database-query-diagnosis SKILL.md skillA
database-query-diagnosis from dayfinggg/openai-codex-agent-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add dayfinggg/openai-codex-agent-skills/database-query-diagnosis@git:20261029.276ae81Pins git:20261029.276ae81 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- dayfinggg/openai-codex-agent-skills
- Path
codex/skills/database-query-diagnosis/SKILL.md- Versions recorded
- 1
- Latest version
- git:20261029.276ae81, committed Oct 29, 2026
- Size
- 2,073 bytes
- Repository stars
- 8
- License
- MIT
Diagnose slow SQL, lock waits, or connection exhaustion using actual queries, plans, and workload evidence. Use for database latency and throughput defects, not routine schema design.
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
Locate the database bottleneck with evidence from the affected workload. 1. Establish the engine, version, database, role, time interval, query fingerprint, parameters, and user-visible symptom. Separate execution time from connection checkout, network time, and application materialization. 2. Inspect the schema, constraints, indexes, statistics, expected result grain, and relevant transaction boundaries. Reuse existing authorized access and keep queries bounded. 3. Read a plain execution plan where appropriate. Before EXPLAIN ANALYZE, inspect side effects and workload cost because it executes the statement. Use a safe representative environment when execution would exceed authorization. 4. Examine estimated and actual rows, loops, filtering, sort or hash spills, access paths, and wait events where available. A sequential scan or filesort is not automatically a defect. 5. For locking, identify blockers, transaction age, lock ordering, and application retry behavior. For connections, separate pool configuration, leaks, long transactions, and server saturation. …
Read the whole file at its exact version.
How to install
mdr add dayfinggg/openai-codex-agent-skills/database-query-diagnosis@sha256:fbe7873a8d5c0ef7The line at the top of this page pins the label git:20261029.276ae81, 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_jp7podvw4lkpbjnk)
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Versions
The registry has recorded 1 version of this file, committed on Oct 29, 2026.
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 (2073 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
dayfinggg/openai-codex-agent-skills · 8 stars · license MIT · pushed 2026-11-01 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_jp7podvw4lkpbjnk GET https://markdownregistry.com/api/v1/resolve?ref=dayfinggg/openai-codex-agent-skills/database-query-diagnosis GET https://markdownregistry.com/api/v1/blob/fbe7873a8d5c0ef716481e924324885519cdcb5ee450e16a87a443835ef3a4ad
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.