71 files changed, 443 insertions, 614 deletions
diff --git a/src/content/en/about.adoc b/src/content/en/about.adoc
index 9911496..14d5e22 100644
--- a/src/content/en/about.adoc
+++ b/src/content/en/about.adoc
@@ -3,7 +3,7 @@
 :mailto:  mailto:~euandreh/public-inbox@lists.sr.ht
 :archive: https://lists.sr.ht/~euandreh/public-inbox
 
-Hi, I'm EuAndreh.  I write software and occasionally music.  You can find my
+Hi, I'm EuAndreh.  I write software and, occasionally, music.  You can find my
 contact information in the footer of this page, or mail my {mailto}[public
 inbox] ({archive}[archive]).
 
diff --git a/src/content/en/blog/2020/10/19/feature-flags.adoc b/src/content/en/blog/2020/10/19/feature-flags.adoc
index 972f693..8788407 100644
--- a/src/content/en/blog/2020/10/19/feature-flags.adoc
+++ b/src/content/en/blog/2020/10/19/feature-flags.adoc
@@ -3,7 +3,7 @@
 :updatedat: 2020-11-03
 
 :empty:
-:slides: link:../../../../slides/2020/10/19/feature-flags.html FIXME
+:slides: link:../../../../slide/2020/10/19/feature-flags.pdf
 :fowler-article: https://martinfowler.com/articles/feature-toggles.html
 
 _This article is derived from a {slides}[presentation] on the same subject._
diff --git a/src/content/en/blog/2020/11/07/diy-bugs.adoc b/src/content/en/blog/2020/11/07/diy-bugs.adoc
index 8ab7953..5fbc920 100644
--- a/src/content/en/blog/2020/11/07/diy-bugs.adoc
+++ b/src/content/en/blog/2020/11/07/diy-bugs.adoc
@@ -4,7 +4,7 @@
 :attack-on-ytdl: https://github.com/github/dmca/blob/master/2020/10/2020-10-23-RIAA.md
 :list-discussions: https://sourcehut.org/blog/2020-10-29-how-mailing-lists-prevent-censorship/
 :docs-in-repo: https://podcast.writethedocs.org/2017/01/25/episode-3-trends/
-:ci-in-notes: link:../../../../tils/2020/11/30/git-notes-ci.html
+:ci-in-notes: link:../../../../til/2020/11/30/git-notes-ci.html
 :todos-mui: https://man.sr.ht/todo.sr.ht/#email-access
 :git-bug-bridges: https://github.com/MichaelMure/git-bug#bridges
 
diff --git a/src/content/en/blog/2020/11/14/local-first-review.adoc b/src/content/en/blog/2020/11/14/local-first-review.adoc
index f9dd4b0..2036069 100644
--- a/src/content/en/blog/2020/11/14/local-first-review.adoc
+++ b/src/content/en/blog/2020/11/14/local-first-review.adoc
@@ -2,7 +2,7 @@
 :categories: presentation article-review
 
 :empty:
-:presentation: link:../../../../slides/2020/11/14/local-first.html FIXME
+:presentation: link:../../../../slide/2020/11/14/local-first-hype.pdf
 :reviewed-article: https://martin.kleppmann.com/papers/local-first.pdf
 
 _This article is derived from a {presentation}[presentation] given at a Papers
diff --git a/src/content/en/blog/categories.adoc b/src/content/en/blog/categories.adoc
index f29acda..feb64ff 100644
--- a/src/content/en/blog/categories.adoc
+++ b/src/content/en/blog/categories.adoc
@@ -1 +1,2 @@
 = Articles by category
+:type: categories
diff --git a/src/content/en/pastebins/2016/04/05/rpn.adoc b/src/content/en/pastebin/2016/04/05/rpn.adoc
index c567d0d..c567d0d 100644
--- a/src/content/en/pastebins/2016/04/05/rpn.adoc
+++ b/src/content/en/pastebin/2016/04/05/rpn.adoc
diff --git a/src/content/en/pastebins/2018/07/11/nix-pinning.adoc b/src/content/en/pastebin/2018/07/11/nix-pinning.adoc
index 63b1ac9..63b1ac9 100644
--- a/src/content/en/pastebins/2018/07/11/nix-pinning.adoc
+++ b/src/content/en/pastebin/2018/07/11/nix-pinning.adoc
diff --git a/src/content/en/pastebins/2018/07/13/guix-nixos-systemd.adoc b/src/content/en/pastebin/2018/07/13/guix-nixos-systemd.adoc
index fa4226a..fa4226a 100644
--- a/src/content/en/pastebins/2018/07/13/guix-nixos-systemd.adoc
+++ b/src/content/en/pastebin/2018/07/13/guix-nixos-systemd.adoc
diff --git a/src/content/en/pastebins/2018/07/13/guixbuilder-nixos.adoc b/src/content/en/pastebin/2018/07/13/guixbuilder-nixos.adoc
index 65dbcc7..65dbcc7 100644
--- a/src/content/en/pastebins/2018/07/13/guixbuilder-nixos.adoc
+++ b/src/content/en/pastebin/2018/07/13/guixbuilder-nixos.adoc
diff --git a/src/content/en/pastebins/2018/07/13/guixbuilder.adoc b/src/content/en/pastebin/2018/07/13/guixbuilder.adoc
index 35057f9..35057f9 100644
--- a/src/content/en/pastebins/2018/07/13/guixbuilder.adoc
+++ b/src/content/en/pastebin/2018/07/13/guixbuilder.adoc
diff --git a/src/content/en/pastebins/2018/07/13/nix-strpad.adoc b/src/content/en/pastebin/2018/07/13/nix-strpad.adoc
index 71e8168..71e8168 100644
--- a/src/content/en/pastebins/2018/07/13/nix-strpad.adoc
+++ b/src/content/en/pastebin/2018/07/13/nix-strpad.adoc
diff --git a/src/content/en/pastebins/2018/07/25/nix-exps.adoc b/src/content/en/pastebin/2018/07/25/nix-exps.adoc
index 04cb7f4..04cb7f4 100644
--- a/src/content/en/pastebins/2018/07/25/nix-exps.adoc
+++ b/src/content/en/pastebin/2018/07/25/nix-exps.adoc
diff --git a/src/content/en/pastebins/2018/07/25/nix-showdrv.adoc b/src/content/en/pastebin/2018/07/25/nix-showdrv.adoc
index b62e526..b62e526 100644
--- a/src/content/en/pastebins/2018/07/25/nix-showdrv.adoc
+++ b/src/content/en/pastebin/2018/07/25/nix-showdrv.adoc
diff --git a/src/content/en/pastebins/2019/06/08/inconsistent-hash.adoc b/src/content/en/pastebin/2019/06/08/inconsistent-hash.adoc
index 8dc5794..8dc5794 100644
--- a/src/content/en/pastebins/2019/06/08/inconsistent-hash.adoc
+++ b/src/content/en/pastebin/2019/06/08/inconsistent-hash.adoc
diff --git a/src/content/en/pastebins/2019/12/29/raku-tuple-type.adoc b/src/content/en/pastebin/2019/12/29/raku-tuple-type.adoc
index 50dd841..50dd841 100644
--- a/src/content/en/pastebins/2019/12/29/raku-tuple-type.adoc
+++ b/src/content/en/pastebin/2019/12/29/raku-tuple-type.adoc
diff --git a/src/content/en/pastebins/2020/01/04/guix-import-failure.adoc b/src/content/en/pastebin/2020/01/04/guix-import-failure.adoc
index 5896645..5896645 100644
--- a/src/content/en/pastebins/2020/01/04/guix-import-failure.adoc
+++ b/src/content/en/pastebin/2020/01/04/guix-import-failure.adoc
diff --git a/src/content/en/pastebins/2020/02/14/guix-shebang.adoc b/src/content/en/pastebin/2020/02/14/guix-shebang.adoc
index d415d36..d415d36 100644
--- a/src/content/en/pastebins/2020/02/14/guix-shebang.adoc
+++ b/src/content/en/pastebin/2020/02/14/guix-shebang.adoc
diff --git a/src/content/en/pastebins/2020/11/27/guix-build-local.adoc b/src/content/en/pastebin/2020/11/27/guix-build-local.adoc
index 1a18d4b..1a18d4b 100644
--- a/src/content/en/pastebins/2020/11/27/guix-build-local.adoc
+++ b/src/content/en/pastebin/2020/11/27/guix-build-local.adoc
diff --git a/src/content/en/pastebins/2020/12/15/guix-pack-fail.adoc b/src/content/en/pastebin/2020/12/15/guix-pack-fail.adoc
index 3631fbc..3631fbc 100644
--- a/src/content/en/pastebins/2020/12/15/guix-pack-fail.adoc
+++ b/src/content/en/pastebin/2020/12/15/guix-pack-fail.adoc
diff --git a/src/content/en/pastebins/2021/04/03/naive-slugify-js.adoc b/src/content/en/pastebin/2021/04/03/naive-slugify-js.adoc
index 184ce97..184ce97 100644
--- a/src/content/en/pastebins/2021/04/03/naive-slugify-js.adoc
+++ b/src/content/en/pastebin/2021/04/03/naive-slugify-js.adoc
diff --git a/src/content/en/pastebins/2021/06/08/reading-session-pt1.adoc b/src/content/en/pastebin/2021/06/08/reading-session-pt1.adoc
index d9f1f91..d9f1f91 100644
--- a/src/content/en/pastebins/2021/06/08/reading-session-pt1.adoc
+++ b/src/content/en/pastebin/2021/06/08/reading-session-pt1.adoc
diff --git a/src/content/en/pastebins/2021/06/22/curl-wget.adoc b/src/content/en/pastebin/2021/06/22/curl-wget.adoc
index 97f55c7..97f55c7 100644
--- a/src/content/en/pastebins/2021/06/22/curl-wget.adoc
+++ b/src/content/en/pastebin/2021/06/22/curl-wget.adoc
diff --git a/src/content/en/pastebins/2021/08/11/h1-spacing.adoc b/src/content/en/pastebin/2021/08/11/h1-spacing.adoc
index 38dbb2e..38dbb2e 100644
--- a/src/content/en/pastebins/2021/08/11/h1-spacing.adoc
+++ b/src/content/en/pastebin/2021/08/11/h1-spacing.adoc
diff --git a/src/content/en/pastebins/2021/09/02/sicp-3-19.adoc b/src/content/en/pastebin/2021/09/02/sicp-3-19.adoc
index 166170f..166170f 100644
--- a/src/content/en/pastebins/2021/09/02/sicp-3-19.adoc
+++ b/src/content/en/pastebin/2021/09/02/sicp-3-19.adoc
diff --git a/src/content/en/pastebins/2021/09/03/sicp-persistent-queue.adoc b/src/content/en/pastebin/2021/09/03/sicp-persistent-queue.adoc
index 2b4a8a2..2b4a8a2 100644
--- a/src/content/en/pastebins/2021/09/03/sicp-persistent-queue.adoc
+++ b/src/content/en/pastebin/2021/09/03/sicp-persistent-queue.adoc
diff --git a/src/content/en/pastebins/2022/07/14/git-cleanup.adoc b/src/content/en/pastebin/2022/07/14/git-cleanup.adoc
index b223f86..b223f86 100644
--- a/src/content/en/pastebins/2022/07/14/git-cleanup.adoc
+++ b/src/content/en/pastebin/2022/07/14/git-cleanup.adoc
diff --git a/src/content/en/pastebins/2023/07/22/funcallable-amop.adoc b/src/content/en/pastebin/2023/07/22/funcallable-amop.adoc
index 47a8089..47a8089 100644
--- a/src/content/en/pastebins/2023/07/22/funcallable-amop.adoc
+++ b/src/content/en/pastebin/2023/07/22/funcallable-amop.adoc
diff --git a/src/content/en/pastebins/categories.adoc b/src/content/en/pastebin/categories.adoc
index f29acda..feb64ff 100644
--- a/src/content/en/pastebins/categories.adoc
+++ b/src/content/en/pastebin/categories.adoc
@@ -1 +1,2 @@
 = Articles by category
+:type: categories
diff --git a/src/content/en/pastebins/index.adoc b/src/content/en/pastebin/index.adoc
index 433a2c1..433a2c1 100644
--- a/src/content/en/pastebins/index.adoc
+++ b/src/content/en/pastebin/index.adoc
diff --git a/src/content/en/podcasts/2020/12/19/test-entry.adoc b/src/content/en/podcast/2020/12/19/test-entry.adoc
index 9e7eb00..9e7eb00 100644
--- a/src/content/en/podcasts/2020/12/19/test-entry.adoc
+++ b/src/content/en/podcast/2020/12/19/test-entry.adoc
diff --git a/src/content/en/podcasts/2020/12/19/test-entry.flac b/src/content/en/podcast/2020/12/19/test-entry.flac
index 786ab59..786ab59 100644
--- a/src/content/en/podcasts/2020/12/19/test-entry.flac
+++ b/src/content/en/podcast/2020/12/19/test-entry.flac
diff --git a/src/content/en/podcasts/2020/12/19/test-entry.ogg b/src/content/en/podcast/2020/12/19/test-entry.ogg
index 9bf5500..9bf5500 100644
--- a/src/content/en/podcasts/2020/12/19/test-entry.ogg
+++ b/src/content/en/podcast/2020/12/19/test-entry.ogg
diff --git a/src/content/en/screencasts/categories.adoc b/src/content/en/podcast/categories.adoc
index f29acda..feb64ff 100644
--- a/src/content/en/screencasts/categories.adoc
+++ b/src/content/en/podcast/categories.adoc
@@ -1 +1,2 @@
 = Articles by category
+:type: categories
diff --git a/src/content/en/podcasts/index.adoc b/src/content/en/podcast/index.adoc
index 1f17da7..1f17da7 100644
--- a/src/content/en/podcasts/index.adoc
+++ b/src/content/en/podcast/index.adoc
diff --git a/src/content/en/podcasts/2020/12/19/test-entry.flac.torrent b/src/content/en/podcasts/2020/12/19/test-entry.flac.torrent
deleted file mode 100644
index 519fb2f..0000000
--- a/src/content/en/podcasts/2020/12/19/test-entry.flac.torrent
+++ /dev/null
diff --git a/src/content/en/podcasts/2020/12/19/test-entry.ogg.torrent b/src/content/en/podcasts/2020/12/19/test-entry.ogg.torrent
deleted file mode 100644
index 901eac3..0000000
--- a/src/content/en/podcasts/2020/12/19/test-entry.ogg.torrent
+++ /dev/null
@@ -1 +0,0 @@
-d10:created by13:mktorrent 1.14:infod6:lengthi97060e12:x_cross_seed42:mktorrent-9934A4BD4BF787E1BD685FCE62C6057A4:name14:test-entry.ogg12:piece lengthi32768e6:pieces60:dT�K�f^�Q_e��]O��I}P�G�+'wg��/�2��Ҥ����p_y�_��6�!�S�<e8:url-list57:https://euandre.org/en/podcasts/2020/12/19/test-entry.ogge
-\ No newline at end of file
diff --git a/src/content/en/screencasts/2021/02/07/autoqemu.adoc b/src/content/en/screencast/2021/02/07/autoqemu.adoc
index b20b092..b20b092 100644
--- a/src/content/en/screencasts/2021/02/07/autoqemu.adoc
+++ b/src/content/en/screencast/2021/02/07/autoqemu.adoc
diff --git a/src/content/en/screencasts/2021/02/07/autoqemu.tar.gz b/src/content/en/screencast/2021/02/07/autoqemu.tar.gz
index c2fa042..c2fa042 100644
--- a/src/content/en/screencasts/2021/02/07/autoqemu.tar.gz
+++ b/src/content/en/screencast/2021/02/07/autoqemu.tar.gz
diff --git a/src/content/en/screencasts/2021/02/07/autoqemu.webm b/src/content/en/screencast/2021/02/07/autoqemu.webm
index f553efb..f553efb 100644
--- a/src/content/en/screencasts/2021/02/07/autoqemu.webm
+++ b/src/content/en/screencast/2021/02/07/autoqemu.webm
diff --git a/src/content/en/tils/categories.adoc b/src/content/en/screencast/categories.adoc
index f29acda..feb64ff 100644
--- a/src/content/en/tils/categories.adoc
+++ b/src/content/en/screencast/categories.adoc
@@ -1 +1,2 @@
 = Articles by category
+:type: categories
diff --git a/src/content/en/screencasts/index.adoc b/src/content/en/screencast/index.adoc
index 083adac..083adac 100644
--- a/src/content/en/screencasts/index.adoc
+++ b/src/content/en/screencast/index.adoc
diff --git a/src/content/en/screencasts/2021/02/07/autoqemu.webm.torrent b/src/content/en/screencasts/2021/02/07/autoqemu.webm.torrent
deleted file mode 100644
index 24bfe73..0000000
--- a/src/content/en/screencasts/2021/02/07/autoqemu.webm.torrent
+++ /dev/null
diff --git a/src/content/en/slide/2020/10/19/feature-flags.adoc b/src/content/en/slide/2020/10/19/feature-flags.adoc
new file mode 100644
index 0000000..553cf4c
--- /dev/null
+++ b/src/content/en/slide/2020/10/19/feature-flags.adoc
@@ -0,0 +1,230 @@
+---
+# Rollout, feature flag, experiment, operational toggle
+
+@Different use cases for backend, frontend and mobile 
+
+---
+.
+.
+.
+# "Feature flags" tend to come up when talking about continuous deployment
+
+---
+.
+.
+.
+.
+@CI: continuous integration
+.
+@CD: continuous delivery
+.
+@CD: continuous deployment
+
+---
+## Types
+.
+.
+.
+1. rollout
+2. feature flag
+3. experiment
+4. operational toggle
+
+% {favicon.svg}
+---
+## Rollout
+
+# For *rolling out* a new version of software
+
+Short-lived using percentages
+
+% FIXME: links
+- a new deployment of kubernetes
+- new APK released to the Play Store
+
+---
+## Feature flag
+
+# For turning a feature *on* or *off* 
+
+Medium-lived using allow list, A/B test, percentage, app version, etc.
+
+- :new-chargeback-flow
+- :new-debit-card-activation-screen
+
+---
+## Experiment
+
+# For analysing behaviour
+
+Medium-lived using allow list and A/B test
+
+- :debit-withdrawal-test
+
+---
+## Operational toggle
+
+# For disabling features in #crash-like situations
+
+Long-lived using percentage
+
+- :bank-barcode-payment
+- :savings-bank-barcode-query-provider
+
+---
+.
+.
+@We know know about the types
+# But they have different relevance for backend, frontend and mobile
+
+---
+## backend
+.
+.
+1. rollout: k8s blue/green, canary and ~common-rollout~ common-xp
+2. feature flag: ~common-rollout~ common-xp and datasets
+3. experiment: common-xp
+4. operational toggle: ~common-rollout~ common-xp 
+
+---
+## frontend
+.
+.
+1. rollout: CDN and page refreshes
+2. feature flag: percentages and maybe IPs (no :customer/id on the website)
+3. experiment: via dynamic backend control
+4. operational toggle: via dynamic backend control 
+
+---
+## backend
+.
+.
+1. rollout: app stores
+2. feature flag: via dynamic backend control
+3. experiment: via dynamic backend control
+4. operational toggle: via dynamic backend control 
+
+---
+.
+.
+@Key differentiator is
+# how much *control* we have over the environment
+
+---
+## backend
+# full control
+% FIXME: emoji
+% 🎉
+
+---
+## frontend
+# partial control
+We choose when to make a new version available 
+
+---
+## mobile
+# very limited control
+- app stores can restrict updates (worse for iOS)
+- customers still have to download new versions 
+
+---
+# Costs
+- more complex code
+- compatibility with old app versions
+- nesting is exponential
+
+---
+# Benefits
+- dynamicity
+
+---
+## weighting costs × benefits
+# The less control we have, the more we value dynamicity 
+
+---
+## weighting costs × benefits
+.
+.
+.
+- backend: sometimes worth the cost
+- frontend: almost always worth the cost
+- mobile: *always* worth the cost
+
+---
+.
+.
+.
+# Best practices
+
+---
+# dynamic content > feature flag
+Always true for mobile, almost always for frontend 
+
+---
+# Use :include-list for named groups 
+Always true for backend, frontend and mobile 
+
+	{:rules
+	 #{{:types   :include-list
+	    :content {:filename "debit-team-members.txt"}}}}
+
+---
+# Always use :app-version
+Only for mobile
+
+	{:rules
+	 #{{:types   :app-version
+	    :content {:min-version #{{:platform :android
+	                              :code     1000000}
+	                             {:platform :ios
+	                              :code     2000000}}}}}}
+
+---
+# Extend ~common-rollout~ common-xp if required
+
+That's how :include-list, :app-version, etc. were born
+
+---
+# Beware of many nested feature flags
+True for backend, frontend and mobile
+
+---
+# Don't delete app-facing feature flags
+True for mobile
+
+---
+.
+.
+.
+# Include a feature flag on the whiteboarding phase
+
+---
+.
+.
+.
+# Include deleting/retiring the feature flag at the end
+
+---
+# Avoid renaming a feature flag
+Use :app-version with :min-version instead
+
+---
+.
+.
+.
+# And most importantly...
+
+---
+# *Always* rely on a feature flag on the app
+Never do a hotfix, avoid expedited releases at all costs
+
+---
+## References
+.
+% FIXME: links
+1. "Feature Toggles (aka Feature Flags)", by Pete Hodgson
+2. "Continuous integration vs. delivery vs. deployment", by Sten Pittet
+3. Accelerate, by N. Forsgren, J. Humble and G. Kim
+4. these slides: euandre.org/slide/
+5. prose version of this presentation
+6. view source
diff --git a/src/content/en/slide/2020/11/14/local-first-hype.adoc b/src/content/en/slide/2020/11/14/local-first-hype.adoc
new file mode 100644
index 0000000..fd83115
--- /dev/null
+++ b/src/content/en/slide/2020/11/14/local-first-hype.adoc
@@ -0,0 +1,204 @@
+# On "local-first"
+
+@Beyond the CRDT silver bullet
+
+---
+## Part 1
+# Exposition
+
+---
+## Target
+...
+- documents
+- files
+- personal data repositories
+..
+Not: banking services, e-commerce, social networking, ride-sharing, etc.
+
+---
+...
+# 7 ideals for local-first software
+
+---
+...
+# 1 - no spinners: your work at your fingertips
+
+---
+...
+# 2 - your work is not trapped on one device
+
+---
+...
+# 3 - the network is optional
+
+---
+...
+# 4 - seamless collaboration with your colleagues
+
+---
+...
+# 5 - the long now
+
+---
+...
+# 6 - security and privacy by default 
+
+---
+...
+# 7 - you retain ultimate ownership and control
+
+---
+## Towards a better future
+....
+@ CRDTs (Conflict-free Replicated Data Types) as a Foundational Technology
+
+---
+## Use case
+.
+	# in node A and node B
+	s = "Hello, World"
+	
+	# in node A
+	s = "Hello, Alice"
+	
+	# in node B
+	s = "Hello, Bob"
+
+How to reconcile those?
+- Hello, ABloibce
+- Hello, AliceBob
+- Hello, BobAlice
+- Hello, Alice
+\...
+
+---
+# Existing CRDTs differ
+- performance
+- storage
+- compression
+- metadata overhead
+
+---
+...
+# Hint towards the "automerge" CRDT
+
+---
+......
+@@show comparison table, page 9
+
+---
+## Part 2
+# Critique
+
+---
+## Software license
+...
+@@"In our opinion, maintaining control and ownership of data does not mean that the software must necessarily be open source."
+
+---
+## Example 1 - intentional restriction
+.
+	#!/bin/sh
+	TODAY="$(date +%s)"
+	LICENSE_EXPIRATION="$(date -d 2020-10-27 +%s)"
+	if [ "$TODAY" -ge "$LICENSE_EXPIRATION" ]; then
+		echo 'License expired!'
+		exit 1
+	fi
+	echo $((2 + 2))
+.
+	# today
+	$ ./useful-adder.sh
+	4
+
+	# tomorrow
+	$ ./useful-adder.sh
+	License expired!
+---
+## Example 2 - unintentional restriction
+.
+	# today
+	$ useful-program
+	# ... useful output ...
+	
+	# tomorrow, with more data
+	$ useful-program
+	ERROR: Panic!  Stack overflow!
+
+---
+..
+# local-first *requires* free software 
+
+Otherwise "The Long Now" (ideal nº5) is lost
+
+---
+## Denial of existing solutions
+..
+@@"In principle it is possible to collaborate without a repository service, e.g. by sending patch files by email, but the majority of Git users rely on GitHub." 
+.
+Solution: either GitHub+CRDTs or git send-email 
+
+---
+## Plain-text formats
+.
+@@"Git is highly optimized for code and similar line-based text file"
+.
+It even pulls software to the plain text directtion, e.g.:
+- delivery-templates
+- common-core.protocols.config
+.
+Why not exploit that more?
+
+---
+## Ditching of web applications
+..
+@@"The architecture of web apps remains fundamentally server-centric
+.
+% FIXME: links
+Disagree.  Contrast PouchDB with Android Instant Apps
+
+---
+## Costs are underrated
+.
+- storage
+- backups
+- maintenance
+.
+Example: blog vs vlog
+
+---
+## Real-time collaboration a bit overrated
+.
+It is only possible on the presence of reliable, medium-quality network connection
+..
+@@"X also works when inside an elevator, subway or plane!"
+
+---
+## On CRDTs and developer experience
+.
+@@"For an app developer, how does the use of a CRDT-based data layer compare to existing storage layers like a SQL database, a filesystem, or CoreData?  Is a distributed system harder to write software for?
+.
+@YES.
+.
+% FIXME: link
+See "A Note on Distributed Computing"
+
+---
+## Conclusion
+.
+Why this is a "paper I love": it took offline-first and ran with it.
+.
+But a pinch of CRDT won't make the world local-first. 
+.
+The tricky part is the end of the sentence: "in spite of the Cloud".
+
+---
+## References
+.
+% FIXME: links
+1. "Local-First Software: You Own Your Data, in spite of the Cloud", by M. Kleppmann, A. Wiggins, P. Van Hardenberg and M. F. McGranaghan
+2. The Morning Paper article
+3. "A Note on Distributed Compiting", by J. Waldo, G. Wyant, A. Wollrath and S. Kendall
+4. these slides: euandre.org/slide/
+5. prose version of this presentation
+6. view source
diff --git a/src/content/en/slides/2020-10-19-rollout-feature-flag-experiment-operational-toggle.slides b/src/content/en/slides/2020-10-19-rollout-feature-flag-experiment-operational-toggle.slides
deleted file mode 100644
index 22770e6..0000000
--- a/src/content/en/slides/2020-10-19-rollout-feature-flag-experiment-operational-toggle.slides
+++ /dev/null
@@ -1,343 +0,0 @@
----
-
-title: Rollout, feature flag, experiment, operational toggle
-
-date: 2020-10-19
-
-layout: slides
-
-lang: en
-
-ref: rollout-feature-flag-experiment-operational-toggle
-
-article: _articles/2020-10-19-feature-flags-differences-between-backend-frontend-and-mobile.md
-
----
-
-# Rollout, feature flag, experiment, operational toggle
-Different use cases for **backend**, **frontend** and **mobile**
-
----
-
-"Feature flags" tend to come up when talking about **continuous deployment**
-
-???
-
-I'm using "quotes" because I'm mixing up different meanings of "rollout"
-
----
-
-# CI
-continuous integration
-
-# CD
-continuous delivery
-
-# CD
-**continuous deployment**
-
-???
-
-Background: build vocabulary, why are feature flags related to CD
-
-CI solves: manual integration of long-lived branches
-
-CD solves: automation of deployment process
-
-CD solves: releases as frequent as possible
-
-That's where the "GoCD" name comes from
-
----
-
-# Types:
-1. rollout
-2. feature flag
-3. experiment
-4. operational toggle
-
----
-
-# rollout
-## For *rolling out* a new version of software
-
-**Short-lived** using **percentages**
-
-- a [new deployment of k8s][k8s]
-- new [APK released to the Play Store][apk]
-
-[k8s]: https://kubernetes.io/docs/concepts/workloads/controllers/deployment/#creating-a-deployment
-[apk]: https://support.google.com/googleplay/android-developer/answer/6346149?hl=en
-
-???
-
-Relevant as long as the new code is deployed
-
----
-
-# feature flag
-## For turning a feature *on* or *off*
-
-**Medium-lived** using **allow list**, **A/B test**, **percentage**,
-**app version**, *etc*.
-
-- `:new-chargeback-flow`
-- `:new-debit-card-activation-screen`
-
-???
-
-Relevant as long as the new code is being developed
-
----
-
-# experiment
-## For analyzing behaviour
-
-**Medium-lived** using **allow list** and **A/B test**
-
-- `:debit-withdrawal-test`
-
----
-
-# operational toggle
-## For disabling features in `#crash`-like situations
-
-**Long-lived** using **percentage**
-
-- `:bank-barcode-payment`
-- `:savings-bank-barcode-query-provider`
-
-???
-
-Lives for as long as the code is in production.
-
-It feels like a system-level circuit breaker.
-
----
-
-We now know about the types
-
-## But they have different relevance for **backend**, **frontend** and **mobile**
-
----
-
-# backend
-
-1. **rollout**: k8s blue/green, canary and ~`common-rollout`~ `common-xp`
-2. **feature flag**: ~`common-rollout`~ `common-xp` and datasets
-3. **experiment**: `common-xp`
-4. **operational toggle**: ~`common-rollout`~ `common-xp`
-
-???
-
-This is a bit why common-rollout isn't called *common-feature-flag*: it was
-initially designed with backend usage of mostly *rollouts* in mind, and just a
-bit *feature flags*.
-
-Avoid using configuration for doing operational toggles: it is less dynamic, so
-it defeats the purpose.
-
----
-
-# frontend
-
-1. **rollout**: CDN and page refreshes
-2. **feature flag**: percentages and maybe IPs (no `:customer/id` on the website)
-3. **experiment**: via dynamic backend control
-4. **operational toggle**: via dynamic backend control
-
----
-
-# mobile
-
-1. **rollout**: app stores
-2. **feature flag**: via dynamic backend control
-3. **experiment**: via dynamic backend control
-4. **operational toggle**: via dynamic backend control
-
----
-
-Key differentiator is
-## How much **control** we have over the **environment**
-
----
-
-## **backend**
-
-# Full control
-🎉
-
-???
-
-Can edit, update and even delete rollouts as desired.
-
-Mix and match at will!
-
----
-
-## **frontend**
-
-# Partial control
-
-When choose when to make a new version available
-
-???
-
-We can control when a new version is available, partially when someone will
-upgrade it.
-
-But it is easy to fallback to "reload the page and try again".
-
----
-
-## **mobile**
-
-# Very limited control
-
-- app stores can restrict updates (worse for iOS)
-- customers still have to download new versions
-
----
-
-# Costs
-
-- more complex code
-- compatibility with old app versions
-- nesting is exponential
-
----
-
-# Benefits
-
-- dynamicity
-
----
-
-## Weighting costs × benefits
-
-The less control we have, the more we value dynamicity
-
----
-
-## Weighting costs × benefits
-
-- backend: sometimes worth the cost
-- frontend: almost always worth cost
-- mobile: **always** worth cost
-
----
-
-# Best practices
-
----
-
-## Dynamic content > feature flag
-
-Always true for **mobile**, almost always for **frontend**
-
----
-
-## Use `:include-list` for named groups
-
-Always true for **backend**, **frontend** and **mobile**
-
-{% raw %}
-```clojure [2-3]
-{:rules
- #{{:type    :include-list
-    :content {:filename "debit-team-members.txt"}}}}
-```
-{% endraw %}
-
----
-
-## Always use `:app-version`
-
-only for **mobile**
-
-{% raw %}
-```clojure [2]
-{:rules
- #{{:type    :app-version
-    :content {:min-version #{{:platform :android
-                              :code     1000000}
-                             {:platform :ios
-                              :code     2000000}}}}}}
-```
-{% endraw %}
-
----
-
-## Extend ~`common-rollout`~ `common-xp` if required
-
-That's how `:include-list`, `:app-version`, *etc.* were born
-
----
-
-## Beware of many nested feature flags
-
-True for **backend**, **frontend** and **mobile**
-
-???
-
-Exponential growth of combinations
-
----
-
-## Don't delete app-facing feature flags
-
-True for **mobile**
-
-???
-
-This could break old app versions, only do this intentionally
-
-We don't have (yet) a strategy for dealing with LTS of the app, and we just say:
-"we'll support every app version out there".
-
----
-
-## Include a feature flag on the whiteboarding phase
-
----
-
-## Include deleting/retiring the feature flag at the end
-
----
-
-## Avoid renaming a feature flag
-
-Use `:app-version` with `:min-version` instead
-
----
-
-# And most importantly...
-
----
-
-# ***Always*** rely on a feature flag on the app
-
-Never do a hot fix, avoid expedited releases at all costs
-
-???
-
-The app is where we have less control, so the feature flag is how we get some of
-that control back.
-
-This doesn't mean you'll need 1 feature flag per PR
-
-There's not such thing as:
-"This is such a small thing, it doesn't need a feature flag"
-
-You should ask yourself:
-"It this crashes the app, am I OK with waiting for the next release train?"
-
----
-
-## Thank you!
-
-References:
-
-1. "[Feature Toggles (aka Feature Flags)](https://martinfowler.com/articles/feature-toggles.html)", by Pete Hodgson
-1. "[Continuous integration vs. continuous delivery vs. continuous deployment](https://www.atlassian.com/continuous-delivery/principles/continuous-integration-vs-delivery-vs-deployment)", by Sten Pittet
-1. [Accelerate](https://itrevolution.com/book/accelerate/), by N. Forsgren, J. Humble and G. Kim
diff --git a/src/content/en/slides/2020-11-14-on-local-first-beyond-the-crdt-silver-bullet.slides b/src/content/en/slides/2020-11-14-on-local-first-beyond-the-crdt-silver-bullet.slides
deleted file mode 100644
index 8f17982..0000000
--- a/src/content/en/slides/2020-11-14-on-local-first-beyond-the-crdt-silver-bullet.slides
+++ /dev/null
@@ -1,266 +0,0 @@
----
-
-title: 'On "local-first": beyond the CRDT silver bullet'
-
-date: 2020-11-14
-
-layout: slides
-
-lang: en
-
-ref: on-local-first-beyond-the-crdt-silver-bullet
-
-article: _articles/2020-11-14-local-first-software-you-own-your-data-in-spite-of-the-cloud-article-review.md
-
----
-
-# On local-first
-
-Beyond the CRDT silver bullet
-
----
-
-# Part 1
-
-Exposition
-
----
-
-## "cloud apps" vs "old-fashioned apps"
-
----
-
-## Target
-
-- documents
-- files
-- personal data repositories
-
-Not: banking services, e-commerce, social networking, ride-sharing, *etc*.
-
----
-
-## 7 Ideals for local-first software
-
----
-
-### 1 - No Spinners: Your Work at Your Fingertips
-
----
-
-### 2 - Your Work Is Not Trapped on One Device
-
----
-
-### 3 - The Network Is Optional
-
----
-
-### 4 - Seamless Collaboration with Your Colleagues
-
----
-
-### 5 - The Long Now
-
----
-
-### 6 - Security and Privacy by Default
-
----
-
-### 7 - You Retain Ultimate Ownership and Control
-
----
-
-## Towards a Better Future
-
-CRDTs (Conflict-free Replicated Data Types) as a Foundational Technology
-
----
-
-### Use case
-
-```
-# in node A and node B
-s = "Hello, World"
-
-# in node A
-s = "Hello, Alice"
-
-# in node B
-s = "Hello, Bob"
-```
-
-How to reconcile those?
-- `Hello, ABloibce`
-- `Hello, AliceBob`
-- `Hello, BobAlice`
-- `Hello, Alice`
-- `Hello, Bob`
-
----
-
-Existing CRDTs differ:
-- performance
-- storage
-- compression
-- metadata overhead
-
----
-
-Hint towards the "automerge" CRDT
-
----
-
-*show comparison table, page 9*
-
----
-
-# Part 2
-
-Critique
-
----
-
-### Software license
-
-> In our opinion, maintaining control and ownership of data does not mean that
-> the software must necessarily be open source.
-
----
-
-#### Example 1 - intentional restriction
-
-```bash
-#!/bin/sh
-
-TODAY=$(date +%s)
-LICENSE_EXPIRATION=$(date -d 2020-10-27 +%s)
-
-if [ $TODAY -ge $LICENSE_EXPIRATION ]; then
-  echo 'License expired!'
-  exit 1
-fi
-
-echo $((2 + 2))
-```
-
-```bash
-# today
-$ ./useful-adder.sh
-4
-# tomorrow
-$ ./useful-adder.sh
-License expired!
-```
-
----
-
-#### Example 2 - unintentional restriction
-
-```bash
-# today
-$ useful-program
-# ...useful output...
-
-# tomorrow, with more data
-$ useful-program
-ERROR: Panic! Stack overflow!
-```
----
-
-### local-first **requires** free software
-
-Otherwise "The Long Now" (ideal nº5) is lost
-
----
-
-### Denial of existing solutions
-
-> In principle it is possible to collaborate without a repository service,
-> e.g. by sending patch files by email, but the majority of Git users rely
-> on GitHub.
-
-Solution: either  GitHub+CRDTs or `git` **`send-email`**
-
----
-
-### Plain text formats
-
-> Git is highly optimized for code and similar line-based text file
-
-It even pulls software to the plain text direction, e.g.:
-- delivery-templates
-- `common-core.protocols.config`
-
-Why not exploit that more?
-
----
-
-### Ditching of web applications
-
-> The architecture of web apps remains fundamentally server-centric
-
-Disagree.  Contrast [PouchDB][pouchdb] with Android [Instant Apps][instant-apps]
-
-[pouchdb]: https://pouchdb.com/
-[instant-apps]: https://developer.android.com/topic/google-play-instant
-
-???
-
-Talk on dynamic content
-
----
-
-### Costs are underrated
-
-- storage
-- backups
-- maintenance
-
-Example: blog vs vlog
-
----
-
-### Real-time collaboration a bit overrated
-
-It is only possible on the presence of reliable, medium-quality network
-connection
-
-> X also works when inside an elevator, subway or plane!
-
-<!-- 🤦‍ -->
-
----
-
-### On CRDTs and developer experience
-
-> For an app developer, how does the use of a CRDT-based data layer compare to
-> existing storage layers like a SQL database, a filesystem, or CoreData?  Is a
-> distributed system harder to write software for?
-
-Yes.
-
-See "[A Note on Distributed Computing][note-dist-comp]"
-
-[note-dist-comp]: https://web.archive.org/web/20130116163535/http://labs.oracle.com/techrep/1994/smli_tr-94-29.pdf
-
----
-
-## Conclusion
-
-Why this is a "paper I love": it took offline-first and ran with it.
-
-But a pinch of CRDT won't make the world local-first.
-
-The tricky part is the end of the sentence: "**in spite of the Cloud**".
-
----
-
-## Thank you!
-
-References:
-
-1. "[Local-First Software: You Own Your Data, in spite of the Cloud](https://martin.kleppmann.com/papers/local-first.pdf)", by M. Kleppmann, A. Wiggins, P. Van Hardenberg and M. F. McGranaghan
-1. [The Morning Paper](https://blog.acolyer.org/2019/11/20/local-first-software/) article
-1. "[A Note on Distributed Computing](https://web.archive.org/web/20130116163535/http://labs.oracle.com/techrep/1994/smli_tr-94-29.pdf)", by J. Waldo, G. Wyant, A. Wollrath and S Kendall
diff --git a/src/content/en/tils/2020/08/12/filename-timestamp.adoc b/src/content/en/til/2020/08/12/filename-timestamp.adoc
index aa8d63b..aa8d63b 100644
--- a/src/content/en/tils/2020/08/12/filename-timestamp.adoc
+++ b/src/content/en/til/2020/08/12/filename-timestamp.adoc
diff --git a/src/content/en/tils/2020/08/13/code-jekyll.adoc b/src/content/en/til/2020/08/13/code-jekyll.adoc
index 6bd90b0..6bd90b0 100644
--- a/src/content/en/tils/2020/08/13/code-jekyll.adoc
+++ b/src/content/en/til/2020/08/13/code-jekyll.adoc
diff --git a/src/content/en/tils/2020/08/14/browse-git.adoc b/src/content/en/til/2020/08/14/browse-git.adoc
index 6b3ff6d..6b3ff6d 100644
--- a/src/content/en/tils/2020/08/14/browse-git.adoc
+++ b/src/content/en/til/2020/08/14/browse-git.adoc
diff --git a/src/content/en/tils/2020/08/16/git-search.adoc b/src/content/en/til/2020/08/16/git-search.adoc
index 4113f3f..4113f3f 100644
--- a/src/content/en/tils/2020/08/16/git-search.adoc
+++ b/src/content/en/til/2020/08/16/git-search.adoc
diff --git a/src/content/en/tils/2020/08/28/grep-online.adoc b/src/content/en/til/2020/08/28/grep-online.adoc
index 77363ab..77363ab 100644
--- a/src/content/en/tils/2020/08/28/grep-online.adoc
+++ b/src/content/en/til/2020/08/28/grep-online.adoc
diff --git a/src/content/en/tils/2020/09/04/cli-email-fun-profit.adoc b/src/content/en/til/2020/09/04/cli-email-fun-profit.adoc
index 1da1154..1da1154 100644
--- a/src/content/en/tils/2020/09/04/cli-email-fun-profit.adoc
+++ b/src/content/en/til/2020/09/04/cli-email-fun-profit.adoc
diff --git a/src/content/en/tils/2020/09/05/oldschool-pr.adoc b/src/content/en/til/2020/09/05/oldschool-pr.adoc
index 392ec67..392ec67 100644
--- a/src/content/en/tils/2020/09/05/oldschool-pr.adoc
+++ b/src/content/en/til/2020/09/05/oldschool-pr.adoc
diff --git a/src/content/en/tils/2020/10/11/search-git-history.adoc b/src/content/en/til/2020/10/11/search-git-history.adoc
index 696368c..696368c 100644
--- a/src/content/en/tils/2020/10/11/search-git-history.adoc
+++ b/src/content/en/til/2020/10/11/search-git-history.adoc
diff --git a/src/content/en/tils/2020/11/08/find-broken-symlink.adoc b/src/content/en/til/2020/11/08/find-broken-symlink.adoc
index 624d24a..624d24a 100644
--- a/src/content/en/tils/2020/11/08/find-broken-symlink.adoc
+++ b/src/content/en/til/2020/11/08/find-broken-symlink.adoc
diff --git a/src/content/en/tils/2020/11/12/diy-nix-bash-ci.adoc b/src/content/en/til/2020/11/12/diy-nix-bash-ci.adoc
index 97ace30..97ace30 100644
--- a/src/content/en/tils/2020/11/12/diy-nix-bash-ci.adoc
+++ b/src/content/en/til/2020/11/12/diy-nix-bash-ci.adoc
diff --git a/src/content/en/tils/2020/11/12/git-bisect-automation.adoc b/src/content/en/til/2020/11/12/git-bisect-automation.adoc
index dff8737..dff8737 100644
--- a/src/content/en/tils/2020/11/12/git-bisect-automation.adoc
+++ b/src/content/en/til/2020/11/12/git-bisect-automation.adoc
diff --git a/src/content/en/tils/2020/11/12/useful-bashvars.adoc b/src/content/en/til/2020/11/12/useful-bashvars.adoc
index fb148fb..fb148fb 100644
--- a/src/content/en/tils/2020/11/12/useful-bashvars.adoc
+++ b/src/content/en/til/2020/11/12/useful-bashvars.adoc
diff --git a/src/content/en/tils/2020/11/14/gpodder-media.adoc b/src/content/en/til/2020/11/14/gpodder-media.adoc
index f722f35..f722f35 100644
--- a/src/content/en/tils/2020/11/14/gpodder-media.adoc
+++ b/src/content/en/til/2020/11/14/gpodder-media.adoc
diff --git a/src/content/en/tils/2020/11/30/git-notes-ci.adoc b/src/content/en/til/2020/11/30/git-notes-ci.adoc
index 48a996b..48a996b 100644
--- a/src/content/en/tils/2020/11/30/git-notes-ci.adoc
+++ b/src/content/en/til/2020/11/30/git-notes-ci.adoc
diff --git a/src/content/en/tils/2020/12/15/shellcheck-repo.adoc b/src/content/en/til/2020/12/15/shellcheck-repo.adoc
index 387e793..387e793 100644
--- a/src/content/en/tils/2020/12/15/shellcheck-repo.adoc
+++ b/src/content/en/til/2020/12/15/shellcheck-repo.adoc
diff --git a/src/content/en/tils/2020/12/29/svg.adoc b/src/content/en/til/2020/12/29/svg.adoc
index e0e75a5..e0e75a5 100644
--- a/src/content/en/tils/2020/12/29/svg.adoc
+++ b/src/content/en/til/2020/12/29/svg.adoc
diff --git a/src/content/en/tils/2021/01/12/curl-awk-emails.adoc b/src/content/en/til/2021/01/12/curl-awk-emails.adoc
index d432da2..d432da2 100644
--- a/src/content/en/tils/2021/01/12/curl-awk-emails.adoc
+++ b/src/content/en/til/2021/01/12/curl-awk-emails.adoc
diff --git a/src/content/en/tils/2021/01/17/posix-shebang.adoc b/src/content/en/til/2021/01/17/posix-shebang.adoc
index 5cf0695..5cf0695 100644
--- a/src/content/en/tils/2021/01/17/posix-shebang.adoc
+++ b/src/content/en/til/2021/01/17/posix-shebang.adoc
diff --git a/src/content/en/tils/2021/04/24/cl-generic-precedence.adoc b/src/content/en/til/2021/04/24/cl-generic-precedence.adoc
index 541afb0..541afb0 100644
--- a/src/content/en/tils/2021/04/24/cl-generic-precedence.adoc
+++ b/src/content/en/til/2021/04/24/cl-generic-precedence.adoc
diff --git a/src/content/en/tils/2021/04/24/clojure-autocurry.adoc b/src/content/en/til/2021/04/24/clojure-autocurry.adoc
index a2c2835..a2c2835 100644
--- a/src/content/en/tils/2021/04/24/clojure-autocurry.adoc
+++ b/src/content/en/til/2021/04/24/clojure-autocurry.adoc
diff --git a/src/content/en/tils/2021/04/24/scm-nif.adoc b/src/content/en/til/2021/04/24/scm-nif.adoc
index 2ea8a6f..2ea8a6f 100644
--- a/src/content/en/tils/2021/04/24/scm-nif.adoc
+++ b/src/content/en/til/2021/04/24/scm-nif.adoc
diff --git a/src/content/en/tils/2021/07/23/git-tls-gpg.adoc b/src/content/en/til/2021/07/23/git-tls-gpg.adoc
index f198c2b..f198c2b 100644
--- a/src/content/en/tils/2021/07/23/git-tls-gpg.adoc
+++ b/src/content/en/til/2021/07/23/git-tls-gpg.adoc
diff --git a/src/content/en/tils/2021/08/11/js-bigint-reviver.adoc b/src/content/en/til/2021/08/11/js-bigint-reviver.adoc
index 98ee79b..98ee79b 100644
--- a/src/content/en/tils/2021/08/11/js-bigint-reviver.adoc
+++ b/src/content/en/til/2021/08/11/js-bigint-reviver.adoc
diff --git a/src/content/en/podcasts/categories.adoc b/src/content/en/til/categories.adoc
index f29acda..feb64ff 100644
--- a/src/content/en/podcasts/categories.adoc
+++ b/src/content/en/til/categories.adoc
@@ -1 +1,2 @@
 = Articles by category
+:type: categories
diff --git a/src/content/en/tils/index.adoc b/src/content/en/til/index.adoc
index 7e85335..7e85335 100644
--- a/src/content/en/tils/index.adoc
+++ b/src/content/en/til/index.adoc