Version Packages (Fission-AI#579)

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

Author: openspec-release-bot[bot]

.changeset/opsx-1.0.md

@@ -1,5 +1,91 @@
 # @fission-ai/openspec
 
+## 1.0.0
+
+### Major Changes
+
+- [#578](https://github.com/Fission-AI/OpenSpec/pull/578) [`0cc9d90`](https://github.com/Fission-AI/OpenSpec/commit/0cc9d9025af367faa1688a7b2606a2549053cd3f) Thanks [@TabishB](https://github.com/TabishB)! - ## OpenSpec 1.0 — The OPSX Release
+
+  The workflow has been rebuilt from the ground up. OPSX replaces the old phase-locked `/openspec:*` commands with an action-based system where AI understands what artifacts exist, what's ready to create, and what each action unlocks.
+
+  ### Breaking Changes
+
+  - **Old commands removed** — `/openspec:proposal`, `/openspec:apply`, and `/openspec:archive` no longer exist
+  - **Config files removed** — Tool-specific instruction files (`CLAUDE.md`, `.cursorrules`, `AGENTS.md`, `project.md`) are no longer generated
+  - **Migration** — Run `openspec init` to upgrade. Legacy artifacts are detected and cleaned up with confirmation.
+
+  ### From Static Prompts to Dynamic Instructions
+
+  **Before:** AI received the same static instructions every time, regardless of project state.
+
+  **Now:** Instructions are dynamically assembled from three layers:
+
+  1. **Context** — Project background from `config.yaml` (tech stack, conventions)
+  2. **Rules** — Artifact-specific constraints (e.g., "propose spike tasks for unknowns")
+  3. **Template** — The actual structure for the output file
+
+  AI queries the CLI for real-time state: which artifacts exist, what's ready to create, what dependencies are satisfied, and what each action unlocks.
+
+  ### From Phase-Locked to Action-Based
+
+  **Before:** Linear workflow — proposal → apply → archive. Couldn't easily go back or iterate.
+
+  **Now:** Flexible actions on a change. Edit any artifact anytime. The artifact graph tracks state automatically.
+
+  | Command              | What it does                                         |
+  | -------------------- | ---------------------------------------------------- |
+  | `/opsx:explore`      | Think through ideas before committing to a change    |
+  | `/opsx:new`          | Start a new change                                   |
+  | `/opsx:continue`     | Create one artifact at a time (step-through)         |
+  | `/opsx:ff`           | Create all planning artifacts at once (fast-forward) |
+  | `/opsx:apply`        | Implement tasks                                      |
+  | `/opsx:verify`       | Validate implementation matches artifacts            |
+  | `/opsx:sync`         | Sync delta specs to main specs                       |
+  | `/opsx:archive`      | Archive completed change                             |
+  | `/opsx:bulk-archive` | Archive multiple changes with conflict detection     |
+  | `/opsx:onboard`      | Guided 15-minute walkthrough of complete workflow    |
+
+  ### From Text Merging to Semantic Spec Syncing
+
+  **Before:** Spec updates required manual merging or wholesale file replacement.
+
+  **Now:** Delta specs use semantic markers that AI understands:
+
+  - `## ADDED Requirements` — New requirements to add
+  - `## MODIFIED Requirements` — Partial updates (add scenario without copying existing ones)
+  - `## REMOVED Requirements` — Delete with reason and migration notes
+  - `## RENAMED Requirements` — Rename preserving content
+
+  Archive parses these at the requirement level, not brittle header matching.
+
+  ### From Scattered Files to Agent Skills
+
+  **Before:** 8+ config files at project root + slash commands scattered across 21 tool-specific locations with different formats.
+
+  **Now:** Single `.claude/skills/` directory with YAML-fronted markdown files. Auto-detected by Claude Code, Cursor, Windsurf. Cross-editor compatible.
+
+  ### New Features
+
+  - **Onboarding skill** — `/opsx:onboard` walks new users through their first complete change with codebase-aware task suggestions and step-by-step narration (11 phases, ~15 minutes)
+
+  - **21 AI tools supported** — Claude Code, Cursor, Windsurf, Continue, Gemini CLI, GitHub Copilot, Amazon Q, Cline, RooCode, Kilo Code, Auggie, CodeBuddy, Qoder, Qwen, CoStrict, Crush, Factory, OpenCode, Antigravity, iFlow, and Codex
+
+  - **Interactive setup** — `openspec init` shows animated welcome screen and searchable multi-select for choosing tools. Pre-selects already-configured tools for easy refresh.
+
+  - **Customizable schemas** — Define custom artifact workflows in `openspec/schemas/` without touching package code. Teams can share workflows via version control.
+
+  ### Bug Fixes
+
+  - Fixed Claude Code YAML parsing failure when command names contained colons
+  - Fixed task file parsing to handle trailing whitespace on checkbox lines
+  - Fixed JSON instruction output to separate context/rules from template — AI was copying constraint blocks into artifact files
+
+  ### Documentation
+
+  - New getting-started guide, CLI reference, concepts documentation
+  - Removed misleading "edit mid-flight and continue" claims that weren't implemented
+  - Added migration guide for upgrading from pre-OPSX versions
+
 ## 0.23.0
 
 ### Minor Changes

CHANGELOG.md

@@ -1,6 +1,6 @@
 {
   "name": "@fission-ai/openspec",
-  "version": "0.23.0",
+  "version": "1.0.0",
   "description": "AI-native system for spec-driven development",
   "keywords": [
     "openspec",