feat(reconciliation): implement deterministic state reconciliation engine and post-commit hook

- Implement ReconciliationEngine in server/src/handlers/reconciliation.rs
- Auto-transition ADRs to implemented, resolve tech debts, and cascade task unblocking
- Ingest git commit events via POST /api/git/commit and scripts/git-reconcile.py post-commit hook
- Add universal pagination, search filtering, and keyboard navigation to dashboard
- Implement non-destructive task TTL expiry sweeper and gate verification
- Implements: ADR-0102, ADR-0103

scripts/git-reconcile.py

@@ -0,0 +1,94 @@
+#!/usr/bin/env python3
+"""
+Deterministic Git Reconciliation Hook for MCP Memory
+Automatically syncs git commit events to mcp-memory to transition ADRs, resolve tech debts,
+complete tasks, cascade-unblock dependent tasks, and recalculate milestone statuses.
+"""
+
+import os
+import sys
+import json
+import subprocess
+import urllib.request
+import urllib.error
+
+def run_git(cmd):
+    try:
+        res = subprocess.run(["git"] + cmd, capture_output=True, text=True, check=True)
+        return res.stdout.strip()
+    except Exception:
+        return ""
+
+def main():
+    port = os.environ.get("MCP_PORT", "3000")
+    
+    # 1. Quick check if server is running
+    ping_url = f"http://127.0.0.1:{port}/ping"
+    try:
+        with urllib.request.urlopen(ping_url, timeout=1.0) as resp:
+            if resp.status != 200:
+                sys.exit(0)
+    except Exception:
+        # Server not running, silently exit
+        sys.exit(0)
+
+    # 2. Extract git metadata
+    commit = run_git(["rev-parse", "HEAD"])
+    branch = run_git(["branch", "--show-current"])
+    author = run_git(["log", "-1", "--pretty=format:%an"])
+    message = run_git(["log", "-1", "--pretty=format:%B"])
+    
+    # Get changed files in this commit
+    files_raw = run_git(["diff-tree", "--no-commit-id", "--name-only", "-r", "HEAD"])
+    files = [f.strip() for f in files_raw.splitlines() if f.strip()]
+
+    if not commit or not message:
+        sys.exit(0)
+
+    payload = {
+        "commit": commit,
+        "branch": branch,
+        "author": author,
+        "message": message,
+        "files": files,
+    }
+
+    # 3. Post to reconciliation endpoint
+    reconcile_url = f"http://127.0.0.1:{port}/api/git/commit"
+    req_data = json.dumps(payload).encode("utf-8")
+    req = urllib.request.Request(
+        reconcile_url,
+        data=req_data,
+        headers={"Content-Type": "application/json"},
+        method="POST"
+    )
+
+    try:
+        with urllib.request.urlopen(req, timeout=3.0) as resp:
+            if resp.status == 200:
+                body = json.loads(resp.read().decode("utf-8"))
+                res = body.get("reconciliation", {})
+                adrs = res.get("implemented_adrs", [])
+                debts = res.get("resolved_tech_debts", [])
+                tasks = res.get("completed_tasks", [])
+                unblocked = res.get("unblocked_tasks", [])
+                milestones = res.get("updated_milestones", [])
+
+                if any([adrs, debts, tasks, unblocked, milestones]):
+                    print("\033[36m[MCP Memory Auto-Reconciled]\033[0m")
+                    if adrs:
+                        print(f"  \033[32m✔ Implemented ADRs:\033[0m {', '.join(adrs)}")
+                    if debts:
+                        print(f"  \033[32m✔ Resolved Tech Debts:\033[0m {', '.join(debts)}")
+                    if tasks:
+                        print(f"  \033[32m✔ Completed Tasks:\033[0m {', '.join(tasks)}")
+                    if unblocked:
+                        print(f"  \033[33m⚡ Unblocked Dependent Tasks:\033[0m {', '.join(unblocked)}")
+                    if milestones:
+                        print(f"  \033[35m🎯 Updated Milestones:\033[0m {', '.join(milestones)}")
+    except Exception:
+        # Never break commit flow on failure
+        pass
+
+if __name__ == "__main__":
+    main()