gh-143963: Add more possible solutions for troubleshooting.

.devcontainer/devcontainer.json

@@ -1,13 +1,10 @@
 {
-    "image": "ghcr.io/python/devcontainer:2024.09.25.11038928730",
+    "image": "ghcr.io/python/devcontainer:latest",
     "onCreateCommand": [
         // Install common tooling.
         "dnf",
         "install",
         "-y",
-        "which",
-        "zsh",
-        "fish",
         // For umask fix below.
         "/usr/bin/setfacl"
     ],

.editorconfig

@@ -1,11 +1,11 @@
 root = true
 
-[*.{py,c,cpp,h,js,rst,md,yml,yaml}]
+[*.{py,c,cpp,h,js,rst,md,yml,yaml,gram}]
 trim_trailing_whitespace = true
 insert_final_newline = true
 indent_style = space
 
-[*.{py,c,cpp,h}]
+[*.{py,c,cpp,h,gram}]
 indent_size = 4
 
 [*.rst]

.gitattributes

@@ -10,6 +10,7 @@
 *.ico binary
 *.jpg binary
 *.pck binary
+*.pdf binary
 *.png binary
 *.psd binary
 *.tar binary
@@ -67,6 +68,7 @@ PCbuild/readme.txt  dos
 **/clinic/*.cpp.h                                   generated
 **/clinic/*.h.h                                     generated
 *_db.h                                              generated
+Doc/c-api/lifecycle.dot.svg                         generated
 Doc/data/stable_abi.dat                             generated
 Doc/library/token-list.inc                          generated
 Include/internal/pycore_ast.h                       generated
@@ -80,7 +82,10 @@ Include/opcode.h                                    generated
 Include/opcode_ids.h                                generated
 Include/token.h                                     generated
 Lib/_opcode_metadata.py                             generated
+Lib/idlelib/help.html                               generated
 Lib/keyword.py                                      generated
+Lib/pydoc_data/topics.py                            generated
+Lib/pydoc_data/module_docs.py                       generated
 Lib/test/certdata/*.pem                             generated
 Lib/test/certdata/*.0                               generated
 Lib/test/levenshtein_examples.json                  generated

.github/CODEOWNERS

@@ -8,14 +8,18 @@
 .github/**                    @ezio-melotti @hugovk @AA-Turner
 
 # pre-commit
-.pre-commit-config.yaml       @hugovk @AlexWaygood
+.pre-commit-config.yaml       @hugovk
 .ruff.toml                    @hugovk @AlexWaygood @AA-Turner
 
 # Build system
 configure*                    @erlend-aasland @corona10
 Makefile.pre.in               @erlend-aasland
 Modules/Setup*                @erlend-aasland
 
+# generate-build-details
+Tools/build/generate-build-details.py   @FFY00
+Lib/test/test_build_details.py          @FFY00
+
 # argparse
 **/*argparse*                 @savannahostrowski
 
@@ -27,6 +31,7 @@ Modules/Setup*                @erlend-aasland
 **/*genobject*                @markshannon
 **/*hamt*                     @1st1
 **/*jit*                      @brandtbucher @savannahostrowski
+Python/perf_jit_trampoline.c  # Exclude the owners of "**/*jit*", above.
 Objects/set*                  @rhettinger
 Objects/dict*                 @methane @markshannon
 Objects/typevarobject.c       @JelleZijlstra
@@ -53,6 +58,7 @@ Lib/test/test_type_*.py       @JelleZijlstra
 Lib/test/test_capi/test_misc.py  @markshannon
 Lib/test/test_pyrepl/*        @pablogsal @lysnikolaou @ambv
 Tools/c-analyzer/             @ericsnowcurrently
+Tools/check-c-api-docs/       @ZeroIntensity
 
 # dbm
 **/*dbm*                      @corona10 @erlend-aasland @serhiy-storchaka
@@ -281,14 +287,21 @@ Doc/howto/clinic.rst          @erlend-aasland
 # Subinterpreters
 **/*interpreteridobject.*     @ericsnowcurrently
 **/*crossinterp*              @ericsnowcurrently
-Lib/test/support/interpreters/  @ericsnowcurrently
 Modules/_interp*module.c      @ericsnowcurrently
+Lib/test/test__interp*.py     @ericsnowcurrently
+Lib/concurrent/interpreters/  @ericsnowcurrently
+Lib/test/support/channels.py  @ericsnowcurrently
+Doc/library/concurrent.interpreters.rst  @ericsnowcurrently
 Lib/test/test_interpreters/   @ericsnowcurrently
+Lib/concurrent/futures/interpreter.py  @ericsnowcurrently
 
 # Android
 **/*Android*                  @mhsmith @freakboy3742
 **/*android*                  @mhsmith @freakboy3742
 
+# Apple
+/Apple                        @freakboy3742
+
 # iOS (but not termios)
 **/iOS*                       @freakboy3742
 **/ios*                       @freakboy3742
@@ -298,7 +311,12 @@ Lib/test/test_interpreters/   @ericsnowcurrently
 **/*-ios*                     @freakboy3742
 
 # WebAssembly
-/Tools/wasm/                  @brettcannon @freakboy3742
+Tools/wasm/config.site-wasm32-emscripten  @freakboy3742
+/Tools/wasm/README.md         @brettcannon @freakboy3742
+/Tools/wasm/wasi-env          @brettcannon
+/Tools/wasm/wasi_build.py     @brettcannon
+/Tools/wasm/emscripten        @freakboy3742
+/Tools/wasm/wasi              @brettcannon
 
 # SBOM
 /Misc/externals.spdx.json     @sethmlarson
@@ -326,3 +344,8 @@ Modules/_xxtestfuzz/          @ammaraskar
 **/*templateobject*           @lysnikolaou
 **/*templatelib*              @lysnikolaou
 **/*tstring*                  @lysnikolaou
+
+# Remote debugging
+Python/remote_debug.h         @pablogsal
+Python/remote_debugging.c     @pablogsal
+Modules/_remote_debugging_module.c @pablogsal @ambv @1st1

.github/actionlint.yaml

@@ -1,6 +1,7 @@
 self-hosted-runner:
   # Pending https://github.com/rhysd/actionlint/issues/533
-  labels: ["windows-11-arm"]
+  # and https://github.com/rhysd/actionlint/issues/571
+  labels: ["windows-11-arm", "macos-15-intel"]
 
 config-variables: null
 

.github/dependabot.yml

@@ -12,10 +12,17 @@ updates:
         update-types:
           - "version-update:semver-minor"
           - "version-update:semver-patch"
+    cooldown:
+      # https://blog.yossarian.net/2025/11/21/We-should-all-be-using-dependency-cooldowns
+      # Cooldowns protect against supply chain attacks by avoiding the
+      # highest-risk window immediately after new releases.
+      default-days: 14
   - package-ecosystem: "pip"
     directory: "/Tools/"
     schedule:
       interval: "monthly"
     labels:
       - "skip issue"
       - "skip news"
+    cooldown:
+      default-days: 14

.github/workflows/add-issue-header.yml

@@ -20,7 +20,7 @@ jobs:
       issues: write
     timeout-minutes: 5
     steps:
-      - uses: actions/github-script@v7
+      - uses: actions/github-script@v8
         with:
           # language=JavaScript
           script: |