Create .npmignore and verify clean package output

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Description

Create .npmignore excluding: .mgw/, .worktrees/, .planning/, .github/, .claude/, .test/, .git, node_modules, *.md except README.md. Run npm pack and inspect tarball contents — should include only dist/, commands/, templates/, package.json, README.md, LICENSE. Verify npm pack size is reasonable (under 500KB). Fix any issues found.

Acceptance Criteria

• Create .npmignore and verify clean package output

GSD Route

plan-phase

Phase Context

Phase 3: Package Preparation of v1 — NPM Publishing & Distribution

Depends on

polish-package-json-metadata-for-npm-reg

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MGW · work-started · 2026-02-27T02:41:51Z
Milestone: v1 — NPM Publishing & Distribution | Phase 3: Package Preparation

Work Started

Issue	#21 — Create .npmignore and verify clean package output
Route	plan-phase
Phase	3 of 5 — Package Preparation
Milestone	v1 — NPM Publishing & Distribution

Milestone Progress (1/5 complete)

#	Issue	Status	PR
20	Polish package.json metadata for npm registry	✓ Done	#43
21	Create .npmignore and verify clean package output	◆ In Progress	—
22	Add npx support for zero-install trial run	○ Pending	—
23	Create CHANGELOG.md with retroactive release history	○ Pending	—
24	Add README badges and publish workflow documentation	○ Pending	—

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MGW · pr-ready · 2026-02-27T02:47:17Z
Milestone: v1 — NPM Publishing & Distribution | Phase 3: Package Preparation

PR Ready

PR #44 — #44

Created .npmignore with comprehensive exclusions. Package verified: 22 files, 58.6 kB, only dist/, commands/, templates/, package.json, README.md, LICENSE included.

Testing procedures posted on the PR.
This issue will auto-close when the PR is merged.

Milestone Progress (2/5 complete)

#	Issue	Status	PR
20	Polish package.json metadata for npm registry	✓ Done	#43
21	Create .npmignore and verify clean package output	✓ Done	#44
22	Add npx support for zero-install trial run	○ Pending	—
23	Create CHANGELOG.md with retroactive release history	○ Pending	—
24	Add README badges and publish workflow documentation	○ Pending	—