fix: broken cross-references, version sync, and enhanced command validator

- Fix /build-and-fix → /build-fix in tdd.md, plan.md (+ cursor, zh-CN)
- Fix non-existent explorer agent → planner in orchestrate.md (+ cursor, zh-CN, zh-TW)
- Fix /python-test → /tdd in python-review.md (+ cursor, zh-CN)
- Sync package.json version from 1.0.0 to 1.4.1 to match plugin.json
- Enhance validate-commands.js with cross-reference checking:
  command refs, agent path refs, skill dir refs, workflow diagrams
- Strip fenced code blocks before scanning to avoid false positives
- Skip hypothetical "Creates:" lines in evolve.md examples
- Add 46 new tests (suggest-compact, session-manager, utils, hooks)

scripts/hooks/session-end.js

@@ -153,8 +153,9 @@ async function main() {
     if (summary) {
       const existing = readFile(sessionFile);
       if (existing && existing.includes('[Session context goes here]')) {
+        // Use a flexible regex that tolerates CRLF, extra whitespace, and minor template variations
         const updatedContent = existing.replace(
-          /## Current State\n\n\[Session context goes here\]\n\n### Completed\n- \[ \]\n\n### In Progress\n- \[ \]\n\n### Notes for Next Session\n-\n\n### Context to Load\n```\n\[relevant files\]\n```/,
+          /## Current State\s*\n\s*\[Session context goes here\][\s\S]*?### Context to Load\s*\n```\s*\n\[relevant files\]\s*\n```/,
           buildSummarySection(summary)
         );
         writeFile(sessionFile, updatedContent);

scripts/hooks/suggest-compact.js

@@ -25,7 +25,7 @@ async function main() {
   // Track tool call count (increment in a temp file)
   // Use a session-specific counter file based on session ID from environment
   // or parent PID as fallback
-  const sessionId = process.env.CLAUDE_SESSION_ID || String(process.ppid) || 'default';
+  const sessionId = process.env.CLAUDE_SESSION_ID || 'default';
   const counterFile = path.join(getTempDir(), `claude-tool-count-${sessionId}`);
   const rawThreshold = parseInt(process.env.COMPACT_THRESHOLD || '50', 10);
   const threshold = Number.isFinite(rawThreshold) && rawThreshold > 0 && rawThreshold <= 10000