My Wi-Fi drops every day at the same time, and I finally understand it's not my router

Your MCP server changed last night. Your agent didn't notice.

TL;DR: An MCP server can change what its tools say after you approve it. Your agent reads the new description as instructions.

• MCP server altered tools after approval
• Claude Code treats new tools as new instructions
• Security vulnerabilities possible from unrecognized changes

1h ago ·dev.to

I gave 24 awkward JSON documents to 6 parsers. Five behaved the same everywhere.

JSON is the format everyone agrees on. So I wrote 24 awkward but small documents, fed the identical bytes to six parsers on one laptop, and compared what came back.

1h ago ·dev.to

iraca: verificación diferencial independiente de ML-KEM (FIPS 203) en RustCrypto

Qué hicimos iraca es un arnés que verifica la criptografía post-cuántica que el ecosistema Rust realmente usa, diferenciándola contra una implementación independiente .

• IRACA developed harness to verify ML-KEM (FIPS 203) in RustCrypto
• RustCrypto crate ml-kem identical to pq-crystals reference in key generation
• IRACA's method ensures functional differential testing with 128 seeds

1h ago ·dev.to

Async LINQ: Why ToListAsync Exists (And Why WhereAsync Doesn't)

Async LINQ: Why ToListAsync Exists (And Why WhereAsync Doesn't) You write await dbContext.Products.ToListAsync() . Good. Then you wonder: where's WhereAsync ?

• ToListAsync exists to execute LINQ queries asynchronously at terminal operators.
• WhereAsync doesn't exist because Where operator doesn't interact with the database.
• Entity Framework Core provides async versions of execution-triggering operators.

1h ago ·dev.to