# Configuration Reference

Complete reference for Oh My OpenCode plugin configuration. During the rename transition, the runtime recognizes both `oh-my-openagent.json[c]` and legacy `oh-my-opencode.json[c]` files.

---

## Table of Contents

- [Getting Started](#getting-started)
  - [File Locations](#file-locations)
  - [Quick Start Example](#quick-start-example)
- [Core Concepts](#core-concepts)
  - [Agents](#agents)
  - [Categories](#categories)
  - [Model Resolution](#model-resolution)
- [Task System](#task-system)
  - [Background Tasks](#background-tasks)
  - [Sisyphus Agent](#sisyphus-agent)
  - [Sisyphus Tasks](#sisyphus-tasks)
- [Features](#features)
  - [Skills](#skills)
  - [Hooks](#hooks)
  - [Commands](#commands)
  - [Browser Automation](#browser-automation)
  - [Tmux Integration](#tmux-integration)
  - [Git Master](#git-master)
  - [Comment Checker](#comment-checker)
  - [Notification](#notification)
  - [MCPs](#mcps)
  - [LSP](#lsp)
- [Advanced](#advanced)
  - [Runtime Fallback](#runtime-fallback)
  - [Model Capabilities](#model-capabilities)
  - [Hashline Edit](#hashline-edit)
  - [Experimental](#experimental)
- [Reference](#reference)
  - [Environment Variables](#environment-variables)
  - [Provider-Specific](#provider-specific)

---

## Getting Started

### File Locations

User config is loaded first, then project config overrides it. In each directory, the compatibility layer recognizes both the renamed and legacy basenames.

1. Project config: `.opencode/oh-my-openagent.json[c]` or `.opencode/oh-my-opencode.json[c]`
2. User config (`.jsonc` preferred over `.json`):

| Platform    | Path candidates |
| ----------- | --------------- |
| macOS/Linux | `~/.config/opencode/oh-my-openagent.json[c]`, `~/.config/opencode/oh-my-opencode.json[c]` |
| Windows     | `%APPDATA%\opencode\oh-my-openagent.json[c]`, `%APPDATA%\opencode\oh-my-opencode.json[c]` |

**Rename compatibility:** The published package and CLI binary remain `oh-my-opencode`. OpenCode plugin registration prefers `oh-my-openagent`, while legacy `oh-my-opencode` entries and config basenames still load during the transition. Config detection checks `oh-my-opencode` before `oh-my-openagent`, so if both plugin config basenames exist in the same directory, the legacy `oh-my-opencode.*` file currently wins.
JSONC supports `// line comments`, `/* block comments */`, and trailing commas.

Enable schema autocomplete:

```json
{
  "$schema": "https://raw.githubusercontent.com/code-yeongyu/oh-my-openagent/dev/assets/oh-my-opencode.schema.json"
}
```

Run `bunx oh-my-opencode install` for guided setup. Run `opencode models` to list available models.

### Quick Start Example

Here's a practical starting configuration:

```jsonc
{
  "$schema": "https://raw.githubusercontent.com/code-yeongyu/oh-my-openagent/dev/assets/oh-my-opencode.schema.json",

  "agents": {
    // Main orchestrator: Claude Opus or Kimi K2.5 work best
    "sisyphus": {
      "model": "kimi-for-coding/k2p5",
      "ultrawork": { "model": "anthropic/claude-opus-4-6", "variant": "max" },
    },

    // Research agents: cheap fast models are fine
    "librarian": { "model": "google/gemini-3-flash" },
    "explore": { "model": "github-copilot/grok-code-fast-1" },

    // Architecture consultation: GPT-5.4 or Claude Opus
    "oracle": { "model": "openai/gpt-5.4", "variant": "high" },

    // Prometheus inherits sisyphus model; just add prompt guidance
    "prometheus": {
      "prompt_append": "Leverage deep & quick agents heavily, always in parallel.",
    },
  },

  "categories": {
    // quick - trivial tasks
    "quick": { "model": "opencode/gpt-5-nano" },

    // unspecified-low - moderate tasks
    "unspecified-low": { "model": "anthropic/claude-sonnet-4-6" },

    // unspecified-high - complex work
    "unspecified-high": { "model": "anthropic/claude-opus-4-6", "variant": "max" },

    // writing - docs/prose
    "writing": { "model": "google/gemini-3-flash" },

    // visual-engineering - Gemini dominates visual tasks
    "visual-engineering": {
      "model": "google/gemini-3.1-pro",
      "variant": "high",
    },

    // Custom category for git operations
    "git": {
      "model": "opencode/gpt-5-nano",
      "description": "All git operations",
      "prompt_append": "Focus on atomic commits, clear messages, and safe operations.",
    },
  },

  // Limit expensive providers; let cheap ones run freely
  "background_task": {
    "providerConcurrency": {
      "anthropic": 3,
      "openai": 3,
      "opencode": 10,
      "zai-coding-plan": 10,
    },
    "modelConcurrency": {
      "anthropic/claude-opus-4-6": 2,
      "opencode/gpt-5-nano": 20,
    },
  },

  "experimental": { "aggressive_truncation": true, "task_system": true },
  "tmux": { "enabled": false },
}
```

---

## Core Concepts

### Agents

Override built-in agent settings. Available agents: `sisyphus`, `hephaestus`, `prometheus`, `oracle`, `librarian`, `explore`, `multimodal-looker`, `metis`, `momus`, `atlas`.

```json
{
  "agents": {
    "explore": { "model": "anthropic/claude-haiku-4-5", "temperature": 0.5 },
    "multimodal-looker": { "disable": true }
  }
}
```

Disable agents entirely: `{ "disabled_agents": ["oracle", "multimodal-looker"] }`

Core agents receive an injected runtime `order` field for deterministic Tab cycling in the UI: Sisyphus = 1, Hephaestus = 2, Prometheus = 3, Atlas = 4. This is not a user-configurable config key.

#### Agent Options

| Option            | Type           | Description                                                     |
| ----------------- | -------------- | --------------------------------------------------------------- |
| `model`           | string         | Model override (`provider/model`)                               |
| `fallback_models` | string\|array  | Fallback models on API errors. Supports strings or mixed arrays of strings and object entries with per-model settings |
| `temperature`     | number         | Sampling temperature                                            |
| `top_p`           | number         | Top-p sampling                                                  |
| `prompt`          | string         | Replace system prompt. Supports `file://` URIs                  |
| `prompt_append`   | string         | Append to system prompt. Supports `file://` URIs                |
| `tools`           | array         | Allowed tools list                                     |
| `disable`         | boolean       | Disable this agent                                     |
| `mode`            | string        | Agent mode                                             |
| `color`           | string        | UI color                                               |
| `permission`      | object        | Per-tool permissions (see below)                       |
| `category`        | string        | Inherit model from category                            |
| `variant`         | string        | Model variant: `max`, `high`, `medium`, `low`, `xhigh`. Normalized to supported values |
| `maxTokens`       | number        | Max response tokens                                    |
| `thinking`        | object        | Anthropic extended thinking                            |
| `reasoningEffort` | string        | OpenAI reasoning: `none`, `minimal`, `low`, `medium`, `high`, `xhigh`. Normalized to supported values |
| `textVerbosity`   | string        | Text verbosity: `low`, `medium`, `high`                |
| `providerOptions` | object        | Provider-specific options                              |

#### Anthropic Extended Thinking

```json
{
  "agents": {
    "oracle": { "thinking": { "type": "enabled", "budgetTokens": 200000 } }
  }
}
```

#### Agent Permissions

Control what tools an agent can use:

```json
{
  "agents": {
    "explore": {
      "permission": {
        "edit": "deny",
        "bash": "ask",
        "webfetch": "allow"
      }
    }
  }
}
```

| Permission           | Values                                                                      |
| -------------------- | --------------------------------------------------------------------------- |
| `edit`               | `ask` / `allow` / `deny`                                                    |
| `bash`               | `ask` / `allow` / `deny` or per-command: `{ "git": "allow", "rm": "deny" }` |
| `webfetch`           | `ask` / `allow` / `deny`                                                    |
| `doom_loop`          | `ask` / `allow` / `deny`                                                    |
| `external_directory` | `ask` / `allow` / `deny`                                                    |


#### Fallback Models with Per-Model Settings

`fallback_models` accepts either a single model string or an array. Array entries can be plain strings or objects with individual model settings:

```jsonc
{
  "agents": {
    "sisyphus": {
      "model": "anthropic/claude-opus-4-6",
      "fallback_models": [
        // Simple string fallback
        "openai/gpt-5.4",
        // Object with per-model settings
        {
          "model": "google/gemini-3.1-pro",
          "variant": "high",
          "temperature": 0.2
        },
        {
          "model": "anthropic/claude-sonnet-4-6",
          "thinking": { "type": "enabled", "budgetTokens": 64000 }
        }
      ]
    }
  }
}
```

Object entries support: `model`, `variant`, `reasoningEffort`, `temperature`, `top_p`, `maxTokens`, `thinking`.

#### File URIs for Prompts

Both `prompt` and `prompt_append` support loading content from files via `file://` URIs. Category-level `prompt_append` supports the same URI forms.

```jsonc
{
  "agents": {
    "sisyphus": {
      "prompt_append": "file:///absolute/path/to/prompt.txt"
    },
    "oracle": {
      "prompt": "file://./relative/to/project/prompt.md"
    },
    "explore": {
      "prompt_append": "file://~/home/dir/prompt.txt"
    }
  },
  "categories": {
    "custom": {
      "model": "anthropic/claude-sonnet-4-6",
      "prompt_append": "file://./category-context.md"
    }
  }
}
```

Paths can be absolute (`file:///abs/path`), relative to project root (`file://./rel/path`), or home-relative (`file://~/home/path`). If a file URI cannot be decoded, resolved, or read, OmO inserts a warning placeholder into the prompt instead of failing hard.

### Categories

Domain-specific model delegation used by the `task()` tool. When Sisyphus delegates work, it picks a category, not a model name.

#### Built-in Categories

| Category             | Default Model                   | Description                                    |
| -------------------- | ------------------------------- | ---------------------------------------------- |
| `visual-engineering` | `google/gemini-3.1-pro` (high)  | Frontend, UI/UX, design, animation             |
| `ultrabrain`         | `openai/gpt-5.4` (xhigh)        | Deep logical reasoning, complex architecture   |
| `deep`               | `openai/gpt-5.3-codex` (medium) | Autonomous problem-solving, thorough research  |
| `artistry`           | `google/gemini-3.1-pro` (high)  | Creative/unconventional approaches             |
| `quick`              | `openai/gpt-5.4-mini`           | Trivial tasks, typo fixes, single-file changes |
| `unspecified-low`    | `anthropic/claude-sonnet-4-6`   | General tasks, low effort                      |
| `unspecified-high`   | `anthropic/claude-opus-4-6` (max) | General tasks, high effort                   |
| `writing`            | `google/gemini-3-flash`         | Documentation, prose, technical writing        |

> **Note**: Built-in defaults only apply if the category is present in your config. Otherwise the system default model is used.

#### Category Options

| Option              | Type          | Default | Description                                                         |
| ------------------- | ------------- | ------- | ------------------------------------------------------------------- |
| `model`             | string        | -       | Model override                                                      |
| `fallback_models`   | string\|array | -       | Fallback models on API errors. Supports strings or mixed arrays of strings and object entries with per-model settings |
| `temperature`       | number        | -       | Sampling temperature                                                |
| `top_p`             | number        | -       | Top-p sampling                                                      |
| `maxTokens`         | number        | -       | Max response tokens                                                 |
| `thinking`          | object        | -       | Anthropic extended thinking                                         |
| `reasoningEffort`   | string        | -       | OpenAI reasoning effort. Unsupported values are normalized          |
| `textVerbosity`     | string        | -       | Text verbosity                                                      |
| `tools`             | array         | -       | Allowed tools                                                       |
| `prompt_append`     | string        | -       | Append to system prompt                                             |
| `variant`           | string        | -       | Model variant. Unsupported values are normalized                    |
| `description`       | string        | -       | Shown in `task()` tool prompt                                       |
| `is_unstable_agent` | boolean       | `false` | Force background mode + monitoring. Auto-enabled for Gemini models. |

Disable categories: `{ "disabled_categories": ["ultrabrain"] }`

### Model Resolution

Runtime priority:

1. **UI-selected model** - model chosen in the OpenCode UI, for primary agents
2. **User override** - model set in config → used exactly as-is. Even on cold cache, explicit user configuration takes precedence over hardcoded fallback chains
3. **Category default** - model inherited from the assigned category config
4. **User `fallback_models`** - user-configured fallback list is tried before built-in fallback chains
5. **Provider fallback chain** - built-in provider/model chain from OmO source
6. **System default** - OpenCode's configured default model

#### Model Settings Compatibility

Model settings are compatibility-normalized against model capabilities instead of failing hard.

Normalized fields:

- `variant` - downgraded to the closest supported value
- `reasoningEffort` - downgraded to the closest supported value, or removed if unsupported
- `temperature` - removed if unsupported by the model metadata
- `top_p` - removed if unsupported by the model metadata
- `maxTokens` - capped to the model's reported max output limit
- `thinking` - removed if the target model does not support thinking

Examples:
- Claude models do not support `reasoningEffort` - it is removed automatically
- GPT-4.1 does not support reasoning - `reasoningEffort` is removed
- o-series models support `none` through `high` - `xhigh` is downgraded to `high`
- GPT-5 supports `none`, `minimal`, `low`, `medium`, `high`, `xhigh` - all pass through

Capability data comes from provider runtime metadata first. OmO also ships bundled models.dev-backed capability data, supports a refreshable local models.dev cache, and falls back to heuristic family detection plus alias rules when exact metadata is unavailable. `bunx oh-my-opencode doctor` surfaces capability diagnostics and warns when a configured model relies on compatibility fallback.


#### Agent Provider Chains

| Agent                 | Default Model       | Provider Priority                                                            |
| --------------------- | ------------------- | ---------------------------------------------------------------------------- |
| **Sisyphus**          | `claude-opus-4-6`   | `claude-opus-4-6 (max)` → `kimi-k2.5` via OpenCode Go / Kimi providers → `gpt-5.4 (medium)` → `glm-5` → `big-pickle` |
| **Hephaestus**        | `gpt-5.4`           | `gpt-5.4 (medium)`                                                           |
| **oracle**            | `gpt-5.4`           | `gpt-5.4 (high)` → `gemini-3.1-pro (high)` → `claude-opus-4-6 (max)` → `glm-5` |
| **librarian**         | `minimax-m2.7`      | `opencode-go/minimax-m2.7` → `opencode/minimax-m2.7-highspeed` → `claude-haiku-4-5` → `gpt-5-nano` |
| **explore**           | `grok-code-fast-1`  | `grok-code-fast-1` → `opencode-go/minimax-m2.7-highspeed` → `opencode/minimax-m2.7` → `claude-haiku-4-5` → `gpt-5-nano` |
| **multimodal-looker** | `gpt-5.4`           | `gpt-5.4 (medium)` → `kimi-k2.5` → `glm-4.6v` → `gpt-5-nano`                |
| **Prometheus**        | `claude-opus-4-6`   | `claude-opus-4-6 (max)` → `gpt-5.4 (high)` → `glm-5` → `gemini-3.1-pro`     |
| **Metis**             | `claude-opus-4-6`   | `claude-opus-4-6 (max)` → `gpt-5.4 (high)` → `glm-5` → `k2p5`               |
| **Momus**             | `gpt-5.4`           | `gpt-5.4 (xhigh)` → `claude-opus-4-6 (max)` → `gemini-3.1-pro (high)` → `glm-5` |
| **Atlas**             | `claude-sonnet-4-6` | `claude-sonnet-4-6` → `kimi-k2.5` → `gpt-5.4 (medium)` → `minimax-m2.7`     |

#### Category Provider Chains

| Category               | Default Model       | Provider Priority                                              |
| ---------------------- | ------------------- | -------------------------------------------------------------- |
| **visual-engineering** | `gemini-3.1-pro`    | `gemini-3.1-pro` → `glm-5` → `claude-opus-4-6`                 |
| **ultrabrain**         | `gpt-5.4`           | `gpt-5.4` → `gemini-3.1-pro` → `claude-opus-4-6`               |
| **deep**               | `gpt-5.3-codex`     | `gpt-5.3-codex` → `claude-opus-4-6` → `gemini-3.1-pro`         |
| **artistry**           | `gemini-3.1-pro`    | `gemini-3.1-pro` → `claude-opus-4-6` → `gpt-5.4`               |
| **quick**              | `gpt-5.4-mini`    | `gpt-5.4-mini` → `claude-haiku-4-5` → `gemini-3-flash` → `minimax-m2.7` → `gpt-5-nano` |
| **unspecified-low**    | `claude-sonnet-4-6` | `claude-sonnet-4-6` → `gpt-5.3-codex` → `kimi-k2.5` → `gemini-3-flash` → `minimax-m2.7` |
| **unspecified-high**   | `claude-opus-4-6`   | `claude-opus-4-6` → `gpt-5.4 (high)` → `glm-5` → `k2p5` → `kimi-k2.5` |
| **writing**            | `gemini-3-flash`    | `gemini-3-flash` → `kimi-k2.5` → `claude-sonnet-4-6` → `minimax-m2.7`        |

Run `bunx oh-my-opencode doctor --verbose` to see effective model resolution for your config.

---

## Task System

### Background Tasks

Control parallel agent execution and concurrency limits.

```json
{
  "background_task": {
    "defaultConcurrency": 5,
    "staleTimeoutMs": 180000,
    "providerConcurrency": { "anthropic": 3, "openai": 5, "google": 10 },
    "modelConcurrency": { "anthropic/claude-opus-4-6": 2 }
  }
}
```

| Option                | Default  | Description                                                           |
| --------------------- | -------- | --------------------------------------------------------------------- |
| `defaultConcurrency`  | -        | Max concurrent tasks (all providers)                                  |
| `staleTimeoutMs`      | `180000` | Interrupt tasks with no activity (min: 60000)                         |
| `providerConcurrency` | -        | Per-provider limits (key = provider name)                             |
| `modelConcurrency`    | -        | Per-model limits (key = `provider/model`). Overrides provider limits. |

Priority: `modelConcurrency` > `providerConcurrency` > `defaultConcurrency`

### Sisyphus Agent

Configure the main orchestration system.

```json
{
  "sisyphus_agent": {
    "disabled": false,
    "default_builder_enabled": false,
    "planner_enabled": true,
    "replace_plan": true
  }
}
```

| Option                    | Default | Description                                                     |
| ------------------------- | ------- | --------------------------------------------------------------- |
| `disabled`                | `false` | Disable all Sisyphus orchestration, restore original build/plan |
| `default_builder_enabled` | `false` | Enable OpenCode-Builder agent (off by default)                  |
| `planner_enabled`         | `true`  | Enable Prometheus (Planner) agent                               |
| `replace_plan`            | `true`  | Demote default plan agent to subagent mode                      |

Sisyphus agents can also be customized under `agents` using their names: `Sisyphus`, `OpenCode-Builder`, `Prometheus (Planner)`, `Metis (Plan Consultant)`.

### Sisyphus Tasks

Enable the Sisyphus Tasks system for cross-session task tracking.

```json
{
  "sisyphus": {
    "tasks": {
      "enabled": false,
      "storage_path": ".sisyphus/tasks",
      "claude_code_compat": false
    }
  }
}
```

| Option               | Default           | Description                                |
| -------------------- | ----------------- | ------------------------------------------ |
| `enabled`            | `false`           | Enable Sisyphus Tasks system               |
| `storage_path`       | `.sisyphus/tasks` | Storage path (relative to project root)    |
| `claude_code_compat` | `false`           | Enable Claude Code path compatibility mode |

---

## Features

### Skills

Skills bring domain-specific expertise and embedded MCPs.

Built-in skills: `playwright`, `playwright-cli`, `agent-browser`, `dev-browser`, `git-master`, `frontend-ui-ux`

Disable built-in skills: `{ "disabled_skills": ["playwright"] }`

#### Skills Configuration

```json
{
  "skills": {
    "sources": [
      { "path": "./my-skills", "recursive": true },
      "https://example.com/skill.yaml"
    ],
    "enable": ["my-skill"],
    "disable": ["other-skill"],
    "my-skill": {
      "description": "What it does",
      "template": "Custom prompt template",
      "from": "source-file.ts",
      "model": "custom/model",
      "agent": "custom-agent",
      "subtask": true,
      "argument-hint": "usage hint",
      "license": "MIT",
      "compatibility": ">= 3.0.0",
      "metadata": { "author": "Your Name" },
      "allowed-tools": ["read", "bash"]
    }
  }
}
```

| `sources` option | Default | Description                     |
| ---------------- | ------- | ------------------------------- |
| `path`           | -       | Local path or remote URL        |
| `recursive`      | `false` | Recurse into subdirectories     |
| `glob`           | -       | Glob pattern for file selection |

### Hooks

Disable built-in hooks via `disabled_hooks`:

```json
{ "disabled_hooks": ["comment-checker"] }
```

Available hooks: `todo-continuation-enforcer`, `context-window-monitor`, `session-recovery`, `session-notification`, `comment-checker`, `grep-output-truncator`, `tool-output-truncator`, `directory-agents-injector`, `directory-readme-injector`, `empty-task-response-detector`, `think-mode`, `anthropic-context-window-limit-recovery`, `rules-injector`, `background-notification`, `auto-update-checker`, `startup-toast`, `keyword-detector`, `agent-usage-reminder`, `non-interactive-env`, `interactive-bash-session`, `compaction-context-injector`, `thinking-block-validator`, `claude-code-hooks`, `ralph-loop`, `preemptive-compaction`, `auto-slash-command`, `sisyphus-junior-notepad`, `no-sisyphus-gpt`, `start-work`, `runtime-fallback`

**Notes:**

- `directory-agents-injector` - auto-disabled on OpenCode 1.1.37+ (native AGENTS.md support)
- `no-sisyphus-gpt` - **do not disable**. It blocks incompatible GPT models for Sisyphus while allowing the dedicated GPT-5.4 prompt path.
- `startup-toast` is a sub-feature of `auto-update-checker`. Disable just the toast by adding `startup-toast` to `disabled_hooks`.
- `session-recovery` - automatically recovers from recoverable session errors (missing tool results, unavailable tools, thinking block violations). Shows toast notifications during recovery. Enable `experimental.auto_resume` for automatic retry after recovery.

### Commands

Disable built-in commands via `disabled_commands`:

```json
{ "disabled_commands": ["init-deep", "start-work"] }
```

Available commands: `init-deep`, `ralph-loop`, `ulw-loop`, `cancel-ralph`, `refactor`, `start-work`, `stop-continuation`, `handoff`

### Browser Automation

| Provider               | Interface | Installation                                        |
| ---------------------- | --------- | --------------------------------------------------- |
| `playwright` (default) | MCP tools | Auto-installed via npx                              |
| `agent-browser`        | Bash CLI  | `bun add -g agent-browser && agent-browser install` |

Switch provider:

```json
{ "browser_automation_engine": { "provider": "agent-browser" } }
```

### Tmux Integration

Run background subagents in separate tmux panes. Requires running inside tmux with `opencode --port <port>`.

```json
{
  "tmux": {
    "enabled": true,
    "layout": "main-vertical",
    "main_pane_size": 60,
    "main_pane_min_width": 120,
    "agent_pane_min_width": 40
  }
}
```

| Option                 | Default         | Description                                                                         |
| ---------------------- | --------------- | ----------------------------------------------------------------------------------- |
| `enabled`              | `false`         | Enable tmux pane spawning                                                           |
| `layout`               | `main-vertical` | `main-vertical` / `main-horizontal` / `tiled` / `even-horizontal` / `even-vertical` |
| `main_pane_size`       | `60`            | Main pane % (20–80)                                                                 |
| `main_pane_min_width`  | `120`           | Min main pane columns                                                               |
| `agent_pane_min_width` | `40`            | Min agent pane columns                                                              |

### Git Master

Configure git commit behavior:

```json
{ "git_master": { "commit_footer": true, "include_co_authored_by": true } }
```

### Comment Checker

Customize the comment quality checker:

```json
{
  "comment_checker": {
    "custom_prompt": "Your message. Use {{comments}} placeholder."
  }
}
```

### Notification

Force-enable session notifications:

```json
{ "notification": { "force_enable": true } }
```

`force_enable` (`false`) - force session-notification even if external notification plugins are detected.

### MCPs

Built-in MCPs (enabled by default): `websearch` (Exa AI), `context7` (library docs), `grep_app` (GitHub code search).

```json
{ "disabled_mcps": ["websearch", "context7", "grep_app"] }
```

### LSP

Configure Language Server Protocol integration:

```json
{
  "lsp": {
    "typescript-language-server": {
      "command": ["typescript-language-server", "--stdio"],
      "extensions": [".ts", ".tsx"],
      "priority": 10,
      "env": { "NODE_OPTIONS": "--max-old-space-size=4096" },
      "initialization": {
        "preferences": { "includeInlayParameterNameHints": "all" }
      }
    },
    "pylsp": { "disabled": true }
  }
}
```

| Option           | Type    | Description                          |
| ---------------- | ------- | ------------------------------------ |
| `command`        | array   | Command to start LSP server          |
| `extensions`     | array   | File extensions (e.g. `[".ts"]`)     |
| `priority`       | number  | Priority when multiple servers match |
| `env`            | object  | Environment variables                |
| `initialization` | object  | Init options passed to server        |
| `disabled`       | boolean | Disable this server                  |

---

## Advanced

### Runtime Fallback

Auto-switches to backup models on API errors.

**Simple configuration** (enable/disable with defaults):

```json
{ "runtime_fallback": true }
{ "runtime_fallback": false }
```

**Advanced configuration** (full control):

```json
{
  "runtime_fallback": {
    "enabled": true,
    "retry_on_errors": [400, 429, 503, 529],
    "max_fallback_attempts": 3,
    "cooldown_seconds": 60,
    "timeout_seconds": 30,
    "notify_on_fallback": true
  }
}
```

| Option                  | Default             | Description                                                                                                                    |
| ----------------------- | ------------------- | ------------------------------------------------------------------------------------------------------------------------------ |
| `enabled`               | `false`             | Enable runtime fallback                                                                                                        |
| `retry_on_errors`       | `[400,429,503,529]` | HTTP codes that trigger fallback. Also handles classified provider key errors.                                                 |
| `max_fallback_attempts` | `3`                 | Max fallback attempts per session (1–20)                                                                                       |
| `cooldown_seconds`      | `60`                | Seconds before retrying a failed model                                                                                         |
| `timeout_seconds`       | `30`                | Seconds before forcing next fallback. **Set to `0` to disable timeout-based escalation and provider retry message detection.** |
| `notify_on_fallback`    | `true`              | Toast notification on model switch                                                                                             |

Define `fallback_models` per agent or category:

```json
{
  "agents": {
    "sisyphus": {
      "model": "anthropic/claude-opus-4-6",
      "fallback_models": [
        "openai/gpt-5.4",
        {
          "model": "google/gemini-3.1-pro",
          "variant": "high"
        }
      ]
    }
  }
}
```

`fallback_models` also supports object-style entries so you can attach settings to a specific fallback model:

```json
{
  "agents": {
    "sisyphus": {
      "model": "anthropic/claude-opus-4-6",
      "fallback_models": [
        "openai/gpt-5.4",
        {
          "model": "anthropic/claude-sonnet-4-6",
          "variant": "high",
          "thinking": { "type": "enabled", "budgetTokens": 12000 }
        },
        {
          "model": "openai/gpt-5.3-codex",
          "reasoningEffort": "high",
          "temperature": 0.2,
          "top_p": 0.95,
          "maxTokens": 8192
        }
      ]
    }
  }
}
```

Mixed arrays are allowed, so string entries and object entries can appear together in the same fallback chain.

#### Object-style `fallback_models`

Object entries use the following shape:

| Field | Type | Description |
| ----- | ---- | ----------- |
| `model` | string | Fallback model ID. Provider prefix is optional when OmO can inherit the current/default provider. |
| `variant` | string | Explicit variant override for this fallback entry. |
| `reasoningEffort` | string | OpenAI reasoning effort override for this fallback entry. |
| `temperature` | number | Temperature applied if this fallback model becomes active. |
| `top_p` | number | Top-p applied if this fallback model becomes active. |
| `maxTokens` | number | Max response tokens applied if this fallback model becomes active. |
| `thinking` | object | Anthropic thinking config applied if this fallback model becomes active. |

Per-model settings are **fallback-only**. They are promoted only when that specific fallback model is actually selected, so they do not override your primary model settings when the primary model resolves successfully.

`thinking` uses the same shape as the normal agent/category option:

| Field | Type | Description |
| ----- | ---- | ----------- |
| `type` | string | `enabled` or `disabled` |
| `budgetTokens` | number | Optional Anthropic thinking budget |

Object entries can also omit the provider prefix when OmO can infer it from the current/default provider. If you provide both inline variant syntax in `model` and an explicit `variant` field, the explicit `variant` field wins.

#### Full examples

**1. Simple string chain**

Use strings when you only need an ordered fallback chain:

```json
{
  "agents": {
    "atlas": {
      "model": "anthropic/claude-sonnet-4-6",
      "fallback_models": [
        "anthropic/claude-haiku-4-5",
        "openai/gpt-5.4",
        "google/gemini-3.1-pro"
      ]
    }
  }
}
```

**2. Same-provider shorthand**

If the primary model already establishes the provider, fallback entries can omit the prefix:

```json
{
  "agents": {
    "atlas": {
      "model": "openai/gpt-5.4",
      "fallback_models": [
        "gpt-5.4-mini",
        {
          "model": "gpt-5.3-codex",
          "reasoningEffort": "medium",
          "maxTokens": 4096
        }
      ]
    }
  }
}
```

In this example OmO treats `gpt-5.4-mini` and `gpt-5.3-codex` as OpenAI fallback entries because the current/default provider is already `openai`.

**3. Mixed cross-provider chain**

Mix string entries and object entries when only some fallback models need special settings:

```json
{
  "agents": {
    "sisyphus": {
      "model": "anthropic/claude-opus-4-6",
      "fallback_models": [
        "openai/gpt-5.4",
        {
          "model": "anthropic/claude-sonnet-4-6",
          "variant": "high",
          "thinking": { "type": "enabled", "budgetTokens": 12000 }
        },
        {
          "model": "google/gemini-3.1-pro",
          "variant": "high"
        }
      ]
    }
  }
}
```

**4. Category-level fallback chain**

`fallback_models` works the same way under `categories`:

```json
{
  "categories": {
    "deep": {
      "model": "openai/gpt-5.3-codex",
      "fallback_models": [
        {
          "model": "openai/gpt-5.4",
          "reasoningEffort": "xhigh",
          "maxTokens": 12000
        },
        {
          "model": "anthropic/claude-opus-4-6",
          "variant": "max",
          "temperature": 0.2
        },
        "google/gemini-3.1-pro(high)"
      ]
    }
  }
}
```

**5. Full object entry with every supported field**

This shows every supported object-style parameter in one place:

```json
{
  "agents": {
    "oracle": {
      "model": "openai/gpt-5.4",
      "fallback_models": [
        {
          "model": "openai/gpt-5.3-codex(low)",
          "variant": "xhigh",
          "reasoningEffort": "high",
          "temperature": 0.3,
          "top_p": 0.9,
          "maxTokens": 8192,
          "thinking": {
            "type": "disabled"
          }
        }
      ]
    }
  }
}
```

In this example the explicit `"variant": "xhigh"` overrides the inline `(low)` suffix in `"model"`.

This final example is a **complete shape reference**. In real configs, prefer provider-appropriate settings:

- use `reasoningEffort` for OpenAI reasoning models
- use `thinking` for Anthropic thinking-capable models
- use `variant`, `temperature`, `top_p`, and `maxTokens` only when that fallback model supports them

### Model Capabilities

OmO can refresh a local models.dev capability snapshot on startup. This cache is controlled by `model_capabilities`.

```jsonc
{
  "model_capabilities": {
    "enabled": true,
    "auto_refresh_on_start": true,
    "refresh_timeout_ms": 5000,
    "source_url": "https://models.dev/api.json"
  }
}
```

| Option | Default behavior | Description |
| ------ | ---------------- | ----------- |
| `enabled` | enabled unless explicitly set to `false` | Master switch for model capability refresh behavior |
| `auto_refresh_on_start` | refresh on startup unless explicitly set to `false` | Refresh the local models.dev cache during startup checks |
| `refresh_timeout_ms` | `5000` | Timeout for the startup refresh attempt |
| `source_url` | `https://models.dev/api.json` | Override the models.dev source URL |

Notes:

- Startup refresh runs through the auto-update checker hook.
- Manual refresh is available via `bunx oh-my-opencode refresh-model-capabilities`.
- Provider runtime metadata still takes priority when OmO resolves capabilities for compatibility checks.

### Hashline Edit

Replaces the built-in `Edit` tool with a hash-anchored version using `LINE#ID` references to prevent stale-line edits. Disabled by default.

```json
{ "hashline_edit": true }
```

When enabled, two companion hooks are active: `hashline-read-enhancer` (annotates Read output) and `hashline-edit-diff-enhancer` (shows diffs). Opt-in by setting `hashline_edit: true`. Disable the companion hooks individually via `disabled_hooks` if needed.

### Experimental

```json
{
  "experimental": {
    "truncate_all_tool_outputs": false,
    "aggressive_truncation": false,
    "auto_resume": false,
    "disable_omo_env": false,
    "task_system": true,
    "dynamic_context_pruning": {
      "enabled": false,
      "notification": "detailed",
      "turn_protection": { "enabled": true, "turns": 3 },
      "protected_tools": [
        "task",
        "todowrite",
        "todoread",
        "lsp_rename",
        "session_read",
        "session_write",
        "session_search"
      ],
      "strategies": {
        "deduplication": { "enabled": true },
        "supersede_writes": { "enabled": true, "aggressive": false },
        "purge_errors": { "enabled": true, "turns": 5 }
      }
    }
  }
}
```

| Option                                   | Default    | Description                                                                          |
| ---------------------------------------- | ---------- | ------------------------------------------------------------------------------------ |
| `truncate_all_tool_outputs`              | `false`    | Truncate all tool outputs (not just whitelisted)                                     |
| `aggressive_truncation`                  | `false`    | Aggressively truncate when token limit exceeded                                      |
| `auto_resume`                            | `false`    | Auto-resume after thinking block recovery                                            |
| `disable_omo_env`                        | `false`    | Disable auto-injected `<omo-env>` block (date/time/locale). Improves cache hit rate. |
| `task_system`                            | `true`     | Enable Sisyphus task system                                                          |
| `dynamic_context_pruning.enabled`        | `false`    | Auto-prune old tool outputs to manage context window                                 |
| `dynamic_context_pruning.notification`   | `detailed` | Pruning notifications: `off` / `minimal` / `detailed`                                |
| `turn_protection.turns`                  | `3`        | Recent turns protected from pruning (1–10)                                           |
| `strategies.deduplication`               | `true`     | Remove duplicate tool calls                                                          |
| `strategies.supersede_writes`            | `true`     | Prune write inputs when file later read                                              |
| `strategies.supersede_writes.aggressive` | `false`    | Prune any write if ANY subsequent read exists                                        |
| `strategies.purge_errors.turns`          | `5`        | Turns before pruning errored tool inputs                                             |

---

## Reference

### Environment Variables

| Variable              | Description                                                       |
| --------------------- | ----------------------------------------------------------------- |
| `OPENCODE_CONFIG_DIR` | Override OpenCode config directory (useful for profile isolation) |

### Provider-Specific

#### Google Auth

Install [`opencode-antigravity-auth`](https://github.com/NoeFabris/opencode-antigravity-auth) for Google Gemini. Provides multi-account load balancing, dual quota, and variant-based thinking.

#### Ollama

**Must** disable streaming to avoid JSON parse errors:

```json
{
  "agents": {
    "explore": { "model": "ollama/qwen3-coder", "stream": false }
  }
}
```

Common models: `ollama/qwen3-coder`, `ollama/ministral-3:14b`, `ollama/lfm2.5-thinking`

See [Ollama Troubleshooting](../troubleshooting/ollama.md) for `JSON Parse error: Unexpected EOF` issues.