Port site to Responder (#8)

* Initial Responder port — core content serving working

Homepage, markdown pages, directory listings, image galleries
all rendering. Flask template compatibility via RequestWrapper
and FakeConfig shims.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* Complete Responder port — all routes working

Ported all routes from Flask blueprints: archive, search, OG images,
RSS, sitemap, robots.txt, API endpoints, directory browser.
All 25+ routes returning 200.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* Update Dockerfile for Responder, warm caches on import

CMD now runs engine_responder:api via uvicorn.
Cache warming happens on module import for production.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* Rename engine_responder.py to engine.py

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* Update colophon for Responder

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* Fix essay pages, OG images, and PDF export

- Fix find_related_posts and find_adjacent_posts call signatures
- Fix OG image route to use path:path for nested paths
- Add PDF export route with WeasyPrint
- All test plan items passing

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Dockerfile

@@ -27,4 +27,4 @@ RUN uv pip install . --system
 COPY . .
 
 # Run uvicorn directly (no need for uv run since we installed system-wide)
-CMD ["uvicorn", "engine:app", "--host", "0.0.0.0", "--port", "8000"]
+CMD ["uvicorn", "engine:api", "--host", "0.0.0.0", "--port", "8000"]

data/colophon.md

@@ -4,7 +4,7 @@ This site is mine. My words, my domain, my infrastructure. After eighteen years
 
 ## The Stack
 
-- **Framework:** A custom Flask CMS called TufteCMS, purpose-built for this site.
+- **Framework:** [Responder](https://github.com/kennethreitz/responder), my own Python web framework, with a custom CMS layer called TufteCMS.
 - **Typography:** Tufte CSS. Edward Tufte understood that margins are for thinking.
 - **Content:** Markdown files in a directory. No database. Just files.
 - **Hosting:** Fly.io.
@@ -40,7 +40,8 @@ This site has been:
 - Ghost (2013-2015)
 - Medium (briefly, regrettably)
 - Squarespace (2016-2023)
-- Custom TufteCMS on Flask (2024-present)
+- Custom TufteCMS on Flask (2024-2026)
+- Custom TufteCMS on [Responder](/software/responder) (2026-present)
 
 Every migration taught me the same lesson: platforms come and go, but your own domain is forever.
 

pyproject.toml

@@ -13,6 +13,7 @@ dependencies = [
     "weasyprint>=66.0",
     "pillow>=11.3.0",
     "gunicorn[gevent]>=21.0.0",
+    "responder>=3.2.0",
 ]
 authors = [
     {name = "Kenneth Reitz", email = "me@kennethreitz.org"}