explain-plan-reader SKILL.md skillA
explain-plan-reader from skillmedev/skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add skillmedev/skills/explain-plan-reader@git:20261005.bea4ea5Pins git:20261005.bea4ea5 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- skillmedev/skills
- Path
skills/explain-plan-reader/SKILL.md- Versions recorded
- 3
- Latest version
- git:20261005.bea4ea5, committed Oct 5, 2026
- First version recorded
- Jul 5, 2026
- Size
- 4,990 bytes
- Repository stars
- 19
- License
- MIT
Read a captured EXPLAIN ANALYZE plan, name the single bottleneck node, and prescribe a targeted fix for it. Use when a specific query is slow and you have (or can capture) its execution plan from Postgres or MySQL and need to know WHICH node is burning the time and why.
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
# EXPLAIN Plan Reader Turn one captured execution plan into a named bottleneck node and a specific fix. A plan is a tree executed bottom-up and inside-out; your job is to find the one node where time or rows explode, not to audit every line. ## Workflow 1. **Demand a real plan first.** Do not diagnose from query text alone. In Postgres, require `EXPLAIN (ANALYZE, BUFFERS, FORMAT TEXT)` - ANALYZE runs the query for real timings, BUFFERS shows cache-vs-disk reads. In MySQL, require `EXPLAIN ANALYZE`. Plain `EXPLAIN` shows estimates only and lies under data skew; if that is all you have, say so and ask for ANALYZE output before prescribing. 2. **Run it twice.** The first run can be cold cache. Trust the warm run's timings unless cold-cache I/O is itself the problem (confirm via BUFFERS: high `read=` vs `hit=`). …
Read the whole file at its exact version.
How to install
mdr add skillmedev/skills/explain-plan-reader@sha256:597f67e3757a3dd3The line at the top of this page pins the label git:20261005.bea4ea5, 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_vl3fzqo3gqsh57tb)
1 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 3 versions of this file, between Jul 5, 2026 and Oct 5, 2026, about one every 46 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261005.bea4ea5 latest | 2026-10-05 | bea4ea5 | 4,990 B | A | view · diff |
| git:20260705.a28c4ce | 2026-07-05 | a28c4ce | 4,949 B | A | view · diff |
| git:20260705.acb5571 | 2026-07-05 | acb5571 | 4,963 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 (4990 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
skillmedev/skills · 19 stars · license MIT · pushed 2026-10-13 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_vl3fzqo3gqsh57tb GET https://markdownregistry.com/api/v1/resolve?ref=skillmedev/skills/explain-plan-reader GET https://markdownregistry.com/api/v1/blob/597f67e3757a3dd371a29efb395a2550f8de1e5371bb6b6c7fdacae613ae62fc
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.