signal-detector skillA
signal-detector is agent-read markdown (skill) from garrytan/gbrain: Opt-in ambient signal capture. After explicit enablement, applies on substantive inbound messages to detect original thinking and entity mentions. Use an authorized sub-agent where supported; otherwise detect inline. Aim to never block the main response..
Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.
What the file says
# Signal Detector — Ambient Brain Capture After the user enables automatic capture, apply this lightweight pass to substantive inbound messages within their chosen scope. It watches for: 1. **Original thinking** — the user's ideas, observations, theses, frameworks 2. **Entity mentions** — people, companies, media references Original thinking is AT LEAST as valuable as entity extraction. Ideas are the intellectual capital. Entities are bookkeeping. Both compound over time. ## Contract This skill guarantees: - Applies only after explicit automatic-capture opt-in (skips: no recorded choice, capture off, chat-only requests, and purely operational messages) - Spawns as a sub-agent where the harness supports it; otherwise runs the detection inline before composing the reply. Never blocking the response is the intent, not a runtime contract - Checks the user's stored capture choice before writing and honors narrower per-message instructions; a first-fire announcement is not consent - Captures ideas with the user's EXACT phrasing (no paraphrasing) - Detects entity mentions and creates/enriches brain pages - Logs a one-line summary of what was captured …
Read the whole file at its exact version.
How to install
mdr add garrytan/gbrain/signal-detector@v1.1.0mdr add garrytan/gbrain/signal-detector@sha256:ea090be2fedeb528Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.
[](https://markdownregistry.com/a/art_p7bpr6idvih7sm5m)
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Versions
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v1.1.0 latest | 2026-09-10 | 1fc8b6c | 7,426 B | A | view · diff |
| v1.0.0 | 2026-09-02 | d337920 | 6,772 B | A | view · diff |
| v1.0.0 | 2026-08-17 | 489e277 | 6,300 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 (7426 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
garrytan/gbrain · 30,275 stars · license MIT · pushed 2026-09-23 · branch master
API
GET https://markdownregistry.com/api/v1/artifacts/art_p7bpr6idvih7sm5m GET https://markdownregistry.com/api/v1/resolve?ref=garrytan/gbrain/signal-detector GET https://markdownregistry.com/api/v1/blob/ea090be2fedeb528c3b3a4b3c649abd3ff07b3ecdc6266bf2930364537683489
Your agent 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.