opencode-config

A reference for configuring OpenCode, a coding tool with a text-based interface, through JSON or JSONC files. It covers runtime settings, appearance, providers, agents, permissions, and managed company settings.

In plain words
What is it for?
Setting up OpenCode projects, connecting providers, using variables, configuring its text interface, deploying company-managed settings, and diagnosing configuration problems.
Why use it?
It explains which configuration file applies, how settings combine, and how to validate or troubleshoot them.

Skill for Claude CodeCodex

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/timmy6942025/opencode-builder-skill/opencode-config
Any agent
npx skills add Timmy6942025/opencode-builder-skill --skill opencode-config
Clone the repo
git clone --depth 1 https://github.com/Timmy6942025/opencode-builder-skill

Made for: Claude Code, Codex.

Per session 70 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 11,451 The whole file, excluding the scripts and references it only reads on demand.
Security scan E 2 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00070 $0.11451
Opus 5 $0.00035 $0.05726
Sonnet 5 $0.00014 $0.02290
Haiku 4.5 $0.00007 $0.01145

Measured yesterday against content hash d962e1422abe, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade E, and why

opencode-config scanned grade E with 2 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured yesterday.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Reaches for credential fileshighPrivilege escalation

SSH keys, cloud credentials, git-credentials, .npmrc, /etc/shadow: reading these is how a config file becomes a credential leak.

| `profile` | AWS named profile from `~/.aws/credentials` (defaults to `AWS_PROFILE` env var). |

Recursive force deletehighDestructive command

rm -rf with a variable or a broad path is one typo away from removing the wrong tree.

<key>rm -rf *</key>
skills/opencode-config/SKILL.md · 1,418 lines

How it starts

The opening of the file, as written. The whole thing — 1,418 lines — stays where its author put it; the contents beside it link to each section on GitHub.

OpenCode Configuration

📚 Official Docs: For the latest information, always refer to the official documentation: https://opencode.ai/docs/config/

OpenCode uses JSON-based configuration files to control runtime behavior, TUI appearance, server settings, tool permissions, agent definitions, and provider connections. This skill covers every aspect of configuration: file format, locations, precedence, merging, all available fields, TUI config, variable substitution, enterprise managed settings, environment variables, and troubleshooting.


Table of Contents


Format

OpenCode supports both JSON and JSONC (JSON with Comments) formats for all configuration files.

Schema

Every config file should include a $schema field for editor validation and autocomplete:

  • Server/runtime config: "$schema": "https://opencode.ai/config.json"
  • TUI config: "$schema": "https://opencode.ai/tui.json"
{
  "$schema": "https://opencode.ai/config.json",
  "model": "anthropic/claude-sonnet-4-5",
  "autoupdate": true,
  "server": {
    "port": 4096
  }
}

Schemas enable autocompletion in VS Code, JetBrains editors, and other JSON-aware editors. Omitting the schema is valid but not recommended.


Config Locations & Precedence

Configuration files are merged together, not replaced. Settings from multiple locations are combined. Later sources override earlier ones only for conflicting keys. Non-conflicting settings from all configs are preserved.

Read the full file on GitHub · 1,418 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. yesterday First seen · 1,418 lines · 70 tokens per session scan E d962e1422abe

Subscribe to this mod's changes

opencode-config is a skill published in the GitHub repository Timmy6942025/opencode-builder-skill (2 stars, last pushed 3mo ago), licensed MIT. It adds 70 tokens to every session and 11,451 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it E with 2 findings (reaches for credential files, recursive force delete). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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