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oh-my-openagent/docs/reference/configuration.md
YeonGyu-Kim d39891fcab docs: update hephaestus default model references from gpt-5.3-codex to gpt-5.4
Updated across README (all locales), docs/guide/, docs/reference/,
docs/examples/, AGENTS.md files, and test expectations/snapshots.

The deep category and multimodal-looker still use gpt-5.3-codex as
those are separate from the hephaestus agent.
2026-03-26 19:25:26 +09:00

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# Configuration Reference
Complete reference for `oh-my-openagent.jsonc` configuration. This document covers every available option with examples.
---
## 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)
- [Hashline Edit](#hashline-edit)
- [Experimental](#experimental)
- [Reference](#reference)
- [Environment Variables](#environment-variables)
- [Provider-Specific](#provider-specific)
---
## Getting Started
### File Locations
Priority order (project overrides user):
1. `.opencode/oh-my-openagent.jsonc` / `.opencode/oh-my-openagent.json`
2. User config (`.jsonc` preferred over `.json`):
| Platform | Path |
| ----------- | ----------------------------------------- |
| macOS/Linux | `~/.config/opencode/oh-my-openagent.jsonc` |
| Windows | `%APPDATA%\opencode\oh-my-openagent.jsonc` |
JSONC supports `// line comments`, `/* block comments */`, and trailing commas.
Enable schema autocomplete:
```json
{
"$schema": "https://raw.githubusercontent.com/code-yeongyu/oh-my-openagent/dev/assets/oh-my-openagent.schema.json"
}
```
Run `bunx oh-my-openagent install` for guided setup. Run `opencode models` to list available models.
### Quick Start Example
Here's a practical starting configuration:
```jsonc
{
"$schema": "https://raw.githubusercontent.com/code-yeongyu/oh-my-openagent/dev/assets/oh-my-openagent.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"] }`
#### Agent Options
| Option | Type | Description |
| ----------------- | ------------- | ------------------------------------------------------ |
| `model` | string | Model override (`provider/model`) |
| `fallback_models` | string\|array | Fallback models on API errors |
| `temperature` | number | Sampling temperature |
| `top_p` | number | Top-p sampling |
| `prompt` | string | Replace system prompt |
| `prompt_append` | string | Append to system prompt |
| `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` |
| `maxTokens` | number | Max response tokens |
| `thinking` | object | Anthropic extended thinking |
| `reasoningEffort` | string | OpenAI reasoning: `low`, `medium`, `high`, `xhigh` |
| `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` |
### 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 |
| `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 |
| `textVerbosity` | string | - | Text verbosity |
| `tools` | array | - | Allowed tools |
| `prompt_append` | string | - | Append to system prompt |
| `variant` | string | - | Model variant |
| `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
3-step priority at runtime:
1. **User override** — model set in config → used exactly as-is
2. **Provider fallback chain** — tries each provider in priority order until available
3. **System default** — falls back to OpenCode's configured default model
#### Agent Provider Chains
| Agent | Default Model | Provider Priority |
| --------------------- | ------------------- | ---------------------------------------------------------------------------- |
| **Sisyphus** | `claude-opus-4-6` | `claude-opus-4-6``glm-5``big-pickle` |
| **Hephaestus** | `gpt-5.4` | `gpt-5.4` |
| **oracle** | `gpt-5.4` | `gpt-5.4``gemini-3.1-pro``claude-opus-4-6` |
| **librarian** | `minimax-m2.7` | `minimax-m2.7``minimax-m2.7-highspeed``claude-haiku-4-5``gpt-5-nano` |
| **explore** | `grok-code-fast-1` | `grok-code-fast-1``minimax-m2.7-highspeed``minimax-m2.7``claude-haiku-4-5``gpt-5-nano` |
| **multimodal-looker** | `gpt-5.3-codex` | `gpt-5.3-codex``k2p5``gemini-3-flash``glm-4.6v``gpt-5-nano` |
| **Prometheus** | `claude-opus-4-6` | `claude-opus-4-6``gpt-5.4``gemini-3.1-pro` |
| **Metis** | `claude-opus-4-6` | `claude-opus-4-6``gpt-5.4``gemini-3.1-pro` |
| **Momus** | `gpt-5.4` | `gpt-5.4``claude-opus-4-6``gemini-3.1-pro` |
| **Atlas** | `claude-sonnet-4-6` | `claude-sonnet-4-6``gpt-5.4` |
#### 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``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``claude-sonnet-4-6``minimax-m2.7` |
Run `bunx oh-my-openagent 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`.
### 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 % (2080) |
| `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 (120) |
| `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", "google/gemini-3.1-pro"]
}
}
}
```
### 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": false,
"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` | `false` | 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 (110) |
| `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.