feat(aircoding): AirCoding V2 baseline — deterministic multi-agent architecture

Forked from OpenCode v1.17.4 with multi-agent system:
- 5 agents: aircoding, scheduler, worker, architect, reviewer
- Deterministic DAG scheduling engine (coordinator_tick)
- Tool whitelists as hard enforcement
- AirCoding validation plugin
- System prompt injection for routing
- V1 requirements: C4 docs, ADR, AGENTS.md, debug-log.md
- Design documents in docs/

packages/opencode/test/cli/error.test.ts

@@ -0,0 +1,95 @@
+import { describe, expect, test } from "bun:test"
+import { AccountTransportError } from "../../src/account/schema"
+import { FormatError } from "../../src/cli/error"
+import { UI } from "../../src/cli/ui"
+
+describe("cli.error", () => {
+  test("formats legacy and tagged config errors the same way", () => {
+    const cases = [
+      {
+        tag: "ConfigJsonError",
+        data: { path: "/tmp/opencode.jsonc", message: "Unexpected token" },
+        expected: "Config file at /tmp/opencode.jsonc is not valid JSON(C): Unexpected token",
+      },
+      {
+        tag: "ConfigDirectoryTypoError",
+        data: { path: "/tmp/opencode.jsonc", dir: ".opencode", suggestion: "opencode" },
+        expected:
+          'Directory ".opencode" in /tmp/opencode.jsonc is not valid. Rename the directory to "opencode" or remove it. This is a common typo.',
+      },
+      {
+        tag: "ConfigFrontmatterError",
+        data: { path: "/tmp/AGENTS.md", message: "failed frontmatter" },
+        expected: "failed frontmatter",
+      },
+      {
+        tag: "ConfigInvalidError",
+        data: {
+          path: "/tmp/opencode.jsonc",
+          message: "schema mismatch",
+          issues: [{ message: "Expected string", path: ["provider", "id"] }],
+        },
+        expected: "Configuration is invalid at /tmp/opencode.jsonc: schema mismatch\n↳ Expected string provider.id",
+      },
+    ]
+
+    for (const item of cases) {
+      expect(FormatError({ name: item.tag, data: item.data })).toBe(item.expected)
+      expect(FormatError({ _tag: item.tag, ...item.data })).toBe(item.expected)
+    }
+  })
+
+  test("preserves multiline JSONC diagnostics for tagged config errors", () => {
+    const data = {
+      path: "/tmp/opencode.jsonc",
+      message:
+        '\n--- JSONC Input ---\n{\n  "model": \n}\n--- Errors ---\nValueExpected at line 3, column 1\n   Line 3: }\n          ^\n--- End ---',
+    }
+    const expected = `Config file at ${data.path} is not valid JSON(C): ${data.message}`
+
+    expect(FormatError({ name: "ConfigJsonError", data })).toBe(expected)
+    expect(FormatError({ _tag: "ConfigJsonError", ...data })).toBe(expected)
+  })
+
+  test("formats account transport errors clearly", () => {
+    const error = new AccountTransportError({
+      method: "POST",
+      url: "https://console.opencode.ai/auth/device/code",
+    })
+
+    const formatted = FormatError(error)
+
+    expect(formatted).toContain("Could not reach POST https://console.opencode.ai/auth/device/code.")
+    expect(formatted).toContain("This failed before the server returned an HTTP response.")
+    expect(formatted).toContain("Check your network, proxy, or VPN configuration and try again.")
+  })
+
+  test("formats legacy and tagged provider model errors the same way", () => {
+    const data = {
+      providerID: "anthropic",
+      modelID: "claude-sonet-4",
+      suggestions: ["claude-sonnet-4"],
+    }
+    const expected = [
+      "Model not found: anthropic/claude-sonet-4",
+      "Did you mean: claude-sonnet-4",
+      "Try: `opencode models` to list available models",
+      "Or check your config (opencode.json) provider/model names",
+    ].join("\n")
+
+    expect(FormatError({ name: "ProviderModelNotFoundError", data })).toBe(expected)
+    expect(FormatError({ _tag: "ProviderModelNotFoundError", ...data })).toBe(expected)
+  })
+
+  test("formats legacy and tagged provider init errors the same way", () => {
+    const data = { providerID: "anthropic" }
+    const expected = 'Failed to initialize provider "anthropic". Check credentials and configuration.'
+
+    expect(FormatError({ name: "ProviderInitError", data })).toBe(expected)
+    expect(FormatError({ _tag: "ProviderInitError", ...data })).toBe(expected)
+  })
+
+  test("formats cancelled UI errors as empty output", () => {
+    expect(FormatError(new UI.CancelledError())).toBe("")
+  })
+})