ctx-core SKILL.md skillA
ctx-core from broomva/skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add broomva/skills/ctx-core@v0.3.1Pins v0.3.1 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- broomva/skills
- Path
skills/orchestration/ctx-core/SKILL.md- Versions recorded
- 5
- Latest version
- v0.3.1, committed Oct 15, 2026
- First version recorded
- Sep 29, 2026
- Size
- 28,105 bytes
- Repository stars
- 5
- License
- MIT
The shared context core, phase 1: a read-only shared board for every Claude Code session in a workspace scope. Hooks publish each session's start, the keyword of its ARC-STATUS line at every Stop, and its death on StopFailure to one append-only log per scope, as structured fields only. A SessionStart hook injects a short factual brief of the board rows for the session's branch and cwd, including other live sessions on the same branch. Sessions in different worktrees therefore see each other…
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
# ctx-core: the shared board (phase 1)
In the 09-26 → 09-29 run, coordination state lived in the coordinator's
context window. Compaction kept dropping it, and no worker session could see
another. Phase 1 of the shared context core
([design](https://github.com/broomva/workspace/pull/825),
`docs/specs/2026-09-29-shared-context-core.html`) puts the minimum of that
state on disk: which sessions exist in a scope, where they are (cwd, branch),
the keyword of their last ARC-STATUS line, and whether they died. Every
session gets the relevant slice of it at start.
It is read and publish only. There is no mailbox, no wake-up, and no
retention.
## What it stores: structured fields, no free text
| Field | From | Kept as |
|---|---|---|
| `session_id`, `paseo_agent_id` | hook input, `PASEO_AGENT_ID` | id-shaped strings (`[A-Za-z0-9][A-Za-z0-9._:-]{0,127}`), otherwise omitted |
| `cwd`, `repo`, `branch` | the filesystem and git | flattened to one line |
| `type`, `ts` | the hook | `session.start`, `session.stop` or `session.died`; UTC milliseconds |
…Read the whole file at its exact version.
How to install
mdr add broomva/skills/ctx-core@sha256:133ea170b3ac613dThe line at the top of this page pins the label v0.3.1, 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_rlw3ibebiblzy2oj)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Sep 29, 2026 and Oct 15, 2026, about one every 4 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v0.3.1 latest | 2026-10-15 | 9011d8d | 28,105 B | A | view · diff |
| v0.3.1 | 2026-10-01 | 66ec7f3 | 28,098 B | A | view · diff |
| v0.3.0 | 2026-10-01 | 247a190 | 27,509 B | A | view · diff |
| v0.2.0 | 2026-10-01 | d56061d | 21,648 B | A | view · diff |
| v0.1.0 | 2026-09-29 | e831f67 | 19,352 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 (28105 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
broomva/skills · 5 stars · license MIT · pushed 2026-11-07 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_rlw3ibebiblzy2oj GET https://markdownregistry.com/api/v1/resolve?ref=broomva/skills/ctx-core GET https://markdownregistry.com/api/v1/blob/133ea170b3ac613dac1e015b1a735e4dd517ca6fdc6e8a97156ced8439c43ac2
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.