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/sequenzia/agent-alchemy/oc-update-skillnpx skills add sequenzia/agent-alchemy --skill oc-update-skillgit clone --depth 1 https://github.com/sequenzia/agent-alchemyWrote 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/sequenzia/agent-alchemy/oc-update-skill)<a href="https://agentmods.dev/skills/sequenzia/agent-alchemy/oc-update-skill"><img src="https://agentmods.dev/badge/skills/sequenzia/agent-alchemy/oc-update-skill.svg" alt="Measured on agentmods" 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 | $0.00065 | $0.01345 |
| Opus 5 | $0.00032 | $0.00673 |
| Sonnet 5 | $0.00013 | $0.00269 |
| Haiku 4.5 | $0.00006 | $0.00135 |
Grade A, and why
oc-update-skill 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 5d 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 — 183 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Update OpenCode Skill
You are initiating the OpenCode skill update workflow. This process locates an existing skill, researches current platform best practices, analyzes the skill for outdated patterns, and applies updates with validation.
Critical Rules
AskUserQuestion is MANDATORY
IMPORTANT: You MUST use the AskUserQuestion tool for ALL questions to the user. Never ask questions through regular text output.
Phase 1: Load References
Read the OpenCode platform overview and skill guide:
- Read
${CLAUDE_PLUGIN_ROOT}/references/platform-overview.md - Read
${CLAUDE_PLUGIN_ROOT}/references/skill-guide.md
Phase 2: Locate Skill
Find the skill to update.
If $ARGUMENTS is provided:
- Check if the argument is a file path — read it directly
- If it's a skill name — search for it in known discovery paths
If no arguments:
- Search for OpenCode skills in the workspace:
Globfor.opencode/skills/*/SKILL.mdGlobfor.claude/skills/*/SKILL.mdGlobfor.agents/skills/*/SKILL.md
- Present found skills using
AskUserQuestion:- Header: "Select Skill"
- Question: "Which skill would you like to update?"
- Options: List found skills (up to 4; include "Other" for custom path)
Read the selected skill file and store its contents.
Phase 3: Research
Spawn the researcher agent to check latest OpenCode documentation:
Task:
subagent_type: "agent-alchemy-opencode-tools:oc-researcher"
prompt: |
Research the latest OpenCode documentation for skill format compatibility.
Artifact type: skill
Current artifact content:
---
{contents of the skill file}
---
Specific questions:
1. Are there any new skill frontmatter fields since v1.2.10?
2. Have any existing fields been deprecated?
3. Are there new best practices for skill body structure?
4. Any changes to $VARIABLE placeholder handling?
Reference guide: ${CLAUDE_PLUGIN_ROOT}/references/skill-guide.md
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.
- 5d ago First seen · 183 lines · 65 tokens per session scan A 04b6eb9cc313
oc-update-skill is a skill published in the GitHub repository sequenzia/agent-alchemy (43 stars, last pushed 3mo ago), licensed MIT. It adds 65 tokens to every session and 1,345 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 2026-08-30.
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