feat: add opencode local adapter support

packages/adapters/opencode-local/src/index.ts

@@ -0,0 +1,49 @@
+export const type = "opencode_local";
+export const label = "OpenCode (local)";
+export const DEFAULT_OPENCODE_LOCAL_MODEL = "openai/gpt-5.3-codex";
+
+export const models = [
+  { id: DEFAULT_OPENCODE_LOCAL_MODEL, label: DEFAULT_OPENCODE_LOCAL_MODEL },
+  { id: "openai/gpt-5.3-codex-spark", label: "openai/gpt-5.3-codex-spark" },
+  { id: "openai/gpt-5.2-codex", label: "openai/gpt-5.2-codex" },
+  { id: "openai/gpt-5.1-codex", label: "openai/gpt-5.1-codex" },
+  { id: "openai/gpt-5-codex", label: "openai/gpt-5-codex" },
+  { id: "openai/codex-mini-latest", label: "openai/codex-mini-latest" },
+  { id: "openai/gpt-5", label: "openai/gpt-5" },
+  { id: "openai/o3", label: "openai/o3" },
+  { id: "openai/o4-mini", label: "openai/o4-mini" },
+];
+
+export const agentConfigurationDoc = `# opencode_local agent configuration
+
+Adapter: opencode_local
+
+Use when:
+- You want Paperclip to run OpenCode locally as the agent runtime
+- You want provider/model routing in OpenCode format (provider/model)
+- You want OpenCode session resume across heartbeats via --session
+
+Don't use when:
+- You need webhook-style external invocation (use openclaw or http)
+- You only need one-shot shell commands (use process)
+- OpenCode CLI is not installed on the machine
+
+Core fields:
+- cwd (string, optional): default absolute working directory fallback for the agent process (created if missing when possible)
+- instructionsFilePath (string, optional): absolute path to a markdown instructions file prepended to the run prompt
+- model (string, optional): OpenCode model id in provider/model format (for example openai/gpt-5.3-codex)
+- variant (string, optional): provider-specific reasoning/profile variant passed as --variant
+- promptTemplate (string, optional): run prompt template
+- command (string, optional): defaults to "opencode"
+- extraArgs (string[], optional): additional CLI args
+- env (object, optional): KEY=VALUE environment variables
+
+Operational fields:
+- timeoutSec (number, optional): run timeout in seconds
+- graceSec (number, optional): SIGTERM grace period in seconds
+
+Notes:
+- Runs are executed with: opencode run --format json ...
+- Prompts are passed as the final positional message argument.
+- Sessions are resumed with --session when stored session cwd matches current cwd.
+`;