fix(cli): list prs, provider, and export formats in --help

graphify --help omitted the real prs and provider commands and the export format list. Add
them (verbatim from the dispatcher's own usage text), so every listed command/format exists
and the export formats match the supported allow-list.

graphify/__main__.py

@@ -565,6 +565,7 @@ def _run_cli() -> None:
         print("    --top N                 how many to show (default 10)")
         print("    --graph <path>          path to graph.json (default graphify-out/graph.json)")
         print("    --json                  emit JSON instead of text")
+        print("  prs                     PR dashboard: CI state, review status, worktree mapping")
         print("  save-result             save a Q&A result to graphify-out/memory/ for graph feedback loop")
         print("    --question Q            the question asked")
         print("    --answer A              the answer to save")
@@ -617,13 +618,25 @@ def _run_cli() -> None:
         print("    --cargo                 extract crate→crate deps from Cargo.toml")
         print("    --global                also merge the resulting graph into the global graph")
         print("    --as <tag>              repo tag for --global (default: target directory name)")
+        print("  provider [list|show|add|remove]  manage custom LLM providers")
         print("  global add <graph.json>  add/update a project graph in the global graph (~/.graphify/global-graph.json)")
         print("    --as <tag>               repo tag (default: parent directory name)")
         print("  global remove <tag>      remove a repo's nodes from the global graph")
         print("  global list              list repos in the global graph")
         print("  global path              print path to the global graph file")
         print("  benchmark [graph.json]  measure token reduction vs naive full-corpus approach")
+        print("  export html             emit interactive graph.html [--graph PATH] [--labels PATH] [--node-limit N] [--no-viz]")
         print("  export callflow-html    emit Mermaid-based architecture/call-flow HTML")
+        print("                          [GRAPH|DIR] [--graph PATH] [--labels PATH] [--report PATH] [--sections PATH] [--output HTML]")
+        print("                          [--lang auto|zh-CN|en] [--max-sections N] [--diagram-scale N]")
+        print("  export obsidian         emit Obsidian vault notes + canvas [--graph PATH] [--labels PATH] [--dir PATH]")
+        print("  export wiki             emit wiki markdown articles [--graph PATH] [--labels PATH]")
+        print("  export svg              emit graph.svg [--graph PATH] [--labels PATH]")
+        print("  export graphml          emit GraphML [--graph PATH]")
+        print("  export neo4j            emit Cypher or push to Neo4j [--graph PATH] [--push URI] [--user U] [--password P]")
+        print("                          (or set NEO4J_PASSWORD instead of --password to keep it off argv)")
+        print("  export falkordb         emit Cypher or push to FalkorDB [--graph PATH] [--push URI] [--user U] [--password P]")
+        print("                          (or set FALKORDB_PASSWORD instead of --password to keep it off argv)")
         print("  hook install            install post-commit/post-checkout git hooks (all platforms)")
         print("  hook uninstall          remove git hooks")
         print("  hook status             check if git hooks are installed")

tests/test_cli_help.py

@@ -0,0 +1,41 @@
+"""`graphify --help` must list user-facing commands that dispatch_command implements.
+
+#3140: the top-level listing in graphify/__main__.py is hand-maintained and
+drifted from dispatch_command() — prs, provider, and 7 of 8 export formats
+never appeared. Precedent: #2071 / PR #2075 (one usage line + stdout assert).
+"""
+from __future__ import annotations
+
+import subprocess
+import sys
+
+PYTHON = sys.executable
+
+
+def test_help_lists_prs_provider_and_export_formats():
+    """#3140: `graphify --help` must advertise prs, provider, and all export formats."""
+    r = subprocess.run(
+        [PYTHON, "-m", "graphify", "--help"],
+        capture_output=True,
+        text=True,
+    )
+    assert r.returncode == 0, f"--help should exit 0: {r.stderr}"
+    out = r.stdout
+    assert "  prs" in out, "`graphify --help` must list prs (#3140)"
+    assert "provider" in out, "`graphify --help` must list provider (#3140)"
+    for fmt in (
+        "html",
+        "callflow-html",
+        "obsidian",
+        "wiki",
+        "svg",
+        "graphml",
+        "neo4j",
+        "falkordb",
+    ):
+        assert f"export {fmt}" in out, (
+            f"`graphify --help` must list export {fmt} (#3140)"
+        )
+    # Silent hook internals — deliberately excluded from user-facing help.
+    assert "hook-check" not in out
+    assert "hook-guard" not in out