Engineering Method 0.1.0-rc.1

Engineering Method 0.1.0 — release candidate 1

A shared skill plugin for risk-proportionate engineering work in Codex and
Claude Code. This is an explicitly approved pre-release with reduced acceptance
scope, not a fully accepted stable release. Plugin manifests remain 0.1.0.

Included

• Seventeen lifecycle and quality skills: adapted Spec Kit, OpenSpec and selected
  Superpowers practices, with exclusive triggers and artifact handoffs.
• Local backlog and feature inventory, optional GitHub Issues/Sub-Issues and
  dependency synchronization, and explicit compact/session recovery checkpoints.
• Relevant UML architecture gates, cohesive implementation slices, review and
  verification policies, and a shared proportionality/effort brake.
• English installation, maintenance, migration, usage and contribution guides.
  Source: https://github.com/phense/engineering-method.

Verification

• All 301 Python tests passed; portable plugin validator, Claude strict
  validation, compileall, shell syntax and Git whitespace checks passed.
• Provenance audit passed for all three unchanged pinned upstream sources.
• Reproducible committed-source ZIP, with native clean installation in disposable
  configurations on Codex CLI 0.153.4 and Claude Code 2.1.259 (macOS).
• Public GitHub installation, installed source bytes, update, disabling and
  removal verified on both hosts in temporary configuration homes.
• Tracked files/history reviewed for unintended content; no private transcripts,
  credentials, runtime state or external documentation skill are distributed.

No paid model evaluations or new independent review loops were run for this
publication. Existing reviews are reused only within their documented scope.

Open limitations

The full original cross-host release gate has not passed. Current-package
Codex native architecture/independent-reviewer evidence and the final independent
release verdict are still missing. Earlier routing and Claude architecture runs
belong to older, explicitly recorded revisions. No failed gate was weakened or
marked passed. See docs/verification/EM-005-completion-path.md.

Skill routing and policy compliance depend on the host/model. Continuity needs
explicit saved checkpoints; there is no universal compact hook. agentic-rag is
optional. Mermaid validation is semantic, not rendered. GitHub task operations
have fake-boundary coverage; live task mutation acceptance remains open. This
publication does not migrate the project's backlog or create GitHub Issues.

Install

codex plugin marketplace add phense/engineering-method
codex plugin add engineering-method@engineering-method

claude plugin marketplace add phense/engineering-method
claude plugin install engineering-method@engineering-method

These follow main; use the tag v0.1.0-rc.1 or the attached ZIP for fixed
candidate bytes. Restart the host session. Disable overlapping Superpowers or
other lifecycle plugins before use. See docs/installation.md.

Download both assets into one directory and verify before extraction:

shasum -a 256 -c SHA256SUMS
unzip engineering-method-0.1.0-rc.1.zip

MIT License, copyright Peter Hense. Pinned upstream notices and attribution are
included in the archive.