feat: add session-scoped workflow approval gate commands

README.md

@@ -471,6 +471,9 @@ Notes:
 | `/local` | Switch to local model |
 | `/cloud` | Switch to cloud model |
 | `/model` | Show model info and options |
+| `/approvals` | List pending approval gates for current session |
+| `/approve [id]` | Approve latest (or specific) pending gate |
+| `/deny [id] [reason]` | Deny latest (or specific) pending gate |
 
 ## Web UI Dashboard
 
@@ -518,6 +521,9 @@ pnpm tui:fs
 | `/pair` | Generate/list/revoke DM pairing codes |
 | `/fullscreen` | Switch to fullscreen mode |
 | `/transfer <dest>` | Transfer session to another frontend (`telegram` or `tui`) |
+| `/approvals` | List pending approval gates for current session |
+| `/approve [id]` | Approve latest (or specific) pending gate |
+| `/deny [id] [reason]` | Deny latest (or specific) pending gate |
 | `/quit` | Exit |
 
 #### Runtime Model Switching

docs/plans/state.json

@@ -5283,6 +5283,28 @@
         "docs/plans/state.json"
       ],
       "test_status": "pnpm test:run src/models/rotating.test.ts src/daemon/clientFactory.test.ts src/config/schema.test.ts + pnpm typecheck passing"
+    },
+    "workflow-approval-gates-tier-b2": {
+      "status": "completed",
+      "date": "2026-02-18",
+      "updated": "2026-02-18",
+      "summary": "Implemented cross-channel workflow approval gates with session-scoped pending confirmations and explicit `/approvals`, `/approve`, `/deny` commands. HookEngine now stores request context (session/channel/sender), ToolExecutor propagates context for confirm hooks, and router command fast-path can list/resolve approvals for the active session.",
+      "files_modified": [
+        "src/hooks/types.ts",
+        "src/hooks/engine.ts",
+        "src/hooks/engine.test.ts",
+        "src/tools/executor.ts",
+        "src/commands/types.ts",
+        "src/commands/builtin/index.ts",
+        "src/commands/builtin/index.test.ts",
+        "src/commands/index.ts",
+        "src/daemon/routing.ts",
+        "src/daemon/routing.test.ts",
+        "src/daemon/index.ts",
+        "README.md",
+        "docs/plans/state.json"
+      ],
+      "test_status": "pnpm test:run src/hooks/engine.test.ts src/commands/builtin/index.test.ts src/daemon/routing.test.ts src/tools/executor.test.ts + pnpm typecheck passing"
     }
   },
   "overall_progress": {
@@ -5306,7 +5328,7 @@
     "gmail_auth_cli": "flynn gmail-auth command implemented with OAuth2 flow, doctor check, config routed to Telegram",
     "native_audio_support": "completed — smart routing for native audio (Gemini/OpenAI/GitHub) vs Whisper transcription fallback",
     "remaining_phases_completion": "Phase 1: 3/3 (100%) — context levels, command registry, memory structure. Phase 2: 3/3 (100%) — component registry, confidence routing, history index. Phase 3: 2/2 (100%) — adaptive memory/compaction, truthfulness/autonomy hardening",
-    "next_up": "Implement Tier B2 workflow approval gates (await-approval pattern across channels)"
+    "next_up": "Implement Tier B4 skill discovery index (registry-backed search/install flow)"
   },
   "soul_md_and_cron_create": {
     "date": "2026-02-11",

src/commands/builtin/index.test.ts

@@ -1,6 +1,6 @@
 import { describe, it, expect, vi } from 'vitest';
 
-import { createContextCommand, createElevateCommand, createModelCommand, createQueueCommand, createResearchCommand, createTransferCommand } from './index.js';
+import { createApproveCommand, createApprovalsCommand, createContextCommand, createDenyCommand, createElevateCommand, createModelCommand, createQueueCommand, createResearchCommand, createTransferCommand } from './index.js';
 
 describe('builtin /model command', () => {
   it('passes through the full argument string', async () => {
@@ -197,3 +197,47 @@ describe('builtin /transfer command', () => {
     expect(result).toEqual({ handled: true, text: 'Transfer command is not available in this session.' });
   });
 });
+
+describe('builtin approval commands', () => {
+  it('calls getApprovals for /approvals', async () => {
+    const cmd = createApprovalsCommand();
+    const getApprovals = vi.fn(() => '1 pending');
+    const result = await cmd.execute([], {
+      channel: 'test',
+      senderId: 'user',
+      sessionId: 's1',
+      rawInput: '/approvals',
+      services: { getApprovals },
+    });
+    expect(getApprovals).toHaveBeenCalledOnce();
+    expect(result).toEqual({ handled: true, text: '1 pending' });
+  });
+
+  it('passes raw input to approvePending for /approve', async () => {
+    const cmd = createApproveCommand();
+    const approvePending = vi.fn(() => 'approved');
+    const result = await cmd.execute(['abc-123'], {
+      channel: 'test',
+      senderId: 'user',
+      sessionId: 's1',
+      rawInput: '/approve abc-123',
+      services: { approvePending },
+    });
+    expect(approvePending).toHaveBeenCalledWith('abc-123');
+    expect(result).toEqual({ handled: true, text: 'approved' });
+  });
+
+  it('passes raw input to denyPending for /deny', async () => {
+    const cmd = createDenyCommand();
+    const denyPending = vi.fn(() => 'denied');
+    const result = await cmd.execute(['abc-123', 'too', 'risky'], {
+      channel: 'test',
+      senderId: 'user',
+      sessionId: 's1',
+      rawInput: '/deny abc-123 too risky',
+      services: { denyPending },
+    });
+    expect(denyPending).toHaveBeenCalledWith('abc-123 too risky');
+    expect(result).toEqual({ handled: true, text: 'denied' });
+  });
+});

src/commands/builtin/index.ts

@@ -236,6 +236,54 @@ export function createTransferCommand(): CommandDefinition {
   };
 }
 
+export function createApprovalsCommand(): CommandDefinition {
+  return {
+    name: 'approvals',
+    description: 'Show pending approval gates for this session',
+    execute: async (_args, ctx) => {
+      if (!ctx.services?.getApprovals) {
+        return notAvailable('Approvals command');
+      }
+      return {
+        handled: true,
+        text: await ctx.services.getApprovals(),
+      };
+    },
+  };
+}
+
+export function createApproveCommand(): CommandDefinition {
+  return {
+    name: 'approve',
+    description: 'Approve a pending gate (latest by default, or by id)',
+    execute: async (args, ctx) => {
+      if (!ctx.services?.approvePending) {
+        return notAvailable('Approve command');
+      }
+      return {
+        handled: true,
+        text: await ctx.services.approvePending(args.join(' ').trim()),
+      };
+    },
+  };
+}
+
+export function createDenyCommand(): CommandDefinition {
+  return {
+    name: 'deny',
+    description: 'Deny a pending gate (latest by default, optional id and reason)',
+    execute: async (args, ctx) => {
+      if (!ctx.services?.denyPending) {
+        return notAvailable('Deny command');
+      }
+      return {
+        handled: true,
+        text: await ctx.services.denyPending(args.join(' ').trim()),
+      };
+    },
+  };
+}
+
 export function registerBuiltinCommands(registry: CommandRegistry): void {
   registry.register(createHelpCommand(registry));
   registry.register(createStatusCommand());
@@ -248,4 +296,7 @@ export function registerBuiltinCommands(registry: CommandRegistry): void {
   registry.register(createElevateCommand());
   registry.register(createQueueCommand());
   registry.register(createTransferCommand());
+  registry.register(createApprovalsCommand());
+  registry.register(createApproveCommand());
+  registry.register(createDenyCommand());
 }

src/commands/index.ts

@@ -10,5 +10,8 @@ export {
   createResetCommand,
   createQueueCommand,
   createTransferCommand,
+  createApprovalsCommand,
+  createApproveCommand,
+  createDenyCommand,
   registerBuiltinCommands,
 } from './builtin/index.js';

src/commands/types.ts

@@ -35,4 +35,7 @@ export interface CommandServices {
   setQueue?: (input: string) => Promise<string> | string;
   resetQueue?: () => Promise<string> | string;
   transferSession?: (target: string) => Promise<string> | string;
+  getApprovals?: () => Promise<string> | string;
+  approvePending?: (input: string) => Promise<string> | string;
+  denyPending?: (input: string) => Promise<string> | string;
 }

src/daemon/index.ts

@@ -213,7 +213,7 @@ export async function startDaemon(config: Config, options?: StartDaemonOptions):
 
   const messageRouter = createMessageRouter({
     sessionManager, modelRouter, systemPrompt, toolRegistry, toolExecutor,
-    config, memoryStore, agentConfigRegistry, agentRouter, sandboxManager, commandRegistry, intentRegistry, routingPolicy, skillRegistry,
+    config, memoryStore, agentConfigRegistry, agentRouter, sandboxManager, commandRegistry, hookEngine, intentRegistry, routingPolicy, skillRegistry,
     ...createConfiguredExternalBackends(config),
   });
   channelRegistry.setMessageHandler(messageRouter.handler);

src/daemon/routing.test.ts

@@ -1,6 +1,7 @@
 import { describe, it, expect, vi, afterEach } from 'vitest';
 import { AgentRouter } from '../agents/router.js';
 import { AgentConfigRegistry } from '../agents/registry.js';
+import { HookEngine } from '../hooks/index.js';
 import type { ModelTier } from '../models/router.js';
 import { createMessageRouter } from './routing.js';
 import { AgentOrchestrator } from '../backends/index.js';
@@ -817,6 +818,99 @@ describe('daemon command fast-path integration', () => {
     const outbound = reply.mock.calls[0]?.[0] as OutboundMessage | undefined;
     expect(outbound?.text).toContain('Backend: codex');
   });
+
+  it('lists and resolves pending approvals for the current session via /approvals + /approve', async () => {
+    const processSpy = vi.spyOn(AgentOrchestrator.prototype, 'process');
+    const session = {
+      id: 'telegram:approvals-user',
+      addMessage: vi.fn(),
+      getHistory: vi.fn(() => []),
+      clear: vi.fn(),
+      replaceHistory: vi.fn(),
+      getConfig: vi.fn(() => undefined),
+      setConfig: vi.fn(),
+      deleteConfig: vi.fn(),
+    };
+
+    const hookEngine = new HookEngine({ confirm: [], log: [], silent: [] });
+    const pendingPromise = hookEngine.requestConfirmation(
+      'shell.exec',
+      { command: 'rm -rf /tmp/example' },
+      { sessionId: session.id, channel: 'telegram', sender: 'approvals-user' },
+    );
+    const pending = hookEngine.getPendingConfirmations({ sessionId: session.id });
+    const pendingId = pending[0]?.id;
+    if (!pendingId) {
+      throw new Error('Expected pending approval id');
+    }
+
+    const commandRegistry = new CommandRegistry();
+    registerBuiltinCommands(commandRegistry);
+
+    const router = createMessageRouter({
+      sessionManager: {
+        getSession: vi.fn(() => session),
+      } as unknown as MessageRouterDeps['sessionManager'],
+      modelRouter: {
+        getAvailableTiers: () => ['fast', 'default', 'complex', 'local'],
+        getAllLabels: () => ({ fast: 'fast', default: 'default', complex: 'complex', local: 'local' }),
+        getLabel: (tier: string) => tier,
+      } as unknown as MessageRouterDeps['modelRouter'],
+      systemPrompt: 'test prompt',
+      toolRegistry: {
+        clone() { return this; },
+        register: vi.fn(),
+      } as unknown as MessageRouterDeps['toolRegistry'],
+      toolExecutor: {} as unknown as MessageRouterDeps['toolExecutor'],
+      config: {
+        agents: {
+          primary_tier: 'default',
+          delegation: {
+            compaction: 'fast',
+            memory_extraction: 'fast',
+            classification: 'fast',
+            tool_summarisation: 'fast',
+            complex_reasoning: 'complex',
+          },
+          max_delegation_depth: 3,
+          max_iterations: 10,
+        },
+        compaction: { enabled: false },
+        models: { default: { provider: 'anthropic', model: 'claude' } },
+      } as unknown as MessageRouterDeps['config'],
+      commandRegistry,
+      hookEngine,
+    });
+
+    const reply = vi.fn(async (_message: OutboundMessage) => {});
+
+    await router.handler({
+      id: 'approvals-1',
+      channel: 'telegram',
+      senderId: 'approvals-user',
+      text: '/approvals',
+      timestamp: Date.now(),
+      metadata: { isCommand: true, command: 'approvals' },
+    } as MessageRouterInput, reply);
+
+    const listReply = reply.mock.calls[0]?.[0] as OutboundMessage | undefined;
+    expect(String(listReply?.text)).toContain('Pending approvals:');
+    expect(String(listReply?.text)).toContain(pendingId);
+
+    await router.handler({
+      id: 'approvals-2',
+      channel: 'telegram',
+      senderId: 'approvals-user',
+      text: `/approve ${pendingId}`,
+      timestamp: Date.now(),
+      metadata: { isCommand: true, command: 'approve', commandArgs: pendingId },
+    } as MessageRouterInput, reply);
+
+    const approveReply = reply.mock.calls[1]?.[0] as OutboundMessage | undefined;
+    expect(String(approveReply?.text)).toContain('Approved: shell.exec');
+    await expect(pendingPromise).resolves.toEqual({ approved: true });
+    expect(processSpy).not.toHaveBeenCalled();
+  });
 });
 
 describe('daemon external backend integration', () => {

src/daemon/routing.ts

@@ -20,6 +20,7 @@ import { AgentConfigRegistry, AgentRouter } from '../agents/index.js';
 import type { CommandRegistry } from '../commands/index.js';
 import type { ComponentRegistry } from '../intents/index.js';
 import type { RoutingPolicy } from '../routing/index.js';
+import type { HookEngine } from '../hooks/index.js';
 import { createClientFromConfig } from './models.js';
 import { matchReactionPrompt } from '../automation/reactions.js';
 import type { SkillRegistry } from '../skills/index.js';
@@ -116,6 +117,7 @@ export function createMessageRouter(deps: {
   agentRouter?: AgentRouter;
   sandboxManager?: SandboxManager;
   commandRegistry?: CommandRegistry;
+  hookEngine?: HookEngine;
   intentRegistry?: ComponentRegistry;
   routingPolicy?: RoutingPolicy;
   skillRegistry?: SkillRegistry;
@@ -936,6 +938,86 @@ export function createMessageRouter(deps: {
             deps.sessionManager.transferSession(msg.channel, msg.senderId, toFrontend, toUserId);
             return `Session transferred to ${destinationLabel}`;
           },
+
+          getApprovals: () => {
+            if (!deps.hookEngine) {
+              return 'Approval gates are not enabled in this runtime.';
+            }
+            const pending = deps.hookEngine.getPendingConfirmations({ sessionId: session.id });
+            if (pending.length === 0) {
+              return 'No pending approvals for this session.';
+            }
+            const lines = ['Pending approvals:'];
+            for (const item of pending) {
+              const ageSec = Math.max(0, Math.round((Date.now() - item.createdAt.getTime()) / 1000));
+              lines.push(`- ${item.id} | ${item.tool} | ${ageSec}s old`);
+            }
+            lines.push('');
+            lines.push('Use `/approve <id>` or `/deny <id> <reason>` (id optional: latest is used).');
+            return lines.join('\n');
+          },
+
+          approvePending: (inputRaw: string) => {
+            if (!deps.hookEngine) {
+              return 'Approval gates are not enabled in this runtime.';
+            }
+            const pending = deps.hookEngine.getPendingConfirmations({ sessionId: session.id });
+            if (pending.length === 0) {
+              return 'No pending approvals for this session.';
+            }
+
+            const input = inputRaw.trim();
+            const selected = input
+              ? pending.find((item) => item.id === input)
+              : pending[pending.length - 1];
+
+            if (!selected) {
+              return `Approval id not found in this session: ${input}`;
+            }
+
+            const resolved = deps.hookEngine.resolveConfirmation(selected.id, { approved: true });
+            return resolved
+              ? `Approved: ${selected.tool} (${selected.id})`
+              : `Approval request is no longer pending: ${selected.id}`;
+          },
+
+          denyPending: (inputRaw: string) => {
+            if (!deps.hookEngine) {
+              return 'Approval gates are not enabled in this runtime.';
+            }
+            const pending = deps.hookEngine.getPendingConfirmations({ sessionId: session.id });
+            if (pending.length === 0) {
+              return 'No pending approvals for this session.';
+            }
+
+            const input = inputRaw.trim();
+            let targetId: string | undefined;
+            let reason = 'Denied by user';
+
+            if (input) {
+              const [first, ...rest] = input.split(/\s+/);
+              const matched = pending.find((item) => item.id === first);
+              if (matched) {
+                targetId = matched.id;
+                reason = rest.join(' ').trim() || reason;
+              } else {
+                targetId = pending[pending.length - 1].id;
+                reason = input;
+              }
+            } else {
+              targetId = pending[pending.length - 1].id;
+            }
+
+            const selected = pending.find((item) => item.id === targetId);
+            if (!selected) {
+              return `Approval request is no longer pending: ${targetId}`;
+            }
+
+            const resolved = deps.hookEngine.resolveConfirmation(selected.id, { approved: false, reason });
+            return resolved
+              ? `Denied: ${selected.tool} (${selected.id}) — ${reason}`
+              : `Approval request is no longer pending: ${selected.id}`;
+          },
         },
       });
 

src/hooks/engine.test.ts

@@ -87,4 +87,32 @@ describe('HookEngine', () => {
       args: { cmd: 'ls' },
     }));
   });
+
+  it('stores request context and supports filtered pending lookups', async () => {
+    const engine = new HookEngine({ confirm: ['shell.*'], log: [], silent: [] });
+    const p1 = engine.requestConfirmation(
+      'shell.exec',
+      { cmd: 'ls' },
+      { sessionId: 'telegram:1', channel: 'telegram', sender: '1' },
+    );
+    const p2 = engine.requestConfirmation(
+      'shell.exec',
+      { cmd: 'pwd' },
+      { sessionId: 'discord:2', channel: 'discord', sender: '2' },
+    );
+
+    const telegramPending = engine.getPendingConfirmations({ sessionId: 'telegram:1' });
+    expect(telegramPending).toHaveLength(1);
+    expect(telegramPending[0].channel).toBe('telegram');
+    expect(telegramPending[0].sender).toBe('1');
+
+    const discordPending = engine.getPendingConfirmations({ channel: 'discord' });
+    expect(discordPending).toHaveLength(1);
+    expect(discordPending[0].sessionId).toBe('discord:2');
+
+    engine.resolveConfirmation(telegramPending[0].id, { approved: true });
+    engine.resolveConfirmation(discordPending[0].id, { approved: false, reason: 'Denied' });
+    await expect(p1).resolves.toEqual({ approved: true });
+    await expect(p2).resolves.toEqual({ approved: false, reason: 'Denied' });
+  });
 });

src/hooks/engine.ts

@@ -44,7 +44,11 @@ export class HookEngine {
     return 'silent';
   }
 
-  async requestConfirmation(tool: string, args: Record<string, unknown>): Promise<HookResult> {
+  async requestConfirmation(
+    tool: string,
+    args: Record<string, unknown>,
+    context?: { sessionId?: string; channel?: string; sender?: string },
+  ): Promise<HookResult> {
     const id = randomUUID();
 
     if (this.interactiveConfirmer) {
@@ -56,6 +60,9 @@ export class HookEngine {
         id,
         tool,
         args,
+        sessionId: context?.sessionId,
+        channel: context?.channel,
+        sender: context?.sender,
         resolve,
         createdAt: new Date(),
       };
@@ -74,8 +81,23 @@ export class HookEngine {
     return true;
   }
 
-  getPendingConfirmations(): PendingConfirmation[] {
+  getPendingConfirmations(filter?: { sessionId?: string; channel?: string; sender?: string }): PendingConfirmation[] {
-    return Array.from(this.pendingConfirmations.values());
+    const pending = Array.from(this.pendingConfirmations.values());
+    if (!filter) {
+      return pending;
+    }
+    return pending.filter((item) => {
+      if (filter.sessionId && item.sessionId !== filter.sessionId) {
+        return false;
+      }
+      if (filter.channel && item.channel !== filter.channel) {
+        return false;
+      }
+      if (filter.sender && item.sender !== filter.sender) {
+        return false;
+      }
+      return true;
+    });
   }
 
   clearExpiredConfirmations(maxAgeMs: number = 5 * 60 * 1000): number {

src/hooks/types.ts

@@ -9,6 +9,9 @@ export interface PendingConfirmation {
   id: string;
   tool: string;
   args: Record<string, unknown>;
+  sessionId?: string;
+  channel?: string;
+  sender?: string;
   resolve: (result: HookResult) => void;
   createdAt: Date;
 }

src/tools/executor.ts

@@ -221,6 +221,11 @@ export class ToolExecutor {
       const hookResult = await this.hooks.requestConfirmation(
         toolName,
         args as Record<string, unknown>,
+        {
+          sessionId: context?.sessionId,
+          channel: context?.channel,
+          sender: context?.sender,
+        },
       );
 
       auditLogger?.toolApproval({