Phase 14: B-002 pre-fix RPC repro — filter snapshots and readSettings fix

RPC E2E with debug shows registered present at session_compact but planned=[]
because kept still contains the skill block; registered=[] still drops skills
absent from kept. Sync file readSettings avoids RPC hook deadlock on
SettingsManager/isProjectTrusted.

Co-authored-by: Cursor <cursoragent@cursor.com>

test/diag.test.ts

@@ -56,6 +56,7 @@ describe("notifyReinjectDiag", () => {
 
 	it("notifies with JSON snapshot when debug is on", () => {
 		const notify = vi.fn();
+		const stderrSpy = vi.spyOn(console, "error").mockImplementation(() => {});
 		const settings = { ...createDefaultSettings(), debug: true };
 		const snapshot = {
 			tracked: ["a"],
@@ -73,9 +74,13 @@ describe("notifyReinjectDiag", () => {
 			"before_agent_start",
 			snapshot,
 		);
+		expect(stderrSpy).toHaveBeenCalledWith(
+			`skill-reinject [before_agent_start]: ${JSON.stringify(snapshot)}`,
+		);
 		expect(notify).toHaveBeenCalledWith(
 			`skill-reinject [before_agent_start]: ${JSON.stringify(snapshot)}`,
 			"info",
 		);
+		stderrSpy.mockRestore();
 	});
 });