Canonical definition
Do you see an object and think it can only be used for its intended purpose? That’s Functional Fixedness – the tendency to perceive an object only in its traditional role, ignoring other possible uses.

Free cognitive-bias Agent Skill
Use Functional Fixedness 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 see an object and think it can only be used for its intended purpose? That’s Functional Fixedness – the tendency to perceive an object only in its traditional role, ignoring other possible uses.
Install
Hermes Agent
mkdir -p ~/.hermes/skills/bias-cognitive-rigidity-functional-fixedness && curl -fsSL https://cognitive-biases.github.io/agent-skills/bias-cognitive-rigidity-functional-fixedness/SKILL.md -o ~/.hermes/skills/bias-cognitive-rigidity-functional-fixedness/SKILL.mdOpenClaw
mkdir -p ~/.openclaw/workspace/skills/bias-cognitive-rigidity-functional-fixedness && curl -fsSL https://cognitive-biases.github.io/agent-skills/bias-cognitive-rigidity-functional-fixedness/SKILL.md -o ~/.openclaw/workspace/skills/bias-cognitive-rigidity-functional-fixedness/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.