ProjectStructure/.specstory/history/2025-12-29_17-30Z-zipseq-thumbs-db-exclusion.md

Zipseq Thumbs.db exclusion (2025-12-29 17:30Z)

User (2025-12-29 17:37Z)

zipseq needs to completely ignore Thumbs.db. It should be removed from any existing manifests. If the manifest is changed, but only Thumbs.db is changed (removed) it should not be rezipped.

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Agent (model default, mode Agent)

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Examining zip_sequences.py to understand how it handles manifests and files.

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Tool use: **read_file** • Read file: zip_sequences.py

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Updating zip_sequences.py to ignore Thumbs.db files. Modifying file iteration, state loading, and state comparison.

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Tool use: **read_file** • Read file: zip_sequences.py

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Tool use: **read_file** • Read file: zip_sequences.py

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Tool use: **read_file** • Read file: zip_sequences.py

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Tool use: **read_file** • Read file: zip_sequences.py

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Updating the code to ignore Thumbs.db files:

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Tool use: **search_replace** • Edit file: zip_sequences.py

Chunk 1 Lines added: 3, lines removed: undefined

@@ -522,4 +522,7 @@
              continue
          for filename in filenames:
+             # Ignore Thumbs.db files completely
+             if filename.lower() == "thumbs.db":
+                 continue
              yield path / filename
  

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Tool use: **search_replace** • Edit file: zip_sequences.py

Chunk 1 Lines added: 6, lines removed: undefined

@@ -567,4 +567,10 @@
      try:
          state = json.loads(state_path.read_text())
+         # Remove Thumbs.db entries from loaded state
+         if "files" in state:
+             state["files"] = [
+                 entry for entry in state.get("files", [])
+                 if Path(entry.get("path", "")).name.lower() != "thumbs.db"
+             ]
          # Normalize timestamps in loaded state to ensure consistency
          # This handles state files created before normalization was added

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Tool use: **search_replace** • Edit file: zip_sequences.py

Chunk 1 Lines added: 4, lines removed: 1

@@ -597,7 +597,10 @@
      
      def normalize_state(state: dict) -> dict:
-         """Normalize timestamps in state to filesystem precision."""
+         """Normalize timestamps in state to filesystem precision and filter out Thumbs.db."""
          normalized = {"files": []}
          for entry in state.get("files", []):
+             # Ignore Thumbs.db files in state comparison
+             if Path(entry.get("path", "")).name.lower() == "thumbs.db":
+                 continue
              mtime_ns = entry["mtime_ns"]
              if is_windows:

Chunk 2 Lines added: 1, lines removed: 1

@@ -610,5 +613,5 @@
          return normalized
      
-     # Compare normalized states
+     # Compare normalized states (Thumbs.db already filtered out)
      normalized_seq = normalize_state(seq_state)
      normalized_stored = normalize_state(stored_state)

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Checking for lint errors and verifying that zip_sequence uses the filtered file list:

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Tool use: **read_lints** • Read lints for 1 file

Lint paths:

• zip_sequences.py

Lint results

No lint errors found

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Tool use: **read_file** • Read file: zip_sequences.py

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Verifying that zip_sequence uses the filtered iterator:

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Tool use: **read_file** • Read file: zip_sequences.py

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Summary of Changes

1. iter_sequence_files() — Skips Thumbs.db files during iteration, so they're never included in new states or archives.

2. load_state() — Removes any Thumbs.db entries from existing manifests when loading state files.

3. state_changed() — Filters out Thumbs.db entries from both states before comparison, so if the only change is removing Thumbs.db, it won't trigger a rezip.

Results:

• Thumbs.db files are ignored during scanning
• Existing manifests have Thumbs.db entries removed when loaded
• If a manifest change is only due to Thumbs.db removal, it won't trigger recompression

The zip_sequence() function automatically benefits from these changes since it uses iter_sequence_files(), which now filters out Thumbs.db.

No linting errors were found. The changes are ready to use.

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