@@ -8,6 +8,6 @@ The startup banner prints one line per warning class, each warning appears once,
 Clause-②: no
 
 - **One line per class.** Flows that declare a trigger but are not bound are grouped by trigger type and reason, with the flows listed: `⚠ 8 flows declare a 'schedule' trigger but are NOT bound — disabled by deployment policy — … (OS_AUTOMATION_SCHEDULED_WORK_ENABLED is unset or not truthy), so no time trigger arms …: flow_a, flow_b, …`. Before, the full reason (up to ~650 characters) printed once per flow. The banner now shows the reason's first sentence; `--log-level debug` still streams each flow's full reason. A real binding failure, or a missing trigger, keeps its own line, worded as before.
-- **Printed once.** *Boot diagnostics* no longer repeats the automation plugin's per-flow `… is NOT bound` and shadowed-flow warnings, which the banner's `Flows:` list already shows. Its header counts them instead: `⚠ Boot diagnostics — 5 warnings logged during startup (8 more already listed above):`. Every other boot warning replays exactly as before. A boot that fails before the banner still replays all of them.
+- **Printed once.** *Boot diagnostics* no longer repeats the automation plugin's per-flow `… is NOT bound` and shadowed-flow warnings, which the banner's `Flows:` list already shows. Its header counts them instead: `(8 more already listed above)`. Every other boot warning replays exactly as before. A boot that fails before the banner still replays all of them.
 - **OAuth on loopback.** `OAuth is served UNENCRYPTED: …` is logged at `info` when the issuer's host is loopback (`localhost`, `*.localhost`, `127.0.0.0/8`, `::1`), so it is not shown at the default `warn` level. It stays `warn` on a private or link-local issuer. The sentence and the transport rule are unchanged.
 - ⛔ Nothing you author changes. Which flows bind, the scheduled-work switch, the transport rule, the service-automation warning an embedded host reads, and every public key, export and parameter are unchanged.
@@ -0,0 +1,19 @@
+---
+"@objectstack/cli": patch
+---
+
+*Boot diagnostics* puts the one record you have to act on first, with its fix, counts it apart from the informational ones, and no longer prints stack traces at the default log level.
+
+Clause-②: no
+
+- **The record that needs you comes first, with its fix.** A script action declared with no handler (a button wired to nothing) prints first in *Boot diagnostics*, highlighted, naming each action, with its fix on the next line. A blank project with one such action shows:
+
+  ```text
+  ⚠ Boot diagnostics — 1 needs your attention · 2 informational:
+    ⚠ [action-governance] declared script actions with NO handler — a button wired to nothing (ADR-0078): support_desk_ticket:resolve_ticket
+      fix: add a `body`, or register a handler under the declared `target`
+  ```
+
+  Every other record prints once, dim, as before, and the header counts it as informational. When nothing needs your attention the header reads `ℹ Boot diagnostics — 4 informational:`. This record class is the only one highlighted so far.
+- **No stack traces at the default level.** A record that carries an error's stack trace prints with its message and without the trace. The block's last line says how many traces were withheld. At `--log-level debug` the boot streams live, and the same record prints there with its stack.
+- ⛔ Nothing you author changes, and no warning's log level changes. The package that logs a warning sets its level.
@@ -1,7 +1,8 @@
 // Copyright (c) 2026 ObjectStack. Licensed under the Apache-2.0 license.
 
 import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
-import { LiteKernel, type Plugin, type PluginContext } from '@objectstack/core';
+import { LiteKernel, ObjectLogger, type Plugin, type PluginContext } from '@objectstack/core';
+import { runActionGovernanceInventory } from '@objectstack/objectql';
 import { AutomationServicePlugin } from '@objectstack/service-automation';
 import { SCHEDULED_WORK_DISABLED_REASON, SCHEDULED_WORK_ENV } from '@objectstack/types';
 import {
@@ -10,7 +11,7 @@ import {
   type AutomationReadySummary,
   type ServerReadyOptions,
 } from './format.js';
-import { BootLogCapture } from './boot-log-capture.js';
+import { BootLogCapture, isVerboseBootLevel } from './boot-log-capture.js';
 import { collectAutomationSummary } from '../commands/serve.js';
 
 /**
@@ -45,8 +46,28 @@ import { collectAutomationSummary } from '../commands/serve.js';
  * `collectAutomationSummary`, and holds both pins against ONE transcript. The
  * formatter legs after it cover the shapes a real boot does not reach cheaply.
  *
- * ⚠️ The two `@objectstack/*` package imports resolve to their built `dist`
- * (both are already in `KNOWN_UNALIASED_TEST_IMPORTS['@objectstack/cli']`;
+ * ## #22160 — the dev-mode noise budget, the printer's half
+ *
+ * A blank project carrying the Build-with-Claude-Code tutorial's files as they
+ * stood on `main` 7d7943dd booted (`os dev --ui --fresh`) with three WARN
+ * records under *Boot diagnostics*, one of which needs the author: its
+ * `resolve_ticket` action was `type: 'script'` with a `target` nothing
+ * registers — a button wired to nothing. It looked exactly like the other
+ * two, and one of those carried a ten-frame knex stack. (The tutorial has
+ * since made Resolve a declarative update; a script action whose handler
+ * never registers is still what this record names.)
+ * The pins (the seat's scope cut on #22160):
+ *
+ *   - a record carrying a stack prints WITHOUT it at the default level, and
+ *     WITH it at `--log-level debug`, where the boot streams live;
+ *   - the dead-button class prints once, highlighted, with its fix line, and
+ *     the header counts it apart from the informational records;
+ *   - #22073's class pins above stay green.
+ * The level each OTHER line is logged at belongs to its producer and is not
+ * pinned here; nor is any informational count a sibling lane can move.
+ *
+ * ⚠️ The `@objectstack/*` package imports resolve to their built `dist` (all
+ * are already in `KNOWN_UNALIASED_TEST_IMPORTS['@objectstack/cli']`;
  * `turbo.json` builds dependencies before `@objectstack/cli#test`).
  */
 
@@ -303,8 +324,10 @@ describe('print-once: Boot diagnostics withholds what the banner restated (forma
     // dropped.
     expect(linesWith('Branding asset not served')).toHaveLength(1);
     expect(linesWith('/runtime/assets/icon.svg')).toHaveLength(1);
+    // [#22160] Nothing here is in an actionable class, so the header counts
+    // one informational record under an `ℹ`; the withheld count is unchanged.
     expect(linesWith('Boot diagnostics')).toEqual([
-      '  ⚠ Boot diagnostics — 1 warning logged during startup (3 more already listed above):',
+      '  ℹ Boot diagnostics — 1 informational (3 more already listed above):',
     ]);
   });
 
@@ -364,13 +387,173 @@ describe('print-once: Boot diagnostics withholds what the banner restated (forma
     expect(linesWith('is ARMED')).toHaveLength(1); // the banner's line
     expect(linesWith('Flow name collision')).toHaveLength(1);
     expect(linesWith('Boot diagnostics')).toEqual([
-      '  ⚠ Boot diagnostics — 1 warning logged during startup (1 more already listed above):',
+      '  ℹ Boot diagnostics — 1 informational (1 more already listed above):',
     ]);
   });
 
   it('with no banner (the failed-boot path) replays every record', () => {
     printBootDiagnostics({ lines: [auditRecord('a_flow'), unrelated] });
     expect(linesWith('a_flow')).toHaveLength(1);
-    expect(linesWith('Boot diagnostics')).toEqual(['  ⚠ Boot diagnostics — 2 warnings logged during startup:']);
+    expect(linesWith('Boot diagnostics')).toEqual(['  ℹ Boot diagnostics — 2 informational:']);
+  });
+});
+
+// ---------------------------------------------------------------------------
+// #22160 — the dev-mode noise budget
+// ---------------------------------------------------------------------------
+
+/**
+ * A ticket object as the inventory reads it, with a Resolve action that is
+ * `type: 'script'` with a `target` and no `body`, and no handler registered —
+ * the dead button the measured boot carried.
+ */
+const DEAD_BUTTON_TICKET = {
+  name: 'support_desk_ticket',
+  actions: [{ name: 'resolve_ticket', label: 'Resolve', type: 'script', target: 'resolveTicket' }],
+};
+const DEAD_BUTTON = 'support_desk_ticket:resolve_ticket';
+const DEAD_BUTTON_CLASS = 'declared script actions with NO handler';
+
+/** Route stdout into `capture` for the length of `fn`, exactly as `serve`'s boot-quiet window does. */
+async function underQuietWindow(capture: BootLogCapture, fn: () => Promise<unknown> | unknown): Promise<void> {
+  const outSpy = vi.spyOn(process.stdout, 'write').mockImplementation(((chunk: unknown, encoding?: unknown) => {
+    capture.write(chunk as string | Uint8Array, typeof encoding === 'string' ? encoding : undefined);
+    return true;
+  }) as never);
+  try {
+    await fn();
+  } finally {
+    outSpy.mockRestore();
+  }
+}
+
+/**
+ * A failed insert, logged the way the engine's write doors log one: `warn`
+ * with `{ object, error: { message, stack } }` (`writeFailureLogMeta` in
+ * `@objectstack/objectql`'s engine), from a REAL thrown error, so the stack
+ * is V8's own frames.
+ */
+function logFailedInsert(logger: ObjectLogger): void {
+  const err = new Error('UNIQUE constraint failed: sys_migration.id [statement and bound values redacted]');
+  logger.warn('Insert operation failed', { object: 'sys_migration', error: { message: err.message, stack: err.stack } });
+}
+
+/** A V8 frame as it reads inside a JSON-escaped `stack`. */
+const ESCAPED_FRAME = /\\n\s+at /;
+
+describe('the noise budget over real producers (#22160)', () => {
+  /**
+   * One boot's worth of boot-phase records through the REAL `ObjectLogger`
+   * and `BootLogCapture`: an expected degradation, the REAL
+   * `@objectstack/objectql` action inventory over that ticket, and a
+   * failed insert carrying a stack. Returns the captured records and the
+   * inventory's own message, read off the producer as it logged it.
+   */
+  async function boot(format: 'pretty' | 'text' | 'json'): Promise<{ captured: string[]; inventoryMessage: string }> {
+    const capture = new BootLogCapture();
+    const logger = new ObjectLogger({ level: 'warn', format });
+    const messages: string[] = [];
+    const inventoryLogger = {
+      warn: (message: string, meta?: Record<string, unknown>) => {
+        messages.push(message);
+        logger.warn(message, meta);
+      },
+    };
+    await underQuietWindow(capture, async () => {
+      logger.warn('[Analytics] No admitObjectRead configured at init — the bridge resolves per query');
+      await runActionGovernanceInventory({ registered: [], objects: [DEAD_BUTTON_TICKET], logger: inventoryLogger });
+      logFailedInsert(logger);
+    });
+    const captured = capture.diagnostics();
+    printBootDiagnostics({ lines: captured, dropped: capture.droppedCount });
+    expect(messages, 'the real inventory logged nothing for the ticket').toHaveLength(1);
+    return { captured, inventoryMessage: messages[0] };
+  }
+
+  it.each(['pretty', 'text', 'json'] as const)(
+    '%s: the dead button prints once, first, highlighted, with the producer\'s own fix, counted apart',
+    async (format) => {
+      const { captured, inventoryMessage } = await boot(format);
+
+      // The premise: the producer's record reached the capture, naming the action.
+      expect(captured.filter((record) => record.includes(DEAD_BUTTON)), captured.join('\n')).toHaveLength(1);
+
+      const highlighted = linesWith(DEAD_BUTTON_CLASS);
+      expect(highlighted, transcript.join('\n')).toHaveLength(1);
+      expect(linesWith(DEAD_BUTTON)).toEqual(highlighted);
+      // Highlighted: its own glyph line, the statement with its subject.
+      expect(highlighted[0]).toMatch(/^ {4}⚠ \[action-governance\] declared script actions with NO handler/);
+      expect(highlighted[0].endsWith(`: ${DEAD_BUTTON}`)).toBe(true);
+      // The fix is the producer's own sentence after its `; `, on the next line.
+      const at = transcript.indexOf(highlighted[0]);
+      expect(transcript[at + 1]).toBe(`      fix: ${inventoryMessage.slice(inventoryMessage.indexOf('; ') + 2)}`);
+      // First: above every informational record.
+      expect(at).toBeLessThan(transcript.findIndex((line) => line.includes('[Analytics]')));
+      expect(at).toBeLessThan(transcript.findIndex((line) => line.includes('Insert operation failed')));
+      // Counted apart.
+      const header = linesWith('Boot diagnostics');
+      expect(header).toHaveLength(1);
+      expect(header[0]).toContain('1 needs your attention · 2 informational');
+      expect(header[0]).toMatch(/^ {2}⚠ /);
+    },
+  );
+
+  it('withholds a record\'s stack at the default level, keeps its message, and says where the stack is', async () => {
+    const { captured } = await boot('pretty');
+
+    // The premise: the captured record really carries the stack, JSON-escaped.
+    const failed = captured.filter((record) => record.includes('Insert operation failed'));
+    expect(failed).toHaveLength(1);
+    expect(failed[0]).toContain('"stack":"Error: UNIQUE constraint failed');
+    expect(failed[0]).toMatch(ESCAPED_FRAME);
+
+    const printed = linesWith('Insert operation failed');
+    expect(printed).toHaveLength(1);
+    expect(printed[0]).toContain('"object":"sys_migration"');
+    expect(printed[0]).toContain('"error":{"message":"UNIQUE constraint failed: sys_migration.id');
+    expect(printed[0]).not.toContain('"stack"');
+    expect(transcript.join('\n')).not.toMatch(ESCAPED_FRAME);
+
+    const hint = linesWith('stack trace');
+    expect(hint).toHaveLength(1);
+    expect(hint[0]).toContain('1 stack trace');
+    expect(hint[0]).toContain('--log-level debug');
+  });
+
+  it('at --log-level debug the same record reaches the terminal live, stack included', () => {
+    // `serve` never opens the quiet window at a verbose level, so nothing is
+    // captured or replayed: the record goes out exactly as the logger renders it.
+    expect(isVerboseBootLevel('debug')).toBe(true);
+    const written: string[] = [];
+    const outSpy = vi.spyOn(process.stdout, 'write').mockImplementation(((chunk: unknown) => {
+      written.push(String(chunk));
+      return true;
+    }) as never);
+    try {
+      logFailedInsert(new ObjectLogger({ level: 'debug' }));
+    } finally {
+      outSpy.mockRestore();
+    }
+    const live = written.join('').split('\n').filter((line) => line.includes('Insert operation failed'));
+    expect(live).toHaveLength(1);
+    expect(live[0]).toContain('"stack":"Error: UNIQUE constraint failed');
+    expect(live[0]).toMatch(ESCAPED_FRAME);
+  });
+});
+
+describe('the noise budget (formatter, #22160)', () => {
+  it('withholds only stack TRACES — a `stack` key that names something prints as it was', () => {
+    const named = record('Stack loaded {"stack":"support-desk","objects":2}');
+    printBootDiagnostics({ lines: [named] });
+    expect(linesWith('Stack loaded')).toEqual([`    ${named}`]);
+    expect(linesWith('stack trace')).toEqual([]);
+  });
+
+  it('keeps the alarm when the capture dropped records — unread records are not called informational', () => {
+    printBootDiagnostics({ lines: [record('Service not provided — using in-memory fallback')], dropped: 3 });
+    const header = linesWith('Boot diagnostics');
+    expect(header).toHaveLength(1);
+    expect(header[0]).toMatch(/^ {2}⚠ /);
+    expect(header[0]).not.toContain('needs your attention');
   });
 });