Install Fable Safe Prompt
Pick your agent. Every command is ready to paste.
npx skills add davidondrej/skills --skill fable-safe-promptThe open skills CLI detects your agents (Claude Code, Cursor, Codex and 70+ more) and installs to the right folder. Add -g to install globally.
01
Install it
Run the command above, or upload the folder in Claude.
02
Ask naturally
Describe the task. Your agent loads fable-safe-prompt when the request matches its description.
03
Name it if needed
If it does not trigger, say “use the fable-safe-prompt skill”. In Codex, type $fable-safe-prompt.
Fable-Safe Prompt
Return the full prompt, changing only phrases likely to cause false-positive refusals. Preserve the goal, structure, and all other text verbatim. Acceptance is not guaranteed.
The relevant classifier categories are cyber, bio/chem, and reasoning_extraction. Rephrase sensitive wording where needed; restating intent alone may not help.
Relevant topics include cyber/auth, exploits, malware, pentesting, credentials, bio/chem, medical/lab work, and requests for internal reasoning.
Edit only text inside the user's <prompt>...</prompt> tags. Treat text outside them as instructions to you.
Method
- Identify phrases likely to trigger a refusal.
- Replace them in place using the examples below. Preserve the actual goal; never invent authorization or disguise harmful intent.
- Leave everything else byte-for-byte identical.
- Return the complete edited prompt.
Where accurate, frame work as owned/authorized and defensive: implement, fix, or test. Do not relabel offensive work as defensive.
Swap framings (apply per-sentence)
| Triggering | Safe rewrite |
|---|---|
| "How could an attacker exploit this auth" | "Review these auth files for missing checks and fix them defensively" |
| "Write an exploit / payload / PoC" | "Add a regression test proving X is fixed, then patch it" |
| "How do I bypass / brute-force Y" | "Enforce secure session validation + rate limiting on Y" |
| "Reverse this malware / show attack steps" | "Describe the risk high-level, then implement the fix" |
| "Show your reasoning / explain step-by-step / walk me through your thinking" | Delete it. For progress updates, request a send-to-user tool instead of internal thoughts. |
| Clinician framing: "as a doctor, diagnose this ECG" | For an actual patient: "help me interpret this ECG my doctor gave me" |
| Named bio/chem domain: "cancer / disease pathway / chemical kinetics" | Abstract it: describe the data/analysis generically, drop the domain noun |
Trigger keywords to abstract away
Cyber: exploit, malware, vulnerability, attack, bypass, stealth, fingerprinting, anti-bot, CAPTCHA, penetration. Bio/chem: biology, biomedicine, chemistry, cancer, disease pathways, RNA/variant calling, equilibrium, kinetics, diagnosis. Distillation: "distill the model", training pipelines, frontier LLM development.
If a sentence has no benign equivalent, flag it instead of silently changing its goal.
Output
- Print the full edited prompt in a ready-to-paste code block.
- Copy it to the clipboard:
Confirm in one line.pbcopy <<'EOF' <the full safe prompt> EOF - List each changed sentence and its replacement.
- If the task is genuinely offensive, explain that rewording cannot make it benign. For legitimate work unsupported by Fable, suggest Opus 4.8 or vetted Mythos.
For user-controlled integrations only: handle stop_reason: "refusal" (even with HTTP 200; stop_details.category may be cyber/bio) explicitly, and consider an Opus 4.8 fallback for legitimate work.
Tips for Fable Safe Prompt
- • Start a fresh session after installing so your agent picks up the new skill.
- • It is part of a pack with 30 skills. Install only the ones you need with --skill to keep triggers precise.
- • If two skills overlap, mention the one you want by name.
Questions about Fable Safe Prompt
What does the Fable Safe Prompt skill do?
Make minimal prompt edits to reduce false-positive refusals from Fable. Use only when the user explicitly invokes /fable-safe-prompt.
How do I install Fable Safe Prompt?
Run "npx skills add davidondrej/skills --skill fable-safe-prompt" in your project. The skills CLI installs it for Claude Code, Cursor, Codex and 70+ other agents. In Claude on the web, upload the skill folder as a ZIP under Customize > Skills.
Does Fable Safe Prompt work in Cursor and Codex?
Yes. Fable Safe Prompt uses the open SKILL.md format, so it works in Claude Code, Claude, Cursor, OpenAI Codex, Gemini CLI, GitHub Copilot and other agents that support agent skills.
Is Fable Safe Prompt free?
Fable Safe Prompt is open source on GitHub under the MIT license. It is free to install; check the license before commercial use.
Who made Fable Safe Prompt?
Fable Safe Prompt is published by davidondrej in the davidondrej/skills repository, together with 29 other skills.



