Decodie — Flag Stale Mode

Fast, CI-friendly counterpart to verify mode. For every entry with a verified_sha, check whether any of its source files have changed since that SHA, and flip stale: true on entries that have. Does not read source files or recompute anchor hashes — only diffs filenames against git history.

This mode modifies .decodie/index.json only.

Activation

Takes no arguments. Always operates on the full index.

Setup

1. Confirm .decodie/ exists. If not: "No .decodie/ directory found — nothing to check." Stop.
2. Confirm git repository:

   git rev-parse --git-dir
   

   If not: "Not a git repository — flag-stale requires git history. Run verify mode instead." Stop.
3. Read .decodie/index.json. If empty: "No entries to check." Stop.