From fe511e0e912589306dc48a4d31ec3a163ce4b1c5 Mon Sep 17 00:00:00 2001
From: Matt McKay <mmcky@users.noreply.github.com>
Date: Tue, 1 Sep 2026 10:04:58 +1000
Subject: [PATCH 1/2] Delete committed dataset orphans (Track X)

These files are committed but read by nothing: the audit at https://quantecon.github.io/data-lectures/audit.json (2026-08-31 run) lists them under orphans, and an authenticated content sweep of 407 repositories (283 QuantEcon org repos plus the forks of the six holding repos, by basename, positive and negative controls in the same pass) on 2026-09-01 found no reader of these paths. Tracker: QuantEcon/workspace-lectures#57.

finite_markov writes web_graph_data.txt with %%file before reading it, so neither the _static copy nor the stray copy at the lectures/ root is ever consumed.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
---
 .../finite_markov/web_graph_data.txt          | 37 -------------------
 lectures/web_graph_data.txt                   | 37 -------------------
 2 files changed, 74 deletions(-)
 delete mode 100644 lectures/_static/lecture_specific/finite_markov/web_graph_data.txt
 delete mode 100644 lectures/web_graph_data.txt

diff --git a/lectures/_static/lecture_specific/finite_markov/web_graph_data.txt b/lectures/_static/lecture_specific/finite_markov/web_graph_data.txt
deleted file mode 100644
index d8f52cb79..000000000
--- a/lectures/_static/lecture_specific/finite_markov/web_graph_data.txt
+++ /dev/null
@@ -1,37 +0,0 @@
-a -> d;
-a -> f;
-b -> j;
-b -> k;
-b -> m;
-c -> c;
-c -> g;
-c -> j;
-c -> m;
-d -> f;
-d -> h;
-d -> k;
-e -> d;
-e -> h;
-e -> l;
-f -> a;
-f -> b;
-f -> j;
-f -> l;
-g -> b;
-g -> j;
-h -> d;
-h -> g;
-h -> l;
-h -> m;
-i -> g;
-i -> h;
-i -> n;
-j -> e;
-j -> i;
-j -> k;
-k -> n;
-l -> m;
-m -> g;
-n -> c;
-n -> j;
-n -> m;
diff --git a/lectures/web_graph_data.txt b/lectures/web_graph_data.txt
deleted file mode 100644
index d8f52cb79..000000000
--- a/lectures/web_graph_data.txt
+++ /dev/null
@@ -1,37 +0,0 @@
-a -> d;
-a -> f;
-b -> j;
-b -> k;
-b -> m;
-c -> c;
-c -> g;
-c -> j;
-c -> m;
-d -> f;
-d -> h;
-d -> k;
-e -> d;
-e -> h;
-e -> l;
-f -> a;
-f -> b;
-f -> j;
-f -> l;
-g -> b;
-g -> j;
-h -> d;
-h -> g;
-h -> l;
-h -> m;
-i -> g;
-i -> h;
-i -> n;
-j -> e;
-j -> i;
-j -> k;
-k -> n;
-l -> m;
-m -> g;
-n -> c;
-n -> j;
-n -> m;

From 9d2aef6367393079a872191ab1d99b13a3d96fcf Mon Sep 17 00:00:00 2001
From: Matt McKay <mmcky@users.noreply.github.com>
Date: Tue, 1 Sep 2026 10:04:58 +1000
Subject: [PATCH 2/2] Ignore the web_graph_data.txt that finite_markov
 regenerates

A local run of finite_markov.md writes lectures/web_graph_data.txt into the working tree; ignoring it prevents the deleted copy from being re-committed by a later git add -A.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
---
 .gitignore | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/.gitignore b/.gitignore
index d6cd31930..c08007d05 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,4 +4,6 @@ lectures/_build/
 .ipynb_checkpoints/
 .virtual_documents/
 node_modules/
-package-lock.json
\ No newline at end of file
+package-lock.json
+# regenerated by finite_markov.md via %%file; never commit it
+lectures/web_graph_data.txt