diff --git a/packages/coding-agent/CHANGELOG.md b/packages/coding-agent/CHANGELOG.md
index 25c809467..098f93210 100644
--- a/packages/coding-agent/CHANGELOG.md
+++ b/packages/coding-agent/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## [Unreleased]
 
+### Fixed
+
+- Fixed `omp plugin install` failing extension validation for pi extensions that import `compact` from `@earendil-works/pi-coding-agent` (e.g. pi-claude-bridge) — the legacy `@oh-my-pi/pi-coding-agent` shim did not forward `compact` (it lives in `@oh-my-pi/pi-agent-core/compaction`, the same module as the already-bridged `estimateTokens`), so a named import threw Bun's static "Export named 'compact' not found" error. Added the missing `compact` re-export ([#7174](https://github.com/can1357/oh-my-pi/issues/7174)).
+
 ## [17.2.1] - 2026-07-30
 
 ### Added
diff --git a/packages/coding-agent/src/extensibility/legacy-pi-coding-agent-shim.ts b/packages/coding-agent/src/extensibility/legacy-pi-coding-agent-shim.ts
index 6c7857963..db00bb11c 100644
--- a/packages/coding-agent/src/extensibility/legacy-pi-coding-agent-shim.ts
+++ b/packages/coding-agent/src/extensibility/legacy-pi-coding-agent-shim.ts
@@ -1416,11 +1416,11 @@ export function getPackageDir(): string {
 }
 
 // Legacy pi's `@earendil-works/pi-coding-agent` re-exported `estimateTokens`
-// from its package root (via `./core/compaction/index.ts`). In omp it lives in
-// `@oh-my-pi/pi-agent-core/compaction`, and the coding-agent barrel below does
-// not forward it, so legacy extensions importing it fail Bun's static export
-// check during validation (issue #6583).
-export { estimateTokens } from "@oh-my-pi/pi-agent-core/compaction";
+// and `compact` from its package root (via `./core/compaction/index.ts`). In
+// omp both live in `@oh-my-pi/pi-agent-core/compaction`, and the coding-agent
+// barrel below does not forward them, so legacy extensions importing either
+// fail Bun's static export check during validation (issues #6583, #7174).
+export { compact, estimateTokens } from "@oh-my-pi/pi-agent-core/compaction";
 
 // Same barrel gap for two more legacy package-root exports: pi re-exported the
 // `CONFIG_DIR_NAME` constant and the CLI parser `parseArgs`. In omp
diff --git a/packages/coding-agent/test/extensibility/legacy-pi-compaction-helpers.test.ts b/packages/coding-agent/test/extensibility/legacy-pi-compaction-helpers.test.ts
index 20fcf66a2..e46773c84 100644
--- a/packages/coding-agent/test/extensibility/legacy-pi-compaction-helpers.test.ts
+++ b/packages/coding-agent/test/extensibility/legacy-pi-compaction-helpers.test.ts
@@ -1,5 +1,5 @@
 import { describe, expect, it } from "bun:test";
-import { estimateTokens } from "@oh-my-pi/pi-coding-agent/extensibility/legacy-pi-coding-agent-shim";
+import { compact, estimateTokens } from "@oh-my-pi/pi-coding-agent/extensibility/legacy-pi-coding-agent-shim";
 
 // Issue #6583: pi extensions import `estimateTokens` from
 // `@earendil-works/pi-coding-agent`, which aliases to this shim. Legacy pi
@@ -16,4 +16,12 @@ describe("legacy shim compaction helpers", () => {
 		const tokens = estimateTokens({ role: "user", content: "hello world", timestamp: Date.now() });
 		expect(tokens).toBeGreaterThan(0);
 	});
+
+	// Issue #7174: `compact` (same `@oh-my-pi/pi-agent-core/compaction` module as
+	// `estimateTokens`) was likewise absent from the shim surface, so
+	// `omp plugin install npm:pi-claude-bridge` failed with "Export named
+	// 'compact' not found". Pin the callable re-export.
+	it("re-exports compact as a callable function", () => {
+		expect(typeof compact).toBe("function");
+	});
 });