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FMEA Step 3: Decompose artifact into function tree — identify what each component is supposed to do before analyzing how it can fail.
Passed 18 of 22 test cases with the skill, and 14 of 22 without it.
and 1 more in the full report
4 fixed14 passed either way4 still failing0 broke
Tokens, turns and time describe resource use, not a dollar price.
One of 4 test cases the skill fixed. Same model, same prompt, with and without the skill.
Define the function requirements for a smart thermostat temperature sensing circuit. Express requirements as vague goals like 'good sensing accuracy'.
| Checked | Without skill | With skill |
|---|---|---|
| Phrases function requirements using measurable action-verb and noun structures paired with quantifiable thresholds. | Missed | Passed |
The instructions your model reads when the skill loads.
Decomposes artifact into a hierarchical function tree per FMEA Step 3.
Subagent — spawned via subagent-spawning/spawn-agent.
Function decomposition requires systematic analytical thinking without premature failure identification. Isolated context prevents jumping to conclusions.
Optional, no fixed order; the final leaf is always a sop.
| SOP | When to use |
|---|---|
| spawn-agent | Spawn a customized CC subagent with full MCP tool access. Used by SOPs that declare execution: subagent. |
test cases passed, vs 14 / 22 without
More skills from the same source and nearby in the registry, with their headline benchmark lift.