From 0d07492a57c15eaf9fbc7111c203c1fc3ad43777 Mon Sep 17 00:00:00 2001
From: Chen Lai <chenlai@fb.com>
Date: Fri, 12 Sep 2025 11:50:36 -0700
Subject: [PATCH 1/9] init

---
 .github/workflows/_link_check.yml | 24 +++++++++++++++++++
 scripts/lint_file_size.sh         | 38 +++++++++++++++++++++++++++++++
 2 files changed, 62 insertions(+)
 create mode 100644 scripts/lint_file_size.sh

diff --git a/.github/workflows/_link_check.yml b/.github/workflows/_link_check.yml
index aadd6c07420..a84d3c93274 100644
--- a/.github/workflows/_link_check.yml
+++ b/.github/workflows/_link_check.yml
@@ -55,3 +55,27 @@ jobs:
           echo "Or add \`@lint-ignore\` somewhere on the same line as the reference you want to skip checking."
           exit 1
         }
+
+  lint-file-size:
+    if: ${{ github.event_name == 'pull_request' }}
+    uses: pytorch/test-infra/.github/workflows/linux_job_v2.yml@main
+    with:
+      runner: linux.2xlarge
+      docker-image: ci-image:executorch-ubuntu-22.04-linter
+      submodules: false
+      fetch-depth: 0
+      ref: ${{ inputs.ref }}
+      timeout: 30
+      script: |
+        ./scripts/lint_file_size.sh $(
+          if [ "${{ github.event_name }}" = "pull_request" ]; then
+            echo "${{ github.event.pull_request.base.sha }}" "${{ github.event.pull_request.head.sha }}"
+          else
+            echo "${{ github.event.before }}" "${{ github.sha }}"
+          fi
+        ) || {
+          echo
+          echo "File size lint failed: some files exceed the 1 MB limit."
+          echo "If you really need large files, consider using Git LFS or storing them elsewhere."
+          exit 1
+        }
diff --git a/scripts/lint_file_size.sh b/scripts/lint_file_size.sh
new file mode 100644
index 00000000000..a42ce6ca455
--- /dev/null
+++ b/scripts/lint_file_size.sh
@@ -0,0 +1,38 @@
+#!/bin/bash
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+# All rights reserved.
+#
+# This source code is licensed under the BSD-style license found in the
+# LICENSE file in the root directory of this source tree.
+
+set -euo pipefail
+
+# Default max file size in bytes (1 MB)
+MAX_SIZE=$((1024 * 1024))
+status=0
+
+green='\e[1;32m'; red='\e[1;31m'; cyan='\e[1;36m'; reset='\e[0m'
+
+if [ $# -eq 2 ]; then
+  base=$1
+  head=$2
+  echo "Checking changed files between $base...$head"
+  files=$(git diff --name-only "$base...$head")
+else
+  echo "Checking all files in repository"
+  files=$(git ls-files)
+fi
+
+for file in $files; do
+  if [ -f "$file" ]; then
+    size=$(wc -c <"$file")
+    if [ "$size" -gt "$MAX_SIZE" ]; then
+      echo -e "${red}FAIL${reset} $file (${cyan}${size} bytes${reset}) exceeds ${MAX_SIZE} bytes"
+      status=1
+    else
+      echo -e "${green}OK${reset}   $file (${size} bytes)"
+    fi
+  fi
+done
+
+exit $status

From d33dc1d18dbeefa19f51b9132ba83421fa730cc1 Mon Sep 17 00:00:00 2001
From: Chen Lai <chenlai@fb.com>
Date: Fri, 12 Sep 2025 11:57:54 -0700
Subject: [PATCH 2/9] set different file size limit for pictures

---
 scripts/lint_file_size.sh | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/scripts/lint_file_size.sh b/scripts/lint_file_size.sh
index a42ce6ca455..4b07ec5b208 100644
--- a/scripts/lint_file_size.sh
+++ b/scripts/lint_file_size.sh
@@ -8,7 +8,12 @@
 set -euo pipefail
 
 # Default max file size in bytes (1 MB)
-MAX_SIZE=$((1024 * 1024))
+if [[ "$filepath" =~ \.(png|jpg|jpeg|gif|svg)$ ]]; then
+  MAX_SIZE=$((5 * 1024 * 1024))  # 5 MB limit for pictures
+else
+  MAX_SIZE=$((1 * 1024 * 1024))  # 1 MB for others
+fi
+
 status=0
 
 green='\e[1;32m'; red='\e[1;31m'; cyan='\e[1;36m'; reset='\e[0m'

From 25372731c4cfd3d262d6ba415a960ccc0f47660b Mon Sep 17 00:00:00 2001
From: Chen Lai <chenlai@fb.com>
Date: Fri, 12 Sep 2025 12:12:45 -0700
Subject: [PATCH 3/9] increase size limit

---
 scripts/lint_file_size.sh | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/scripts/lint_file_size.sh b/scripts/lint_file_size.sh
index 4b07ec5b208..fd246153b2c 100644
--- a/scripts/lint_file_size.sh
+++ b/scripts/lint_file_size.sh
@@ -7,13 +7,6 @@
 
 set -euo pipefail
 
-# Default max file size in bytes (1 MB)
-if [[ "$filepath" =~ \.(png|jpg|jpeg|gif|svg)$ ]]; then
-  MAX_SIZE=$((5 * 1024 * 1024))  # 5 MB limit for pictures
-else
-  MAX_SIZE=$((1 * 1024 * 1024))  # 1 MB for others
-fi
-
 status=0
 
 green='\e[1;32m'; red='\e[1;31m'; cyan='\e[1;36m'; reset='\e[0m'
@@ -30,6 +23,13 @@ fi
 
 for file in $files; do
   if [ -f "$file" ]; then
+    # Set size limit depending on extension
+    if [[ "$file" =~ \.(png|jpg|jpeg|gif|svg|mp3|mp4)$ ]]; then
+      MAX_SIZE=$((8 * 1024 * 1024))  # 5 MB for pictures
+    else
+      MAX_SIZE=$((1 * 1024 * 1024))  # 1 MB for others
+    fi
+
     size=$(wc -c <"$file")
     if [ "$size" -gt "$MAX_SIZE" ]; then
       echo -e "${red}FAIL${reset} $file (${cyan}${size} bytes${reset}) exceeds ${MAX_SIZE} bytes"

From 6febe36bf6912a5423a6fd934b5dcf04afbbb2a3 Mon Sep 17 00:00:00 2001
From: Chen Lai <chenlai@fb.com>
Date: Mon, 15 Sep 2025 13:29:35 -0700
Subject: [PATCH 4/9] add exception list

---
 .github/workflows/_link_check.yml |  1 +
 scripts/lint_file_size.sh         | 25 +++++++++++++++++++++++++
 2 files changed, 26 insertions(+)

diff --git a/.github/workflows/_link_check.yml b/.github/workflows/_link_check.yml
index a84d3c93274..76ec66ffb5b 100644
--- a/.github/workflows/_link_check.yml
+++ b/.github/workflows/_link_check.yml
@@ -77,5 +77,6 @@ jobs:
           echo
           echo "File size lint failed: some files exceed the 1 MB limit."
           echo "If you really need large files, consider using Git LFS or storing them elsewhere."
+          echo "If you really need to get unblocked and check in the file, can add it to the EXCEPTIONS list in scripts/lint_file_size.sh."
           exit 1
         }
diff --git a/scripts/lint_file_size.sh b/scripts/lint_file_size.sh
index fd246153b2c..9547bc569b3 100644
--- a/scripts/lint_file_size.sh
+++ b/scripts/lint_file_size.sh
@@ -11,6 +11,27 @@ status=0
 
 green='\e[1;32m'; red='\e[1;31m'; cyan='\e[1;36m'; reset='\e[0m'
 
+# List of files to skip (relative paths)
+EXCEPTIONS=(
+  "examples/models/llama/params/demo_rand_params.pth"
+  "examples/models/llama/tokenizer/test/resources/test_tiktoken_tokenizer.model"
+  "examples/qualcomm/oss_scripts/llama/artifacts/stories260k_hybrid_llama_qnn.pte"
+  # Following needs to be clean up
+  "examples/mediatek/models/llm_models/weights/Llama-3.2-1B-Instruct/tokenizer.json"
+  "examples/mediatek/models/llm_models/weights/Llama-3.2-3B-Instruct/tokenizer.json"
+  "examples/mediatek/models/llm_models/weights/llama3-8B-instruct/tokenizer.json"
+)
+
+is_exception() {
+  local f=$1
+  for ex in "${EXCEPTIONS[@]}"; do
+    if [[ "$f" == "$ex" ]]; then
+      return 0
+    fi
+  done
+  return 1
+}
+
 if [ $# -eq 2 ]; then
   base=$1
   head=$2
@@ -22,6 +43,10 @@ else
 fi
 
 for file in $files; do
+  if is_exception "$file"; then
+    echo -e "${cyan}SKIP${reset}  $file (in exception list)"
+    continue
+  fi
   if [ -f "$file" ]; then
     # Set size limit depending on extension
     if [[ "$file" =~ \.(png|jpg|jpeg|gif|svg|mp3|mp4)$ ]]; then

From cfbadfa95a35583a337785d7d12c69a183469ac9 Mon Sep 17 00:00:00 2001
From: Chen Lai <chenlai@fb.com>
Date: Mon, 15 Sep 2025 14:12:26 -0700
Subject: [PATCH 5/9] add sleep for debugging

---
 .github/workflows/_link_check.yml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/.github/workflows/_link_check.yml b/.github/workflows/_link_check.yml
index 76ec66ffb5b..d4fa61c6ac8 100644
--- a/.github/workflows/_link_check.yml
+++ b/.github/workflows/_link_check.yml
@@ -67,6 +67,7 @@ jobs:
       ref: ${{ inputs.ref }}
       timeout: 30
       script: |
+        sleep 900
         ./scripts/lint_file_size.sh $(
           if [ "${{ github.event_name }}" = "pull_request" ]; then
             echo "${{ github.event.pull_request.base.sha }}" "${{ github.event.pull_request.head.sha }}"

From b746e9327b6a3c2b898eda6e130919dc9274d3a4 Mon Sep 17 00:00:00 2001
From: Chen Lai <chenlai@fb.com>
Date: Mon, 15 Sep 2025 14:19:21 -0700
Subject: [PATCH 6/9] add permission

---
 .github/workflows/_link_check.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/_link_check.yml b/.github/workflows/_link_check.yml
index d4fa61c6ac8..89b3655986c 100644
--- a/.github/workflows/_link_check.yml
+++ b/.github/workflows/_link_check.yml
@@ -67,7 +67,7 @@ jobs:
       ref: ${{ inputs.ref }}
       timeout: 30
       script: |
-        sleep 900
+        chmod +x ./scripts/lint_file_size.sh
         ./scripts/lint_file_size.sh $(
           if [ "${{ github.event_name }}" = "pull_request" ]; then
             echo "${{ github.event.pull_request.base.sha }}" "${{ github.event.pull_request.head.sha }}"

From 5bba482655cd4ce004d2a1eabce35b21f4c69915 Mon Sep 17 00:00:00 2001
From: Chen Lai <chenlai@fb.com>
Date: Mon, 15 Sep 2025 14:32:29 -0700
Subject: [PATCH 7/9] add comments for explaining the rules

---
 scripts/lint_file_size.sh | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/scripts/lint_file_size.sh b/scripts/lint_file_size.sh
index 9547bc569b3..78adf341ae6 100644
--- a/scripts/lint_file_size.sh
+++ b/scripts/lint_file_size.sh
@@ -11,6 +11,11 @@ status=0
 
 green='\e[1;32m'; red='\e[1;31m'; cyan='\e[1;36m'; reset='\e[0m'
 
+# Following is the rules for the file size linting:
+# 1. For all files, the file size can't be larger than 1MB
+# 2. For images/vidoes, the files size can't be larger than 7MB
+# 3. There is an exception list defined in the script if it's really needed
+
 # List of files to skip (relative paths)
 EXCEPTIONS=(
   "examples/models/llama/params/demo_rand_params.pth"

From 8e846bfa96e46c6b1c9e533d9775779f04d819cd Mon Sep 17 00:00:00 2001
From: Chen Lai <chenlai@fb.com>
Date: Tue, 16 Sep 2025 15:29:55 -0700
Subject: [PATCH 8/9] typos and update linux machine

---
 .github/workflows/_link_check.yml | 2 +-
 scripts/lint_file_size.sh         | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/.github/workflows/_link_check.yml b/.github/workflows/_link_check.yml
index 89b3655986c..7c08613bd78 100644
--- a/.github/workflows/_link_check.yml
+++ b/.github/workflows/_link_check.yml
@@ -60,7 +60,7 @@ jobs:
     if: ${{ github.event_name == 'pull_request' }}
     uses: pytorch/test-infra/.github/workflows/linux_job_v2.yml@main
     with:
-      runner: linux.2xlarge
+      runner: linux.large
       docker-image: ci-image:executorch-ubuntu-22.04-linter
       submodules: false
       fetch-depth: 0
diff --git a/scripts/lint_file_size.sh b/scripts/lint_file_size.sh
index 78adf341ae6..e1d666fe6b6 100644
--- a/scripts/lint_file_size.sh
+++ b/scripts/lint_file_size.sh
@@ -13,7 +13,7 @@ green='\e[1;32m'; red='\e[1;31m'; cyan='\e[1;36m'; reset='\e[0m'
 
 # Following is the rules for the file size linting:
 # 1. For all files, the file size can't be larger than 1MB
-# 2. For images/vidoes, the files size can't be larger than 7MB
+# 2. For images/videos, the file size can't be larger than 8MB
 # 3. There is an exception list defined in the script if it's really needed
 
 # List of files to skip (relative paths)
@@ -55,7 +55,7 @@ for file in $files; do
   if [ -f "$file" ]; then
     # Set size limit depending on extension
     if [[ "$file" =~ \.(png|jpg|jpeg|gif|svg|mp3|mp4)$ ]]; then
-      MAX_SIZE=$((8 * 1024 * 1024))  # 5 MB for pictures
+      MAX_SIZE=$((8 * 1024 * 1024))  # 8 MB for pictures
     else
       MAX_SIZE=$((1 * 1024 * 1024))  # 1 MB for others
     fi

From 4d3f6221e449189a6196e62e737a6cc97795d59e Mon Sep 17 00:00:00 2001
From: Chen Lai <chenlai@fb.com>
Date: Tue, 16 Sep 2025 15:37:24 -0700
Subject: [PATCH 9/9] use linux 2xlarge

---
 .github/workflows/_link_check.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/_link_check.yml b/.github/workflows/_link_check.yml
index 7c08613bd78..89b3655986c 100644
--- a/.github/workflows/_link_check.yml
+++ b/.github/workflows/_link_check.yml
@@ -60,7 +60,7 @@ jobs:
     if: ${{ github.event_name == 'pull_request' }}
     uses: pytorch/test-infra/.github/workflows/linux_job_v2.yml@main
     with:
-      runner: linux.large
+      runner: linux.2xlarge
       docker-image: ci-image:executorch-ubuntu-22.04-linter
       submodules: false
       fetch-depth: 0