feat(docs): add nexus page BBCode generator

- README.md: add user-facing Requirements, Installation, Compatibility
  block wrapped in nexus:start/end markers before dev Prerequisites
- docs/nexus-page.md: wrap generated sections in generated:start/end markers
- scripts/generate-nexus-page.py: extract nexus block from README, convert
  Markdown to BBCode, inject into nexus-page.md template, print to stdout

Author: codepuncher

README.md

@@ -7,7 +7,33 @@ Supports building on **Linux** (cross-compilation via `clang-cl` + [xwin](https:
 
 ---
 
-## Prerequisites
+<!-- nexus:start -->
+## Requirements
+
+- [SKSE64](https://skse.silverlock.org/)
+- [Address Library for SKSE Plugins](https://www.nexusmods.com/skyrimspecialedition/mods/32444)
+
+## Installation
+
+**Mod manager (recommended):**
+1. Install the requirements above.
+2. Install ExampleMod via your mod manager.
+3. Launch Skyrim via SKSE.
+
+**Manual:**
+1. Install the requirements above.
+2. Copy `ExampleMod.dll` to `Data\SKSE\Plugins\`.
+3. Launch Skyrim via SKSE.
+
+## Compatibility
+
+- Compatible with Skyrim SE and AE.
+- No ESP/ESL required.
+<!-- nexus:end -->
+
+---
+
+## Prerequisites (Developer)
 
 ### All platforms
 - [Git](https://git-scm.com/)

docs/nexus-page.md

@@ -26,6 +26,7 @@ Describe what the mod does.
 
 [line]
 
+<!-- generated:start -->
 [size=4][b]Requirements[/b][/size]
 
 [list]
@@ -59,6 +60,7 @@ Describe what the mod does.
 [*]Compatible with Skyrim SE and AE.
 [*]No ESP/ESL required.
 [/list]
+<!-- generated:end -->
 
 [line]
 

scripts/generate-nexus-page.py

@@ -0,0 +1,168 @@
+#!/usr/bin/env python3
+"""Generate nexus-page BBCode from README.md user-facing content.
+
+Reads the block between <!-- nexus:start --> and <!-- nexus:end --> in README.md,
+converts it to BBCode, injects it into the <!-- generated:start/end --> block in
+docs/nexus-page.md, and prints the final BBCode to stdout.
+
+Usage:
+    python scripts/generate-nexus-page.py
+    python scripts/generate-nexus-page.py | xclip -selection clipboard
+"""
+
+import argparse
+import re
+import sys
+from pathlib import Path
+
+README = Path(__file__).parent.parent / "README.md"
+NEXUS_TEMPLATE = Path(__file__).parent.parent / "docs" / "nexus-page.md"
+
+NEXUS_START = "<!-- nexus:start -->"
+NEXUS_END = "<!-- nexus:end -->"
+GEN_START = "<!-- generated:start -->"
+GEN_END = "<!-- generated:end -->"
+BBCODE_FENCE_OPEN = "```bbcode"
+BBCODE_FENCE_CLOSE = "```"
+
+
+def extract_block(text: str, start_marker: str, end_marker: str) -> str:
+    start = text.find(start_marker)
+    end = text.find(end_marker)
+    if start == -1:
+        sys.exit(f"error: marker not found: {start_marker!r}")
+    if end == -1:
+        sys.exit(f"error: marker not found: {end_marker!r}")
+    if start >= end:
+        sys.exit(f"error: end marker {end_marker!r} appears before start marker {start_marker!r}")
+    return text[start + len(start_marker):end].strip()
+
+
+def md_to_bbcode(md: str) -> str:
+    lines = md.splitlines()
+    output: list[str] = []
+    i = 0
+    first_heading = True
+
+    while i < len(lines):
+        line = lines[i]
+
+        # ## Heading
+        if line.startswith("## "):
+            heading = line[3:].strip()
+            if not first_heading:
+                output.append("")
+                output.append("[line]")
+                output.append("")
+            first_heading = False
+            output.append(f"[size=4][b]{heading}[/b][/size]")
+            i += 1
+            continue
+
+        # Unordered list block
+        if line.startswith("- "):
+            items: list[str] = []
+            while i < len(lines) and lines[i].startswith("- "):
+                items.append(convert_inline(lines[i][2:].strip()))
+                i += 1
+            output.append("[list]")
+            for item in items:
+                output.append(f"[*]{item}")
+            output.append("[/list]")
+            continue
+
+        # Ordered list block — may be preceded by a bold label line
+        if re.match(r"\d+\. ", line):
+            items = []
+            while i < len(lines) and re.match(r"\d+\. ", lines[i]):
+                items.append(convert_inline(re.sub(r"^\d+\. ", "", lines[i])))
+                i += 1
+            output.append("[list=1]")
+            for item in items:
+                output.append(f"[*]{item}")
+            output.append("[/list]")
+            continue
+
+        # Bold label (e.g. **Mod manager (recommended):**)
+        if re.match(r"\*\*.+\*\*", line):
+            output.append(convert_inline(line))
+            i += 1
+            continue
+
+        # Blank line
+        if line.strip() == "":
+            output.append("")
+            i += 1
+            continue
+
+        # Unsupported construct
+        stripped = line.strip()
+        if stripped and not stripped.startswith("<!--"):
+            sys.exit(f"error: unsupported Markdown construct on line {i + 1}: {line!r}")
+
+        i += 1
+
+    # Collapse consecutive blank lines to single blank
+    result = re.sub(r"\n{3,}", "\n\n", "\n".join(output))
+    return result.strip()
+
+
+def convert_inline(text: str) -> str:
+    # [text](url) → [url=url]text[/url]
+    # Note: link text containing ] or URLs containing unbalanced ) are not supported.
+    text = re.sub(r"\[([^\]]+)\]\(([^)]*(?:\([^)]*\)[^)]*)*)\)", r"[url=\2]\1[/url]", text)
+    # **text** → [b]text[/b]
+    text = re.sub(r"\*\*(.+?)\*\*", r"[b]\1[/b]", text)
+    # `code` → [font=Courier New]code[/font]
+    text = re.sub(r"`([^`]+)`", r"[font=Courier New]\1[/font]", text)
+    return text
+
+
+def extract_bbcode_fence(text: str) -> str:
+    start = text.find(BBCODE_FENCE_OPEN)
+    if start == -1:
+        sys.exit(f"error: {BBCODE_FENCE_OPEN!r} fence not found in nexus-page.md")
+    start = text.index("\n", start) + 1
+    end = text.find(f"\n{BBCODE_FENCE_CLOSE}", start)
+    if end == -1:
+        sys.exit("error: closing ``` fence not found in nexus-page.md")
+    return text[start:end]
+
+
+def inject_generated(bbcode_content: str, generated: str) -> str:
+    start = bbcode_content.find(GEN_START)
+    end = bbcode_content.find(GEN_END)
+    if start == -1:
+        sys.exit(f"error: marker not found: {GEN_START!r}")
+    if end == -1:
+        sys.exit(f"error: marker not found: {GEN_END!r}")
+    if start >= end:
+        sys.exit(f"error: end marker {GEN_END!r} appears before start marker {GEN_START!r}")
+    return (
+        bbcode_content[:start]
+        + GEN_START + "\n"
+        + generated + "\n"
+        + bbcode_content[end:]
+    )
+
+
+def main() -> None:
+    argparse.ArgumentParser(
+        description=__doc__,
+        formatter_class=argparse.RawDescriptionHelpFormatter,
+    ).parse_args()
+
+    readme = README.read_text(encoding="utf-8")
+    template = NEXUS_TEMPLATE.read_text(encoding="utf-8")
+
+    md_block = extract_block(readme, NEXUS_START, NEXUS_END)
+    bbcode_generated = md_to_bbcode(md_block)
+
+    bbcode_content = extract_bbcode_fence(template)
+    result = inject_generated(bbcode_content, bbcode_generated)
+
+    print(result)
+
+
+if __name__ == "__main__":
+    main()