memory-hygiene SKILL.md skillA
memory-hygiene from huytieu/cog-second-brain is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add huytieu/cog-second-brain/memory-hygiene@git:20260807.b852369Pins git:20260807.b852369 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- huytieu/cog-second-brain
- Path
skills/memory-hygiene/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260807.b852369, committed Aug 7, 2026
- Size
- 4,874 bytes
- Repository stars
- 1,350
- License
- MIT
Periodic trust sweep of persistent memory and durable knowledge notes - re-verifies environment-dependent claims against the live environment, stamps last_verified + confidence, and proposes archiving drifted entries.
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
# COG Memory Hygiene Skill
## Purpose
Prevent the **stale-but-confident** failure mode: a memory or knowledge note that was correct when written ("the webhook lives at X", "the board ID is Y") silently drifts after the environment changes, yet still ranks high at recall and gets acted on.
The system move (adapted from "From Model Scaling to System Scaling: Scaling the Harness in Agentic AI", Gu, UC Berkeley, arXiv:2605.26112): **make trust a runtime decision, not a property of the stored item**. Re-verify against the live environment, and keep per-entry `last_verified` and `confidence` as first-class fields so future recalls can weigh trust.
## When to Invoke
- `/memory-hygiene`
- "Audit my memories" / "check for stale memories"
- After a memory misfires (a recalled fact turned out wrong)
- Default cadence: monthly
## Scope
Sweep two stores:
1. **Agent memory** — wherever your agent keeps persistent memory files (e.g. Claude Code's auto-memory directory). Sweep every entry except the index itself.
2. **Durable knowledge notes** — `05-knowledge/**` files whose claims reference the environment (paths, URLs, IDs, tool names).
…Read the whole file at its exact version.
How to install
mdr add huytieu/cog-second-brain/memory-hygiene@sha256:093c4f588f3a8289The line at the top of this page pins the label git:20260807.b852369, 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_6g5t2jceyw2ldx5c)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Aug 7, 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 (4874 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
huytieu/cog-second-brain · 1,350 stars · license MIT · pushed 2026-10-23 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_6g5t2jceyw2ldx5c GET https://markdownregistry.com/api/v1/resolve?ref=huytieu/cog-second-brain/memory-hygiene GET https://markdownregistry.com/api/v1/blob/093c4f588f3a8289758f41180534c50d0f11632e0e9fbb19edf0a89812968eae
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.
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