Merge branch 'cw/agent-details' into cw-merge-1772802959182

apps/server/agent/lifecycle/cleanup-strategy.ts

@@ -18,6 +18,7 @@ export interface AgentInfo {
   status: string;
   initiativeId?: string | null;
   worktreeId: string;
+  exitCode?: number | null;
 }
 
 export interface CleanupStrategy {

apps/server/agent/lifecycle/controller.ts

@@ -374,6 +374,7 @@ export class AgentLifecycleController {
       status: agent.status,
       initiativeId: agent.initiativeId,
       worktreeId: agent.worktreeId,
+      exitCode: agent.exitCode ?? null,
     };
   }
 }

apps/server/agent/manager.ts

@@ -347,7 +347,7 @@ export class MultiProviderAgentManager implements AgentManager {
       this.createLogChunkCallback(agentId, alias, 1),
     );
 
-    await this.repository.update(agentId, { pid, outputFilePath });
+    await this.repository.update(agentId, { pid, outputFilePath, prompt });
 
     // Register agent and start polling BEFORE non-critical I/O so that a
     // diagnostic-write failure can never orphan a running process.
@@ -1182,6 +1182,8 @@ export class MultiProviderAgentManager implements AgentManager {
     createdAt: Date;
     updatedAt: Date;
     userDismissedAt?: Date | null;
+    exitCode?: number | null;
+    prompt?: string | null;
   }): AgentInfo {
     return {
       id: agent.id,
@@ -1197,6 +1199,8 @@ export class MultiProviderAgentManager implements AgentManager {
       createdAt: agent.createdAt,
       updatedAt: agent.updatedAt,
       userDismissedAt: agent.userDismissedAt,
+      exitCode: agent.exitCode ?? null,
+      prompt: agent.prompt ?? null,
     };
   }
 }

apps/server/agent/mock-manager.ts

@@ -142,6 +142,8 @@ export class MockAgentManager implements AgentManager {
       accountId: null,
       createdAt: now,
       updatedAt: now,
+      exitCode: null,
+      prompt: null,
     };
 
     const record: MockAgentRecord = {

apps/server/agent/types.ts

@@ -95,6 +95,10 @@ export interface AgentInfo {
   updatedAt: Date;
   /** When the user dismissed this agent (null if not dismissed) */
   userDismissedAt?: Date | null;
+  /** Process exit code — null while running or if not yet exited */
+  exitCode: number | null;
+  /** Full assembled prompt passed to the agent process — null for agents spawned before DB persistence */
+  prompt: string | null;
 }
 
 /**

apps/server/db/repositories/agent-repository.ts

@@ -45,6 +45,7 @@ export interface UpdateAgentData {
   accountId?: string | null;
   pid?: number | null;
   exitCode?: number | null;
+  prompt?: string | null;
   outputFilePath?: string | null;
   result?: string | null;
   pendingQuestions?: string | null;

apps/server/db/schema.ts

@@ -267,6 +267,7 @@ export const agents = sqliteTable('agents', {
     .default('execute'),
   pid: integer('pid'),
   exitCode: integer('exit_code'), // Process exit code for debugging crashes
+  prompt: text('prompt'), // Full assembled prompt passed to the agent process (persisted for durability after log cleanup)
   outputFilePath: text('output_file_path'),
   result: text('result'),
   pendingQuestions: text('pending_questions'),

apps/server/dispatch/manager.test.ts

@@ -70,6 +70,8 @@ function createMockAgentManager(
         accountId: null,
         createdAt: new Date(),
         updatedAt: new Date(),
+        exitCode: null,
+        prompt: null,
       };
       mockAgents.push(newAgent);
       return newAgent;
@@ -101,6 +103,8 @@ function createIdleAgent(id: string, name: string): AgentInfo {
     accountId: null,
     createdAt: new Date(),
     updatedAt: new Date(),
+    exitCode: null,
+    prompt: null,
   };
 }
 

apps/server/drizzle/0036_icy_silvermane.sql

@@ -0,0 +1 @@
+ALTER TABLE `agents` ADD `prompt` text;

apps/server/drizzle/meta/_journal.json

@@ -253,6 +253,13 @@
       "when": 1772796561474,
       "tag": "0035_faulty_human_fly",
       "breakpoints": true
+    },
+    {
+      "idx": 36,
+      "version": "6",
+      "when": 1772798869413,
+      "tag": "0036_icy_silvermane",
+      "breakpoints": true
     }
   ]
-}
+}

apps/server/test/integration/crash-race-condition.test.ts

@@ -32,6 +32,7 @@ interface TestAgent {
   initiativeId: string | null;
   userDismissedAt: Date | null;
   exitCode: number | null;
+  prompt: string | null;
 }
 
 describe('Crash marking race condition', () => {
@@ -72,7 +73,8 @@ describe('Crash marking race condition', () => {
       pendingQuestions: null,
       initiativeId: 'init-1',
       userDismissedAt: null,
-      exitCode: null
+      exitCode: null,
+      prompt: null,
     };
 
     // Mock repository that tracks all update calls

apps/server/trpc/routers/agent.test.ts

@@ -0,0 +1,327 @@
+/**
+ * Agent Router Tests
+ *
+ * Tests for getAgent (exitCode, taskName, initiativeName),
+ * getAgentInputFiles, and getAgentPrompt procedures.
+ */
+
+import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
+import fs from 'fs/promises';
+import path from 'path';
+import os from 'os';
+import { appRouter, createCallerFactory } from '../index.js';
+import type { TRPCContext } from '../context.js';
+import type { EventBus } from '../../events/types.js';
+
+const createCaller = createCallerFactory(appRouter);
+
+function createMockEventBus(): EventBus {
+  return {
+    emit: vi.fn(),
+    on: vi.fn(),
+    off: vi.fn(),
+    once: vi.fn(),
+  };
+}
+
+function createTestContext(overrides: Partial<TRPCContext> = {}): TRPCContext {
+  return {
+    eventBus: createMockEventBus(),
+    serverStartedAt: new Date('2026-01-30T12:00:00Z'),
+    processCount: 0,
+    ...overrides,
+  };
+}
+
+/** Minimal AgentInfo fixture matching the full interface */
+function makeAgentInfo(overrides: Record<string, unknown> = {}) {
+  return {
+    id: 'agent-1',
+    name: 'test-agent',
+    taskId: null,
+    initiativeId: null,
+    sessionId: null,
+    worktreeId: 'test-agent',
+    status: 'stopped' as const,
+    mode: 'execute' as const,
+    provider: 'claude',
+    accountId: null,
+    createdAt: new Date('2026-01-01T00:00:00Z'),
+    updatedAt: new Date('2026-01-01T00:00:00Z'),
+    userDismissedAt: null,
+    exitCode: null,
+    prompt: null,
+    ...overrides,
+  };
+}
+
+describe('getAgent', () => {
+  it('returns exitCode: 1 when agent has exitCode 1', async () => {
+    const mockManager = {
+      get: vi.fn().mockResolvedValue(makeAgentInfo({ exitCode: 1 })),
+    };
+
+    const ctx = createTestContext({ agentManager: mockManager as any });
+    const caller = createCaller(ctx);
+    const result = await caller.getAgent({ id: 'agent-1' });
+
+    expect(result.exitCode).toBe(1);
+  });
+
+  it('returns exitCode: null when agent has no exitCode', async () => {
+    const mockManager = {
+      get: vi.fn().mockResolvedValue(makeAgentInfo({ exitCode: null })),
+    };
+
+    const ctx = createTestContext({ agentManager: mockManager as any });
+    const caller = createCaller(ctx);
+    const result = await caller.getAgent({ id: 'agent-1' });
+
+    expect(result.exitCode).toBeNull();
+  });
+
+  it('returns taskName and initiativeName from repositories', async () => {
+    const mockManager = {
+      get: vi.fn().mockResolvedValue(makeAgentInfo({ taskId: 'task-1', initiativeId: 'init-1' })),
+    };
+    const mockTaskRepo = {
+      findById: vi.fn().mockResolvedValue({ id: 'task-1', name: 'My Task' }),
+    };
+    const mockInitiativeRepo = {
+      findById: vi.fn().mockResolvedValue({ id: 'init-1', name: 'My Initiative' }),
+    };
+
+    const ctx = createTestContext({
+      agentManager: mockManager as any,
+      taskRepository: mockTaskRepo as any,
+      initiativeRepository: mockInitiativeRepo as any,
+    });
+    const caller = createCaller(ctx);
+    const result = await caller.getAgent({ id: 'agent-1' });
+
+    expect(result.taskName).toBe('My Task');
+    expect(result.initiativeName).toBe('My Initiative');
+  });
+
+  it('returns taskName: null and initiativeName: null when agent has no taskId or initiativeId', async () => {
+    const mockManager = {
+      get: vi.fn().mockResolvedValue(makeAgentInfo({ taskId: null, initiativeId: null })),
+    };
+
+    const ctx = createTestContext({ agentManager: mockManager as any });
+    const caller = createCaller(ctx);
+    const result = await caller.getAgent({ id: 'agent-1' });
+
+    expect(result.taskName).toBeNull();
+    expect(result.initiativeName).toBeNull();
+  });
+});
+
+describe('getAgentInputFiles', () => {
+  let tmpDir: string;
+
+  beforeEach(async () => {
+    tmpDir = await fs.mkdtemp(path.join(os.tmpdir(), 'agent-test-'));
+  });
+
+  afterEach(async () => {
+    await fs.rm(tmpDir, { recursive: true, force: true });
+  });
+
+  function makeAgentManagerWithWorktree(worktreeId = 'test-worktree', agentName = 'test-agent') {
+    return {
+      get: vi.fn().mockResolvedValue(makeAgentInfo({ worktreeId, name: agentName })),
+    };
+  }
+
+  it('returns worktree_missing when worktree dir does not exist', async () => {
+    const nonExistentRoot = path.join(tmpDir, 'no-such-dir');
+    const mockManager = makeAgentManagerWithWorktree('test-worktree');
+
+    const ctx = createTestContext({
+      agentManager: mockManager as any,
+      workspaceRoot: nonExistentRoot,
+    });
+    const caller = createCaller(ctx);
+    const result = await caller.getAgentInputFiles({ id: 'agent-1' });
+
+    expect(result).toEqual({ files: [], reason: 'worktree_missing' });
+  });
+
+  it('returns input_dir_missing when worktree exists but .cw/input does not', async () => {
+    const worktreeId = 'test-worktree';
+    const worktreeRoot = path.join(tmpDir, 'agent-workdirs', worktreeId);
+    await fs.mkdir(worktreeRoot, { recursive: true });
+
+    const mockManager = makeAgentManagerWithWorktree(worktreeId);
+    const ctx = createTestContext({
+      agentManager: mockManager as any,
+      workspaceRoot: tmpDir,
+    });
+    const caller = createCaller(ctx);
+    const result = await caller.getAgentInputFiles({ id: 'agent-1' });
+
+    expect(result).toEqual({ files: [], reason: 'input_dir_missing' });
+  });
+
+  it('returns sorted file list with correct name, content, sizeBytes', async () => {
+    const worktreeId = 'test-worktree';
+    const inputDir = path.join(tmpDir, 'agent-workdirs', worktreeId, '.cw', 'input');
+    await fs.mkdir(inputDir, { recursive: true });
+    await fs.mkdir(path.join(inputDir, 'pages'), { recursive: true });
+
+    const manifestContent = '{"files": ["a"]}';
+    const fooContent = '# Foo\nHello world';
+    await fs.writeFile(path.join(inputDir, 'manifest.json'), manifestContent);
+    await fs.writeFile(path.join(inputDir, 'pages', 'foo.md'), fooContent);
+
+    const mockManager = makeAgentManagerWithWorktree(worktreeId);
+    const ctx = createTestContext({
+      agentManager: mockManager as any,
+      workspaceRoot: tmpDir,
+    });
+    const caller = createCaller(ctx);
+    const result = await caller.getAgentInputFiles({ id: 'agent-1' });
+
+    expect(result.reason).toBeUndefined();
+    expect(result.files).toHaveLength(2);
+    // Sorted alphabetically: manifest.json before pages/foo.md
+    expect(result.files[0].name).toBe('manifest.json');
+    expect(result.files[0].content).toBe(manifestContent);
+    expect(result.files[0].sizeBytes).toBe(Buffer.byteLength(manifestContent));
+    expect(result.files[1].name).toBe(path.join('pages', 'foo.md'));
+    expect(result.files[1].content).toBe(fooContent);
+    expect(result.files[1].sizeBytes).toBe(Buffer.byteLength(fooContent));
+  });
+
+  it('skips binary files (containing null byte)', async () => {
+    const worktreeId = 'test-worktree';
+    const inputDir = path.join(tmpDir, 'agent-workdirs', worktreeId, '.cw', 'input');
+    await fs.mkdir(inputDir, { recursive: true });
+
+    // Binary file with null byte
+    const binaryData = Buffer.from([0x89, 0x50, 0x00, 0x4e, 0x47]);
+    await fs.writeFile(path.join(inputDir, 'image.png'), binaryData);
+    // Text file should still be returned
+    await fs.writeFile(path.join(inputDir, 'text.txt'), 'hello');
+
+    const mockManager = makeAgentManagerWithWorktree(worktreeId);
+    const ctx = createTestContext({
+      agentManager: mockManager as any,
+      workspaceRoot: tmpDir,
+    });
+    const caller = createCaller(ctx);
+    const result = await caller.getAgentInputFiles({ id: 'agent-1' });
+
+    expect(result.files).toHaveLength(1);
+    expect(result.files[0].name).toBe('text.txt');
+  });
+
+  it('truncates files larger than 500 KB and preserves original sizeBytes', async () => {
+    const worktreeId = 'test-worktree';
+    const inputDir = path.join(tmpDir, 'agent-workdirs', worktreeId, '.cw', 'input');
+    await fs.mkdir(inputDir, { recursive: true });
+
+    const MAX_SIZE = 500 * 1024;
+    const largeContent = Buffer.alloc(MAX_SIZE + 100 * 1024, 'a'); // 600 KB
+    await fs.writeFile(path.join(inputDir, 'big.txt'), largeContent);
+
+    const mockManager = makeAgentManagerWithWorktree(worktreeId);
+    const ctx = createTestContext({
+      agentManager: mockManager as any,
+      workspaceRoot: tmpDir,
+    });
+    const caller = createCaller(ctx);
+    const result = await caller.getAgentInputFiles({ id: 'agent-1' });
+
+    expect(result.files).toHaveLength(1);
+    expect(result.files[0].sizeBytes).toBe(largeContent.length);
+    expect(result.files[0].content).toContain('[truncated — file exceeds 500 KB]');
+  });
+});
+
+describe('getAgentPrompt', () => {
+  let tmpDir: string;
+
+  beforeEach(async () => {
+    tmpDir = await fs.mkdtemp(path.join(os.tmpdir(), 'agent-prompt-test-'));
+  });
+
+  afterEach(async () => {
+    await fs.rm(tmpDir, { recursive: true, force: true });
+  });
+
+  it('returns prompt_not_written when PROMPT.md does not exist', async () => {
+    const mockManager = {
+      get: vi.fn().mockResolvedValue(makeAgentInfo({ name: 'test-agent' })),
+    };
+
+    const ctx = createTestContext({
+      agentManager: mockManager as any,
+      workspaceRoot: tmpDir,
+    });
+    const caller = createCaller(ctx);
+    const result = await caller.getAgentPrompt({ id: 'agent-1' });
+
+    expect(result).toEqual({ content: null, reason: 'prompt_not_written' });
+  });
+
+  it('returns prompt content when PROMPT.md exists', async () => {
+    const agentName = 'test-agent';
+    const promptDir = path.join(tmpDir, '.cw', 'agent-logs', agentName);
+    await fs.mkdir(promptDir, { recursive: true });
+    const promptContent = '# System\nHello';
+    await fs.writeFile(path.join(promptDir, 'PROMPT.md'), promptContent);
+
+    const mockManager = {
+      get: vi.fn().mockResolvedValue(makeAgentInfo({ name: agentName, prompt: null })),
+    };
+
+    const ctx = createTestContext({
+      agentManager: mockManager as any,
+      workspaceRoot: tmpDir,
+    });
+    const caller = createCaller(ctx);
+    const result = await caller.getAgentPrompt({ id: 'agent-1' });
+
+    expect(result).toEqual({ content: promptContent });
+  });
+
+  it('returns prompt from DB when agent.prompt is set (no file needed)', async () => {
+    const dbPromptContent = '# DB Prompt\nThis is persisted in the database';
+    const mockManager = {
+      get: vi.fn().mockResolvedValue(makeAgentInfo({ name: 'test-agent', prompt: dbPromptContent })),
+    };
+
+    // workspaceRoot has no PROMPT.md — but DB value takes precedence
+    const ctx = createTestContext({
+      agentManager: mockManager as any,
+      workspaceRoot: tmpDir,
+    });
+    const caller = createCaller(ctx);
+    const result = await caller.getAgentPrompt({ id: 'agent-1' });
+
+    expect(result).toEqual({ content: dbPromptContent });
+  });
+
+  it('falls back to PROMPT.md when agent.prompt is null in DB', async () => {
+    const agentName = 'test-agent';
+    const promptDir = path.join(tmpDir, '.cw', 'agent-logs', agentName);
+    await fs.mkdir(promptDir, { recursive: true });
+    const fileContent = '# File Prompt\nThis is from the file (legacy)';
+    await fs.writeFile(path.join(promptDir, 'PROMPT.md'), fileContent);
+
+    const mockManager = {
+      get: vi.fn().mockResolvedValue(makeAgentInfo({ name: agentName, prompt: null })),
+    };
+
+    const ctx = createTestContext({
+      agentManager: mockManager as any,
+      workspaceRoot: tmpDir,
+    });
+    const caller = createCaller(ctx);
+    const result = await caller.getAgentPrompt({ id: 'agent-1' });
+
+    expect(result).toEqual({ content: fileContent });
+  });
+});

apps/server/trpc/routers/agent.ts

@@ -5,11 +5,13 @@
 import { TRPCError } from '@trpc/server';
 import { z } from 'zod';
 import { tracked, type TrackedEnvelope } from '@trpc/server';
+import path from 'path';
+import fs from 'fs/promises';
 import type { ProcedureBuilder } from '../trpc.js';
 import type { TRPCContext } from '../context.js';
 import type { AgentInfo, AgentResult, PendingQuestions } from '../../agent/types.js';
 import type { AgentOutputEvent } from '../../events/types.js';
-import { requireAgentManager, requireLogChunkRepository } from './_helpers.js';
+import { requireAgentManager, requireLogChunkRepository, requireTaskRepository, requireInitiativeRepository } from './_helpers.js';
 
 export const spawnAgentInputSchema = z.object({
   name: z.string().min(1).optional(),
@@ -120,7 +122,23 @@ export function agentProcedures(publicProcedure: ProcedureBuilder) {
     getAgent: publicProcedure
       .input(agentIdentifierSchema)
       .query(async ({ ctx, input }) => {
-        return resolveAgent(ctx, input);
+        const agent = await resolveAgent(ctx, input);
+
+        let taskName: string | null = null;
+        let initiativeName: string | null = null;
+
+        if (agent.taskId) {
+          const taskRepo = requireTaskRepository(ctx);
+          const task = await taskRepo.findById(agent.taskId);
+          taskName = task?.name ?? null;
+        }
+        if (agent.initiativeId) {
+          const initiativeRepo = requireInitiativeRepository(ctx);
+          const initiative = await initiativeRepo.findById(agent.initiativeId);
+          initiativeName = initiative?.name ?? null;
+        }
+
+        return { ...agent, taskName, initiativeName };
       }),
 
     getAgentByName: publicProcedure
@@ -281,5 +299,116 @@ export function agentProcedures(publicProcedure: ProcedureBuilder) {
           cleanup();
         }
       }),
+
+    getAgentInputFiles: publicProcedure
+      .input(z.object({ id: z.string().min(1) }))
+      .output(z.object({
+        files: z.array(z.object({
+          name: z.string(),
+          content: z.string(),
+          sizeBytes: z.number(),
+        })),
+        reason: z.enum(['worktree_missing', 'input_dir_missing']).optional(),
+      }))
+      .query(async ({ ctx, input }) => {
+        const agent = await resolveAgent(ctx, { id: input.id });
+
+        const worktreeRoot = path.join(ctx.workspaceRoot!, 'agent-workdirs', agent.worktreeId);
+        const inputDir = path.join(worktreeRoot, '.cw', 'input');
+
+        // Check worktree root exists
+        try {
+          await fs.stat(worktreeRoot);
+        } catch {
+          return { files: [], reason: 'worktree_missing' as const };
+        }
+
+        // Check input dir exists
+        try {
+          await fs.stat(inputDir);
+        } catch {
+          return { files: [], reason: 'input_dir_missing' as const };
+        }
+
+        // Walk inputDir recursively
+        const entries = await fs.readdir(inputDir, { recursive: true, withFileTypes: true });
+        const MAX_SIZE = 500 * 1024;
+        const results: Array<{ name: string; content: string; sizeBytes: number }> = [];
+
+        for (const entry of entries) {
+          if (!entry.isFile()) continue;
+          // entry.parentPath is available in Node 20+
+          const dir = (entry as any).parentPath ?? (entry as any).path;
+          const fullPath = path.join(dir, entry.name);
+          const relativeName = path.relative(inputDir, fullPath);
+
+          try {
+            // Binary detection: read first 512 bytes
+            const fd = await fs.open(fullPath, 'r');
+            const headerBuf = Buffer.alloc(512);
+            const { bytesRead } = await fd.read(headerBuf, 0, 512, 0);
+            await fd.close();
+            if (headerBuf.slice(0, bytesRead).includes(0)) continue; // skip binary
+
+            const raw = await fs.readFile(fullPath);
+            const sizeBytes = raw.length;
+            let content: string;
+            if (sizeBytes > MAX_SIZE) {
+              content = raw.slice(0, MAX_SIZE).toString('utf-8') + '\n\n[truncated — file exceeds 500 KB]';
+            } else {
+              content = raw.toString('utf-8');
+            }
+            results.push({ name: relativeName, content, sizeBytes });
+          } catch {
+            continue; // skip unreadable files
+          }
+        }
+
+        results.sort((a, b) => a.name.localeCompare(b.name));
+        return { files: results };
+      }),
+
+    getAgentPrompt: publicProcedure
+      .input(z.object({ id: z.string().min(1) }))
+      .output(z.object({
+        content: z.string().nullable(),
+        reason: z.enum(['prompt_not_written']).optional(),
+      }))
+      .query(async ({ ctx, input }) => {
+        const agent = await resolveAgent(ctx, { id: input.id });
+
+        const MAX_BYTES = 1024 * 1024; // 1 MB
+
+        function truncateIfNeeded(text: string): string {
+          if (Buffer.byteLength(text, 'utf-8') > MAX_BYTES) {
+            const buf = Buffer.from(text, 'utf-8');
+            return buf.slice(0, MAX_BYTES).toString('utf-8') + '\n\n[truncated — prompt exceeds 1 MB]';
+          }
+          return text;
+        }
+
+        // Prefer DB-persisted prompt (durable even after log file cleanup)
+        if (agent.prompt !== null) {
+          return { content: truncateIfNeeded(agent.prompt) };
+        }
+
+        // Fall back to filesystem for agents spawned before DB persistence was added
+        const promptPath = path.join(ctx.workspaceRoot!, '.cw', 'agent-logs', agent.name, 'PROMPT.md');
+
+        let raw: string;
+        try {
+          raw = await fs.readFile(promptPath, 'utf-8');
+        } catch (err: any) {
+          if (err?.code === 'ENOENT') {
+            return { content: null, reason: 'prompt_not_written' as const };
+          }
+          throw new TRPCError({
+            code: 'INTERNAL_SERVER_ERROR',
+            message: `Failed to read prompt file: ${String(err)}`,
+          });
+        }
+
+        return { content: truncateIfNeeded(raw) };
+      }),
   };
 }

apps/web/src/components/AgentDetailsPanel.tsx

@@ -0,0 +1,230 @@
+import { useState, useEffect } from "react";
+import { Link } from "@tanstack/react-router";
+import { trpc } from "@/lib/trpc";
+import { cn } from "@/lib/utils";
+import { Skeleton } from "@/components/Skeleton";
+import { Button } from "@/components/ui/button";
+import { StatusDot } from "@/components/StatusDot";
+import { formatRelativeTime } from "@/lib/utils";
+import { modeLabel } from "@/lib/labels";
+
+export function AgentDetailsPanel({ agentId }: { agentId: string }) {
+  return (
+    <div className="h-full overflow-y-auto p-4 space-y-6">
+      <section>
+        <h3 className="text-xs font-semibold uppercase tracking-wide text-muted-foreground mb-3">Metadata</h3>
+        <MetadataSection agentId={agentId} />
+      </section>
+      <section>
+        <h3 className="text-xs font-semibold uppercase tracking-wide text-muted-foreground mb-3">Input Files</h3>
+        <InputFilesSection agentId={agentId} />
+      </section>
+      <section>
+        <h3 className="text-xs font-semibold uppercase tracking-wide text-muted-foreground mb-3">Effective Prompt</h3>
+        <EffectivePromptSection agentId={agentId} />
+      </section>
+    </div>
+  );
+}
+
+function MetadataSection({ agentId }: { agentId: string }) {
+  const query = trpc.getAgent.useQuery({ id: agentId });
+
+  if (query.isLoading) {
+    return (
+      <div className="space-y-2">
+        {Array.from({ length: 5 }).map((_, i) => (
+          <Skeleton key={i} variant="line" />
+        ))}
+      </div>
+    );
+  }
+
+  if (query.isError) {
+    return (
+      <div className="space-y-2">
+        <p className="text-sm text-destructive">{query.error.message}</p>
+        <Button variant="outline" size="sm" onClick={() => void query.refetch()}>Retry</Button>
+      </div>
+    );
+  }
+
+  const agent = query.data;
+  if (!agent) return null;
+
+  const showExitCode = !['idle', 'running', 'waiting_for_input'].includes(agent.status);
+
+  const rows: Array<{ label: string; value: React.ReactNode }> = [
+    {
+      label: 'Status',
+      value: (
+        <span className="flex items-center gap-1.5">
+          <StatusDot status={agent.status} size="sm" />
+          {agent.status}
+        </span>
+      ),
+    },
+    {
+      label: 'Mode',
+      value: modeLabel(agent.mode),
+    },
+    {
+      label: 'Provider',
+      value: agent.provider,
+    },
+    {
+      label: 'Initiative',
+      value: agent.initiativeId ? (
+        <Link
+          to="/initiatives/$initiativeId"
+          params={{ initiativeId: agent.initiativeId }}
+          className="underline underline-offset-2"
+        >
+          {(agent as { initiativeName?: string | null }).initiativeName ?? agent.initiativeId}
+        </Link>
+      ) : '—',
+    },
+    {
+      label: 'Task',
+      value: (agent as { taskName?: string | null }).taskName ?? (agent.taskId ? agent.taskId : '—'),
+    },
+    {
+      label: 'Created',
+      value: formatRelativeTime(String(agent.createdAt)),
+    },
+  ];
+
+  if (showExitCode) {
+    rows.push({
+      label: 'Exit Code',
+      value: (
+        <span className={agent.exitCode === 1 ? 'text-destructive' : ''}>
+          {agent.exitCode ?? '—'}
+        </span>
+      ),
+    });
+  }
+
+  return (
+    <div>
+      {rows.map(({ label, value }) => (
+        <div key={label} className="flex items-center gap-4 py-1.5 border-b border-border/30 last:border-0">
+          <span className="w-28 shrink-0 text-xs text-muted-foreground">{label}</span>
+          <span className="text-sm">{value}</span>
+        </div>
+      ))}
+    </div>
+  );
+}
+
+function InputFilesSection({ agentId }: { agentId: string }) {
+  const query = trpc.getAgentInputFiles.useQuery({ id: agentId });
+  const [selectedFile, setSelectedFile] = useState<string | null>(null);
+
+  useEffect(() => {
+    setSelectedFile(null);
+  }, [agentId]);
+
+  useEffect(() => {
+    if (!query.data?.files) return;
+    if (selectedFile !== null) return;
+    const manifest = query.data.files.find(f => f.name === 'manifest.json');
+    setSelectedFile(manifest?.name ?? query.data.files[0]?.name ?? null);
+  }, [query.data?.files]);
+
+  if (query.isLoading) {
+    return (
+      <div className="space-y-2">
+        <Skeleton variant="line" />
+        <Skeleton variant="line" />
+        <Skeleton variant="line" />
+      </div>
+    );
+  }
+
+  if (query.isError) {
+    return (
+      <div className="space-y-2">
+        <p className="text-sm text-destructive">{query.error.message}</p>
+        <Button variant="outline" size="sm" onClick={() => void query.refetch()}>Retry</Button>
+      </div>
+    );
+  }
+
+  const data = query.data;
+  if (!data) return null;
+
+  if (data.reason === 'worktree_missing') {
+    return <p className="text-sm text-muted-foreground">Worktree no longer exists — input files unavailable</p>;
+  }
+
+  if (data.reason === 'input_dir_missing') {
+    return <p className="text-sm text-muted-foreground">Input directory not found — this agent may not have received input files</p>;
+  }
+
+  const { files } = data;
+
+  if (files.length === 0) {
+    return <p className="text-sm text-muted-foreground">No input files found</p>;
+  }
+
+  return (
+    <div className="flex flex-col md:flex-row gap-2 min-h-0">
+      {/* File list */}
+      <div className="md:w-48 shrink-0 overflow-y-auto space-y-0.5">
+        {files.map(file => (
+          <button
+            key={file.name}
+            onClick={() => setSelectedFile(file.name)}
+            className={cn(
+              "w-full text-left px-2 py-1 text-xs rounded truncate",
+              selectedFile === file.name
+                ? "bg-muted font-medium"
+                : "hover:bg-muted/50 text-muted-foreground"
+            )}
+          >
+            {file.name}
+          </button>
+        ))}
+      </div>
+      {/* Content pane */}
+      <pre className="flex-1 text-xs font-mono overflow-auto bg-terminal rounded p-3 min-h-0">
+        {files.find(f => f.name === selectedFile)?.content ?? ''}
+      </pre>
+    </div>
+  );
+}
+
+function EffectivePromptSection({ agentId }: { agentId: string }) {
+  const query = trpc.getAgentPrompt.useQuery({ id: agentId });
+
+  if (query.isLoading) {
+    return <Skeleton variant="rect" className="h-32 w-full" />;
+  }
+
+  if (query.isError) {
+    return (
+      <div className="space-y-2">
+        <p className="text-sm text-destructive">{query.error.message}</p>
+        <Button variant="outline" size="sm" onClick={() => void query.refetch()}>Retry</Button>
+      </div>
+    );
+  }
+
+  const data = query.data;
+  if (!data) return null;
+
+  if (data.reason === 'prompt_not_written') {
+    return <p className="text-sm text-muted-foreground">Prompt file not available — agent may have been spawned before this feature was added</p>;
+  }
+
+  if (data.content) {
+    return (
+      <pre className="text-xs font-mono overflow-y-auto max-h-[400px] bg-terminal rounded p-3 whitespace-pre-wrap">
+        {data.content}
+      </pre>
+    );
+  }
+
+  return null;
+}

apps/web/src/routes/agents.tsx

@@ -1,4 +1,4 @@
-import { useState } from "react";
+import { useState, useEffect } from "react";
 import { createFileRoute, useNavigate, useSearch } from "@tanstack/react-router";
 import { motion } from "motion/react";
 import { AlertCircle, RefreshCw, Terminal, Users } from "lucide-react";
@@ -9,8 +9,9 @@ import { Skeleton } from "@/components/Skeleton";
 import { toast } from "sonner";
 import { trpc } from "@/lib/trpc";
 import { AgentOutputViewer } from "@/components/AgentOutputViewer";
+import { AgentDetailsPanel } from "@/components/AgentDetailsPanel";
 import { AgentActions } from "@/components/AgentActions";
-import { formatRelativeTime } from "@/lib/utils";
+import { formatRelativeTime, cn } from "@/lib/utils";
 import { modeLabel } from "@/lib/labels";
 import { StatusDot } from "@/components/StatusDot";
 import { useLiveUpdates } from "@/hooks";
@@ -29,7 +30,12 @@ export const Route = createFileRoute("/agents")({
 
 function AgentsPage() {
   const [selectedAgentId, setSelectedAgentId] = useState<string | null>(null);
+  const [activeTab, setActiveTab] = useState<'output' | 'details'>('output');
   const { filter } = useSearch({ from: "/agents" });
+
+  useEffect(() => {
+    setActiveTab('output');
+  }, [selectedAgentId]);
   const navigate = useNavigate();
 
   // Live updates
@@ -308,15 +314,49 @@ function AgentsPage() {
           )}
         </div>
 
-        {/* Right: Output Viewer */}
+        {/* Right: Output/Details Viewer */}
         <div className="min-h-0 overflow-hidden">
           {selectedAgent ? (
-            <AgentOutputViewer
-              agentId={selectedAgent.id}
-              agentName={selectedAgent.name}
-              status={selectedAgent.status}
-              onStop={handleStop}
-            />
+            <div className="flex flex-col min-h-0 h-full">
+              {/* Tab bar */}
+              <div className="flex shrink-0 border-b border-terminal-border">
+                <button
+                  className={cn(
+                    "px-4 py-2 text-sm font-medium",
+                    activeTab === 'output'
+                      ? "border-b-2 border-primary text-foreground"
+                      : "text-muted-foreground hover:text-foreground"
+                  )}
+                  onClick={() => setActiveTab('output')}
+                >
+                  Output
+                </button>
+                <button
+                  className={cn(
+                    "px-4 py-2 text-sm font-medium",
+                    activeTab === 'details'
+                      ? "border-b-2 border-primary text-foreground"
+                      : "text-muted-foreground hover:text-foreground"
+                  )}
+                  onClick={() => setActiveTab('details')}
+                >
+                  Details
+                </button>
+              </div>
+              {/* Panel content */}
+              <div className="flex-1 min-h-0 overflow-hidden">
+                {activeTab === 'output' ? (
+                  <AgentOutputViewer
+                    agentId={selectedAgent.id}
+                    agentName={selectedAgent.name}
+                    status={selectedAgent.status}
+                    onStop={handleStop}
+                  />
+                ) : (
+                  <AgentDetailsPanel agentId={selectedAgent.id} />
+                )}
+              </div>
+            </div>
           ) : (
             <div className="flex h-full flex-col items-center justify-center gap-3 rounded-lg border border-dashed">
               <Terminal className="h-10 w-10 text-muted-foreground/30" />

docs/database.md

@@ -72,6 +72,7 @@ All adapters use nanoid() for IDs, auto-manage timestamps, and use Drizzle's `.r
 | mode | text enum | 'execute' \| 'discuss' \| 'plan' \| 'detail' \| 'refine' |
 | pid | integer nullable | OS process ID |
 | exitCode | integer nullable | |
+| prompt | text nullable | Full assembled prompt passed to agent at spawn; persisted for durability after log cleanup |
 | outputFilePath | text nullable | |
 | result | text nullable | JSON |
 | pendingQuestions | text nullable | JSON |

docs/frontend.md

@@ -44,6 +44,7 @@ Use `mapEntityStatus(rawStatus)` from `StatusDot.tsx` to convert raw entity stat
 |-------|-----------|---------|
 | `/` | `routes/index.tsx` | Dashboard / initiative list |
 | `/initiatives/$id` | `routes/initiatives/$initiativeId.tsx` | Initiative detail (tabbed) |
+| `/agents` | `routes/agents.tsx` | Agent list with Output / Details tab panel |
 | `/settings` | `routes/settings/index.tsx` | Settings page |
 
 ## Initiative Detail Tabs
@@ -54,7 +55,7 @@ The initiative detail page has three tabs managed via local state (not URL param
 2. **Execution Tab** — Pipeline visualization, phase management, task dispatch
 3. **Review Tab** — Pending proposals from agents
 
-## Component Inventory (73 components)
+## Component Inventory (74 components)
 
 ### Core Components (`src/components/`)
 | Component | Purpose |
@@ -66,6 +67,7 @@ The initiative detail page has three tabs managed via local state (not URL param
 | `StatusBadge` | Colored badge using status tokens |
 | `TaskRow` | Task list item with status, priority, category |
 | `QuestionForm` | Agent question form with options |
+| `AgentDetailsPanel` | Details tab for agent right-panel: metadata, input files, effective prompt |
 | `InboxDetailPanel` | Agent message detail + response form |
 | `ProjectPicker` | Checkbox list for project selection |
 | `RegisterProjectDialog` | Dialog to register new git project |

docs/server-api.md

@@ -59,11 +59,13 @@ Each procedure uses `require*Repository(ctx)` helpers that throw `TRPCError(INTE
 | dismissAgent | mutation | Dismiss agent (set userDismissedAt) |
 | resumeAgent | mutation | Resume with answers |
 | listAgents | query | All agents |
-| getAgent | query | Single agent by name or ID |
+| getAgent | query | Single agent by name or ID; also returns `taskName`, `initiativeName`, `exitCode` |
 | getAgentResult | query | Execution result |
 | getAgentQuestions | query | Pending questions |
 | getAgentOutput | query | Timestamped log chunks from DB (`{ content, createdAt }[]`) |
 | getTaskAgent | query | Most recent agent assigned to a task (by taskId) |
+| getAgentInputFiles | query | Files written to agent's `.cw/input/` dir (text only, sorted, 500 KB cap) |
+| getAgentPrompt | query | Assembled prompt — reads from DB (`agents.prompt`) first; falls back to `.cw/agent-logs/<name>/PROMPT.md` for pre-persistence agents (1 MB cap) |
 | getActiveRefineAgent | query | Active refine agent for initiative |
 | getActiveConflictAgent | query | Active conflict resolution agent for initiative (name starts with `conflict-`) |
 | listWaitingAgents | query | Agents waiting for input |