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Amount of working capital loans.

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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Value of input used to measure debt instrument, including, but not limited to, convertible and non-convertible debt.

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Carrying value as of the balance sheet date of portion of long-term loans payable due within one year or the operating cycle if longer.

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Cash payments for and related to principal collection on loans related to operating activities.

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Per share or per unit amount of equity securities issued.

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Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=meshu_SponsorMember
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Related Party Transactions (Details)								3 Months Ended	12 Months Ended
Related Party Transactions (Details)	Dec. 17, 2025 USD ($)	Dec. 12, 2025 USD ($)	Dec. 11, 2025 $ / shares shares	Dec. 09, 2025 USD ($)	Nov. 14, 2025 USD ($) $ / shares shares	Sep. 08, 2025 USD ($) $ / shares shares	Jul. 28, 2025 USD ($) shares	Mar. 31, 2026 USD ($) $ / shares	Dec. 31, 2025 USD ($)
Related Party Transactions [Line Items]
Compensation expense
Working capital loans
Aggregate payment				$ 20,000
Administrative services fee								60,000
Promissory Note — Related Party [Member]
Related Party Transactions [Line Items]
Borrowings outstanding		$ 219,450
Over payment	$ 25,000
Aggregate loans payable								$ 300,000
Working Capital Loans [Member]
Related Party Transactions [Line Items]
Price per share \| $ / shares								$ 1.5
Working capital loans								$ 1,500,000
Over-Allotment Option [Member]
Related Party Transactions [Line Items]
Price per share \| $ / shares			$ 10
Maximum [Member]
Related Party Transactions [Line Items]
Trading days								30 days
Minimum [Member]
Related Party Transactions [Line Items]
Trading days								20 days
Risk-free rate (continuous) [Member]
Related Party Transactions [Line Items]
Fair value measurement input					0.0396	0.0417
Implied Class A share price [Member]
Related Party Transactions [Line Items]
Price per share \| $ / shares						$ 9.92
Market Adjustment [Member]
Related Party Transactions [Line Items]
Fair value measurement input						0.191
Class A Ordinary Shares [Member]
Related Party Transactions [Line Items]
Price per share \| $ / shares			$ 11.5
Closing price per shares \| $ / shares								$ 12
Class B Ordinary Shares [Member] \| Over-Allotment Option [Member]
Related Party Transactions [Line Items]
Shares subject to forfeiture \| shares							1,125,000
Founder Shares [Member]
Related Party Transactions [Line Items]
Issuance of ordinary shares \| shares					300,000	245,000
Aggregate price					$ 1,022,965	$ 545,000	$ 25,000
Price per share \| $ / shares					$ 1.88
Shares subject to forfeiture \| shares			1,125,000
Founder Shares [Member] \| Class B Ordinary Shares [Member]
Related Party Transactions [Line Items]
Issuance of ordinary shares \| shares							8,625,000
Sponsor [Member]
Related Party Transactions [Line Items]
Administrative services fee								$ 44,839	$ 14,839