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 synthesisengineering/synthesis-skills --skill synthesis-okfgit clone --depth 1 https://github.com/synthesisengineering/synthesis-skillsWrote 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/synthesisengineering/synthesis-skills/synthesis-okf)<a href="https://agentmods.dev/skills/synthesisengineering/synthesis-skills/synthesis-okf"><img src="https://agentmods.dev/badge/skills/synthesisengineering/synthesis-skills/synthesis-okf/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/synthesisengineering/synthesis-skills/synthesis-okf"><img src="https://agentmods.dev/badge/skills/synthesisengineering/synthesis-skills/synthesis-okf.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00147 | $0.02424 |
| Opus 5 | $0.00073 | $0.01212 |
| Sonnet 5 | $0.00029 | $0.00485 |
| Haiku 4.5 | $0.00015 | $0.00242 |
Grade A, and why
synthesis-okf 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 10d 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 — 179 lines — stays where its author put it; the contents beside it link to each section on GitHub.
synthesis-okf
Google's Open Knowledge Format (OKF v0.1, announced 2026-06-12) formalizes a pattern many
"LLM wiki" knowledge bases already use: a directory tree of markdown files with YAML
frontmatter, readable by any agent that can cat a file, shippable by anyone who can
git clone a repo. Per the spec's own §10, this is exactly the pattern OKF names as one
of its target use cases — the differentiator is only that it's now specified.
Google's reference repo (github.com/GoogleCloudPlatform/knowledge-catalog/tree/main/okf)
ships an enrichment agent and an HTML visualizer, but no conformance validator or converter.
This skill fills that gap: a conformance validator, a converter, a house-consistency
checker, and a procedure proven across several real-world repo conversions.
The spec, in brief
A bundle is a directory (conventionally a repo's source/ directory, or the whole
repo for a dedicated knowledge repo). A concept is one markdown file: one unit of
knowledge. Conformance (§9) has exactly three hard rules:
- Every non-reserved
.mdfile has a parseable YAML frontmatter block. - Every frontmatter block has a non-empty
typefield. - Reserved filenames (
index.md,log.md) follow their defined structure when present.
Everything else — missing optional fields (title, description, tags, timestamp,
resource), unknown type values, broken cross-links, missing index.md — is soft
guidance. A validator or consumer must not reject a bundle for any of it. Full spec:
references/okf-spec-v0.1.md (verbatim, 451 lines).
index.md and log.md are the only two reserved filenames. index.md is a directory
listing for progressive disclosure and carries no frontmatter, except the bundle-root
index.md, which may declare okf_version: "0.1". log.md is a chronological change
history (## YYYY-MM-DD headings, newest first). Both are excluded from a bundle's own
"knowledge" content — they're navigation scaffolding, not concepts.
What ships with it
7 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.
- 10d ago First seen · 179 lines · 147 tokens per session scan A f43bd58f1d7f
synthesis-okf is a skill published in the GitHub repository synthesisengineering/synthesis-skills (18 stars, last pushed today), licensed Apache-2.0. It adds 147 tokens to every session and 2,424 once invoked, about $0.0007 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 2026-08-30.
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