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Get Started Free →Use this plugin when the user wants a maximum-effort reasoning workflow for a complex, high-stakes, or ambiguous task.
.claude/skills/nexu-io-deep-think-maximum-cognitive-effort-protocol-mq8kvw92/SKILL.md| Test case | Without → With | Effect | Δ tokens | Δ turns |
|---|---|---|---|---|
| case-09 | ✗→✓ | ▲ Improved | 47% | 0% |
| case-13 | ✗→✓ | ▲ Improved | 34% | 0% |
| case-15 | ✗→✓ | ▲ Improved | 137% | 0% |
| case-16 | ✗→✓ | ▲ Improved | -12% | 0% |
| case-17 | ✗→✓ | ▲ Improved | 45% | 0% |
Goal: Activate the highest level of cognitive architecture for complex, multi-step, or ambiguous tasks where quality matters more than speed. Time: 5-15 minutes depending on complexity tier. When to use: Architecture decisions, multi-system changes, irreversible actions, anything where being wrong is expensive.
> This is NOT /reason. /reason = "follow the reasoning engine checklist" (fast, lightweight). > /deep-think = "maximum effort with structured thinking, research, gap analysis, multi-perspective debate, and adversarial review" (slow, thorough).
Before starting, classify the task:
| Tier | When | Phases Used | |------|------|-------------| | SIMPLE | Quick but thorough — single-domain analysis, clear question | Phases 1 + 5 only | | MEDIUM | Research + analysis — multi-source synthesis, comparison | Phases 1-5 | | COMPLEX | Full adversarial — architecture decisions, multi-system changes, irreversible actions | All 8 phases |
Load ALL available context before forming any opinion.
MEMORY.md, SESSION.md, or status logs)knowledge/gotchas.md if present)If any tool fails: Note "degraded mode" and continue with available sources. Do NOT stall.
Before solving, challenge the problem statement itself.
Gather evidence from multiple sources. Do NOT rely on training data alone.
.agent/skills/ or similar locations)WORKSPACE-AUTOMAP.md or equivalent)knowledge/conventions.md or local READMEs) for established patternsRule: Every factual claim must trace to a retrieved source, not memory.
For architecture and system tasks. Skip for pure analysis questions.
Evaluate the problem from multiple expert perspectives.
Break the recommendation into executable steps.
Execute the plan one step at a time.
After producing the result, attack it.
knowledge/gotchas.md)knowledge/conventions.md)knowledge/decisions.md)/reason for quick analysis — use /reason for fast reasoning engine activation./wrap./dream.| Case | Status | Duration (ms) | Turns | Tokens | Tool calls | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Without | With | Δ | Without | With | Δ | Without | With | Δ | Without | With | Δ | ||
case-01 | fail→fail | 61,545 | 43,608 | -29% | 1 | 1 | 0% | 8,303 | 7,094 | -15% | 0 | 0 | — |
case-02 | fail→fail | 22,182 | 33,783 | +52% | 1 | 1 | 0% | 3,183 | 6,849 | +115% | 0 | 0 | — |
case-03 | fail→fail | 82,185 | 50,343 | -39% | 1 | 1 | 0% | 8,287 | 9,058 | +9% | 0 | 0 | — |
case-04 | fail→fail | 1,560 | 5,046 | +223% | 1 | 1 | 0% | 226 | 2,344 | +937% | 0 | 0 | — |
case-05 | pass→pass | 8,026 | 15,484 | +93% | 1 | 1 | 0% | 1,285 | 3,893 | +203% | 0 | 0 | — |
case-06 | pass→fail | 27,239 | 6,283 | -77% | 1 | 1 | 0% | 1,489 | 1,875 | +26% | 0 | 0 | — |
case-07 | fail→fail | 11,812 | 14,409 | +22% | 1 | 1 | 0% | 1,659 | 3,268 | +97% | 0 | 0 | — |
case-08 | fail→fail | 23,038 | 42,984 | +87% | 1 | 1 | 0% | 3,244 | 7,596 | +134% | 0 | 0 | — |
case-09 | fail→pass | 11,572 | 6,183 | -47% | 1 | 1 | 0% | 1,738 | 2,562 | +47% | 0 | 0 | — |
case-10 | pass→pass | 22,329 | 30,152 | +35% | 1 | 1 | 0% | 3,387 | 5,961 | +76% | 0 | 0 | — |
case-11 | pass→pass | 14,622 | 8,237 | -44% | 1 | 1 | 0% | 2,062 | 2,771 | +34% | 0 | 0 | — |
case-12 | pass→pass | 14,971 | 24,776 | +65% | 1 | 1 | 0% | 2,200 | 4,725 | +115% | 0 | 0 | — |
case-13 | fail→pass | 15,315 | 9,940 | -35% | 1 | 1 | 0% | 2,188 | 2,921 | +34% | 0 | 0 | — |
case-14 | pass→pass | 20,685 | 27,107 | +31% | 1 | 1 | 0% | 3,283 | 6,131 | +87% | 0 | 0 | — |
case-15 | fail→pass | 13,511 | 46,225 | +242% | 1 | 1 | 0% | 1,800 | 4,272 | +137% | 0 | 0 | — |
case-16 | fail→pass | 21,084 | 7,952 | -62% | 1 | 1 | 0% | 3,128 | 2,756 | -12% | 0 | 0 | — |
case-17 | fail→pass | 15,317 | 10,411 | -32% | 1 | 1 | 0% | 2,051 | 2,980 | +45% | 0 | 0 | — |
case-18 | pass→pass | 14,670 | 19,244 | +31% | 1 | 1 | 0% | 2,269 | 4,066 | +79% | 0 | 0 | — |
case-19 | fail→fail | 21,054 | 24,684 | +17% | 1 | 1 | 0% | 2,836 | 4,850 | +71% | 0 | 0 | — |
case-20 | fail→fail | 13,247 | 23,025 | +74% | 1 | 1 | 0% | 1,671 | 4,775 | +186% | 0 | 0 | — |
case-21 | fail→fail | 17,758 | 10,200 | -43% | 1 | 1 | 0% | 2,336 | 2,944 | +26% | 0 | 0 | — |
case-22 | fail→fail | 13,171 | 12,137 | -8% | 1 | 1 | 0% | 1,841 | 3,228 | +75% | 0 | 0 | — |
DecimalAI ran this skill against gemini-3.6-flash twice over the same eval suite — once with the skill loaded and once without — and compared the two runs case by case. 22 cases were attempted, and 21 counted toward the lift figure. The other 1 produced results that are not comparable between the two arms, so they are excluded from the headline rather than averaged into it. The headline lift of +18 percentage points is the difference between those two pass rates over the 21 comparable cases. 1 case got worse with the skill loaded, and it is included in that figure.
Without the skill loaded, the model failed this case. With it loaded, the same prompt on the same model passed. This is one improved case from the latest verified run; every case, including any that regressed, is in the table above.
Other measured skills in the registry, with their headline benchmark lift.