fix(hermes-auto-improve): squash merge + correction PR existante dans create_github_pr

- GitHub repo configuré squash-only (allow_merge_commit=false, allow_rebase_merge=false)
- create_github_pr() vérifie si une PR hermes/daily-work est déjà ouverte :
  si oui → met à jour titre+body (pas de PR dupliquée)
  si non → crée une nouvelle PR
- Supprime le bug de silence sur "a pull request for branch X already exists"

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

tools/hermes-auto-improve/auto-improve.py

@@ -125,12 +125,29 @@ def rag_ingest() -> str:
 
 # ── Créer la PR GitHub ───────────────────────────────────────────
 
+def _get_open_hermes_pr():
+    """Retourne le numéro et l'URL de la PR Hermes ouverte, ou None."""
+    r = subprocess.run(
+        ["gh", "pr", "list", "--repo", "Alkatrazz24/Funk-lab",
+         "--head", BRANCH, "--state", "open", "--json", "number,url"],
+        capture_output=True, text=True, timeout=30, cwd=str(REPO_DIR)
+    )
+    if r.returncode != 0:
+        return None
+    try:
+        prs = json.loads(r.stdout)
+        return prs[0] if prs else None
+    except (json.JSONDecodeError, IndexError):
+        return None
+
+
 def create_github_pr(summary: str) -> dict:
     today = datetime.now().strftime("%Y-%m-%d")
     diff  = git(["diff", "--stat", "origin/main...HEAD"])
     stats = diff.stdout.strip() or "Aucune modification depuis main"
 
-    body = f"""## Rapport quotidien Hermes — {today}
+    title = f"[Hermes] Rapport documentation — {today}"
+    body  = f"""## Rapport quotidien Hermes — {today}
 
 Ce Pull Request est créé automatiquement par Hermes à 22h.
 
@@ -144,26 +161,38 @@ Ce Pull Request est créé automatiquement par Hermes à 22h.
 
 ### Comment reviewer
 1. Vérifier les rapports dans `admin/hermes/builtin/`
-2. Merger si tout semble correct, ou fermer pour recommencer demain
+2. Merger quand tout semble correct (squash merge configuré)
 
 > Généré par `hermes-doc-worker` · branche `{BRANCH}`
 """
 
+    existing = _get_open_hermes_pr()
+    if existing:
+        # Met à jour le titre et le corps de la PR existante
+        subprocess.run(
+            ["gh", "pr", "edit", str(existing["number"]),
+             "--repo",  "Alkatrazz24/Funk-lab",
+             "--title", title,
+             "--body",  body],
+            capture_output=True, text=True, timeout=30, cwd=str(REPO_DIR)
+        )
+        return {"html_url": existing["url"],
+                "number":   existing["number"],
+                "title":    title,
+                "updated":  True}
+
     r = subprocess.run(
-        [
-            "gh", "pr", "create",
-            "--title", f"[Hermes] Rapport documentation — {today}",
-            "--body",  body,
-            "--head",  BRANCH,
-            "--base",  "main",
-            "--repo",  "Alkatrazz24/Funk-lab",
-        ],
-        capture_output=True, text=True, timeout=30,
-        cwd=str(REPO_DIR),
+        ["gh", "pr", "create",
+         "--title", title,
+         "--body",  body,
+         "--head",  BRANCH,
+         "--base",  "main",
+         "--repo",  "Alkatrazz24/Funk-lab"],
+        capture_output=True, text=True, timeout=30, cwd=str(REPO_DIR)
     )
     if r.returncode == 0:
         pr_url = r.stdout.strip()
-        return {"html_url": pr_url, "title": f"[Hermes] Rapport documentation — {today}"}
+        return {"html_url": pr_url, "title": title}
     return {"error": r.stderr.strip() or "gh pr create a échoué"}
 
 

tools/hermes-auto-improve/trigger-server.py

@@ -31,6 +31,25 @@ _running     = False
 _last_result = None
 
 
+def _extract_last_json(text: str):
+    """Find the outermost JSON object at the end of mixed text+JSON output."""
+    end = text.rfind("}")
+    if end < 0:
+        return None
+    depth = 0
+    for i in range(end, -1, -1):
+        if text[i] == "}":
+            depth += 1
+        elif text[i] == "{":
+            depth -= 1
+            if depth == 0:
+                try:
+                    return json.loads(text[i:end + 1])
+                except json.JSONDecodeError:
+                    return None
+    return None
+
+
 def run_script(extra_args: list = None):
     global _running, _last_result
     with _lock:
@@ -50,13 +69,8 @@ def run_script(extra_args: list = None):
             if result.stderr:
                 log.write(f"STDERR: {result.stderr}")
 
-        out   = result.stdout
-        start = out.rfind("{")
-        end   = out.rfind("}") + 1
-        if start >= 0 and end > start:
-            _last_result = json.loads(out[start:end])
-        else:
-            _last_result = {"error": "no_json", "stdout": out[-500:]}
+        out = result.stdout
+        _last_result = _extract_last_json(out) or {"error": "no_json", "stdout": out[-500:]}
 
     except subprocess.TimeoutExpired:
         _last_result = {"error": "timeout"}