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.
npx agentmods add skills/travisennis/acai/add-opencode-modelnpx skills add travisennis/acai --skill add-opencode-modelgit clone --depth 1 https://github.com/travisennis/acaiWhat 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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00069 | $0.02118 |
| Opus 5 | $0.00034 | $0.01059 |
| Sonnet 5 | $0.00014 | $0.00424 |
| Haiku 4.5 | $0.00007 | $0.00212 |
Grade A, and why
add-opencode-model scanned grade A with 0 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 2d ago.
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.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 229 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Add OpenCode Zen Model
Fetches model details from both OpenCode and OpenRouter APIs to provide structured information for the agent to add the model to source/models/opencode-zen-provider.ts.
Usage
Run this script from this file's directory.
./add-model.js google/gemini-3-flash-preview
How It Works
- Confirms model exists in OpenCode API (
https://opencode.ai/zen/v1/models) - Searches OpenRouter API (
https://openrouter.ai/api/v1/models) for matching model to get:- Context window length
- Max output tokens
- Pricing information
- Supported features (reasoning/tool calling)
- Determines client type based on model provider:
openai→ uses@ai-sdk/openai(Responses API)google→ uses@ai-sdk/google(custom base URL)anthropic→ uses@ai-sdk/anthropicopenai-compatible→ usescreateOpenAICompatible
- Outputs JSON with all details needed to add the model
JSON Output Format
The script outputs a JSON object wrapped in markers:
--- MODEL_DETAILS_JSON_START ---
{...}
--- MODEL_DETAILS_JSON_END ---
JSON Structure
{
"modelKey": "gemini-3-flash-preview",
"opencodeId": "google/gemini-3-flash-preview",
"openrouterId": "google/gemini-3-flash-preview",
"providerFile": "./source/models/opencode-zen-provider.ts",
"registryId": "opencode:gemini-3-flash-preview",
"clientType": "google",
"registryEntry": {
"id": "opencode:gemini-3-flash-preview",
"provider": "OpenCode",
"contextWindow": 1048576,
"maxOutputTokens": 65535,
"defaultTemperature": 0.5,
"promptFormat": "markdown",
"supportsReasoning": true,
"supportsToolCalling": true,
"costPerInputToken": 0.0000005,
"costPerOutputToken": 0.000003
},
"clientConfig": {
"key": "gemini-3-flash-preview",
"opencodeId": "google/gemini-3-flash-preview",
"clientType": "google",
"openrouterId": "google/gemini-3-flash-preview"
},
"modelInfo": {
"opencodeId": "google/gemini-3-flash-preview",
"opencodeName": "Gemini 3 Flash Preview",
"openrouterId": "google/gemini-3-flash-preview",
"openrouterName": "Google: Gemini 3 Flash Preview",
"contextLength": 1048576,
"maxCompletionTokens": 65535,
"pricing": {...},
"supportedParameters": [...]
}
}
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 2d ago First seen · 229 lines · 69 tokens per session scan A b45847d3cd09
add-opencode-model is a skill published in the GitHub repository travisennis/acai (5 stars, last pushed 1mo ago), licensed MIT. It adds 69 tokens to every session and 2,118 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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