refactor: apply minimal tfcode branding

- Rename packages/opencode → packages/tfcode (directory only)
- Rename bin/opencode → bin/tfcode (CLI binary)
- Rename .opencode → .tfcode (config directory)
- Update package.json name and bin field
- Update config directory path references (.tfcode)
- Keep internal code references as 'opencode' for easy upstream sync
- Keep @opencode-ai/* workspace package names

This minimal branding approach allows clean merges from upstream
opencode repository while providing tfcode branding for users.

packages/tfcode/test/server/project-init-git.test.ts

@@ -0,0 +1,121 @@
+import { afterEach, describe, expect, spyOn, test } from "bun:test"
+import path from "path"
+import { GlobalBus } from "../../src/bus/global"
+import { Snapshot } from "../../src/snapshot"
+import { InstanceBootstrap } from "../../src/project/bootstrap"
+import { Instance } from "../../src/project/instance"
+import { Server } from "../../src/server/server"
+import { Filesystem } from "../../src/util/filesystem"
+import { Log } from "../../src/util/log"
+import { resetDatabase } from "../fixture/db"
+import { tmpdir } from "../fixture/fixture"
+
+Log.init({ print: false })
+
+afterEach(async () => {
+  await resetDatabase()
+})
+
+describe("project.initGit endpoint", () => {
+  test("initializes git and reloads immediately", async () => {
+    await using tmp = await tmpdir()
+    const app = Server.Default()
+    const seen: { directory?: string; payload: { type: string } }[] = []
+    const fn = (evt: { directory?: string; payload: { type: string } }) => {
+      seen.push(evt)
+    }
+    const reload = Instance.reload
+    const reloadSpy = spyOn(Instance, "reload").mockImplementation((input) => reload(input))
+    GlobalBus.on("event", fn)
+
+    try {
+      const init = await app.request("/project/git/init", {
+        method: "POST",
+        headers: {
+          "x-opencode-directory": tmp.path,
+        },
+      })
+      const body = await init.json()
+      expect(init.status).toBe(200)
+      expect(body).toMatchObject({
+        id: "global",
+        vcs: "git",
+        worktree: tmp.path,
+      })
+      expect(reloadSpy).toHaveBeenCalledTimes(1)
+      expect(reloadSpy.mock.calls[0]?.[0]?.init).toBe(InstanceBootstrap)
+      expect(seen.some((evt) => evt.directory === tmp.path && evt.payload.type === "server.instance.disposed")).toBe(
+        true,
+      )
+      expect(await Filesystem.exists(path.join(tmp.path, ".git", "opencode"))).toBe(false)
+
+      const current = await app.request("/project/current", {
+        headers: {
+          "x-opencode-directory": tmp.path,
+        },
+      })
+      expect(current.status).toBe(200)
+      expect(await current.json()).toMatchObject({
+        id: "global",
+        vcs: "git",
+        worktree: tmp.path,
+      })
+
+      await Instance.provide({
+        directory: tmp.path,
+        fn: async () => {
+          expect(await Snapshot.track()).toBeTruthy()
+        },
+      })
+    } finally {
+      await Instance.disposeAll()
+      reloadSpy.mockRestore()
+      GlobalBus.off("event", fn)
+    }
+  })
+
+  test("does not reload when the project is already git", async () => {
+    await using tmp = await tmpdir({ git: true })
+    const app = Server.Default()
+    const seen: { directory?: string; payload: { type: string } }[] = []
+    const fn = (evt: { directory?: string; payload: { type: string } }) => {
+      seen.push(evt)
+    }
+    const reload = Instance.reload
+    const reloadSpy = spyOn(Instance, "reload").mockImplementation((input) => reload(input))
+    GlobalBus.on("event", fn)
+
+    try {
+      const init = await app.request("/project/git/init", {
+        method: "POST",
+        headers: {
+          "x-opencode-directory": tmp.path,
+        },
+      })
+      expect(init.status).toBe(200)
+      expect(await init.json()).toMatchObject({
+        vcs: "git",
+        worktree: tmp.path,
+      })
+      expect(
+        seen.filter((evt) => evt.directory === tmp.path && evt.payload.type === "server.instance.disposed").length,
+      ).toBe(0)
+      expect(reloadSpy).toHaveBeenCalledTimes(0)
+
+      const current = await app.request("/project/current", {
+        headers: {
+          "x-opencode-directory": tmp.path,
+        },
+      })
+      expect(current.status).toBe(200)
+      expect(await current.json()).toMatchObject({
+        vcs: "git",
+        worktree: tmp.path,
+      })
+    } finally {
+      await Instance.disposeAll()
+      reloadSpy.mockRestore()
+      GlobalBus.off("event", fn)
+    }
+  })
+})