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.
Create or revise OMA skills and their references. An agent skill from first-fluke/oh-my-agent.
Install Oma Skill Creation
$ npx skills add first-fluke/oh-my-agent --skill oma-skill-creation -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install first-fluke/oh-my-agent oma-skill-creation --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/first-fluke/oh-my-agent.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/oma-skill-creation .claude/skills/oma-skill-creation && 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 "oma-skill-creation" agent skill from https://github.com/first-fluke/oh-my-agent/tree/main/skills/oma-skill-creation into .claude/skills/oma-skill-creation/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "oma-skill-creation", 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/first-fluke/oh-my-agent/tree/main/skills/oma-skill-creationType 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 first-fluke/oh-my-agent --skill oma-skill-creation -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install first-fluke/oh-my-agent oma-skill-creation --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/first-fluke/oh-my-agent.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/oma-skill-creation .agents/skills/oma-skill-creation && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "oma-skill-creation" agent skill from https://github.com/first-fluke/oh-my-agent/tree/main/skills/oma-skill-creation into .agents/skills/oma-skill-creation/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "oma-skill-creation", 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 first-fluke/oh-my-agent --skill oma-skill-creation -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install first-fluke/oh-my-agent oma-skill-creation --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/first-fluke/oh-my-agent.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/oma-skill-creation .cursor/skills/oma-skill-creation && 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 "oma-skill-creation" agent skill from https://github.com/first-fluke/oh-my-agent/tree/main/skills/oma-skill-creation into .cursor/skills/oma-skill-creation/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "oma-skill-creation", 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/first-fluke/oh-my-agent.git --path skills/oma-skill-creation--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 first-fluke/oh-my-agent --skill oma-skill-creation -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install first-fluke/oh-my-agent oma-skill-creation --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/first-fluke/oh-my-agent.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/oma-skill-creation .gemini/skills/oma-skill-creation && 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 "oma-skill-creation" agent skill from https://github.com/first-fluke/oh-my-agent/tree/main/skills/oma-skill-creation into .gemini/skills/oma-skill-creation/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "oma-skill-creation", 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 first-fluke/oh-my-agent oma-skill-creationInstalls 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 first-fluke/oh-my-agent --skill oma-skill-creation -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/first-fluke/oh-my-agent.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/oma-skill-creation .github/skills/oma-skill-creation && 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 "oma-skill-creation" agent skill from https://github.com/first-fluke/oh-my-agent/tree/main/skills/oma-skill-creation into .github/skills/oma-skill-creation/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "oma-skill-creation", 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 first-fluke/oh-my-agent --skill oma-skill-creation -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install first-fluke/oh-my-agent oma-skill-creation --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/first-fluke/oh-my-agent.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/oma-skill-creation .opencode/skills/oma-skill-creation && 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 "oma-skill-creation" agent skill from https://github.com/first-fluke/oh-my-agent/tree/main/skills/oma-skill-creation into .opencode/skills/oma-skill-creation/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "oma-skill-creation", 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
oma-skill-creation- GitHub stars
- 1.3k
- Token cost
- ~1.5k tokens
- SKILL.md length
- 723 words
- Files
- 4
- Skills in repo
- 57
- Repo updated
- First seen
- Licence
- MIT
At a glance
Create or revise OMA skills and their references. An agent skill from first-fluke/oh-my-agent.
- Works in 6 steps: Read the target, its invoked resources,… → Select command-heavy, judgment-heavy, or… → Write the canonical procedure once.… → …
- Execution contracts
- SKILL.md covers Scheduling, Structural Flow, Logical Operations and References
- Calls git
What it does
Oma Skill Creation is an agent skill from first-fluke/oh-my-agent. Create or revise OMA skills and their references. Use for skill routing, execution contracts, conditional loading, and authoring validation.
Its SKILL.md is about 1.5k tokens, which your agent loads only when the skill is triggered. The skill folder holds 4 other files (for example `resources/prompt-evaluation.md`, `resources/ssl-lite-template.md` and `resources/validation-checklist.md`).
It sits in Agent Workflows. The repository describes itself as: Mechanical verification for AI coding agents — skills pack or full harness (stop-hook gates, artifact checks, independent judges). The licence is MIT.
When your agent uses it
- Execution contracts
- Conditional loading
- Authoring validation
Example prompts
- “/oma-skill-creation”
Workflow steps
6 steps, taken from the first numbered list in SKILL.md.
- Read the target, its invoked resources, and relevant repository rules. Identify which entry points run independently and which content the…
- Select command-heavy, judgment-heavy, or reference-heavy behavior. Use the template's minimal skeleton and optional sections only where…
- Write the canonical procedure once. Preserve exact command/output contracts, failure mechanisms, side effects, and harmful-action limits…
- Index resources once under References with load conditions. Keep source-adjacent evidence one hop from SKILL.md where possible.
- Run oma skill lint --skill and git diff --check. If routing descriptions changed, run oma skill audit. Apply the content checks in…
- Report the changes, checks, and remaining limits. Do not claim reduced token usage merely from removing duplicate files; measure the…
What it can do on your machine
Read from SKILL.md and the folder at commit b364119. 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
Shell commands in SKILL.md call:
git
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md. Its commands use git, which can reach the network depending on how they are called.
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
Oma Skill Creation loads about 1.5k tokens when it runs. Until then it costs about 40 tokens; SKILL.md has 723 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 first-fluke/oh-my-agent at commit b364119, republished under its MIT licence (© first-fluke). 723 words, ~1,510 tokens.
Download SKILL.mdSave it as
.claude/skills/oma-skill-creation/SKILL.md (or your agent's skills folder). This skill also uses 3 other files; get the full folder from GitHub.- name
- oma-skill-creation
- description
- Create or revise OMA skills and their references. Use for skill routing, execution contracts, conditional loading, and authoring validation.
OMA Skill Authoring
Scheduling
Goal
Create or revise a usable OMA skill with clear routing, one execution path, domain-specific recovery, and proportionate context.
Intent signature
- Create, update, audit, or normalize an OMA skill, its resources, or the SSL-lite format.
- Decide whether content belongs inline, in a conditional resource, or should be removed.
When to use
- Authoring
.agents/skills/{name}/SKILL.mdand supporting resources. - Reviewing skill routing, execution contracts, reference loading, or duplicated instructions.
When NOT to use
- Installing third-party skills -> skill installer; creating a Codex plugin -> plugin tooling.
- Application implementation -> the owning specialist; project requirements ->
oma-pm.
Expected inputs
Skill purpose, triggers, boundaries, execution model, and existing commands/resources or user edits to preserve.
Expected outputs
A four-section SKILL.md, only necessary supporting resources, and validation results with unresolved limitations.
Dependencies
resources/ssl-lite-template.md for the skeleton and resources/validation-checklist.md for acceptance criteria. Use native file tools and available oma skill validators. Follow repository rules for source ownership and generated copies.
Structural Flow
Transitions
- New skill: compare 1–3 analogous skills, then use the template.
- Existing skill: preserve working domain detail and change only the requested scope.
- Repeated instructions: retain one authoritative location and a short reference where independently invoked entry points need it.
- Long or conditional detail: move to a named resource with a load condition. Do not move a duplicate merely to keep it elsewhere.
- Machine-checkable artifacts: declare structured
outputs:as documented in the template.
Failure and recovery
| Failure | Recovery |
|---|---|
| Overbroad routing | Narrow triggers and add a concrete When NOT to use cross-route |
| Vague execution | Add actual objects, paths, command flags, and evidence to the canonical path |
| Repeated procedure in multiple sections | Keep the canonical procedure; retain only distinct branches or state transitions elsewhere |
| Required tool unavailable | Use the documented fallback; otherwise report which result cannot be verified |
| Conflicting source and generated copies | Use the repository's generation flow; do not hand-edit protected definitions |
Exit
A completed skill has valid structure, useful routing, executable steps, recoverable failures, valid references, and applicable validation evidence. Missing tools or unresolved assumptions must remain explicit.
Logical Operations
Canonical workflow path
- Read the target, its invoked resources, and relevant repository rules. Identify which entry points run independently and which content the runtime already injects.
- Select command-heavy, judgment-heavy, or reference-heavy behavior. Use the template's minimal skeleton and optional sections only where they add information.
- Write the canonical procedure once. Preserve exact command/output contracts, failure mechanisms, side effects, and harmful-action limits; remove generic restatements and redundant examples.
- Index resources once under References with load conditions. Keep source-adjacent evidence one hop from SKILL.md where possible.
- Run
oma skill lint --skill <name>andgit diff --check. If routing descriptions changed, runoma skill audit. Apply the content checks inresources/validation-checklist.mdthat automated lint does not cover. - Report the changes, checks, and remaining limits. Do not claim reduced token usage merely from removing duplicate files; measure the context actually loaded when making that claim.
Show full SKILL.md (242 more words)Show less
Resource scope and effects
Skill work reads and may change local definitions/resources and generated vendor copies through the authorized repository flow. User data and credentials are not skill examples. Commits and publishing require the corresponding authorization.
Guardrails
- Keep YAML
nameand a routing-gradedescription. Preserve the four top-level headings: Scheduling, Structural Flow, Logical Operations, References. - Keep one canonical command/workflow path, an Intent signature, When to use/When NOT to use, input/output expectations, failure recovery, and relevant effects/guardrails. Section titles beyond these are optional when their information is already represented.
- Entry, Scenes, Actions, and tool/scope tables must add distinct information. Do not repeat a procedure to fill the template.
- Keep SKILL.md under 500 body lines. Load supporting resources conditionally; do not create README/changelog/install documents inside a skill merely to explain the skill.
- Keep parsed output/schema examples. Do not prescribe decorative report layouts or add generic self-review loops; use runnable validators and explicit evidence requirements.
- Process bulk data through deterministic tools and return summaries/artifact paths instead of streaming raw data into context.
- Preserve unrelated user edits. Apply the shared execution policy to clarification, authorization, and verification.
References
- Prompt behavior and model comparisons:
resources/prompt-evaluation.md(routing, injection, authorization, or review-contract changes) - Skeleton and optional sections:
resources/ssl-lite-template.md(authoring or restructuring) - Acceptance criteria:
resources/validation-checklist.md(validation) - Context loading:
../_shared/core/context-loading.md(resource/injection decisions) - Quality principles:
../_shared/core/quality-principles.md(domain verification requirements) - Eval fixtures:
web/docs/guide/skill-eval.md(when measuring held-out task utility withoma skill evaloroma skill optimize)
© first-fluke, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
SKILL.md and 3 other files in skills/oma-skill-creation of first-fluke/oh-my-agent.
- SKILL.md
- resources/prompt-evaluation.md
- resources/ssl-lite-template.md
- resources/validation-checklist.md
Open the folder on GitHubat commit b364119
Used in 1 other repository
We found 2 copies of this SKILL.md (exact, near-identical or edited) in other folders. This page covers the copy in first-fluke/oh-my-agent, which our catalogue first saw on October 7, 2026.
Compare with similar skills
Oma Skill Creation 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 |
|---|---|---|---|---|---|---|
| Oma Skill Creation this skillfirst-fluke/oh-my-agent | 1.3k | — | ~1.5k | Automated safety check: Pass | MIT | |
| Claude Code Agent Developmentanthropics/claude-plugins-official | 38k | 7 repos | ~2.8k | Automated safety check: Pass | Apache-2.0 | |
| Copilot Session Failure Analysisdotnet/maui | 23k | — | ~3.4k | Automated safety check: Pass | MIT | |
| Mem0 CLI Memory Commandsmem0ai/mem0 | 67k | — | ~2k | Automated safety check: Notes | Apache-2.0 | |
| Create Agentvectorize-io/hindsight | 47k | — | ~1.1k | Automated safety check: Pass | MIT | |
| Google Antigravity SDKgoogle-antigravity/antigravity-sdk-python | 3.7k | — | ~2.1k | Automated safety check: Notes | Apache-2.0 |
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Related
Categories
Questions about Oma Skill Creation
What does Oma Skill Creation do?
Create or revise OMA skills and their references. An agent skill from first-fluke/oh-my-agent. Oma Skill Creation is an agent skill from first-fluke/oh-my-agent. Create or revise OMA skills and their references.
When should I use Oma Skill Creation?
Oma Skill Creation fits situations like: execution contracts; conditional loading; authoring validation.
How do I install Oma Skill Creation in Claude Code?
Run `npx skills add first-fluke/oh-my-agent --skill oma-skill-creation -a claude-code`. Or copy the skill folder (skills/oma-skill-creation in first-fluke/oh-my-agent) into .claude/skills/oma-skill-creation in your project. Claude Code loads it when a task matches its description.
How do I install Oma Skill Creation in Codex?
Run `npx skills add first-fluke/oh-my-agent --skill oma-skill-creation -a codex`. Or copy the skill folder (skills/oma-skill-creation in first-fluke/oh-my-agent) into .agents/skills/oma-skill-creation in your project. Codex loads it when a task matches its description.
Can I use Oma Skill Creation 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 first-fluke/oh-my-agent --skill oma-skill-creation -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/oma-skill-creation, .gemini/skills/oma-skill-creation, .github/skills/oma-skill-creation and .opencode/skills/oma-skill-creation in your project.
What does Oma Skill Creation need to run?
Going by SKILL.md and its folder, Oma Skill Creation needs the command-line tools its instructions call (git).
Does Oma Skill Creation access the network?
SKILL.md contains no URLs. Its commands use git, which can reach the network depending on how they are called. This is read from the text; nothing was executed.
Is Oma Skill Creation 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 Oma Skill Creation use?
Oma Skill Creation is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Oma Skill Creation use?
About 1.5k tokens (SKILL.md is roughly 6k 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 Oma Skill Creation?
Skills that share tags, products or a category with Oma Skill Creation: Claude Code Agent Development (anthropics/claude-plugins-official, 38k stars), Copilot Session Failure Analysis (dotnet/maui, 23k stars), Mem0 CLI Memory Commands (mem0ai/mem0, 67k stars) and Create Agent (vectorize-io/hindsight, 47k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Oma Skill Creation?
first-fluke (a GitHub organization) maintains it in first-fluke/oh-my-agent, which has 1,338 GitHub stars. The repository holds 57 skills in this directory. The repository was last updated on October 9, 2026.
Source: first-fluke/oh-my-agent on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.