hotspot-optimizer SKILL.md skillA
hotspot-optimizer from bjornmelin/dev-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add bjornmelin/dev-skills/hotspot-optimizer@git:20260726.b67ae30Pins git:20260726.b67ae30 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- bjornmelin/dev-skills
- Path
plugins/claude-core/skills/hotspot-optimizer/SKILL.md- Versions recorded
- 2
- Latest version
- git:20260726.b67ae30, committed Jul 26, 2026
- First version recorded
- Jun 25, 2026
- Size
- 3,054 bytes
- Repository stars
- 8
- License
- none declared
Finds algorithmic complexity and performance hotspots, then optimizes them behind tests without changing behavior. Use for nested loops, repeated scans, N+1 queries, costly re-renders, or when a request mentions hot paths or slow code. Defaults to an analysis-only report.
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
# Hotspot optimizer
Find and (on request) fix complexity/performance hotspots with **behavior preserved and proven by
tests**. Bias toward small, verified wins over broad rewrites.
## Core rule
Never change observable behavior. Every optimization preserves outputs, ordering, error semantics,
and public APIs — and is proven by a test that passed before and after.
## Loop: Triage → Prove → Optimize → Verify
1. **Triage** — get candidate leads fast, then reason about them:
- First pass (cheap, optional): `python3 scripts/scan_hotspots.py <root> --format json` for a
ranked multi-language lead list. Treat output as *leads, not proof*.
- Confirm with `Grep`/`Glob`/`Read`: nested loops over the same data, membership tests in a loop
(list vs set), sort-in-loop, pairwise comparisons, repeated scans, render recomputation, N+1
queries. Rank by impact (hot path × input size), not raw count.
2. **Prove** — before touching hot code, run/author a focused test that pins current behavior and, if
feasible, a quick timing or complexity witness.
3. **Optimize** — apply the smallest localized `Edit` that lowers complexity (see
…Read the whole file at its exact version.
How to install
mdr add bjornmelin/dev-skills/hotspot-optimizer@sha256:432a2c7c97a40c74The line at the top of this page pins the label git:20260726.b67ae30, 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_yjpicrdva7f3mfoc)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between Jun 25, 2026 and Jul 26, 2026, about one every 32 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260726.b67ae30 latest | 2026-07-26 | b67ae30 | 3,054 B | A | view · diff |
| git:20260625.dee2db9 | 2026-06-25 | dee2db9 | 3,586 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 (3054 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
bjornmelin/dev-skills · 8 stars · license none declared · pushed 2026-10-27 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_yjpicrdva7f3mfoc GET https://markdownregistry.com/api/v1/resolve?ref=bjornmelin/dev-skills/hotspot-optimizer GET https://markdownregistry.com/api/v1/blob/432a2c7c97a40c74a64560cb6c255e2bcc276a6cb9d4dcd0a375d10a9cb24fba
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.