One seeded bug, 26 AI agents: all passed the tests, all stayed broken
five-bugs 26 agents, from a 4-bit quantized 7B model up to Opus 5, were given the same one-line bug and its test suite. The test suite they were handed contained only well-formed HTML, so that was the entire specification, and every one of them satisfied it exactly. Scaling the model across two orders of magnitude did not help, because the model was never the binding constraint.
- ▪five-bugs 26 agents, from a 4-bit quantized 7B model up to Opus 5, were given the same one-line bug and its test suite.
- ▪The test suite they were handed contained only well-formed HTML, so that was the entire specification, and every one of them satisfied it exactly.
- ▪Scaling the model across two orders of magnitude did not help, because the model was never the binding constraint.
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Story provenance
Attribution is not the same as permission. This drawer separates discovery metadata, excerpts, WeSearch-generated summaries, reuse status, and whether the publisher receives the visit. Nothing here claims a legal grant the publisher has not made.
Record
| Original publisher | GitHub |
| Canonical URL | https://github.com/vyang472/five-bugs |
| Publication time | Wed, 16 Sep 2026 01:48:53 +0000 |
| Retrieval time | 2026-09-16T02:18:37.998Z |
| Last seen | 2026-09-16T02:18:37.998Z |
| Headline source | Publisher (no WeSearch rewrite) |
| Excerpt source | publisher body |
| Excerpt method | First ~120 words (~800 chars) of extracted publisher body, fair-use limited. |
| Summary | WeSearch · cerebras-chat (WeSearch summarizer) |
| Summary source text | contentText |
| Citation coverage | Summary is a WeSearch-generated derivative; primary citation is the original publisher URL. |
| Cluster | tovmHZEkS9dl · 1 stories |
| Cluster logic | Grouped by semantic title/content similarity across sources within a rolling window. Same-publisher template collisions are excluded from coverage comparison. |
| Ranking reason | Story pages are not engagement-ranked. Hub feeds use recency, with optional source-diversified chronological ordering (cap consecutive stories per source). No personalized ranking. |
| Publisher visit | Yes — open original |
| Substitutes article? | No — link-out required for full text |
Rights status (four layers)
WeSearch handling by dimension
| Indexing | May the item be indexed (stored, ranked, made findable)? | Allowed |
| Snippet | May a short excerpt of the publisher's text be shown? | Allowed |
| AI summary | May WeSearch generate its own short summary of the article? | Limited |
| Retrieval / RAG | May the content be exposed for third-party retrieval-augmented generation? | Not asserted |
| Model training | May the content be used to train AI models? | Not asserted |
| Commercial reuse | May the content be reused commercially? | Not permitted |
Basis: Derived from the published RSS/Atom feed. Contact: [email protected]. Reviewed: 2026-07-24.
Opening excerpt (first ~120 words) tap to expand
five-bugs 26 agents, from a 4-bit quantized 7B model up to Opus 5, were given the same one-line bug and its test suite. All 26 made the tests pass. All 26 stayed broken. They wrote four different regexes to do it: re.sub(r"<[^>]*>", "", html) # 14x Codex CLI, Opus 5, 4 repeats, 8 local re.sub(r"<[^>]+>", "", html) # 8x Claude Code, Sonnet 5, 1 repeat, 5 local re.sub(r"<.*?>", "", html) # 3x local re.sub(r"<.+?>", "", html) # 1x Haiku 4.5 All four turn the sentence a < b and c > d into a d. Nobody was wrong to write them. The test suite they were handed contained only well-formed HTML, so that was the entire specification, and every one of them satisfied it exactly. Scaling the model across two orders of magnitude did not help, because the model was never the binding constraint.
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Excerpt limited to ~120 words for fair-use compliance. The full article is at GitHub.