diff --git a/src/lib/apply.sh b/src/lib/apply.sh
index e823b56..3d21b0b 100644
--- a/src/lib/apply.sh
+++ b/src/lib/apply.sh
@@ -19,6 +19,7 @@ create_all() {
   add_framework
   install_framework
   copy_templates
+  exclude_framework_files
   create_env_file
 }
 
diff --git a/src/lib/constants.sh b/src/lib/constants.sh
index d5775dd..5fc95aa 100644
--- a/src/lib/constants.sh
+++ b/src/lib/constants.sh
@@ -30,8 +30,12 @@ readonly HINT_LICENSE="use a Gitea license key (letters, digits, '.', '+' or '-'
 readonly HINT_DIRECTORY="must not be empty, start with '-' or contain control characters"
 readonly HINT_TOKEN="8 to 255 letters, digits or _ . ~ + / = -"
 readonly ENV_FILE_NAME=".env"
+# What the framework installs into the new project that git must not list: the
+# folders of the skills and the copy of AGENTS.md, anchored to the project
+# root. They go into .git/info/exclude of the new project.
+readonly FRAMEWORK_EXCLUDES=(/.claude /.agents /AGENTS.md)
 readonly PLAN_STEPS=("GitHub repository" "Gitea repository" "Push mirror"
-  "Local project" "Framework" "Skills and hooks" "Templates" "Project .env")
+  "Local project" "Framework" "Skills and hooks" "Templates" "Git excludes" "Project .env")
 # shellcheck disable=SC2034  # read through namerefs (parse_env_file)
 readonly CONFIG_KEYS=(GITHUB_API_URL GITHUB_WEB_URL GITEA_URL GITEA_API_URL
   GITEA_SSH_PORT MIRROR_INTERVAL FRAMEWORK_REPO
diff --git a/src/lib/envfile.sh b/src/lib/envfile.sh
index f2b67eb..d67c40e 100644
--- a/src/lib/envfile.sh
+++ b/src/lib/envfile.sh
@@ -26,19 +26,8 @@ env_file_key_list() {
 # file: the entry goes into .git/info/exclude, which is never committed. It
 # does nothing when .env is already ignored.
 exclude_env_file() {
-  local dir="$1" gitdir exclude
-  if git_project "$dir" check-ignore -q -- "$ENV_FILE_NAME"; then
-    return 0
-  fi
-  gitdir="$(git_project "$dir" rev-parse --absolute-git-dir)"
-  exclude="$gitdir/info/exclude"
-  mkdir -p -- "$gitdir/info"
-  # Start on a fresh line when the file does not end with one.
-  if [[ -s $exclude && -n "$(tail -c 1 -- "$exclude")" ]]; then
-    printf '\n' >>"$exclude"
-  fi
-  printf '%s\n' "# RepoFoundry: the credentials file of this project" "$ENV_FILE_NAME" >>"$exclude"
-  git_project "$dir" check-ignore -q -- "$ENV_FILE_NAME" ||
+  local dir="$1"
+  exclude_from_git "$dir" "RepoFoundry: the credentials file of this project" "$ENV_FILE_NAME" ||
     die "could not make git ignore $ENV_FILE_NAME in $dir; nothing was written to it"
 }
 
diff --git a/src/lib/framework.sh b/src/lib/framework.sh
index ee25452..f0d1d56 100644
--- a/src/lib/framework.sh
+++ b/src/lib/framework.sh
@@ -4,7 +4,7 @@
 #
 # Part of create-project.sh: sourced by it, never run on its own.
 #
-# Provides: is_framework_skipped, init_framework_submodules, add_framework, run_framework_script, install_skills, install_hooks, install_framework, copy_template, copy_templates
+# Provides: is_framework_skipped, init_framework_submodules, add_framework, run_framework_script, install_skills, install_hooks, install_framework, copy_template, copy_templates, exclude_framework_files
 
 # is_framework_skipped: succeed when the framework steps are left out because
 # SSH to Gitea is not available (the Maintainer agreed to that).
@@ -165,3 +165,39 @@ copy_templates() {
   notes="$notes; ${STATE[template_note]}"
   finish_step "$label" "created" "($notes)"
 }
+
+# exclude_framework_files: make git ignore .claude, .agents and AGENTS.md in
+# the new project, through its .git/info/exclude (never .gitignore, so no
+# tracked file changes and nothing is committed). Only when the framework
+# steps ran. A path git already tracks stays tracked: an exclusion does not
+# apply to it, so the step names it.
+exclude_framework_files() {
+  local label="Git excludes" dir="${PROJECT[directory]}" entry path tracked=() note written
+  if is_framework_skipped; then
+    finish_step "$label" "skipped" "(no SSH access to Gitea)"
+    return 0
+  fi
+  begin_step "$label"
+  exclude_from_git "$dir" "RepoFoundry: the files installed from the framework" "${FRAMEWORK_EXCLUDES[@]}" ||
+    die "could not make git ignore the framework files in $dir; check $dir/.git/info/exclude"
+  written="$REPLY"
+  for entry in "${FRAMEWORK_EXCLUDES[@]}"; do
+    path="${entry#/}"
+    if [[ -n "$(git_project "$dir" ls-files -- "$path")" ]]; then
+      tracked+=("$path")
+    fi
+  done
+  if ((written == 0)); then
+    note="${FRAMEWORK_EXCLUDES[*]} already excluded"
+  else
+    note="${FRAMEWORK_EXCLUDES[*]} added to .git/info/exclude"
+  fi
+  if ((${#tracked[@]})); then
+    note="$note; git tracks ${tracked[*]}, so it is not ignored"
+  fi
+  if ((written == 0)); then
+    finish_step "$label" "reused" "($note)"
+  else
+    finish_step "$label" "created" "($note)"
+  fi
+}
diff --git a/src/lib/git.sh b/src/lib/git.sh
index e952674..176bd30 100644
--- a/src/lib/git.sh
+++ b/src/lib/git.sh
@@ -4,7 +4,7 @@
 #
 # Part of create-project.sh: sourced by it, never run on its own.
 #
-# Provides: git_project, fetch_origin
+# Provides: git_project, exclude_from_git, fetch_origin
 
 # git_project DIR ARGS...: run git in DIR. Prompts are switched off and stdin
 # is closed (git must not eat the answers meant for later prompts), so a
@@ -16,6 +16,40 @@ git_project() {
     git -C "$dir" "$@" </dev/null
 }
 
+# exclude_from_git DIR COMMENT ENTRY...: make git ignore each ENTRY in DIR
+# without touching a tracked file: the entries go into .git/info/exclude,
+# which is never committed. An entry that already takes effect (checked by its
+# pattern, so a tracked path counts) is left out, and with none left nothing
+# is written. The comment line goes above the entries that are written. The
+# number of entries written is left in REPLY; the return status is 1 when an
+# entry still does not take effect afterwards.
+exclude_from_git() {
+  local dir="$1" comment="$2" gitdir exclude entry path missing=()
+  shift 2
+  for entry in "$@"; do
+    path="${entry#/}"
+    if ! git_project "$dir" check-ignore --no-index -q -- "${path%/}"; then
+      missing+=("$entry")
+    fi
+  done
+  REPLY="${#missing[@]}"
+  if ((REPLY == 0)); then
+    return 0
+  fi
+  gitdir="$(git_project "$dir" rev-parse --absolute-git-dir)"
+  exclude="$gitdir/info/exclude"
+  mkdir -p -- "$gitdir/info"
+  # Start on a fresh line when the file does not end with one.
+  if [[ -s $exclude && -n "$(tail -c 1 -- "$exclude")" ]]; then
+    printf '\n' >>"$exclude"
+  fi
+  printf '%s\n' "# $comment" "${missing[@]}" >>"$exclude"
+  for entry in "${missing[@]}"; do
+    path="${entry#/}"
+    git_project "$dir" check-ignore --no-index -q -- "${path%/}" || return 1
+  done
+}
+
 # fetch_origin DIR: fetch the Gitea repository into the project. Over SSH the
 # user's key is used. Over HTTPS the token reaches git through a private
 # GIT_ASKPASS helper and the environment of this one command: it is never part
diff --git a/src/lib/plan.sh b/src/lib/plan.sh
index 0c2d81b..f8fffad 100644
--- a/src/lib/plan.sh
+++ b/src/lib/plan.sh
@@ -51,6 +51,7 @@ print_plan() {
     say "$(printf '  %-18s: %s' "Framework" "add $(framework_url) as a submodule")"
     say "$(printf '  %-18s: %s' "Skills and hooks" "install once; plan gate $(yes_no "${PROJECT[is_plan_gate_enabled]}")")"
     say "$(printf '  %-18s: %s' "Templates" "AGENTS.md and docs/artifact-registry.md (you are asked before a file is replaced)")"
+    say "$(printf '  %-18s: %s' "Git excludes" "${FRAMEWORK_EXCLUDES[*]} go into .git/info/exclude (no tracked file changes)")"
   else
     say "$(printf '  %-18s: %s' "Framework" "NOT possible without SSH to Gitea; you will be asked whether to go on without it")"
   fi