diff --git a/README.md b/README.md
index d9d5a3b..3235dcb 100644
--- a/README.md
+++ b/README.md
@@ -98,7 +98,7 @@ All CLI invocations, arguments, and output are logged to the **Patchloom** outpu
 
 ### Compatibility diagnostics
 
-The extension detects outdated CLI builds and warns with upgrade guidance. It requires Patchloom `0.1.0` or newer.
+The extension detects outdated CLI builds and warns with upgrade guidance. It requires Patchloom `0.3.0` or newer.
 
 ---
 
@@ -148,7 +148,7 @@ The extension detects outdated CLI builds and warns with upgrade guidance. It re
 Set `patchloom.path` in settings, or add the CLI to your `PATH`.
 
 **CLI compatibility warning**
-Run `Patchloom: Open Releases` to download the latest release. The extension requires 0.1.0 or newer; 0.5.0 is recommended.
+Run `Patchloom: Open Releases` to download the latest release. The extension requires 0.3.0 or newer; 0.5.0 is recommended.
 
 **MCP config not injected**
 Run `Patchloom: Configure MCP` and select the target editor config.
@@ -183,7 +183,7 @@ File bugs and feature requests at [patchloom/patchloom-vscode/issues](https://gi
 ## Requirements
 
 - VS Code 1.90 or newer (or compatible editors: Cursor, Windsurf, VSCodium)
-- [Patchloom CLI](https://github.com/patchloom/patchloom) 0.1.0 or newer (0.5.0+ recommended for latest features including HTTP MCP transport, execute_plan, and expanded library API)
+- [Patchloom CLI](https://github.com/patchloom/patchloom) 0.3.0 or newer (0.5.0+ recommended for latest features including HTTP MCP transport, execute_plan, and expanded library API)
 
 ## Contributing
 
diff --git a/src/binary/patchloom.ts b/src/binary/patchloom.ts
index ea9d25f..5cc53e6 100644
--- a/src/binary/patchloom.ts
+++ b/src/binary/patchloom.ts
@@ -13,7 +13,7 @@ import { formatError } from "../util.js";
 
 const execFileAsync = promisify(execFile);
 
-export const MINIMUM_SUPPORTED_PATCHLOOM_VERSION = "0.1.0";
+export const MINIMUM_SUPPORTED_PATCHLOOM_VERSION = "0.3.0";
 export const PATCHLOOM_RELEASES_URL = "https://github.com/patchloom/patchloom/releases";
 export const PATCHLOOM_DOCS_URL = "https://patchloom.github.io/patchloom/";
 
diff --git a/test/unit/binary.test.ts b/test/unit/binary.test.ts
index 84daeb5..5a66eb3 100644
--- a/test/unit/binary.test.ts
+++ b/test/unit/binary.test.ts
@@ -132,7 +132,7 @@ test("ensurePatchloomReadyOrNotify returns path for ready supported status (test
   const path = await ensurePatchloomReadyOrNotify("", {
     configuredPath: "/good/patchloom",
     canExecute: async () => true,
-    getVersion: async () => "patchloom 0.2.0"
+    getVersion: async () => "patchloom 0.3.0"
   });
   assert.equal(path, "/good/patchloom");
 });
diff --git a/test/unit/binaryDiscovery.test.ts b/test/unit/binaryDiscovery.test.ts
index 0874e57..ada3c51 100644
--- a/test/unit/binaryDiscovery.test.ts
+++ b/test/unit/binaryDiscovery.test.ts
@@ -190,9 +190,9 @@ test("comparePatchloomVersions handles long prerelease chains", () => {
 });
 
 test("assessPatchloomCompatibility correctly identifies supported versions", () => {
-  const supported = assessPatchloomCompatibility("patchloom 0.1.0");
+  const supported = assessPatchloomCompatibility("patchloom 0.3.0");
   assert.equal(supported.compatibility, "supported");
-  assert.equal(supported.detectedVersion, "0.1.0");
+  assert.equal(supported.detectedVersion, "0.3.0");
 
   const newer = assessPatchloomCompatibility("patchloom 1.0.0");
   assert.equal(newer.compatibility, "supported");
diff --git a/test/unit/initializeProject.test.ts b/test/unit/initializeProject.test.ts
index ce9485a..0303fa2 100644
--- a/test/unit/initializeProject.test.ts
+++ b/test/unit/initializeProject.test.ts
@@ -149,7 +149,7 @@ test("buildStatusDetails includes compatibility upgrade guidance", () => {
     detectedVersion: "0.0.9",
     compatibility: "unsupported",
     minimumSupportedVersion: MINIMUM_SUPPORTED_PATCHLOOM_VERSION,
-    compatibilityMessage: "Patchloom 0.0.9 is older than the minimum supported version 0.1.0."
+    compatibilityMessage: `Patchloom 0.0.9 is older than the minimum supported version ${MINIMUM_SUPPORTED_PATCHLOOM_VERSION}.`
   }, {
     hasWorkspace: true,
     hasAgentsFile: true,
@@ -161,7 +161,7 @@ test("buildStatusDetails includes compatibility upgrade guidance", () => {
   });
 
   assert.match(details, /Detected CLI version: 0\.0\.9/);
-  assert.match(details, /Required CLI version: >= 0\.1\.0/);
+  assert.match(details, new RegExp(`Required CLI version: >= ${MINIMUM_SUPPORTED_PATCHLOOM_VERSION.replace(/\./g, "\\.")}`));
   assert.match(details, /CLI compatibility: upgrade required/);
   assert.match(details, /Environment: WSL/);
   assert.match(details, /Environment support: limited/);
@@ -217,7 +217,7 @@ test("preferredStatusAction points outdated CLI users to releases", () => {
     detectedVersion: "0.0.9",
     compatibility: "unsupported",
     minimumSupportedVersion: MINIMUM_SUPPORTED_PATCHLOOM_VERSION,
-    compatibilityMessage: "Patchloom 0.0.9 is older than the minimum supported version 0.1.0."
+    compatibilityMessage: `Patchloom 0.0.9 is older than the minimum supported version ${MINIMUM_SUPPORTED_PATCHLOOM_VERSION}.`
   });
 
   assert.deepEqual(action, {