Exhibit 99.1

JOINT FILING AGREEMENT

Pursuant to Rule 13d-1(k)(1) promulgated pursuant to the Securities Exchange Act of 1934, as amended, the undersigned agree that the attached Schedule 13D is being filed on behalf of each of the undersigned.

Date: August 7, 2025


	Atlas Venture Fund XII, L.P.

	By:	Atlas Venture Associates XII, L.P., its general partner
	By:	Atlas Venture Associates XII, LLC, its general partner

	By: /s/ Ommer Chohan
	Name:	Ommer Chohan
	Title:	Chief Financial Officer

	Atlas Venture Associates XII, L.P.

	By:	Atlas Venture Associates XII, LLC, its general partner

	By: /s/ Ommer Chohan
	Name:	Ommer Chohan
	Title:	Chief Financial Officer

	Atlas Venture Associates XII, LLC

	By: /s/ Ommer Chohan
	Name:	Ommer Chohan
	Title:	Chief Financial Officer

	Atlas Venture Opportunity Fund I, L.P.

	By:	Atlas Venture Associates Opportunity I, L.P., its general partner
	By:	Atlas Venture Associates Opportunity I, LLC, its general partner

	By: /s/ Ommer Chohan
	Name:	Ommer Chohan
	Title:	Chief Financial Officer

	Atlas Venture Associates Opportunity I, L.P.

	By:	Atlas Venture Associates Opportunity I, LLC, its general partner

	By: /s/ Ommer Chohan
	Name:	Ommer Chohan
	Title:	Chief Financial Officer

	Atlas Venture Associates Opportunity I, LLC

	By: /s/ Ommer Chohan
	Name:	Ommer Chohan
	Title:	Chief Financial Officer

Vigil Neuroscience, Inc. SCHEDULE 13D/A