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Kernel Kombat: How Multi‑Agent LLMs Squeeze 1.32× More From Your GPUs

TL;DR Astra is a multi‑agent LLM system that optimizes existing CUDA kernels instead of generating them from PyTorch. On three production‑relevant SGLang kernels, it delivered 1.32× average speedup (up to 1.46×) without fine‑tuning—just structured zero‑shot prompting. The win isn’t a single trick; it’s a division of labor: testing, profiling, planning, and coding each handled by a specialized agent that iterates toward faster, still‑correct kernels. Why this matters for business readers GPU efficiency is the new gross margin. If your serving stack pushes trillions of tokens per day, a 25–45% kernel‑level speedup compounds into: ...

September 13, 2025 · 4 min · Zelina
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Stop, Verify, and Listen: HALT‑RAG Brings a ‘Reject Option’ to RAG

The big idea RAG pipelines are only as reliable as their weakest link: generation that confidently asserts things the sources don’t support. HALT‑RAG proposes an unusually pragmatic fix: don’t fine‑tune a big model—ensemble two strong, frozen NLI models, add lightweight lexical features, train a tiny task‑adapted meta‑classifier, and calibrate it so you can abstain when uncertain. The result isn’t just accuracy; it’s a governable safety control you can dial to meet business risk. ...

September 13, 2025 · 4 min · Zelina
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Tool Time, Any Time: Inside RLFactory’s Plug‑and‑Play RL for Multi‑Turn Tool Use

Large language models are finally learning to work the tools instead of merely talking about them. RLFactory proposes a clean way to post‑train LLMs for multi‑turn tool use by rebuilding the reinforcement learning loop around tool feedback, not just text. The result: quicker training, higher stability, and a framework teams can actually adopt. Why this matters (and where prior setups struggle) Most RL-for-LLMs treat the environment as pure text: the model thinks, emits tokens, gets a scalar reward. But real tasks—searching, querying databases, compiling code, booking travel—depend on external tools that return structured results, fail intermittently, and vary in latency and format. Hard problems emerge: ...

September 13, 2025 · 4 min · Zelina
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Branching Out of the Middle: How a ‘Tree of Agents’ Fixes Long-Context Blind Spots

TL;DR — Tree of Agents (TOA) splits very long documents into chunks, lets multiple agents read in different orders, shares evidence, prunes dead-ends, caches partial states, and then votes. The result: fewer hallucinations, resilience to the “lost in the middle” effect, and accuracy comparable to premium large models—while using a compact backbone. Why this matters for operators If your business parses contracts, annual reports, medical SOPs, or call-center transcripts, you’ve likely felt the pain of long-context LLMs: critical details buried mid-document get ignored; retrieval misses cross-paragraph logic; and bigger context windows inflate cost without guaranteeing better reasoning. TOA is a pragmatic middle path: it re-imposes structure on attention—not by scaling a single monolith, but by coordinating multiple lightweight readers with disciplined information exchange. ...

September 12, 2025 · 4 min · Zelina
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Fault Lines & Safety Nets: How RAFFLES Finds the First Domino in Agent Failures

TL;DR Most LLM agent evaluations judge the final answer. RAFFLES flips the lens to where the first causal error actually happened—then iterates with a Judge–Evaluator loop to verify primacy, fault-ness, and non-correction. On the Who&When benchmark, RAFFLES materially outperforms one-shot judges and router-style baselines. For builders, this is a template for root-cause analytics on long-horizon agents, not just scorekeeping. Why we need decisive-fault attribution (not just pass/fail) Modern agent stacks—routers, tool-callers, planners, web surfers, coders—fail in cascades. A harmless-looking plan choice at t=3 can doom execution at t=27. Traditional “LLM-as-a-judge”: ...

September 12, 2025 · 4 min · Zelina
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From PDF to PI: Turning Papers into Productive Agents

We’ve all met the paper that promises the moon—then hands you a README, a maze of conda environments, and a prayer. Paper2Agent proposes a different contract: don’t read me, run me. By converting a research paper (and its repo) into a Model Context Protocol (MCP) server that any LLM agent can call, it turns methods into tools, figures into reproducible tests, and “future work” into executable prompts. This isn’t another “Papers with Code” link farm. It’s a pipeline that (1) mines the repo/tutorials, (2) builds a pinned environment, (3) extracts single‑purpose tools with clear I/O, (4) tests them until they match the paper’s outputs, and (5) deploys the lot as a remote MCP server. Hook that server to your favorite coding/chat agent and you get a paper‑specific copilot that can reproduce, explain, and extend the work. ...

September 12, 2025 · 4 min · Zelina
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HyFedRAG: Caching Privacy into Federated RAG

Centralized Retrieval-Augmented Generation (RAG) systems promise smarter answers, but they quietly assume one big, clean dataset in one place. Reality is far messier: hospitals, insurers, or financial groups each hold their own silo, often in incompatible formats, and none are willing—or legally allowed—to pool raw data. The HyFedRAG framework tackles this head‑on by making RAG federated, heterogeneous, and privacy‑aware. Edge First, Cloud Second Instead of centralizing records, HyFedRAG runs retrieval at the edge. Each hospital or business unit: ...

September 12, 2025 · 3 min · Zelina
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Pareto on Autopilot: Evolving RL Policies for Messy Supply Chains

TL;DR Most “multi‑objective” solutions collapse trade‑offs into a single number. MORSE keeps the trade‑offs alive: it evolves a Pareto front of policies—not just solutions—so operators can switch policies in real time as priorities shift (profit ↔ emissions ↔ lead time). Add a CVaR knob and the system becomes tail‑risk aware, reducing catastrophic outcomes without babysitting. Why this matters (for operators & P&L owners) Supply chains live in tension: service levels vs working capital, speed vs emissions, resilience vs cost. Traditional methods either: ...

September 12, 2025 · 4 min · Zelina
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Graph and Circumstance: Maestro Conducts Reliable AI Agents

When agent frameworks stall in the real world, the culprit is rarely just a bad prompt. It’s the wiring: missing validators, brittle control flow, no explicit state, and second-hop retrieval that never gets the right handle. Maestro proposes something refreshingly uncompromising: optimize both the agent’s graph and its configuration together, with hard budgets on rollouts, latency, and cost—and let textual feedback from traces steer edits as much as numeric scores. ...

September 11, 2025 · 5 min · Zelina
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Mind the Gap: How OSC Turns Agent Chatter into Compound Intelligence

Multi‑agent LLMs work great on paper and go sideways in practice. We over‑select experts, flood the channel with verbose thoughts, and then pray a meta‑LLM can stitch it all together. OSC (Orchestrating Cognitive Synergy) proposes a missing middle: a learned orchestration layer that constantly models what each agent knows, spots “cognitive gaps,” and then tells agents how to talk—what to say, to whom, and at what level of detail—before the aggregator votes. ...

September 11, 2025 · 4 min · Zelina