MEMORANDUM

Dennis Barnett, a California state prisoner, appeals the district court’s dismissal of his 28 U.S.C. § 2254 habeas petition. Barnett raised several different ineffective assistance of counsel claims in his pro se petition, but the claim at issue in this appeal — stemming from the alleged failure of trial counsel to raise Barnett’s competency following Barnett’s testimony at trial — was “buried,” by Barnett’s own description, amid hundreds of pages of ev- identiary exhibits appended to his petition. We conclude that Barnett did not adequately plead the contested ineffective assistance of counsel claim and affirm the dismissal of his petition.

A- pro se habeas petition is “given the benefit of liberal construction,” Porter v. Ollison, 620 F.3d 952, 958 (9th Cir.2010), but even “a liberal interpretation ... may not supply' ... [a] claim that [was] not initially pled.” Ivey v. Bd. of Regents of Univ. of Alaska, 673 F.2d 266, 268 (9th Cir.1982). Moreover, it is well established that “[p]ro se litigants must follow the same rules of procedure that govern other litigants.” King v. Atiyeh, 814 F.2d 565, 567 (9th Cir.1987), overruled on other grounds by Lacey v. Maricopa Cty., 693 F.3d 896 (9th Cir.2012) (en banc). Here, “Rule 2(c) of the Rules Governing Habeas Corpus Cases ... instructs the petitioner to ‘specify all the grounds for relief available to [him]’ and to ‘state the facts supporting each ground.’ ” Mayle v. Felix, 545 U.S. 644, 649 , 125 S.Ct. 2562 , 162 L.Ed.2d 582 (2005) (citation omitted). Nonetheless, a federal habeas petitioner adequately pleads an otherwise ambiguous claim by making “clear and repeated” references to an appended supporting brief that presents the claim with sufficient particularity. Dye v. Hofbauer, 546 U.S. 1, 4 , 126 S.Ct. 5 , 163 L.Ed.2d 1 (2005).

Barnett failed to plead the ineffective assistance of counsel claim at issue in this appeal with the requisite specificity. The petition’s general references to hundreds of pages of attached exhibits are insufficient to incorporate the claim. See Dye, 546 U.S. at 4 , 126 S.Ct. 5 ; cf. Baldwin v. Reese, 541 U.S. 27, 32 , 124 S.Ct. 1347 , 158 L.Ed.2d 64 (2004). Although Barnett’s state habeas petition contains the ineffective assistance of counsel claim at issue in this appeal, Barnett did not make clear and repeated references to the attached state petition in his federal habeas petition. Of the thirty pages of his federal habeas petition, Barnett made only two references to his state habeas petition and neither reference clearly indicates that he intended to incorporate into his federal petition the claims of his state petition. “Habeas claims that are not raised before the district court in the petition are not cognizable on appeal.” Cacoperdo v. Demosthenes, 37 F.3d 504, 507 (9th Cir.1994) (citing King v. Rowland, 977 F.2d 1354, 1357 (9th Cir.1992)).

Barnett asserts that the district court should have considered an amended pro se habeas petition that he mailed to the district court in December 2008. Barnett does not suggest that the proposed amended petition should have been filed. Rather, Barnett’s argument appears to be that the district court should have treated the document as further evidence informing the evaluation of whether Barnett’s original federal habeas petition indicated an intent to incorporate the contested ineffective assistance of counsel claim. Barnett cites no authority for the proposition that a district court is obligated to look beyond the petition and attached exhibits when determining whether that petition adequately pleads a claim. See Rule 4, Rules Governing Section 2254 Cases in the United States District Courts (directing the inquiry at the motion to dismiss stage to “the petition and any attached exhibits”).

AFFIRMED.

This disposition is not appropriate for publication and is not precedent except as provided by 9th Cir. R. 36-3.