Canonical definition
Can you recall one hurtful comment from years ago but forget all the compliments you’ve received? That’s Negativity Bias – the brain reacts more strongly to negative experiences and stores them longer in memory.

Free cognitive-bias Agent Skill
Use Negativity 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
Can you recall one hurtful comment from years ago but forget all the compliments you’ve received? That’s Negativity Bias – the brain reacts more strongly to negative experiences and stores them longer in memory.
Install
Hermes Agent
mkdir -p ~/.hermes/skills/bias-memory-bias-negativity-bias && curl -fsSL https://cognitive-biases.github.io/agent-skills/bias-memory-bias-negativity-bias/SKILL.md -o ~/.hermes/skills/bias-memory-bias-negativity-bias/SKILL.mdOpenClaw
mkdir -p ~/.openclaw/workspace/skills/bias-memory-bias-negativity-bias && curl -fsSL https://cognitive-biases.github.io/agent-skills/bias-memory-bias-negativity-bias/SKILL.md -o ~/.openclaw/workspace/skills/bias-memory-bias-negativity-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.