diff --git a/auto.def b/auto.def
index 8466fc779a..90f11f1ee9 100644
--- a/auto.def
+++ b/auto.def
@@ -194,6 +194,7 @@ set flags {
   test-status          => {Enable status of tests}
   gcov=0               => {Enable coverage testing using gcov}
   linemacros           => {Enable #line macros in the amalgamation}
+  dev                  => {Enable dev-mode build: automatically enables certain other flags}
   dump-defines=0       => {Dump autosetup defines to $DUMP_DEFINES_TXT (for build debugging)}
   #soname:=none         => {SONAME for libsqlite3.so}
   #^^^ we "could", but arguably shouldn't, support clients passing a
@@ -469,6 +470,16 @@ proc sqlite-check-soname {} {
 }
 sqlite-check-soname
 
+proj-if-opt-truthy dev {
+  # --enable-dev needs to come early so that the downstream tests
+  # which check for these flags will show the user their updated
+  # state.
+  proj-opt-set all 1
+  proj-opt-set debug 1
+  proj-opt-set amalgamation 0
+  define CFLAGS [get-env CFLAGS {-O0 -g}]
+}
+
 proj-define-for-opt shared ENABLE_SHARED "Build shared library?"
 
 if {![proj-define-for-opt static ENABLE_STATIC \
diff --git a/manifest b/manifest
index b9f21671b1..cf36dbfee1 100644
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C Remove\sunused\ssqlite_cfg.h.in\sfrom\sthe\sbuild.
-D 2024-11-14T16:06:36.424
+C Add\s--enable-dev\sconfigure\sflag\swhich\ssets\svarious\sother\sflags.
+D 2024-11-14T17:52:59.923
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F LICENSE.md e108e1e69ae8e8a59e93c455654b8ac9356a11720d3345df2a4743e9590fb20d
@@ -13,7 +13,7 @@ F art/icon-80x90.gif 65509ce3e5f86a9cd64fe7fca2d23954199f31fe44c1e09e208c80fb83d
 F art/sqlite370.eps aa97a671332b432a54e1d74ff5e8775be34200c2
 F art/sqlite370.ico af56c1d00fee7cd4753e8631ed60703ed0fc6e90
 F art/sqlite370.jpg d512473dae7e378a67e28ff96a34da7cb331def2
-F auto.def 7dbe7bebe9c3bea4de674053339964b4b26cff5e2fdc20948acc723b5080bffd
+F auto.def 0201703bd03a1e998646f47e8ca0c7b89a219ff2ab87139fdfc34b820d230981
 F autoconf/INSTALL 83e4a25da9fd053c7b3665eaaaf7919707915903
 F autoconf/Makefile.am adedc1324b6a87fdd1265ddd336d2fb7d4f36a0e77b86ea553ae7cc4ea239347
 F autoconf/Makefile.fallback 22fe523eb36dfce31e0f6349f782eb084e86a5620b2b0b4f84a2d6133f53f5ac
@@ -2198,9 +2198,8 @@ F tool/version-info.c 3b36468a90faf1bbd59c65fd0eb66522d9f941eedd364fabccd7227350
 F tool/warnings-clang.sh bbf6a1e685e534c92ec2bfba5b1745f34fb6f0bc2a362850723a9ee87c1b31a7
 F tool/warnings.sh 49a486c5069de041aedcbde4de178293e0463ae9918ecad7539eedf0ec77a139
 F tool/win/sqlite.vsix deb315d026cc8400325c5863eef847784a219a2f
-P 5c4eb625709eda24b11a0437b150a60fc1497c136a4a2ab2b9d559d893dd397a 9a726b4be8ddd4b388478024a0952cfd4f0b9f665ab69119a6de0b996ac72216
-R a15407640daa9f3a9447a9e78becdb8b
-T +closed 9a726b4be8ddd4b388478024a0952cfd4f0b9f665ab69119a6de0b996ac72216 Closed\sby\sintegrate-merge.
+P bba54e26de56ddf804990f5cd9a1978a14580f06c5771a79803907013df8491e
+R 52449d4304f2eea2db488af261c0c62f
 U stephan
-Z 19ed65a5f5fcf67d42d45f2f1b7e12e4
+Z 77b9d9984833e746e00359840a52aebd
 # Remove this line to create a well-formed Fossil manifest.
diff --git a/manifest.uuid b/manifest.uuid
index 40230bb725..86860b0279 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-bba54e26de56ddf804990f5cd9a1978a14580f06c5771a79803907013df8491e
+ea79c363a42484357ac4ac3422f3466e5bc5cb56e5b2a06a3dc4ec90fea1c190