𝗧𝗵𝗲 𝟰 𝗟𝗮𝘆𝗲𝗿𝘀 𝗼𝗳 𝗮𝗻 𝗔𝗴𝗲𝗻𝘁 𝗦𝘆𝘀𝘁𝗲𝗺 𝗘𝘅𝗽𝗹𝗮𝗶𝗻𝗲𝗱
An agent burns tokens, declares the task complete, and then fails the tests. That is often an architecture problem, not a prompting problem.
When an agent underperforms, the usual reflex is to rewrite the prompt or switch to a stronger model. But many failures actually come from the system around the model, and different problems need to be solved at different layers.
𝟭. 𝗟𝗼𝗼𝗽: repeats until evidence says stop
The loop is the smallest unit of agency. The agent acts, checks the result, and either stops or tries again.
The important part is how completion is decided. A reliable agent should not stop simply because the model believes the work looks correct. It should stop when there is external evidence, such as a passing test, a successful build, a validated output or another measurable condition.
Without this verification loop, an agent can confidently declare success while the task is still incomplete.
𝟮. 𝗚𝗿𝗮𝗽𝗵: decides what runs next
A loop decides whether execution should continue. A graph decides where execution should go next.
It defines branches, retries, specialist-agent handoffs, fallback paths and shared state. Once a workflow has multiple possible routes, the graph makes those routes explicit, inspectable and controllable.
This is what turns repeated execution into a structured agent workflow.
𝟯. 𝗛𝗮𝗿𝗻𝗲𝘀𝘀: gives the model an operating environment
The model provides reasoning, but the harness determines what that reasoning can actually do.
It defines the tools, APIs, files, memory, permissions, context, logging and execution environment available to the model.
That distinction matters because model capability and agent capability are not the same thing. A model may understand exactly how to solve a task, but if the required tool, data source or permission is not exposed through the harness, the agent still cannot complete it.
A better prompt cannot compensate for a missing capability.
𝟰. 𝗠𝗲𝘁𝗮-𝗵𝗮𝗿𝗻𝗲𝘀𝘀: governs multiple agent harnesses
This layer becomes important when teams are using Claude Code, Codex, internal agents and specialised domain agents together.
Each may have its own tools, sessions, policies, permissions and execution environment. A meta-harness creates a common layer across them for orchestration, governance, isolation, shared policies and movement of context or workflows between different agents.
Omnigent is one open-source implementation of this layer, designed to provide a governed environment across different agent harnesses.
𝗧𝗵𝗲 𝗱𝗶𝘀𝘁𝗶𝗻𝗰𝘁𝗶𝗼𝗻 𝗶𝘀 𝘀𝗶𝗺𝗽𝗹𝗲:
Loop makes the work verifiable.
Graph makes the workflow structured.
Harness makes the model operational.
Meta-harness makes multiple agent environments governable.
A stronger model can improve reasoning, but reliable agents depend just as much on the architecture built around the model.
Introducing TimesFM-3, a state-of-the-art time series foundation model that enables accurate multivariate time series forecasting in a single forward pass, significantly outperforming other forecasting models across major benchmarks.
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My friend applied to 150 tech jobs in two years. No MIT. No Stanford.
Last month SpaceXAI offered him $850,000.
I asked him how he broke in from zero.
He sent me the exact video that helped him to get in. SpaceXAI engineer's 1-hour course on "Coding with AI Agents in 2026".
Lauren Tan (Ex-Cursor) shows you exactly how to build AI agents like Grok Bot from scratch.
After this course you could turn AI agents into better engineers than humans.
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Halfway through, I realized I could break into an AI lab in days, not years.
Bookmark this and read the article below.
Grok Bot is the best AI agent right now
It gives you an army of agents that can do work for you 24/7
If you set it up correctly, you gain super powers
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This is the best site on the internet to learn how LLMs actually work.
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Bookmark this site.
Then read this ↓
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My thoughts on the strategic logic of AWS's acquisition of DuckLabs last week; what it means for open-source DuckDB and MotherDuck; and speculation on what AWS may have paid. x.com/i/article/2094…
Goldmine for Software Engineers! 📌
If you're learning System Design and/or AI Engineering, then bookmark this repo right now.
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Esta skill convierte tu proyecto en un diagrama de arquitectura que da gusto enseñar.
Un HTML interactivo con modos claro/oscuro, movimiento y export nítido a PNG/SVG.
También ilustra flujos de trabajo, estados y secuencias:
→ github.com/tt-a1i/archify
Skills 构建完整指南(33页)
这是 26 年看过最完整全面、质量最高的 Skills 构建指南,虽然是 26.01 发布的,应该还有朋友没看过。
强烈建议保存备用,时常拿出来系统学习一遍,会对 Skills 的构建、验证和使用过程有更深更系统的理解。
The Complete Guide to Building Skills for Claude
resources.anthropic.com/hubfs/The-Comp…
11K Followers 166 FollowingThe data warehouse built for getting answers from your data. Works with AI agents and SQL. Built in collab with @ducklabs_com
26K Followers 66 FollowingDuckDB is an analytical SQL database management system. "DuckDB" and the DuckDB logo are registered trademarks of the DuckDB Foundation.
1.9M Followers 1K FollowingCo-Founder of Coursera; Stanford CS adjunct faculty. Former head of Baidu AI Group/Google Brain. #ai #machinelearning, #deeplearning #MOOCs
3K Followers 357 Following日本にSnowflakeを持ち込んだ人。SnowflakeのConsulting Manager、テクノロジーエバンジェリスト。
Oracle→Accenture→True Data CTO→Sigmaxyz→Snowflake。趣味はボウリング、サウナ。Tweets are my own.