binary-credential-format-boundary SKILL.md skillA
This file is byte-identical to the first copy the registry indexed. Same content hash, so the same checks give both the same grade.
binary-credential-format-boundary from jinning6/noosphere is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add jinning6/noosphere/binary-credential-format-boundary@git:20260715.10fc9a0Pins git:20260715.10fc9a0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- jinning6/noosphere
- Path
shared_skills/active/binary-credential-format-boundary/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260715.10fc9a0, committed Jul 15, 2026
- Size
- 4,018 bytes
- Repository stars
- 18
- License
- Apache-2.0
Audit and repair readers for fixed-length binary credentials and their text encodings without mutating raw bytes. Use when code loads Ed25519/X25519 keys, nonces, digests, MAC keys, signatures, tokens, or other opaque bytes from files or environment values; when `.strip()`, decoding, newline handling, or format auto-detection occurs before length/type validation; or when cryptographic tests fail intermittently for otherwise valid generated material.
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
# Binary Credential Format Boundary
Preserve opaque binary values byte-for-byte while supporting explicitly defined text encodings through a separate parsing branch. Treat a flaky cryptographic verification as a possible ingestion bug before changing the cryptographic primitive.
## Diagnose
1. Reproduce the failure and capture only exception types, lengths, and hashes; never print credential bytes.
2. Verify the primitive independently with an in-memory generate/sign/verify or encrypt/decrypt control.
3. Trace the exact bytes from serialization through file/environment ingestion to the primitive.
4. Look for pre-validation mutations: `.strip()`, `.splitlines()`, Unicode decode/encode, newline normalization, NUL termination, case conversion, or permissive Base64 decoding.
5. Compare interpreter and library versions only after the byte path is proven unchanged.
## Parse Without Ambiguity
For a contract that accepts either a fixed-length raw value or Base64 text:
```python
raw = path.read_bytes()
if len(raw) == EXPECTED_RAW_LENGTH:
value = raw
else:
value = base64.b64decode(raw.strip(), validate=True)
if len(value) != EXPECTED_RAW_LENGTH:
…Read the whole file at its exact version.
How to install
mdr add jinning6/noosphere/binary-credential-format-boundary@sha256:dcfdd2a1ae6e78a9The line at the top of this page pins the label git:20260715.10fc9a0, 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_algpc3qg7dr4stfg)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Jul 15, 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 (4018 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
jinning6/noosphere · 18 stars · license Apache-2.0 · pushed 2026-11-09 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_algpc3qg7dr4stfg GET https://markdownregistry.com/api/v1/resolve?ref=jinning6/noosphere/binary-credential-format-boundary GET https://markdownregistry.com/api/v1/blob/dcfdd2a1ae6e78a99d26a5b1f6c2a3f6fb613985fe169ff6d721cbd3a4697191
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.
More from jinning6/noosphere
Every file in jinning6/noosphere