…eservation

Synced with github/spec-kit upstream (v0.0.93). Brings in:
- Modular extension system (github#1551)
- Fix .specify path error (github#1588)
- Preserve constitution.md during reinitialization (github#1553)
- Markdown lint fixes (github#1571)

Resolved pyproject.toml conflict: kept Trimble naming/version while
accepting upstream's new dependencies (pyyaml, packaging) and test config.

All Trimble-specific changes preserved:
- Modus Docs MCP integration in plan.md, implement.md, plan-template.md
- MCP configs (mcp-standard.json, mcp-vscode.json)
- Modus MCP handler in __init__.py
- PyPI publishing workflow and README

Co-authored-by: Cursor <[email protected]>

….0.98)

Key upstream changes absorbed:
- Modular extension system (PR github#1551): plugin architecture with YAML
  manifests, extension catalog, hook system, CLI management commands
- Constitution preservation on reinit (PR github#1553): template moved to
  templates/constitution-template.md, user customizations preserved
- .specify.specify path bug fix (PR github#1588): double-nesting resolved
- Google Anti Gravity agent support (PR github#1220): new agy agent in release
- Stale workflow (PR github#1594): auto-close inactive issues after 180 days
- Dependabot config (PR github#1622): automated pip and Actions updates
- Markdownlint fixes (PR github#1571), plan template typo (PR github#1446)
- README maintainers section removed (PR github#1618)

Conflict resolutions:
- pyproject.toml: kept our version (0.0.20.post1) over upstream 0.1.0
- plan-template.md: kept /sp.plan prefix over upstream /speckit.plan
- create-release-packages.sh: merged agy agent + kept our
  generate_agent_rules; updated constitutionplus/command-rules paths
  from memory/ to templates/ to match upstream rename
- README.md: kept our SpecifyPlus content, dropped upstream maintainers
  section (already removed upstream), preserved contributing section
- templates/command-rules.md, templates/constitutionplus.md: accepted
  memory/ → templates/ relocation matching upstream convention

Co-Authored-By: Claude Opus 4.6 <[email protected]>

* fix: resolve markdownlint errors across documentation (github#1571)

- Add language specifiers to fenced code blocks (bash, text)
- Fix whitespace issues around code fences
- Disable MD036 (emphasis as heading) for intentional warning text
- Disable MD060 (table column style) for existing table formats

Co-authored-by: Claude Opus 4.5 <[email protected]>

* fix: preserve constitution.md during reinitialization (github#1541) (github#1553)

Moves constitution template from memory/ to templates/ to prevent
overwrites when spec-kit is reinitialized with a different AI agent.

Changes:
- Move memory/constitution.md to templates/constitution-template.md
- Update CLI to copy template to memory/ only on first initialization
- Update constitution command to reference correct paths with .specify/ prefix
- Preserve existing constitution.md when reinitializing project

The CLI now checks if .specify/memory/constitution.md exists:
- If it exists: preserve it (no overwrite)
- If it doesn't exist: copy from .specify/templates/constitution-template.md

This allows users to customize their constitution without losing changes
when adding support for additional AI agents or reinitializing.

Fixes github#1541

Co-authored-by: jjoung1128 <[email protected]>
Co-authored-by: Claude Sonnet 4.5 <[email protected]>

* Merge commit '4afbd87abb45744966bbeaaa71d20742cf778c48' into chore/merge-upstream-v0.0.91