Add daemon-wide system prompts (#1100)

* Add daemon-wide system prompt setting

* Align settings textarea rendering

* Polish daemon settings layout

* Remove orchestrator prompt injection

packages/server/src/server/agent/agent-manager.test.ts

@@ -100,12 +100,15 @@ function expectArchivedAgentRecord(
 class TestAgentClient implements AgentClient {
   readonly provider = "codex" as const;
   readonly capabilities = TEST_CAPABILITIES;
+  readonly createdConfigs: AgentSessionConfig[] = [];
+  readonly resumeOverrides: Array<Partial<AgentSessionConfig> | undefined> = [];
 
   async isAvailable(): Promise<boolean> {
     return true;
   }
 
   async createSession(config: AgentSessionConfig): Promise<AgentSession> {
+    this.createdConfigs.push(config);
     return new TestAgentSession(config);
   }
 
@@ -135,9 +138,11 @@ class TestAgentClient implements AgentClient {
     config?: Partial<AgentSessionConfig>,
     _launchContext?: AgentLaunchContext,
   ): Promise<AgentSession> {
+    this.resumeOverrides.push(config);
     return new TestAgentSession({
       provider: "codex",
       cwd: config?.cwd ?? process.cwd(),
+      daemonAppendSystemPrompt: config?.daemonAppendSystemPrompt,
     });
   }
 }
@@ -391,6 +396,62 @@ test("normalizeConfig strips legacy 'default' model id", async () => {
   expect(snapshot.config.modeId).toBe("auto");
 });
 
+test("createAgent injects daemon append system prompt at runtime only", async () => {
+  const workdir = mkdtempSync(join(tmpdir(), "agent-manager-test-"));
+  const storagePath = join(workdir, "agents");
+  const storage = new AgentStorage(storagePath, logger);
+  const client = new TestAgentClient();
+  const manager = new AgentManager({
+    clients: {
+      codex: client,
+    },
+    registry: storage,
+    logger,
+    appendSystemPrompt: "  Daemon instructions.  ",
+    idFactory: () => "00000000-0000-4000-8000-000000000103",
+  });
+
+  const snapshot = await manager.createAgent({
+    provider: "codex",
+    cwd: workdir,
+    systemPrompt: "Agent instructions.",
+  });
+  const record = await storage.get(snapshot.id);
+
+  expect(client.createdConfigs[0]?.systemPrompt).toBe("Agent instructions.");
+  expect(client.createdConfigs[0]?.daemonAppendSystemPrompt).toBe("Daemon instructions.");
+  expect(snapshot.config.daemonAppendSystemPrompt).toBe("Daemon instructions.");
+  expect(record?.config?.systemPrompt).toBe("Agent instructions.");
+  expect(record?.config).not.toHaveProperty("daemonAppendSystemPrompt");
+});
+
+test("daemon append system prompt is not injected into Pi", async () => {
+  const workdir = mkdtempSync(join(tmpdir(), "agent-manager-test-"));
+  const storagePath = join(workdir, "agents");
+  const storage = new AgentStorage(storagePath, logger);
+  const client = new TestAgentClient();
+  const manager = new AgentManager({
+    clients: {
+      pi: client as unknown as AgentClient,
+    },
+    providerDefinitions: {
+      pi: { enabled: true },
+    },
+    registry: storage,
+    logger,
+    appendSystemPrompt: "Daemon instructions.",
+    idFactory: () => "00000000-0000-4000-8000-000000000104",
+  });
+
+  await manager.createAgent({
+    provider: "pi",
+    cwd: workdir,
+    systemPrompt: "Agent instructions.",
+  });
+
+  expect(client.createdConfigs[0]?.daemonAppendSystemPrompt).toBeUndefined();
+});
+
 test("setAgentMode persists the selected mode across session reload", async () => {
   const workdir = mkdtempSync(join(tmpdir(), "agent-manager-test-"));
   const storagePath = join(workdir, "agents");

packages/server/src/server/agent/agent-manager.ts

@@ -173,6 +173,7 @@ export interface AgentManagerOptions {
   durableTimelineStore?: AgentTimelineStore;
   terminalManager?: TerminalManager | null;
   mcpBaseUrl?: string;
+  appendSystemPrompt?: string;
   agentStreamCoalesceWindowMs?: number;
   rescueTimeouts?: AgentManagerRescueTimeouts;
   logger: Logger;
@@ -438,6 +439,7 @@ export class AgentManager {
   private readonly backgroundTasks = new Set<Promise<void>>();
   private readonly agentStreamCoalescer: AgentStreamCoalescer;
   private mcpBaseUrl: string | null;
+  private appendSystemPrompt: string;
   private onAgentAttention?: AgentAttentionCallback;
   private logger: Logger;
   private readonly rescueTimeouts: Required<AgentManagerRescueTimeouts>;
@@ -448,6 +450,7 @@ export class AgentManager {
     this.durableTimelineStore = options?.durableTimelineStore;
     this.onAgentAttention = options?.onAgentAttention;
     this.mcpBaseUrl = options?.mcpBaseUrl ?? null;
+    this.appendSystemPrompt = options.appendSystemPrompt ?? "";
     this.logger = options.logger.child({ module: "agent", component: "agent-manager" });
     this.rescueTimeouts = {
       reloadSessionCloseMs:
@@ -502,6 +505,10 @@ export class AgentManager {
     this.mcpBaseUrl = url;
   }
 
+  setAppendSystemPrompt(prompt: string | null | undefined): void {
+    this.appendSystemPrompt = prompt ?? "";
+  }
+
   public getMetricsSnapshot(): AgentMetricsSnapshot {
     const byLifecycle: Record<string, number> = {};
     let withActiveForegroundTurn = 0;
@@ -816,7 +823,9 @@ export class AgentManager {
             },
           };
     this.requireEnabledProvider(injectedConfig.provider);
-    const normalizedConfig = await this.normalizeConfig(injectedConfig);
+    const normalizedConfig = this.applyDaemonAppendSystemPrompt(
+      await this.normalizeConfig(injectedConfig),
+    );
     const launchContext = this.buildLaunchContext(resolvedAgentId);
     const client = await this.requireAvailableClient({
       provider: normalizedConfig.provider,
@@ -860,7 +869,9 @@ export class AgentManager {
       ...overrides,
       provider: handle.provider,
     } as AgentSessionConfig;
-    const normalizedConfig = await this.normalizeConfig(mergedConfig);
+    const normalizedConfig = this.applyDaemonAppendSystemPrompt(
+      await this.normalizeConfig(mergedConfig),
+    );
     const resumeOverrides: Partial<AgentSessionConfig> = { ...overrides };
     let hasResumeOverrides = overrides !== undefined;
 
@@ -874,6 +885,11 @@ export class AgentManager {
       hasResumeOverrides = true;
     }
 
+    if (metadata.daemonAppendSystemPrompt !== normalizedConfig.daemonAppendSystemPrompt) {
+      resumeOverrides.daemonAppendSystemPrompt = normalizedConfig.daemonAppendSystemPrompt;
+      hasResumeOverrides = true;
+    }
+
     const launchContext = this.buildLaunchContext(resolvedAgentId);
     const client = this.requireClient(handle.provider);
     const available = await client.isAvailable();
@@ -919,7 +935,9 @@ export class AgentManager {
       ...overrides,
       provider,
     } as AgentSessionConfig;
-    const normalizedConfig = await this.normalizeConfig(refreshConfig);
+    const normalizedConfig = this.applyDaemonAppendSystemPrompt(
+      await this.normalizeConfig(refreshConfig),
+    );
     const launchContext = this.buildLaunchContext(agentId);
 
     const session = handle
@@ -3437,6 +3455,26 @@ export class AgentManager {
     return normalized;
   }
 
+  private applyDaemonAppendSystemPrompt(config: AgentSessionConfig): AgentSessionConfig {
+    if (config.provider === "pi") {
+      const next = { ...config };
+      delete next.daemonAppendSystemPrompt;
+      return next;
+    }
+
+    const trimmed = this.appendSystemPrompt.trim();
+    if (!trimmed) {
+      const next = { ...config };
+      delete next.daemonAppendSystemPrompt;
+      return next;
+    }
+
+    return {
+      ...config,
+      daemonAppendSystemPrompt: trimmed,
+    };
+  }
+
   private buildLaunchContext(agentId: string): AgentLaunchContext {
     return {
       agentId,

packages/server/src/server/agent/agent-sdk-types.ts

@@ -473,6 +473,11 @@ export interface AgentSessionConfig {
    * Mapped by each provider to its native instruction field.
    */
   systemPrompt?: string;
+  /**
+   * Daemon-level instructions appended at runtime. This is deliberately not
+   * persisted into agent config so daemon setting changes apply cleanly.
+   */
+  daemonAppendSystemPrompt?: string;
   modeId?: string;
   model?: string;
   thinkingOptionId?: string;

packages/server/src/server/agent/orchestrator-instructions.ts

@@ -1,50 +0,0 @@
-/**
- * Returns orchestrator mode instructions to append to the system prompt.
- * These instructions are from CLAUDE.md and guide agents on how to work
- * effectively in this repository.
- */
-export function getOrchestratorModeInstructions(): string {
-  return `
-<orchestrator-mode>
-Activation:
-- Only activate if the user explicitly says "go into orchestrator mode" (or similar).
-- Otherwise, do work directly yourself; do not spawn agents.
-
-Core rules:
-- In orchestrator mode, you accomplish tasks only by managing agents; do not perform the work yourself.
-- Always prefix agent titles (e.g., "🎭 Feature Implementation", "🎭 Design Discussion").
-- Set cwd to the repository root and choose the most permissive mode available.
-- If an agent control tool call fails, list agents before launching another; it may just be a wait timeout.
-
-Context management:
-- Reuse an existing agent when the next step needs the same context (same files/module/folder or immediate follow-up like investigate → fix in the same area).
-- Start a new agent when switching to a different area/module, or when an agent has run long and its context feels stale.
-- Prefer sending follow-up prompts to an existing agent to avoid reloading context.
-- Use multiple agents when roles diverge (e.g., one for refactor, one for external validation), but default to reuse when context overlaps.
-
-Conversation with agents:
-- Engage actively: ask pointed questions, probe risks, and request clarifications before accepting proposals.
-- Encourage agents to validate assumptions, consider edge cases, and describe how they will test/verify.
-
-Agent selection guidance:
-- Codex: methodical and slower; great for deep debugging, tracing code paths, refactoring, complex features, and design discussions.
-- Claude: fast; strong at tool use, agentic control, and managing other agents; may jump to conclusions—ask it to verify.
-
-Clarifying ambiguous requests:
-- Research first to understand the current state.
-- Ask clarifying questions about what the user wants.
-- Present options with trade-offs.
-- Get explicit confirmation; never assume.
-
-Investigation vs Implementation:
-- Investigate only unless explicitly asked to implement.
-- Report findings clearly.
-- After investigation, ask for direction before implementing.
-
-Tool usage discipline:
-- Do not ask users to run commands—run them yourself.
-- Do not repeat the user’s instructions verbatim—summarize them in your own words.
-- Be explicit about results—tell the user what happened after every command.
-</orchestrator-mode>
-`;
-}

packages/server/src/server/agent/providers/claude/agent.ts

@@ -81,7 +81,7 @@ import {
 import { findExecutable, isCommandAvailable } from "../../../../utils/executable.js";
 import { withTimeout } from "../../../../utils/promise-timeout.js";
 import { execCommand } from "../../../../utils/spawn.js";
-import { getOrchestratorModeInstructions } from "../../orchestrator-instructions.js";
+import { composeSystemPromptParts } from "../../system-prompt.js";
 
 const fsPromises = promises;
 const CLAUDE_SETTING_SOURCES: NonNullable<ClaudeOptions["settingSources"]> = [
@@ -2314,9 +2314,9 @@ class ClaudeAgentSession implements AgentSession {
   }
 
   private buildAppendedSystemPrompt(): string {
-    return [getOrchestratorModeInstructions(), this.config.systemPrompt?.trim()]
-      .filter((entry): entry is string => typeof entry === "string" && entry.length > 0)
-      .join("\n\n");
+    return (
+      composeSystemPromptParts(this.config.systemPrompt, this.config.daemonAppendSystemPrompt) ?? ""
+    );
   }
 
   private buildSdkEnv(extraClaudeOptions: Partial<ClaudeOptions> | undefined): NodeJS.ProcessEnv {
@@ -2365,7 +2365,7 @@ class ClaudeAgentSession implements AgentSession {
       canUseTool: this.handlePermissionRequest,
       pathToClaudeCodeExecutable: claudeBinary,
       // Use Claude Code preset system prompt and load CLAUDE.md files
-      // Append provider-agnostic system prompt and orchestrator instructions for agents.
+      // Append provider-agnostic system prompts for agents.
       systemPrompt: {
         type: "preset",
         preset: "claude_code",

packages/server/src/server/agent/providers/codex-app-server-agent.ts

@@ -41,6 +41,7 @@ import os from "node:os";
 import path from "node:path";
 import { z } from "zod";
 import { renderPromptAttachmentAsText } from "../prompt-attachments.js";
+import { composeSystemPromptParts } from "../system-prompt.js";
 import { curateAgentActivity } from "../activity-curator.js";
 import {
   mapCodexRolloutToolCall,
@@ -3026,12 +3027,11 @@ class CodexAppServerAgentSession implements AgentSession {
     const settings: Record<string, unknown> = {};
     if (match.model) settings.model = match.model;
     if (match.reasoning_effort) settings.reasoning_effort = match.reasoning_effort;
-    const developerInstructions = [
-      match.developer_instructions?.trim(),
-      this.config.systemPrompt?.trim(),
-    ]
-      .filter((entry): entry is string => typeof entry === "string" && entry.length > 0)
-      .join("\n\n");
+    const developerInstructions = composeSystemPromptParts(
+      match.developer_instructions,
+      this.config.systemPrompt,
+      this.config.daemonAppendSystemPrompt,
+    );
     if (developerInstructions) settings.developer_instructions = developerInstructions;
     if (this.config.model) settings.model = this.config.model;
     const thinkingOptionId = normalizeCodexThinkingOptionId(this.config.thinkingOptionId);
@@ -3161,8 +3161,12 @@ class CodexAppServerAgentSession implements AgentSession {
         return;
       }
       const params: Record<string, unknown> = { threadId: this.currentThreadId };
-      if (this.config.systemPrompt?.trim()) {
-        params.developerInstructions = this.config.systemPrompt.trim();
+      const developerInstructions = composeSystemPromptParts(
+        this.config.systemPrompt,
+        this.config.daemonAppendSystemPrompt,
+      );
+      if (developerInstructions) {
+        params.developerInstructions = developerInstructions;
       }
       const codexConfig = this.buildCodexInnerConfig();
       if (codexConfig) {
@@ -3257,6 +3261,7 @@ class CodexAppServerAgentSession implements AgentSession {
     approvalPolicy: string;
     sandboxPolicyType: string;
     hasOutputSchema: boolean;
+    hasDeveloperInstructions: boolean;
     hasCodexConfig: boolean;
   }> {
     const input = await this.buildUserInput(prompt);
@@ -3299,8 +3304,12 @@ class CodexAppServerAgentSession implements AgentSession {
     if (options?.outputSchema) {
       params.outputSchema = normalizeCodexOutputSchema(options.outputSchema);
     }
-    if (this.config.systemPrompt?.trim()) {
-      params.developerInstructions = this.config.systemPrompt.trim();
+    const developerInstructions = composeSystemPromptParts(
+      this.config.systemPrompt,
+      this.config.daemonAppendSystemPrompt,
+    );
+    if (developerInstructions) {
+      params.developerInstructions = developerInstructions;
     }
     const codexConfig = this.buildCodexInnerConfig();
     if (codexConfig) {
@@ -3313,6 +3322,7 @@ class CodexAppServerAgentSession implements AgentSession {
       approvalPolicy,
       sandboxPolicyType,
       hasOutputSchema: Boolean(options?.outputSchema),
+      hasDeveloperInstructions: Boolean(developerInstructions),
       hasCodexConfig: Boolean(codexConfig),
     };
   }
@@ -3323,6 +3333,7 @@ class CodexAppServerAgentSession implements AgentSession {
     approvalPolicy,
     sandboxPolicyType,
     hasOutputSchema,
+    hasDeveloperInstructions,
     hasCodexConfig,
   }: {
     turnId: string;
@@ -3330,6 +3341,7 @@ class CodexAppServerAgentSession implements AgentSession {
     approvalPolicy: string;
     sandboxPolicyType: string;
     hasOutputSchema: boolean;
+    hasDeveloperInstructions: boolean;
     hasCodexConfig: boolean;
   }): void {
     this.logger.info(
@@ -3345,7 +3357,7 @@ class CodexAppServerAgentSession implements AgentSession {
         sandboxPolicyType,
         hasCollaborationMode: Boolean(this.resolvedCollaborationMode),
         hasOutputSchema,
-        hasDeveloperInstructions: Boolean(this.config.systemPrompt?.trim()),
+        hasDeveloperInstructions,
         hasCodexConfig,
       },
       "Starting Codex app-server turn",
@@ -3407,6 +3419,7 @@ class CodexAppServerAgentSession implements AgentSession {
         approvalPolicy: turnStart.approvalPolicy,
         sandboxPolicyType: turnStart.sandboxPolicyType,
         hasOutputSchema: turnStart.hasOutputSchema,
+        hasDeveloperInstructions: turnStart.hasDeveloperInstructions,
         hasCodexConfig: turnStart.hasCodexConfig,
       });
       await this.client.request("turn/start", turnStart.params, TURN_START_TIMEOUT_MS);
@@ -3952,14 +3965,16 @@ class CodexAppServerAgentSession implements AgentSession {
     const approvalPolicy = this.config.approvalPolicy ?? preset.approvalPolicy;
     const sandbox = this.config.sandboxMode ?? preset.sandbox;
     const innerConfig = this.buildCodexInnerConfig();
+    const developerInstructions = composeSystemPromptParts(
+      this.config.systemPrompt,
+      this.config.daemonAppendSystemPrompt,
+    );
     const params: Record<string, unknown> = {
       model,
       cwd: this.config.cwd ?? null,
       approvalPolicy,
       sandbox,
-      ...(this.config.systemPrompt?.trim()
-        ? { developerInstructions: this.config.systemPrompt.trim() }
-        : {}),
+      ...(developerInstructions ? { developerInstructions } : {}),
       ...(innerConfig ? { config: innerConfig } : {}),
       ...(this.ephemeral ? { ephemeral: true } : {}),
     };

packages/server/src/server/agent/providers/opencode-agent.ts

@@ -60,6 +60,7 @@ import {
 } from "./diagnostic-utils.js";
 import { runProviderTurn } from "./provider-runner.js";
 import { renderPromptAttachmentAsText } from "../prompt-attachments.js";
+import { composeSystemPromptParts } from "../system-prompt.js";
 import {
   createSdkOpenCodeClient,
   type OpenCodeRuntime,
@@ -2589,6 +2590,10 @@ class OpenCodeAgentSession implements AgentSession {
           partTypes: parts.map((p) => p.type),
         });
         try {
+          const systemPrompt = composeSystemPromptParts(
+            this.config.systemPrompt,
+            this.config.daemonAppendSystemPrompt,
+          );
           const promptResponse = await this.client.session.promptAsync({
             sessionID: this.sessionId,
             directory: this.config.cwd,
@@ -2601,7 +2606,7 @@ class OpenCodeAgentSession implements AgentSession {
                   },
                 }
               : {}),
-            ...(this.config.systemPrompt ? { system: this.config.systemPrompt } : {}),
+            ...(systemPrompt ? { system: systemPrompt } : {}),
             ...(model ? { model } : {}),
             ...(effectiveMode ? { agent: effectiveMode } : {}),
             ...(effectiveVariant ? { variant: effectiveVariant } : {}),

packages/server/src/server/agent/system-prompt.ts

@@ -0,0 +1,10 @@
+export function composeSystemPromptParts(
+  ...parts: Array<string | null | undefined>
+): string | undefined {
+  const prompt = parts
+    .map((part) => part?.trim())
+    .filter((part): part is string => typeof part === "string" && part.length > 0)
+    .join("\n\n");
+
+  return prompt.length > 0 ? prompt : undefined;
+}

packages/server/src/server/bootstrap.ts

@@ -230,6 +230,7 @@ export interface PaseoDaemonConfig {
   mcpEnabled?: boolean;
   mcpInjectIntoAgents?: boolean;
   autoArchiveAfterMerge?: boolean;
+  appendSystemPrompt?: string;
   staticDir: string;
   mcpDebug: boolean;
   isDev?: boolean;
@@ -290,6 +291,7 @@ export async function createPaseoDaemon(
         ]),
       ),
       autoArchiveAfterMerge: config.autoArchiveAfterMerge ?? false,
+      appendSystemPrompt: config.appendSystemPrompt ?? "",
     },
     logger,
   );
@@ -516,6 +518,7 @@ export async function createPaseoDaemon(
     },
     providerDefinitions: providerRegistry,
     registry: agentStorage,
+    appendSystemPrompt: config.appendSystemPrompt,
     logger,
   });
 
@@ -862,6 +865,9 @@ export async function createPaseoDaemon(
           daemonConfigStore.onFieldChange("mcp.injectIntoAgents", (value) => {
             agentManager.setMcpBaseUrl(value ? mcpBaseUrl : null);
           });
+          daemonConfigStore.onFieldChange("appendSystemPrompt", (value) => {
+            agentManager.setAppendSystemPrompt(typeof value === "string" ? value : "");
+          });
           const relayEnabled = config.relayEnabled ?? true;
           const relayEndpoint = config.relayEndpoint ?? "relay.paseo.sh:443";
           const relayPublicEndpoint = config.relayPublicEndpoint ?? relayEndpoint;

packages/server/src/server/config.ts

@@ -256,6 +256,10 @@ function resolveAuthConfig(
     : undefined;
 }
 
+function resolveAppendSystemPrompt(persisted: ReturnType<typeof loadPersistedConfig>): string {
+  return persisted.daemon?.appendSystemPrompt ?? "";
+}
+
 function resolveStaticLoadConfigSettings(
   env: NodeJS.ProcessEnv,
   cli: CliConfigOverrides | undefined,
@@ -266,6 +270,7 @@ function resolveStaticLoadConfigSettings(
     mcpInjectIntoAgents:
       cli?.mcpInjectIntoAgents ?? persisted.daemon?.mcp?.injectIntoAgents ?? false,
     autoArchiveAfterMerge: persisted.daemon?.autoArchiveAfterMerge ?? false,
+    appendSystemPrompt: resolveAppendSystemPrompt(persisted),
     hostnames: mergeHostnames([
       persisted.daemon?.hostnames,
       parseHostnamesEnv(env.PASEO_HOSTNAMES ?? env.PASEO_ALLOWED_HOSTS),
@@ -286,8 +291,14 @@ export function loadConfig(
   const persisted = loadPersistedConfig(paseoHome);
 
   const listen = resolveListenAddress(env, options?.cli, persisted);
-  const { mcpEnabled, mcpInjectIntoAgents, autoArchiveAfterMerge, hostnames, appBaseUrl } =
-    resolveStaticLoadConfigSettings(env, options?.cli, persisted);
+  const {
+    mcpEnabled,
+    mcpInjectIntoAgents,
+    autoArchiveAfterMerge,
+    appendSystemPrompt,
+    hostnames,
+    appBaseUrl,
+  } = resolveStaticLoadConfigSettings(env, options?.cli, persisted);
 
   const relay = resolveRelayConfig({
     env,
@@ -315,6 +326,7 @@ export function loadConfig(
     mcpEnabled,
     mcpInjectIntoAgents,
     autoArchiveAfterMerge,
+    appendSystemPrompt,
     mcpDebug: env.MCP_DEBUG === "1",
     isDev: resolvePaseoNodeEnv(env) === "development",
     agentStoragePath: path.join(paseoHome, "agents"),

packages/server/src/server/daemon-config-store.test.ts

@@ -107,6 +107,28 @@ describe("DaemonConfigStore", () => {
     });
   });
 
+  test("patch persists append system prompt into config.json", () => {
+    const paseoHome = mkdtempSync(path.join(tmpdir(), "paseo-daemon-config-store-"));
+    tempDirs.push(paseoHome);
+
+    const store = new DaemonConfigStore(
+      paseoHome,
+      {
+        mcp: { injectIntoAgents: false },
+        providers: {},
+        appendSystemPrompt: "",
+      },
+      undefined,
+    );
+
+    store.patch({
+      appendSystemPrompt: "Prefer terse replies.",
+    });
+
+    const persisted = loadPersistedConfig(paseoHome);
+    expect(persisted.daemon?.appendSystemPrompt).toBe("Prefer terse replies.");
+  });
+
   test("patch persists provider additional models into config.json", () => {
     const paseoHome = mkdtempSync(path.join(tmpdir(), "paseo-daemon-config-store-"));
     tempDirs.push(paseoHome);

packages/server/src/server/daemon-config-store.ts

@@ -186,6 +186,7 @@ function mergeMutableConfigIntoPersistedConfig(params: {
         injectIntoAgents: mutable.mcp.injectIntoAgents,
       },
       autoArchiveAfterMerge: mutable.autoArchiveAfterMerge,
+      appendSystemPrompt: mutable.appendSystemPrompt,
     },
     agents:
       providerOverrides && Object.keys(providerOverrides).length > 0

packages/server/src/server/persisted-config.test.ts

@@ -34,6 +34,18 @@ describe("PersistedConfigSchema daemon auth config", () => {
   });
 });
 
+describe("PersistedConfigSchema daemon append system prompt config", () => {
+  test("accepts optional append system prompt", () => {
+    const parsed = PersistedConfigSchema.parse({
+      daemon: {
+        appendSystemPrompt: "Prefer terse replies.",
+      },
+    });
+
+    expect(parsed.daemon?.appendSystemPrompt).toBe("Prefer terse replies.");
+  });
+});
+
 describe("PersistedConfigSchema daemon relay config", () => {
   test("accepts optional relay TLS setting", () => {
     const parsed = PersistedConfigSchema.parse({

packages/server/src/server/persisted-config.ts

@@ -251,6 +251,7 @@ export const PersistedConfigSchema = z
           .passthrough()
           .optional(),
         autoArchiveAfterMerge: z.boolean().optional(),
+        appendSystemPrompt: z.string().optional(),
         cors: z
           .object({
             allowedOrigins: z.array(z.string()).optional(),

packages/server/src/shared/messages.ts

@@ -114,6 +114,7 @@ export const MutableDaemonConfigSchema = z
       .passthrough(),
     providers: z.record(z.string(), MutableDaemonProviderConfigSchema).default({}),
     autoArchiveAfterMerge: z.boolean().default(false),
+    appendSystemPrompt: z.string().default(""),
   })
   .passthrough();
 
@@ -124,6 +125,7 @@ export const MutableDaemonConfigPatchSchema = z
       .record(z.string(), MutableDaemonProviderConfigSchema.partial().passthrough())
       .optional(),
     autoArchiveAfterMerge: z.boolean().optional(),
+    appendSystemPrompt: z.string().optional(),
   })
   .partial()
   .passthrough();