Tests write stdout.log/stderr.log into the test repo root, which made
`git status --porcelain` non-empty and broke test 3 (non-main branch
abort) by tripping the dirty-tree check first.
Add a .gitignore to the test fixture repo to filter out these files.
1. npm version check: three-state logic (exists/missing/error) to prevent
silent skip on network failures, registry 5xx, or auth issues.
2. workflow_dispatch: checkout the specified tag and validate SHA matches,
preventing builds from wrong ref.
3. Atomic push: use `git push --atomic` and detect unpushed tags via
`git ls-remote` instead of `--no-merged` (catches branch-pushed-but-
tag-failed state).
1. Update release-cli.yml to make create-release depend on publish-npm with proper skip_npm handling, preventing half-released state where GitHub Release exists but npm package is unavailable.
2. Rewrite publish-cli-test.sh to cover the new publish flow: main branch check, dirty tree detection, tag baseline sync, version bumping, tag conflict detection, user cancellation, and atomic push verification.
- Add publish script with env validation, git checks, and build/test/pack preflights
- Add comprehensive test suite for publish workflow (302 lines)
- Update cli/package.json with @astron-team scope and full npm metadata
- Add README.md with user-focused documentation and registry info
- Add .env.example template for publish configuration
- Add Apache 2.0 LICENSE
- Add Makefile targets for build/test/lint/typecheck/publish workflows
- All publish targets include .env.local validation
- Update installation instructions across all documentation to use @astron-team/skillhub
