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 skills add xonovex/platform --skill opencode-guidegit clone --depth 1 https://github.com/xonovex/platformWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/xonovex/platform/opencode-guide)<a href="https://agentmods.dev/skills/xonovex/platform/opencode-guide"><img src="https://agentmods.dev/badge/skills/xonovex/platform/opencode-guide/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/xonovex/platform/opencode-guide"><img src="https://agentmods.dev/badge/skills/xonovex/platform/opencode-guide.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00088 | $0.00515 |
| Opus 5.5 | $0.00035 | $0.00206 |
| Sonnet 5.5 | $0.00018 | $0.00103 |
| Haiku 4.5 | $0.00009 | $0.00052 |
Grade A, and why
opencode-guide 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 1mo 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 — 36 lines — stays where its author put it; the contents beside it link to each section on GitHub.
OpenCode Plugins and Events
Configure OpenCode's native plugin and event surface without inventing unsupported guarantees or a universal hook file.
Essentials
- Treat plugins as executables - Local and npm plugins run with OpenCode process authority.
- Preserve load order - Global config, project config, global plugins, then project plugins run sequentially.
- Use tool interception precisely -
tool.execute.beforecan inspect/mutate or fail a call; other events may only observe. - Separate permission events - Event availability does not itself prove decision control.
- Review automatic installs - Config dependencies and npm plugins may trigger Bun installation at startup.
- Onboard through native scopes - Preview config/plugin source, permissions, data flow, ordering, verification, disable, and rollback.
Gotchas
- Plugins from all sources load, and all hooks run in documented sequence; similar local and npm plugins can both load.
- An npm dependency may be installed automatically at startup.
- A custom tool with the same name as a built-in tool takes precedence.
shell.envaffects AI shell tools and user terminals; injecting secrets broadens exposure.- Compaction customization uses an experimental event and cannot provide a requested stable guarantee.
Example
A secret-file control uses a reviewed project plugin with tool.execute.before; onboarding verifies the project source and dependencies, tests the thrown denial, records sequential load order and conflicting plugins, and rolls back by removing only the owned plugin and config dependency.
Progressive Disclosure
- Read references/capabilities.md - Load when mapping semantic intents to native events, handlers, guarantees, versions, ordering, context, or limitations
- Read references/onboarding.md - Load when discovering, previewing, applying, verifying, disabling, rolling back, updating, or detecting drift
- Read references/patterns.md - Load when translating deterministic hooks, model evaluators, specialist agents, or managed adoption recipes
What ships with it
7 files 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.
- 1mo ago First seen · 36 lines · 88 tokens per session scan A 91cd9524ef6f
opencode-guide is a skill published in the GitHub repository xonovex/platform (6 stars, last pushed 2d ago), licensed MIT. It adds 88 tokens to every session and 515 once invoked, about $0.0004 per session on Opus 5.5. 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 2026-09-08.
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