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Turning Heads: Why AI Still Gets Lost When It Turns Around

A room is a cruelly simple test for artificial intelligence. Put a person inside it. Tell them they are facing an avocado. Ask them to turn right by 270 degrees, then left by 90 degrees. Give them a few observations along the way. After the final turn, ask what they can see. ...

April 20, 2026 · 17 min · Zelina
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Beyond the Linear Ceiling: Why Non-Linearity Is the Next Frontier in PEFT

More Rank Is Not Always More Capacity Fine-tuning teams love a simple knob. If the model underperforms, increase rank. If the adapter looks too small, increase rank. If the downstream task is hard, increase rank again and call it strategy. This is comforting because rank is measurable, budgetable, and easy to explain in a meeting. Unfortunately, reality has its usual habit of being less cooperative. ...

March 1, 2026 · 16 min · Zelina
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When Fine-Tuning Bites Back: The Hidden Safety Drift in Vision-Language Agents

Customization sounds harmless. A company takes a capable vision-language model, adds a lightweight adapter, fine-tunes it on a narrow internal dataset, and calls the result “domain-specialized.” The dashboard still has green boxes. boxes. The model still answers normal text questions. The update is cheap, fast, and reversible in theory. Everyone goes home with the comfortable feeling that parameter-efficient fine-tuning is basically a productivity tool with a nerdy name. ...

February 21, 2026 · 17 min · Zelina
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Merge Without a Mess: Adaptive Model Fusion in the Age of LLM Sprawl

Models pile up quietly. A customer-support model here. A finance QA model there. A legal drafting variant that nobody wants to delete because it passed last quarter’s evaluation. A sales assistant fine-tuned on a dataset that may or may not still represent how the company sells. Then come LoRA adapters, instruction-tuned checkpoints, safety-tuned variants, regional versions, and a few “temporary” experiments that become permanent because nobody enjoys breaking production on a Friday. ...

February 14, 2026 · 13 min · Zelina
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When AI Forgets on Purpose: Why Memorization Is the Real Bottleneck

Fine-tuning is supposed to be the polite part of AI customization. A company uploads domain data. A provider adapts an aligned model. The final model still refuses harmful requests, still answers useful questions, and ideally becomes more competent at the client’s narrow task. Everyone nods. The demo works. The governance slide says “safety preserved.” The slide, as usual, is doing a lot of unpaid labor. ...

February 7, 2026 · 15 min · Zelina
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Identity Crisis: How a Trivial Trick Teaches LLMs to Think Backwards

Facts are rude. They rarely arrive in the direction your software needs them. A customer database may know that Alice reports to Bob, while the compliance officer asks, “Who reports to Bob?” A product catalog may store that SKU-17 belongs to Category X, while the chatbot receives, “Show me all products in Category X.” A medical knowledge base may encode one directional relation, while the user asks for the inverse. Humans treat these as the same fact seen from opposite ends. Language models, being very expensive autocomplete machines with a talent for plausible theater, do not always share our confidence. ...

February 3, 2026 · 18 min · Zelina
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Small Models, Big Mouths: Why Game AI Doesn’t Need Giant Brains

Game AI has a very ordinary problem: it has to work while the player is waiting. Not eventually. Not after a cloud round trip. Not after an impressive model has finished contemplating the metaphysics of medieval tavern gossip. In a game, intelligence has to fit inside latency budgets, memory budgets, design constraints, and the deeply unromantic fact that many players expect single-player games to work offline. ...

February 3, 2026 · 17 min · Zelina
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Model Cannibalism: When LLMs Learn From Their Own Echo

Feedback is usually sold as the civilized part of AI deployment. Users interact with the model. The product team collects prompts, outputs, ratings, usage logs, corrections, maybe a few thumbs-up signals. The model is fine-tuned. The next version is better. Everybody nods. A dashboard is opened. Someone says “continuous improvement.” The room relaxes. ...

January 9, 2026 · 19 min · Zelina
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Forgetting That Never Happened: The Shallow Alignment Trap

Forgetting That Never Happened: The Shallow Alignment Trap Forgetfulness is an expensive diagnosis. When an internal AI system performs well on last month’s support taxonomy, then underperforms after being fine-tuned on this month’s compliance cases, the obvious story is simple: the model forgot. That story usually triggers an equally obvious response: replay old data, retrain more broadly, freeze more parameters, or panic politely in a meeting while calling it “model lifecycle management.” ...

December 27, 2025 · 17 min · Zelina
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Timeline Triage: How LLMs Learn to Read Between Clinical Lines

Hospital notes are not databases that forgot to wear a spreadsheet costume. They are fragments of care: treatment names, planned cycles, delayed doses, discontinued regimens, relative dates, typos, abbreviations, and the occasional phrase that looks obvious until two clinicians disagree about what it actually means. For oncology, that mess matters. A chemotherapy timeline is not just a historical summary; it is the skeleton of a patient’s treatment journey. Get the timeline wrong, and downstream systems may misunderstand what was given, when it started, when it ended, and whether a patient fits a registry, audit, research cohort, or trial-matching rule. ...

December 7, 2025 · 16 min · Zelina