feat(gemini): add Gemini CLI as sixth target provider
Add `--to gemini` support for both `convert` and `install` commands, converting Claude Code plugins into Gemini CLI-compatible format. - Agents convert to `.gemini/skills/*/SKILL.md` with description frontmatter - Commands convert to `.gemini/commands/*.toml` with TOML prompt format - Namespaced commands create directory structure (workflows:plan -> workflows/plan.toml) - Skills pass through unchanged (identical SKILL.md standard) - MCP servers written to `.gemini/settings.json` with merge support - Content transforms: .claude/ paths, Task calls, @agent references - Hooks emit warning (different format in Gemini) Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
Kieran Klaassen
342
tests/gemini-converter.test.ts
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342
tests/gemini-converter.test.ts
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import { describe, expect, test } from "bun:test"
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import { convertClaudeToGemini, toToml, transformContentForGemini } from "../src/converters/claude-to-gemini"
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import { parseFrontmatter } from "../src/utils/frontmatter"
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import type { ClaudePlugin } from "../src/types/claude"
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const fixturePlugin: ClaudePlugin = {
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root: "/tmp/plugin",
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manifest: { name: "fixture", version: "1.0.0" },
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agents: [
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{
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name: "Security Reviewer",
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description: "Security-focused agent",
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capabilities: ["Threat modeling", "OWASP"],
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model: "claude-sonnet-4-20250514",
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body: "Focus on vulnerabilities.",
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sourcePath: "/tmp/plugin/agents/security-reviewer.md",
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},
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],
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commands: [
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{
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name: "workflows:plan",
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description: "Planning command",
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argumentHint: "[FOCUS]",
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model: "inherit",
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allowedTools: ["Read"],
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body: "Plan the work.",
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sourcePath: "/tmp/plugin/commands/workflows/plan.md",
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},
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],
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skills: [
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{
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name: "existing-skill",
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description: "Existing skill",
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sourceDir: "/tmp/plugin/skills/existing-skill",
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skillPath: "/tmp/plugin/skills/existing-skill/SKILL.md",
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},
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],
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hooks: undefined,
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mcpServers: {
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local: { command: "echo", args: ["hello"] },
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},
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}
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describe("convertClaudeToGemini", () => {
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test("converts agents to skills with SKILL.md frontmatter", () => {
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const bundle = convertClaudeToGemini(fixturePlugin, {
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agentMode: "subagent",
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inferTemperature: false,
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permissions: "none",
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})
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const skill = bundle.generatedSkills.find((s) => s.name === "security-reviewer")
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expect(skill).toBeDefined()
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const parsed = parseFrontmatter(skill!.content)
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expect(parsed.data.name).toBe("security-reviewer")
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expect(parsed.data.description).toBe("Security-focused agent")
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expect(parsed.body).toContain("Focus on vulnerabilities.")
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})
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test("agent with capabilities prepended to body", () => {
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const bundle = convertClaudeToGemini(fixturePlugin, {
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agentMode: "subagent",
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inferTemperature: false,
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permissions: "none",
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})
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const skill = bundle.generatedSkills.find((s) => s.name === "security-reviewer")
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expect(skill).toBeDefined()
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const parsed = parseFrontmatter(skill!.content)
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expect(parsed.body).toContain("## Capabilities")
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expect(parsed.body).toContain("- Threat modeling")
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expect(parsed.body).toContain("- OWASP")
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})
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test("agent with empty description gets default description", () => {
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const plugin: ClaudePlugin = {
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...fixturePlugin,
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agents: [
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{
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name: "my-agent",
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body: "Do things.",
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sourcePath: "/tmp/plugin/agents/my-agent.md",
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},
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],
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commands: [],
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skills: [],
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}
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const bundle = convertClaudeToGemini(plugin, {
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agentMode: "subagent",
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inferTemperature: false,
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permissions: "none",
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})
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const parsed = parseFrontmatter(bundle.generatedSkills[0].content)
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expect(parsed.data.description).toBe("Use this skill for my-agent tasks")
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})
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test("agent model field silently dropped", () => {
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const bundle = convertClaudeToGemini(fixturePlugin, {
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agentMode: "subagent",
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inferTemperature: false,
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permissions: "none",
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})
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const skill = bundle.generatedSkills.find((s) => s.name === "security-reviewer")
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const parsed = parseFrontmatter(skill!.content)
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expect(parsed.data.model).toBeUndefined()
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})
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test("agent with empty body gets default body text", () => {
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const plugin: ClaudePlugin = {
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...fixturePlugin,
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agents: [
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{
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name: "Empty Agent",
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description: "An empty agent",
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body: "",
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sourcePath: "/tmp/plugin/agents/empty.md",
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},
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],
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commands: [],
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skills: [],
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}
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const bundle = convertClaudeToGemini(plugin, {
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agentMode: "subagent",
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inferTemperature: false,
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permissions: "none",
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})
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const parsed = parseFrontmatter(bundle.generatedSkills[0].content)
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expect(parsed.body).toContain("Instructions converted from the Empty Agent agent.")
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})
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test("converts commands to TOML with prompt and description", () => {
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const bundle = convertClaudeToGemini(fixturePlugin, {
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agentMode: "subagent",
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inferTemperature: false,
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permissions: "none",
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})
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expect(bundle.commands).toHaveLength(1)
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const command = bundle.commands[0]
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expect(command.name).toBe("workflows/plan")
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expect(command.content).toContain('description = "Planning command"')
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expect(command.content).toContain('prompt = """')
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expect(command.content).toContain("Plan the work.")
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})
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test("namespaced command creates correct path", () => {
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const bundle = convertClaudeToGemini(fixturePlugin, {
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agentMode: "subagent",
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inferTemperature: false,
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permissions: "none",
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})
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const command = bundle.commands.find((c) => c.name === "workflows/plan")
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expect(command).toBeDefined()
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})
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test("command with argument-hint gets {{args}} placeholder", () => {
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const bundle = convertClaudeToGemini(fixturePlugin, {
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agentMode: "subagent",
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inferTemperature: false,
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permissions: "none",
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})
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const command = bundle.commands[0]
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expect(command.content).toContain("{{args}}")
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})
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test("command with disable-model-invocation is still included", () => {
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const plugin: ClaudePlugin = {
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...fixturePlugin,
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commands: [
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{
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name: "disabled-command",
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description: "Disabled command",
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disableModelInvocation: true,
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body: "Disabled body.",
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sourcePath: "/tmp/plugin/commands/disabled.md",
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},
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],
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agents: [],
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skills: [],
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}
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const bundle = convertClaudeToGemini(plugin, {
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agentMode: "subagent",
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inferTemperature: false,
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permissions: "none",
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})
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// Gemini TOML commands are prompts, not code — always include
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expect(bundle.commands).toHaveLength(1)
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expect(bundle.commands[0].name).toBe("disabled-command")
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})
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test("command allowedTools silently dropped", () => {
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const bundle = convertClaudeToGemini(fixturePlugin, {
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agentMode: "subagent",
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inferTemperature: false,
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permissions: "none",
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})
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const command = bundle.commands[0]
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expect(command.content).not.toContain("allowedTools")
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expect(command.content).not.toContain("Read")
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})
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test("skills pass through as directory references", () => {
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const bundle = convertClaudeToGemini(fixturePlugin, {
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agentMode: "subagent",
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inferTemperature: false,
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permissions: "none",
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})
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expect(bundle.skillDirs).toHaveLength(1)
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expect(bundle.skillDirs[0].name).toBe("existing-skill")
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expect(bundle.skillDirs[0].sourceDir).toBe("/tmp/plugin/skills/existing-skill")
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})
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test("MCP servers convert to settings.json-compatible config", () => {
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const bundle = convertClaudeToGemini(fixturePlugin, {
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agentMode: "subagent",
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inferTemperature: false,
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permissions: "none",
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})
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expect(bundle.mcpServers?.local?.command).toBe("echo")
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expect(bundle.mcpServers?.local?.args).toEqual(["hello"])
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})
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test("plugin with zero agents produces empty generatedSkills", () => {
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const plugin: ClaudePlugin = {
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...fixturePlugin,
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agents: [],
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commands: [],
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skills: [],
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}
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const bundle = convertClaudeToGemini(plugin, {
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agentMode: "subagent",
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inferTemperature: false,
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permissions: "none",
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})
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expect(bundle.generatedSkills).toHaveLength(0)
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})
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test("plugin with only skills works correctly", () => {
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const plugin: ClaudePlugin = {
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...fixturePlugin,
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agents: [],
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commands: [],
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}
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const bundle = convertClaudeToGemini(plugin, {
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agentMode: "subagent",
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inferTemperature: false,
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permissions: "none",
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})
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expect(bundle.generatedSkills).toHaveLength(0)
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expect(bundle.skillDirs).toHaveLength(1)
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expect(bundle.commands).toHaveLength(0)
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})
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test("hooks present emits console.warn", () => {
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const warnings: string[] = []
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const originalWarn = console.warn
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console.warn = (msg: string) => warnings.push(msg)
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const plugin: ClaudePlugin = {
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...fixturePlugin,
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hooks: { hooks: { PreToolUse: [{ matcher: "*", body: "hook body" }] } },
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agents: [],
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commands: [],
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skills: [],
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}
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convertClaudeToGemini(plugin, {
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agentMode: "subagent",
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inferTemperature: false,
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permissions: "none",
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})
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console.warn = originalWarn
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expect(warnings.some((w) => w.includes("Gemini"))).toBe(true)
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})
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})
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describe("transformContentForGemini", () => {
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test("transforms .claude/ paths to .gemini/", () => {
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const result = transformContentForGemini("Read .claude/settings.json for config.")
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expect(result).toContain(".gemini/settings.json")
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expect(result).not.toContain(".claude/")
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})
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test("transforms ~/.claude/ paths to ~/.gemini/", () => {
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const result = transformContentForGemini("Check ~/.claude/config for settings.")
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expect(result).toContain("~/.gemini/config")
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expect(result).not.toContain("~/.claude/")
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})
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test("transforms Task agent(args) to natural language skill reference", () => {
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const input = `Run these:
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- Task repo-research-analyst(feature_description)
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- Task learnings-researcher(feature_description)
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Task best-practices-researcher(topic)`
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const result = transformContentForGemini(input)
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expect(result).toContain("Use the repo-research-analyst skill to: feature_description")
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expect(result).toContain("Use the learnings-researcher skill to: feature_description")
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expect(result).toContain("Use the best-practices-researcher skill to: topic")
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expect(result).not.toContain("Task repo-research-analyst")
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})
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test("transforms @agent references to skill references", () => {
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const result = transformContentForGemini("Ask @security-sentinel for a review.")
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expect(result).toContain("the security-sentinel skill")
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expect(result).not.toContain("@security-sentinel")
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})
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})
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describe("toToml", () => {
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test("produces valid TOML with description and prompt", () => {
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const result = toToml("A description", "The prompt content")
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expect(result).toContain('description = "A description"')
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expect(result).toContain('prompt = """')
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expect(result).toContain("The prompt content")
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expect(result).toContain('"""')
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})
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test("escapes quotes in description", () => {
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const result = toToml('Say "hello"', "Prompt")
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expect(result).toContain('description = "Say \\"hello\\""')
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})
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})
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