diff --git a/.claude/rules/04-code-conventions.md b/.claude/rules/04-code-conventions.md
index 738f80d..a5943ba 100644
--- a/.claude/rules/04-code-conventions.md
+++ b/.claude/rules/04-code-conventions.md
@@ -88,6 +88,10 @@ liste, et elle est vraie demain.
 - Format de commit : `[TYPE] portée : sujet`, sujet à l'impératif, 72
   caractères au plus. Tags réellement utilisés : `[UPD]`, `[FIX]`, `[ADD]`,
   `[IMP]`, `[REF]`.
+- **Nommer les fichiers à l'indexation, jamais `git add -A`** : `private/` et
+  `tasks/` ne sont pas suivis EXPRÈS, et un ratissage les commit. Il emporte
+  aussi ce qui est en cours ailleurs dans le checkout, sous un sujet qui ne le
+  couvre pas. `git add -p` quand un fichier porte deux sujets.
 
 ### Le sujet
 
diff --git a/conf/template_claude_commands_commit.md b/conf/template_claude_commands_commit.md
index 0fec838..49633e8 100644
--- a/conf/template_claude_commands_commit.md
+++ b/conf/template_claude_commands_commit.md
@@ -244,8 +244,20 @@ configured `user.email` then fails on the committer.
 Use a heredoc rather than `-m`: a body with quotes, backticks or accented
 characters survives it unharmed.
 
+**Name the files. Never `git add -A`.** It stages everything untracked, and
+this repository keeps two directories untracked ON PURPOSE: `private/`, the
+only place allowed to hold customer data, and `tasks/`, where the convention
+sends the investigation precisely because it is not versioned. A sweep commits
+both. It also swallows whatever else is in flight in the checkout — another
+tool's output, a half-finished edit — under a subject that does not cover it.
+
+`git status --porcelain` lists what changed; stage the paths that belong to
+the subject you just wrote, and no others. When one file carries two subjects,
+`git add -p` stages the hunks that belong to this commit.
+
 ```bash
-git add -A
+git status --porcelain
+git add script/module/thing.py test/test_thing.py
 git -c user.name="Your Name" -c user.email="your@email.com" commit -F - <<'MSG'
 [TAG] scope: description