momentum-contributing-to-knowledge-base - SKILL.md Agent Skill

name: momentum-contributing-to-knowledge-base description: 'Add a new topic to, or update an existing topic in, the Momentum Design knowledge base. Use whenever a user asks to capture, document, save, or revise knowledge-base content at any tier (design system, package, or component). Enforces tier selection, deduplication, frontmatter, and index regeneration.'

Contributing to the Knowledge Base

This skill is the step-by-step workflow for adding new or updating existing topic files in the Momentum Design knowledge base.

It does not restate structural rules, tiers, frontmatter fields, allowed topic names, or body heading conventions. Those are defined once in the Knowledge Base Schema and the config files it references (frontmatter.config.json, body.config.json, topic-constraints.config.json). Always consult the schema and its sibling config files before and during the steps below.

When to use this skill

A user asks to capture, document, save, or persist a piece of knowledge (a Q&A, a pattern, an architectural note, a component guideline).
A user asks to edit, revise, expand, or correct an existing topic file.
An agent has produced a repeatable answer and the user has confirmed it should be saved.

If the request is purely structural (tiers, frontmatter contract, file layout), redirect to the Knowledge Base Schema — this skill is not the place to change rules.

Workflow

Decide the tier. Apply the tier-selection guidance in the Structure section of the schema.
- Design system as a whole → Tier 1.
- One package → Tier 2.
- One component → Tier 3.
Confirm the tier with the user. Present the chosen tier and the reasoning behind it, and ask the user whether they agree or want a different tier. Do not proceed to Step 3 until the user has explicitly confirmed the tier. If the user picks a different tier, revise the selection and re-confirm before continuing.
Search before writing. The index is sharded by tier — see the Index section of the schema for the full lookup order. Read only the shard that matches the tier you chose in Step 1:
- Tier 3 (component) → knowledge-base/index.components.json, filter by component/owner.
- Tier 2 (package) → knowledge-base/index.packages.json, filter by owner.
- Tier 1 (design system) → knowledge-base/index.root.json.
If the narrowest shard has no canonical entry, escalate outward (component → packages → root). If a canonical topic already exists at another tier, link to it instead of duplicating (see Rule 3 of the schema). Only create a new file when no overlap is found.
Create or update knowledge-base/<topic>.md at the chosen level.
- For Tier 3 (component) topics, the file name must appear in topic-constraints.config.json. Do not invent new Tier 3 topic names; if a new one is genuinely needed, update the config file first and call it out in the PR.
- Do not create topic subfolders inside knowledge-base/. Image assets may live in nested asset folders (for example knowledge-base/images/...) — see the Iron Law in the schema.
Add or update the required frontmatter. The required fields, value constraints, and tier-specific overrides are defined in frontmatter.config.json. Read that file directly to produce a valid frontmatter block; do not guess.
- AI-drafted content must still be signed off by a human reviewer before merge (see Rule 5 of the schema).
Structure the body (Tier 3 topics only). For component-level topics, the body must follow the heading hierarchy defined in body.config.json. Read that file directly before drafting or editing content. Do not invent new section or sub-section headings without first adding them to body.config.json and calling that out to the user.
Validate the knowledge-base. Run:
```
yarn knowledge-base:validate
```
Fix any errors before proceeding. Validation checks frontmatter fields, body structure, and topic-constraint adherence.
Regenerate the index. Run:
```
yarn knowledge-base:index
```
Commit every updated knowledge-base/index.*.json shard alongside your topic file. The generator also runs in --check mode in pre-commit and CI; a stale or invalid shard will fail the build.
Route through a human reviewer. AI-drafted knowledge-base content must be confirmed by a human before merge (see Rule 5 of the schema). Surface the diff explicitly so the reviewer can verify both content accuracy and tier placement.

Updating an existing topic

The workflow above applies. Additional notes:

Do not move a topic between tiers without first checking that no other document links to its old path. Update inbound links in the same change.
If an update would introduce duplication with another tier's canonical topic, delete the duplicate content and link to the canonical instead (Rule 3). Do not leave both copies.