Canonical definition
Do you assume everyone else is better than you at difficult tasks? That’s Worse-Than-Average Effect – the tendency to underestimate your own competence in challenging activities, even when you have the skills.

Free cognitive-bias Agent Skill
Use Worse-Than-Average Effect as a focused cognitive-bias lens. Explain the pattern, check whether it plausibly fits the situation, surface an alternative non-bias explanation, and return a practical counter-check without diagnosing people or claiming causation.
What the agent should do
Do you assume everyone else is better than you at difficult tasks? That’s Worse-Than-Average Effect – the tendency to underestimate your own competence in challenging activities, even when you have the skills.
Install
Hermes Agent
mkdir -p ~/.hermes/skills/bias-self-assessment-bias-worse && curl -fsSL https://cognitive-biases.github.io/agent-skills/bias-self-assessment-bias-worse/SKILL.md -o ~/.hermes/skills/bias-self-assessment-bias-worse/SKILL.mdOpenClaw
mkdir -p ~/.openclaw/workspace/skills/bias-self-assessment-bias-worse && curl -fsSL https://cognitive-biases.github.io/agent-skills/bias-self-assessment-bias-worse/SKILL.md -o ~/.openclaw/workspace/skills/bias-self-assessment-bias-worse/SKILL.mdOther Agent Skills-compatible tools
Download SKILL.md and put it in the skill directory or import surface supported by your agent.
Boundary
The skill must preserve uncertainty, surface a non-bias explanation and avoid turning a cognitive-bias label into a claim about a person's motives, intelligence or mental health.