Canonical definition
Do you feel like your group is diverse, but other groups are all the same? That’s Outgroup Homogeneity Bias – the tendency to see members of your own group as individuals, while viewing outsiders as uniform.

Free cognitive-bias Agent Skill
Use Outgroup Homogeneity Bias 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 feel like your group is diverse, but other groups are all the same? That’s Outgroup Homogeneity Bias – the tendency to see members of your own group as individuals, while viewing outsiders as uniform.
Install
Hermes Agent
mkdir -p ~/.hermes/skills/bias-conformity-bias-outgroup-homogeneity-bias && curl -fsSL https://cognitive-biases.github.io/agent-skills/bias-conformity-bias-outgroup-homogeneity-bias/SKILL.md -o ~/.hermes/skills/bias-conformity-bias-outgroup-homogeneity-bias/SKILL.mdOpenClaw
mkdir -p ~/.openclaw/workspace/skills/bias-conformity-bias-outgroup-homogeneity-bias && curl -fsSL https://cognitive-biases.github.io/agent-skills/bias-conformity-bias-outgroup-homogeneity-bias/SKILL.md -o ~/.openclaw/workspace/skills/bias-conformity-bias-outgroup-homogeneity-bias/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.