chore: add missing v1.6.0 release changeset

[TabishB]

Summary

• Add the missing release tracking for two user-facing features and two notable fixes already merged to main.
• Keep the proposed release at @fission-ai/openspec@1.6.0; the catch-up changeset is a minor bump, matching the existing Version Packages PR.

Covered merged PRs

• feat: add Oh My Pi (OMP) tool support #1276 — Oh My Pi command and skill support
• feat(skills): propose /opsx:update planning-artifact update skill #1278 — /opsx:update planning-artifact workflow
• fix(stores): allow empty store registration #1328 — registration and use of fresh stores with empty planning directories
• fix archive scenario drift for #1246 #1252 — protection against stale archives deleting existing scenarios

Why

The automated Version Packages PR #1295 currently includes five pending changesets but not these four release-worthy changes. Once this PR merges, the Changesets action should update #1295 rather than create another release PR.

Validation

• changeset status resolves @fission-ai/openspec as a minor bump
• git diff --check passes

Summary by CodeRabbit

• New Features

  • Added native OPSX command and skill generation for Oh My Pi projects, including tool detection and supported directory layouts.
  • Added an /opsx:update workflow for revising existing change plans while leaving implementation to /opsx:apply.

• Bug Fixes

  • Improved handling of newly created stores and their initial artifacts.
  • Prevented requirement archiving from removing scenarios added during earlier archives.

• Release

  • Published as a minor release of @fission-ai/openspec.

[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

Run ID: c39a17e6-68e4-4ce9-95c4-a265d540a89b

📥 Commits

Reviewing files that changed from the base of the PR and between 93e27a7 and a58a128.

📒 Files selected for processing (1)

• .changeset/complete-v1-6-release-coverage.md

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📝 Walkthrough

Walkthrough

The changeset declares a minor release for @fission-ai/openspec, covering Oh My Pi support, the /opsx:update workflow, fresh store registration fixes, and safer requirement archiving.

Changes

Release coverage

Layer / File(s)	Summary
Document v1.6 changes .changeset/complete-v1-6-release-coverage.md	Declares a minor release and documents two features and two bug fixes for @fission-ai/openspec.

Estimated code review effort: 1 (Trivial) | ~2 minutes

Possibly related PRs

• Fission-AI/OpenSpec#457: Related OPSX workflow command and archiving changes.
• Fission-AI/OpenSpec#502: Extends OPSX workflow skills in the same package.
• Fission-AI/OpenSpec#516: Related opsx:apply planning and archive synchronization behavior.

Suggested reviewers: alfred-openspec

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly states that this PR adds the missing v1.6.0 release changeset, matching the changeset-focused content.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch codex/changeset-v1-6-release-coverage

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[alfred-openspec]

Release coverage matches the four merged PRs, and the minor bump is consistent with the existing 1.6.0 release. Looks good.