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/conorbronsdon/agent-context-os/migrate-gemininpx skills add conorbronsdon/agent-context-os --skill migrate-geminigit clone --depth 1 https://github.com/conorbronsdon/agent-context-osWrote 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/conorbronsdon/agent-context-os/migrate-gemini)<a href="https://agentmods.dev/skills/conorbronsdon/agent-context-os/migrate-gemini"><img src="https://agentmods.dev/badge/skills/conorbronsdon/agent-context-os/migrate-gemini.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 5.1 | $0.00037 | $0.00885 |
| Opus 5 | $0.00018 | $0.00443 |
| Sonnet 5 | $0.00007 | $0.00177 |
| Haiku 4.5 | $0.00004 | $0.00089 |
Grade A, and why
migrate-gemini 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 6d 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 — 86 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Migrate Gemini workflows
Move proven Gemini CLI workflows into this workspace without bulk-copying private history or silently changing behavior.
Consumer Gemini CLI requests transitioned to Antigravity CLI in June 2026; continuing enterprise/API-key Gemini CLI remains a distinct path. Treat Gemini files as migration sources. Do not claim that Antigravity shares Gemini skill discovery, hook, permission, or lifecycle behavior unless the installed target has been separately validated.
Safety rules
- Start with inventory and a dry run. Do not mutate source Gemini files.
- Never print or persist token values, environment values, credentials, or full chat transcripts.
- Work on a branch or worktree and show the proposed file map before writing.
- Require explicit user approval before running a non-dry-run import or replacing an existing file.
- Treat hooks and MCP configuration as executable/security-sensitive configuration. Rebuild and review them; do not blindly copy them.
Procedure
1. Define the scope
Ask for the Gemini project or configuration directory and the 1–3 workflows that matter most. Prefer a narrow migration over an account-wide import.
Inventory only the presence, path, and type of:
GEMINI.mdfiles and imports.gemini/commands/.gemini/skills/and.agents/skills/- hook event names and command names (not secret environment values)
- MCP server names and transport types (not credentials)
- extensions and headless scripts that need manual review
Write the inventory to .context-os/migrations/<timestamp>/inventory.json. This directory is gitignored.
2. Offer Claude Code's native dry run when available
If the user is in Claude Code, offer an explicit handoff to the native interactive command:
/import gemini --dry-run
Do not try to invoke another slash command from this skill. If the user chooses the native path, stop and let them invoke it directly, then review its proposed file map and warnings. If it is unavailable for the installed version/provider, continue with the manual mapping below; do not improvise a destructive import.
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.
- 6d ago First seen · 86 lines · 37 tokens per session scan A d39316ff93e0
migrate-gemini is a skill published in the GitHub repository conorbronsdon/agent-context-os (22 stars, last pushed today), licensed MIT. It adds 37 tokens to every session and 885 once invoked, about $0.0002 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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