Getting it into your agent
It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.
git clone --depth 1 https://github.com/batteryshark/rekitnpx agentmods add skills/batteryshark/rekit/disk-image-scanWrote 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/batteryshark/rekit/disk-image-scan)<a href="https://agentmods.dev/skills/batteryshark/rekit/disk-image-scan"><img src="https://agentmods.dev/badge/skills/batteryshark/rekit/disk-image-scan/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/batteryshark/rekit/disk-image-scan"><img src="https://agentmods.dev/badge/skills/batteryshark/rekit/disk-image-scan.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00080 | $0.00475 |
| Opus 5.5 | $0.00032 | $0.00190 |
| Sonnet 5.5 | $0.00016 | $0.00095 |
| Haiku 4.5 | $0.00008 | $0.00047 |
Grade A, and why
disk-image-scan 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 1mo 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.
What it actually says
Disk Image Scanner
Inventory an image before recovery. Keep the source image read-only and write a
machine-readable scan.jsonl plus summary.json beneath a new or empty output directory.
Workflow
- Record the source path, size, timestamps, selected range, and SHA-256.
- Parse MBR or GPT metadata when present; do not infer partitions from filenames.
- Stream the selected range and validate filesystem structures rather than trusting a bare magic string.
- Use the emitted offsets to choose the next action:
- pass
scan.jsonltoforensic-archive-carve; - pass a validated filesystem
lba512orinferredStartLbatofilesystem-recover; - use
binwalk-carvefor firmware filesystems and heterogeneous embedded payloads.
- pass
- Preserve
summary.jsonwith the recovery output. A full-image scan recordsimageSha256; a partial scan recordsrangeSha256and must not be represented as a whole-image hash.
Usage
bin/rekit run disk-image-scan evidence.img ./forensics/scan
bin/rekit run disk-image-scan evidence.img ./forensics/tail \
--start 11836177920 --length 28183404544
Use --sector-size for GPT media whose logical sectors are not 512 bytes. Tune
--chunk-mib for throughput. --max-hits bounds report growth; if the limit is reached,
the summary marks the scan truncated. MBR inventory covers the four primary entries;
filesystem scanning can still find candidates inside regions not described there, but
extended-partition EBR chains are not parsed.
The runner opens the image only as rb. It never mounts the image, repairs metadata, or
executes content.
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 1mo ago First seen · 42 lines · 80 tokens per session scan A c24d5ff67102
disk-image-scan is a skill published in the GitHub repository batteryshark/rekit (20 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 80 tokens to every session and 475 once invoked, about $0.0003 per session on Opus 5.5. 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.
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