evidence-vault-chain-of-custody SKILL.md skillA
evidence-vault-chain-of-custody from miosa-osa/osa is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add miosa-osa/osa/evidence-vault-chain-of-custody@git:20260913.e13b6b8Pins git:20260913.e13b6b8 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- miosa-osa/osa
- Path
priv/skills/evidence-vault-chain-of-custody/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260913.e13b6b8, committed Sep 13, 2026
- Size
- 5,360 bytes
- Repository stars
- 78
- License
- Apache-2.0
Evidence management for security engagements: chain-of-custody records with SHA-256 integrity, the provenance-strict verification gate (a finding is only 'verified' when backed by real tool output, never prose), credential redaction for any outward-facing surface, CVSS-to-severity scoring, and authorized retest workflows with typed probe dispositions. Use when structuring findings/evidence storage for a pentest or bug-bounty engagement, deciding what evidence makes a claim reportable…
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
# Evidence Vault & Chain of Custody Derived from T3MP3ST's `src/evidence/` (Apache-2.0). The core principle: **a claim is only as strong as its provenance. Prose is not evidence.** ## 1. The provenance-strict verification gate A finding may be marked `verified` ONLY when backed by real tool output. The gate is honest by construction — it never invents provenance, and it states why it blocked: - **Tool evidence types** that count: `output`, `command`, `response`, `request`, `log`, `file` — each with non-empty content. A human note or a narrative paragraph is `context`, not proof. - **Zero tool evidence → FAIL** with reason: "no tool-output evidence — provenance-strict requires a finding be backed by real tool output, not prose". - **Severity must be earned:** asserting `critical` or `high` with zero evidence of any kind is an overclaim and fails the gate. - **Typed provenance:** `none` (no evidence at all), `context` (notes only), `tool` (real output). Only `tool` passes. Apply the same gate to your own work: before you report a finding to the operator, list the exact tool receipt (command output, HTTP pair, log line) that …
Read the whole file at its exact version.
How to install
mdr add miosa-osa/osa/evidence-vault-chain-of-custody@sha256:860249d7f85a8f1eThe line at the top of this page pins the label git:20260913.e13b6b8, 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_2cod7flju2d7efo7)
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Versions
The registry has recorded 1 version of this file, committed on Sep 13, 2026.
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 (5360 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
miosa-osa/osa · 78 stars · license Apache-2.0 · pushed 2026-10-29 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_2cod7flju2d7efo7 GET https://markdownregistry.com/api/v1/resolve?ref=miosa-osa/osa/evidence-vault-chain-of-custody GET https://markdownregistry.com/api/v1/blob/860249d7f85a8f1e638f2d2d35b0abed14641cef7b91a6cfbf9bbfa72df1f0df
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.