secrets-in-file-metadata SKILL.md skillA
secrets-in-file-metadata from tonydzi/second-brain-starter-kit is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add tonydzi/second-brain-starter-kit/secrets-in-file-metadata@git:20261020.402f6b7Pins git:20261020.402f6b7 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- tonydzi/second-brain-starter-kit
- Path
skills/secrets-in-file-metadata/SKILL.md- Versions recorded
- 4
- Latest version
- git:20261020.402f6b7, committed Oct 20, 2026
- First version recorded
- Sep 24, 2026
- Size
- 15,755 bytes
- Repository stars
- 14
- License
- MIT
- Extract and interpret embedded file metadata with exiftool — EXIF GPS coordinates, camera make, model and serial, DateTimeOriginal and CreateDate timestamps, XMP and IPTC fields, and Office and PDF… Use when reading EXIF from a photo, checking who really wrote a document, dating a file, fingerprinting a camera or phone, or investigating provenance in JPEG, HEIC, RAW, MP4, DOCX, XLSX or PDF.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Secrets in file metadata The fastest lead in an investigation is often already inside the file: GPS to six decimal places, a camera serial that ties four "unrelated" images to one body, a document author who is a real employee, a template path containing a corporate share name. Two things beginners get wrong. Absent metadata is not suspicious — it is the normal state of anything that passed through a social platform. And present metadata is not proof: every tag is a **claim written by whatever software touched the file last**, and all of it is editable with one command. ## Where to look first, given what you have | You have | Reach for | Because | |---|---|---| | A photo downloaded from a social platform | Expect nothing | Delivery pipelines re-encode. Use `find-the-original-image` to reach an un-stripped upstream copy. | | A photo from a forum, CMS, or direct file link | Full exiftool dump | These serve your bytes back. GPS survives here more often than people expect. | | A messaging attachment | Full dump, and note how it was sent | Sent-as-photo is usually re-encoded; sent-as-file usually is not. | …
Read the whole file at its exact version.
How to install
mdr add tonydzi/second-brain-starter-kit/secrets-in-file-metadata@sha256:b9a02fa36a667e84The line at the top of this page pins the label git:20261020.402f6b7, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_i3bgpbkirpmofnba)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 4 versions of this file, between Sep 24, 2026 and Oct 20, 2026, about one every 9 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261020.402f6b7 latest | 2026-10-20 | 402f6b7 | 15,755 B | A | view · diff |
| git:20261007.cd6c208 | 2026-10-07 | cd6c208 | 15,761 B | A | view · diff |
| git:20261003.a2d662f | 2026-10-03 | a2d662f | 15,762 B | A | view · diff |
| git:20260924.2784cb2 | 2026-09-24 | 2784cb2 | 14,647 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (15755 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
tonydzi/second-brain-starter-kit · 14 stars · license MIT · pushed 2026-11-06 · branch master
API
GET https://markdownregistry.com/api/v1/artifacts/art_i3bgpbkirpmofnba GET https://markdownregistry.com/api/v1/resolve?ref=tonydzi/second-brain-starter-kit/secrets-in-file-metadata GET https://markdownregistry.com/api/v1/blob/b9a02fa36a667e8482f85996642e6498585df66beb76eb2c0953c7835be34762
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.