docs(idd): note the pnpm -- passthrough footgun for four helper scripts

[kurone-kito]

Summary

Adds a short note to docs/idd-helper-scripts.md, next to the existing
"Authoritative invocation surface per profile" section, documenting a
pnpm-specific ---forwarding footgun. pnpm forwards a literal --
separator to invoked package.json scripts instead of stripping it
(npm strips it). idd-skill's shared cli-args.mts parser already
strips one leading bare --, but four idd:<name> scripts route
around that shared parser and reproduce the footgun: idd:post-idd-marker
and idd:emit-marker fail with missing value for argument: --;
idd:discover-orphan-filter and idd:discover-roadmap-graph fail with
unknown argument: --. The note states the workaround (drop the
leading --) with a concrete before/after example.

Closes #145

Background

Two of the six idd-skill scripts excluded from the shared parser were
checked and found not to need a workaround note, for different
reasons, so this PR deliberately does not list them: idd:merge-execute
absorbs the stray -- into a passthrough array that a downstream,
already-fixed parser strips, so it never reproduces the bug in
practice; idd:onboard has no corresponding package.json script in
this repository at all.

This is a known upstream (idd-skill) gap, not a local
misconfiguration; the note flags itself for review whenever the
@kurone-kito/idd-skill pin changes, since a future bump may narrow or
remove the affected list.

Documentation-only change — no code, workflow, or config file changes.

Summary by CodeRabbit

• Documentation
  • Documented a pnpm argument-forwarding compatibility issue affecting four idd:* commands.
  • Added corrected command examples that omit the argument separator.
  • Noted that the affected command list should be reviewed after dependency updates.

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• docs/idd-helper-scripts.md

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• docs/idd-helper-scripts.md

---

📝 Walkthrough

Walkthrough

The documentation explains pnpm’s literal -- forwarding behavior, identifies four affected idd:* scripts, and provides invocation examples without the separator. It also notes that the affected list should be reviewed after dependency pin changes.

Changes

IDD helper script invocation documentation

Layer / File(s)	Summary
Document pnpm argument forwarding docs/idd-helper-scripts.md	Documents the four affected scripts and the workaround to invoke them without a leading --. It states that other scripts tolerate both invocation forms.

Estimated code review effort: 1 (Trivial) | ~2 minutes

Mergeability Score: 🔵 Low · up to 8ed32

The documentation adds a pnpm workaround for four helper scripts, with no runtime or production behavior changes. Mergeability depends on confirming that the affected-script list is complete, or narrowing the note to commands that are verified.

Possibly related PRs

• kurone-kito/builder-config#88: Documents related pnpm argument-forwarding behavior.
• kurone-kito/builder-config#89: Modifies the same helper-script documentation and establishes related invocation conventions.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly identifies the documentation change and the pnpm argument-forwarding issue affecting four helper scripts.
Description check	✅ Passed	The description explains the change, affected scripts, workaround, scope, background, and linked issue in sufficient detail.
Linked Issues check	✅ Passed	The documentation addresses the linked issue objectives, including the exact four scripts, workaround, upstream context, and exclusions.
Out of Scope Changes check	✅ Passed	The changes are limited to the requested documentation update, with no unrelated code, workflow, or configuration changes.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

✨ Finishing Touches 💡 1

🛠️ Fix failing CI checks 💡

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch issue/145-docs-idd-document-pnpm-passthrough

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[Copilot]

Pull request overview

Documents the pnpm argument-separator behavior affecting four IDD helper scripts, satisfying issue #145.

Changes:

• Lists the four affected scripts and their errors.
• Provides a concrete no-separator workaround.
• Notes that dependency pin updates may resolve the upstream gap.

---

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[Copilot]

Pull request overview

Copilot reviewed 1 out of 1 changed files in this pull request and generated no new comments.

[Copilot]

Pull request overview

Copilot reviewed 1 out of 1 changed files in this pull request and generated no new comments.

[kurone-kito]

Rejected — coderabbitai[bot] did not review HEAD 36bcb6e (review limit reached / rate limited); this is not a completed review (source: #issuecomment-5283593672)

[github-actions]

F4 Cleanup Evidence (server-side fallback via post-merge-cleanup.yml)

Field	Value
Status	applied
Applied	4
Failed	0
Skipped	6
Permission-blocked	0
Posted by	post-merge-cleanup workflow