docs(community): add a community showcase

[clay-good]

Status

LGTM. Documentation checks, independent review, and all required CI checks passed for the latest revision. Ready for final maintainer approval.

Motivation

Give the community a shared place to showcase projects and resources built with and for OpenSpec, while keeping individual project listings out of the main README.

What it does

• Adds docs/community.md as a community-owned awesome list, with OpenSpec UI as its first entry.
• Invites contributors to submit a one-line project link and description through a PR.
• Asks entries to explain their OpenSpec relevance, avoid advertising and referral links, and disclose paid features or required accounts.
• Replaces the README's project listing with a link in its Docs section and adds the page to the documentation index.
• Makes independent maintenance and the absence of official endorsement explicit.

Closes #1692.

Proof it works

• Rendered all three changed Markdown pages through GitHub's Markdown API.
• Verified the README and documentation-index links resolve to the new page, the project listing appears only in the showcase, and contribution headings render correctly.
• git diff --check passed.
• Independent review of the revised documentation found no issues. CodeRabbit completed its review with no actionable comments.
• CI passed: Linux, macOS, and Windows test suites, lint and type checking, and release tracking. CodeQL, dependency review, audit, website lockfile drift, and the Cloudflare Pages build also passed.
• The first entry's description was checked against its public repository and implementation. The external application was not executed or security-audited.

Notes

Documentation only: no runtime, dependency, installation, or workflow changes. No local runtime tests were run; the full repository suites passed in CI on the updated PR. No dedicated changeset is needed.

Prepared with Codex using GPT-5, with an independent Codex subagent review.

Summary by CodeRabbit

• Documentation
  • Added a Community Showcase page featuring an initial project and contribution guidelines.
  • Added links to the showcase from the main and documentation indexes.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro Plus

Run ID: 043ab9bd-f747-480b-b6a9-34f95c5e1f1d

📥 Commits

Reviewing files that changed from the base of the PR and between a0ddb60 and c65c277.

📒 Files selected for processing (3)

• README.md
• docs/README.md
• docs/community.md

Included review availability: Your plan provides up to 10 included reviews per hour; 9 remain after this review.

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📝 Walkthrough

Walkthrough

Changes

Community Showcase

Layer / File(s)	Summary
Showcase page and navigation docs/community.md, README.md, docs/README.md	Added a Community Showcase page with an OpenSpec UI entry, maintenance disclaimer, and contribution guidelines. Added links to the page in both documentation indexes.

Estimated code review effort: 1 (Trivial) | ~5 minutes

Merge Risk: ⚪ Minimal · up to c65c2

This documentation-only change adds a community showcase and links it from existing documentation indexes. No actionable merge-blocking risk remains beyond normal checks and maintainer review.

Suggested reviewers: alfred-openspec, tabishb

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Linked Issues check	✅ Passed	The PR satisfies issue #1692 by adding OpenSpec UI to an independent community showcase and linking the showcase from the project documentation.
Out of Scope Changes check	✅ Passed	All changes support the documented objectives. The PR contains only related documentation updates for the community showcase and its navigation links.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the main change: adding a community showcase documentation page and related links.

Full details: Docstring Coverage

Explanation

No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0 files. (3 skipped: 3 unsupported.)

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch codex/docs-community-openspec-ui-1692

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[openspec-cloud]

Nothing to compare — no requirement applies to this change.

AI-generated · A citation proves the line exists, not that it makes the case — verify before acting.
Checked the 0 requirements selected for this PR at ade1d31 (255 total).
View results · Click Refresh, then Scan again in the check. Or comment /openspec-cloud.

[TabishB]

Readme section is valuable space, we're trying to explain the project at a high level. This kinda info should live outside of the main readme.

[cloudflare-workers-and-pages]

Deploying openspec-docs with    Cloudflare Pages

Latest commit:	c65c277
Status:	✅  Deploy successful!
Preview URL:	https://e65ae72f.openspec-docs.pages.dev
Branch Preview URL:	https://codex-docs-community-openspe.openspec-docs.pages.dev

View logs

[clay-good]

Moved the project listing into docs/community.md. The main README now contains only a link in its Docs section. The new page is a community-owned showcase with OpenSpec UI as the first entry, a one-line PR contribution format, and guidance on relevance, commercial disclosures, and independent support.

[alfred-openspec]

Reviewed exact head c65c277. The project listing now lives outside the README body, both navigation links resolve correctly, the OpenSpec UI description matches its public repository, and the independent-maintenance and contribution guidance is clear. All required checks are green. LGTM.