Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add kdr/overcast --skill overcast-provenancegit clone --depth 1 https://github.com/kdr/overcastWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/kdr/overcast/overcast-provenance)<a href="https://agentmods.dev/skills/kdr/overcast/overcast-provenance"><img src="https://agentmods.dev/badge/skills/kdr/overcast/overcast-provenance.svg" alt="Measured on agentmods" height="20"></a>- NVIDIA SkillSpector pass
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00042 | $0.01110 |
| Opus 5 | $0.00021 | $0.00555 |
| Sonnet 5 | $0.00008 | $0.00222 |
| Haiku 4.5 | $0.00004 | $0.00111 |
Grade A, and why
overcast-provenance scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 8d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 91 lines — stays where its author put it; the contents beside it link to each section on GitHub.
overcast-provenance
Use this skill to answer "is this clip real / where did it come from?": given a
suspect video, find the oldest copy and who posted it first. It is the inverse of
overcast-copycat-sweep — searching backward toward the origin rather than forward
for rips — and reuses its geometry-gating and verdict conventions. This skill answers
WHERE a clip came from (origin / earliest copy); for whether it was ALTERED
(manipulation/authenticity — C2PA, EXIF re-save, ELA overlays, a shadow check) use
the complementary overcast-verify-media. Origin and authenticity are distinct,
non-overlapping questions — the leading verify/exif pass below establishes
provenance signals, not a fakery verdict. Use the broad overcast skill and
overcast/reference/verbs.md for exact flags.
Workflow
- Check embedded provenance FIRST, then fingerprint the suspect clip. C2PA
Content Credentials (
verify) and EXIF capture metadata (exif) are the most direct origin evidence when present — a signed manifest names the creator + edit history. They're often stripped on re-upload, so also fingerprint distinctive frames (which survive the re-encodes, crops, and watermarks that defeat exact hashes AND that strip metadata):
overcast doctor --sources --json
overcast case init --json
overcast verify ./suspect.mp4 --json # C2PA / Content Credentials: signer + edit manifest (needs c2patool)
overcast exif ./suspect.mp4 --json # capture device/time, editing software, GPS (needs exiftool)
overcast watch ./suspect.mp4 --json # content + transcript into memory
overcast index create origin --type image-ransac --local --json
overcast image add ./distinctive-frame.png --index <index-id> --json
- Reverse-image-search the frames and sweep sources with topic keywords — crucially
with NO
--sincefloor, since older results sit closer to the origin:
overcast source add "lens:./distinctive-frame.png" --json
overcast source add "x:video:<topic keywords>" --json
overcast source add "youtube:search:<topic keywords>" --json
overcast source add "web:<topic keywords>" --json
overcast scan --limit 20 --json
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 8d ago First seen · 91 lines · 42 tokens per session scan A 4dc6b40eee0d
overcast-provenance is a skill published in the GitHub repository kdr/overcast (16 stars, last pushed 5d ago), licensed Apache-2.0. It adds 42 tokens to every session and 1,110 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other skills, from other repositories
video-to-skill
Turn a video, tutorial, playlist, or course into an installed, evidence-grounded course Skill that can teach, give practice and feedback, apply demonstrated methods, and answer reference questions. Use when the user provides video sources and wants reusable learning or operational capability.
frame-light-leak-cinema
Film light leaks, grain, 16:9 letterbox, and large serif type for cinematic openings or chapter cards.
osmedeus-expert
Expert guide for the Osmedeus security automation workflow engine. Use when: (1) writing or editing YAML workflows (modules and flows), (2) running osmedeus CLI commands (scan, workflow management, installation, server), (3) configuring steps, runners, triggers, or template variables, (4) debugging workflow execution…
recon-tool-integration
Adding a new tool to the recon pipeline: the enrichment-module contract and its isolated wrapper (the actual fan-out and test call path), graph completeness, and the preset catalog that silently strips unknown settings. Miss the isolated wrapper and the tool never runs in parallel; miss the catalog and AI presets drop…
supply-chain-scan
Working on RedAmon's supply-chain scanner (offline OSV + GuardDog + retire + trufflehog): the offline OSV database that the scan path does not bootstrap, the world-readable requirement for the hardened scanner, and the soft-error markers that record what was never analysed. Trigger: editing…
frame-glitch-title
A design template for a glitch-style title frame in Chinese, intended for a video transition, hero image, or cyberpunk graphic. It describes dark backgrounds, distorted lettering, colored offsets, scan lines, noise, and timecode details.