synthesis-okf

name	synthesis-okf
description	Validate, convert, and author content for Google's Open Knowledge Format (OKF v0.1) — the markdown-plus-YAML-frontmatter knowledge-bundle spec announced 2026-06-12. Includes a conformance validator (the checker Google's own OKF repo ships none of), a converter that backfills OKF frontmatter onto an existing markdown corpus idempotently, and the proven repo-by-repo conversion procedure. Use when adopting OKF for an "LLM wiki" style knowledge base, auditing conformance, or converting a corpus of markdown notes/docs into a conformant, agent-readable bundle.
license	CC0-1.0
depends_on	[]
metadata	{"author":"Rajiv Pant"}

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 validator, a converter, and the 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:

1. Every non-reserved .md file has a parseable YAML frontmatter block.
2. Every frontmatter block has a non-empty type field.
3. 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.

Tools

scripts/okf_validate.py — conformance checker

python3 scripts/okf_validate.py <bundle_dir> [--summary] [--check-links] [--quiet]

Checks the three hard rules against every .md file in the bundle. --summary prints a concept/type breakdown; --check-links additionally reports broken relative links (as info, never as a conformance failure — broken links are explicitly valid per §5.3). Exit codes: 0 conformant, 1 errors found, 2 usage error.

scripts/okf_convert.py — idempotent frontmatter backfill

python3 scripts/okf_convert.py <bundle_dir> \
  --type-map instructions=Instruction,runbooks=Runbook,datasets=Dataset,contexts=Context \
  --descriptions <repo>-descriptions.yaml \
  [--dry-run]

Backfills OKF frontmatter onto an existing markdown corpus without disturbing what's already there:

• Assigns type by top-level subdirectory per --type-map (free-form per spec §4.1 — name types after what they actually are; richer repos can add finer types like Biography Timeline Entry or a repo-specific Client type for a clients/ directory).
• Existing frontmatter fields are never overwritten, only backfilled where missing — safe to run against a corpus where some files already carry hand-authored metadata.
• Derives title from each file's H1 if absent, timestamp from the file's last git-commit time if absent.
• Renames in-bundle README.md files to the reserved index.md (no frontmatter needed) and regenerates them in OKF §6 style: lead paragraph (preserved verbatim from the original README) + a concept list grouped by type + a subdirectories list. Walks every ancestor directory up to the bundle root, not just each concept file's direct parent, so a directory holding only subdirectories (no concept file directly inside it) still gets its own index.md and its parent's link to it isn't left broken.
• Sets okf_version: "0.1" on the bundle-root index.md only, per spec.
• --dry-run prints what would change without writing anything. Always run this first.

--descriptions <file>.yaml supplies curated {description, tags} per concept relpath — the one genuinely editorial step. Auto-extracting a good one-sentence description from a file's body is unreliable (skill-stub runbooks in particular tend to be a title plus an npx code fence with no real prose to extract from); curate this file by hand per bundle.

The conversion procedure

Full step-by-step, proven across multiple real conversions (a public 26-doc repo, a 72-doc personal knowledge base, and several other repos of varying size): see references/conversion-procedure.md. Summary:

1. Baseline — run the validator, expect non-conformant.
2. Author descriptions — the editorial 20%. Write <bundle>-descriptions.yaml.
3. Convert — dry-run first, review, then apply for real.
4. Validate to clean — 0 errors, 0 warnings, --check-links too.
5. Compiler config — if the bundle feeds a compilation pipeline, add **/index.md and **/log.md to its exclude list (navigation scaffolding, not knowledge to compile).
6. Review the diff — confirm no README's unique guidance was lost in its index.md regeneration; spot-check descriptions.
7. Commit.

Known lessons from real conversions

• The converter needs to walk every ancestor directory, not just each file's direct parent, when deciding what needs an index.md. A purely-organizational directory (holding only subdirectories, no concept file of its own) is easy to miss and leaves a dangling link from its parent's generated index. Fixed in this skill's copy of okf_convert.py — if you're comparing against an older copy, this is the diff to look for.
• Space-containing filenames break generated links. CommonMark markdown link destinations can't contain unescaped spaces; a runbook named Podcast Transcript Enhancement.md needs a kebab-case rename (git mv, preserves history) before the converter's generated index links to it correctly.
• Workspace-private / minimal-stub repos may have no sources:/compilation: block at all in their compile config — if there's nothing for a compiler to walk, step 5 (the index.md/log.md exclude) has nothing to add to; that's a legitimate no-op, not a gap.
• A bundle with zero markdown files is vacuously conformant. Don't treat an empty source/ tree as something needing conversion — there's nothing non-conformant about it.
• type values are genuinely free-form (spec §4.1, no central registry). Don't force a one-size-fits-all vocabulary across very different repos; a richer repo earns its own finer-grained types where the coarse Instruction/Runbook/Dataset split loses real distinctions worth keeping (e.g. a repo with substantial per-client content benefits from its own Client type rather than folding everything into Dataset).

Related skills

• synthesis-context-lifecycle — the tiered CONTEXT.md/REFERENCE.md/sessions/ project-memory pattern this skill's own conversion procedure was tracked with; OKF is about the content corpus, not the project-management layer (which stays explicitly out of OKF's own bundle scope).
• synthesis-anti-shortcuts — dispatch/acceptance hygiene for running this conversion at scale (one sub-agent per repo).