diff --git a/esphome/espidf/framework.py b/esphome/espidf/framework.py
index 39c036e6d7..5ea182379a 100644
--- a/esphome/espidf/framework.py
+++ b/esphome/espidf/framework.py
@@ -739,9 +739,8 @@ def _prefetch_idf_tool_archives(
                 # seek/truncate writes; mirror the library prefetch's dedupe
                 continue
             seen_dests.add(entry["dest"])
-            # tools.json always carries sha256 and size; an entry missing
-            # either must not be downloaded unverified here, so leave it to
-            # the installer (which fails loudly on a bad archive).
+            # Never download unverified: an entry without sha256/size is
+            # left to the installer, which fails loudly on a bad archive
             if entry.get("sha256") and entry.get("size"):
                 entries.append(entry)
             else:
@@ -758,10 +757,8 @@ def _prefetch_idf_tool_archives(
             ", ".join(entry["name"] for entry in entries),
         )
 
-        # Every entry carries a size (checked above), so the combined bar can
-        # be trusted. Unlike the library prefetch there is no sequential
-        # fallback: per-file bars from several threads would interleave, and
-        # skipping the prefetch would lose the resume workaround for #17703.
+        # No sequential fallback here: skipping the prefetch would lose the
+        # resume workaround for #17703, and every entry has a size (above)
         def _download(entry: dict):
             return lambda tracker: download_with_resume(
                 entry["url"],
diff --git a/esphome/framework_helpers.py b/esphome/framework_helpers.py
index af8854af06..56a8a802d4 100644
--- a/esphome/framework_helpers.py
+++ b/esphome/framework_helpers.py
@@ -712,9 +712,8 @@ def _stream_response_to_file(
     (effective offset 0) discards the stale bytes. ``offset`` also seeds the
     progress bar so a resumed download shows overall progress. ``size`` is
     the known full file size; when None it is derived from the response's
-    content-length, and without either there is no progress bar. With
-    ``progress`` set, no bar is drawn here; the callback gets the absolute
-    byte count, seeded with ``offset`` and then after each chunk.
+    content-length, and without either there is no bar. With ``progress``
+    set no bar is drawn here; the callback gets the absolute byte count.
     """
     f.seek(offset)
     f.truncate(offset)
@@ -748,16 +747,12 @@ def run_batch_downloads(
     jobs: list[tuple[str, Callable[[Callable[[int], None]], None]]],
     max_workers: int = BATCH_DOWNLOAD_WORKERS,
 ) -> list[tuple[str, Exception]]:
-    """Run download jobs concurrently, reporting into one combined bar.
+    """Run ``(name, fetch)`` download jobs concurrently under one combined bar.
 
-    ``jobs`` holds ``(name, fetch)`` pairs where ``fetch(tracker)`` performs
-    one download reporting absolute byte counts to ``tracker``. Failures are
-    collected (list.append is atomic under the GIL) and returned after the
-    bar is done, so the caller's warnings never land on the bar's row; a
-    failed job credits its tracker 0 so the bar can still complete. Ctrl-C
-    drops queued jobs and aborts in-flight ones at their next progress
-    tick; resumable ``.part`` files keep the bytes already fetched.
-    ``jobs`` must be non-empty.
+    Each ``fetch(tracker)`` reports absolute byte counts. Failures are
+    returned after the bar is done so warnings never land on its row.
+    Ctrl-C drops queued jobs and aborts in-flight ones at their next tick;
+    ``.part`` files keep the fetched bytes. ``jobs`` must be non-empty.
     """
     failures: list[tuple[str, Exception]] = []
     cancelled = threading.Event()
@@ -798,14 +793,11 @@ class _BatchDownloadCancelled(Exception):
 
 
 class BatchDownloadProgress:
-    """One progress bar across several concurrent ``download_with_resume`` calls.
+    """One bar across several concurrent downloads, summing tracker bytes.
 
-    Each ``tracker()`` is a ``progress`` callback for one download; it reports
-    that file's absolute byte count and the bar shows the sum over ``total``.
-    The lock also serialises the bar's stderr writes, so worker threads never
-    interleave frames. With an unknown ``total`` (0) nothing is drawn. Call
-    ``done()`` once every download has finished (or failed) so a bar that
-    never reached 100% still ends its line before the next log message.
+    The lock also serialises stderr writes so workers never interleave
+    frames; a ``total`` of 0 draws nothing. Call ``done()`` at the end so a
+    bar short of 100% still ends its line.
     """
 
     def __init__(self, header: str, total: int) -> None:
@@ -872,11 +864,8 @@ def download_with_resume(
     of consuming attempts — for callers with their own fallback, like
     ``download_from_mirrors``.
 
-    ``progress``, when given, replaces the built-in progress bar: it is called
-    with the absolute number of bytes of ``dest`` obtained so far (including
-    a resumed prefix, and the final size once the file is verified), so a
-    caller running several downloads at once can draw one combined bar (see
-    ``BatchDownloadProgress``).
+    ``progress`` replaces the built-in bar: it receives the absolute bytes of
+    ``dest`` obtained so far (see ``BatchDownloadProgress``).
 
     Raises EsphomeError when all attempts are exhausted.
     """
diff --git a/esphome/platformio/library.py b/esphome/platformio/library.py
index ce57cedfb4..c3c2d8edb1 100644
--- a/esphome/platformio/library.py
+++ b/esphome/platformio/library.py
@@ -926,10 +926,8 @@ def _prefetch_wave(
 ) -> None:
     """Best-effort parallel download of a wave's registry archives.
 
-    The walk's own ``download()`` call stays authoritative (it surfaces real
-    failures, with resume); bars are suppressed since parallel bars would
-    interleave. Duplicate URLs prefetch once so two threads never extract
-    into the same cache directory.
+    The walk's own ``download()`` stays authoritative; duplicate URLs
+    prefetch once so two threads never share a cache directory.
     """
     components: list[ConvertedLibrary] = []
     seen: set[str] = set()
@@ -954,9 +952,8 @@ def _prefetch_wave(
         components.append(component)
     if len(components) < 2:
         return
-    # One combined bar over the batch, sized by HEAD requests. An unknown
-    # size would mean a silent multi-MB download; fall back to sequential
-    # downloads with their per-file bars instead.
+    # Combined bar sized by HEAD requests; unknown sizes fall back to
+    # sequential per-file bars rather than a silent multi-MB download
     sizes = _content_lengths([c.source.url for c in components])
     if not all(sizes):
         # Announced before the sequential per-file downloads take over, so
@@ -1087,8 +1084,7 @@ def convert_libraries(
     worklist = deque(dict.fromkeys(top_level))
     while worklist:
         # Drain the frontier sequentially (spec resolution mutates shared
-        # node state), then prefetch the wave's registry archives in
-        # parallel; the per-component download() below stays authoritative.
+        # state), then prefetch the wave in parallel
         wave: list[tuple[str, ConvertedLibrary]] = []
         while worklist:
             key = worklist.popleft()
@@ -1117,9 +1113,8 @@ def convert_libraries(
         for key, component in wave:
             node = nodes[key]
             if frozenset(node.requirements) != resolved_requirements[key]:
-                # An earlier wave entry grew this node's requirements after
-                # the drain resolved it; skip parsing and walking a manifest
-                # the next wave will replace (its archive is already fetched)
+                # Requirements grew mid-wave: skip parsing a manifest the
+                # next wave will replace (its archive is already fetched)
                 worklist.append(key)
                 continue
             component.download(salt=salt, namespace=backend.cache_key)