113 lines
4.1 KiB
Markdown
113 lines
4.1 KiB
Markdown
---
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name: fusion
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description: >-
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Answer a hard question by fanning it out to a PANEL of models running in parallel —
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each answering independently, none seeing the others' work — then having the judge model
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evaluate every response into a structured analysis (consensus, contradictions, partial
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coverage, unique insights, blind spots) and write a final answer grounded in it.
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Panel options:
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opus4.8-4.8 — two independent Opus 4.8 runs (no external CLI needed)
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opus4.8-gpt5.5 — Opus 4.8 + GPT-5.5 via codex CLI
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opus4.8-gpt5.5-gemini — Opus 4.8 + GPT-5.5 + Gemini 3.1 Pro
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sonnet-haiku-opus — Sonnet 4.6 drafts, Haiku checks, Opus fuses
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openrouter-fusion — single call to OpenRouter Fusion API
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The judge (always Opus 4.8 unless overridden) writes the final answer.
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The pipeline cannot be reversed: panelists cannot call back out to spawn the judge.
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Best for: high-stakes research, architectural decisions, debugging,
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and any question where being confidently wrong is expensive.
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---
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# Fusion Skill
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## Mechanism
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Fusion turns one prompt into a panel. The question goes to several models **at the same time**,
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each answering independently — with full tool access and no knowledge of the others. Then the
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judge reads every answer, extracts the structure of the panel's reasoning (what they agree on,
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where they conflict, what only one saw, what they all missed), and writes a final answer
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grounded in that analysis.
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The core principle is **independence, then synthesis**. Every panelist gets the task verbatim.
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No assigned "lenses" or personas — the diversity comes naturally from independent execution.
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## Procedure
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### Step 1: Fan Out Panel
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Dispatch the task to N panelists in parallel:
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```
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for each panelist in parallel:
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spawn sub-agent with clean context
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panelist receives: task (verbatim)
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panelist executes: research, tool calls, analysis
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panelist returns: full answer
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```
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### Step 2: Judge Analysis
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The judge (Opus 4.8) evaluates every panelist answer and produces a structured analysis:
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```
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Consensus: what all/most panelists agree on
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Contradictions: where panelists disagree (with resolution or flag)
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Partial: aspects only some panelists addressed
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Unique Insights: things only one panelist found
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Blind Spots: what no panelist addressed
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```
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### Step 3: Grounded Final Answer
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The judge writes the final answer, grounded in the analysis:
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```
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Synthesis of consensus into a coherent position
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Resolution of contradictions
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Incorporation of unique insights
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Acknowledgment of blind spots
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Actionable conclusion
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```
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## Panel Configurations
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| Slug | Panelists | Cost Savings vs Fable 5 |
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|------|-----------|------------------------|
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| opus4.8-4.8 | 2× Opus 4.8 (~$0.09) | ~40% cheaper |
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| opus4.8-gpt5.5 | Opus 4.8 + GPT-5.5 (~$0.12) | ~20% cheaper |
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| sonnet-haiku-opus | Sonnet + Haiku + Opus (~$0.06) | ~60% cheaper |
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| openrouter-fusion | OpenRouter Fusion compound (~$0.08) | ~50% cheaper |
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## CLI Usage
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```bash
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# Default panel (opus4.8-4.8)
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node dist/index.js fusion run "Complex research question"
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# Specific panel
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node dist/index.js fusion run "Design review" --panel sonnet-haiku-opus
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# OpenRouter Fusion API
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node dist/index.js fusion run "Architecture analysis" --openrouter
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# List available panels
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node dist/index.js fusion panels
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```
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## Integration with fable-agent
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This skill integrates with:
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- **FusionExecutor** (`src/examples/executors/fusion-executor.ts`) — PhaseExecutor-compatible
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- **OpenRouterFusionExecutor** (`src/examples/executors/openrouter-fusion-executor.ts`) — API-based fusion
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- **DynamicWorkflows.fusionPanel()** — workflow-level fusion dispatch
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- **CompoundStack** — fusion as a stakable layer
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- **Fable5PromptEngine** — tone/citation/refusal rules from leaked Fable 5 prompt
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## References
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- [fusion-fable](https://github.com/duolahypercho/fusion-fable) — original fan-out panel → judge pattern
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- [OpenRouter Fusion API](https://openrouter.ai) — compound model API
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- [Fable 5 leaked system prompt](https://github.com/elder-plinius/CL4R1T4S) — tone, citation, refusal patterns
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