feat: add tea CLI pull request tools

Add three tools for managing pull requests via the tea CLI:
- tea-pulls: list pull requests filtered by state
- tea-pr-get: get PR details with comments
- tea-pr-create: create a PR with title, branch, assignees, and labels

.opencode/tools/tea-pr-create.ts

@@ -0,0 +1,24 @@
+import { tool } from "@opencode-ai/plugin"
+import { $ } from "bun"
+
+export default tool({
+  description: "Create a pull request in the repository using tea CLI",
+  args: {
+    title: tool.schema.string().describe("PR title"),
+    head: tool.schema.string().optional().describe("Branch name of the PR source (defaults to current branch)"),
+    base: tool.schema.string().optional().describe("Branch name of the PR target (defaults to repository default branch)"),
+    description: tool.schema.string().optional().describe("PR description (supports markdown)"),
+    assignees: tool.schema.string().optional().describe("Comma-separated list of usernames to assign"),
+    labels: tool.schema.string().optional().describe("Comma-separated list of labels to assign"),
+  },
+  async execute(args) {
+    let cmd = [`tea`, `pulls`, `create`, `-t`, args.title]
+    if (args.head) cmd = [...cmd, `--head`, args.head]
+    if (args.base) cmd = [...cmd, `-b`, args.base]
+    if (args.description) cmd = [...cmd, `-d`, args.description]
+    if (args.assignees) cmd = [...cmd, `-a`, args.assignees]
+    if (args.labels) cmd = [...cmd, `-L`, args.labels]
+    const result = await $`${cmd}`.text()
+    return result.trim()
+  },
+})

.opencode/tools/tea-pr-get.ts

@@ -0,0 +1,13 @@
+import { tool } from "@opencode-ai/plugin"
+import { $ } from "bun"
+
+export default tool({
+  description: "Get a specific pull request with all details and comments using tea CLI",
+  args: {
+    pullNumber: tool.schema.number().describe("Pull request number/index"),
+  },
+  async execute(args) {
+    const result = await $`tea pulls ${args.pullNumber} --comments --output json`.text()
+    return result.trim()
+  },
+})

.opencode/tools/tea-pulls.ts

@@ -0,0 +1,14 @@
+import { tool } from "@opencode-ai/plugin"
+import { $ } from "bun"
+
+export default tool({
+  description: "List pull requests in the repository using tea CLI",
+  args: {
+    state: tool.schema.string().optional().describe("Filter by state (all|open|closed)"),
+  },
+  async execute(args) {
+    const state = args.state || "open"
+    const result = await $`tea pulls --state ${state} --output json`.text()
+    return result.trim()
+  },
+})