Claude Code Agent Development
anthropics/claude-plugins-official
Explains how to write agents for Claude Code plugins: the markdown file with YAML frontmatter, trigger descriptions, model and color settings, and system prompt design.
One-shot profile analysis for seq-db — turns pprof profiles (and optional metrics/report) into a ranked list of concrete, profile-grounded optimization opportunities for the code.
Install Perf Analyze
$ npx skills add ozontech/seq-db --skill perf-analyze -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install ozontech/seq-db perf-analyze --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/ozontech/seq-db.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.claude/skills/perf-analyze .claude/skills/perf-analyze && 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 "perf-analyze" agent skill from https://github.com/ozontech/seq-db/tree/main/.claude/skills/perf-analyze into .claude/skills/perf-analyze/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "perf-analyze", 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/ozontech/seq-db/tree/main/.claude/skills/perf-analyzeType 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 ozontech/seq-db --skill perf-analyze -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install ozontech/seq-db perf-analyze --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/ozontech/seq-db.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.claude/skills/perf-analyze .agents/skills/perf-analyze && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "perf-analyze" agent skill from https://github.com/ozontech/seq-db/tree/main/.claude/skills/perf-analyze into .agents/skills/perf-analyze/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "perf-analyze", 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 ozontech/seq-db --skill perf-analyze -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install ozontech/seq-db perf-analyze --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/ozontech/seq-db.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.claude/skills/perf-analyze .cursor/skills/perf-analyze && 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 "perf-analyze" agent skill from https://github.com/ozontech/seq-db/tree/main/.claude/skills/perf-analyze into .cursor/skills/perf-analyze/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "perf-analyze", 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/ozontech/seq-db.git --path .claude/skills/perf-analyze--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 ozontech/seq-db --skill perf-analyze -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install ozontech/seq-db perf-analyze --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/ozontech/seq-db.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.claude/skills/perf-analyze .gemini/skills/perf-analyze && 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 "perf-analyze" agent skill from https://github.com/ozontech/seq-db/tree/main/.claude/skills/perf-analyze into .gemini/skills/perf-analyze/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "perf-analyze", 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 ozontech/seq-db perf-analyzeInstalls 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 ozontech/seq-db --skill perf-analyze -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/ozontech/seq-db.git skills-src && mkdir -p .github/skills && cp -r skills-src/.claude/skills/perf-analyze .github/skills/perf-analyze && 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 "perf-analyze" agent skill from https://github.com/ozontech/seq-db/tree/main/.claude/skills/perf-analyze into .github/skills/perf-analyze/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "perf-analyze", 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 ozontech/seq-db --skill perf-analyze -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install ozontech/seq-db perf-analyze --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/ozontech/seq-db.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.claude/skills/perf-analyze .opencode/skills/perf-analyze && 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 "perf-analyze" agent skill from https://github.com/ozontech/seq-db/tree/main/.claude/skills/perf-analyze into .opencode/skills/perf-analyze/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "perf-analyze", 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
perf-analyze- GitHub stars
- 133
- Token cost
- ~422 tokens
- SKILL.md length
- 166 words
- Files
- 1
- Skills in repo
- 5
- Repo updated
- First seen
- Licence
- Apache-2.0
At a glance
One-shot profile analysis for seq-db — turns pprof profiles (and optional metrics/report) into a ranked list of concrete, profile-grounded optimization opportunities for the code.
- Works in 4 steps: Locate the artifacts. Profiles the user… → Spawn the perf-analyzer subagent (Agent… → Relay the ranked findings — the overall… → …
- You have profiles and want to know what to optimize (e.g
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
- Tasks that involve Subagents
What it does
Perf Analyze is an agent skill from ozontech/seq-db. One-shot profile analysis for seq-db — turns pprof profiles (and optional metrics/report) into a ranked list of concrete, profile-grounded optimization opportunities for the code. Delegates to the perf-analyzer subagent and relays its findings. Use when you have profiles and want to know what to optimize (e.g. "analyze these CPU/heap profiles", "what's the hot path costing us?"). This proposes; it does not apply fixes.
Its SKILL.md is about 420 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Agent Workflows, covering Subagents. The repository describes itself as: seq-db is a scalable and high-performance database designed for storing and querying logs efficiently. The licence is Apache-2.0.
When your agent uses it
- You have profiles and want to know what to optimize (e.g
- Tasks that involve Subagents
Example prompts
- “analyze these CPU/heap profiles”
- “s the hot path costing us?”
- “/perf-analyze”
Workflow steps
4 steps, taken from the first numbered list in SKILL.md.
- Locate the artifacts. Profiles the user brought, or a run directory under
- Spawn the perf-analyzer subagent (Agent tool, `subagent_type
- Relay the ranked findings — the overall summary, then each hotspot with
- Do not apply fixes. After presenting, offer to implement a specific one on
What it can do on your machine
Read from SKILL.md and the folder at commit 70af159. 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
Perf Analyze loads about 422 tokens when it runs. Until then it costs about 109 tokens; SKILL.md has 166 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
The full file from ozontech/seq-db at commit 70af159, republished under its Apache-2.0 licence (© ozontech). 166 words, ~422 tokens.
Download SKILL.mdSave it as
.claude/skills/perf-analyze/SKILL.md (or your agent's skills folder).- name
- perf-analyze
- description
- One-shot profile analysis for seq-db — turns pprof profiles (and optional metrics/report) into a ranked list of concrete, profile-grounded optimization opportunities for the code. Delegates to the perf-analyzer subagent and relays its findings. Use when you have profiles and want to know what to optimize (e.g. "analyze these CPU/heap profiles", "what's the hot path costing us?"). This proposes; it does not apply fixes.
perf-analyze
A one-shot, profile-grounded analysis. Delegate the heavy profile reading to the
perf-analyzer subagent so the pprof output stays out of this context; you scope
and relay.
(For an autonomous run → analyze → apply → measure loop, use the perf-loop
skill, which drives this same subagent per iteration. Use this skill for a
standalone analysis of profiles you already have.)
Steps
Locate the artifacts. Profiles the user brought, or a run directory under
.perf-loop/<run>/(cpu.pprof,allocs.pprof,heap.pprof, …) plus itsreport.json/window.env. If there are none yet, point the user atperf-loop/scripts/stack.shto generate a run first.Spawn the
perf-analyzersubagent (Agent tool,subagent_type: "perf-analyzer") with the artifact paths, the scenario (write / search / aggregation / mixed), and a baseline run to diff against if one exists.Relay the ranked findings — the overall summary, then each hotspot with its evidence / cause / proposed change / confidence. Keep your own commentary minimal; the findings are the deliverable.
Do not apply fixes. After presenting, offer to implement a specific one on request.
© ozontech, Apache-2.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
Just SKILL.md in .claude/skills/perf-analyze of ozontech/seq-db.
Open the folder on GitHubat commit 70af159
Compare with similar skills
Perf Analyze 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 |
|---|---|---|---|---|---|---|
| Perf Analyze this skillozontech/seq-db | 133 | — | ~422 | Automated safety check: Pass | Apache-2.0 | |
| Claude Code Agent Developmentanthropics/claude-plugins-official | 37k | 8 repos | ~2.8k | Automated safety check: Pass | Apache-2.0 | |
| Subagent Driven DevelopmentAsvarox/allkaraoke | 261 | 37 repos | ~1.2k | Automated safety check: Pass | None | |
| Dispatching Parallel Agentsultralisp/ultralisp | 258 | 40 repos | ~1.5k | Automated safety check: Pass | None | |
| Paseo Advisor Second Opiniongetpaseo/paseo | 20k | 1 repos | ~756 | Automated safety check: Pass | Custom licence | |
| Task Observerrebelytics/one-skill-to-rule-them-all | 3.2k | 1 repos | ~12k | Automated safety check: Pass | CC-BY-4.0 |
Similar skills
- Official
Subagent Driven Development
Asvarox/allkaraoke
A skill your agent uses when executing implementation plans with independent tasks in the current session
Dispatching Parallel Agents
ultralisp/ultralisp
A skill your agent uses when facing 2+ independent tasks that can be worked on without shared state or sequential dependencies
Paseo Advisor Second Opinion
getpaseo/paseo
Launches one separate agent through Paseo to give a second opinion on the current task, with a self-contained briefing and no permission to edit files.
Task Observer
rebelytics/one-skill-to-rule-them-all
Monitors task execution for skill improvement opportunities.
O2 Review Loop
openobserve/openobserve
Splits a change into planner, coder and independent reviewer roles: you confirm a spec, a subagent implements it, and a separate reviewer checks each round's local WIP commit.
More from ozontech/seq-db
Perf Loop
ozontech/seq-db
Autonomous performance-optimization loop for seq-db driven by seqbazooka.
Code Navigation
ozontech/seq-db
How to navigate and explore Go code in this repo. An agent skill from ozontech/seq-db.
Perf Architect
ozontech/seq-db
Design-level performance review for seq-db — proposes data-structure, algorithmic, memory-layout, and architectural alternatives for a hot path, each with reasoning and a validation plan.
Code Review
ozontech/seq-db
Review the current code changes (branch diff vs main, a commit range, or a PR) for seq-db.
Related
Categories
Questions about Perf Analyze
What does Perf Analyze do?
One-shot profile analysis for seq-db — turns pprof profiles (and optional metrics/report) into a ranked list of concrete, profile-grounded optimization opportunities for the code. Perf Analyze is an agent skill from ozontech/seq-db. One-shot profile analysis for seq-db — turns pprof profiles (and optional metrics/report) into a ranked list of concrete, profile-grounded optimization opportunities for the code.
When should I use Perf Analyze?
Perf Analyze fits situations like: you have profiles and want to know what to optimize (e.g; tasks that involve Subagents.
How do I install Perf Analyze in Claude Code?
Run `npx skills add ozontech/seq-db --skill perf-analyze -a claude-code`. Or copy the skill folder (.claude/skills/perf-analyze in ozontech/seq-db) into .claude/skills/perf-analyze in your project. Claude Code loads it when a task matches its description.
How do I install Perf Analyze in Codex?
Run `npx skills add ozontech/seq-db --skill perf-analyze -a codex`. Or copy the skill folder (.claude/skills/perf-analyze in ozontech/seq-db) into .agents/skills/perf-analyze in your project. Codex loads it when a task matches its description.
Can I use Perf Analyze 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 ozontech/seq-db --skill perf-analyze -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/perf-analyze, .gemini/skills/perf-analyze, .github/skills/perf-analyze and .opencode/skills/perf-analyze in your project.
What does Perf Analyze need to run?
SKILL.md names no scripts, command-line tools or credentials: Perf Analyze is instructions for the agent only.
Does Perf Analyze 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 Perf Analyze 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 Perf Analyze use?
Perf Analyze is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Perf Analyze use?
About 422 tokens (SKILL.md is roughly 1.7k 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 Perf Analyze?
Skills that share tags, products or a category with Perf Analyze: Claude Code Agent Development (anthropics/claude-plugins-official, 37k stars), Subagent Driven Development (Asvarox/allkaraoke, 261 stars), Dispatching Parallel Agents (ultralisp/ultralisp, 258 stars) and Paseo Advisor Second Opinion (getpaseo/paseo, 20k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Perf Analyze?
ozontech (a GitHub organization) maintains it in ozontech/seq-db, which has 133 GitHub stars. The repository holds 5 skills in this directory. The repository was last updated on October 6, 2026.
Source: ozontech/seq-db on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.