Decodie — Verify Mode

Confirm that every learning entry in .decodie/index.json still matches the source code it references, mark mismatches as stale, and stamp confirmed entries with the current commit SHA.

This mode modifies .decodie/index.json only. It never modifies session files, source code, or anything outside .decodie/.

Activation

Parse the optional path argument:

• If no path provided, verify all entries.
• If a path is provided, verify only entries whose sources (or references[].file) overlap that path. For a directory, an entry is in scope if any source file starts with that directory.
• If the path does not exist, report the error and stop.

Setup

1. Confirm .decodie/ exists. If not: "No .decodie/ directory found — nothing to verify." Stop.
2. Read .decodie/index.json. If empty: "No entries to verify." Stop.
3. Determine current commit SHA:

``bash git rev-parse HEAD ` If not a git repo, warn and continue (anchor checks still run, but verified_sha` cannot be set).

Verification Process

For each entry in scope:

1. Resolve source files. Prefer sources; fall back to unique references[].file values. If falling back, backfill the sources field.

1. Check each reference { file, anchor, anchor_hash }:

- File missing → reference fails. - File exists → search for literal anchor string. If found, recompute SHA-256 hash and confirm first 8 hex chars match anchor_hash.

1. Decide outcome:

- All references resolve → stale: false, verifiedsha = HEAD SHA. - Any reference fails → stale: true, leave verifiedsha unchanged.

1. Write back to index.json. Preserve all other fields and sort order.

Reporting

Decodie verify
  Verified:  N entries (verified_sha -> <short-sha>)
  Stale:     M entries
  Skipped:   K entries (out of scope)
  Backfilled sources on: B entries

If stale entries exist, list them:

Stale entries:
  - entry-1711540000-a1b2 -- references/0: src/lib/foo.ts (anchor not found)
  - entry-1711540123-c3d4 -- references/1: src/lib/bar.ts (file missing)

Important Notes

• Append-only for entry content. Only sources, verified_sha, and stale may be updated.
• Idempotent. Running twice with no changes is a no-op.
• Path is a filter. Out-of-scope entries are skipped, not cleared.
• No git history rewriting. Only reads HEAD via git rev-parse.