Merge branch 'main' into feature/singlerst-builder

Bumps the all-github-actions group with 2 updates: [actions/checkout](https://github.com/actions/checkout) and [actions/setup-python](https://github.com/actions/setup-python).


Updates `actions/checkout` from 4 to 5
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](https://github.com/actions/checkout/compare/v4...v5)

Updates `actions/setup-python` from 5 to 6
- [Release notes](https://github.com/actions/setup-python/releases)
- [Commits](https://github.com/actions/setup-python/compare/v5...v6)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: all-github-actions
- dependency-name: actions/setup-python
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: all-github-actions
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/test.yml

@@ -10,9 +10,9 @@ jobs:
   pre-commit:
       runs-on: ubuntu-latest
       steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - name: Set up Python 3.10
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: "3.10"
       - uses: pre-commit/action@v3.0.1
@@ -23,17 +23,17 @@ jobs:
         python-version: ['3.9', '3.10', '3.11', '3.12']
 
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
 
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@v6
       with:
         python-version: ${{ matrix.python-version }}
 
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        pip install -e ".[dev]"
+        pip install -e . --group dev
 
     # - name: Run mypy
     #   run: |
@@ -52,4 +52,4 @@ jobs:
     #   uses: actions/upload-artifact@v3
     #   with:
     #     name: dist-${{ matrix.python-version }}
-    #     path: dist/
+    #     path: dist/

.pre-commit-config.yaml

@@ -18,13 +18,6 @@ repos:
     hooks:
     - id: flake8
 
-  - repo: https://github.com/pre-commit/mirrors-mypy
-    rev: v1.11.2
-    hooks:
-    - id: mypy
-      files: ^sphinx_llms_txt/
-      additional_dependencies: [types-docutils]
-
   - repo: https://github.com/sphinx-contrib/sphinx-lint
     rev: v1.0.0
     hooks:

.readthedocs.yml

@@ -1,15 +1,17 @@
 version: 2
 
 build:
-  os: "ubuntu-20.04"
+  os: ubuntu-24.04
   tools:
-    python: "3.10"
-
-sphinx:
-  configuration: docs/source/conf.py
-
-python:
-  install:
-    - requirements: docs/requirements.txt
-    - method: pip
-      path: .
+    python: "3.13"
+  commands:
+    - pip install cmake
+    - pip install -r docs/requirements.txt
+    - pip install -e .
+    - cmake --workflow --preset documentation-workflow
+    # Copy built documentation to Read the Docs output directory
+    - mkdir -p $READTHEDOCS_OUTPUT/html
+    - cp -r build/html/* $READTHEDOCS_OUTPUT/html/
+    - cp -r build/markdown/* $READTHEDOCS_OUTPUT/html/
+    - cp -r build/rst/* $READTHEDOCS_OUTPUT/html/
+    - cp build/singlerst/index.rst $READTHEDOCS_OUTPUT/html/llms-full.txt

CHANGELOG.rst

@@ -1,6 +1,36 @@
 Changelog
 =========
 
+0.7.0
+-----
+
+- Add :confval:`llms_txt_uri_template` configuration option to control the link behavior in :confval:`llms_txt_filename`.
+  `#48 <https://github.com/jdillard/sphinx-llms-txt/pull/48>`_
+
+0.6.0
+-----
+
+- Improve _sources directory handling
+  `#47 <https://github.com/jdillard/sphinx-llms-txt/pull/47>`_
+
+0.5.3
+-----
+
+- Make sphinx a required dependency since there are imports from Sphinx
+  `#44 <https://github.com/jdillard/sphinx-llms-txt/pull/44>`_
+
+0.5.2
+-----
+
+- Remove support for singlehtml
+  `#40 <https://github.com/jdillard/sphinx-llms-txt/pull/40>`_
+
+0.5.1
+-----
+
+- Only allow builders that have _sources directory
+  `#38 <https://github.com/jdillard/sphinx-llms-txt/pull/38>`_
+
 0.5.0
 -----
 

CMakeLists.txt

@@ -0,0 +1,8 @@
+cmake_minimum_required(VERSION 3.15)
+project(SphinxLLMsTxt VERSION 1.0.0 LANGUAGES NONE)
+
+# Add CMake module path
+list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake")
+
+# Add documentation
+add_subdirectory(docs)

CMakePresets.json

@@ -0,0 +1,59 @@
+{
+  "version": 6,
+  "configurePresets": [
+    {
+      "name": "documentation",
+      "displayName": "Documentation Build",
+      "description": "Configure project with documentation environment setup",
+      "binaryDir": "${sourceDir}/build"
+    }
+  ],
+  "buildPresets": [
+    {
+      "name": "html",
+      "displayName": "Build HTML Documentation",
+      "configurePreset": "documentation",
+      "targets": ["html"]
+    },
+    {
+      "name": "markdown",
+      "displayName": "Build Markdown Documentation",
+      "configurePreset": "documentation",
+      "targets": ["markdown"]
+    },
+    {
+      "name": "rst",
+      "displayName": "Build reStructuredText Documentation",
+      "configurePreset": "documentation",
+      "targets": ["rst"]
+    },
+    {
+      "name": "singlerst",
+      "displayName": "Build Single reStructuredText Documentation",
+      "configurePreset": "documentation",
+      "targets": ["singlerst"]
+    },
+    {
+      "name": "docs-parallel",
+      "displayName": "Build HTML and Markdown in parallel",
+      "configurePreset": "documentation",
+      "targets": ["html", "markdown", "rst", "singlerst"]
+    }
+  ],
+  "workflowPresets": [
+    {
+      "name": "documentation-workflow",
+      "displayName": "Documentation Build Workflow",
+      "steps": [
+        {
+          "type": "configure",
+          "name": "documentation"
+        },
+        {
+          "type": "build",
+          "name": "docs-parallel"
+        }
+      ]
+    }
+  ]
+}

cmake/SphinxUtils.cmake

@@ -0,0 +1,28 @@
+# Sphinx related utilities
+
+set(SPHINX_SOURCE ${CMAKE_CURRENT_SOURCE_DIR}/source)
+set(SPHINX_BUILD ${CMAKE_BINARY_DIR})
+
+# Function to find Sphinx in the system
+function(setup_sphinx_environment)
+    # Find sphinx-build executable in system
+    find_program(SPHINX_EXECUTABLE
+        NAMES sphinx-build
+        DOC "Sphinx documentation generator"
+    )
+
+    if(NOT SPHINX_EXECUTABLE)
+        message(FATAL_ERROR "sphinx-build not found. Please install Sphinx.")
+    endif()
+
+    # Export to parent scope
+    set(SPHINX_EXECUTABLE "${SPHINX_EXECUTABLE}" PARENT_SCOPE)
+endfunction()
+
+# Function to add a Sphinx builder target
+function(add_sphinx_builder builder_name)
+    add_custom_target(${builder_name}
+        COMMAND ${SPHINX_EXECUTABLE} -b ${builder_name} ${SPHINX_SOURCE} ${SPHINX_BUILD}/${builder_name}
+        VERBATIM
+    )
+endfunction()

docs/CMakeLists.txt

@@ -0,0 +1,8 @@
+include(SphinxUtils)
+
+setup_sphinx_environment()
+
+add_sphinx_builder(html)
+add_sphinx_builder(markdown)
+add_sphinx_builder(rst)
+add_sphinx_builder(singlerst)

docs/requirements.txt

@@ -3,4 +3,7 @@ esbonio
 sphinx-contributors
 sphinx
 sphinx-llms-txt
+sphinx-inline-tabs
 sphinxext-opengraph
+sphinx-markdown-builder
+sphinxcontrib-restbuilder @ git+https://github.com/jdillard/restbuilder.git@feature/singlerst-builder

docs/source/advanced-configuration.rst

@@ -261,6 +261,42 @@ If you want to include absolute URLs for resources in your documentation, you ca
 
 When this option is set, all resolved paths in directives will be prefixed with this URL, creating absolute paths in the generated files.
 
+.. _customizing_uri_links:
+
+Customizing URI Links in llms.txt
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+By default, the ``llms.txt`` file links to source files in the ``_sources`` directory when available, falling back to HTML pages when sources aren't available.
+You can customize this behavior using URI templates with :confval:`llms_txt_uri_template`:
+
+.. code-block:: python
+
+   # Default: Link to source files, if _sources exists
+   llms_txt_uri_template = "{base_url}_sources/{docname}{suffix}{sourcelink_suffix}"
+
+   # Default: Link to HTML pages instead, if _sources doesn't exist
+   llms_txt_uri_template = "{base_url}{docname}.html"
+
+   # Manual: Link to a custom markdown build
+   llms_txt_uri_template = "{base_url}{docname}.md"
+
+.. _available_template_variables:
+
+Available Template Variables
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Your URI template can use the following variables:
+
+- ``{base_url}`` - The base URL from ``html_baseurl`` configuration (includes trailing slash)
+- ``{docname}`` - The document name (e.g., ``index``, ``guide/intro``)
+- ``{suffix}`` - The source file suffix (e.g., ``.rst``, ``.md``) - may be empty if no source file exists
+- ``{sourcelink_suffix}`` - The suffix from ``html_sourcelink_suffix`` configuration (e.g., ``.txt``)
+
+.. tip::
+   Instead of using the default of linking to ``_sources``, you can generate Markdown and/or reStructuredText files from your documentation and link to those in ``llms.txt``.
+   See this package's `CMake setup <https://github.com/jdillard/sphinx-llms-txt>`_ for an example of building both HTML and Markdown and/or reStructuredText in parallel.
+   Note that ``_sources`` is still needed for ``llms-full.txt`` at this time.
+
 .. _integration_examples:
 
 Integration Examples
@@ -285,6 +321,7 @@ Here's a complete example showing multiple :doc:`configuration-values`:
    This is a comprehensive documentation set for our project.
    It includes API references, usage examples, and tutorials.
    """
+   llms_txt_uri_template = "{base_url}{docname}.md"
 
    # Path handling
    html_baseurl = "https://docs.example.com/"

docs/source/conf.py

@@ -15,12 +15,18 @@ import subprocess
 project = "sphinx-llms-txt"
 copyright = "Jared Dillard"
 author = "Jared Dillard"
+
+llms_txt_uri_template = "{base_url}{docname}.md"
+llms_txt_full_file = False
 llms_txt_code_files = ["+:../../sphinx_llms_txt/*.py"]
 llms_txt_summary = """
 A Sphinx extension that generates a summary llms.txt file,written in Markdown,
 and a single combined documentation llms-full.txt file, written in reStructuredText.
 """
 
+# This doesn't seem to be supported
+# rst_file_suffix = ".html.rst"
+
 # check if the current commit is tagged as a release (vX.Y.Z)
 try:
     GIT_TAG_OUTPUT = subprocess.check_output(["git", "tag", "--points-at", "HEAD"])
@@ -49,6 +55,8 @@ extensions = [
     "sphinx.ext.intersphinx",
     "sphinx_contributors",
     "sphinx_llms_txt",
+    "sphinxcontrib.restbuilder",
+    "sphinx_inline_tabs",
 ]
 
 # The language for content autogenerated by Sphinx. Refer to documentation
@@ -88,7 +96,7 @@ html_theme_options = {
     "source_directory": "docs/source/",
 }
 
-html_baseurl = "https://sphinx-llms-txt.readthedocs.org/"
+html_baseurl = "https://sphinx-llms-txt.readthedocs.org/en/latest/"
 
 
 # -- Options for HTMLHelp output ---------------------------------------------

docs/source/configuration-values.rst

@@ -58,6 +58,15 @@ Project Configuration Values
 
    .. versionadded:: 0.2.0
 
+.. confval:: llms_txt_uri_template
+
+   - **Type**: string or ``None``
+   - **Default**: ``None``
+   - **Description**: Template string for generating URIs in ``llms.txt``.
+     See :ref:`customizing_uri_links`.
+
+   .. versionadded:: 0.7.0
+
 .. confval:: llms_txt_directives
 
    - **Type**: list of strings

docs/source/contributing.rst

@@ -19,7 +19,7 @@ Local development
 
    .. code-block:: console
 
-      pip install -e ".[dev]"
+      pip install -e . --group dev
 
 #. Install pre-commit Git hook scripts:
 

docs/source/getting-started.rst

@@ -4,17 +4,19 @@ Getting Started
 Installation
 ------------
 
-Directly install via ``pip`` by using:
+Directly install by using:
 
-.. code-block:: bash
+.. tab:: via pip
 
-    pip install sphinx-llms-txt
+   .. code-block:: bash
 
-Or with ``conda`` via ``conda-forge``:
+      pip install sphinx-llms-txt
 
-.. code::
+.. tab:: via conda:
 
-   conda install -c conda-forge sphinx-llms-txt
+   .. code-block:: bash
+
+      conda install -c conda-forge sphinx-llms-txt
 
 Usage
 -----

pyproject.toml

@@ -26,13 +26,16 @@ classifiers = [
 license = {text = "MIT"}
 readme = "README.md"
 dynamic = ["version"]
+dependencies = [
+    "sphinx",
+]
 
 [project.urls]
 download = "https://pypi.org/project/sphinx-llms-txt/"
 source = "https://github.com/jdillard/sphinx-llms-txt"
 changelog = "https://github.com/jdillard/sphinx-llms-txt/blob/master/CHANGELOG.rst"
 
-[project.optional-dependencies]
+[dependency-groups]
 dev = [
     "pytest>=7.0.0",
     "black",
@@ -40,12 +43,13 @@ dev = [
     "mypy",
     "isort",
     "pre-commit",
-    "sphinx",
 ]
 test = [
     "pytest>=7.0.0",
 ]
 
+[tool.setuptools]
+  packages = ["sphinx_llms_txt"]
 
 [tool.setuptools.dynamic]
 version = {attr = "sphinx_llms_txt.__version__"}
@@ -86,4 +90,4 @@ filterwarnings = [
     "ignore::UserWarning",
     "ignore::DeprecationWarning",
     "ignore::PendingDeprecationWarning",
-]
+]

sphinx_llms_txt/__init__.py

@@ -21,7 +21,7 @@ from .manager import LLMSFullManager
 from .processor import DocumentProcessor
 from .writer import FileWriter
 
-__version__ = "0.5.0"
+__version__ = "0.7.0"
 
 # Export classes needed by tests
 __all__ = [
@@ -85,6 +85,7 @@ def build_finished(app: Sphinx, exception):
         config = {
             "llms_txt_file": app.config.llms_txt_file,
             "llms_txt_filename": app.config.llms_txt_filename,
+            "llms_txt_uri_template": app.config.llms_txt_uri_template,
             "llms_txt_title": app.config.llms_txt_title,
             "llms_txt_summary": summary,
             "llms_txt_full_file": app.config.llms_txt_full_file,
@@ -107,15 +108,15 @@ def build_finished(app: Sphinx, exception):
                     _manager.update_page_title(docname, title)
 
         # Create the combined file
-        _manager.combine_sources(str(app.outdir), str(app.srcdir))
+        _manager.combine_sources(app.outdir, app.srcdir)
 
 
 def setup(app: Sphinx) -> Dict[str, Any]:
     """Set up the Sphinx extension."""
 
-    # Add configuration options
     app.add_config_value("llms_txt_file", True, "env")
     app.add_config_value("llms_txt_filename", "llms.txt", "env")
+    app.add_config_value("llms_txt_uri_template", None, "env")
     app.add_config_value("llms_txt_full_file", True, "env")
     app.add_config_value("llms_txt_full_filename", "llms-full.txt", "env")
     app.add_config_value("llms_txt_full_max_size", None, "env")
@@ -127,14 +128,20 @@ def setup(app: Sphinx) -> Dict[str, Any]:
     app.add_config_value("llms_txt_code_files", [], "env")
     app.add_config_value("llms_txt_code_base_path", None, "env")
 
-    # Connect to Sphinx events
-    app.connect("doctree-resolved", doctree_resolved)
-    app.connect("build-finished", build_finished)
+    def builder_inited(app):
+        """Used to limit what builders are allowed to run the extension."""
 
-    # Reset manager and root paragraph for each build
-    global _manager, _root_first_paragraph
-    _manager = LLMSFullManager()
-    _root_first_paragraph = ""
+        allowed_builders = ["html", "dirhtml"]
+        if hasattr(app, "builder") and app.builder.name in allowed_builders:
+            # Reset manager and root paragraph for each build
+            global _manager, _root_first_paragraph
+            _manager = LLMSFullManager()
+            _root_first_paragraph = ""
+
+            app.connect("doctree-resolved", doctree_resolved)
+            app.connect("build-finished", build_finished)
+
+    app.connect("builder-inited", builder_inited)
 
     return {
         "version": __version__,

sphinx_llms_txt/collector.py

@@ -3,7 +3,7 @@ Document collector module for sphinx-llms-txt.
 """
 
 import fnmatch
-from typing import Any, Dict, List, Optional, Tuple
+from typing import Any, Dict, List, Tuple
 
 from sphinx.environment import BuildEnvironment
 from sphinx.util import logging
@@ -16,8 +16,8 @@ class DocumentCollector:
 
     def __init__(self):
         self.page_titles: Dict[str, str] = {}
-        self.master_doc: Optional[str] = None
-        self.env: Optional[BuildEnvironment] = None
+        self.master_doc: str = None
+        self.env: BuildEnvironment = None
         self.config: Dict[str, Any] = {}
         self.app = None
 
@@ -60,7 +60,7 @@ class DocumentCollector:
         else:
             return [source_suffix]  # String format
 
-    def _get_docname_suffix(self, docname: str, sources_dir) -> Optional[str]:
+    def _get_docname_suffix(self, docname: str, sources_dir) -> str:
         """
         Determine the source suffix for a given docname by checking which
         file exists.
@@ -102,7 +102,7 @@ class DocumentCollector:
 
         return None
 
-    def get_page_order(self, sources_dir=None) -> List[Tuple[str, Optional[str]]]:
+    def get_page_order(self, sources_dir=None) -> List[Tuple[str, str]]:
         """Get the correct page order from the toctree structure.
 
         Args:
@@ -114,7 +114,7 @@ class DocumentCollector:
         if not self.env or not self.master_doc:
             return []
 
-        page_order: List[Tuple[str, Optional[str]]] = []
+        page_order = []
         visited = set()
 
         def collect_from_toctree(docname: str):
@@ -126,7 +126,7 @@ class DocumentCollector:
 
             # Add the current document with its suffix
             if docname not in [doc for doc, _ in page_order]:
-                suffix: Optional[str] = None
+                suffix = None
                 if sources_dir:
                     suffix = self._get_docname_suffix(docname, sources_dir)
                 page_order.append((docname, suffix))
@@ -135,21 +135,18 @@ class DocumentCollector:
             try:
                 # Look for toctree_includes which contains the direct children
                 if (
-                    self.env
-                    and hasattr(self.env, "toctree_includes")
+                    hasattr(self.env, "toctree_includes")
                     and docname in self.env.toctree_includes
                 ):
                     for child_docname in self.env.toctree_includes[docname]:
-                        collect_from_toctree(str(child_docname))
+                        collect_from_toctree(child_docname)
                 # Try to use dependencies to find related documents
                 elif (
-                    self.env
-                    and hasattr(self.env, "dependencies")
+                    hasattr(self.env, "dependencies")
                     and docname in self.env.dependencies
                 ):
                     # Extract the dependent documents from the dependencies dict
-                    for child_docname_obj in self.env.dependencies[docname]:
-                        child_docname = str(child_docname_obj)
+                    for child_docname in self.env.dependencies[docname]:
                         # Only add documents actually in the document set
                         if (
                             hasattr(self.env, "all_docs")
@@ -157,11 +154,7 @@ class DocumentCollector:
                         ):
                             collect_from_toctree(child_docname)
                 # Fallback to titles or other available references
-                elif (
-                    self.env
-                    and hasattr(self.env, "titles")
-                    and hasattr(self.env, "all_docs")
-                ):
+                elif hasattr(self.env, "titles") and hasattr(self.env, "all_docs"):
                     # Get all document names
                     all_docnames = list(self.env.all_docs.keys())
 
@@ -192,7 +185,7 @@ class DocumentCollector:
                 ]
             )
             for docname in remaining:
-                suffix: Optional[str] = None
+                suffix = None
                 if sources_dir:
                     suffix = self._get_docname_suffix(docname, sources_dir)
                 page_order.append((docname, suffix))
@@ -200,8 +193,8 @@ class DocumentCollector:
         return page_order
 
     def filter_excluded_pages(
-        self, page_order: List[Tuple[str, Optional[str]]]
-    ) -> List[Tuple[str, Optional[str]]]:
+        self, page_order: List[Tuple[str, str]]
+    ) -> List[Tuple[str, str]]:
         """Filter out excluded pages from the page order."""
         exclude_patterns = self.config.get("llms_txt_exclude")
         if exclude_patterns:

sphinx_llms_txt/manager.py

@@ -5,7 +5,7 @@ Main manager module for sphinx-llms-txt.
 import glob
 import subprocess
 from pathlib import Path
-from typing import Any, Dict, List, Optional, Tuple, Union, cast
+from typing import Any, Dict, List, Optional, Tuple, Union
 
 from sphinx.application import Sphinx
 from sphinx.environment import BuildEnvironment
@@ -150,8 +150,8 @@ class LLMSFullManager:
         self.ignored_pages.add(docname)
 
     def _filter_ignored_pages(
-        self, page_order: Union[List[str], List[Tuple[str, Optional[str]]]]
-    ) -> Union[List[str], List[Tuple[str, Optional[str]]]]:
+        self, page_order: Union[List[str], List[Tuple[str, str]]]
+    ) -> Union[List[str], List[Tuple[str, str]]]:
         """Filter out ignored pages from page_order."""
         filtered_pages = []
         for item in page_order:
@@ -164,7 +164,7 @@ class LLMSFullManager:
             if docname not in self.ignored_pages:
                 filtered_pages.append(item)
 
-        return cast(Union[List[str], List[Tuple[str, Optional[str]]]], filtered_pages)
+        return filtered_pages
 
     def set_config(self, config: Dict[str, Any]):
         """Set configuration options."""
@@ -197,7 +197,6 @@ class LLMSFullManager:
         possible_sources = [
             Path(outdir) / "_sources",
             Path(outdir) / "html" / "_sources",
-            Path(outdir) / "singlehtml" / "_sources",
         ]
 
         for path in possible_sources:
@@ -205,27 +204,45 @@ class LLMSFullManager:
                 sources_dir = path
                 break
 
-        if not sources_dir:
-            logger.warning(
-                "Could not find _sources directory, skipping llms-full creation"
-            )
-            return
-
-        # Get the correct page order with source suffixes
+        # Get the correct page order (with or without source suffixes)
         page_order = self.collector.get_page_order(sources_dir)
 
         if not page_order:
-            logger.warning(
-                "Could not determine page order, skipping llms-full creation"
-            )
+            logger.warning("Could not determine page order, skipping file generation")
             return
 
         # Apply exclusion filter if configured
         page_order = self.collector.filter_excluded_pages(page_order)
 
-        # Determine output file name and location
+        # If no sources directory, only generate llms.txt and return early
+        if not sources_dir:
+            # Generate llms.txt if requested
+            if self.config.get("llms_txt_file"):
+                filtered_page_order = self._filter_ignored_pages(page_order)
+                self.writer.write_verbose_info_to_file(
+                    filtered_page_order,
+                    self.collector.page_titles,
+                    0,  # No line count since no llms-full.txt
+                    sources_dir,
+                )
+
+            # Only warn if user explicitly wants llms-full.txt
+            if self.config.get("llms_txt_full_file"):
+                # Check if html_copy_source is False
+                if self.app and not self.app.config.html_copy_source:
+                    logger.warning(
+                        "Could not find _sources directory, skipping llms-full.txt."
+                        "Set html_copy_source = True in conf.py to enable."
+                    )
+                else:
+                    logger.warning(
+                        "Could not find _sources directory, skipping llms-full.txt"
+                    )
+            return
+
+        # Determine output file name and location for llms-full.txt
         output_filename = self.config.get("llms_txt_full_filename")
-        output_path = Path(outdir) / str(output_filename)
+        output_path = Path(outdir) / output_filename
 
         # Log discovered files and page order
         logger.debug(f"sphinx-llms-txt: Page order (after exclusion): {page_order}")
@@ -286,7 +303,7 @@ class LLMSFullManager:
         content_parts = []
 
         # Track code files for later processing
-        code_file_parts: List[str] = []
+        code_file_parts = []
 
         # Count lines in code files (initially 0)
         code_files_line_count = 0
@@ -365,7 +382,7 @@ class LLMSFullManager:
         if not (size_limit_exceeded and should_abort_early):
             # Get all source files in the _sources directory using configured suffixes
             source_suffixes = self._get_source_suffixes()
-            all_source_files: List[Path] = []
+            all_source_files = []
             for src_suffix in source_suffixes:
                 # Avoid duplicate extensions when source_suffix == source_link_suffix
                 if src_suffix == source_link_suffix:
@@ -507,6 +524,7 @@ class LLMSFullManager:
                         filtered_page_order,
                         self.collector.page_titles,
                         total_line_count,
+                        sources_dir,
                     )
                 return
             elif action == "note":
@@ -520,6 +538,7 @@ class LLMSFullManager:
                         filtered_page_order,
                         self.collector.page_titles,
                         total_line_count,
+                        sources_dir,
                     )
                 return
             elif action == "keep":
@@ -538,7 +557,10 @@ class LLMSFullManager:
         if success and self.config.get("llms_txt_file"):
             filtered_page_order = self._filter_ignored_pages(page_order)
             self.writer.write_verbose_info_to_file(
-                filtered_page_order, self.collector.page_titles, total_line_count
+                filtered_page_order,
+                self.collector.page_titles,
+                total_line_count,
+                sources_dir,
             )
 
     def _read_source_file(self, file_path: Path, docname: str) -> Tuple[str, int]:
@@ -735,9 +757,9 @@ class LLMSFullManager:
                                 title = Path(title_str[len(base_path) :])
                     except ValueError:
                         # File is not relative to srcdir, use filename
-                        title = Path(file_path.name)
+                        title = file_path.name
                 else:
-                    title = Path(file_path.name)
+                    title = file_path.name
 
                 # Format as code block with equals underline
                 title_str = str(title)
@@ -769,9 +791,7 @@ class LLMSFullManager:
 
         return code_parts, sorted(processed_files)
 
-    def _create_code_files_section_header(
-        self, file_paths: Optional[List[Path]] = None
-    ) -> str:
+    def _create_code_files_section_header(self, file_paths: List[Path] = None) -> str:
         """Create the section header for source code files.
 
         Args:
@@ -819,7 +839,7 @@ class LLMSFullManager:
             return ""
 
         # Convert to relative paths if possible and create tree structure
-        tree_data: Dict[str, Any] = {}
+        tree_data = {}
 
         for file_path in sorted(file_paths):
             # Get relative path from source directory for display
@@ -872,7 +892,7 @@ class LLMSFullManager:
                 current[parts[-1]] = None  # None indicates it's a file
 
         # Convert tree structure to string representation
-        lines: List[str] = []
+        lines = []
         self._format_tree_node(tree_data, lines, "", True)
 
         # Indent each line for reStructuredText code block

sphinx_llms_txt/processor.py

@@ -130,7 +130,7 @@ class DocumentProcessor:
         """
         # Get the configured path directives to process
         default_path_directives = ["image", "figure"]
-        custom_path_directives = self.config.get("llms_txt_directives") or []
+        custom_path_directives = self.config.get("llms_txt_directives")
         path_directives = set(default_path_directives + custom_path_directives)
 
         # Build the regex pattern to match all configured directives

sphinx_llms_txt/writer.py

@@ -3,7 +3,7 @@ File writer module for sphinx-llms-txt.
 """
 
 from pathlib import Path
-from typing import Any, Dict, List, Optional, Tuple, Union
+from typing import Any, Dict, List, Tuple, Union
 
 from sphinx.application import Sphinx
 from sphinx.util import logging
@@ -14,16 +14,47 @@ logger = logging.getLogger(__name__)
 class FileWriter:
     """Handles writing processed content to output files."""
 
-    def __init__(
-        self,
-        config: Dict[str, Any],
-        outdir: Optional[str] = None,
-        app: Optional[Sphinx] = None,
-    ):
+    def __init__(self, config: Dict[str, Any], outdir: str = None, app: Sphinx = None):
         self.config = config
         self.outdir = outdir
         self.app = app
 
+    def _resolve_uri_template(self, sources_dir: Path = None) -> str:
+        """Resolve which URI template to use based on configuration and sources_dir.
+
+        Args:
+            sources_dir: Path to _sources directory (None if not found)
+
+        Returns:
+            The template string to use for generating URIs
+        """
+        # If custom template exists
+        custom_template = self.config.get("llms_txt_uri_template")
+
+        if custom_template:
+            # Validate user's template by checking for valid variable names
+            try:
+                # Try formatting with test valid values to validate syntax
+                test_values = {
+                    "base_url": "http://example.com/",
+                    "docname": "test",
+                    "suffix": ".rst",
+                    "sourcelink_suffix": ".txt",
+                }
+                custom_template.format(**test_values)
+                return custom_template
+            except (KeyError, ValueError) as e:
+                logger.warning(
+                    f"sphinx-llms-txt: Invalid llms_txt_uri_template: {e}. "
+                    f"Falling back to default."
+                )
+
+        # Else, use one of the default templates
+        if sources_dir:
+            return "{base_url}_sources/{docname}{suffix}{sourcelink_suffix}"
+        else:
+            return "{base_url}{docname}.html"
+
     def write_combined_file(
         self, content_parts: List[str], output_path: Path, total_line_count: int
     ) -> bool:
@@ -52,9 +83,10 @@ class FileWriter:
 
     def write_verbose_info_to_file(
         self,
-        page_order: Union[List[str], List[Tuple[str, Optional[str]]]],
+        page_order: Union[List[str], List[Tuple[str, str]]],
         page_titles: Dict[str, str],
         total_line_count: int = 0,
+        sources_dir: Path = None,
     ) -> bool:
         """Write summary information to the llms.txt file.
 
@@ -62,6 +94,7 @@ class FileWriter:
             page_order: Ordered list of document names or (docname, suffix) tuples
             page_titles: Dictionary mapping docnames to titles
             total_line_count: Total number of lines in the combined content
+            sources_dir: Path to _sources directory (None if not found)
 
         Returns:
             True if successful, False otherwise
@@ -72,13 +105,13 @@ class FileWriter:
             )
             return False
 
-        output_path = Path(self.outdir) / str(self.config.get("llms_txt_filename"))
+        output_path = Path(self.outdir) / self.config.get("llms_txt_filename")
         try:
             with open(output_path, "w", encoding="utf-8") as f:
                 project_name = "llms-txt Summary"
                 # First priority: use title from config if available
                 if self.config.get("llms_txt_title"):
-                    project_name = str(self.config.get("llms_txt_title"))
+                    project_name = self.config.get("llms_txt_title")
                 # Second priority: use project name from Sphinx app if available
                 elif (
                     self.app
@@ -107,14 +140,37 @@ class FileWriter:
                 if not base_url.endswith("/"):
                     base_url += "/"
 
+                # Get sourcelink suffix from Sphinx config
+                sourcelink_suffix = ""
+                if self.app and hasattr(self.app.config, "html_sourcelink_suffix"):
+                    sourcelink_suffix = self.app.config.html_sourcelink_suffix
+                    # Handle empty string case specially
+                    if sourcelink_suffix == "":
+                        sourcelink_suffix = ""  # Keep it empty
+                    elif not sourcelink_suffix.startswith("."):
+                        sourcelink_suffix = "." + sourcelink_suffix
+
+                # Resolve which template to use
+                uri_template = self._resolve_uri_template(sources_dir)
+
                 for item in page_order:
                     # Handle both old format (str) and new format (tuple)
                     if isinstance(item, tuple):
-                        docname, _ = item
+                        docname, suffix = item
                     else:
                         docname = item
+                        suffix = None
+
                     title = page_titles.get(docname, docname)
-                    f.write(f"- [{title}]({base_url}{docname}.html)\n")
+
+                    uri = uri_template.format(
+                        base_url=base_url,
+                        docname=docname,
+                        suffix=suffix or "",
+                        sourcelink_suffix=sourcelink_suffix,
+                    )
+
+                    f.write(f"- [{title}]({uri})\n")
 
             logger.info(f"sphinx-llms-txt: created {output_path}")
             return True

tests/test_llms_txt.py

@@ -41,6 +41,42 @@ def test_setup_returns_valid_dict():
     assert "parallel_write_safe" in result
 
 
+def test_builder_inited_with_disallowed_builder():
+    """Test that disallowed builders do not trigger extension setup."""
+    import sphinx_llms_txt
+
+    # Reset global state
+    sphinx_llms_txt._manager = sphinx_llms_txt.LLMSFullManager()
+    sphinx_llms_txt._root_first_paragraph = ""
+
+    # Mock a Sphinx app with a disallowed builder
+    class MockBuilder:
+        name = "text"  # Not in allowed list
+
+    class MockApp:
+        def __init__(self):
+            self.config_values = {}
+            self.connections = {}
+            self.builder = MockBuilder()
+
+        def add_config_value(self, name, default, rebuild):
+            self.config_values[name] = (default, rebuild)
+
+        def connect(self, event, handler):
+            self.connections[event] = handler
+
+    app = MockApp()
+    setup(app)
+
+    # Trigger builder-inited
+    builder_inited_handler = app.connections["builder-inited"]
+    builder_inited_handler(app)
+
+    # With disallowed builder, other events should NOT be connected
+    assert "doctree-resolved" not in app.connections
+    assert "build-finished" not in app.connections
+
+
 def test_document_collector_initialization():
     """Test initialization of DocumentCollector."""
     collector = DocumentCollector()
@@ -758,6 +794,7 @@ def test_summary_default_uses_first_paragraph():
             llms_txt_summary = None  # Not configured
             llms_txt_file = True
             llms_txt_filename = "llms.txt"
+            llms_txt_uri_template = None
             llms_txt_title = None
             llms_txt_full_file = True
             llms_txt_full_filename = "llms-full.txt"
@@ -995,3 +1032,128 @@ def test_code_files_ignored_patterns(tmp_path, caplog):
     assert (
         "Code file pattern 'docs/**/*.rst' ignored." in captured_warnings[0]
     ), f"Warning message should contain expected text. Got: {captured_warnings[0]}"
+
+
+def test_llms_txt_generated_without_sources_dir(tmp_path):
+    """Test that llms.txt is generated even when _sources directory doesn't exist."""
+
+    from sphinx_llms_txt.manager import LLMSFullManager
+
+    # Create manager
+    manager = LLMSFullManager()
+
+    # Set config to enable llms.txt
+    config = {
+        "llms_txt_file": True,
+        "llms_txt_filename": "llms.txt",
+        "llms_txt_full_file": True,
+        "llms_txt_full_filename": "llms-full.txt",
+        "llms_txt_exclude": [],
+        "llms_txt_directives": [],
+    }
+    manager.set_config(config)
+
+    # Create directories (but no _sources)
+    outdir = tmp_path / "build"
+    srcdir = tmp_path / "source"
+    outdir.mkdir()
+    srcdir.mkdir()
+
+    # Mock env with documents
+    class MockEnv:
+        all_docs = {"index": None, "about": None}
+        titles = {
+            "index": type("TitleNode", (), {"astext": lambda self: "Home"})(),
+            "about": type("TitleNode", (), {"astext": lambda self: "About"})(),
+        }
+        toctree_includes = {"index": ["about"]}
+
+    manager.set_env(MockEnv())
+    manager.set_master_doc("index")
+
+    # Update page titles directly in the collector
+    manager.update_page_title("index", "Home")
+    manager.update_page_title("about", "About")
+
+    # Call combine_sources - should generate llms.txt even without _sources
+    manager.combine_sources(str(outdir), str(srcdir))
+
+    # Verify llms.txt was created
+    llms_txt = outdir / "llms.txt"
+    assert llms_txt.exists(), "llms.txt should be generated even without _sources"
+
+    # Verify llms-full.txt was NOT created (since no _sources)
+    llms_full_txt = outdir / "llms-full.txt"
+    assert (
+        not llms_full_txt.exists()
+    ), "llms-full.txt should not be generated without _sources"
+
+    # Read llms.txt and verify it has content
+    with open(llms_txt, "r", encoding="utf-8") as f:
+        content = f.read()
+
+    # Should contain page titles and links
+    assert "Home" in content
+    assert "About" in content
+    assert "index.html" in content
+    assert "about.html" in content
+
+
+def test_llms_txt_no_warning_when_full_file_disabled(tmp_path, caplog):
+    """
+    Test that no warning is logged when llms_txt_full_file=False and
+    _sources doesn't exist.
+    """
+    from unittest.mock import patch
+
+    from sphinx_llms_txt.manager import LLMSFullManager
+
+    # Create manager
+    manager = LLMSFullManager()
+
+    # Set config with llms_txt_full_file=False
+    config = {
+        "llms_txt_file": True,
+        "llms_txt_filename": "llms.txt",
+        "llms_txt_full_file": False,  # User doesn't want llms-full.txt
+        "llms_txt_full_filename": "llms-full.txt",
+        "llms_txt_exclude": [],
+        "llms_txt_directives": [],
+    }
+    manager.set_config(config)
+
+    # Create directories (but no _sources)
+    outdir = tmp_path / "build"
+    srcdir = tmp_path / "source"
+    outdir.mkdir()
+    srcdir.mkdir()
+
+    # Mock env with documents
+    class MockEnv:
+        all_docs = {"index": None}
+        titles = {"index": type("TitleNode", (), {"astext": lambda self: "Home"})()}
+        toctree_includes = {"index": []}
+
+    manager.set_env(MockEnv())
+    manager.set_master_doc("index")
+    manager.update_page_title("index", "Home")
+
+    # Capture warnings
+    captured_warnings = []
+
+    def capture_warning(message, *args, **kwargs):
+        if "_sources" in str(message):
+            captured_warnings.append(message)
+
+    with patch("sphinx_llms_txt.manager.logger.warning", side_effect=capture_warning):
+        # Call combine_sources
+        manager.combine_sources(str(outdir), str(srcdir))
+
+    # Verify NO warning was logged since llms_txt_full_file=False
+    assert (
+        len(captured_warnings) == 0
+    ), "No warning should be logged when llms_txt_full_file=False"
+
+    # Verify llms.txt was still created
+    llms_txt = outdir / "llms.txt"
+    assert llms_txt.exists()

tests/test_uri_template.py

@@ -0,0 +1,175 @@
+"""Test URI template functionality for llms.txt links."""
+
+from sphinx_llms_txt import FileWriter
+
+
+def test_uri_template_with_sources_dir(tmp_path):
+    """Test that default template uses _sources links when sources_dir exists."""
+    build_dir = tmp_path / "build"
+    build_dir.mkdir()
+
+    # Create _sources directory to simulate its existence
+    sources_dir = build_dir / "_sources"
+    sources_dir.mkdir()
+
+    # Mock app with html_sourcelink_suffix
+    class MockApp:
+        class Config:
+            html_sourcelink_suffix = ".txt"
+
+        config = Config()
+
+    config = {
+        "llms_txt_file": True,
+        "llms_txt_filename": "llms.txt",
+        "llms_txt_uri_template": (
+            "{base_url}_sources/{docname}{suffix}{sourcelink_suffix}"
+        ),
+        "html_baseurl": "https://example.com",
+    }
+    writer = FileWriter(config, str(build_dir), MockApp())
+
+    page_titles = {
+        "index": "Home Page",
+        "about": "About Us",
+    }
+
+    # Page order with suffixes (simulating _sources files exist)
+    page_order = [("index", ".rst"), ("about", ".md")]
+
+    writer.write_verbose_info_to_file(page_order, page_titles, 0, sources_dir)
+
+    # Check that the file was created
+    verbose_file = build_dir / "llms.txt"
+    assert verbose_file.exists()
+
+    # Read the file content
+    with open(verbose_file, "r", encoding="utf-8") as f:
+        content = f.read()
+
+    # Should link to _sources files
+    assert "- [Home Page](https://example.com/_sources/index.rst.txt)" in content
+    assert "- [About Us](https://example.com/_sources/about.md.txt)" in content
+
+
+def test_uri_template_without_sources_dir(tmp_path):
+    """
+    Test that HTML template is used when sources_dir doesn't exist and no custom
+    template.
+    """
+    build_dir = tmp_path / "build"
+    build_dir.mkdir()
+
+    config = {
+        "llms_txt_file": True,
+        "llms_txt_filename": "llms.txt",
+        # No custom template set
+        "html_baseurl": "https://example.com",
+    }
+    writer = FileWriter(config, str(build_dir))
+
+    page_titles = {
+        "index": "Home Page",
+        "about": "About Us",
+    }
+
+    # Page order without suffixes (simulating no _sources)
+    page_order = [("index", None), ("about", None)]
+
+    # Pass None for sources_dir to simulate it doesn't exist
+    writer.write_verbose_info_to_file(page_order, page_titles, 0, None)
+
+    # Check that the file was created
+    verbose_file = build_dir / "llms.txt"
+    assert verbose_file.exists()
+
+    # Read the file content
+    with open(verbose_file, "r", encoding="utf-8") as f:
+        content = f.read()
+
+    # Should fallback to HTML links
+    assert "- [Home Page](https://example.com/index.html)" in content
+    assert "- [About Us](https://example.com/about.html)" in content
+
+
+def test_uri_template_custom(tmp_path):
+    """Test that custom URI template works correctly."""
+    build_dir = tmp_path / "build"
+    build_dir.mkdir()
+
+    sources_dir = build_dir / "_sources"
+    sources_dir.mkdir()
+
+    # Mock app with html_sourcelink_suffix
+    class MockApp:
+        class Config:
+            html_sourcelink_suffix = ".txt"
+
+        config = Config()
+
+    # Custom template that uses different path
+    config = {
+        "llms_txt_file": True,
+        "llms_txt_filename": "llms.txt",
+        "llms_txt_uri_template": "{base_url}raw/{docname}{suffix}",
+        "html_baseurl": "https://example.com/",
+    }
+    writer = FileWriter(config, str(build_dir), MockApp())
+
+    page_titles = {
+        "index": "Home Page",
+    }
+
+    page_order = [("index", ".rst")]
+
+    writer.write_verbose_info_to_file(page_order, page_titles, 0, sources_dir)
+
+    verbose_file = build_dir / "llms.txt"
+    with open(verbose_file, "r", encoding="utf-8") as f:
+        content = f.read()
+
+    # Should use custom template
+    assert "- [Home Page](https://example.com/raw/index.rst)" in content
+
+
+def test_uri_template_invalid_fallback(tmp_path):
+    """
+    Test that invalid template falls back to default sources template when
+    sources_dir exists.
+    """
+    build_dir = tmp_path / "build"
+    build_dir.mkdir()
+
+    sources_dir = build_dir / "_sources"
+    sources_dir.mkdir()
+
+    # Mock app with html_sourcelink_suffix
+    class MockApp:
+        class Config:
+            html_sourcelink_suffix = ".txt"
+
+        config = Config()
+
+    # Invalid template with typo in variable name
+    config = {
+        "llms_txt_file": True,
+        "llms_txt_filename": "llms.txt",
+        "llms_txt_uri_template": "{base_urll}/{docname}",
+        "html_baseurl": "https://example.com",
+    }
+    writer = FileWriter(config, str(build_dir), MockApp())
+
+    page_titles = {
+        "index": "Home Page",
+    }
+
+    page_order = [("index", ".rst")]
+
+    writer.write_verbose_info_to_file(page_order, page_titles, 0, sources_dir)
+
+    verbose_file = build_dir / "llms.txt"
+    with open(verbose_file, "r", encoding="utf-8") as f:
+        content = f.read()
+
+    # Should fallback to default sources template
+    assert "- [Home Page](https://example.com/_sources/index.rst.txt)" in content