Move adapter implementations into shared workspace packages

Extract claude-local and codex-local adapter code from cli/server/ui
into packages/adapters/ and packages/adapter-utils/. CLI, server, and
UI now import shared adapter logic instead of duplicating it. Removes
~1100 lines of duplicated code across packages. Register new packages
in pnpm workspace.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

packages/adapters/codex-local/src/ui/build-config.ts

@@ -0,0 +1,40 @@
+import type { CreateConfigValues } from "@paperclip/adapter-utils";
+
+function parseCommaArgs(value: string): string[] {
+  return value
+    .split(",")
+    .map((item) => item.trim())
+    .filter(Boolean);
+}
+
+function parseEnvVars(text: string): Record<string, string> {
+  const env: Record<string, string> = {};
+  for (const line of text.split(/\r?\n/)) {
+    const trimmed = line.trim();
+    if (!trimmed || trimmed.startsWith("#")) continue;
+    const eq = trimmed.indexOf("=");
+    if (eq <= 0) continue;
+    const key = trimmed.slice(0, eq).trim();
+    const value = trimmed.slice(eq + 1);
+    if (!/^[A-Za-z_][A-Za-z0-9_]*$/.test(key)) continue;
+    env[key] = value;
+  }
+  return env;
+}
+
+export function buildCodexLocalConfig(v: CreateConfigValues): Record<string, unknown> {
+  const ac: Record<string, unknown> = {};
+  if (v.cwd) ac.cwd = v.cwd;
+  if (v.promptTemplate) ac.promptTemplate = v.promptTemplate;
+  if (v.bootstrapPrompt) ac.bootstrapPromptTemplate = v.bootstrapPrompt;
+  if (v.model) ac.model = v.model;
+  ac.timeoutSec = 0;
+  ac.graceSec = 15;
+  const env = parseEnvVars(v.envVars);
+  if (Object.keys(env).length > 0) ac.env = env;
+  ac.search = v.search;
+  ac.dangerouslyBypassApprovalsAndSandbox = v.dangerouslyBypassSandbox;
+  if (v.command) ac.command = v.command;
+  if (v.extraArgs) ac.extraArgs = parseCommaArgs(v.extraArgs);
+  return ac;
+}