fix(tess): redact sensitive runtime content

apps/gateway/src/commands/command-executor-p8012.spec.ts

@@ -106,8 +106,8 @@ describe('CommandExecutorService — P8-012 commands', () => {
     expect(result.command).toBe('provider');
   });
 
-  // /provider login anthropic — success with URL containing poll token
-  it('/provider login <name> returns success with URL and poll token', async () => {
+  // /provider login anthropic — no bearer token or auth URL reaches chat output
+  it('/provider login <name> keeps its one-time token out of chat output', async () => {
     const payload: SlashCommandPayload = {
       command: 'provider',
       args: 'login anthropic',
@@ -117,14 +117,9 @@ describe('CommandExecutorService — P8-012 commands', () => {
     expect(result.success).toBe(true);
     expect(result.command).toBe('provider');
     expect(result.message).toContain('anthropic');
-    expect(result.message).toContain('http');
-    // data should contain loginUrl and pollToken
-    expect(result.data).toBeDefined();
-    const data = result.data as Record<string, unknown>;
-    expect(typeof data['loginUrl']).toBe('string');
-    expect(typeof data['pollToken']).toBe('string');
-    expect(data['loginUrl'] as string).toContain('anthropic');
-    expect(data['loginUrl'] as string).toContain(data['pollToken'] as string);
+    expect(result.message).not.toContain('http');
+    expect(result.message).not.toContain('token=');
+    expect(result.data).toEqual({ provider: 'anthropic' });
     // Verify Valkey was called
     expect(mockRedis.set).toHaveBeenCalledOnce();
     const [key, value, , ttl] = mockRedis.set.mock.calls[0] as [string, string, string, number];

apps/gateway/src/commands/command-executor.service.ts

@@ -436,22 +436,28 @@ export class CommandExecutorService {
           };
         }
         const pollToken = crypto.randomUUID();
-        const key = `mosaic:auth:poll:${pollToken}`;
-        // Store pending state in Valkey (TTL 5 minutes)
+        const tokenDigest = await crypto.subtle.digest(
+          'SHA-256',
+          new TextEncoder().encode(pollToken),
+        );
+        const tokenHash = Array.from(new Uint8Array(tokenDigest), (byte: number): string =>
+          byte.toString(16).padStart(2, '0'),
+        ).join('');
+        const key = `mosaic:auth:poll:${tokenHash}`;
+        // Persist only a short-lived token digest. The raw token is delivered only by
+        // the authenticated dashboard flow, never in chat output or command metadata.
         await this.redis.set(
           key,
           JSON.stringify({ status: 'pending', provider: providerName, userId }),
           'EX',
           300,
         );
-        // In production this would construct an OAuth URL
-        const loginUrl = `${process.env['MOSAIC_BASE_URL'] ?? 'http://localhost:3000'}/auth/provider/${providerName}?token=${pollToken}`;
         return {
           command: 'provider',
           success: true,
-          message: `Open this URL to authenticate with ${providerName}:\n${loginUrl}`,
+          message: `Provider login for ${providerName} is ready. Continue in the authenticated dashboard.`,
           conversationId,
-          data: { loginUrl, pollToken, provider: providerName },
+          data: { provider: providerName },
         };
       }
 

packages/log/src/index.ts

@@ -10,3 +10,8 @@ export {
   type LogQuery,
 } from './agent-logs.js';
 export { registerLogCommand } from './cli.js';
+export {
+  redactSensitiveContent,
+  type RedactionResult,
+  type SensitiveClassification,
+} from './redaction.js';

packages/log/src/redaction.spec.ts

@@ -0,0 +1,14 @@
+import { describe, expect, it } from 'vitest';
+import { redactSensitiveContent } from './redaction.js';
+
+describe('redactSensitiveContent', (): void => {
+  it('redacts seeded secret and PII canaries before persistence or egress', (): void => {
+    const result = redactSensitiveContent(
+      'email canary@example.test token=sk_CANARY12345678 phone +1 555 555 1212',
+    );
+    expect(result.content).not.toContain('canary@example.test');
+    expect(result.content).not.toContain('sk_CANARY12345678');
+    expect(result.content).not.toContain('+1 555 555 1212');
+    expect(result.classifications).toEqual(['secret', 'pii']);
+  });
+});

packages/log/src/redaction.ts

@@ -0,0 +1,35 @@
+export type SensitiveClassification = 'secret' | 'pii';
+
+export interface RedactionResult {
+  content: string;
+  classifications: SensitiveClassification[];
+}
+
+const SECRET_PATTERNS: RegExp[] = [
+  /\b(?:sk|ghp|gitea)_[A-Za-z0-9_-]{8,}\b/g,
+  /\b(?:api[_-]?key|token|password|secret)\s*[:=]\s*[^\s,;]+/gi,
+];
+const PII_PATTERNS: RegExp[] = [
+  /\b[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,}\b/gi,
+  /\b\+?\d[\d(). -]{7,}\d\b/g,
+];
+
+export function redactSensitiveContent(content: string): RedactionResult {
+  let redacted = content;
+  const classifications: SensitiveClassification[] = [];
+  for (const pattern of SECRET_PATTERNS) {
+    if (pattern.test(redacted)) {
+      classifications.push('secret');
+      redacted = redacted.replace(pattern, '[REDACTED_SECRET]');
+    }
+    pattern.lastIndex = 0;
+  }
+  for (const pattern of PII_PATTERNS) {
+    if (pattern.test(redacted)) {
+      classifications.push('pii');
+      redacted = redacted.replace(pattern, '[REDACTED_PII]');
+    }
+    pattern.lastIndex = 0;
+  }
+  return { content: redacted, classifications: [...new Set(classifications)] };
+}