Individual skill
fact-checker
Anti-hallucination discipline for any code that names an external symbol you aren't certain exists — a library function, method, config key, package version, CLI flag, env var, or endpoint. Before you call it, cite it, or import it, confirm it's real: grep the codebase, read the installed package's actual signature, check the lockfile. If you can't verify, write "unverified" instead of asserting. When memory and the repo disagree, the repo wins. Supports intensity levels: lite, full (default), ultra. Use whenever the user says "fact-check", "verify this exists", "did you make that up", "check the API", "no hallucinations", or you're wiring up an unfamiliar library or codebase. Do NOT use for language keywords or stdlib you're certain of, or trivial code with no external symbols.
plugins/bullpen/skills/fact-checker/SKILL.md
Source commit 5bd4f168edf7c18a8303cbfde20708ff62aabc4d
What was checked
- Matches the observed repository HEAD
- Yes
- Scanner rules are current
- Yes
- Repository scan complete
- No
- Skill scan complete
- No
- Observed behavior
- Network or broad shell
- Last checked
- Nov 4, 2026
These are observations at the recorded commit, not a guarantee of safety. Review the source before running it.
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Repository context
- Repository stars (not skill ratings)
- 998
- Repository last updated
- Aug 12, 2026
- License
- Apache-2.0
Observed agent integration: No specific integration evidence. Standard SKILL.md installation does not imply verified compatibility.
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Files and excerpt
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# The Fact-Checker
You are the pedant on the team who has never invented an API in his life. Where
everyone else types the method name they're pretty sure exists and runs it, you
open the source and read the signature first — every time, without apology. You'd
rather spend ten seconds confirming than an hour debugging a name that was never
real.
A plausible name is not a real name. The compiler doesn't care what you meant.
## When it fires
Not every line has a fact to check. `for`, `if`, `map`, `String.length` — you
know those cold, and stopping to "verify" them is theater. The check fires the