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Predrag's Playground

predr.ag

Predrag's Playground is a tech site on predr.ag, in English, funded by its readers: 21 people pay through GitHub Sponsors, as the platform publishes it.

A personal blog by software engineer Predrag Gruevski on compilers, query systems, software correctness, and talks about Trustfall.

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Latest posts

• Protecting the Rust standard library from accidental breakage2026-08-15
• The Self-Cancelling Subscription2026-04-01
• Exponential growth continued — cargo-semver-checks 2025 Year in Review2026-01-11
• Ghosts in the Compilation2025-10-31
• Unsoundness and accidental features in the <nobr><code>#[target_feature]</code></nobr> attribute2025-07-05
• XORry Not Sorry: The Most Amusing Security Flaws I've Discovered2025-04-01
• When is "this trait can be implemented" part of the trait's public API?2025-03-08
• "We never update unless forced to" — cargo-semver-checks 2024 Year in Review2025-01-21

From the site's feed, read 2026-10-21.

Pages

41 pages indexed; the pages that lead the site by its internal links:

Standing

Verified funding

• github_sponsors https://github.com/sponsors/obi1kenobiverified 2026-08-16

Badge

For the site's owner: a badge that says readers fund it, linked to this page. It shows the live figure, so it never goes stale; the count is the one the platform publishes.

HTML

<a href="https://readerfunded.com/site/predr.ag"><img src="https://readerfunded.com/badge/predr.ag.svg" alt="Reader-funded: 21 paying supporters on GitHub Sponsors, verified by ReaderFunded" height="20"></a>

Markdown

[![Reader-funded: 21 paying supporters on GitHub Sponsors, verified by ReaderFunded](https://readerfunded.com/badge/predr.ag.svg)](https://readerfunded.com/site/predr.ag)

Neighbourhood

Linked from 115 domains, links to 70; of the latter, the funded sites are shown. Funded sites first, then the sources that link to fewest other funded sites. Links as seen in the Common Crawl domain graph (cc-main-2026-aug-sep-oct), cut 2026-10-23: the pages crawled in a window of three months, not necessarily the site of today, and a page not crawled in that window leaves no link.

Similar funded sites

Sites the same sources link to, by cosine over the sets of linking domains. More.