**Generated:** 2026-01-09T15:38:00+09:00

**Commit:** 0581793

| Orchestrator | `src/hooks/sisyphus-orchestrator/` | Main orchestration hook (660 lines) |

- **Testing**: BDD comments `#given/#when/#then`, TDD workflow (RED-GREEN-REFACTOR)

| Sisyphus | anthropic/claude-opus-4-5 | Primary orchestrator |

bun test # Run tests (76 test files, 2559+ BDD assertions)

| `src/agents/orchestrator-sisyphus.ts` | 1484 | Orchestrator agent, complex delegation |

| `src/agents/prometheus-prompt.ts` | 982 | Planning agent system prompt |

| `src/auth/antigravity/fetch.ts` | 798 | Token refresh, URL rewriting |

| `src/auth/antigravity/thinking.ts` | 755 | Thinking block extraction |

| `src/cli/config-manager.ts` | 725 | JSONC parsing, env detection |

| `src/hooks/sisyphus-orchestrator/index.ts` | 660 | Orchestrator hook impl |

| `src/agents/sisyphus.ts` | 641 | Main Sisyphus prompt |

| `src/tools/lsp/client.ts` | 612 | LSP protocol, JSON-RPC |

| `src/features/background-agent/manager.ts` | 608 | Task lifecycle |

| `src/auth/antigravity/response.ts` | 599 | Response transformation, streaming |

| `src/hooks/anthropic-context-window-limit-recovery/executor.ts` | 556 | Multi-stage recovery |

| `src/index.ts` | 548 | Main plugin, all hook/tool init |

- **Testing**: Bun native test (`bun test`), BDD-style `#given/#when/#then`, 76 test files

AI agent definitions for multi-model orchestration. 7 specialized agents: Sisyphus (orchestrator), oracle (read-only consultation), librarian (research), explore (grep), frontend-ui-ux-engineer, document-writer, multimodal-looker.

| Agent | Default Model | Fallback | Purpose |

|-------|---------------|----------|---------|

| Sisyphus | anthropic/claude-opus-4-5 | - | Primary orchestrator with extended thinking |

| oracle | openai/gpt-5.2 | - | Read-only consultation. High-IQ debugging, architecture |

| librarian | opencode/glm-4.7-free | - | Docs, OSS research, GitHub examples |

| explore | opencode/grok-code | google/gemini-3-flash, anthropic/claude-haiku-4-5 | Fast contextual grep |

| frontend-ui-ux-engineer | google/gemini-3-pro-preview | - | UI/UX code generation |

| document-writer | google/gemini-3-pro-preview | - | Technical writing |

| multimodal-looker | google/gemini-3-flash | - | PDF/image analysis |

1. Create `src/agents/my-agent.ts`:

```typescript

import type { AgentConfig } from "@opencode-ai/sdk"

export const myAgent: AgentConfig = {

model: "provider/model-name",

temperature: 0.1,

system: "Agent system prompt...",

tools: { include: ["tool1", "tool2"] }, // or exclude: [...]

}

```

2. Add to `builtinAgents` in `src/agents/index.ts`

3. Update `types.ts` if adding new config options

| Option | Type | Description |

|--------|------|-------------|

| model | string | Model identifier (provider/model-name) |

| temperature | number | 0.0-1.0, most use 0.1 for consistency |

| system | string | System prompt (can be multiline template literal) |

| tools | object | `{ include: [...] }` or `{ exclude: [...] }` |

| top_p | number | Optional nucleus sampling |

| maxTokens | number | Optional max output tokens |

`createBuiltinAgents()` in utils.ts handles model fallback:

1. Check user config override (`agents.{name}.model`)

2. Check installer settings (claude max20, gemini antigravity)

3. Use default model

**Fallback order for explore**:

- If gemini antigravity enabled → `google/gemini-3-flash`

- If claude max20 enabled → `anthropic/claude-haiku-4-5`

- Default → `opencode/grok-code` (free)

- **High temperature**: Don't use >0.3 for code-related agents

- **Broad tool access**: Prefer explicit `include` over unrestricted access

- **Monolithic prompts**: Keep prompts focused; delegate to specialized agents

- **Missing fallbacks**: Consider free/cheap fallbacks for rate-limited models

- **build-prompt.ts**: Base prompt for build agents (OpenCode default + Sisyphus variants)

- **plan-prompt.ts**: Base prompt for plan agents (legacy)

- **prometheus-prompt.ts**: System prompt for Prometheus (Planner) agent

- **metis.ts**: Metis (Plan Consultant) agent for pre-planning analysis

Used by `src/index.ts` when creating Builder-Sisyphus and Prometheus (Planner) variants.

| fetch.ts | URL rewriting, token injection, retries |

| thinking.ts | Extract `<antThinking>` blocks |

| response.ts | Streaming SSE parsing |

| oauth.ts | Browser-based OAuth flow |

| token.ts | Token persistence, expiry |

1. **Intercept**: fetch.ts intercepts Anthropic/Google requests

2. **Rewrite**: URLs → Antigravity proxy endpoints

3. **Auth**: Bearer token from stored OAuth credentials

4. **Response**: Streaming parsed, thinking blocks extracted

5. **Transform**: Normalized for OpenCode

- Multi-account (up to 10 Google accounts)

- Auto-fallback on rate limit

- Thinking blocks preserved

- Antigravity proxy for AI Studio access

- Direct API calls (use fetch interceptor)

- Tokens in code (use token.ts storage)

- Ignoring refresh (check expiry first)

- Blocking on OAuth (always async)