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samqbush aa99d75baa Add arch plugin (architecture + modernization skills) (#2253 )

* Add arch plugin (architecture + modernization skills)

Add the `arch` plugin with two skills:
- `arch:document` — produce a single, cited architecture document for a
  locally-cloned repo, reading files on disk only.
- `arch:modernize` — generate a phased modernization plan, auto-running the
  document workflow first when no architecture doc exists.

Skill sources live in top-level skills/ and are referenced declaratively
from plugins/arch/.github/plugin/plugin.json, per the repo's plugin model.
Regenerated docs/README.plugins.md, docs/README.skills.md and marketplace.json.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Merge arch skills into single doc-and-modernize skill

Collapse the document and modernize skills into one standalone skill
(doc-and-modernize) with Documentation and Modernization modes, keeping
the plugin named arch. Modernization mode now runs the Documentation
workflow inline instead of invoking a separate arch:document skill,
fixing standalone-install cross-skill references. Reframe Documentation
mode as local-first (remote/API lookups are a flagged last resort)
rather than local-only. Regenerate docs and marketplace.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Address PR review: list skill by bare ID in arch README

Use 'doc-and-modernize' (repo convention) instead of the namespaced
'arch:doc-and-modernize', noting it surfaces as arch:doc-and-modernize
when installed via the plugin.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Address PR review: use non-HTML placeholder in instructions template

Change plain-text <PROJECT NAME> to [PROJECT NAME] in the header and
first paragraph so Markdown renderers don't parse it as an HTML tag and
drop it. The code-span `<N>` on the phase line is unaffected.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Address PR review + fix codespell CI failure

- Fix codespell: pre-empts -> preempts in the instructions template
- Consistent terminology: replace 'research step/workflow' with
  'Documentation mode' in SKILL.md, README, and plugin.json description
- Fix run-on: add 'that' before 'Modernization mode must surface'
- Regenerate docs/marketplace for the updated plugin description

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Address PR review feedback

- Instruct redacting credentials/tokens from git remote URLs before recording
- CI enforcement: ask user or mark [UNVERIFIED]; remote lookup is flagged last resort

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

---------

Co-authored-by: samqbush <samqbush@users.noreply.github.com>
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

2026-07-10 10:30:32 +10:00

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Arch Plugin

Architecture and modernization toolkit for locally-cloned repositories. It produces a single, cited architecture document from the code on disk, and generates a phased modernization plan that automatically runs Documentation mode first when no architecture document exists yet.

Installation

copilot plugin install arch@awesome-copilot

What's Included

Skills

doc-and-modernize — Two complementary workflows for a locally-cloned repository, in one skill (installed via this plugin it surfaces as arch:doc-and-modernize):
- Documentation mode — Produce one comprehensive, verifiable architecture document for a repository you already have checked out locally. Works local-first (prefers the local checkout, treating remote/API lookups as a flagged last resort), cites every claim to a file + line, flags unverified facts, resolves contradictions, and deep-dives the most complex subsystems. Ideal for onboarding docs and system-design maps.
- Modernization mode — Generate a phased modernization plan for a legacy codebase. If a current architecture document exists it builds on it; otherwise it first runs the Documentation mode workflow to produce one, then continues to the plan. Produces per-feature migration docs, tech-stack recommendations with ADRs, and an adaptive, safety-laddered phased implementation plan.

Source

This plugin is part of Awesome Copilot.

License

MIT

1.5 KiB Raw Blame History