feat(gigacode): add AgentOS-backed OpenCode bridge

.claude/skills/update-acp/SKILL.md

@@ -0,0 +1,15 @@
+---
+name: update-acp
+description: Audit or update AgentOS against the latest stable ACP v1 schema, including its manual sidecar client, public types, and SDK-backed adapters.
+---
+
+# Update ACP
+
+1. Read `ACP_IMPLEMENTED_SCHEMA_VERSION` in `crates/agentos-sidecar/src/acp_extension.rs`.
+2. Find the latest `schema-v1.*` in [ACP releases](https://github.com/agentclientprotocol/agent-client-protocol/releases) and inspect its `schema.json` plus [`schema/v1/CHANGELOG.md`](https://github.com/agentclientprotocol/agent-client-protocol/blob/main/schema/v1/CHANGELOG.md). Separately check `npm view @agentclientprotocol/sdk version`, its published types, and its [changelog](https://github.com/agentclientprotocol/typescript-sdk/blob/main/CHANGELOG.md). Ignore unstable v2 and keep wire `protocolVersion` separate.
+3. Update together:
+   - Adapters/dependencies/tests: `registry/agent/` and `pnpm-lock.yaml`.
+   - Public types/client/tests: `packages/core/src/agent-session-types.ts`, `packages/core/src/agent-os.ts`, and `packages/core/tests/`.
+   - Manual JSON-RPC/compatibility/tests: `crates/agentos-sidecar/src/acp_extension.rs`, `crates/agentos-sidecar/tests/`, and `crates/agentos-sidecar-core/src/engine.rs`.
+   - Internal generated protocol only if its AgentOS extension contract changes: `crates/agentos-protocol/` and `packages/core/src/sidecar/`.
+4. Preserve unknown additive JSON fields, run scoped adapter/core/sidecar tests plus type checks, and update `ACP_IMPLEMENTED_SCHEMA_VERSION` only after the stable schema is fully audited and implemented.

CLAUDE.md

@@ -100,6 +100,29 @@ the guest — over inventing a softer fallback that hides the failure.
   reason. Fast tests where the configured safeguard fires should stay in the
   default suite.
 
+## Gigacode Performance Investigations
+
+- For cold-start latency, run `gigacode` directly and use the plain
+  `[gigacode]` phase lines and durations mirrored from `daemon.log` while the
+  client waits for provider bootstrap. These startup lines are intentionally
+  human-readable and separate from Pino session logs.
+- Investigate Gigacode latency from its per-session Pino JSONL logs, not by
+  inferring timing from the OpenCode screen or the aggregate `daemon.log`.
+- Logs live at
+  `~/.local/state/gigacode/session-logs/<open-code-session-id>.jsonl` by default,
+  or under `$GIGACODE_STATE_DIR/session-logs/` when that override is set.
+- Reproduce one turn in a fresh session, identify the newest log with
+  `ls -lt ~/.local/state/gigacode/session-logs`, then inspect its ordered
+  `event` and `durationMs` fields with `jq`.
+- Compare `rivet.actor.resolved`, `agentos.session.created`,
+  `agentos.prompt.completed`, `prompt.completed`, `session.idle`, and
+  `agentos.connection.disposed` before optimizing. The actor event measures
+  resolution of the shared per-cwd workspace actor; the ACP event measures the
+  distinct harness session created inside it.
+- Preserve the raw JSONL file when reporting a regression. Use
+  `GIGACODE_LOG_LEVEL` to change the Pino level; performance phase records are
+  emitted at `info`.
+
 ## Version Control
 
 - Commit and PR titles are plain conventional commits with no coding-agent

biome.json

@@ -4,6 +4,7 @@
 		"includes": [
 			"packages/**/*.ts",
 			"examples/**/*.ts",
+			"experiments/**/*.ts",
 			"!packages/core/src/sidecar/generated-protocol.ts",
 			"!_secure-exec-sibling",
 			"!/**/node_modules"

crates/agentos-actor-plugin/src/actions/contract_surface.rs

@@ -202,11 +202,34 @@ pub const ACTION_CONTRACTS: &[ActionContract] = &[
         ts_signature:
             "createSession: (c: Ctx, agentType: string, options?: CreateSessionOptions) => Promise<string>;",
     },
+    ActionContract {
+        name: "probeAgentConfig",
+        reply_shape: ReplyShape::Array,
+        ts_signature:
+            "probeAgentConfig: (c: Ctx, agentType: string, options?: CreateSessionOptions) => Promise<SessionConfigOption[]>;",
+    },
     ActionContract {
         name: "sendPrompt",
         reply_shape: ReplyShape::Object(&["response", "text"]),
         ts_signature: "sendPrompt: (c: Ctx, sessionId: string, text: string) => Promise<PromptResult>;",
     },
+    ActionContract {
+        name: "sendPromptAsync",
+        reply_shape: ReplyShape::Unit,
+        ts_signature: "sendPromptAsync: ( c: Ctx, sessionId: string, text: string, requestId: string, ) => Promise<void>;",
+    },
+    ActionContract {
+        name: "setSessionModel",
+        reply_shape: ReplyShape::Object(&["id", "jsonrpc", "result"]),
+        ts_signature:
+            "setSessionModel: (c: Ctx, sessionId: string, model: string) => Promise<JsonRpcResponse>;",
+    },
+    ActionContract {
+        name: "cancelSession",
+        reply_shape: ReplyShape::Object(&["id", "jsonrpc", "result"]),
+        ts_signature:
+            "cancelSession: (c: Ctx, sessionId: string) => Promise<JsonRpcResponse>;",
+    },
     ActionContract {
         name: "closeSession",
         reply_shape: ReplyShape::Unit,
@@ -259,6 +282,11 @@ pub const EVENT_CONTRACTS: &[EventContract] = &[
         payload_shape: ReplyShape::Object(&["event", "sessionId"]),
         ts_signature: "sessionEvent: SessionEventPayload;",
     },
+    EventContract {
+        name: "promptResult",
+        payload_shape: ReplyShape::Object(&["error", "requestId", "result"]),
+        ts_signature: "promptResult: PromptResultEventPayload;",
+    },
     EventContract {
         name: "permissionRequest",
         payload_shape: ReplyShape::Object(&["request", "sessionId"]),
@@ -366,9 +394,11 @@ const TYPE_IMPORTS: &[TsImport] = &[
         module: "@rivet-dev/agentos-core",
         names: &[
             "ExecResult",
+            "JsonRpcResponse",
             "PermissionReply",
             "ProcessInfo",
             "ProcessTreeNode",
+            "SessionConfigOption",
             "SpawnedProcessInfo",
             "VirtualStat",
         ],