Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add rhtevan/agentfs --skill goose-kgmgit clone --depth 1 https://github.com/rhtevan/agentfsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/rhtevan/agentfs/goose-kgm)<a href="https://agentmods.dev/skills/rhtevan/agentfs/goose-kgm"><img src="https://agentmods.dev/badge/skills/rhtevan/agentfs/goose-kgm/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/rhtevan/agentfs/goose-kgm"><img src="https://agentmods.dev/badge/skills/rhtevan/agentfs/goose-kgm.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00028 | $0.00911 |
| Opus 5 | $0.00014 | $0.00456 |
| Sonnet 5 | $0.00006 | $0.00182 |
| Haiku 4.5 | $0.00003 | $0.00091 |
Grade A, and why
goose-kgm scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 4d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 122 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Goose KG Memory — Knowledge Index
Manage the Knowledge Graph Memory (KGM) MCP extension for Goose. KGM provides a deterministic substring-search index over OKF knowledge bundles — it is an optional accelerator, not a replacement for OKF progressive discovery.
Design Constraints
- OKF-primary. The OKF index chain (
~/.agents/knowledge/index.md→ bundleindex.md→ concept docs) is the required discovery path. KGM collapses multi-hop lookups into a singlesearch_nodescall when enabled, but OKF must work without KGM. - Disabled by default. User must explicitly enable.
- Knowledge concepts only. KGM indexes bundle/concept metadata from OKF — not guardrails, not memories, not skill content.
- Derived artifact. The JSONL file is regenerated from OKF indexes. It is gitignored and never hand-edited.
Configuration
| Setting | Value |
|---|---|
| Extension name | knowledge-graph-memory |
| Type | stdio (MCP server) |
| Command | npx |
| Args | ["-y", "@modelcontextprotocol/server-memory"] |
| Env var | MEMORY_FILE_PATH |
| JSONL path | ~/.agents/knowledge/.kgm-index.jsonl |
| Config file | ~/.config/goose/config.yaml |
Operations
Setup
Signal: "setup goose kgm"
bash ~/.agents/skills/goose-kgm/scripts/setup-kgm.sh
Adds the knowledge-graph-memory extension entry to Goose config
with enabled: false. Creates the JSONL directory if needed.
Idempotent — skips if entry already exists.
Teardown
Signal: "teardown goose kgm"
bash ~/.agents/skills/goose-kgm/scripts/teardown-kgm.sh
Removes the knowledge-graph-memory extension entry from Goose
config and deletes the JSONL file. Idempotent.
Enable
Signal: "enable kgm"
bash ~/.agents/skills/goose-kgm/scripts/enable-kgm.sh
Sets enabled: true in the extension config. Requires setup first.
After enabling, the agent should restart or the extension becomes
available in the next Goose session.
Disable
What ships with it
8 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 4d ago First seen · 122 lines · 28 tokens per session scan A cdd25aff988a
goose-kgm is a skill published in the GitHub repository rhtevan/agentfs (2 stars, last pushed 4d ago), licensed Apache-2.0. It adds 28 tokens to every session and 911 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-04.
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