Canonical definition
Do you remember the last words of a speaker better than the last lines of a book? That’s Modality Effect – spoken information is remembered differently than written, especially at the end of a list.

Free cognitive-bias Agent Skill
Use Modality 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 remember the last words of a speaker better than the last lines of a book? That’s Modality Effect – spoken information is remembered differently than written, especially at the end of a list.
Install
Hermes Agent
mkdir -p ~/.hermes/skills/bias-memory-bias-modality-effect && curl -fsSL https://cognitive-biases.github.io/agent-skills/bias-memory-bias-modality-effect/SKILL.md -o ~/.hermes/skills/bias-memory-bias-modality-effect/SKILL.mdOpenClaw
mkdir -p ~/.openclaw/workspace/skills/bias-memory-bias-modality-effect && curl -fsSL https://cognitive-biases.github.io/agent-skills/bias-memory-bias-modality-effect/SKILL.md -o ~/.openclaw/workspace/skills/bias-memory-bias-modality-effect/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.