feat(openspec): add list command change proposal

docs(openspec): add complexity guidelines to README and templates

openspec/README.md

@@ -10,6 +10,23 @@ OpenSpec is an AI-native system for change-driven development where:
 - **AI drives the process** - You generate proposals, humans review and approve
 - **Specs are living documentation** - Always kept in sync with deployed code
 
+## Start Simple
+
+**Default to minimal implementations:**
+- New features should be <100 lines of code initially
+- Use the simplest solution that works
+- Avoid premature optimization (no caching, parallelization, or complex patterns without proven need)
+- Choose boring technology over cutting-edge solutions
+
+**Complexity triggers** - Only add complexity when you have:
+- **Performance data** showing current solution is too slow
+- **Scale requirements** with specific numbers (>1000 users, >100MB data)
+- **Multiple use cases** requiring the same abstraction
+- **Regulatory compliance** mandating specific patterns
+- **Security threats** that simple solutions cannot address
+
+When triggered, document the specific justification in your change proposal.
+
 ## Directory Structure
 
 ```
@@ -72,6 +89,11 @@ Before any task:
 - Adding tests for existing behavior
 - Documentation fixes
 
+**Complexity assessment:**
+- If your solution requires >100 lines of new code, justify the complexity
+- If adding dependencies, frameworks, or architectural patterns, document why simpler alternatives won't work
+- Default to single-file implementations until proven insufficient
+
 ### 3. Creating a Change Proposal
 
 When a user requests a significant change:
@@ -383,10 +405,12 @@ Progress communication:
 - "Implementing approved changes..."
 
 ### For AI Assistants
+- **Bias toward simplicity** - Propose the minimal solution that works
 - Use your exploration tools liberally before proposing
 - Batch operations for efficiency
 - Communicate your progress
 - It's OK to revise proposals based on discoveries
+- **Question complexity** - If your solution feels complex, simplify first
 
 ## Edge Case Handling
 
@@ -442,6 +466,7 @@ Proposal REQUIRED if:
 - Specs must always reflect deployed reality
 - Changes are proposed, not imposed
 - Impact analysis prevents surprises
-- The simplicity is the power - just markdown files
+- Simplicity is the power - just markdown files, minimal solutions
+- Start simple, add complexity only when justified
 
 By following these conventions, you enable true spec-driven development where documentation stays current, changes are traceable, and evolution is intentional.

openspec/changes/add-complexity-guidelines/tasks.md

@@ -1,9 +0,0 @@
-# Implementation Tasks
-
-## 1. Update OpenSpec README
-- [ ] 1.1 Add "Start Simple" section after Core Principle
-- [ ] 1.2 Add complexity triggers to "When to Create Change Proposals" section
-- [ ] 1.3 Update AI workflow guidance to emphasize minimal implementations
-
-## 2. Update CLAUDE.md
-- [ ] 2.1 Add complexity management rules to project instructions

openspec/changes/add-list-command/proposal.md

@@ -0,0 +1,20 @@
+# Add List Command to OpenSpec CLI
+
+## Why
+
+Developers need visibility into available changes and their status to understand the project's evolution and pending work.
+
+## What Changes
+
+- Add `openspec list` command that displays all changes in the changes/ directory
+- Show each change name with task completion count (e.g., "add-auth: 3/5 tasks")
+- Display completion status indicator (✓ for fully complete, progress for partial)
+- Skip the archive/ subdirectory to focus on active changes
+- Simple table output for easy scanning
+
+## Impact
+
+- Affected specs: New capability `cli-list` will be added
+- Affected code:
+  - `src/cli/index.ts` - Add list command
+  - `src/core/list.ts` - New file with directory scanning and task parsing (~60 lines)

openspec/changes/add-list-command/specs/cli-list/spec.md

@@ -0,0 +1,69 @@
+# List Command Specification
+
+## Purpose
+
+The `openspec list` command SHALL provide developers with a quick overview of all active changes in the project, showing their names and task completion status.
+
+## Behavior
+
+### Command Execution
+
+WHEN `openspec list` is executed
+THEN scan the `openspec/changes/` directory for change directories
+AND exclude the `archive/` subdirectory from results
+AND parse each change's `tasks.md` file to count task completion
+
+### Task Counting
+
+WHEN parsing a `tasks.md` file
+THEN count tasks matching these patterns:
+- Completed: Lines containing `- [x]`
+- Incomplete: Lines containing `- [ ]`
+AND calculate total tasks as the sum of completed and incomplete
+
+### Output Format
+
+WHEN displaying the list
+THEN show a table with columns:
+- Change name (directory name)
+- Task progress (e.g., "3/5 tasks" or "✓ Complete")
+- Status indicator:
+  - `✓` for fully completed changes (all tasks done)
+  - Progress fraction for partial completion
+
+Example output:
+```
+Changes:
+  add-auth-feature     3/5 tasks
+  update-api-docs      ✓ Complete
+  fix-validation       0/2 tasks
+  add-list-command     1/4 tasks
+```
+
+### Empty State
+
+WHEN no active changes exist (only archive/ or empty changes/)
+THEN display: "No active changes found."
+
+### Error Handling
+
+IF a change directory has no `tasks.md` file
+THEN display the change with "No tasks" status
+
+IF `openspec/changes/` directory doesn't exist
+THEN display error: "No OpenSpec changes directory found. Run 'openspec init' first."
+AND exit with code 1
+
+### Sorting
+
+Changes SHALL be displayed in alphabetical order by change name for consistency.
+
+## Why
+
+Developers need a quick way to:
+- See what changes are in progress
+- Identify which changes are ready to archive
+- Understand the overall project evolution status
+- Get a bird's-eye view without opening multiple files
+
+This command provides that visibility with minimal effort, following OpenSpec's philosophy of simplicity and clarity.

openspec/changes/add-list-command/tasks.md

@@ -0,0 +1,26 @@
+# Implementation Tasks
+
+## 1. Core Implementation
+- [ ] 1.1 Create `src/core/list.ts` with list logic
+  - [ ] 1.1.1 Implement directory scanning (exclude archive/)
+  - [ ] 1.1.2 Implement task counting from tasks.md files
+  - [ ] 1.1.3 Format output as simple table
+- [ ] 1.2 Add list command to CLI in `src/cli/index.ts`
+  - [ ] 1.2.1 Register `openspec list` command
+  - [ ] 1.2.2 Connect to list.ts implementation
+
+## 2. Error Handling
+- [ ] 2.1 Handle missing openspec/changes/ directory
+- [ ] 2.2 Handle changes without tasks.md files
+- [ ] 2.3 Handle empty changes directory
+
+## 3. Testing
+- [ ] 3.1 Add tests for list functionality
+  - [ ] 3.1.1 Test with multiple changes
+  - [ ] 3.1.2 Test with completed changes
+  - [ ] 3.1.3 Test with no changes
+  - [ ] 3.1.4 Test error conditions
+
+## 4. Documentation
+- [ ] 4.1 Update CLI help text with list command
+- [ ] 4.2 Add list command to README if applicable

openspec/changes/archive/2025-08-11-add-complexity-guidelines/tasks.md

@@ -0,0 +1,9 @@
+# Implementation Tasks
+
+## 1. Update OpenSpec README
+- [x] 1.1 Add "Start Simple" section after Core Principle
+- [x] 1.2 Add complexity triggers to "When to Create Change Proposals" section
+- [x] 1.3 Update AI workflow guidance to emphasize minimal implementations
+
+## 2. Update CLAUDE.md
+- [x] 2.1 Add complexity management rules to project instructions

openspec/specs/cli-update/spec.md

@@ -0,0 +1,59 @@
+# Update Command Specification
+
+## Purpose
+
+As a developer using OpenSpec, I want to update the OpenSpec instructions in my project when new versions are released, so that I can benefit from improvements to AI agent instructions.
+
+## Core Requirements
+
+### Update Behavior
+
+The update command SHALL update OpenSpec instruction files to the latest templates.
+
+WHEN a user runs `openspec update` THEN the command SHALL:
+- Check if the `openspec` directory exists
+- Replace `openspec/README.md` with the latest template (complete replacement)
+- Update the OpenSpec-managed block in `CLAUDE.md` using markers
+  - Preserve user content outside markers
+  - Create `CLAUDE.md` if missing
+- Display ASCII-safe success message: "Updated OpenSpec instructions"
+
+### Prerequisites
+
+The command SHALL require:
+- An existing `openspec` directory (created by `openspec init`)
+
+IF the `openspec` directory does not exist THEN:
+- Display error: "No OpenSpec directory found. Run 'openspec init' first."
+- Exit with code 1
+
+### File Handling
+
+The update command SHALL:
+- Completely replace `openspec/README.md` with the latest template
+- Update only the OpenSpec-managed block in `CLAUDE.md` using markers
+- Use the default directory name `openspec`
+- Be idempotent (repeated runs have no additional effect)
+
+## Edge Cases
+
+### File Permissions
+IF file write fails THEN let the error bubble up naturally with file path.
+
+### Missing CLAUDE.md
+IF CLAUDE.md doesn't exist THEN create it with the template content.
+
+### Custom Directory Name
+Not supported in this change. The default directory name `openspec` SHALL be used.
+
+## Success Criteria
+
+Users SHALL be able to:
+- Update OpenSpec instructions with a single command
+- Get the latest AI agent instructions
+- See clear confirmation of the update
+
+The update process SHALL be:
+- Simple and fast (no version checking)
+- Predictable (same result every time)
+- Self-contained (no network required)

src/core/templates/claude-template.ts

@@ -4,4 +4,23 @@ This document provides instructions for AI coding assistants on how to use OpenS
 
 This project uses OpenSpec for spec-driven development. Specifications are the source of truth.
 
-See @openspec/README.md for detailed conventions and guidelines.`;
+See @openspec/README.md for detailed conventions and guidelines.
+
+## Complexity Management
+
+**Default to minimal solutions:**
+- Propose <100 lines of new code for features
+- Prefer single-file implementations until proven insufficient
+- Avoid frameworks, abstractions, and optimizations without clear justification
+- Choose boring, well-understood patterns over novel approaches
+
+**Question requests for complexity:**
+- Caching? → Ask for performance data and targets
+- New framework? → Suggest plain code first
+- Extra layers? → Start with the thinnest viable design
+
+**Justify complexity with data:**
+- Performance metrics showing current solution is too slow
+- Concrete scale requirements (e.g., >1000 users, >100MB data)
+- Multiple proven use cases requiring an abstraction
+`;

src/core/templates/readme-template.ts

@@ -10,6 +10,23 @@ OpenSpec is an AI-native system for change-driven development where:
 - **AI drives the process** - You generate proposals, humans review and approve
 - **Specs are living documentation** - Always kept in sync with deployed code
 
+## Start Simple
+
+**Default to minimal implementations:**
+- New features should be <100 lines of code initially
+- Use the simplest solution that works
+- Avoid premature optimization (no caching, parallelization, or complex patterns without proven need)
+- Choose boring technology over cutting-edge solutions
+
+**Complexity triggers** - Only add complexity when you have:
+- **Performance data** showing current solution is too slow
+- **Scale requirements** with specific numbers (>1000 users, >100MB data)
+- **Multiple use cases** requiring the same abstraction
+- **Regulatory compliance** mandating specific patterns
+- **Security threats** that simple solutions cannot address
+
+When triggered, document the specific justification in your change proposal.
+
 ## Directory Structure
 
 \`\`\`
@@ -72,6 +89,11 @@ Before any task:
 - Adding tests for existing behavior
 - Documentation fixes
 
+**Complexity assessment:**
+- If your solution requires >100 lines of new code, justify the complexity
+- If adding dependencies, frameworks, or architectural patterns, document why simpler alternatives won't work
+- Default to single-file implementations until proven insufficient
+
 ### 3. Creating a Change Proposal
 
 When a user requests a significant change:
@@ -383,10 +405,12 @@ Progress communication:
 - "Implementing approved changes..."
 
 ### For AI Assistants
+- **Bias toward simplicity** - Propose the minimal solution that works
 - Use your exploration tools liberally before proposing
 - Batch operations for efficiency
 - Communicate your progress
 - It's OK to revise proposals based on discoveries
+- **Question complexity** - If your solution feels complex, simplify first
 
 ## Edge Case Handling
 
@@ -442,7 +466,8 @@ Proposal REQUIRED if:
 - Specs must always reflect deployed reality
 - Changes are proposed, not imposed
 - Impact analysis prevents surprises
-- The simplicity is the power - just markdown files
+- Simplicity is the power - just markdown files, minimal solutions
+- Start simple, add complexity only when justified
 
 By following these conventions, you enable true spec-driven development where documentation stays current, changes are traceable, and evolution is intentional.
 `;