schema-projections SKILL.md skillA
schema-projections from estuary/agent-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add estuary/agent-skills/schema-projections@git:20260707.049f6aePins git:20260707.049f6ae in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- estuary/agent-skills
- Path
skills/schema-projections/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260707.049f6ae, committed Jul 7, 2026
- Size
- 2,851 bytes
- Repository stars
- 7
- License
- Apache-2.0
Add projections to collections to rename fields or map nested JSON paths to flat column names. Use when renaming fields for destination conventions, flattening nested paths to columns, or creating field aliases. Use when user says "rename field", "flatten nested JSON", "map JSON path to column", "field alias", or "projection".
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
# Projections
Add projections to collections to rename fields or map nested JSON paths to flat column names.
**Docs:** https://docs.estuary.dev/concepts/advanced/projections/
## When to Use
- Rename fields to match destination naming conventions
- Flatten nested JSON paths to column names (e.g., `/user/name` → `user_name`)
- Extract array elements as named fields
## Procedure
### Step 1: Pull the Collection Spec
```bash
flowctl catalog pull-specs --name <collection-name>
```
### Step 2: Add Projections
Add a `projections` stanza to the collection spec (top-level, alongside `key` and schema):
```yaml
collections:
tenant/your/collection:
schema: schema.yaml
key: [/id]
projections:
# Rename a top-level field
user_id: /id
# Flatten nested paths
customer_name: /customer/name
customer_email: /customer/email
# Extract array elements
primary_tag: /tags/0
```
Values are JSON Pointers: `/` separated, array indices numeric (`/tags/0`).
…Read the whole file at its exact version.
How to install
mdr add estuary/agent-skills/schema-projections@sha256:08f110e29b1f548aThe line at the top of this page pins the label git:20260707.049f6ae, 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_yagdi7qb4bzeynzx)
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Versions
The registry has recorded 1 version of this file, committed on Jul 7, 2026.
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Source
estuary/agent-skills · 7 stars · license Apache-2.0 · pushed 2026-11-04 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_yagdi7qb4bzeynzx GET https://markdownregistry.com/api/v1/resolve?ref=estuary/agent-skills/schema-projections GET https://markdownregistry.com/api/v1/blob/08f110e29b1f548afeba08498f11149bd6ff81d8737cf85f2d33477c789075fd
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.