session-brain SKILL.md skillA
session-brain from ar9av/obsidian-wiki is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add ar9av/obsidian-wiki/session-brain@git:20261105.7ae5ed7Pins git:20261105.7ae5ed7 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- ar9av/obsidian-wiki
- Path
skills/session-brain/SKILL.md- Versions recorded
- 1
- Latest version
- git:20261105.7ae5ed7, committed Nov 5, 2026
- Size
- 3,977 bytes
- Repository stars
- 3,689
- License
- MIT
Build or refresh a browser-viewable topic graph over Claude session history using local clustering. Use for mapping or clustering sessions, recent or stale topic analysis, or rebuilding/showing the session graph. Unlike wiki-history-ingest, it indexes raw sessions and never writes to the vault.
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
# Session Brain Builds a searchable topic graph over your agent session history. The output is a **sidecar** at `~/.claude/session-brain/` — the vault is never touched. All the heavy lifting is deterministic Python in the `obsidian-wiki` CLI. Your only job is to name the clusters, which takes exactly one turn and requires reading no transcripts. ## When to use which skill | Goal | Skill | |---|---| | Build or refresh the graph; survey topics | `session-brain` (this one) | | Find and load a specific past session | `session-search` | | Distil sessions into permanent vault pages | `wiki-history-ingest` / `claude-history-ingest` | ## Step 1: Build ```bash obsidian-wiki sessions-build --json ``` Roughly 3 seconds cold on ~1000 sessions, well under a second incrementally — it re-reads only transcripts whose size or mtime changed. Useful flags: | Flag | When | |---|---| | `--full` | Ignore all caches and re-read everything | | `--mutual` | Tighter, smaller clusters (mutual-kNN edges only) | | `--half-life N` | Change the recency half-life (default 90 days) | | `--min-sim 0.15` | Fewer, stronger edges — use if the graph is too dense to read | …
Read the whole file at its exact version.
How to install
mdr add ar9av/obsidian-wiki/session-brain@sha256:f1239b7635fe8097The line at the top of this page pins the label git:20261105.7ae5ed7, 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_ewllfdsm6vd7o7jt)
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Versions
The registry has recorded 1 version of this file, committed on Nov 5, 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 (3977 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
ar9av/obsidian-wiki · 3,689 stars · license MIT · pushed 2026-11-05 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_ewllfdsm6vd7o7jt GET https://markdownregistry.com/api/v1/resolve?ref=ar9av/obsidian-wiki/session-brain GET https://markdownregistry.com/api/v1/blob/f1239b7635fe80972f8ced36e572df319e8ba63354533efe5cdd57436763feae
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.