diff --git a/.github/scripts/dispatch.py b/.github/scripts/dispatch.py
index d4a25558..c316c34c 100644
--- a/.github/scripts/dispatch.py
+++ b/.github/scripts/dispatch.py
@@ -166,6 +166,7 @@ def _build_inputs(
     head_sha: str,
     target_branch: str,
     upload: bool,
+    bot_comment_id: str,
 ) -> dict:
     inputs = {
         "kernel_name": kernel_name,
@@ -184,6 +185,8 @@ def _build_inputs(
         inputs["target_branch"] = target_branch
     if not upload:
         inputs["upload"] = "false"
+    if upload and bot_comment_id:
+        inputs["bot_comment_id"] = bot_comment_id
     return inputs
 
 
@@ -247,6 +250,7 @@ def _plan_build_actions(
     head_sha: str,
     target_branch: str,
     upload: bool,
+    bot_comment_id: str,
     requested_backends: list[str] | None = None,
 ) -> None:
     backends = read_backends(kernel_name)
@@ -299,6 +303,7 @@ def _plan_build_actions(
                         head_sha=head_sha,
                         target_branch=target_branch,
                         upload=upload,
+                        bot_comment_id=bot_comment_id,
                     ),
                 },
                 description=f"for kernel `{kernel_name}` on ref `{ref}`",
@@ -319,6 +324,7 @@ def plan_dispatch(
     head_sha: str = "",
     target_branch: str = "",
     upload: bool = True,
+    bot_comment_id: str = "",
     run_security: bool = False,
     security_only: bool = False,
     requested_backends: list[str] | None = None,
@@ -339,6 +345,7 @@ def plan_dispatch(
             head_sha=head_sha,
             target_branch=target_branch,
             upload=upload,
+            bot_comment_id=bot_comment_id,
             requested_backends=requested_backends,
         )
 
@@ -487,6 +494,7 @@ def dispatch(
     head_sha: str = "",
     target_branch: str = "",
     upload: bool = True,
+    bot_comment_id: str = "",
     run_security: bool = False,
     security_only: bool = False,
     requested_backends: list[str] | None = None,
@@ -509,6 +517,7 @@ def dispatch(
         head_sha=head_sha,
         target_branch=target_branch,
         upload=upload,
+        bot_comment_id=bot_comment_id,
         run_security=run_security,
         security_only=security_only,
         requested_backends=requested_backends,
@@ -607,6 +616,11 @@ def main() -> int:
         default="",
         help="PR head SHA for commit status reporting",
     )
+    parser.add_argument(
+        "--bot-comment-id",
+        default="",
+        help="Issue comment ID to update with Hub upload links",
+    )
     parser.add_argument(
         "--target-branch",
         default="",
@@ -675,6 +689,7 @@ def main() -> int:
         skip_build=args.skip_build,
         pr_number=args.pr_number,
         head_sha=args.head_sha,
+        bot_comment_id=args.bot_comment_id,
         target_branch=args.target_branch,
         upload=not args.no_upload,
         run_security=args.security,
diff --git a/.github/scripts/format_hub_upload_comment.py b/.github/scripts/format_hub_upload_comment.py
new file mode 100644
index 00000000..59cb6449
--- /dev/null
+++ b/.github/scripts/format_hub_upload_comment.py
@@ -0,0 +1,77 @@
+#!/usr/bin/env python3
+# Input:
+#   [--base <comment-body>] <kernel> <repo-prefix> <upload-json-or-path>...
+#
+# Output:
+#   A Hub upload section, or <comment-body> with that section updated.
+#
+# Example:
+#   python3 .github/scripts/format_hub_upload_comment.py msa kernels-community "$RUNNER_TEMP"/upload*.json
+#   python3 .github/scripts/format_hub_upload_comment.py --base "$BODY" msa kernels-community "$RUNNER_TEMP"/upload*.json
+#   python3 .github/scripts/format_hub_upload_comment.py msa kernels-community '{"pull_requests":[{"url":"https://hf.co/kernels/MiniMaxAI/msa/discussions/1"}]}'
+import argparse
+import json
+from pathlib import Path
+
+from hub_pr_upload_args import repo_id
+
+SECTION = "Hub uploads:"
+
+
+def load_json(value):
+    if not value.lstrip().startswith(("{", "[")):
+        path = Path(value)
+        if path.is_file():
+            with open(path) as f:
+                return json.load(f)
+    return json.loads(value)
+
+
+def dedupe(lines):
+    return list(dict.fromkeys(lines))
+
+
+def upload_lines(kernel, repo_prefix, uploads):
+    urls = [
+        pr["url"]
+        for upload in uploads
+        for pr in load_json(upload).get("pull_requests", [])
+    ]
+    lines = [
+        f"- Hub repo: https://huggingface.co/kernels/{repo_id(kernel, repo_prefix)}"
+    ]
+    lines.extend(f"- Hub pull request: {url}" for url in urls)
+    return dedupe(lines)
+
+
+def update_comment(base, lines):
+    body_lines = base.rstrip().splitlines()
+    if SECTION in body_lines:
+        section = body_lines.index(SECTION)
+        prefix = body_lines[:section]
+        existing = [line for line in body_lines[section + 1 :] if line.startswith("- ")]
+    else:
+        prefix = body_lines
+        existing = []
+    body = "\n".join(prefix).rstrip()
+    section = "\n".join([SECTION, *dedupe(existing + lines)])
+    return f"{body}\n\n{section}".strip()
+
+
+def main():
+    parser = argparse.ArgumentParser()
+    parser.add_argument("--base")
+    parser.add_argument("kernel")
+    parser.add_argument("repo_prefix")
+    parser.add_argument("uploads", nargs="+")
+    args = parser.parse_args()
+
+    lines = upload_lines(args.kernel, args.repo_prefix, args.uploads)
+    if args.base is not None:
+        print(update_comment(args.base, lines))
+    else:
+        print("\n".join([SECTION, *lines]))
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())
diff --git a/.github/scripts/hub_pr_upload_args.py b/.github/scripts/hub_pr_upload_args.py
new file mode 100644
index 00000000..1f91b801
--- /dev/null
+++ b/.github/scripts/hub_pr_upload_args.py
@@ -0,0 +1,35 @@
+#!/usr/bin/env python3
+# Input:
+#   <repo-id|upload-args> <kernel> <repo-prefix>
+#
+# Output:
+#   The effective Hub repo-id, or upload args using --create-pr for external repos.
+#
+# Example:
+#   python3 .github/scripts/hub_pr_upload_args.py upload-args msa kernels-community
+import sys
+import tomllib
+from pathlib import Path
+
+COMMUNITY = "kernels-community"
+ROOT = Path(__file__).resolve().parents[2]
+
+
+def external_repo_id(kernel):
+    with open(ROOT / kernel / "build.toml", "rb") as f:
+        repo_id = tomllib.load(f).get("general", {}).get("hub", {}).get("repo-id")
+    return repo_id if isinstance(repo_id, str) and repo_id and not repo_id.startswith(f"{COMMUNITY}/") else ""
+
+
+def repo_id(kernel, repo_prefix):
+    return external_repo_id(kernel) or f"{repo_prefix}/{kernel}"
+
+
+if __name__ == "__main__":
+    mode, kernel, repo_prefix = sys.argv[1:]
+    if mode == "repo-id":
+        print(repo_id(kernel, repo_prefix))
+    elif mode == "upload-args":
+        print("--create-pr" if external_repo_id(kernel) else f"--repo-id {repo_prefix}/{kernel}")
+    else:
+        sys.exit(f"unknown mode: {mode}")
diff --git a/.github/scripts/pr_comment_kernel_bot.py b/.github/scripts/pr_comment_kernel_bot.py
index 12de8c9e..b76dbf9c 100644
--- a/.github/scripts/pr_comment_kernel_bot.py
+++ b/.github/scripts/pr_comment_kernel_bot.py
@@ -904,6 +904,7 @@ def main(*, dry_run: bool = False):
             head_sha=pr_head_sha or "",
             target_branch=target_branch,
             upload=dispatch_upload,
+            bot_comment_id=str(status_comment_id or "") if dispatch_upload else "",
             requested_backends=kernel_backends.get(kernel_name),
             # The audit is per-PR, so request it only once (on the first kernel).
             run_security=run_security and index == 0,
diff --git a/.github/scripts/test_dispatch.py b/.github/scripts/test_dispatch.py
index 906095ce..135e6473 100644
--- a/.github/scripts/test_dispatch.py
+++ b/.github/scripts/test_dispatch.py
@@ -184,6 +184,19 @@ def test_requested_backends_thread_through_dispatch_dry_run():
     assert any("xpu" in c.split(",") for c in csvs)
 
 
+def test_bot_comment_id_threads_to_build_inputs_only_when_set():
+    without = _build_actions(_plan(backends=["cuda"]))
+    assert all("bot_comment_id" not in a.body["inputs"] for a in without)
+
+    with_id = _build_actions(_plan(backends=["cuda"], bot_comment_id="12345"))
+    assert all(a.body["inputs"]["bot_comment_id"] == "12345" for a in with_id)
+
+    no_upload = _build_actions(
+        _plan(backends=["cuda"], upload=False, bot_comment_id="12345")
+    )
+    assert all("bot_comment_id" not in a.body["inputs"] for a in no_upload)
+
+
 # select_workflows: backend-union and Windows-gate cases (single-backend rows omitted).
 ROUTING_TRUTH_TABLE = [
     (["cuda"], False, {"build.yaml"}),
diff --git a/.github/workflows/build-mac.yaml b/.github/workflows/build-mac.yaml
index 2957d1b4..e6bf5c68 100644
--- a/.github/workflows/build-mac.yaml
+++ b/.github/workflows/build-mac.yaml
@@ -52,6 +52,11 @@ on:
         required: false
         type: string
         default: ""
+      bot_comment_id:
+        description: "Issue comment ID to update with Hub upload links"
+        required: false
+        type: string
+        default: ""
 
 permissions:
   contents: read
@@ -206,12 +211,15 @@ jobs:
           REPO_PREFIX: ${{ inputs.repo_prefix }}
           TARGET_BRANCH: ${{ inputs.target_branch }}
         run: |
-          cd "$KERNEL"
           BRANCH_FLAG=""
           if [ -n "$TARGET_BRANCH" ]; then
             BRANCH_FLAG="--branch $TARGET_BRANCH"
           fi
-          nix run -L github:huggingface/kernels#kernel-builder -- upload --repo-type kernel --repo-id "$REPO_PREFIX/$KERNEL" $BRANCH_FLAG
+          TARGET_FLAG=$(python3 .github/scripts/hub_pr_upload_args.py upload-args "$KERNEL" "$REPO_PREFIX")
+          cd "$KERNEL"
+          nix run -L github:huggingface/kernels#kernel-builder -- upload \
+            --repo-type kernel $TARGET_FLAG $BRANCH_FLAG \
+            --output-json "$RUNNER_TEMP/upload.json"
 
       # v1 kernels without an explicit branch override also get uploaded to main.
       - name: Upload v1 kernels to main
@@ -221,21 +229,39 @@ jobs:
           KERNEL: ${{ steps.validate.outputs.kernel }}
           REPO_PREFIX: ${{ inputs.repo_prefix }}
         run: |
+          TARGET_FLAG=$(python3 .github/scripts/hub_pr_upload_args.py upload-args "$KERNEL" "$REPO_PREFIX")
           cd "$KERNEL"
 
           if [ -f "build.toml" ]; then
             VERSION=$(grep -E '^\s*version\s*=\s*1\s*$' build.toml || true)
             BRANCH=$(grep -E '^\s*branch\s*=' build.toml || true)
             if [ -n "$VERSION" ] && [ -z "$BRANCH" ]; then
-              nix run -L github:huggingface/kernels#kernel-builder -- upload --repo-type kernel --repo-id "$REPO_PREFIX/$KERNEL" --branch main
+              nix run -L github:huggingface/kernels#kernel-builder -- upload \
+                --repo-type kernel $TARGET_FLAG --branch main \
+                --output-json "$RUNNER_TEMP/upload-main.json"
             fi
           fi
 
+      - name: Upload Hub upload summary
+        if: steps.validate.outputs.skip == 'false' && inputs.skip_build != true && inputs.mode != 'pr' && inputs.upload != false
+        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
+        with:
+          name: hub-upload-macos
+          path: ${{ runner.temp }}/upload*.json
+          retention-days: 1
+
   # Report the final build outcome as a commit status on the PR head SHA.
   report-status:
     if: always() && inputs.head_sha != ''
     needs: [build-kernel]
     runs-on: ubuntu-latest
+    permissions:
+      actions: read
+      contents: read
+      issues: write
+      statuses: write
+    env:
+      REPORT_HUB_UPLOAD: ${{ needs.build-kernel.result == 'success' && inputs.bot_comment_id != '' && inputs.mode != 'pr' && inputs.upload != false }}
     steps:
       - name: Set commit status
         env:
@@ -263,3 +289,28 @@ jobs:
             -f target_url="$RUN_URL" \
             -f description="$DESC" \
             -f context="$STATUS_CONTEXT"
+
+      - name: Checkout comment helpers
+        if: env.REPORT_HUB_UPLOAD == 'true'
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
+        with:
+          ref: ${{ inputs.pr_number != '' && format('refs/pull/{0}/head', inputs.pr_number) || github.ref }}
+
+      - name: Download Hub upload summaries
+        if: env.REPORT_HUB_UPLOAD == 'true'
+        uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8.0.1
+        with:
+          pattern: hub-upload-*
+          path: hub-uploads
+
+      - name: Update bot comment with Hub URLs
+        if: env.REPORT_HUB_UPLOAD == 'true'
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          BOT_COMMENT_ID: ${{ inputs.bot_comment_id }}
+          KERNEL: ${{ inputs.kernel_name }}
+          REPO_PREFIX: ${{ inputs.repo_prefix }}
+        run: |
+          BODY=$(gh api "repos/$GITHUB_REPOSITORY/issues/comments/$BOT_COMMENT_ID" --jq .body)
+          BODY=$(python3 .github/scripts/format_hub_upload_comment.py --base "$BODY" "$KERNEL" "$REPO_PREFIX" hub-uploads/**/*.json)
+          gh api -X PATCH "repos/$GITHUB_REPOSITORY/issues/comments/$BOT_COMMENT_ID" -f body="$BODY"
diff --git a/.github/workflows/build-windows.yaml b/.github/workflows/build-windows.yaml
index fe75c55e..87234e9a 100644
--- a/.github/workflows/build-windows.yaml
+++ b/.github/workflows/build-windows.yaml
@@ -52,6 +52,11 @@ on:
         required: false
         type: string
         default: ""
+      bot_comment_id:
+        description: "Issue comment ID to update with Hub upload links"
+        required: false
+        type: string
+        default: ""
 
 permissions:
   contents: read
diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index f0b80d4b..ae951168 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -52,6 +52,11 @@ on:
         required: false
         type: string
         default: ""
+      bot_comment_id:
+        description: "Issue comment ID to update with Hub upload links"
+        required: false
+        type: string
+        default: ""
 
 permissions:
   contents: read
@@ -266,12 +271,15 @@ jobs:
           REPO_PREFIX: ${{ inputs.repo_prefix }}
           TARGET_BRANCH: ${{ inputs.target_branch }}
         run: |
-          cd "$KERNEL"
           BRANCH_FLAG=""
           if [ -n "$TARGET_BRANCH" ]; then
             BRANCH_FLAG="--branch $TARGET_BRANCH"
           fi
-          nix run -L github:huggingface/kernels#kernel-builder -- upload --repo-type kernel --repo-id "$REPO_PREFIX/$KERNEL" $BRANCH_FLAG
+          TARGET_FLAG=$(python3 .github/scripts/hub_pr_upload_args.py upload-args "$KERNEL" "$REPO_PREFIX")
+          cd "$KERNEL"
+          nix run -L github:huggingface/kernels#kernel-builder -- upload \
+            --repo-type kernel $TARGET_FLAG $BRANCH_FLAG \
+            --output-json "$RUNNER_TEMP/upload.json"
 
       # v1 kernels without an explicit branch override also get uploaded to main.
       - name: Upload v1 kernels to main
@@ -281,6 +289,7 @@ jobs:
           KERNEL: ${{ needs.setup.outputs.kernel }}
           REPO_PREFIX: ${{ inputs.repo_prefix }}
         run: |
+          TARGET_FLAG=$(python3 .github/scripts/hub_pr_upload_args.py upload-args "$KERNEL" "$REPO_PREFIX")
           cd "$KERNEL"
 
           # Check if build.toml exists, has version = 1, and does not specify a branch.
@@ -288,10 +297,20 @@ jobs:
             VERSION=$(grep -E '^\s*version\s*=\s*1\s*$' build.toml || true)
             BRANCH=$(grep -E '^\s*branch\s*=' build.toml || true)
             if [ -n "$VERSION" ] && [ -z "$BRANCH" ]; then
-              nix run -L github:huggingface/kernels#kernel-builder -- upload --repo-type kernel --repo-id "$REPO_PREFIX/$KERNEL" --branch main
+              nix run -L github:huggingface/kernels#kernel-builder -- upload \
+                --repo-type kernel $TARGET_FLAG --branch main \
+                --output-json "$RUNNER_TEMP/upload-main.json"
             fi
           fi
 
+      - name: Upload Hub upload summary
+        if: inputs.mode != 'pr' && inputs.upload != false
+        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
+        with:
+          name: hub-upload-${{ matrix.backend }}-${{ matrix.arch }}
+          path: ${{ runner.temp }}/upload*.json
+          retention-days: 1
+
   # Build the ci-test derivation and export its Nix closure as an artifact
   # so the GPU test job can import it on a GPU-enabled runner.
   build-ci-test:
@@ -406,6 +425,13 @@ jobs:
     if: always() && inputs.head_sha != ''
     needs: [build-kernel, test-kernel-gpu]
     runs-on: ubuntu-latest
+    permissions:
+      actions: read
+      contents: read
+      issues: write
+      statuses: write
+    env:
+      REPORT_HUB_UPLOAD: ${{ needs.build-kernel.result == 'success' && inputs.bot_comment_id != '' && inputs.mode != 'pr' && inputs.upload != false }}
     steps:
       - name: Set commit status
         env:
@@ -434,3 +460,28 @@ jobs:
             -f target_url="$RUN_URL" \
             -f description="$DESC" \
             -f context="$STATUS_CONTEXT"
+
+      - name: Checkout comment helpers
+        if: env.REPORT_HUB_UPLOAD == 'true'
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
+        with:
+          ref: ${{ inputs.pr_number != '' && format('refs/pull/{0}/head', inputs.pr_number) || github.ref }}
+
+      - name: Download Hub upload summaries
+        if: env.REPORT_HUB_UPLOAD == 'true'
+        uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8.0.1
+        with:
+          pattern: hub-upload-*
+          path: hub-uploads
+
+      - name: Update bot comment with Hub URLs
+        if: env.REPORT_HUB_UPLOAD == 'true'
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          BOT_COMMENT_ID: ${{ inputs.bot_comment_id }}
+          KERNEL: ${{ inputs.kernel_name }}
+          REPO_PREFIX: ${{ inputs.repo_prefix }}
+        run: |
+          BODY=$(gh api "repos/$GITHUB_REPOSITORY/issues/comments/$BOT_COMMENT_ID" --jq .body)
+          BODY=$(python3 .github/scripts/format_hub_upload_comment.py --base "$BODY" "$KERNEL" "$REPO_PREFIX" hub-uploads/**/*.json)
+          gh api -X PATCH "repos/$GITHUB_REPOSITORY/issues/comments/$BOT_COMMENT_ID" -f body="$BODY"
diff --git a/.github/workflows/sign-old-builds.yaml b/.github/workflows/sign-old-builds.yaml
index 6ecd8a47..d02e027c 100644
--- a/.github/workflows/sign-old-builds.yaml
+++ b/.github/workflows/sign-old-builds.yaml
@@ -74,8 +74,11 @@ jobs:
             VERSION=$(grep -E '^\s*version\s*=' "$kernel/build.toml" | grep -oE '[0-9]+')
             VERSION_BRANCH="v${VERSION}"
 
+            REPO_ID=$(python3 .github/scripts/hub_pr_upload_args.py repo-id "$kernel" "$REPO_PREFIX")
+            TARGET_FLAG=$(python3 .github/scripts/hub_pr_upload_args.py upload-args "$kernel" "$REPO_PREFIX")
+
             # Download existing kernel artifacts from the version branch.
-            ( cd "$kernel" && uvx --with huggingface_hub python3 -c "from huggingface_hub import snapshot_download; snapshot_download('$REPO_PREFIX/$kernel', repo_type='kernel', local_dir='.', revision='$VERSION_BRANCH')" )
+            ( cd "$kernel" && uvx --with huggingface_hub python3 -c "from huggingface_hub import snapshot_download; snapshot_download('$REPO_ID', repo_type='kernel', local_dir='.', revision='$VERSION_BRANCH')" )
 
             # Remove build variants that are not suitable for hashing:
             # - no __init__.py (not a Python kernel build)
@@ -108,13 +111,13 @@ jobs:
 
             # Upload signed artifacts back to the Hub (kernel repo type).
             ( cd "$kernel" && nix run -L github:huggingface/kernels#kernel-builder -- \
-                upload --repo-type kernel --repo-id "$REPO_PREFIX/$kernel" --branch "$VERSION_BRANCH" )
+                upload --repo-type kernel $TARGET_FLAG --branch "$VERSION_BRANCH" )
 
             # v1 kernels without an explicit branch in build.toml also get uploaded to main.
             BRANCH=$(grep -E '^\s*branch\s*=' "$kernel/build.toml" || true)
             if [ "$VERSION" = "1" ] && [ -z "$BRANCH" ]; then
               ( cd "$kernel" && nix run -L github:huggingface/kernels#kernel-builder -- \
-                  upload --repo-type kernel --repo-id "$REPO_PREFIX/$kernel" --branch main )
+                  upload --repo-type kernel $TARGET_FLAG --branch main )
             fi
 
             # Clean up to reclaim disk space before the next kernel.
diff --git a/msa/build.toml b/msa/build.toml
index 23438a74..8d74f25f 100644
--- a/msa/build.toml
+++ b/msa/build.toml
@@ -10,7 +10,7 @@ upstream = "https://github.com/MiniMax-AI/MSA"
 version = 0
 
 [general.hub]
-repo-id = "kernels-community/msa"
+repo-id = "MiniMaxAI/msa"
 
 [general.cuda]
 minver = "12.8"
diff --git a/sgl-flash-attn3/build.toml b/sgl-flash-attn3/build.toml
index 353c699f..624adf64 100644
--- a/sgl-flash-attn3/build.toml
+++ b/sgl-flash-attn3/build.toml
@@ -8,7 +8,7 @@ backends = ["cuda"]
 minver = "12.8"
 
 [general.hub]
-repo-id = "kernels-community/sgl-flash-attn3"
+repo-id = "sgl-project/sgl-flash-attn3"
 
 [torch]
 src = [