context-compaction-keep-or-drop SKILL.md skillA
context-compaction-keep-or-drop from mrmps/classifier-dev is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add mrmps/classifier-dev/context-compaction-keep-or-drop@git:20260919.3040be8Pins git:20260919.3040be8 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- mrmps/classifier-dev
- Path
skills/_rejected/context-compaction-keep-or-drop/SKILL.md- Versions recorded
- 2
- Latest version
- git:20260919.3040be8, committed Sep 19, 2026
- First version recorded
- Sep 19, 2026
- Size
- 6,041 bytes
- Repository stars
- 436
- License
- MIT
Label each context chunk keep, drop or replace-with-a-pointer and pass the survivors through byte for byte instead of summarising, with key-shaped chunks decided locally and never sent, and a checksum row per chunk. Use when a session runs out of room, or on "compact" or "trim the history".
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
# Compact by deciding, not by summarising
A summary rewrites the one line you needed into a sentence about it. Label
each chunk instead and pass the keepers through unchanged: verbatim in,
verbatim out.
## What leaves the machine
Never the transcript. Per chunk, a header line and at most its first 2,000
characters, redacted, and only if it passes a local rule:
- **Decided here, never sent.** A chunk holding bearer text, a key, token,
secret or password word, an armoured block or NAME=value lines is labelled
by rule: kept if it is part of the live step, dropped if not, as `local`.
- **Redacted, then sent.** The rest has bearer headers, fields named for a
key, token, secret or password, runs of 40 characters or more and mail
addresses replaced by a placeholder. Past two placeholders it falls back to
the rule above.
in curl -H 'authorization: Bearer tok_9f2a7c31d4' https://api.example.com/charges
out curl -H 'authorization: Bearer [redacted]' https://api.example.com/charges
The service states that it stores no input text, and forwards it to the model
provider that answers: https://classifier.dev/privacy. Read that against your
…Read the whole file at its exact version.
How to install
mdr add mrmps/classifier-dev/context-compaction-keep-or-drop@sha256:5e2a9da91f670d37The line at the top of this page pins the label git:20260919.3040be8, 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_dscxjxjldadbyzeg)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, all committed on Sep 19, 2026.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260919.3040be8 latest | 2026-09-19 | 3040be8 | 6,041 B | A | view · diff |
| git:20260919.33ae531 | 2026-09-19 | 33ae531 | 5,997 B | A | view |
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 (6041 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
mrmps/classifier-dev · 436 stars · license MIT · pushed 2026-11-06 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_dscxjxjldadbyzeg GET https://markdownregistry.com/api/v1/resolve?ref=mrmps/classifier-dev/context-compaction-keep-or-drop GET https://markdownregistry.com/api/v1/blob/5e2a9da91f670d3700db26b6b5eb5f2296a777e813170d61341f187398aa2019
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.