db-optimization SKILL.md skillA
db-optimization from jdanigo/hydraia is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add jdanigo/hydraia/db-optimization@git:20260703.44486a5Pins git:20260703.44486a5 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- jdanigo/hydraia
- Path
skills/db-optimization/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260703.44486a5, committed Jul 3, 2026
- Size
- 3,292 bytes
- Repository stars
- 8
- License
- MIT
Use when the bottleneck is database-shaped — slow queries, lock timeouts, connection exhaustion, N+1 patterns, index questions, schema migrations on hot tables. Evidence-first DB playbook for PostgreSQL, MySQL/MariaDB, MongoDB, and Redis backing the db-performance-tuner agent.
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
# DB Optimization — EXPLAIN before you touch anything Playbook for the DB half of the Hydraia perf route. The `db-performance-tuner` agent does the diagnosis; this skill sets the rules the route runs under. <HARD-RULES> - Read-first: no change is proposed without its EXPLAIN plan, stat, or code evidence. Live DB unavailable → code/schema inference only, tagged UNVERIFIED, with the confirming commands listed for the human. - All write-shaped operations (create index, schema change, config change) are PLAN TASKS — reviewed, gated, never executed by a diagnosis agent. - Destructive or blocking operations (table rewrites, long locks) are flagged for explicit human approval in the plan; prefer and name the online variant per engine: `CREATE INDEX CONCURRENTLY` (Postgres), `ALGORITHM=INPLACE, LOCK=NONE` (MySQL), rolling index builds (Mongo). - Schema changes on live tables follow EXPAND-CONTRACT, no exceptions. - Redact literal data values from any plan/log excerpt that lands in a committed artifact. </HARD-RULES> ## Expand-contract migration protocol 1. **Expand:** add the new column/table/index alongside the old — additive, backward-compatible, online. …
Read the whole file at its exact version.
How to install
mdr add jdanigo/hydraia/db-optimization@sha256:d098b208e00145a4The line at the top of this page pins the label git:20260703.44486a5, 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_cec6py7x6wpzji6i)
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Versions
The registry has recorded 1 version of this file, committed on Jul 3, 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 (3292 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
jdanigo/hydraia · 8 stars · license MIT · pushed 2026-09-24 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_cec6py7x6wpzji6i GET https://markdownregistry.com/api/v1/resolve?ref=jdanigo/hydraia/db-optimization GET https://markdownregistry.com/api/v1/blob/d098b208e00145a4cf6bc3817dc3ec50f04b0f9a10fc7024a82a176db017c41a
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.