diff --git a/README.md b/README.md
index dd3b584..2f3954e 100644
--- a/README.md
+++ b/README.md
@@ -221,6 +221,13 @@ you — that heuristic matches code and documentation placeholders too often to
 writes a committable `.claude/promoted.lock.json` and uploads a content-addressed bundle; an
 unchanged re-promotion uploads nothing.
 
+Keep a prompt out of the bundle with `--exclude-prompt <name>`, repeatable. This exists for the
+case where the command that _drives_ promotion lives in the project being promoted: with `HOME`
+pointed at that project, its `.claude/commands/` is the prompts directory, so without the flag such
+a command ships itself into every bundle. Excluding the entry prompt is refused outright, and an
+exclusion that matches nothing warns — an unmatched exclusion would otherwise ship the prompt you
+meant to omit.
+
 Dispatch it by adding one field to any prompt leaf:
 
 ```json
diff --git a/harness/src/promote.ts b/harness/src/promote.ts
index c76307f..3cbd06f 100644
--- a/harness/src/promote.ts
+++ b/harness/src/promote.ts
@@ -11,6 +11,8 @@ export interface PromoteArgs {
   mode: PromoteMode;
   sandboxImage: string;
   deny: string[];
+  /** Prompt names to keep out of the bundle; see BuildBundleInput.excludePrompts. */
+  excludePrompts: string[];
   dryRun: boolean;
   project?: string;
 }
@@ -22,6 +24,7 @@ export function parsePromoteArgs(argv: string[]): PromoteArgs {
     // Matches deploy/knative/setup-k8s.sh:30 so the checked-in inventory (Task 14) resolves.
     sandboxImage: 'ghcr.io/rossoctl/serverless-harness-sandbox:latest',
     deny: [],
+    excludePrompts: [],
     dryRun: false,
   };
   for (let i = 0; i < argv.length; i++) {
@@ -36,14 +39,24 @@ export function parsePromoteArgs(argv: string[]): PromoteArgs {
       i++;
     } else if (flag === '--sandbox-image') ((args.sandboxImage = value ?? ''), i++);
     else if (flag === '--deny') (args.deny.push(value ?? ''), i++);
-    else if (flag === '--project') {
+    else if (flag === '--exclude-prompt') {
+      // Unlike --deny, reject an empty value: a silently-empty exclusion matches no prompt and
+      // ships the one the caller meant to omit.
+      if (!value) throw new Error('--exclude-prompt requires a prompt name');
+      args.excludePrompts.push(value);
+      i++;
+    } else if (flag === '--project') {
       if (!value) throw new Error('--project requires a directory');
       args.project = value;
       i++;
     } else if (flag === '--dry-run') args.dryRun = true;
     else throw new Error(`unknown flag: ${flag}`);
   }
-  if (!args.entry) throw new Error('usage: sh promote --entry <prompt-name> [--mode attended]');
+  if (!args.entry) {
+    throw new Error(
+      'usage: promote --entry <prompt-name> [--mode attended] [--exclude-prompt <name>]',
+    );
+  }
   return args;
 }
 
@@ -206,6 +219,7 @@ export function promoteInputs(opts: {
     entry: opts.args.entry,
     mode: opts.args.mode,
     userDenyList: opts.args.deny,
+    excludePrompts: opts.args.excludePrompts,
     sandboxImage: opts.args.sandboxImage,
     ...(opts.inventory ? { inventory: opts.inventory } : {}),
     versions: opts.versions,
diff --git a/harness/test/promote.test.ts b/harness/test/promote.test.ts
index 71ec3de..8520a68 100644
--- a/harness/test/promote.test.ts
+++ b/harness/test/promote.test.ts
@@ -31,6 +31,29 @@ afterEach(() => {
   rmSync(root, { recursive: true, force: true });
 });
 
+describe('parsePromoteArgs --exclude-prompt', () => {
+  it('collects repeated exclusions in order', () => {
+    const a = parsePromoteArgs([
+      '--entry',
+      'go',
+      '--exclude-prompt',
+      'promote',
+      '--exclude-prompt',
+      'scratch',
+    ]);
+    expect(a.excludePrompts).toEqual(['promote', 'scratch']);
+  });
+
+  it('requires a value, rather than silently excluding the empty name', () => {
+    // Asserts the specific message, not just any error mentioning the flag: while the flag was
+    // unknown, `unknown flag: --exclude-prompt` also matched /--exclude-prompt/ and the test
+    // passed without the feature existing.
+    expect(() => parsePromoteArgs(['--entry', 'go', '--exclude-prompt'])).toThrow(
+      /--exclude-prompt requires a prompt name/,
+    );
+  });
+});
+
 describe('parsePromoteArgs', () => {
   it('requires an entry', () => {
     expect(() => parsePromoteArgs([])).toThrow(/--entry/);
@@ -45,6 +68,7 @@ describe('parsePromoteArgs', () => {
       mode: 'unattended',
       sandboxImage: 'ghcr.io/rossoctl/serverless-harness-sandbox:latest',
       deny: [],
+      excludePrompts: [],
       dryRun: false,
     });
   });
diff --git a/packages/config-bundle/src/build.ts b/packages/config-bundle/src/build.ts
index b8ed030..753f1c6 100644
--- a/packages/config-bundle/src/build.ts
+++ b/packages/config-bundle/src/build.ts
@@ -10,6 +10,7 @@ import {
   checkMemoryLinks,
   checkNamespacedPrompts,
   checkSiblingPaths,
+  checkExcludedPrompts,
 } from './preflight.js';
 import { resolveSkills } from './resolve.js';
 import { blockingSecrets, scanEntriesForSecrets, SecretScanError } from './secret-scan.js';
@@ -119,13 +120,20 @@ export function buildBundle(input: BuildBundleInput): BuildResult {
     memoryPaths.push(path);
   }
 
+  const excluded = new Set(input.excludePrompts ?? []);
+  const excludedSeen = new Set<string>();
   const promptNames: string[] = [];
   for (const name of markdownFiles(input.promptsDir)) {
+    const promptName = name.replace(/\.md$/, '');
+    if (excluded.has(promptName)) {
+      excludedSeen.add(promptName);
+      continue;
+    }
     entries.push({
       path: `prompts/${name}`,
       content: readFileSync(join(input.promptsDir!, name)),
     });
-    promptNames.push(name.replace(/\.md$/, ''));
+    promptNames.push(promptName);
   }
 
   const fragments = [
@@ -179,9 +187,12 @@ export function buildBundle(input: BuildBundleInput): BuildResult {
     ...checkSiblingPaths(classification.travels),
     ...checkMemoryLinks(memoryIndex, memoryNames),
     ...checkBinaries(binaries, input.inventory),
-    ...checkEntry(input.entry, promptNames),
+    // Suppressed when the entry is what was excluded: `entry_excluded` already names the cause,
+    // and `unknown_entry` would report the symptom of it as a second, independent-looking error.
+    ...(excluded.has(input.entry) ? [] : checkEntry(input.entry, promptNames)),
     ...checkInteraction(classification),
     ...checkNamespacedPrompts(namespacedPromptDirs(input.promptsDir)),
+    ...checkExcludedPrompts(input.entry, input.excludePrompts ?? [], excludedSeen),
   ];
 
   const tar = canonicalTar([
diff --git a/packages/config-bundle/src/preflight.ts b/packages/config-bundle/src/preflight.ts
index ee30ddd..25b6769 100644
--- a/packages/config-bundle/src/preflight.ts
+++ b/packages/config-bundle/src/preflight.ts
@@ -219,6 +219,52 @@ export function checkNamespacedPrompts(namespacedDirs: string[]): PreflightFindi
   }));
 }
 
+/**
+ * Account for every `--exclude-prompt`, in both directions.
+ *
+ * Excluding the entry is an **error**: the bundle would otherwise build happily and then fail as
+ * `unknown_entry`, which names the symptom rather than the cause the user typed.
+ *
+ * An exclusion matching nothing is a **warning**, because that is what a typo looks like — and a
+ * typo here fails in the worst way available, by shipping the very prompt the user asked to keep
+ * out. Both directions are reported so an omission is never silent.
+ */
+export function checkExcludedPrompts(
+  entry: string,
+  requested: string[],
+  actuallyExcluded: Set<string>,
+): PreflightFinding[] {
+  const findings: PreflightFinding[] = [];
+  for (const name of requested) {
+    if (name === entry) {
+      findings.push({
+        severity: 'error',
+        code: 'entry_excluded',
+        message:
+          `--exclude-prompt '${name}' names the entry prompt, so the bundle would carry no entry; ` +
+          `choose a different entry or drop the exclusion`,
+      });
+      continue;
+    }
+    if (actuallyExcluded.has(name)) {
+      findings.push({
+        severity: 'warn',
+        code: 'prompt_excluded',
+        message: `prompt '${name}' was excluded by --exclude-prompt and is not in the bundle`,
+      });
+    } else {
+      findings.push({
+        severity: 'warn',
+        code: 'prompt_exclude_unmatched',
+        message:
+          `--exclude-prompt '${name}' matched no prompt, so nothing was excluded for it ` +
+          `(check the spelling: an unmatched exclusion ships the prompt you meant to omit)`,
+      });
+    }
+  }
+  return findings;
+}
+
 export function hasErrors(findings: PreflightFinding[]): boolean {
   return findings.some((f) => f.severity === 'error');
 }
diff --git a/packages/config-bundle/src/types.ts b/packages/config-bundle/src/types.ts
index 13428f2..60cb018 100644
--- a/packages/config-bundle/src/types.ts
+++ b/packages/config-bundle/src/types.ts
@@ -115,6 +115,14 @@ export interface BuildBundleInput {
   entry: string;
   mode: PromoteMode;
   userDenyList?: string[];
+  /**
+   * Prompt names (no `.md`) to leave out of the bundle.
+   *
+   * Exists so a slash command that drives promotion can live in the project it promotes without
+   * shipping itself: with `HOME` pointed at the project, `promptsDir` IS that project's
+   * `.claude/commands/`, and every markdown file in it otherwise travels.
+   */
+  excludePrompts?: string[];
   sandboxImage: string;
   /** Commands the sandbox image provides; undefined ⇒ cannot verify. */
   inventory?: string[];
diff --git a/packages/config-bundle/test/build.test.ts b/packages/config-bundle/test/build.test.ts
index 4c25863..0fee9ff 100644
--- a/packages/config-bundle/test/build.test.ts
+++ b/packages/config-bundle/test/build.test.ts
@@ -148,3 +148,54 @@ describe('buildBundle', () => {
     expect(r.findings.some((f) => f.code === 'namespaced_prompt_skipped')).toBe(false);
   });
 });
+
+describe('buildBundle --exclude-prompt', () => {
+  // Local to this suite: adding these to the shared fixture would change promptNames for every
+  // other test, which is collateral damage rather than coverage.
+  beforeEach(() => {
+    write('prompts/promote.md', 'promote this project');
+    write('prompts/helper.md', 'a second prompt');
+  });
+
+  it('omits an excluded prompt from the bundle while keeping the others', () => {
+    const paths = untar(buildBundle({ ...baseInput(), excludePrompts: ['promote'] }).tar).map(
+      (e) => e.path,
+    );
+    expect(paths).not.toContain('prompts/promote.md');
+    expect(paths).toContain('prompts/go.md');
+    expect(paths).toContain('prompts/helper.md');
+  });
+
+  it('records each exclusion as a warning, so a silent omission is impossible', () => {
+    const r = buildBundle({ ...baseInput(), excludePrompts: ['promote'] });
+    const f = r.findings.find((x) => x.code === 'prompt_excluded');
+    expect(f?.severity).toBe('warn');
+    expect(f?.message).toContain('promote');
+  });
+
+  it('warns when an exclusion matches nothing, which is how a typo surfaces', () => {
+    const r = buildBundle({ ...baseInput(), excludePrompts: ['promotte'] });
+    const f = r.findings.find((x) => x.code === 'prompt_exclude_unmatched');
+    expect(f?.severity).toBe('warn');
+    expect(f?.message).toContain('promotte');
+  });
+
+  it('refuses to exclude the entry prompt instead of failing later as unknown_entry', () => {
+    const r = buildBundle({ ...baseInput(), entry: 'go', excludePrompts: ['go'] });
+    const f = r.findings.find((x) => x.code === 'entry_excluded');
+    expect(f?.severity).toBe('error');
+    expect(r.findings.some((x) => x.code === 'unknown_entry')).toBe(false);
+  });
+
+  it('changes the digest, because the bundle content changed', () => {
+    const withAll = buildBundle(baseInput()).digest;
+    const without = buildBundle({ ...baseInput(), excludePrompts: ['promote'] }).digest;
+    expect(without).not.toBe(withAll);
+  });
+
+  it('is a no-op when no exclusions are given', () => {
+    expect(buildBundle({ ...baseInput(), excludePrompts: [] }).digest).toBe(
+      buildBundle(baseInput()).digest,
+    );
+  });
+});