Improving MCP Tools
PostHog/posthog
Run an improve-my-MCP campaign: an autoresearch-style loop that measures the MCP agent experience with the eval harness, picks the highest-impact tool problem from production data, makes one bounded…
Developer Experience specialist. An agent skill from aiskillstore/marketplace.
No licenceAuto-check passed
Install Dx Optimizer
$ npx skills add aiskillstore/marketplace --skill dx-optimizer -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install aiskillstore/marketplace dx-optimizer --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/aiskillstore/marketplace.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/sickn33/dx-optimizer .claude/skills/dx-optimizer && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "dx-optimizer" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/sickn33/dx-optimizer into .claude/skills/dx-optimizer/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "dx-optimizer", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/aiskillstore/marketplace/tree/main/skills/sickn33/dx-optimizerType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add aiskillstore/marketplace --skill dx-optimizer -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install aiskillstore/marketplace dx-optimizer --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/aiskillstore/marketplace.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/sickn33/dx-optimizer .agents/skills/dx-optimizer && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "dx-optimizer" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/sickn33/dx-optimizer into .agents/skills/dx-optimizer/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "dx-optimizer", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add aiskillstore/marketplace --skill dx-optimizer -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install aiskillstore/marketplace dx-optimizer --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/aiskillstore/marketplace.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/sickn33/dx-optimizer .cursor/skills/dx-optimizer && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "dx-optimizer" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/sickn33/dx-optimizer into .cursor/skills/dx-optimizer/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "dx-optimizer", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/aiskillstore/marketplace.git --path skills/sickn33/dx-optimizer--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add aiskillstore/marketplace --skill dx-optimizer -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install aiskillstore/marketplace dx-optimizer --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/aiskillstore/marketplace.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/sickn33/dx-optimizer .gemini/skills/dx-optimizer && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "dx-optimizer" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/sickn33/dx-optimizer into .gemini/skills/dx-optimizer/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "dx-optimizer", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install aiskillstore/marketplace dx-optimizerInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add aiskillstore/marketplace --skill dx-optimizer -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/aiskillstore/marketplace.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/sickn33/dx-optimizer .github/skills/dx-optimizer && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "dx-optimizer" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/sickn33/dx-optimizer into .github/skills/dx-optimizer/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "dx-optimizer", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add aiskillstore/marketplace --skill dx-optimizer -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install aiskillstore/marketplace dx-optimizer --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/aiskillstore/marketplace.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/sickn33/dx-optimizer .opencode/skills/dx-optimizer && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "dx-optimizer" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/sickn33/dx-optimizer into .opencode/skills/dx-optimizer/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "dx-optimizer", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
dx-optimizer- GitHub stars
- 430
- Used in
- 7 other repos
- Token cost
- ~665 tokens
- SKILL.md length
- 307 words
- Files
- 2
- Skills in repo
- 1,108
- Repo updated
- First seen
- Licence
- None found
At a glance
Developer Experience specialist. An agent skill from aiskillstore/marketplace.
- Works in 5 steps: Profile current developer workflows → Identify pain points and time sinks → Research best practices and tools → …
- SKILL.md covers Use this skill when, Do not use this skill when, Instructions and Optimization Areas, plus 4 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Dx Optimizer is an agent skill from aiskillstore/marketplace. Developer Experience specialist. Improves tooling, setup, and workflows. Use PROACTIVELY when setting up new projects, after team feedback, or when development friction is noticed.
Its SKILL.md is about 670 tokens, which your agent loads only when the skill is triggered. The skill folder holds 1 other file (for example `skill-report.json`).
The repository describes itself as: Security-audited skills for Claude, Codex & Claude Code. One-click install, quality verified.
Example prompts
- “/dx-optimizer”
Workflow steps
5 steps, taken from the first numbered list in SKILL.md.
- Profile current developer workflows
- Identify pain points and time sinks
- Research best practices and tools
- Implement improvements incrementally
- Measure impact and iterate
What it can do on your machine
Read from SKILL.md and the folder at commit ad8daf7. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md.
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Dx Optimizer loads about 665 tokens when it runs. Until then it costs about 48 tokens; SKILL.md has 307 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
Without a licence we can't republish the file, so here is its outline and opening line. It has 307 words (~665 tokens).
“You are a Developer Experience (DX) optimization specialist. Your mission is to reduce friction, automate repetitive tasks, and make development joyful and productive.”
- name
- dx-optimizer
- risk
- unknown
- source
- community
- date_added
- 2026-02-27
Files
SKILL.md and 1 other file in skills/sickn33/dx-optimizer of aiskillstore/marketplace.
- SKILL.md
- skill-report.json
Open the folder on GitHubat commit ad8daf7
Used in 7 other repositories
We found 16 copies of this SKILL.md (exact, near-identical or edited) in other folders, from 7 other GitHub owners. This page covers the copy in aiskillstore/marketplace, which our catalogue first saw on October 7, 2026.
- sickn33/agentic-awesome-skillsskills/dx-optimizerplugins/agentic-awesome-skills/skills/dx-optimizer+1 more
- rmyndharis/antigravity-skillsskills/dx-optimizer
- Dokhacgiakhoa/Agent-Skills-4-Vibe-Coding-CLI.agent/skills/dx-optimizer
- agent-skills-hub/agent-skills-hubskills/dx-optimizer
- lingxling/awesome-skills-cnantigravity-awesome-skills/skills/dx-optimizerantigravity-awesome-skills/plugins/agentic-awesome-skills/skills/dx-optimizer+1 more
- benjaminasterA/antigravity-awesome-skillsskills/dx-optimizer
- henryalouf/ruflow.agents/skills/dx-optimizer.agents/skills/antigravity-awesome-skills/skills/dx-optimizer+4 more
Compare with similar skills
Dx Optimizer next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Dx Optimizer this skillaiskillstore/marketplace | 430 | 7 repos | ~665 | Automated safety check: Pass | None | |
| Improving MCP ToolsPostHog/posthog | 40k | — | ~1.5k | Automated safety check: Pass | Custom licence | |
| MCP Tool Developersickn33/agentic-awesome-skills | 47k | 1 repos | ~1.2k | Automated safety check: Pass | MIT | |
| Tools Page SEO Optimizersickn33/agentic-awesome-skills | 47k | 1 repos | ~596 | Automated safety check: Pass | MIT | |
| Caffeine Cache Optimization Experimentsben-manes/caffeine | 18k | — | ~2.6k | Automated safety check: Notes | Apache-2.0 | |
| SQL Optimizationgithub/awesome-copilot | 40k | 2 repos | ~2.3k | Automated safety check: Pass | MIT |
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Questions about Dx Optimizer
What does Dx Optimizer do?
Developer Experience specialist. An agent skill from aiskillstore/marketplace. Dx Optimizer is an agent skill from aiskillstore/marketplace. Developer Experience specialist.
How do I install Dx Optimizer in Claude Code?
Run `npx skills add aiskillstore/marketplace --skill dx-optimizer -a claude-code`. Or copy the skill folder (skills/sickn33/dx-optimizer in aiskillstore/marketplace) into .claude/skills/dx-optimizer in your project. Claude Code loads it when a task matches its description.
How do I install Dx Optimizer in Codex?
Run `npx skills add aiskillstore/marketplace --skill dx-optimizer -a codex`. Or copy the skill folder (skills/sickn33/dx-optimizer in aiskillstore/marketplace) into .agents/skills/dx-optimizer in your project. Codex loads it when a task matches its description.
Can I use Dx Optimizer in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add aiskillstore/marketplace --skill dx-optimizer -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/dx-optimizer, .gemini/skills/dx-optimizer, .github/skills/dx-optimizer and .opencode/skills/dx-optimizer in your project.
What does Dx Optimizer need to run?
SKILL.md names no scripts, command-line tools or credentials: Dx Optimizer is instructions for the agent only.
Does Dx Optimizer access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Dx Optimizer safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Dx Optimizer use?
No licence was found for Dx Optimizer or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.
How many tokens does Dx Optimizer use?
About 665 tokens (SKILL.md is roughly 2.7k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Dx Optimizer?
Skills that share tags, products or a category with Dx Optimizer: Improving MCP Tools (PostHog/posthog, 40k stars), MCP Tool Developer (sickn33/agentic-awesome-skills, 47k stars), Tools Page SEO Optimizer (sickn33/agentic-awesome-skills, 47k stars) and Caffeine Cache Optimization Experiments (ben-manes/caffeine, 18k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Dx Optimizer?
aiskillstore (a GitHub organization) maintains it in aiskillstore/marketplace, which has 430 GitHub stars. The repository holds 1,108 skills in this directory. The repository was last updated on October 7, 2026.
Source: aiskillstore/marketplace on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.