dynamodb SKILL.md skillA
dynamodb from ericrisco/rsc-harness is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add ericrisco/rsc-harness/dynamodb@git:20260729.9b4d66aPins git:20260729.9b4d66a in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- ericrisco/rsc-harness
- Path
skills/dynamodb/SKILL.md- Versions recorded
- 2
- Latest version
- git:20260729.9b4d66a, committed Jul 29, 2026
- First version recorded
- Jun 2, 2026
- Size
- 12,221 bytes
- Repository stars
- 236
- License
- MIT
Use when modeling or operating a DynamoDB table: deriving partition/sort keys from access patterns, single-table vs table-per-entity, adding a GSI/LSI, on-demand vs provisioned capacity, or diagnosing hot-partition throttling. NOT relational schema/SQL/EXPLAIN (that is `postgresdb`), NOT aggregation-pipeline document modeling (that is `mongodb`).
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
# DynamoDB — access-pattern-first modeling and capacity DynamoDB is not a relational database with a different syntax. It has no joins, no ad-hoc queries, no server-side aggregation, and it punishes schema changes after launch. So the modeling discipline IS the work: enumerate every read and write the app must perform, THEN design keys so each one is a single `GetItem` or `Query`. Add an index only when the base table physically cannot serve a pattern. Decide capacity last. Your job here is to stop the user from treating DynamoDB like SQL. ## What you produce / what you refuse You deliver three artifacts, in this order: 1. **An access-pattern list** — a table of every query and write, with key condition, read/write, frequency, and what serves it. This is the contract the keys must satisfy. 2. **A key-design document** — entity → PK/SK encoding → which table or named GSI serves each pattern. 3. **A capacity + cost recommendation** — on-demand vs provisioned vs reserved, and the hot-partition risk. You **refuse** to: click through the AWS console, wire the IaC/CI provisioning pipeline (that is …
Read the whole file at its exact version.
How to install
mdr add ericrisco/rsc-harness/dynamodb@sha256:edbecfeeeef9b155The line at the top of this page pins the label git:20260729.9b4d66a, 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_f6svpkibfi3pku4t)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between Jun 2, 2026 and Jul 29, 2026, about one every 57 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260729.9b4d66a latest | 2026-07-29 | 9b4d66a | 12,221 B | A | view · diff |
| git:20260602.a962997 | 2026-06-02 | a962997 | 13,296 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (12221 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
ericrisco/rsc-harness · 236 stars · license MIT · pushed 2026-10-21 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_f6svpkibfi3pku4t GET https://markdownregistry.com/api/v1/resolve?ref=ericrisco/rsc-harness/dynamodb GET https://markdownregistry.com/api/v1/blob/edbecfeeeef9b155aebcec71fd294c77a342c85ec388826b4ce750be7e52112a
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.
More from ericrisco/rsc-harness
Every file in ericrisco/rsc-harness