,
+        EntitySchema,
+        root,
+      ),
+      validateFiles(
+        join(configDir, config.agentsDir),
+        `*.${CONFIG_FILE_EXTENSION_GLOB}`,
+        AgentConfigSchema,
+        root,
+      ),
+      validateFiles(
+        join(configDir, config.connectorsDir),
+        `*.${CONFIG_FILE_EXTENSION_GLOB}`,
+        ConnectorResourceSchema,
+        root,
+      ),
+      validateFiles(
+        join(configDir, config.functionsDir),
+        FUNCTION_CONFIG_GLOB,
+        FunctionConfigSchema,
+        root,
+      ),
+    ]);
+
+  allResults.push(
+    ...entityResults,
+    ...agentResults,
+    ...connectorResults,
+    ...functionResults,
+  );
+
+  printResults(allResults);
+
+  const failCount = allResults.filter((r) => !r.valid).length;
+  const passCount = allResults.length - failCount;
+  const total = allResults.length;
+
+  if (failCount > 0) {
+    process.exitCode = 1;
+  }
+
+  return {
+    outroMessage:
+      failCount > 0
+        ? `${total} file${total !== 1 ? "s" : ""} checked — ${passCount} passed, ${failCount} failed`
+        : `All ${passCount} file${passCount !== 1 ? "s" : ""} valid`,
+  };
+}
+
+export function getValidateCommand(context: CLIContext): Command {
+  return new Command("validate")
+    .description(
+      "Validate all resource config files in the project (entities, functions, agents, connectors)",
+    )
+    .action(async () => {
+      await runCommand(
+        validateAction,
+        { requireAuth: false, requireAppConfig: false },
+        context,
+      );
+    });
+}
diff --git a/packages/cli/src/cli/program.ts b/packages/cli/src/cli/program.ts
index e83edde4..db8e7b26 100644
--- a/packages/cli/src/cli/program.ts
+++ b/packages/cli/src/cli/program.ts
@@ -17,6 +17,7 @@ import { getTypesCommand } from "@/cli/commands/types/index.js";
 import packageJson from "../../package.json";
 import { getDevCommand } from "./commands/dev.js";
 import { getEjectCommand } from "./commands/project/eject.js";
+import { getValidateCommand } from "./commands/project/validate.js";
 import type { CLIContext } from "./types.js";
 
 export function createProgram(context: CLIContext): Command {
@@ -44,6 +45,7 @@ export function createProgram(context: CLIContext): Command {
   program.addCommand(getDeployCommand(context));
   program.addCommand(getLinkCommand(context));
   program.addCommand(getEjectCommand(context));
+  program.addCommand(getValidateCommand(context));
 
   // Register entities commands
   program.addCommand(getEntitiesPushCommand(context));
diff --git a/packages/cli/tests/cli/validate.spec.ts b/packages/cli/tests/cli/validate.spec.ts
new file mode 100644
index 00000000..311858fd
--- /dev/null
+++ b/packages/cli/tests/cli/validate.spec.ts
@@ -0,0 +1,87 @@
+import { describe, it } from "vitest";
+import { fixture, setupCLITests } from "./testkit/index.js";
+
+describe("validate command", () => {
+  const t = setupCLITests();
+
+  it("fails when not in a project directory", async () => {
+    const result = await t.run("validate");
+
+    t.expectResult(result).toFail();
+    t.expectResult(result).toContain("No Base44 project found");
+  });
+
+  it("succeeds with only a config file and no resource files", async () => {
+    await t.givenProject(fixture("basic"));
+
+    const result = await t.run("validate");
+
+    t.expectResult(result).toSucceed();
+    t.expectResult(result).toContain("valid");
+  });
+
+  it("shows valid entities as passing", async () => {
+    await t.givenProject(fixture("with-entities"));
+
+    const result = await t.run("validate");
+
+    t.expectResult(result).toSucceed();
+    t.expectResult(result).toContain("entities");
+  });
+
+  it("fails and shows error for invalid entity", async () => {
+    await t.givenProject(fixture("invalid-entity"));
+
+    const result = await t.run("validate");
+
+    t.expectResult(result).toFail();
+    t.expectResult(result).toContain("name");
+  });
+
+  it("fails and shows error for invalid agent", async () => {
+    await t.givenProject(fixture("invalid-agent"));
+
+    const result = await t.run("validate");
+
+    t.expectResult(result).toFail();
+    t.expectResult(result).toContain("agents");
+  });
+
+  it("fails and shows error for invalid function config", async () => {
+    await t.givenProject(fixture("invalid-function-config"));
+
+    const result = await t.run("validate");
+
+    t.expectResult(result).toFail();
+    t.expectResult(result).toContain("function");
+  });
+
+  it("validates all resource types in a full project", async () => {
+    await t.givenProject(fixture("full-project"));
+
+    const result = await t.run("validate");
+
+    t.expectResult(result).toSucceed();
+    t.expectResult(result).toContain("valid");
+  });
+
+  it("collects all errors without stopping at first failure", async () => {
+    await t.givenProject(fixture("invalid-entity"));
+
+    const result = await t.run("validate");
+
+    // Should show a summary with count, not just bail on first file
+    t.expectResult(result).toFail();
+    t.expectResult(result).toContain("failed");
+  });
+
+  it("does not require authentication", async () => {
+    // No login, just project setup
+    await t.givenProject(fixture("with-entities"));
+
+    const result = await t.run("validate");
+
+    // Should not fail with auth error
+    t.expectResult(result).toSucceed();
+  });
+});
diff --git a/packages/cli/tests/fixtures/invalid-function-config/base44/config.jsonc b/packages/cli/tests/fixtures/invalid-function-config/base44/config.jsonc
new file mode 100644
index 00000000..4296e8ff
--- /dev/null
+++ b/packages/cli/tests/fixtures/invalid-function-config/base44/config.jsonc
@@ -0,0 +1,3 @@
+{
+  "name": "Invalid Function Config Test",
+}
diff --git a/packages/cli/tests/fixtures/invalid-function-config/base44/functions/send-email/function.jsonc b/packages/cli/tests/fixtures/invalid-function-config/base44/functions/send-email/function.jsonc
new file mode 100644
index 00000000..6d468082
--- /dev/null
+++ b/packages/cli/tests/fixtures/invalid-function-config/base44/functions/send-email/function.jsonc
@@ -0,0 +1,4 @@
+{
+  // missing required "name" field
+  "entry": "index.ts"
+}