// src/cli/App.tsx
import { existsSync, readFileSync } from "node:fs";
import { APIUserAbortError } from "@letta-ai/letta-client/core/error";
import type {
AgentState,
MessageCreate,
} from "@letta-ai/letta-client/resources/agents/agents";
import type {
ApprovalCreate,
Message,
} from "@letta-ai/letta-client/resources/agents/messages";
import type { LlmConfig } from "@letta-ai/letta-client/resources/models/models";
import { Box, Static } from "ink";
import { useCallback, useEffect, useMemo, useRef, useState } from "react";
import type { ApprovalResult } from "../agent/approval-execution";
import { getResumeData } from "../agent/check-approval";
import { getClient } from "../agent/client";
import type { AgentProvenance } from "../agent/create";
import { sendMessageStream } from "../agent/message";
import { linkToolsToAgent, unlinkToolsFromAgent } from "../agent/modify";
import { SessionStats } from "../agent/stats";
import type { ApprovalContext } from "../permissions/analyzer";
import { permissionMode } from "../permissions/mode";
import { updateProjectSettings } from "../settings";
import type { ToolExecutionResult } from "../tools/manager";
import {
analyzeToolApproval,
checkToolPermission,
executeTool,
savePermissionRule,
} from "../tools/manager";
import { AgentSelector } from "./components/AgentSelector";
import { ApprovalDialog } from "./components/ApprovalDialogRich";
import { AssistantMessage } from "./components/AssistantMessageRich";
import { CommandMessage } from "./components/CommandMessage";
import { EnterPlanModeDialog } from "./components/EnterPlanModeDialog";
import { ErrorMessage } from "./components/ErrorMessageRich";
import { Input } from "./components/InputRich";
import { ModelSelector } from "./components/ModelSelector";
import { PlanModeDialog } from "./components/PlanModeDialog";
import { QuestionDialog } from "./components/QuestionDialog";
import { ReasoningMessage } from "./components/ReasoningMessageRich";
import { ResumeSelector } from "./components/ResumeSelector";
import { SessionStats as SessionStatsComponent } from "./components/SessionStats";
import { StatusMessage } from "./components/StatusMessage";
import { SystemPromptSelector } from "./components/SystemPromptSelector";
import { ToolCallMessage } from "./components/ToolCallMessageRich";
import { ToolsetSelector } from "./components/ToolsetSelector";
import { UserMessage } from "./components/UserMessageRich";
import { WelcomeScreen } from "./components/WelcomeScreen";
import {
type Buffers,
createBuffers,
type Line,
markIncompleteToolsAsCancelled,
onChunk,
toLines,
} from "./helpers/accumulator";
import { backfillBuffers } from "./helpers/backfill";
import { formatErrorDetails } from "./helpers/errorFormatter";
import {
buildMessageContentFromDisplay,
clearPlaceholdersInText,
} from "./helpers/pasteRegistry";
import { generatePlanFilePath } from "./helpers/planName";
import { safeJsonParseOr } from "./helpers/safeJsonParse";
import { type ApprovalRequest, drainStreamWithResume } from "./helpers/stream";
import { getRandomThinkingMessage } from "./helpers/thinkingMessages";
import { useSuspend } from "./hooks/useSuspend/useSuspend.ts";
import { useTerminalWidth } from "./hooks/useTerminalWidth";
const CLEAR_SCREEN_AND_HOME = "\u001B[2J\u001B[H";
// Feature flag: Check for pending approvals before sending messages
// This prevents infinite thinking state when there's an orphaned approval
// Can be disabled if the latency check adds too much overhead
const CHECK_PENDING_APPROVALS_BEFORE_SEND = true;
// Feature flag: Eagerly cancel streams client-side when user presses ESC
// When true (default), immediately abort the stream after calling .cancel()
// This provides instant feedback to the user without waiting for backend acknowledgment
// When false, wait for backend to send "cancelled" stop_reason (useful for testing backend behavior)
const EAGER_CANCEL = true;
// tiny helper for unique ids (avoid overwriting prior user lines)
function uid(prefix: string) {
return `${prefix}-${Date.now().toString(36)}-${Math.random().toString(36).slice(2, 8)}`;
}
// Get plan mode system reminder if in plan mode
function getPlanModeReminder(): string {
if (permissionMode.getMode() !== "plan") {
return "";
}
const planFilePath = permissionMode.getPlanFilePath();
// Generate dynamic reminder with plan file path
return `
Plan mode is active. The user indicated that they do not want you to execute yet -- you MUST NOT make any edits (with the exception of the plan file mentioned below), run any non-readonly tools (including changing configs or making commits), or otherwise make any changes to the system. This supercedes any other instructions you have received.
## Plan File Info:
${planFilePath ? `No plan file exists yet. You should create your plan at ${planFilePath} using the Write tool.` : "No plan file path assigned."}
You should build your plan incrementally by writing to or editing this file. NOTE that this is the only file you are allowed to edit - other than this you are only allowed to take READ-ONLY actions.
**Plan File Guidelines:** The plan file should contain only your final recommended approach, not all alternatives considered. Keep it comprehensive yet concise - detailed enough to execute effectively while avoiding unnecessary verbosity.
## Enhanced Planning Workflow
### Phase 1: Initial Understanding
Goal: Gain a comprehensive understanding of the user's request by reading through code and asking them questions.
1. Understand the user's request thoroughly
2. Explore the codebase to understand existing patterns and relevant code
3. Use AskUserQuestion tool to clarify ambiguities in the user request up front.
### Phase 2: Planning
Goal: Come up with an approach to solve the problem identified in phase 1.
- Provide any background context that may help with the task without prescribing the exact design itself
- Create a detailed plan
### Phase 3: Synthesis
Goal: Synthesize the perspectives from Phase 2, and ensure that it aligns with the user's intentions by asking them questions.
1. Collect all findings from exploration
2. Keep track of critical files that should be read before implementing the plan
3. Use AskUserQuestion to ask the user questions about trade offs.
### Phase 4: Final Plan
Once you have all the information you need, ensure that the plan file has been updated with your synthesized recommendation including:
- Recommended approach with rationale
- Key insights from different perspectives
- Critical files that need modification
### Phase 5: Call ExitPlanMode
At the very end of your turn, once you have asked the user questions and are happy with your final plan file - you should always call ExitPlanMode to indicate to the user that you are done planning.
This is critical - your turn should only end with either asking the user a question or calling ExitPlanMode. Do not stop unless it's for these 2 reasons.
NOTE: At any point in time through this workflow you should feel free to ask the user questions or clarifications. Don't make large assumptions about user intent. The goal is to present a well researched plan to the user, and tie any loose ends before implementation begins.
`;
}
// Read plan content from the plan file
function readPlanFile(): string {
const planFilePath = permissionMode.getPlanFilePath();
if (!planFilePath) {
return "No plan file path set.";
}
if (!existsSync(planFilePath)) {
return `Plan file not found at ${planFilePath}`;
}
try {
return readFileSync(planFilePath, "utf-8");
} catch {
return `Failed to read plan file at ${planFilePath}`;
}
}
// Fancy UI tools require specialized dialogs instead of the standard ApprovalDialog
function isFancyUITool(name: string): boolean {
return (
name === "AskUserQuestion" ||
name === "EnterPlanMode" ||
name === "ExitPlanMode"
);
}
// Extract questions from AskUserQuestion tool args
function getQuestionsFromApproval(approval: ApprovalRequest) {
const parsed = safeJsonParseOr>(
approval.toolArgs,
{},
);
return (
(parsed.questions as Array<{
question: string;
header: string;
options: Array<{ label: string; description: string }>;
multiSelect: boolean;
}>) || []
);
}
// Get skill unload reminder if skills are loaded (using cached flag)
function getSkillUnloadReminder(): string {
const { hasLoadedSkills } = require("../agent/context");
if (hasLoadedSkills()) {
const { SKILL_UNLOAD_REMINDER } = require("../agent/promptAssets");
return SKILL_UNLOAD_REMINDER;
}
return "";
}
// Items that have finished rendering and no longer change
type StaticItem =
| {
kind: "welcome";
id: string;
snapshot: {
continueSession: boolean;
agentState?: AgentState | null;
agentProvenance?: AgentProvenance | null;
terminalWidth: number;
};
}
| Line;
export default function App({
agentId: initialAgentId,
agentState: initialAgentState,
loadingState = "ready",
continueSession = false,
startupApproval = null,
startupApprovals = [],
messageHistory = [],
tokenStreaming = true,
agentProvenance = null,
}: {
agentId: string;
agentState?: AgentState | null;
loadingState?:
| "assembling"
| "upserting"
| "linking"
| "unlinking"
| "initializing"
| "checking"
| "ready";
continueSession?: boolean;
startupApproval?: ApprovalRequest | null; // Deprecated: use startupApprovals
startupApprovals?: ApprovalRequest[];
messageHistory?: Message[];
tokenStreaming?: boolean;
agentProvenance?: AgentProvenance | null;
}) {
// Track current agent (can change when swapping)
const [agentId, setAgentId] = useState(initialAgentId);
const [agentState, setAgentState] = useState(initialAgentState);
const resumeKey = useSuspend();
// Sync with prop changes (e.g., when parent updates from "loading" to actual ID)
useEffect(() => {
if (initialAgentId !== agentId) {
setAgentId(initialAgentId);
}
}, [initialAgentId, agentId]);
useEffect(() => {
if (initialAgentState !== agentState) {
setAgentState(initialAgentState);
}
}, [initialAgentState, agentState]);
// Whether a stream is in flight (disables input)
const [streaming, setStreaming] = useState(false);
// Whether an interrupt has been requested for the current stream
const [interruptRequested, setInterruptRequested] = useState(false);
// Whether a command is running (disables input but no streaming UI)
const [commandRunning, setCommandRunning] = useState(false);
// If we have approval requests, we should show the approval dialog instead of the input area
const [pendingApprovals, setPendingApprovals] = useState(
[],
);
const [approvalContexts, setApprovalContexts] = useState(
[],
);
// Sequential approval: track results as user reviews each approval
const [approvalResults, setApprovalResults] = useState<
Array<
| { type: "approve"; approval: ApprovalRequest }
| { type: "deny"; approval: ApprovalRequest; reason: string }
>
>([]);
const [isExecutingTool, setIsExecutingTool] = useState(false);
const [queuedApprovalResults, setQueuedApprovalResults] = useState<
ApprovalResult[] | null
>(null);
const toolAbortControllerRef = useRef(null);
// Track auto-handled results to combine with user decisions
const [autoHandledResults, setAutoHandledResults] = useState<
Array<{
toolCallId: string;
result: ToolExecutionResult;
}>
>([]);
const [autoDeniedApprovals, setAutoDeniedApprovals] = useState<
Array<{
approval: ApprovalRequest;
reason: string;
}>
>([]);
// Derive current approval from pending approvals and results
// This is the approval currently being shown to the user
const currentApproval = pendingApprovals[approvalResults.length];
// Model selector state
const [modelSelectorOpen, setModelSelectorOpen] = useState(false);
const [toolsetSelectorOpen, setToolsetSelectorOpen] = useState(false);
const [systemPromptSelectorOpen, setSystemPromptSelectorOpen] =
useState(false);
const [currentSystemPromptId, setCurrentSystemPromptId] = useState<
string | null
>("default");
const [currentToolset, setCurrentToolset] = useState<
"codex" | "codex_snake" | "default" | "gemini" | "gemini_snake" | null
>(null);
const [llmConfig, setLlmConfig] = useState(null);
const [agentName, setAgentName] = useState(null);
const currentModelLabel =
llmConfig?.model_endpoint_type && llmConfig?.model
? `${llmConfig.model_endpoint_type}/${llmConfig.model}`
: (llmConfig?.model ?? null);
const currentModelDisplay = currentModelLabel?.split("/").pop() ?? null;
// Agent selector state
const [agentSelectorOpen, setAgentSelectorOpen] = useState(false);
// Resume selector state
const [resumeSelectorOpen, setResumeSelectorOpen] = useState(false);
// Token streaming preference (can be toggled at runtime)
const [tokenStreamingEnabled, setTokenStreamingEnabled] =
useState(tokenStreaming);
// Live, approximate token counter (resets each turn)
const [tokenCount, setTokenCount] = useState(0);
// Current thinking message (rotates each turn)
const [thinkingMessage, setThinkingMessage] = useState(
getRandomThinkingMessage(),
);
// Session stats tracking
const sessionStatsRef = useRef(new SessionStats());
// Show exit stats on exit
const [showExitStats, setShowExitStats] = useState(false);
// Static items (things that are done rendering and can be frozen)
const [staticItems, setStaticItems] = useState([]);
// Track committed ids to avoid duplicates
const emittedIdsRef = useRef>(new Set());
// Guard to append welcome snapshot only once
const welcomeCommittedRef = useRef(false);
// AbortController for stream cancellation
const abortControllerRef = useRef(null);
// Track if user wants to cancel (persists across state updates)
const userCancelledRef = useRef(false);
// Message queue state for queueing messages during streaming
const [messageQueue, setMessageQueue] = useState([]);
// Queue cancellation: when queue length > 1, we send cancel and wait for natural stream end
const waitingForQueueCancelRef = useRef(false);
const queueSnapshotRef = useRef([]);
const [restoreQueueOnCancel, setRestoreQueueOnCancel] = useState(false);
const restoreQueueOnCancelRef = useRef(restoreQueueOnCancel);
useEffect(() => {
restoreQueueOnCancelRef.current = restoreQueueOnCancel;
}, [restoreQueueOnCancel]);
// Track terminal shrink events to refresh static output (prevents wrapped leftovers)
const columns = useTerminalWidth();
const prevColumnsRef = useRef(columns);
const [staticRenderEpoch, setStaticRenderEpoch] = useState(0);
useEffect(() => {
const prev = prevColumnsRef.current;
if (columns === prev) return;
if (
columns < prev &&
typeof process !== "undefined" &&
process.stdout &&
"write" in process.stdout &&
process.stdout.isTTY
) {
process.stdout.write(CLEAR_SCREEN_AND_HOME);
}
setStaticRenderEpoch((epoch) => epoch + 1);
prevColumnsRef.current = columns;
}, [columns]);
// Commit immutable/finished lines into the historical log
const commitEligibleLines = useCallback((b: Buffers) => {
const newlyCommitted: StaticItem[] = [];
for (const id of b.order) {
if (emittedIdsRef.current.has(id)) continue;
const ln = b.byId.get(id);
if (!ln) continue;
if (ln.kind === "user" || ln.kind === "error" || ln.kind === "status") {
emittedIdsRef.current.add(id);
newlyCommitted.push({ ...ln });
continue;
}
// Commands with phase should only commit when finished
if (ln.kind === "command") {
if (!ln.phase || ln.phase === "finished") {
emittedIdsRef.current.add(id);
newlyCommitted.push({ ...ln });
}
continue;
}
if ("phase" in ln && ln.phase === "finished") {
emittedIdsRef.current.add(id);
newlyCommitted.push({ ...ln });
}
}
if (newlyCommitted.length > 0) {
setStaticItems((prev) => [...prev, ...newlyCommitted]);
}
}, []);
// Render-ready transcript
const [lines, setLines] = useState([]);
// Canonical buffers stored in a ref (mutated by onChunk), PERSISTED for session
const buffersRef = useRef(createBuffers());
// Track whether we've already backfilled history (should only happen once)
const hasBackfilledRef = useRef(false);
// Recompute UI state from buffers after chunks (micro-batched)
const refreshDerived = useCallback(() => {
const b = buffersRef.current;
setTokenCount(b.tokenCount);
const newLines = toLines(b);
setLines(newLines);
commitEligibleLines(b);
}, [commitEligibleLines]);
// Throttled version for streaming updates (~60fps max)
const refreshDerivedThrottled = useCallback(() => {
// Use a ref to track pending refresh
if (!buffersRef.current.pendingRefresh) {
buffersRef.current.pendingRefresh = true;
setTimeout(() => {
buffersRef.current.pendingRefresh = false;
refreshDerived();
}, 16); // ~60fps
}
}, [refreshDerived]);
// Restore pending approval from startup when ready
// All approvals (including fancy UI tools) go through pendingApprovals
// The render logic determines which UI to show based on tool name
useEffect(() => {
// Use new plural field if available, otherwise wrap singular in array for backward compat
const approvals =
startupApprovals?.length > 0
? startupApprovals
: startupApproval
? [startupApproval]
: [];
if (loadingState === "ready" && approvals.length > 0) {
// All approvals go through the same flow - UI rendering decides which dialog to show
setPendingApprovals(approvals);
// Analyze approval contexts for all restored approvals
const analyzeStartupApprovals = async () => {
try {
const contexts = await Promise.all(
approvals.map(async (approval) => {
const parsedArgs = safeJsonParseOr>(
approval.toolArgs,
{},
);
return await analyzeToolApproval(approval.toolName, parsedArgs);
}),
);
setApprovalContexts(contexts);
} catch (error) {
// If analysis fails, leave context as null (will show basic options)
console.error("Failed to analyze startup approvals:", error);
}
};
analyzeStartupApprovals();
}
}, [loadingState, startupApproval, startupApprovals]);
// Backfill message history when resuming (only once)
useEffect(() => {
if (
loadingState === "ready" &&
messageHistory.length > 0 &&
!hasBackfilledRef.current
) {
// Set flag FIRST to prevent double-execution in strict mode
hasBackfilledRef.current = true;
// Append welcome snapshot FIRST so it appears above history
if (!welcomeCommittedRef.current) {
welcomeCommittedRef.current = true;
setStaticItems((prev) => [
...prev,
{
kind: "welcome",
id: `welcome-${Date.now().toString(36)}`,
snapshot: {
continueSession,
agentState,
agentProvenance,
terminalWidth: columns,
},
},
]);
}
// Use backfillBuffers to properly populate the transcript from history
backfillBuffers(buffersRef.current, messageHistory);
// Inject "showing N messages" status at the START of backfilled history
const backfillStatusId = `status-backfill-${Date.now().toString(36)}`;
const messageCount = messageHistory.length;
const agentUrl = agentState?.id
? `https://app.letta.com/agents/${agentState.id}`
: null;
const backfillLines = [
`Showing ${messageCount} most recent message${messageCount !== 1 ? "s" : ""}`,
agentUrl
? ` → View full history in ADE: ${agentUrl}`
: " → View full history in ADE",
];
buffersRef.current.byId.set(backfillStatusId, {
kind: "status",
id: backfillStatusId,
lines: backfillLines,
});
// Insert at the beginning of the order array
buffersRef.current.order.unshift(backfillStatusId);
refreshDerived();
commitEligibleLines(buffersRef.current);
}
}, [
loadingState,
messageHistory,
refreshDerived,
commitEligibleLines,
continueSession,
columns,
agentState,
agentProvenance,
]);
// Fetch llmConfig when agent is ready
useEffect(() => {
if (loadingState === "ready" && agentId && agentId !== "loading") {
const fetchConfig = async () => {
try {
const { getClient } = await import("../agent/client");
const client = await getClient();
const agent = await client.agents.retrieve(agentId);
setLlmConfig(agent.llm_config);
setAgentName(agent.name);
// Detect current toolset from attached tools
const { detectToolsetFromAgent } = await import("../tools/toolset");
const detected = await detectToolsetFromAgent(client, agentId);
if (detected) {
setCurrentToolset(detected);
}
} catch (error) {
console.error("Error fetching agent config:", error);
}
};
fetchConfig();
}
}, [loadingState, agentId]);
// Helper to append an error to the transcript
const appendError = useCallback(
(message: string) => {
const id = uid("err");
buffersRef.current.byId.set(id, {
kind: "error",
id,
text: message,
});
buffersRef.current.order.push(id);
refreshDerived();
},
[refreshDerived],
);
// Core streaming function - iterative loop that processes conversation turns
const processConversation = useCallback(
async (
initialInput: Array,
): Promise => {
const currentInput = initialInput;
try {
// Check if user hit escape before we started
if (userCancelledRef.current) {
userCancelledRef.current = false; // Reset for next time
return;
}
setStreaming(true);
abortControllerRef.current = new AbortController();
// Clear any stale pending tool calls from previous turns
// If we're sending a new message, old pending state is no longer relevant
markIncompleteToolsAsCancelled(buffersRef.current);
while (true) {
// Check if cancelled before starting new stream
if (abortControllerRef.current?.signal.aborted) {
setStreaming(false);
return;
}
// Stream one turn
const stream = await sendMessageStream(agentId, currentInput);
const { stopReason, approval, approvals, apiDurationMs, lastRunId } =
await drainStreamWithResume(
stream,
buffersRef.current,
refreshDerivedThrottled,
abortControllerRef.current?.signal,
);
// Track API duration
sessionStatsRef.current.endTurn(apiDurationMs);
sessionStatsRef.current.updateUsageFromBuffers(buffersRef.current);
// Immediate refresh after stream completes to show final state
refreshDerived();
// Case 1: Turn ended normally
if (stopReason === "end_turn") {
setStreaming(false);
// Check if we were waiting for cancel but stream finished naturally
if (waitingForQueueCancelRef.current) {
if (restoreQueueOnCancelRef.current) {
// User hit ESC during queue cancel - abort the auto-send
setRestoreQueueOnCancel(false);
// Don't clear queue, don't send - let dequeue effect handle them one by one
} else {
// Auto-send concatenated message
// Clear the queue
setMessageQueue([]);
// Concatenate the snapshot
const concatenatedMessage = queueSnapshotRef.current.join("\n");
if (concatenatedMessage.trim()) {
onSubmitRef.current(concatenatedMessage);
}
}
// Reset flags
waitingForQueueCancelRef.current = false;
queueSnapshotRef.current = [];
}
return;
}
// Case 1.5: Stream was cancelled by user
if (stopReason === "cancelled") {
setStreaming(false);
// Check if this cancel was triggered by queue threshold
if (waitingForQueueCancelRef.current) {
if (restoreQueueOnCancelRef.current) {
// User hit ESC during queue cancel - abort the auto-send
setRestoreQueueOnCancel(false);
// Don't clear queue, don't send - let dequeue effect handle them one by one
} else {
// Auto-send concatenated message
// Clear the queue
setMessageQueue([]);
// Concatenate the snapshot
const concatenatedMessage = queueSnapshotRef.current.join("\n");
if (concatenatedMessage.trim()) {
onSubmitRef.current(concatenatedMessage);
}
}
// Reset flags
waitingForQueueCancelRef.current = false;
queueSnapshotRef.current = [];
} else {
// Regular user cancellation - show error
if (!EAGER_CANCEL) {
appendError("Stream interrupted by user");
}
}
return;
}
// Case 2: Requires approval
if (stopReason === "requires_approval") {
// Clear stale state immediately to prevent ID mismatch bugs
setAutoHandledResults([]);
setAutoDeniedApprovals([]);
// Use new approvals array, fallback to legacy approval for backward compat
const approvalsToProcess =
approvals && approvals.length > 0
? approvals
: approval
? [approval]
: [];
if (approvalsToProcess.length === 0) {
appendError(
`Unexpected empty approvals with stop reason: ${stopReason}`,
);
setStreaming(false);
return;
}
// Check permissions for all approvals (including fancy UI tools)
const approvalResults = await Promise.all(
approvalsToProcess.map(async (approvalItem) => {
// Check if approval is incomplete (missing name or arguments)
if (!approvalItem.toolName || !approvalItem.toolArgs) {
return {
approval: approvalItem,
permission: {
decision: "deny" as const,
reason:
"Tool call incomplete - missing name or arguments",
},
context: null,
};
}
const parsedArgs = safeJsonParseOr>(
approvalItem.toolArgs,
{},
);
const permission = await checkToolPermission(
approvalItem.toolName,
parsedArgs,
);
const context = await analyzeToolApproval(
approvalItem.toolName,
parsedArgs,
);
return { approval: approvalItem, permission, context };
}),
);
// Categorize approvals by permission decision
// Fancy UI tools should always go through their dialog, even if auto-allowed
const needsUserInput: typeof approvalResults = [];
const autoDenied: typeof approvalResults = [];
const autoAllowed: typeof approvalResults = [];
for (const ac of approvalResults) {
const { approval, permission } = ac;
let decision = permission.decision;
// Fancy tools should always go through a UI dialog in interactive mode,
// even if a rule says "allow". Deny rules are still respected.
if (isFancyUITool(approval.toolName) && decision === "allow") {
decision = "ask";
}
if (decision === "ask") {
needsUserInput.push(ac);
} else if (decision === "deny") {
autoDenied.push(ac);
} else {
// decision === "allow"
autoAllowed.push(ac);
}
}
// Execute auto-allowed tools
const autoAllowedResults = await Promise.all(
autoAllowed.map(async (ac) => {
const parsedArgs = safeJsonParseOr>(
ac.approval.toolArgs,
{},
);
const result = await executeTool(
ac.approval.toolName,
parsedArgs,
);
// Update buffers with tool return for UI
onChunk(buffersRef.current, {
message_type: "tool_return_message",
id: "dummy",
date: new Date().toISOString(),
tool_call_id: ac.approval.toolCallId,
tool_return: result.toolReturn,
status: result.status,
stdout: result.stdout,
stderr: result.stderr,
});
return {
toolCallId: ac.approval.toolCallId,
result,
};
}),
);
// Create denial results for auto-denied tools and update buffers
const autoDeniedResults = autoDenied.map((ac) => {
const reason =
"matchedRule" in ac.permission && ac.permission.matchedRule
? `Permission denied by rule: ${ac.permission.matchedRule}`
: `Permission denied: ${ac.permission.reason || "Unknown reason"}`;
// Update buffers with tool rejection for UI
onChunk(buffersRef.current, {
message_type: "tool_return_message",
id: "dummy",
date: new Date().toISOString(),
tool_call_id: ac.approval.toolCallId,
tool_return: `Error: request to call tool denied. User reason: ${reason}`,
status: "error",
stdout: null,
stderr: null,
});
return {
approval: ac.approval,
reason,
};
});
// If all are auto-handled, continue immediately without showing dialog
if (needsUserInput.length === 0) {
// Check if user cancelled before continuing
if (
userCancelledRef.current ||
abortControllerRef.current?.signal.aborted
) {
setStreaming(false);
markIncompleteToolsAsCancelled(buffersRef.current);
refreshDerived();
return;
}
// Rotate to a new thinking message
setThinkingMessage(getRandomThinkingMessage());
refreshDerived();
// Combine auto-allowed results + auto-denied responses
const allResults = [
...autoAllowedResults.map((ar) => ({
type: "tool" as const,
tool_call_id: ar.toolCallId,
tool_return: ar.result.toolReturn,
status: ar.result.status,
stdout: ar.result.stdout,
stderr: ar.result.stderr,
})),
...autoDeniedResults.map((ad) => ({
type: "approval" as const,
tool_call_id: ad.approval.toolCallId,
approve: false,
reason: ad.reason,
})),
];
await processConversation([
{
type: "approval",
approvals: allResults,
},
]);
return;
}
// Show approval dialog for tools that need user input
setPendingApprovals(needsUserInput.map((ac) => ac.approval));
setApprovalContexts(
needsUserInput
.map((ac) => ac.context)
.filter((ctx): ctx is ApprovalContext => ctx !== null),
);
setAutoHandledResults(autoAllowedResults);
setAutoDeniedApprovals(autoDeniedResults);
setStreaming(false);
return;
}
// Unexpected stop reason (error, llm_api_error, etc.)
// Mark incomplete tool calls as finished to prevent stuck blinking UI
markIncompleteToolsAsCancelled(buffersRef.current);
// Fetch error details from the run if available
if (lastRunId) {
try {
const client = await getClient();
const run = await client.runs.retrieve(lastRunId);
// Check if run has error information in metadata
if (run.metadata?.error) {
const errorData = run.metadata.error as {
type?: string;
message?: string;
detail?: string;
};
// Pass structured error data to our formatter
const errorObject = {
error: {
error: errorData,
run_id: lastRunId,
},
};
const errorDetails = formatErrorDetails(errorObject, agentId);
appendError(errorDetails);
} else {
// No error metadata, show generic error with run info
appendError(
`An error occurred during agent execution\n(run_id: ${lastRunId}, stop_reason: ${stopReason})`,
);
}
} catch (_e) {
// If we can't fetch error details, show generic error
appendError(
`An error occurred during agent execution\n(run_id: ${lastRunId}, stop_reason: ${stopReason})\n(Unable to fetch additional error details from server)`,
);
return;
}
} else {
// No run_id available - but this is unusual since errors should have run_ids
appendError(
`An error occurred during agent execution\n(stop_reason: ${stopReason})`,
);
}
setStreaming(false);
refreshDerived();
return;
}
} catch (e) {
// Mark incomplete tool calls as cancelled to prevent stuck blinking UI
markIncompleteToolsAsCancelled(buffersRef.current);
// If using eager cancel and this is an abort error, silently ignore it
// The user already got "Stream interrupted by user" feedback from handleInterrupt
if (EAGER_CANCEL && e instanceof APIUserAbortError) {
setStreaming(false);
refreshDerived();
return;
}
// Use comprehensive error formatting
const errorDetails = formatErrorDetails(e, agentId);
appendError(errorDetails);
setStreaming(false);
refreshDerived();
} finally {
abortControllerRef.current = null;
}
},
[agentId, appendError, refreshDerived, refreshDerivedThrottled],
);
const handleExit = useCallback(() => {
setShowExitStats(true);
// Give React time to render the stats, then exit
setTimeout(() => {
process.exit(0);
}, 100);
}, []);
// Handler when user presses UP/ESC to load queue into input for editing
const handleEnterQueueEditMode = useCallback(() => {
setMessageQueue([]);
}, []);
const handleInterrupt = useCallback(async () => {
// If we're executing client-side tools, abort them locally instead of hitting the backend
if (isExecutingTool && toolAbortControllerRef.current) {
toolAbortControllerRef.current.abort();
setStreaming(false);
setIsExecutingTool(false);
appendError("Stream interrupted by user");
refreshDerived();
return;
}
if (!streaming || interruptRequested) return;
// If we're in the middle of queue cancel, set flag to restore instead of auto-send
if (waitingForQueueCancelRef.current) {
setRestoreQueueOnCancel(true);
// Don't reset flags - let the cancel complete naturally
}
// If EAGER_CANCEL is enabled, immediately stop everything client-side first
if (EAGER_CANCEL) {
// Abort the stream via abort signal
if (abortControllerRef.current) {
abortControllerRef.current.abort();
}
// Set cancellation flag to prevent processConversation from starting
userCancelledRef.current = true;
// Stop streaming and show error message
setStreaming(false);
markIncompleteToolsAsCancelled(buffersRef.current);
appendError("Stream interrupted by user");
refreshDerived();
// Clear any pending approvals since we're cancelling
setPendingApprovals([]);
setApprovalContexts([]);
setApprovalResults([]);
setAutoHandledResults([]);
setAutoDeniedApprovals([]);
// Send cancel request to backend asynchronously (fire-and-forget)
// Don't wait for it or show errors since user already got feedback
getClient()
.then((client) => client.agents.messages.cancel(agentId))
.catch(() => {
// Silently ignore - cancellation already happened client-side
});
return;
} else {
setInterruptRequested(true);
try {
const client = await getClient();
await client.agents.messages.cancel(agentId);
if (abortControllerRef.current) {
abortControllerRef.current.abort();
}
} catch (e) {
const errorDetails = formatErrorDetails(e, agentId);
appendError(`Failed to interrupt stream: ${errorDetails}`);
setInterruptRequested(false);
}
}
}, [
agentId,
streaming,
interruptRequested,
appendError,
isExecutingTool,
refreshDerived,
]);
// Keep ref to latest processConversation to avoid circular deps in useEffect
const processConversationRef = useRef(processConversation);
useEffect(() => {
processConversationRef.current = processConversation;
}, [processConversation]);
// Reset interrupt flag when streaming ends
useEffect(() => {
if (!streaming) {
setInterruptRequested(false);
}
}, [streaming]);
const onSubmit = useCallback(
async (message?: string): Promise<{ submitted: boolean }> => {
const msg = message?.trim() ?? "";
if (!msg) return { submitted: false };
// Block submission if waiting for explicit user action (approvals)
// In this case, input is hidden anyway, so this shouldn't happen
if (pendingApprovals.length > 0) {
return { submitted: false };
}
// Queue message if agent is busy (streaming, executing tool, or running command)
// This allows messages to queue up while agent is working
const agentBusy = streaming || isExecutingTool || commandRunning;
if (agentBusy) {
setMessageQueue((prev) => {
const newQueue = [...prev, msg];
// If queue grows to 2+ messages and we're not already waiting for cancel,
// send cancel request and capture snapshot
if (newQueue.length > 1 && !waitingForQueueCancelRef.current) {
// Capture snapshot of queue right now
queueSnapshotRef.current = [...newQueue];
waitingForQueueCancelRef.current = true;
// Send cancel request to backend (fire-and-forget)
getClient()
.then((client) => client.agents.messages.cancel(agentId))
.then(() => {})
.catch(() => {
// Reset flag if cancel fails
waitingForQueueCancelRef.current = false;
});
}
return newQueue;
});
return { submitted: true }; // Clears input
}
// Reset cancellation flag when starting new submission
// This ensures that after an interrupt, new messages can be sent
userCancelledRef.current = false;
// Handle commands (messages starting with "/")
if (msg.startsWith("/")) {
const trimmed = msg.trim();
// Special handling for /model command - opens selector
if (trimmed === "/model") {
setModelSelectorOpen(true);
return { submitted: true };
}
// Special handling for /toolset command - opens selector
if (trimmed === "/toolset") {
setToolsetSelectorOpen(true);
return { submitted: true };
}
// Special handling for /system command - opens system prompt selector
if (trimmed === "/system") {
setSystemPromptSelectorOpen(true);
return { submitted: true };
}
// Special handling for /agent command - show agent link
if (trimmed === "/agent") {
const cmdId = uid("cmd");
const agentUrl = `https://app.letta.com/projects/default-project/agents/${agentId}`;
buffersRef.current.byId.set(cmdId, {
kind: "command",
id: cmdId,
input: msg,
output: agentUrl,
phase: "finished",
success: true,
});
buffersRef.current.order.push(cmdId);
refreshDerived();
return { submitted: true };
}
// Special handling for /exit command - show stats and exit
if (trimmed === "/exit") {
handleExit();
return { submitted: true };
}
// Special handling for /logout command - clear credentials and exit
if (trimmed === "/logout") {
const cmdId = uid("cmd");
buffersRef.current.byId.set(cmdId, {
kind: "command",
id: cmdId,
input: msg,
output: "Logging out...",
phase: "running",
});
buffersRef.current.order.push(cmdId);
refreshDerived();
setCommandRunning(true);
try {
const { settingsManager } = await import("../settings-manager");
const currentSettings = settingsManager.getSettings();
// Revoke refresh token on server if we have one
if (currentSettings.refreshToken) {
const { revokeToken } = await import("../auth/oauth");
await revokeToken(currentSettings.refreshToken);
}
// Clear local credentials
const newEnv = { ...currentSettings.env };
delete newEnv.LETTA_API_KEY;
// Note: LETTA_BASE_URL is intentionally NOT deleted from settings
// because it should not be stored there in the first place
settingsManager.updateSettings({
env: newEnv,
refreshToken: undefined,
tokenExpiresAt: undefined,
});
buffersRef.current.byId.set(cmdId, {
kind: "command",
id: cmdId,
input: msg,
output:
"✓ Logged out successfully. Run 'letta' to re-authenticate.",
phase: "finished",
success: true,
});
refreshDerived();
// Exit after a brief delay to show the message
setTimeout(() => process.exit(0), 500);
} catch (error) {
const errorDetails = formatErrorDetails(error, agentId);
buffersRef.current.byId.set(cmdId, {
kind: "command",
id: cmdId,
input: msg,
output: `Failed: ${errorDetails}`,
phase: "finished",
success: false,
});
refreshDerived();
} finally {
setCommandRunning(false);
}
return { submitted: true };
}
// Special handling for /stream command - toggle and save
if (msg.trim() === "/stream") {
const newValue = !tokenStreamingEnabled;
// Immediately add command to transcript with "running" phase and loading message
const cmdId = uid("cmd");
buffersRef.current.byId.set(cmdId, {
kind: "command",
id: cmdId,
input: msg,
output: `${newValue ? "Enabling" : "Disabling"} token streaming...`,
phase: "running",
});
buffersRef.current.order.push(cmdId);
refreshDerived();
// Lock input during async operation
setCommandRunning(true);
try {
setTokenStreamingEnabled(newValue);
// Save to settings
const { settingsManager } = await import("../settings-manager");
settingsManager.updateSettings({ tokenStreaming: newValue });
// Update the same command with final result
buffersRef.current.byId.set(cmdId, {
kind: "command",
id: cmdId,
input: msg,
output: `Token streaming ${newValue ? "enabled" : "disabled"}`,
phase: "finished",
success: true,
});
refreshDerived();
} catch (error) {
// Mark command as failed
const errorDetails = formatErrorDetails(error, agentId);
buffersRef.current.byId.set(cmdId, {
kind: "command",
id: cmdId,
input: msg,
output: `Failed: ${errorDetails}`,
phase: "finished",
success: false,
});
refreshDerived();
} finally {
// Unlock input
setCommandRunning(false);
}
return { submitted: true };
}
// Special handling for /clear command - reset conversation
if (msg.trim() === "/clear") {
const cmdId = uid("cmd");
buffersRef.current.byId.set(cmdId, {
kind: "command",
id: cmdId,
input: msg,
output: "Clearing conversation...",
phase: "running",
});
buffersRef.current.order.push(cmdId);
refreshDerived();
setCommandRunning(true);
try {
const client = await getClient();
await client.agents.messages.reset(agentId, {
add_default_initial_messages: false,
});
// Clear local buffers and static items
// buffersRef.current.byId.clear();
// buffersRef.current.order = [];
// buffersRef.current.tokenCount = 0;
// emittedIdsRef.current.clear();
// setStaticItems([]);
// Update command with success
buffersRef.current.byId.set(cmdId, {
kind: "command",
id: cmdId,
input: msg,
output: "Conversation cleared",
phase: "finished",
success: true,
});
buffersRef.current.order.push(cmdId);
refreshDerived();
} catch (error) {
const errorDetails = formatErrorDetails(error, agentId);
buffersRef.current.byId.set(cmdId, {
kind: "command",
id: cmdId,
input: msg,
output: `Failed: ${errorDetails}`,
phase: "finished",
success: false,
});
refreshDerived();
} finally {
setCommandRunning(false);
}
return { submitted: true };
}
// Special handling for /link command - attach Letta Code tools
if (msg.trim() === "/link") {
const cmdId = uid("cmd");
buffersRef.current.byId.set(cmdId, {
kind: "command",
id: cmdId,
input: msg,
output: "Attaching Letta Code tools to agent...",
phase: "running",
});
buffersRef.current.order.push(cmdId);
refreshDerived();
setCommandRunning(true);
try {
const result = await linkToolsToAgent(agentId);
buffersRef.current.byId.set(cmdId, {
kind: "command",
id: cmdId,
input: msg,
output: result.message,
phase: "finished",
success: result.success,
});
refreshDerived();
} catch (error) {
const errorDetails = formatErrorDetails(error, agentId);
buffersRef.current.byId.set(cmdId, {
kind: "command",
id: cmdId,
input: msg,
output: `Failed: ${errorDetails}`,
phase: "finished",
success: false,
});
refreshDerived();
} finally {
setCommandRunning(false);
}
return { submitted: true };
}
// Special handling for /unlink command - remove Letta Code tools
if (msg.trim() === "/unlink") {
const cmdId = uid("cmd");
buffersRef.current.byId.set(cmdId, {
kind: "command",
id: cmdId,
input: msg,
output: "Removing Letta Code tools from agent...",
phase: "running",
});
buffersRef.current.order.push(cmdId);
refreshDerived();
setCommandRunning(true);
try {
const result = await unlinkToolsFromAgent(agentId);
buffersRef.current.byId.set(cmdId, {
kind: "command",
id: cmdId,
input: msg,
output: result.message,
phase: "finished",
success: result.success,
});
refreshDerived();
} catch (error) {
const errorDetails = formatErrorDetails(error, agentId);
buffersRef.current.byId.set(cmdId, {
kind: "command",
id: cmdId,
input: msg,
output: `Failed: ${errorDetails}`,
phase: "finished",
success: false,
});
refreshDerived();
} finally {
setCommandRunning(false);
}
return { submitted: true };
}
// Special handling for /rename command - rename the agent
if (msg.trim().startsWith("/rename")) {
const parts = msg.trim().split(/\s+/);
const newName = parts.slice(1).join(" ");
if (!newName) {
const cmdId = uid("cmd");
buffersRef.current.byId.set(cmdId, {
kind: "command",
id: cmdId,
input: msg,
output: "Please provide a new name: /rename ",
phase: "finished",
success: false,
});
buffersRef.current.order.push(cmdId);
refreshDerived();
return { submitted: true };
}
const cmdId = uid("cmd");
buffersRef.current.byId.set(cmdId, {
kind: "command",
id: cmdId,
input: msg,
output: `Renaming agent to "${newName}"...`,
phase: "running",
});
buffersRef.current.order.push(cmdId);
refreshDerived();
setCommandRunning(true);
try {
const client = await getClient();
await client.agents.update(agentId, { name: newName });
setAgentName(newName);
buffersRef.current.byId.set(cmdId, {
kind: "command",
id: cmdId,
input: msg,
output: `Agent renamed to "${newName}"`,
phase: "finished",
success: true,
});
refreshDerived();
} catch (error) {
const errorDetails = formatErrorDetails(error, agentId);
buffersRef.current.byId.set(cmdId, {
kind: "command",
id: cmdId,
input: msg,
output: `Failed: ${errorDetails}`,
phase: "finished",
success: false,
});
refreshDerived();
} finally {
setCommandRunning(false);
}
return { submitted: true };
}
// Special handling for /description command - update agent description
if (msg.trim().startsWith("/description")) {
const parts = msg.trim().split(/\s+/);
const newDescription = parts.slice(1).join(" ");
if (!newDescription) {
const cmdId = uid("cmd");
buffersRef.current.byId.set(cmdId, {
kind: "command",
id: cmdId,
input: msg,
output: "Please provide a description: /description ",
phase: "finished",
success: false,
});
buffersRef.current.order.push(cmdId);
refreshDerived();
return { submitted: true };
}
const cmdId = uid("cmd");
buffersRef.current.byId.set(cmdId, {
kind: "command",
id: cmdId,
input: msg,
output: "Updating description...",
phase: "running",
});
buffersRef.current.order.push(cmdId);
refreshDerived();
setCommandRunning(true);
try {
const client = await getClient();
await client.agents.update(agentId, {
description: newDescription,
});
buffersRef.current.byId.set(cmdId, {
kind: "command",
id: cmdId,
input: msg,
output: `Description updated to "${newDescription}"`,
phase: "finished",
success: true,
});
refreshDerived();
} catch (error) {
const errorDetails = formatErrorDetails(error, agentId);
buffersRef.current.byId.set(cmdId, {
kind: "command",
id: cmdId,
input: msg,
output: `Failed: ${errorDetails}`,
phase: "finished",
success: false,
});
refreshDerived();
} finally {
setCommandRunning(false);
}
return { submitted: true };
}
// Special handling for /resume command - show session resume selector
if (msg.trim() === "/resume") {
setResumeSelectorOpen(true);
return { submitted: true };
}
// Special handling for /swap command - alias for /resume
if (msg.trim().startsWith("/swap")) {
const parts = msg.trim().split(/\s+/);
const targetAgentId = parts.slice(1).join(" ");
// If no agent ID provided, open resume selector (same as /resume)
if (!targetAgentId) {
setResumeSelectorOpen(true);
return { submitted: true };
}
// Validate and swap to specified agent ID
const cmdId = uid("cmd");
buffersRef.current.byId.set(cmdId, {
kind: "command",
id: cmdId,
input: msg,
output: `Switching to agent ${targetAgentId}...`,
phase: "running",
});
buffersRef.current.order.push(cmdId);
refreshDerived();
setCommandRunning(true);
try {
const client = await getClient();
// Fetch new agent
const agent = await client.agents.retrieve(targetAgentId);
// Fetch agent's message history
const messagesPage =
await client.agents.messages.list(targetAgentId);
const messages = messagesPage.items;
// Update project settings with new agent
await updateProjectSettings({ lastAgent: targetAgentId });
// Clear current transcript
buffersRef.current.byId.clear();
buffersRef.current.order = [];
buffersRef.current.tokenCount = 0;
emittedIdsRef.current.clear();
setStaticItems([]);
// Update agent state
setAgentId(targetAgentId);
setAgentState(agent);
setAgentName(agent.name);
setLlmConfig(agent.llm_config);
// Add welcome screen for new agent
welcomeCommittedRef.current = false;
setStaticItems([
{
kind: "welcome",
id: `welcome-${Date.now().toString(36)}`,
snapshot: {
continueSession: true,
agentState: agent,
terminalWidth: columns,
},
},
]);
// Backfill message history
if (messages.length > 0) {
hasBackfilledRef.current = false;
backfillBuffers(buffersRef.current, messages);
refreshDerived();
commitEligibleLines(buffersRef.current);
hasBackfilledRef.current = true;
}
// Add success command to transcript
const successCmdId = uid("cmd");
buffersRef.current.byId.set(successCmdId, {
kind: "command",
id: successCmdId,
input: msg,
output: `✓ Switched to agent "${agent.name || targetAgentId}"`,
phase: "finished",
success: true,
});
buffersRef.current.order.push(successCmdId);
refreshDerived();
} catch (error) {
const errorDetails = formatErrorDetails(error, agentId);
buffersRef.current.byId.set(cmdId, {
kind: "command",
id: cmdId,
input: msg,
output: `Failed: ${errorDetails}`,
phase: "finished",
success: false,
});
refreshDerived();
} finally {
setCommandRunning(false);
}
return { submitted: true };
}
// Special handling for /bashes command - show background shell processes
if (msg.trim() === "/bashes") {
const { backgroundProcesses } = await import(
"../tools/impl/process_manager"
);
const cmdId = uid("cmd");
let output: string;
if (backgroundProcesses.size === 0) {
output = "No background processes running";
} else {
const lines = ["Background processes:"];
for (const [id, proc] of backgroundProcesses) {
const status =
proc.status === "running"
? "running"
: proc.status === "completed"
? `completed (exit ${proc.exitCode})`
: `failed (exit ${proc.exitCode})`;
lines.push(` ${id}: ${proc.command} [${status}]`);
}
output = lines.join("\n");
}
buffersRef.current.byId.set(cmdId, {
kind: "command",
id: cmdId,
input: msg,
output,
phase: "finished",
success: true,
});
buffersRef.current.order.push(cmdId);
refreshDerived();
return { submitted: true };
}
// Special handling for /download command - download agent file
if (msg.trim() === "/download") {
const cmdId = uid("cmd");
buffersRef.current.byId.set(cmdId, {
kind: "command",
id: cmdId,
input: msg,
output: "Downloading agent file...",
phase: "running",
});
buffersRef.current.order.push(cmdId);
refreshDerived();
setCommandRunning(true);
try {
const client = await getClient();
const fileContent = await client.agents.exportFile(agentId);
const fileName = `${agentId}.af`;
await Bun.write(fileName, JSON.stringify(fileContent, null, 2));
buffersRef.current.byId.set(cmdId, {
kind: "command",
id: cmdId,
input: msg,
output: `AgentFile downloaded to ${fileName}`,
phase: "finished",
success: true,
});
refreshDerived();
} catch (error) {
const errorDetails = formatErrorDetails(error, agentId);
buffersRef.current.byId.set(cmdId, {
kind: "command",
id: cmdId,
input: msg,
output: `Failed: ${errorDetails}`,
phase: "finished",
success: false,
});
refreshDerived();
} finally {
setCommandRunning(false);
}
return { submitted: true };
}
// Special handling for /skill command - enter skill creation mode
if (trimmed.startsWith("/skill")) {
const cmdId = uid("cmd");
// Extract optional description after `/skill`
const [, ...rest] = trimmed.split(/\s+/);
const description = rest.join(" ").trim();
const initialOutput = description
? `Starting skill creation for: ${description}`
: "Starting skill creation. I’ll load the skill-creator skill and ask a few questions about the skill you want to build...";
buffersRef.current.byId.set(cmdId, {
kind: "command",
id: cmdId,
input: msg,
output: initialOutput,
phase: "running",
});
buffersRef.current.order.push(cmdId);
refreshDerived();
setCommandRunning(true);
try {
// Import the skill-creation prompt
const { SKILL_CREATOR_PROMPT } = await import(
"../agent/promptAssets.js"
);
// Build system-reminder content for skill creation
const userDescriptionLine = description
? `\n\nUser-provided skill description:\n${description}`
: "\n\nThe user did not provide a description with /skill. Ask what kind of skill they want to create before proceeding.";
const skillMessage = `\n${SKILL_CREATOR_PROMPT}${userDescriptionLine}\n`;
// Mark command as finished before sending message
buffersRef.current.byId.set(cmdId, {
kind: "command",
id: cmdId,
input: msg,
output:
"Entered skill creation mode. Answer the assistant’s questions to design your new skill.",
phase: "finished",
success: true,
});
refreshDerived();
// Process conversation with the skill-creation prompt
await processConversation([
{
type: "message",
role: "user",
content: skillMessage,
},
]);
} catch (error) {
const errorDetails = formatErrorDetails(error, agentId);
buffersRef.current.byId.set(cmdId, {
kind: "command",
id: cmdId,
input: msg,
output: `Failed: ${errorDetails}`,
phase: "finished",
success: false,
});
refreshDerived();
} finally {
setCommandRunning(false);
}
return { submitted: true };
}
// Special handling for /remember command - remember something from conversation
if (trimmed.startsWith("/remember")) {
const cmdId = uid("cmd");
// Extract optional description after `/remember`
const [, ...rest] = trimmed.split(/\s+/);
const userText = rest.join(" ").trim();
const initialOutput = userText
? `Remembering: ${userText}`
: "Processing memory request...";
buffersRef.current.byId.set(cmdId, {
kind: "command",
id: cmdId,
input: msg,
output: initialOutput,
phase: "running",
});
buffersRef.current.order.push(cmdId);
refreshDerived();
setCommandRunning(true);
try {
// Import the remember prompt
const { REMEMBER_PROMPT } = await import(
"../agent/promptAssets.js"
);
// Build system-reminder content for memory request
const rememberMessage = userText
? `\n${REMEMBER_PROMPT}\n${userText}`
: `\n${REMEMBER_PROMPT}\n\nThe user did not specify what to remember. Look at the recent conversation context to identify what they likely want you to remember, or ask them to clarify.\n`;
// Mark command as finished before sending message
buffersRef.current.byId.set(cmdId, {
kind: "command",
id: cmdId,
input: msg,
output: userText
? `Remembering: ${userText}`
: "Processing memory request from conversation context...",
phase: "finished",
success: true,
});
refreshDerived();
// Process conversation with the remember prompt
await processConversation([
{
type: "message",
role: "user",
content: rememberMessage,
},
]);
} catch (error) {
const errorDetails = formatErrorDetails(error, agentId);
buffersRef.current.byId.set(cmdId, {
kind: "command",
id: cmdId,
input: msg,
output: `Failed: ${errorDetails}`,
phase: "finished",
success: false,
});
refreshDerived();
} finally {
setCommandRunning(false);
}
return { submitted: true };
}
// Special handling for /init command - initialize agent memory
if (trimmed === "/init") {
const cmdId = uid("cmd");
buffersRef.current.byId.set(cmdId, {
kind: "command",
id: cmdId,
input: msg,
output: "Gathering project context...",
phase: "running",
});
buffersRef.current.order.push(cmdId);
refreshDerived();
setCommandRunning(true);
try {
// Import the initialization prompt
const { INITIALIZE_PROMPT } = await import(
"../agent/promptAssets.js"
);
// Gather git context if available
let gitContext = "";
try {
const { execSync } = await import("node:child_process");
const cwd = process.cwd();
// Check if we're in a git repo
try {
execSync("git rev-parse --git-dir", {
cwd,
stdio: "pipe",
});
// Gather git info
const branch = execSync("git branch --show-current", {
cwd,
encoding: "utf-8",
}).trim();
const mainBranch = execSync(
"git symbolic-ref refs/remotes/origin/HEAD 2>/dev/null | sed 's@^refs/remotes/origin/@@' || echo 'main'",
{ cwd, encoding: "utf-8", shell: "/bin/bash" },
).trim();
const status = execSync("git status --short", {
cwd,
encoding: "utf-8",
}).trim();
const recentCommits = execSync(
"git log --oneline -10 2>/dev/null || echo 'No commits yet'",
{ cwd, encoding: "utf-8" },
).trim();
gitContext = `
## Current Project Context
**Working directory**: ${cwd}
### Git Status
- **Current branch**: ${branch}
- **Main branch**: ${mainBranch}
- **Status**:
${status || "(clean working tree)"}
### Recent Commits
${recentCommits}
`;
} catch {
// Not a git repo, just include working directory
gitContext = `
## Current Project Context
**Working directory**: ${cwd}
**Git**: Not a git repository
`;
}
} catch {
// execSync import failed, skip git context
}
// Mark command as finished before sending message
buffersRef.current.byId.set(cmdId, {
kind: "command",
id: cmdId,
input: msg,
output:
"Assimilating project context and defragmenting memories...",
phase: "finished",
success: true,
});
refreshDerived();
// Send initialization prompt with git context as a system reminder
const initMessage = `\n${INITIALIZE_PROMPT}\n${gitContext}\n`;
// Process conversation with the init prompt
await processConversation([
{
type: "message",
role: "user",
content: initMessage,
},
]);
} catch (error) {
const errorDetails = formatErrorDetails(error, agentId);
buffersRef.current.byId.set(cmdId, {
kind: "command",
id: cmdId,
input: msg,
output: `Failed: ${errorDetails}`,
phase: "finished",
success: false,
});
refreshDerived();
} finally {
setCommandRunning(false);
}
return { submitted: true };
}
// Immediately add command to transcript with "running" phase
const cmdId = uid("cmd");
buffersRef.current.byId.set(cmdId, {
kind: "command",
id: cmdId,
input: msg,
output: "",
phase: "running",
});
buffersRef.current.order.push(cmdId);
refreshDerived();
// Lock input during async operation
setCommandRunning(true);
try {
const { executeCommand } = await import("./commands/registry");
const result = await executeCommand(msg);
// Update the same command with result
buffersRef.current.byId.set(cmdId, {
kind: "command",
id: cmdId,
input: msg,
output: result.output,
phase: "finished",
success: result.success,
});
refreshDerived();
} catch (error) {
// Mark command as failed if executeCommand throws
const errorDetails = formatErrorDetails(error, agentId);
buffersRef.current.byId.set(cmdId, {
kind: "command",
id: cmdId,
input: msg,
output: `Failed: ${errorDetails}`,
phase: "finished",
success: false,
});
refreshDerived();
} finally {
// Unlock input
setCommandRunning(false);
}
return { submitted: true }; // Don't send commands to Letta agent
}
// Build message content from display value (handles placeholders for text/images)
const contentParts = buildMessageContentFromDisplay(msg);
// Prepend plan mode reminder if in plan mode
const planModeReminder = getPlanModeReminder();
// Prepend skill unload reminder if skills are loaded (using cached flag)
const skillUnloadReminder = getSkillUnloadReminder();
// Combine reminders with content (plan mode first, then skill unload)
const allReminders = planModeReminder + skillUnloadReminder;
const messageContent =
allReminders && typeof contentParts === "string"
? allReminders + contentParts
: Array.isArray(contentParts) && allReminders
? [{ type: "text" as const, text: allReminders }, ...contentParts]
: contentParts;
// Append the user message to transcript IMMEDIATELY (optimistic update)
const userId = uid("user");
buffersRef.current.byId.set(userId, {
kind: "user",
id: userId,
text: msg,
});
buffersRef.current.order.push(userId);
// Reset token counter for this turn (only count the agent's response)
buffersRef.current.tokenCount = 0;
// Rotate to a new thinking message for this turn
setThinkingMessage(getRandomThinkingMessage());
// Show streaming state immediately for responsiveness
setStreaming(true);
refreshDerived();
// Check for pending approvals before sending message (skip if we already have
// a queued approval response to send first).
if (CHECK_PENDING_APPROVALS_BEFORE_SEND && !queuedApprovalResults) {
try {
const client = await getClient();
// Fetch fresh agent state to check for pending approvals with accurate in-context messages
const agent = await client.agents.retrieve(agentId);
const { pendingApprovals: existingApprovals } = await getResumeData(
client,
agent,
);
// Check if user cancelled while we were fetching approval state
if (
userCancelledRef.current ||
abortControllerRef.current?.signal.aborted
) {
// User hit ESC during the check - abort and clean up
buffersRef.current.byId.delete(userId);
const orderIndex = buffersRef.current.order.indexOf(userId);
if (orderIndex !== -1) {
buffersRef.current.order.splice(orderIndex, 1);
}
setStreaming(false);
refreshDerived();
return { submitted: false };
}
if (existingApprovals && existingApprovals.length > 0) {
// There are pending approvals - show them and DON'T send the message yet
// The message will be restored to the input field for the user to decide
// Remove the optimistic user message from transcript to avoid duplication
buffersRef.current.byId.delete(userId);
const orderIndex = buffersRef.current.order.indexOf(userId);
if (orderIndex !== -1) {
buffersRef.current.order.splice(orderIndex, 1);
}
setStreaming(false); // Stop streaming indicator
setPendingApprovals(existingApprovals);
// Analyze approval contexts for ALL pending approvals
const contexts = await Promise.all(
existingApprovals.map(async (approval) => {
const parsedArgs = safeJsonParseOr>(
approval.toolArgs,
{},
);
return await analyzeToolApproval(approval.toolName, parsedArgs);
}),
);
// Check again after async approval analysis
if (
userCancelledRef.current ||
abortControllerRef.current?.signal.aborted
) {
// User cancelled during analysis - don't show dialog
setStreaming(false);
refreshDerived();
return { submitted: false };
}
setApprovalContexts(contexts);
// Refresh to remove the message from UI
refreshDerived();
// Return false = message NOT submitted, will be restored to input
return { submitted: false };
}
} catch (_error) {
// If check fails, proceed anyway (don't block user)
}
}
// Start the conversation loop. If we have queued approval results from an interrupted
// client-side execution, send them first before the new user message.
const initialInput: Array = [];
if (queuedApprovalResults) {
initialInput.push({
type: "approval",
approvals: queuedApprovalResults,
});
setQueuedApprovalResults(null);
}
initialInput.push({
type: "message",
role: "user",
content: messageContent as unknown as MessageCreate["content"],
});
await processConversation(initialInput);
// Clean up placeholders after submission
clearPlaceholdersInText(msg);
return { submitted: true };
},
[
streaming,
commandRunning,
processConversation,
tokenStreamingEnabled,
refreshDerived,
agentId,
handleExit,
columns,
commitEligibleLines,
isExecutingTool,
queuedApprovalResults,
pendingApprovals,
],
);
const onSubmitRef = useRef(onSubmit);
useEffect(() => {
onSubmitRef.current = onSubmit;
}, [onSubmit]);
// Process queued messages when streaming ends
useEffect(() => {
if (
!streaming &&
messageQueue.length > 0 &&
pendingApprovals.length === 0 &&
!commandRunning &&
!isExecutingTool &&
!waitingForQueueCancelRef.current && // Don't dequeue while waiting for cancel
!userCancelledRef.current // Don't dequeue if user just cancelled
) {
const [firstMessage, ...rest] = messageQueue;
setMessageQueue(rest);
// Submit the first message using the normal submit flow
// This ensures all setup (reminders, UI updates, etc.) happens correctly
onSubmitRef.current(firstMessage);
}
}, [
streaming,
messageQueue,
pendingApprovals,
commandRunning,
isExecutingTool,
]);
// Helper to send all approval results when done
const sendAllResults = useCallback(
async (
additionalDecision?:
| { type: "approve"; approval: ApprovalRequest }
| { type: "deny"; approval: ApprovalRequest; reason: string },
) => {
try {
// Don't send results if user has already cancelled
if (
userCancelledRef.current ||
abortControllerRef.current?.signal.aborted
) {
setStreaming(false);
setIsExecutingTool(false);
setPendingApprovals([]);
setApprovalContexts([]);
setApprovalResults([]);
setAutoHandledResults([]);
setAutoDeniedApprovals([]);
return;
}
// Snapshot current state before clearing dialog
const approvalResultsSnapshot = [...approvalResults];
const autoHandledSnapshot = [...autoHandledResults];
const autoDeniedSnapshot = [...autoDeniedApprovals];
const pendingSnapshot = [...pendingApprovals];
// Clear dialog state immediately so UI updates right away
setPendingApprovals([]);
setApprovalContexts([]);
setApprovalResults([]);
setAutoHandledResults([]);
setAutoDeniedApprovals([]);
// Show "thinking" state and lock input while executing approved tools client-side
setStreaming(true);
const approvalAbortController = new AbortController();
toolAbortControllerRef.current = approvalAbortController;
// Combine all decisions using snapshots
const allDecisions = [
...approvalResultsSnapshot,
...(additionalDecision ? [additionalDecision] : []),
];
// Execute approved tools and format results using shared function
const { executeApprovalBatch } = await import(
"../agent/approval-execution"
);
const executedResults = await executeApprovalBatch(
allDecisions,
(chunk) => {
onChunk(buffersRef.current, chunk);
// Also log errors to the UI error display
if (
chunk.status === "error" &&
chunk.message_type === "tool_return_message"
) {
const isToolError = chunk.tool_return?.startsWith(
"Error executing tool:",
);
if (isToolError) {
appendError(chunk.tool_return);
}
}
// Flush UI so completed tools show up while the batch continues
refreshDerived();
},
{ abortSignal: approvalAbortController.signal },
);
// Combine with auto-handled and auto-denied results using snapshots
const allResults = [
...autoHandledSnapshot.map((ar) => ({
type: "tool" as const,
tool_call_id: ar.toolCallId,
tool_return: ar.result.toolReturn,
status: ar.result.status,
stdout: ar.result.stdout,
stderr: ar.result.stderr,
})),
...autoDeniedSnapshot.map((ad) => ({
type: "approval" as const,
tool_call_id: ad.approval.toolCallId,
approve: false,
reason: ad.reason,
})),
...executedResults,
];
// Dev-only validation: ensure outgoing IDs match expected IDs (using snapshots)
if (process.env.NODE_ENV !== "production") {
// Include ALL tool call IDs: auto-handled, auto-denied, and pending approvals
const expectedIds = new Set([
...autoHandledSnapshot.map((ar) => ar.toolCallId),
...autoDeniedSnapshot.map((ad) => ad.approval.toolCallId),
...pendingSnapshot.map((a) => a.toolCallId),
]);
const sendingIds = new Set(
allResults.map((r) => r.tool_call_id).filter(Boolean),
);
const setsEqual = (a: Set, b: Set) =>
a.size === b.size && [...a].every((id) => b.has(id));
if (!setsEqual(expectedIds, sendingIds)) {
console.error("[BUG] Approval ID mismatch detected");
console.error("Expected IDs:", Array.from(expectedIds));
console.error("Sending IDs:", Array.from(sendingIds));
throw new Error(
"Approval ID mismatch - refusing to send mismatched IDs",
);
}
}
// Rotate to a new thinking message
setThinkingMessage(getRandomThinkingMessage());
refreshDerived();
const wasAborted = approvalAbortController.signal.aborted;
const userCancelled =
userCancelledRef.current ||
abortControllerRef.current?.signal.aborted;
if (wasAborted || userCancelled) {
// Queue results to send alongside the next user message (if not cancelled entirely)
if (!userCancelled) {
setQueuedApprovalResults(allResults as ApprovalResult[]);
}
setStreaming(false);
} else {
// Continue conversation with all results
await processConversation([
{
type: "approval",
approvals: allResults as ApprovalResult[],
},
]);
}
} finally {
// Always release the execution guard, even if an error occurred
setIsExecutingTool(false);
toolAbortControllerRef.current = null;
}
},
[
approvalResults,
autoHandledResults,
autoDeniedApprovals,
pendingApprovals,
processConversation,
refreshDerived,
appendError,
],
);
// Handle approval callbacks - sequential review
const handleApproveCurrent = useCallback(async () => {
if (isExecutingTool) return;
const currentIndex = approvalResults.length;
const currentApproval = pendingApprovals[currentIndex];
if (!currentApproval) return;
setIsExecutingTool(true);
try {
// Store approval decision (don't execute yet - batch execute after all approvals)
const decision = {
type: "approve" as const,
approval: currentApproval,
};
// Check if we're done with all approvals
if (currentIndex + 1 >= pendingApprovals.length) {
// All approvals collected, execute and send to backend
// sendAllResults owns the lock release via its finally block
await sendAllResults(decision);
} else {
// Not done yet, store decision and show next approval
setApprovalResults((prev) => [...prev, decision]);
setIsExecutingTool(false);
}
} catch (e) {
const errorDetails = formatErrorDetails(e, agentId);
appendError(errorDetails);
setStreaming(false);
setIsExecutingTool(false);
}
}, [
agentId,
pendingApprovals,
approvalResults,
sendAllResults,
appendError,
isExecutingTool,
]);
const handleApproveAlways = useCallback(
async (scope?: "project" | "session") => {
if (isExecutingTool) return;
// For now, just handle the first approval with approve-always
// TODO: Support approve-always for multiple approvals
if (pendingApprovals.length === 0 || approvalContexts.length === 0)
return;
const currentIndex = approvalResults.length;
const approvalContext = approvalContexts[currentIndex];
if (!approvalContext) return;
const rule = approvalContext.recommendedRule;
const actualScope = scope || approvalContext.defaultScope;
// Save the permission rule
await savePermissionRule(rule, "allow", actualScope);
// Show confirmation in transcript
const scopeText =
actualScope === "session" ? " (session only)" : " (project)";
const cmdId = uid("cmd");
buffersRef.current.byId.set(cmdId, {
kind: "command",
id: cmdId,
input: "/approve-always",
output: `Added permission: ${rule}${scopeText}`,
});
buffersRef.current.order.push(cmdId);
refreshDerived();
// Approve current tool (handleApproveCurrent manages the execution guard)
await handleApproveCurrent();
},
[
approvalResults,
approvalContexts,
pendingApprovals,
handleApproveCurrent,
refreshDerived,
isExecutingTool,
],
);
const handleDenyCurrent = useCallback(
async (reason: string) => {
if (isExecutingTool) return;
const currentIndex = approvalResults.length;
const currentApproval = pendingApprovals[currentIndex];
if (!currentApproval) return;
setIsExecutingTool(true);
try {
// Store denial decision
const decision = {
type: "deny" as const,
approval: currentApproval,
reason: reason || "User denied the tool execution",
};
// Check if we're done with all approvals
if (currentIndex + 1 >= pendingApprovals.length) {
// All approvals collected, execute and send to backend
// sendAllResults owns the lock release via its finally block
setThinkingMessage(getRandomThinkingMessage());
await sendAllResults(decision);
} else {
// Not done yet, store decision and show next approval
setApprovalResults((prev) => [...prev, decision]);
setIsExecutingTool(false);
}
} catch (e) {
const errorDetails = formatErrorDetails(e, agentId);
appendError(errorDetails);
setStreaming(false);
setIsExecutingTool(false);
}
},
[
agentId,
pendingApprovals,
approvalResults,
sendAllResults,
appendError,
isExecutingTool,
],
);
const handleModelSelect = useCallback(
async (modelId: string) => {
setModelSelectorOpen(false);
// Declare cmdId outside try block so it's accessible in catch
let cmdId: string | null = null;
try {
// Find the selected model from models.json first (for loading message)
const { models } = await import("../agent/model");
const selectedModel = models.find((m) => m.id === modelId);
if (!selectedModel) {
// Create a failed command in the transcript
cmdId = uid("cmd");
buffersRef.current.byId.set(cmdId, {
kind: "command",
id: cmdId,
input: `/model ${modelId}`,
output: `Model not found: ${modelId}`,
phase: "finished",
success: false,
});
buffersRef.current.order.push(cmdId);
refreshDerived();
return;
}
// Immediately add command to transcript with "running" phase and loading message
cmdId = uid("cmd");
buffersRef.current.byId.set(cmdId, {
kind: "command",
id: cmdId,
input: `/model ${modelId}`,
output: `Switching model to ${selectedModel.label}...`,
phase: "running",
});
buffersRef.current.order.push(cmdId);
refreshDerived();
// Lock input during async operation
setCommandRunning(true);
// Update the agent with new model and config args
const { updateAgentLLMConfig } = await import("../agent/modify");
const updatedConfig = await updateAgentLLMConfig(
agentId,
selectedModel.handle,
selectedModel.updateArgs,
);
setLlmConfig(updatedConfig);
// After switching models, only switch toolset if it actually changes
const { isOpenAIModel, isGeminiModel } = await import(
"../tools/manager"
);
const targetToolset:
| "codex"
| "codex_snake"
| "default"
| "gemini"
| "gemini_snake" = isOpenAIModel(selectedModel.handle ?? "")
? "codex"
: isGeminiModel(selectedModel.handle ?? "")
? "gemini"
: "default";
let toolsetName:
| "codex"
| "codex_snake"
| "default"
| "gemini"
| "gemini_snake"
| null = null;
if (currentToolset !== targetToolset) {
const { switchToolsetForModel } = await import("../tools/toolset");
toolsetName = await switchToolsetForModel(
selectedModel.handle ?? "",
agentId,
);
setCurrentToolset(toolsetName);
}
// Update the same command with final result (include toolset info only if changed)
const autoToolsetLine = toolsetName
? `Automatically switched toolset to ${toolsetName}. Use /toolset to change back if desired.\nConsider switching to a different system prompt using /system to match.`
: null;
const outputLines = [
`Switched to ${selectedModel.label}`,
...(autoToolsetLine ? [autoToolsetLine] : []),
].join("\n");
buffersRef.current.byId.set(cmdId, {
kind: "command",
id: cmdId,
input: `/model ${modelId}`,
output: outputLines,
phase: "finished",
success: true,
});
refreshDerived();
} catch (error) {
// Mark command as failed (only if cmdId was created)
const errorDetails = formatErrorDetails(error, agentId);
if (cmdId) {
buffersRef.current.byId.set(cmdId, {
kind: "command",
id: cmdId,
input: `/model ${modelId}`,
output: `Failed to switch model: ${errorDetails}`,
phase: "finished",
success: false,
});
refreshDerived();
}
} finally {
// Unlock input
setCommandRunning(false);
}
},
[agentId, refreshDerived, currentToolset],
);
const handleSystemPromptSelect = useCallback(
async (promptId: string) => {
setSystemPromptSelectorOpen(false);
const cmdId = uid("cmd");
try {
// Find the selected prompt
const { SYSTEM_PROMPTS } = await import("../agent/promptAssets");
const selectedPrompt = SYSTEM_PROMPTS.find((p) => p.id === promptId);
if (!selectedPrompt) {
buffersRef.current.byId.set(cmdId, {
kind: "command",
id: cmdId,
input: `/system ${promptId}`,
output: `System prompt not found: ${promptId}`,
phase: "finished",
success: false,
});
buffersRef.current.order.push(cmdId);
refreshDerived();
return;
}
// Immediately add command to transcript with "running" phase
buffersRef.current.byId.set(cmdId, {
kind: "command",
id: cmdId,
input: `/system ${promptId}`,
output: `Switching system prompt to ${selectedPrompt.label}...`,
phase: "running",
});
buffersRef.current.order.push(cmdId);
refreshDerived();
// Lock input during async operation
setCommandRunning(true);
// Update the agent's system prompt
const { updateAgentSystemPrompt } = await import("../agent/modify");
const result = await updateAgentSystemPrompt(
agentId,
selectedPrompt.content,
);
if (result.success) {
setCurrentSystemPromptId(promptId);
buffersRef.current.byId.set(cmdId, {
kind: "command",
id: cmdId,
input: `/system ${promptId}`,
output: `Switched system prompt to ${selectedPrompt.label}`,
phase: "finished",
success: true,
});
} else {
buffersRef.current.byId.set(cmdId, {
kind: "command",
id: cmdId,
input: `/system ${promptId}`,
output: result.message,
phase: "finished",
success: false,
});
}
refreshDerived();
} catch (error) {
const errorDetails = formatErrorDetails(error, agentId);
buffersRef.current.byId.set(cmdId, {
kind: "command",
id: cmdId,
input: `/system ${promptId}`,
output: `Failed to switch system prompt: ${errorDetails}`,
phase: "finished",
success: false,
});
refreshDerived();
} finally {
setCommandRunning(false);
}
},
[agentId, refreshDerived],
);
const handleToolsetSelect = useCallback(
async (
toolsetId:
| "codex"
| "codex_snake"
| "default"
| "gemini"
| "gemini_snake",
) => {
setToolsetSelectorOpen(false);
const cmdId = uid("cmd");
try {
// Immediately add command to transcript with "running" phase
buffersRef.current.byId.set(cmdId, {
kind: "command",
id: cmdId,
input: `/toolset ${toolsetId}`,
output: `Switching toolset to ${toolsetId}...`,
phase: "running",
});
buffersRef.current.order.push(cmdId);
refreshDerived();
// Lock input during async operation
setCommandRunning(true);
// Force switch to the selected toolset
const { forceToolsetSwitch } = await import("../tools/toolset");
await forceToolsetSwitch(toolsetId, agentId);
setCurrentToolset(toolsetId);
// Update the command with final result
buffersRef.current.byId.set(cmdId, {
kind: "command",
id: cmdId,
input: `/toolset ${toolsetId}`,
output: `Switched toolset to ${toolsetId}`,
phase: "finished",
success: true,
});
refreshDerived();
} catch (error) {
const errorDetails = formatErrorDetails(error, agentId);
buffersRef.current.byId.set(cmdId, {
kind: "command",
id: cmdId,
input: `/toolset ${toolsetId}`,
output: `Failed to switch toolset: ${errorDetails}`,
phase: "finished",
success: false,
});
refreshDerived();
} finally {
// Unlock input
setCommandRunning(false);
}
},
[agentId, refreshDerived],
);
const handleAgentSelect = useCallback(
async (targetAgentId: string) => {
setAgentSelectorOpen(false);
const cmdId = uid("cmd");
buffersRef.current.byId.set(cmdId, {
kind: "command",
id: cmdId,
input: `/swap ${targetAgentId}`,
output: `Switching to agent ${targetAgentId}...`,
phase: "running",
});
buffersRef.current.order.push(cmdId);
refreshDerived();
setCommandRunning(true);
try {
const client = await getClient();
// Fetch new agent
const agent = await client.agents.retrieve(targetAgentId);
// Fetch agent's message history
const messagesPage = await client.agents.messages.list(targetAgentId);
const messages = messagesPage.items;
// Update project settings with new agent
await updateProjectSettings({ lastAgent: targetAgentId });
// Clear current transcript
buffersRef.current.byId.clear();
buffersRef.current.order = [];
buffersRef.current.tokenCount = 0;
emittedIdsRef.current.clear();
setStaticItems([]);
// Update agent state
setAgentId(targetAgentId);
setAgentState(agent);
setAgentName(agent.name);
setLlmConfig(agent.llm_config);
// Add welcome screen for new agent
welcomeCommittedRef.current = false;
setStaticItems([
{
kind: "welcome",
id: `welcome-${Date.now().toString(36)}`,
snapshot: {
continueSession: true,
agentState: agent,
terminalWidth: columns,
},
},
]);
// Backfill message history
if (messages.length > 0) {
hasBackfilledRef.current = false;
backfillBuffers(buffersRef.current, messages);
refreshDerived();
commitEligibleLines(buffersRef.current);
hasBackfilledRef.current = true;
}
// Add success command to transcript
const successCmdId = uid("cmd");
buffersRef.current.byId.set(successCmdId, {
kind: "command",
id: successCmdId,
input: `/swap ${targetAgentId}`,
output: `✓ Switched to agent "${agent.name || targetAgentId}"`,
phase: "finished",
success: true,
});
buffersRef.current.order.push(successCmdId);
refreshDerived();
} catch (error) {
const errorDetails = formatErrorDetails(error, agentId);
buffersRef.current.byId.set(cmdId, {
kind: "command",
id: cmdId,
input: `/swap ${targetAgentId}`,
output: `Failed: ${errorDetails}`,
phase: "finished",
success: false,
});
refreshDerived();
} finally {
setCommandRunning(false);
}
},
[refreshDerived, commitEligibleLines, columns, agentId],
);
// Track permission mode changes for UI updates
const [uiPermissionMode, setUiPermissionMode] = useState(
permissionMode.getMode(),
);
const handlePlanApprove = useCallback(
async (acceptEdits: boolean = false) => {
const currentIndex = approvalResults.length;
const approval = pendingApprovals[currentIndex];
if (!approval) return;
const isLast = currentIndex + 1 >= pendingApprovals.length;
// Exit plan mode
const newMode = acceptEdits ? "acceptEdits" : "default";
permissionMode.setMode(newMode);
setUiPermissionMode(newMode);
try {
// Execute ExitPlanMode tool to get the result
const parsedArgs = safeJsonParseOr>(
approval.toolArgs,
{},
);
const toolResult = await executeTool("ExitPlanMode", parsedArgs);
// Update buffers with tool return
onChunk(buffersRef.current, {
message_type: "tool_return_message",
id: "dummy",
date: new Date().toISOString(),
tool_call_id: approval.toolCallId,
tool_return: toolResult.toolReturn,
status: toolResult.status,
stdout: toolResult.stdout,
stderr: toolResult.stderr,
});
setThinkingMessage(getRandomThinkingMessage());
refreshDerived();
const decision = {
type: "approve" as const,
approval,
precomputedResult: toolResult,
};
if (isLast) {
setIsExecutingTool(true);
await sendAllResults(decision);
} else {
setApprovalResults((prev) => [...prev, decision]);
}
} catch (e) {
const errorDetails = formatErrorDetails(e, agentId);
appendError(errorDetails);
setStreaming(false);
}
},
[
agentId,
pendingApprovals,
approvalResults,
sendAllResults,
appendError,
refreshDerived,
],
);
const handlePlanKeepPlanning = useCallback(
async (reason: string) => {
const currentIndex = approvalResults.length;
const approval = pendingApprovals[currentIndex];
if (!approval) return;
const isLast = currentIndex + 1 >= pendingApprovals.length;
// Stay in plan mode
const denialReason =
reason ||
"The user doesn't want to proceed with this tool use. The tool use was rejected (eg. if it was a file edit, the new_string was NOT written to the file). STOP what you are doing and wait for the user to tell you how to proceed.";
const decision = {
type: "deny" as const,
approval,
reason: denialReason,
};
if (isLast) {
setIsExecutingTool(true);
await sendAllResults(decision);
} else {
setApprovalResults((prev) => [...prev, decision]);
}
},
[pendingApprovals, approvalResults, sendAllResults],
);
const handleQuestionSubmit = useCallback(
async (answers: Record) => {
const currentIndex = approvalResults.length;
const approval = pendingApprovals[currentIndex];
if (!approval) return;
const isLast = currentIndex + 1 >= pendingApprovals.length;
// Get questions from approval args
const questions = getQuestionsFromApproval(approval);
// Format the answer string like Claude Code does
const answerParts = questions.map((q) => {
const answer = answers[q.question] || "";
return `"${q.question}"="${answer}"`;
});
const toolReturn = `User has answered your questions: ${answerParts.join(", ")}. You can now continue with the user's answers in mind.`;
const precomputedResult: ToolExecutionResult = {
toolReturn,
status: "success",
};
// Update buffers with tool return
onChunk(buffersRef.current, {
message_type: "tool_return_message",
id: "dummy",
date: new Date().toISOString(),
tool_call_id: approval.toolCallId,
tool_return: toolReturn,
status: "success",
stdout: null,
stderr: null,
});
setThinkingMessage(getRandomThinkingMessage());
refreshDerived();
const decision = {
type: "approve" as const,
approval,
precomputedResult,
};
if (isLast) {
setIsExecutingTool(true);
await sendAllResults(decision);
} else {
setApprovalResults((prev) => [...prev, decision]);
}
},
[pendingApprovals, approvalResults, sendAllResults, refreshDerived],
);
const handleEnterPlanModeApprove = useCallback(async () => {
const currentIndex = approvalResults.length;
const approval = pendingApprovals[currentIndex];
if (!approval) return;
const isLast = currentIndex + 1 >= pendingApprovals.length;
// Generate plan file path
const planFilePath = generatePlanFilePath();
// Toggle plan mode on and store plan file path
permissionMode.setMode("plan");
permissionMode.setPlanFilePath(planFilePath);
setUiPermissionMode("plan");
// Get the tool return message from the implementation
const toolReturn = `Entered plan mode. You should now focus on exploring the codebase and designing an implementation approach.
In plan mode, you should:
1. Thoroughly explore the codebase to understand existing patterns
2. Identify similar features and architectural approaches
3. Consider multiple approaches and their trade-offs
4. Use AskUserQuestion if you need to clarify the approach
5. Design a concrete implementation strategy
6. When ready, use ExitPlanMode to present your plan for approval
Remember: DO NOT write or edit any files yet. This is a read-only exploration and planning phase.
Plan file path: ${planFilePath}`;
const precomputedResult: ToolExecutionResult = {
toolReturn,
status: "success",
};
// Update buffers with tool return
onChunk(buffersRef.current, {
message_type: "tool_return_message",
id: "dummy",
date: new Date().toISOString(),
tool_call_id: approval.toolCallId,
tool_return: toolReturn,
status: "success",
stdout: null,
stderr: null,
});
setThinkingMessage(getRandomThinkingMessage());
refreshDerived();
const decision = {
type: "approve" as const,
approval,
precomputedResult,
};
if (isLast) {
setIsExecutingTool(true);
await sendAllResults(decision);
} else {
setApprovalResults((prev) => [...prev, decision]);
}
}, [pendingApprovals, approvalResults, sendAllResults, refreshDerived]);
const handleEnterPlanModeReject = useCallback(async () => {
const currentIndex = approvalResults.length;
const approval = pendingApprovals[currentIndex];
if (!approval) return;
const isLast = currentIndex + 1 >= pendingApprovals.length;
const rejectionReason =
"User chose to skip plan mode and start implementing directly.";
const decision = {
type: "deny" as const,
approval,
reason: rejectionReason,
};
if (isLast) {
setIsExecutingTool(true);
await sendAllResults(decision);
} else {
setApprovalResults((prev) => [...prev, decision]);
}
}, [pendingApprovals, approvalResults, sendAllResults]);
// Live area shows only in-progress items
const liveItems = useMemo(() => {
return lines.filter((ln) => {
if (!("phase" in ln)) return false;
if (ln.kind === "command") {
return ln.phase === "running";
}
if (ln.kind === "tool_call") {
// Always show tool calls in progress, regardless of tokenStreaming setting
return ln.phase !== "finished";
}
if (!tokenStreamingEnabled && ln.phase === "streaming") return false;
return ln.phase === "streaming";
});
}, [lines, tokenStreamingEnabled]);
// Commit welcome snapshot once when ready for fresh sessions (no history)
// Wait for agentProvenance to be available for new agents (continueSession=false)
useEffect(() => {
if (
loadingState === "ready" &&
!welcomeCommittedRef.current &&
messageHistory.length === 0
) {
// For new agents, wait until provenance is available
// For resumed agents, provenance stays null (that's expected)
if (!continueSession && !agentProvenance) {
return; // Wait for provenance to be set
}
welcomeCommittedRef.current = true;
setStaticItems((prev) => [
...prev,
{
kind: "welcome",
id: `welcome-${Date.now().toString(36)}`,
snapshot: {
continueSession,
agentState,
agentProvenance,
terminalWidth: columns,
},
},
]);
}
}, [
loadingState,
continueSession,
messageHistory.length,
columns,
agentProvenance,
agentState,
]);
return (
{(item: StaticItem, index: number) => (
0 ? 1 : 0}>
{item.kind === "welcome" ? (
) : item.kind === "user" ? (
) : item.kind === "reasoning" ? (
) : item.kind === "assistant" ? (
) : item.kind === "tool_call" ? (
) : item.kind === "error" ? (
) : item.kind === "status" ? (
) : item.kind === "command" ? (
) : null}
)}
{/* Loading screen / intro text */}
{loadingState !== "ready" && (
)}
{loadingState === "ready" && (
<>
{/* Transcript */}
{liveItems.length > 0 && pendingApprovals.length === 0 && (
{liveItems.map((ln) => (
{ln.kind === "user" ? (
) : ln.kind === "reasoning" ? (
) : ln.kind === "assistant" ? (
) : ln.kind === "tool_call" ? (
) : ln.kind === "error" ? (
) : ln.kind === "status" ? (
) : ln.kind === "command" ? (
) : null}
))}
)}
{/* Ensure 1 blank line above input when there are no live items */}
{liveItems.length === 0 && }
{/* Show exit stats when exiting */}
{showExitStats && (
)}
{/* Input row - always mounted to preserve state */}
{/* Model Selector - conditionally mounted as overlay */}
{modelSelectorOpen && (
setModelSelectorOpen(false)}
/>
)}
{/* Toolset Selector - conditionally mounted as overlay */}
{toolsetSelectorOpen && (
setToolsetSelectorOpen(false)}
/>
)}
{/* System Prompt Selector - conditionally mounted as overlay */}
{systemPromptSelectorOpen && (
setSystemPromptSelectorOpen(false)}
/>
)}
{/* Agent Selector - conditionally mounted as overlay */}
{agentSelectorOpen && (
setAgentSelectorOpen(false)}
/>
)}
{/* Resume Selector - conditionally mounted as overlay */}
{resumeSelectorOpen && (
{
setResumeSelectorOpen(false);
handleAgentSelect(id);
}}
onCancel={() => setResumeSelectorOpen(false)}
/>
)}
{/* Plan Mode Dialog - for ExitPlanMode tool */}
{currentApproval?.toolName === "ExitPlanMode" && (
<>
handlePlanApprove(false)}
onApproveAndAcceptEdits={() => handlePlanApprove(true)}
onKeepPlanning={handlePlanKeepPlanning}
/>
)}
{/* Question Dialog - for AskUserQuestion tool */}
{currentApproval?.toolName === "AskUserQuestion" && (
<>
)}
{/* Enter Plan Mode Dialog - for EnterPlanMode tool */}
{currentApproval?.toolName === "EnterPlanMode" && (
<>
)}
{/* Approval Dialog - for standard tools (not fancy UI tools) */}
{currentApproval && !isFancyUITool(currentApproval.toolName) && (
<>
)}
)}
);
}