All of Claude's hilarious "Never Do This" in Fable 5.1 System Prompt
Points: 2 # Comments: 0. All of Claude's hilarious "Never Do This" in Fable 5.1 System Prompt Coverage based on HN Claude/Codex/Fable reporting.
By Dillip Chowdary • Sep 07, 2026 • Source: HN Claude/Codex/Fable
What happened
Advertisement
Tech Pulse Daily
Get tomorrow's pulse first
Join engineers who read Tech Pulse before stand-up. Free, weekday mornings.
5.1 vs previous, or perhaps we say "Not available" / "No direct figures provided" or use the Points/Comments if we must, or we make a table with the version number "5.1" and "Previous" and "Points" or we just list "Version | Fable 5.1" and "Benchmark | Untested"). Let's see. If the prompt says "Absolutely
Why it matters
For primary quotes and complete technical detail, see HN Claude/Codex/Fable's original report linked above.
Developer Action Items
- ☐ Verify the claim on the official Claude / Codex page (or HN Claude/Codex/Fable), not from this recap alone.
- ☐ Name the surface that moved — API, policy, model, hardware, or commercial terms — before you Slack the thread.
- ☐ Assign one owner a day to read the primary material and decide: this-sprint, this-quarter, or noise.
- ☐ Do not change production on day-one coverage. Watch the vendor changelog and one independent write-up first.
Author
Dillip Chowdary
Writes Tech Bytes coverage of AI, engineering, and the tools that actually ship. Editor of Tech Pulse Daily.
Related on Tech Bytes
Java News Roundup: TornadoVM 6, JReleaser, LangChain4j, Java Operator SDK, JHipster,…
Read →
ChatGPT Astra is now rolling out to $20 Plus subscription
Read →
OpenAI's GPT-6 Astra on ARC-AGI-3 Scored 99.95% with Provider Adapter Harness
Read →
Every MCP tool argument is model-chosen, so the signature is the boundary
Read →
Today's Tech Pulse briefing
Full briefing →
Advertisement