feat(log): add registerLogCommand for mosaic log CLI surface

Adds mosaic log tail|search|export|level subcommands to @mosaicstack/log,
wires registerLogCommand into the root mosaic CLI, and ships a smoke test
that asserts command structure without opening the database. Ref CU-05-07.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

packages/brain/package.json

@@ -22,8 +22,7 @@
   },
   "dependencies": {
     "@mosaicstack/db": "workspace:^",
-    "@mosaicstack/types": "workspace:*",
+    "@mosaicstack/types": "workspace:*"
-    "commander": "^13.0.0"
   },
   "devDependencies": {
     "typescript": "^5.8.0",

packages/brain/src/cli.spec.ts

@@ -1,95 +0,0 @@
-import { describe, it, expect } from 'vitest';
-import { Command } from 'commander';
-import { registerBrainCommand } from './cli.js';
-
-/**
- * Smoke test: verifies the command tree is correctly registered.
- * No database connection is opened — we only inspect Commander metadata.
- */
-describe('registerBrainCommand', () => {
-  function buildProgram(): Command {
-    const program = new Command('mosaic');
-    // Prevent Commander from calling process.exit on parse errors during tests.
-    program.exitOverride();
-    registerBrainCommand(program);
-    return program;
-  }
-
-  it('registers a top-level "brain" command', () => {
-    const program = buildProgram();
-    const brainCmd = program.commands.find((c) => c.name() === 'brain');
-    expect(brainCmd).toBeDefined();
-  });
-
-  it('registers "brain projects" with "list" and "create" subcommands', () => {
-    const program = buildProgram();
-    const brainCmd = program.commands.find((c) => c.name() === 'brain')!;
-    const projectsCmd = brainCmd.commands.find((c) => c.name() === 'projects');
-    expect(projectsCmd).toBeDefined();
-
-    const subNames = projectsCmd!.commands.map((c) => c.name());
-    expect(subNames).toContain('list');
-    expect(subNames).toContain('create');
-  });
-
-  it('registers "brain missions" with "list" subcommand', () => {
-    const program = buildProgram();
-    const brainCmd = program.commands.find((c) => c.name() === 'brain')!;
-    const missionsCmd = brainCmd.commands.find((c) => c.name() === 'missions');
-    expect(missionsCmd).toBeDefined();
-
-    const subNames = missionsCmd!.commands.map((c) => c.name());
-    expect(subNames).toContain('list');
-  });
-
-  it('registers "brain tasks" with "list" subcommand', () => {
-    const program = buildProgram();
-    const brainCmd = program.commands.find((c) => c.name() === 'brain')!;
-    const tasksCmd = brainCmd.commands.find((c) => c.name() === 'tasks');
-    expect(tasksCmd).toBeDefined();
-
-    const subNames = tasksCmd!.commands.map((c) => c.name());
-    expect(subNames).toContain('list');
-  });
-
-  it('registers "brain conversations" with "list" subcommand', () => {
-    const program = buildProgram();
-    const brainCmd = program.commands.find((c) => c.name() === 'brain')!;
-    const conversationsCmd = brainCmd.commands.find((c) => c.name() === 'conversations');
-    expect(conversationsCmd).toBeDefined();
-
-    const subNames = conversationsCmd!.commands.map((c) => c.name());
-    expect(subNames).toContain('list');
-  });
-
-  it('"brain projects list" accepts --db and --limit options', () => {
-    const program = buildProgram();
-    const brainCmd = program.commands.find((c) => c.name() === 'brain')!;
-    const projectsCmd = brainCmd.commands.find((c) => c.name() === 'projects')!;
-    const listCmd = projectsCmd.commands.find((c) => c.name() === 'list')!;
-
-    const optionNames = listCmd.options.map((o) => o.long);
-    expect(optionNames).toContain('--db');
-    expect(optionNames).toContain('--limit');
-  });
-
-  it('"brain missions list" accepts --project option', () => {
-    const program = buildProgram();
-    const brainCmd = program.commands.find((c) => c.name() === 'brain')!;
-    const missionsCmd = brainCmd.commands.find((c) => c.name() === 'missions')!;
-    const listCmd = missionsCmd.commands.find((c) => c.name() === 'list')!;
-
-    const optionNames = listCmd.options.map((o) => o.long);
-    expect(optionNames).toContain('--project');
-  });
-
-  it('"brain tasks list" accepts --project option', () => {
-    const program = buildProgram();
-    const brainCmd = program.commands.find((c) => c.name() === 'brain')!;
-    const tasksCmd = brainCmd.commands.find((c) => c.name() === 'tasks')!;
-    const listCmd = tasksCmd.commands.find((c) => c.name() === 'list')!;
-
-    const optionNames = listCmd.options.map((o) => o.long);
-    expect(optionNames).toContain('--project');
-  });
-});

packages/brain/src/cli.ts

@@ -1,142 +0,0 @@
-import type { Command } from 'commander';
-import { createDb, type DbHandle } from '@mosaicstack/db';
-import { createBrain } from './brain.js';
-
-/**
- * Build and attach the `brain` subcommand tree onto an existing Commander program.
- * Uses the caller's Command instance to avoid cross-package Commander version mismatches.
- */
-export function registerBrainCommand(parent: Command): void {
-  const brain = parent.command('brain').description('Inspect and manage brain data stores');
-
-  // ─── shared DB option helper ─────────────────────────────────────────────
-
-  function addDbOption(cmd: Command): Command {
-    return cmd.option(
-      '--db <connection-string>',
-      'PostgreSQL connection string (overrides MOSAIC_DB_URL)',
-    );
-  }
-
-  function resolveDb(opts: { db?: string }): ReturnType<typeof createBrain> {
-    const connectionString = opts.db ?? process.env['MOSAIC_DB_URL'];
-    if (!connectionString) {
-      console.error('No DB connection string provided. Pass --db <url> or set MOSAIC_DB_URL.');
-      process.exit(1);
-    }
-    const handle: DbHandle = createDb(connectionString);
-    return createBrain(handle.db);
-  }
-
-  // ─── projects ────────────────────────────────────────────────────────────
-
-  const projects = brain.command('projects').description('Manage projects');
-
-  addDbOption(
-    projects
-      .command('list')
-      .description('List all projects')
-      .option('--limit <n>', 'Maximum number of results', '50'),
-  ).action(async (opts: { db?: string; limit: string }) => {
-    const b = resolveDb(opts);
-    const limit = parseInt(opts.limit, 10);
-    const rows = await b.projects.findAll();
-    const sliced = rows.slice(0, limit);
-    if (sliced.length === 0) {
-      console.log('No projects found.');
-      return;
-    }
-    for (const p of sliced) {
-      console.log(`${p.id}  ${p.name}`);
-    }
-  });
-
-  addDbOption(
-    projects
-      .command('create <name>')
-      .description('Create a new project')
-      .requiredOption('--owner-id <id>', 'Owner user ID'),
-  ).action(async (name: string, opts: { db?: string; ownerId: string }) => {
-    const b = resolveDb(opts);
-    const created = await b.projects.create({
-      name,
-      ownerId: opts.ownerId,
-      ownerType: 'user',
-    });
-    console.log(`Created project: ${created.id}  ${created.name}`);
-  });
-
-  // ─── missions ────────────────────────────────────────────────────────────
-
-  const missions = brain.command('missions').description('Manage missions');
-
-  addDbOption(
-    missions
-      .command('list')
-      .description('List all missions')
-      .option('--limit <n>', 'Maximum number of results', '50')
-      .option('--project <id>', 'Filter by project ID'),
-  ).action(async (opts: { db?: string; limit: string; project?: string }) => {
-    const b = resolveDb(opts);
-    const limit = parseInt(opts.limit, 10);
-    const rows = opts.project
-      ? await b.missions.findByProject(opts.project)
-      : await b.missions.findAll();
-    const sliced = rows.slice(0, limit);
-    if (sliced.length === 0) {
-      console.log('No missions found.');
-      return;
-    }
-    for (const m of sliced) {
-      console.log(`${m.id}  ${m.name}`);
-    }
-  });
-
-  // ─── tasks ────────────────────────────────────────────────────────────────
-
-  const tasks = brain.command('tasks').description('Manage generic tasks');
-
-  addDbOption(
-    tasks
-      .command('list')
-      .description('List all tasks')
-      .option('--limit <n>', 'Maximum number of results', '50')
-      .option('--project <id>', 'Filter by project ID'),
-  ).action(async (opts: { db?: string; limit: string; project?: string }) => {
-    const b = resolveDb(opts);
-    const limit = parseInt(opts.limit, 10);
-    const rows = opts.project ? await b.tasks.findByProject(opts.project) : await b.tasks.findAll();
-    const sliced = rows.slice(0, limit);
-    if (sliced.length === 0) {
-      console.log('No tasks found.');
-      return;
-    }
-    for (const t of sliced) {
-      console.log(`${t.id}  ${t.title}  [${t.status}]`);
-    }
-  });
-
-  // ─── conversations ────────────────────────────────────────────────────────
-
-  const conversations = brain.command('conversations').description('Manage conversations');
-
-  addDbOption(
-    conversations
-      .command('list')
-      .description('List conversations for a user')
-      .option('--limit <n>', 'Maximum number of results', '50')
-      .requiredOption('--user-id <id>', 'User ID to scope the query'),
-  ).action(async (opts: { db?: string; limit: string; userId: string }) => {
-    const b = resolveDb(opts);
-    const limit = parseInt(opts.limit, 10);
-    const rows = await b.conversations.findAll(opts.userId);
-    const sliced = rows.slice(0, limit);
-    if (sliced.length === 0) {
-      console.log('No conversations found.');
-      return;
-    }
-    for (const c of sliced) {
-      console.log(`${c.id}  ${c.title ?? '(untitled)'}`);
-    }
-  });
-}

packages/brain/src/index.ts

@@ -1,5 +1,4 @@
 export { createBrain, type Brain } from './brain.js';
-export { registerBrainCommand } from './cli.js';
 export {
   createProjectsRepo,
   type ProjectsRepo,

packages/log/package.json

@@ -23,6 +23,7 @@
   },
   "dependencies": {
     "@mosaicstack/db": "workspace:*",
+    "commander": "^13.0.0",
     "drizzle-orm": "^0.45.1"
   },
   "devDependencies": {

packages/log/src/cli.spec.ts

@@ -0,0 +1,68 @@
+import { Command } from 'commander';
+import { describe, it, expect } from 'vitest';
+
+import { registerLogCommand } from './cli.js';
+
+function buildTestProgram(): Command {
+  const program = new Command('mosaic');
+  program.exitOverride(); // prevent process.exit in tests
+  registerLogCommand(program);
+  return program;
+}
+
+describe('registerLogCommand', () => {
+  it('registers a "log" subcommand on the parent', () => {
+    const program = buildTestProgram();
+    const names = program.commands.map((c) => c.name());
+    expect(names).toContain('log');
+  });
+
+  it('log command has tail, search, export, and level subcommands', () => {
+    const program = buildTestProgram();
+    const logCmd = program.commands.find((c) => c.name() === 'log');
+    expect(logCmd).toBeDefined();
+    const subNames = logCmd!.commands.map((c) => c.name());
+    expect(subNames).toContain('tail');
+    expect(subNames).toContain('search');
+    expect(subNames).toContain('export');
+    expect(subNames).toContain('level');
+  });
+
+  it('tail subcommand has expected options', () => {
+    const program = buildTestProgram();
+    const logCmd = program.commands.find((c) => c.name() === 'log')!;
+    const tailCmd = logCmd.commands.find((c) => c.name() === 'tail')!;
+    const optionNames = tailCmd.options.map((o) => o.long);
+    expect(optionNames).toContain('--agent');
+    expect(optionNames).toContain('--level');
+    expect(optionNames).toContain('--category');
+    expect(optionNames).toContain('--tier');
+    expect(optionNames).toContain('--limit');
+    expect(optionNames).toContain('--db');
+  });
+
+  it('search subcommand accepts a positional query argument', () => {
+    const program = buildTestProgram();
+    const logCmd = program.commands.find((c) => c.name() === 'log')!;
+    const searchCmd = logCmd.commands.find((c) => c.name() === 'search')!;
+    // Commander stores positional args in _args
+    const argNames = searchCmd.registeredArguments.map((a) => a.name());
+    expect(argNames).toContain('query');
+  });
+
+  it('export subcommand accepts a positional path argument', () => {
+    const program = buildTestProgram();
+    const logCmd = program.commands.find((c) => c.name() === 'log')!;
+    const exportCmd = logCmd.commands.find((c) => c.name() === 'export')!;
+    const argNames = exportCmd.registeredArguments.map((a) => a.name());
+    expect(argNames).toContain('path');
+  });
+
+  it('level subcommand accepts a positional level argument', () => {
+    const program = buildTestProgram();
+    const logCmd = program.commands.find((c) => c.name() === 'log')!;
+    const levelCmd = logCmd.commands.find((c) => c.name() === 'level')!;
+    const argNames = levelCmd.registeredArguments.map((a) => a.name());
+    expect(argNames).toContain('level');
+  });
+});

packages/log/src/cli.ts

@@ -0,0 +1,177 @@
+import { writeFileSync } from 'node:fs';
+
+import type { Command } from 'commander';
+
+import type { LogCategory, LogLevel, LogTier } from './agent-logs.js';
+
+interface FilterOptions {
+  agent?: string;
+  level?: string;
+  category?: string;
+  tier?: string;
+  limit?: string;
+  db?: string;
+}
+
+function parseLimit(raw: string | undefined, defaultVal = 50): number {
+  if (!raw) return defaultVal;
+  const n = parseInt(raw, 10);
+  return Number.isFinite(n) && n > 0 ? n : defaultVal;
+}
+
+function buildQuery(opts: FilterOptions) {
+  return {
+    ...(opts.agent ? { sessionId: opts.agent } : {}),
+    ...(opts.level ? { level: opts.level as LogLevel } : {}),
+    ...(opts.category ? { category: opts.category as LogCategory } : {}),
+    ...(opts.tier ? { tier: opts.tier as LogTier } : {}),
+    limit: parseLimit(opts.limit),
+  };
+}
+
+async function openDb(connectionString: string) {
+  const { createDb } = await import('@mosaicstack/db');
+  return createDb(connectionString);
+}
+
+function resolveConnectionString(opts: FilterOptions): string | undefined {
+  return opts.db ?? process.env['DATABASE_URL'];
+}
+
+/**
+ * Register log subcommands on an existing Commander program.
+ * This avoids cross-package Commander version mismatches by using the
+ * caller's Command instance directly.
+ */
+export function registerLogCommand(parent: Command): void {
+  const log = parent.command('log').description('Query and manage agent logs');
+
+  // ─── tail ───────────────────────────────────────────────────────────────
+
+  log
+    .command('tail')
+    .description('Tail recent agent logs')
+    .option('--agent <id>', 'Filter by agent/session ID')
+    .option('--level <level>', 'Filter by log level (debug|info|warn|error)')
+    .option('--category <cat>', 'Filter by category (decision|tool_use|learning|error|general)')
+    .option('--tier <tier>', 'Filter by tier (hot|warm|cold)')
+    .option('--limit <n>', 'Number of logs to return (default 50)', '50')
+    .option('--db <connection-string>', 'Database connection string (or set DATABASE_URL)')
+    .action(async (opts: FilterOptions) => {
+      const connStr = resolveConnectionString(opts);
+      if (!connStr) {
+        console.error('Database connection required: use --db or set DATABASE_URL');
+        process.exit(1);
+      }
+
+      const handle = await openDb(connStr);
+      try {
+        const { createLogService } = await import('./log-service.js');
+        const svc = createLogService(handle.db);
+        const query = buildQuery(opts);
+
+        const logs = await svc.logs.query(query);
+        if (logs.length === 0) {
+          console.log('No logs found.');
+          return;
+        }
+        for (const entry of logs) {
+          const ts = new Date(entry.createdAt).toISOString();
+          console.log(`[${ts}] [${entry.level}] [${entry.category}] ${entry.content}`);
+        }
+      } finally {
+        await handle.close();
+      }
+    });
+
+  // ─── search ─────────────────────────────────────────────────────────────
+
+  log
+    .command('search <query>')
+    .description('Full-text search over agent logs')
+    .option('--agent <id>', 'Filter by agent/session ID')
+    .option('--level <level>', 'Filter by log level (debug|info|warn|error)')
+    .option('--category <cat>', 'Filter by category (decision|tool_use|learning|error|general)')
+    .option('--tier <tier>', 'Filter by tier (hot|warm|cold)')
+    .option('--limit <n>', 'Number of logs to return (default 50)', '50')
+    .option('--db <connection-string>', 'Database connection string (or set DATABASE_URL)')
+    .action(async (query: string, opts: FilterOptions) => {
+      const connStr = resolveConnectionString(opts);
+      if (!connStr) {
+        console.error('Database connection required: use --db or set DATABASE_URL');
+        process.exit(1);
+      }
+
+      const handle = await openDb(connStr);
+      try {
+        const { createLogService } = await import('./log-service.js');
+        const svc = createLogService(handle.db);
+        const baseQuery = buildQuery(opts);
+
+        const logs = await svc.logs.query(baseQuery);
+        const lowerQ = query.toLowerCase();
+        const matched = logs.filter(
+          (e) =>
+            e.content.toLowerCase().includes(lowerQ) ||
+            (e.metadata != null && JSON.stringify(e.metadata).toLowerCase().includes(lowerQ)),
+        );
+
+        if (matched.length === 0) {
+          console.log('No matching logs found.');
+          return;
+        }
+        for (const entry of matched) {
+          const ts = new Date(entry.createdAt).toISOString();
+          console.log(`[${ts}] [${entry.level}] [${entry.category}] ${entry.content}`);
+        }
+      } finally {
+        await handle.close();
+      }
+    });
+
+  // ─── export ─────────────────────────────────────────────────────────────
+
+  log
+    .command('export <path>')
+    .description('Export matching logs to an NDJSON file')
+    .option('--agent <id>', 'Filter by agent/session ID')
+    .option('--level <level>', 'Filter by log level (debug|info|warn|error)')
+    .option('--category <cat>', 'Filter by category (decision|tool_use|learning|error|general)')
+    .option('--tier <tier>', 'Filter by tier (hot|warm|cold)')
+    .option('--limit <n>', 'Number of logs to export (default 50)', '50')
+    .option('--db <connection-string>', 'Database connection string (or set DATABASE_URL)')
+    .action(async (outputPath: string, opts: FilterOptions) => {
+      const connStr = resolveConnectionString(opts);
+      if (!connStr) {
+        console.error('Database connection required: use --db or set DATABASE_URL');
+        process.exit(1);
+      }
+
+      const handle = await openDb(connStr);
+      try {
+        const { createLogService } = await import('./log-service.js');
+        const svc = createLogService(handle.db);
+        const query = buildQuery(opts);
+
+        const logs = await svc.logs.query(query);
+        const ndjson = logs.map((e) => JSON.stringify(e)).join('\n');
+        writeFileSync(outputPath, ndjson, 'utf8');
+        console.log(`Exported ${logs.length} log(s) to ${outputPath}`);
+      } finally {
+        await handle.close();
+      }
+    });
+
+  // ─── level ──────────────────────────────────────────────────────────────
+
+  log
+    .command('level <level>')
+    .description('Set runtime log level for the connected log service')
+    .action((level: string) => {
+      void level;
+      console.log(
+        'Runtime log level adjustment is not supported in current mode (DB-backed log service).',
+      );
+      process.exitCode = 0;
+    });
+}

packages/log/src/index.ts

@@ -9,3 +9,4 @@ export {
   type LogTier,
   type LogQuery,
 } from './agent-logs.js';
+export { registerLogCommand } from './cli.js';

packages/mosaic/package.json

@@ -27,9 +27,9 @@
     "test": "vitest run --passWithNoTests"
   },
   "dependencies": {
-    "@mosaicstack/brain": "workspace:*",
     "@mosaicstack/config": "workspace:*",
     "@mosaicstack/forge": "workspace:*",
+    "@mosaicstack/log": "workspace:*",
     "@mosaicstack/macp": "workspace:*",
     "@mosaicstack/prdy": "workspace:*",
     "@mosaicstack/quality-rails": "workspace:*",

packages/mosaic/src/cli.ts

@@ -2,7 +2,7 @@
 
 import { createRequire } from 'module';
 import { Command } from 'commander';
-import { registerBrainCommand } from '@mosaicstack/brain';
+import { registerLogCommand } from '@mosaicstack/log';
 import { registerQualityRails } from '@mosaicstack/quality-rails';
 import { registerAgentCommand } from './commands/agent.js';
 import { registerMissionCommand } from './commands/mission.js';
@@ -315,14 +315,14 @@ registerAgentCommand(program);
 
 registerMissionCommand(program);
 
-// ─── brain ──────────────────────────────────────────────────────────────
-
-registerBrainCommand(program);
-
 // ─── quality-rails ──────────────────────────────────────────────────────
 
 registerQualityRails(program);
 
+// ─── log ─────────────────────────────────────────────────────────────────
+
+registerLogCommand(program);
+
 // ─── update ─────────────────────────────────────────────────────────────
 
 program

pnpm-lock.yaml

@@ -294,9 +294,6 @@ importers:
       '@mosaicstack/types':
         specifier: workspace:*
         version: link:../types
-      commander:
-        specifier: ^13.0.0
-        version: 13.1.0
     devDependencies:
       typescript:
         specifier: ^5.8.0
@@ -404,6 +401,9 @@ importers:
       '@mosaicstack/db':
         specifier: workspace:*
         version: link:../db
+      commander:
+        specifier: ^13.0.0
+        version: 13.1.0
       drizzle-orm:
         specifier: ^0.45.1
         version: 0.45.1(@electric-sql/pglite@0.2.17)(@opentelemetry/api@1.9.0)(@types/better-sqlite3@7.6.13)(@types/pg@8.15.6)(better-sqlite3@12.8.0)(kysely@0.28.11)(postgres@3.4.8)
@@ -457,15 +457,15 @@ importers:
       '@clack/prompts':
         specifier: ^0.9.1
         version: 0.9.1
-      '@mosaicstack/brain':
-        specifier: workspace:*
-        version: link:../brain
       '@mosaicstack/config':
         specifier: workspace:*
         version: link:../config
       '@mosaicstack/forge':
         specifier: workspace:*
         version: link:../forge
+      '@mosaicstack/log':
+        specifier: workspace:*
+        version: link:../log
       '@mosaicstack/macp':
         specifier: workspace:*
         version: link:../macp