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A simple weekly checklist beside a custom AI agent with pass and fail marks on ten test cases

guides

October 25, 2026

Artem Vysotsky

How to Make an AI Agent That Still Works Next Month: A Failure Log, a Weekly Regression Test, and a Model-Swap Check

Most guides on how to make an AI agent stop at launch. This one covers day two onward: a failure log, a 10-case weekly regression test, a pass/fail threshold table, a model-swap check, and a when-to-retire checklist.

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Explore our collection of articles covering AI tools, productivity tips, and industry insights.

Best AI Image Generator in 2026: Which One Wins for Product Shots, Text-Heavy Graphics, Social Posts, and Illustration

Most "best AI image generator" lists are brand parades with cherry-picked samples. Here's a job-based sort, a four-point rubric, a 15-minute same-prompt test, and the retry math behind cost per usable image.

Four AI agent task cards for research, inbox, coding and sales ops, each with a reliability score checklist

Best AI Agents in 2026: Which Ones Actually Finish the Job (Research, Inbox, Coding, Sales Ops) and When to Build Your Own

Most "best AI agents" lists are brand parades with demo videos. Here's a four-point reliability rubric, agent types sorted by the job they finish, a buy-vs-build table, a 20-minute same-task test, and a custom agent walkthrough.

Writingmate model picker showing newly added models alongside a weekly shipping summary

product-updates

What Shipped This Week: Four New Models and a Fix for Deleting Chats Mid-Reply

Four new models landed in Writingmate this week, deleting a chat mid-reply no longer errors, and refreshed blog posts keep their original hero images. A short, honest recap.

$Three AI subscription strategies compared side by side: one vendor plan, stacked plans, and a multi-model platform with a monthly cost tally$

Best AI Subscription in 2026: One Plan, Stacked Plans, or a Multi-Model Platform? Monthly Cost Math by User Type

Most "best AI subscription" lists rank brands. This one compares three buying strategies for a solo writer, developer, student and small team, with monthly cost math, a lock-in checklist, a cancel-one audit and a 10-minute test.

$Five business departments connected to a single shared AI workspace instead of separate tool subscriptions$

AI Tools for Business in 2026: A Department-by-Department Stack, Seat-Cost Math, and a One-Week Pilot

Most "AI tools for business" lists are brand parades. Here's a five-department stack, per-seat cost math for a 10-person team, a data-handling checklist, and a one-week pilot with a pass/fail scorecard.

Flint release card for Writingmate users

Flint Is on Writingmate: Testing Agentic Coding and Tool Work

Flint is available in Writingmate. Here is how to evaluate it for agentic coding, tool-use, research, and long-horizon task work.

AI Singing Voice Generator: 10 Tools Compared article cover

AI Singing Voice Generator: 10 Tools Compared

Compare 10 AI singing voice generators for vocals, covers, and full songs, with practical guidance on features, limitations, and licensing.

Best AI Video Generator in 2026: Which One Wins for Social Ads, Product Demos, Explainers, and Cinematic B-Roll

Most "best AI video generator" lists are brand parades. This one sorts Kling, Veo, Seedance, Hailuo, Luma, Runway and PixVerse by job, adds a three-prompt rubric, and shows the retry math behind cost per usable clip.

A buyer's scorecard comparing AI agent platforms on model choice, tools, guardrails and pricing

AI Agent Platform in 2026: How to Choose One (Model Access, Tools, Guardrails, Pricing) Before You Commit

Most agent platform roundups list vendors. Here's a six-point buyer's scorecard, a build-vs-platform table, a lock-in checklist, and a one-hour pilot you can run on two platforms before paying.

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