schema-field-selection SKILL.md skillA
schema-field-selection 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-field-selection@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-field-selection/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260707.049f6ae, committed Jul 7, 2026
- Size
- 6,751 bytes
- Repository stars
- 7
- License
- Apache-2.0
Control which fields are included or excluded in materializations using depth modes and field overrides. Use when reducing table width, including nested fields, excluding PII, or optimizing performance. Use when user says "exclude fields", "include nested field", "too many columns", "select specific fields", or "field depth".
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
# Field Selection for Materializations
Control which fields are included or excluded in materializations using depth modes and field overrides.
**Docs:** https://docs.estuary.dev/guides/customize-materialization-fields/
## When to Use
- Reduce table width by excluding unnecessary fields
- Include deeply nested fields that aren't selected by default
- Exclude sensitive fields from materializations (note: data still exists in the collection — for true PII protection, use redaction on the writeSchema instead)
- Override connector's default field recommendations
## Procedure
### Step 1: Pull the Materialization Spec
```bash
flowctl catalog pull-specs --name <materialization-name>
```
### Step 2: Configure Field Selection
Add or modify the `fields` stanza in the binding:
```yaml
bindings:
- source: tenant/your/collection
resource: { table: your_table }
fields:
recommended: true # Depth mode (see below)
require: # Object — explicitly include fields
deeply/nested/field: {}
another_field: {}
exclude: # Array — explicitly exclude fields
- sensitive_data
- debug_info
```
…Read the whole file at its exact version.
How to install
mdr add estuary/agent-skills/schema-field-selection@sha256:50ccd00750f50375The 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_fpcu4hit45pmla65)
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Versions
The registry has recorded 1 version of this file, committed on Jul 7, 2026.
Audit of the latest version
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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_fpcu4hit45pmla65 GET https://markdownregistry.com/api/v1/resolve?ref=estuary/agent-skills/schema-field-selection GET https://markdownregistry.com/api/v1/blob/50ccd00750f50375e7955ca1b56dc722f10389c3e29bf24e601e21c4a911055b
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.