FeatherSpec 0.3.0 — Commands & Persisted Plans

Added

• Persisted plans: /sdd-plan writes NNNN-slug.plan.md beside its spec — baby steps with
  per-step Verify lines, a current-step pointer, a handoff block and a
  criteria→steps→code traceability table; three modes (plan, resume, re-plan).
• Plan upkeep rule (.claude/rules/plans.md); /sdd-lifecycle moves spec and plan as a
  pair.
• .github/prompts/*.prompt.md thin loaders giving GitHub Copilot slash commands.

Changed

• Breaking (pre-1.0): command bodies moved from .claude/skills/*/SKILL.md to
  .claude/commands/*.md; skills removed entirely so no command description is ever
  advertised to the model. .vscode/settings.json swaps chat.agentSkillsLocations for
  chat.promptFilesLocations.

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Retroactive release — tagged 2026-08-26 to version the pre-release history. Original date: 2026-08-03.