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Monday, 28 September 2026 Reading Room

Tech

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. Five of the 24 behaved the same way everywhere. Three parsed to the same value and two were rejected by all six. The other 19 produced divergence : either some parsers accepted a document that others refused, or they all accepted it…

dev.to ·

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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

·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

·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.

·dev.to

Adobe Commerce Added an MCP Layer: Your Catalog Is Now an Agent's Tool

On Thursday, April 9, 2026, an AI shopping agent could call search_shop_catalog on any Shopify store's Storefront MCP endpoint and get products back.

  • Adobe Commerce introduced Commerce MCP server on April 9, 2026.
  • Catalog data now accessible to AI agents in real time.
  • Tool renamed to searchcatalog within nested catalog object.

·dev.to

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