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Checkmating the Hype: What LLM CHESS Reveals About 'Reasoning Models'

Chess is useful because it is rude. It does not care whether a model writes elegant explanations. It does not reward confident prose. It does not politely accept a move that looks plausible but violates the rules. Either the move is legal, the position improves, and the game continues—or the model has just exposed something that a benchmark score on math or coding can easily hide. ...

December 2, 2025 · 17 min · Zelina
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When Agents Treat Agents as Tools: What Tool-RoCo Tells Us About LLM Autonomy

Dispatch is where autonomy usually goes to die. A warehouse manager may have ten workers, three forklifts, two packing stations, and one increasingly dramatic dashboard. The hard part is not merely deciding what each person should do. The hard part is knowing when to call someone in, when to release them, and when extra “help” is just a polite name for congestion. ...

November 29, 2025 · 16 min · Zelina
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Tools of Habit: Why LLM Agents Benefit from a Little Inertia

Tools are where many agent demos quietly become invoices. A multi-step LLM agent may look intelligent because it reasons, acts, observes, and repeats. Under the hood, though, it often pays the model to decide every small next move: search here, load that node, look around, check valid actions, fill this argument, try again. Some of those decisions need judgement. Others are basically muscle memory wearing a lab coat. ...

November 20, 2025 · 14 min · Zelina
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Agents on the Clock: How TPS-Bench Exposes the Time Management Problem in AI

A competent assistant can make a list. A useful assistant knows what must happen first. That distinction sounds small until an AI agent is asked to do something ordinary and annoyingly realistic: check a calendar, search the web, compare options, use a map, assemble a recommendation, and perhaps create a document at the end. None of those steps is exotic. The difficulty is that some of them can run in parallel, some must wait for earlier results, and some become nonsense if executed too early. This is less “genius at work” than “junior operations manager with access to too many browser tabs.” Naturally, it is where things get interesting. ...

November 6, 2025 · 13 min · Zelina
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When the Sandbox Thinks Back: Training AI Agents in Simulated Realities

Workflow software has a deeply unglamorous problem: reality keeps changing. A customer support agent may know the refund policy, but then the customer changes their address, the order record has a missing field, the tool returns a cryptic error, and the next API call requires a schema nobody mentioned in the demo. A spreadsheet agent may know how to summarise a table, but the file path is wrong, the calendar has a conflicting event, and the “obvious” action fails because the world, in its charmingly vindictive way, is not a benchmark prompt. ...

November 6, 2025 · 18 min · Zelina
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The Agent Olympics: How Toolathlon Tests the Limits of AI Workflows

Office work is not one task. It is a chain of small obligations pretending to be one task. “Check the homework submissions, download the attached Python files, run them, grade the students in Canvas, and use the latest submission if someone sent more than one.” That sounds like a normal administrative request. It is also a compact torture device for an AI agent. The agent must read email, handle attachments, inspect local files, run code, interpret results, map students to course records, update Canvas, and not confidently grade the wrong person. Easy, apparently, as long as nothing has to actually work. ...

November 4, 2025 · 17 min · Zelina
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The Esperanto of AI Agents: How the Agent Data Protocol Unifies a Fragmented Ecosystem

Every engineering team has met this problem: the useful data exists, but it lives in thirteen different shapes, three different tool conventions, two incompatible logs, and one heroic spreadsheet that nobody dares to open. AI agents have the same disease, only with more acronyms. The paper behind the Agent Data Protocol, or ADP, argues that large-scale supervised fine-tuning of AI agents has been held back less by a lack of data than by a lack of shared representation.1 Agent datasets already exist for coding, software engineering, web browsing, API use, operating-system interaction, and general tool use. The difficulty is that each one tends to encode actions, observations, tool calls, web states, messages, and execution feedback in its own local dialect. Naturally, every dataset is special. How convenient for nobody. ...

November 2, 2025 · 12 min · Zelina
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Deep Thinking, Dynamic Acting: How DeepAgent Redefines General Reasoning

Tools are where agent demos go to die. The pitch is usually elegant. Give the model a goal, attach a few APIs, let it reason, and watch the automation glide across systems like a tiny consultant with no calendar conflicts. Then the real world appears: too many tools, unclear documentation, stale context, partial failures, long interaction histories, and the occasional API response that seems to have been designed by someone settling a personal score. ...

October 31, 2025 · 15 min · Zelina
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Backtrack to Breakthrough: Why Great AI Agents Revisit

Search is easy. Knowing when to go back is harder. That is the useful irritation inside GSM-Agent, a new benchmark for studying agentic reasoning under controlled conditions.1 The paper takes grade-school maths problems from GSM8K, removes the premises from the prompt, hides those premises in a searchable document database, and asks an LLM agent to recover the facts before solving the problem. The arithmetic is not supposed to be impressive. That is the point. If a model fails here, we cannot calmly blame differential geometry, PhD-level law, or some mysteriously adversarial enterprise workflow. The agent simply did not find and use the facts. ...

October 3, 2025 · 15 min · Zelina
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Lost in the Long Game: What UltraHorizon Reveals About Agent Failure at Scale

Budget is the most comforting word in enterprise AI. Give the agent a bigger context window. Give it more tool calls. Give it more time. Give it a notebook, a browser, a Python interpreter, a reminder to “think step by step,” and perhaps a small motivational speech about being thorough. Surely the system will become more reliable. ...

October 3, 2025 · 16 min · Zelina