concept-synthesis skillA
concept-synthesis is agent-read markdown (skill) from garrytan/gbrain: Deduplicate and synthesize raw concept stubs into a tiered intellectual map (T1 Canon to T4 Riff), tracing idea evolution across sources over time. Transforms thousands of raw concept pages into a curated intellectual fingerprint. Includes a reversible curation cull pass (Phase 5) with hard keep/delete/merge verdicts, substance gates, grounding labels, cluster budgets, and merge-with-backlinks salience promotion..
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
# concept-synthesis — From Raw Stubs to Intellectual Map
> **Convention:** see [conventions/quality.md](../conventions/quality.md) for
> back-link enforcement and quote-fidelity requirements.
>
> **Convention:** see [_brain-filing-rules.md](../_brain-filing-rules.md) —
> output files under `concepts/` per the primary-subject rule.
## What this solves
Many ingestion pipelines (signal-detector, idea-ingest, voice-note-ingest)
create a concept page for every idea mentioned. Over months this produces:
- Thousands of stub pages, many duplicates or near-duplicates
- Timeline entries that repeat the same source across multiple concept pages
- No synthesis — just "the user mentioned X on this date"
- No tier assignments — everything flat
- No clustering — related ideas aren't linked
This skill transforms that raw material into a curated intellectual map.
## Architecture
```
Phase 1: Dedup + merge (deterministic)
N stubs → ~N/4 canonical concepts
├── Jaccard dedup (word-overlap on titles + first-paragraph)
├── Substring dedup ("founder mode" vs "founder mode vs manager mode")
├── Semantic dedup (LLM: "are these the same idea?")
…Read the whole file at its exact version.
How to install
mdr add garrytan/gbrain/concept-synthesis@v0.2.0mdr add garrytan/gbrain/concept-synthesis@sha256:ed02d2e385143b16Pin 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_gcaafkskt6tzqfi2)
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Versions
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 (21630 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_gcaafkskt6tzqfi2 GET https://markdownregistry.com/api/v1/resolve?ref=garrytan/gbrain/concept-synthesis GET https://markdownregistry.com/api/v1/blob/ed02d2e385143b16a1e69ee5934288fb4d0b755f68c4312faff663e6b2d7c4ed
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.