Disclosure.
Today's issue is about what you choose to show — ads with labels, training data with opt-outs, comp lists in spreadsheet form, and 4,000 declassified UFO files in markdown.
Ads, with a label.
OpenAI is testing limited advertising inside ChatGPT, promising clear labelling, answer independence, and "strong privacy protections" to support free-tier access. Whether that survives contact with revenue targets is the test the next two quarters will run.
"Answers stay independent. Ads are clearly labelled. Privacy is preserved." — three claims a paid model would never have to make.
What ChatGPT learns about you — and what you can keep.
OpenAI walks through what it stores, what it strips before training, and how to opt your conversations out. The doc is specific enough to act on tonight, not just bookmark.
Stored. Conversation text, model responses, account metadata, and per-message feedback. Retention windows differ by tier; enterprise data is excluded from training by default.
Stripped. The training pipeline runs deduplication, classifier-based PII removal, and topic-based filtering before a single token reaches the next checkpoint.
Yours. Plus and Free users can disable "improve the model for everyone" in privacy settings; temporary chats skip retention entirely. Worth one minute, once.
Stop subtweeting your rivals.
Public competitor takedowns reach the people who already love you and inadvertently introduce the rival to everyone else. PostHog's playbook is the un-glamorous one: honest comparisons, bid on the keywords, and put the energy back in the product.
- Write the honest comparison page yourself; link to their docs.
- Bid on their brand keywords — quietly, not vindictively.
- Ship the missing feature; outcomes outlive screenshots.
- Praise them in public when they're right; readers notice.
Five real-time stacks, one sheet.
PostHog lines itself up against GA4, Plausible, Fathom, and Matomo on live dashboards, identified-user tracking, and replay. Read it once before you re-pick your default analytics — the picks have shifted since 2024.
| Tool | Live dash | Identified users | Replay | Self-host |
|---|---|---|---|---|
| PostHog | ● | ● | ● | ● |
| GA4 | ● | ○ | ○ | ○ |
| Plausible | ● | ○ | ○ | ● |
| Fathom | ● | ○ | ○ | ○ |
| Matomo | ● | ● | ○ | ● |
Watching the agents.A developer's handbook.
Sentry's guide to AI-agent monitoring is built for the people writing the agent loops, not for an auditor reading them after the fact. What to trace, what to alert on, and which compliance frameworks get it wrong.
Specs first, agents second.
A growing camp of engineers writes a markdown spec, hands it to Claude or Codex, and reviews the patch — not the prose. OpenSpec documents the workflow as a small, opinionated convention you can adopt this afternoon.
Genternet rewrites the web in real time.
A Chrome extension that intercepts whatever you load and regenerates it through a fast image model and Gemini Flash-Lite. Two cents a page, fully open source, and the gag is also the demo: the medium is no longer the message.
████ declassified UFO files, in markdown.
Denis Sergeevitch converted the U.S. government's released UFO archive — 4,000+ documents — into a clean markdown corpus and asked GPT-5.5 Pro to weigh in. Use it as a long-context reasoning eval; ignore the percentages.
Truth, as a growth strategy.
Bullas argues authenticity has graduated from brand attribute to competitive moat — and that performative messaging is now a measurable drag on growth. A useful pressure check on whatever copy you most recently published.
That's today.
Nine picks, six sources, one throughline: what you choose to show. Today's feed leaned on the official OpenAI and PostHog blogs, Sentry's engineering site, two Telegram channels, and a long-running marketing essayist.
- · OpenAI · openai.com/news
- · PostHog · posthog.com/blog
- · Sentry · blog.sentry.io
- · @seeallochnaya · t.me/seeallochnaya
- · @denissexy · t.me/denissexy
- · Jeff Bullas · jeffbullas.com