refactor(spec): update folder structure and dimensions

- Change folder from .workflow/ to .ccw/
- Reduce dimensions from 4 to 2: specs, personal
- Remove changelog and roadmap dimensions
- Update help text and examples

Folder structure:
- .ccw/specs/ - Project rules and conventions
- .ccw/personal/ - Personal preferences (supports global ~/.ccw/personal/)
- .ccw/.spec-index/ - Index cache

Keyword categories for workflow stages:
- exploration - Code exploration, analysis, debugging
- planning - Task planning, requirements
- execution - Implementation, testing, deployment

ccw/src/commands/spec.ts

@@ -95,7 +95,7 @@ async function loadAction(options: SpecOptions): Promise<void> {
 
     const result = await loadSpecs({
       projectPath,
-      dimension: dimension as 'specs' | 'roadmap' | 'changelog' | 'personal' | undefined,
+      dimension: dimension as 'specs' | 'personal' | undefined,
       keywords,
       outputFormat: stdin ? 'hook' : 'cli',
       stdinData,
@@ -355,12 +355,12 @@ ${chalk.bold('USAGE')}
 ${chalk.bold('SUBCOMMANDS')}
   load      Load specs matching dimension/keywords (CLI or Hook mode)
   list      List all indexed specs with readMode and keyword info
-  rebuild   Force re-scan of MD files and rebuild .spec-index cache
+  rebuild   Force re-scan of MD files and rebuild .ccw/.spec-index cache
   status    Show per-dimension stats (total, required, optional, freshness)
-  init      Create 4-dimension directory structure with seed MD documents
+  init      Create 2-dimension directory structure with seed MD documents
 
 ${chalk.bold('OPTIONS')}
-  --dimension <dim>   Target dimension: specs, roadmap, changelog, personal
+  --dimension <dim>   Target dimension: specs, personal
   --keywords <text>   Keywords for spec matching (space or comma separated)
   --stdin             Read input from stdin (Hook mode)
   --json              Output as JSON
@@ -368,7 +368,7 @@ ${chalk.bold('OPTIONS')}
 ${chalk.bold('KEYWORD CATEGORIES')}
   Use these predefined keywords to load specs for specific workflow stages:
   ${chalk.cyan('exploration')}  - Code exploration, analysis, debugging context
-  ${chalk.cyan('planning')}     - Task planning, roadmap, requirements context
+  ${chalk.cyan('planning')}     - Task planning, requirements context
   ${chalk.cyan('execution')}    - Implementation, testing, deployment context
 
 ${chalk.bold('EXAMPLES')}
@@ -400,7 +400,7 @@ ${chalk.bold('EXAMPLES')}
   ccw spec rebuild
 
   ${chalk.gray('# Rebuild single dimension:')}
-  ccw spec rebuild --dimension roadmap
+  ccw spec rebuild --dimension specs
 
   ${chalk.gray('# Check system status:')}
   ccw spec status

ccw/src/tools/spec-index-builder.ts

@@ -1,10 +1,10 @@
 /**
  * Spec Index Builder
  *
- * Scans .workflow/{dimension}/*.md files, parses YAML frontmatter via
- * gray-matter, and writes .spec-index/{dimension}.index.json cache files.
+ * Scans .ccw/{dimension}/*.md files, parses YAML frontmatter via
+ * gray-matter, and writes .ccw/.spec-index/{dimension}.index.json cache files.
  *
- * Supports 4 dimensions: specs, roadmap, changelog, personal
+ * Supports 2 dimensions: specs, personal
  *
  * YAML Frontmatter Schema:
  * ---
@@ -83,9 +83,11 @@ export interface DimensionIndex {
 // ============================================================================
 
 /**
- * The 4 supported spec dimensions.
+ * The 2 supported spec dimensions.
+ * - specs: Project rules and conventions
+ * - personal: Personal preferences (supports global ~/.ccw/personal/)
  */
-export const SPEC_DIMENSIONS = ['specs', 'roadmap', 'changelog', 'personal'] as const;
+export const SPEC_DIMENSIONS = ['specs', 'personal'] as const;
 
 export type SpecDimension = typeof SPEC_DIMENSIONS[number];
 
@@ -100,9 +102,9 @@ const VALID_READ_MODES = ['required', 'optional'] as const;
 const VALID_PRIORITIES = ['critical', 'high', 'medium', 'low'] as const;
 
 /**
- * Directory name for spec index cache files (inside .workflow/).
+ * Directory name for spec index cache files (inside .ccw/).
  */
-const WORKFLOW_DIR = '.workflow';
+const CCW_DIR = '.ccw';
 const SPEC_INDEX_DIR = '.spec-index';
 
 // ============================================================================
@@ -114,27 +116,27 @@ const SPEC_INDEX_DIR = '.spec-index';
  *
  * @param projectPath - Project root directory
  * @param dimension - The dimension name
- * @returns Absolute path to .workflow/.spec-index/{dimension}.index.json
+ * @returns Absolute path to .ccw/.spec-index/{dimension}.index.json
  */
 export function getIndexPath(projectPath: string, dimension: string): string {
-  return join(projectPath, WORKFLOW_DIR, SPEC_INDEX_DIR, `${dimension}.index.json`);
+  return join(projectPath, CCW_DIR, SPEC_INDEX_DIR, `${dimension}.index.json`);
 }
 
 /**
- * Get the path to the .workflow/{dimension} directory.
+ * Get the path to the .ccw/{dimension} directory.
  *
  * @param projectPath - Project root directory
  * @param dimension - The dimension name
- * @returns Absolute path to .workflow/{dimension}/
+ * @returns Absolute path to .ccw/{dimension}/
  */
 export function getDimensionDir(projectPath: string, dimension: string): string {
-  return join(projectPath, '.workflow', dimension);
+  return join(projectPath, CCW_DIR, dimension);
 }
 
 /**
  * Build the index for a single dimension.
  *
- * Scans .workflow/{dimension}/*.md files, parses YAML frontmatter,
+ * Scans .ccw/{dimension}/*.md files, parses YAML frontmatter,
  * extracts the 5 required fields, and returns a DimensionIndex.
  *
  * Files with malformed or missing frontmatter are skipped gracefully.
@@ -194,15 +196,15 @@ export async function buildDimensionIndex(
 }
 
 /**
- * Build indices for all 4 dimensions and write to .spec-index/.
+ * Build indices for all dimensions and write to .ccw/.spec-index/.
  *
- * Creates .spec-index/ directory if it doesn't exist.
+ * Creates .ccw/.spec-index/ directory if it doesn't exist.
  * Writes {dimension}.index.json for each dimension.
  *
  * @param projectPath - Project root directory
  */
 export async function buildAllIndices(projectPath: string): Promise<void> {
-  const indexDir = join(projectPath, WORKFLOW_DIR, SPEC_INDEX_DIR);
+  const indexDir = join(projectPath, CCW_DIR, SPEC_INDEX_DIR);
 
   // Ensure .spec-index directory exists
   if (!existsSync(indexDir)) {
@@ -283,7 +285,7 @@ export async function getDimensionIndex(
   // Build fresh and cache
   const index = await buildDimensionIndex(projectPath, dimension);
 
-  const indexDir = join(projectPath, WORKFLOW_DIR, SPEC_INDEX_DIR);
+  const indexDir = join(projectPath, CCW_DIR, SPEC_INDEX_DIR);
   if (!existsSync(indexDir)) {
     mkdirSync(indexDir, { recursive: true });
   }

ccw/src/tools/spec-init.ts

@@ -1,9 +1,9 @@
 /**
- * Spec Init - Initialize the 4-dimension spec system
+ * Spec Init - Initialize the 2-dimension spec system
  *
- * Creates .workflow/specs/, .workflow/roadmap/, .workflow/changelog/,
- * .workflow/personal/, and .workflow/.spec-index/ directories with
- * seed MD documents containing YAML frontmatter templates.
+ * Creates .ccw/specs/, .ccw/personal/,
+ * and .ccw/.spec-index/ directories with seed MD documents
+ * containing YAML frontmatter templates.
  *
  * Idempotent: skips existing files, only creates missing directories/files.
  */
@@ -39,7 +39,7 @@ export interface InitResult {
 // Constants
 // ---------------------------------------------------------------------------
 
-export const DIMENSIONS = ['specs', 'roadmap', 'changelog', 'personal'] as const;
+export const DIMENSIONS = ['specs', 'personal'] as const;
 export const INDEX_DIR = '.spec-index';
 
 // ---------------------------------------------------------------------------
@@ -55,7 +55,7 @@ export const SEED_DOCS: Map<string, SeedDoc[]> = new Map([
         frontmatter: {
           title: 'Coding Conventions',
           dimension: 'specs',
-          keywords: ['typescript', 'naming', 'style', 'convention'],
+          keywords: ['typescript', 'naming', 'style', 'convention', 'exploration', 'planning', 'execution'],
           readMode: 'required',
           priority: 'high',
         },
@@ -91,7 +91,7 @@ export const SEED_DOCS: Map<string, SeedDoc[]> = new Map([
         frontmatter: {
           title: 'Architecture Constraints',
           dimension: 'specs',
-          keywords: ['architecture', 'module', 'layer', 'pattern'],
+          keywords: ['architecture', 'module', 'layer', 'pattern', 'exploration', 'planning'],
           readMode: 'required',
           priority: 'high',
         },
@@ -174,40 +174,6 @@ export const SEED_DOCS: Map<string, SeedDoc[]> = new Map([
       },
     ],
   ],
-  [
-    'roadmap',
-    [
-      {
-        filename: 'current.md',
-        frontmatter: {
-          title: 'Current Roadmap',
-          dimension: 'roadmap',
-          keywords: ['roadmap', 'plan', 'milestone'],
-          readMode: 'optional',
-          priority: 'medium',
-        },
-        body: `# Current Roadmap
-
-## Active Milestone
-
-- Milestone name and target date
-- Key deliverables
-
-## Upcoming
-
-- Next planned features or improvements
-
-## Completed
-
-- Recently completed milestones for reference
-`,
-      },
-    ],
-  ],
-  [
-    'changelog',
-    [],
-  ],
 ]);
 
 // ---------------------------------------------------------------------------
@@ -246,29 +212,29 @@ export function formatFrontmatter(fm: SpecFrontmatter): string {
  * @returns InitResult with lists of created/skipped paths
  */
 export function initSpecSystem(projectPath: string): InitResult {
-  const workflowDir = join(projectPath, '.workflow');
+  const ccwDir = join(projectPath, '.ccw');
   const result: InitResult = {
     created: [],
     skipped: [],
     directories: [],
   };
 
-  // Ensure .workflow root exists
-  if (!existsSync(workflowDir)) {
-    mkdirSync(workflowDir, { recursive: true });
+  // Ensure .ccw root exists
+  if (!existsSync(ccwDir)) {
+    mkdirSync(ccwDir, { recursive: true });
   }
 
   // Create dimension directories
   for (const dim of DIMENSIONS) {
-    const dirPath = join(workflowDir, dim);
+    const dirPath = join(ccwDir, dim);
     if (!existsSync(dirPath)) {
       mkdirSync(dirPath, { recursive: true });
       result.directories.push(dirPath);
     }
   }
 
-  // Create index directory at project root (matches spec-index-builder.ts location)
-  const indexPath = join(projectPath, INDEX_DIR);
+  // Create index directory inside .ccw (matches spec-index-builder.ts location)
+  const indexPath = join(ccwDir, INDEX_DIR);
   if (!existsSync(indexPath)) {
     mkdirSync(indexPath, { recursive: true });
     result.directories.push(indexPath);
@@ -276,7 +242,7 @@ export function initSpecSystem(projectPath: string): InitResult {
 
   // Write seed documents per dimension
   for (const [dimension, docs] of SEED_DOCS) {
-    const dimDir = join(workflowDir, dimension);
+    const dimDir = join(ccwDir, dimension);
 
     for (const doc of docs) {
       const filePath = join(dimDir, doc.filename);

ccw/src/tools/spec-loader.ts

@@ -105,9 +105,7 @@ interface LoadedSpec {
  */
 const DIMENSION_PRIORITY: Record<string, number> = {
   personal: 1,
-  changelog: 2,
-  roadmap: 3,
-  specs: 4,
+  specs: 2,
 };
 
 /**