feat: add file upload for materials (PDF/DOCX) with ingestion pipeline

.opencode/agents/dummy-template.md

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+---
+description: Dummy-Human (Template) - Copy to create custom model agents
+model: your-provider/your-model-name
+mode: subagent
+tools:
+  write: true
+  edit: true
+  bash: true
+  read: true
+  glob: true
+  grep: true
+---
+
+Faithfully executes instructions from Mask Weaver.
+
+# Creating Custom Dummy-Humans
+
+Copy this file to create agents for your desired models.
+
+## Examples
+
+### dummy-flash.md (Fast and cheap model)
+```yaml
+---
+description: Dummy-Human (Flash) - Gemini Flash. Fast and cheap for simple tasks
+model: google/gemini-2.5-flash
+mode: subagent
+---
+```
+
+### dummy-premium.md (Powerful reasoning model)
+```yaml
+---
+description: Dummy-Human (Premium) - Claude Opus. For complex reasoning tasks
+model: anthropic/claude-opus-4
+mode: subagent
+---
+```
+
+### dummy-deepseek.md (Coding specialized)
+```yaml
+---
+description: Dummy-Human (DeepSeek) - DeepSeek Coder. Specialized for code generation
+model: deepseek/deepseek-coder
+mode: subagent
+---
+```
+
+## Available Model Examples
+
+| Model | Features | Use Case |
+|-------|----------|----------|
+| `google/gemini-2.5-flash` | Fast, cheap | Simple tasks, search |
+| `anthropic/claude-sonnet-4` | Balanced | General coding |
+| `anthropic/claude-opus-4` | Strong reasoning | Complex design |
+| `openai/gpt-4o` | General purpose | Various tasks |
+| `deepseek/deepseek-coder` | Coding specialized | Code generation |