diff --git a/.mise.toml b/.mise.toml
index 1457634..5b2afe7 100644
--- a/.mise.toml
+++ b/.mise.toml
@@ -1,3 +1,4 @@
 [tools]
 lefthook = "latest"
+task = "latest"
 uv = "latest"
diff --git a/Taskfile.yaml b/Taskfile.yaml
new file mode 100644
index 0000000..b078bc3
--- /dev/null
+++ b/Taskfile.yaml
@@ -0,0 +1,37 @@
+version: '3'
+
+vars:
+  # If you run bare environment or activated venv, set '' (blank string)
+  RUN_PYTHON: 'uv run'
+
+tasks:
+  setup:
+    desc: 'Setup workspace'
+    cmds:
+      - 'uv sync --frozen --all-extras'
+      - 'lefthook install'
+      - task: 'docs:apidoc'
+  verify:
+    desc: 'Verify environment by all procs'
+    cmds:
+      - 'lefthook run pre-commit --all-files'
+      - '{{.RUN_PYTHON}} pytest'
+      - task: 'docs:intl'
+      - task: 'docs:apidoc'
+      - task: 'docs:build-linkcheck'
+      - task: 'docs:build-dirhtml'
+      - task: 'demo:intl'
+      - task: 'docs:build-linkcheck'
+      - task: 'demo:build'
+      - 'uv build'
+  release-*:
+    desc: 'Run release process'
+    vars:
+      VERSION: '{{index .MATCH 0}}'
+    cmds:
+      - 'age update {{.VERSION}}'
+      - 'uv sync --all-extras'  # To write out as lock-file
+
+includes:
+  docs: './doc'
+  demo: './demo'
diff --git a/demo/Taskfile.yaml b/demo/Taskfile.yaml
new file mode 100644
index 0000000..3e6b8ae
--- /dev/null
+++ b/demo/Taskfile.yaml
@@ -0,0 +1,46 @@
+version: '3'
+
+vars:
+  # If you run bare environment or activated venv, set '' (blank string)
+  # RUN_PYTHON: ''
+  SPHINX_DEFAULT_BUILD: 'mini18n-dirrevealjs'
+  SPHINX_SOURCE_DIR: '.'
+  SPHINX_OUTPUT_DIR: '_build'
+  SPHINX_OPTIONS: ''
+  SPHINX_LANGUAGES:
+    - 'ja'
+
+env:
+  SPHINXINTL_TRANSLATOR: "Kazuya Takei <myself@attakei.net>"
+
+tasks:
+  intl:
+    desc: 'Sync i18n environment'
+    dir: '{{.TASKFILE_DIR}}'
+    cmds:
+      - '{{.RUN_PYTHON}} sphinx-build -M gettext {{.SPHINX_SOURCE_DIR}} {{.SPHINX_OUTPUT_DIR}} {{.SPHINX_OPTIONS}}'
+      - '{{.RUN_PYTHON}} sphinx-intl update --language={{.SPHINX_LANGUAGES | join ","}}'
+  dev:
+    desc: 'Run docs server'
+    dir: '{{.TASKFILE_DIR}}'
+    cmds:
+      - '{{.RUN_PYTHON}} sphinx-autobuild -b dirrevealjs {{.SPHINX_SOURCE_DIR}} {{.SPHINX_OUTPUT_DIR}}/dirrevealjs'
+  build-*:
+    desc: 'Make docs'
+    dir: '{{.TASKFILE_DIR}}'
+    vars:
+      TARGET: '{{index .MATCH 0}}'
+    cmds:
+      - '{{.RUN_PYTHON}} sphinx-build -M {{.TARGET}} {{.SPHINX_SOURCE_DIR}} {{.SPHINX_OUTPUT_DIR}}'
+  build:
+    desc: 'Make docs (default target)'
+    deps:
+      - 'build-{{.SPHINX_DEFAULT_BUILD}}'
+  help:
+    desc: 'Display help of docs'
+    deps:
+      - 'build-help'
+  clean:
+    desc: 'Clean build files of docs'
+    deps:
+      - 'build-clean'
diff --git a/doc/Taskfile.yaml b/doc/Taskfile.yaml
new file mode 100644
index 0000000..74fdbac
--- /dev/null
+++ b/doc/Taskfile.yaml
@@ -0,0 +1,52 @@
+version: '3'
+
+vars:
+  # If you run bare environment or activated venv, set '' (blank string)
+  # RUN_PYTHON: ''
+  SPHINX_DEFAULT_BUILD: 'dirhtml'
+  SPHINX_SOURCE_DIR: '.'
+  SPHINX_OUTPUT_DIR: '_build'
+  SPHINX_OPTIONS: ''
+  SPHINX_LANGUAGES:
+    - 'ja'
+
+env:
+  SPHINXINTL_TRANSLATOR: "Kazuya Takei <myself@attakei.net>"
+
+tasks:
+  intl:
+    desc: 'Sync i18n environment'
+    dir: '{{.TASKFILE_DIR}}'
+    cmds:
+      - '{{.RUN_PYTHON}} sphinx-build -M gettext {{.SPHINX_SOURCE_DIR}} {{.SPHINX_OUTPUT_DIR}} {{.SPHINX_OPTIONS}}'
+      - '{{.RUN_PYTHON}} sphinx-intl update --language={{.SPHINX_LANGUAGES | join ","}}'
+  dev:
+    desc: 'Run docs server'
+    dir: '{{.TASKFILE_DIR}}'
+    cmds:
+      - '{{.RUN_PYTHON}} sphinx-autobuild -b dirhtml {{.SPHINX_SOURCE_DIR}} {{.SPHINX_OUTPUT_DIR}}/dirhtml'
+  apidoc:
+    desc: 'Update apidoc'
+    dir: '{{.TASKFILE_DIR}}'
+    cmds:
+      - 'rm -rf api'
+      - '{{.RUN_PYTHON}} sphinx-apidoc -f -e -T -o=api/ ../sphinx_revealjs'
+  build-*:
+    desc: 'Make docs'
+    dir: '{{.TASKFILE_DIR}}'
+    vars:
+      TARGET: '{{index .MATCH 0}}'
+    cmds:
+      - '{{.RUN_PYTHON}} sphinx-build -M {{.TARGET}} {{.SPHINX_SOURCE_DIR}} {{.SPHINX_OUTPUT_DIR}}'
+  build:
+    desc: 'Make docs (default target)'
+    deps:
+      - 'build-{{.SPHINX_DEFAULT_BUILD}}'
+  help:
+    desc: 'Display help of docs'
+    deps:
+      - 'build-help'
+  clean:
+    desc: 'Clean build files of docs'
+    deps:
+      - 'build-clean'
diff --git a/doc/conf.py b/doc/conf.py
index 8117434..6395140 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -72,6 +72,15 @@
 epub_title = project
 epub_exclude_files = ["search.html"]
 
+# -- Options for Linkcheck output
+linkcheck_ignore = [
+    r"./docs/migrations",  # TODO: Fix after.
+    # TODO: Migrate ``linkcheck_anchors_ignore_for_url``
+    r"https://attakei.github.io/sphinx-revealjs/en/#/5/1",
+    r"https://revealjs.com/#/",
+    r"https://revealjs.com/code/#line-numbers-%26-highlights",
+]
+
 # -- Extension configuration -------------------------------------------------
 # For sphinx.ext.intersphinx
 intersphinx_mapping = {