Agent Specification
ruvnet/ruflo
Agent skill for specification - invoke with $agent-specification
Create and improve agent skills following the Agent Skills specification.
MITAuto-check passed
Install Skill Writer
$ npx skills add sickn33/agentic-awesome-skills --skill skill-writer -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install sickn33/agentic-awesome-skills skill-writer --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/sickn33/agentic-awesome-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/skill-writer .claude/skills/skill-writer && 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 "skill-writer" agent skill from https://github.com/sickn33/agentic-awesome-skills/tree/main/skills/skill-writer into .claude/skills/skill-writer/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "skill-writer", 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/sickn33/agentic-awesome-skills/tree/main/skills/skill-writerType 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 sickn33/agentic-awesome-skills --skill skill-writer -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install sickn33/agentic-awesome-skills skill-writer --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/sickn33/agentic-awesome-skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/skill-writer .agents/skills/skill-writer && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "skill-writer" agent skill from https://github.com/sickn33/agentic-awesome-skills/tree/main/skills/skill-writer into .agents/skills/skill-writer/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "skill-writer", 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 sickn33/agentic-awesome-skills --skill skill-writer -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install sickn33/agentic-awesome-skills skill-writer --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/sickn33/agentic-awesome-skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/skill-writer .cursor/skills/skill-writer && 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 "skill-writer" agent skill from https://github.com/sickn33/agentic-awesome-skills/tree/main/skills/skill-writer into .cursor/skills/skill-writer/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "skill-writer", 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/sickn33/agentic-awesome-skills.git --path skills/skill-writer--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 sickn33/agentic-awesome-skills --skill skill-writer -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install sickn33/agentic-awesome-skills skill-writer --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/sickn33/agentic-awesome-skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/skill-writer .gemini/skills/skill-writer && 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 "skill-writer" agent skill from https://github.com/sickn33/agentic-awesome-skills/tree/main/skills/skill-writer into .gemini/skills/skill-writer/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "skill-writer", 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 sickn33/agentic-awesome-skills skill-writerInstalls 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 sickn33/agentic-awesome-skills --skill skill-writer -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/sickn33/agentic-awesome-skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/skill-writer .github/skills/skill-writer && 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 "skill-writer" agent skill from https://github.com/sickn33/agentic-awesome-skills/tree/main/skills/skill-writer into .github/skills/skill-writer/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "skill-writer", 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 sickn33/agentic-awesome-skills --skill skill-writer -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install sickn33/agentic-awesome-skills skill-writer --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/sickn33/agentic-awesome-skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/skill-writer .opencode/skills/skill-writer && 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 "skill-writer" agent skill from https://github.com/sickn33/agentic-awesome-skills/tree/main/skills/skill-writer into .opencode/skills/skill-writer/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "skill-writer", 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
skill-writer- GitHub stars
- 47k
- Used in
- 2 other repos
- Token cost
- ~1.3k tokens
- SKILL.md length
- 559 words
- Files
- 13 (incl. references)
- Skills in repo
- 1,493
- Repo updated
- First seen
- Licence
- MIT
At a glance
Create and improve agent skills following the Agent Skills specification.
- Works in 7 steps: Resolve target and path → Run synthesis when needed → Run iteration first when improving from… → …
- Asked to create
- SKILL.md covers Step 1: Resolve target and path, Step 2: Run synthesis when…, Step 3: Run iteration first… and Step 4: Author or update skill…, plus 6 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Skill Writer is an agent skill from sickn33/agentic-awesome-skills. Create and improve agent skills following the Agent Skills specification. Use when asked to create, write, or update skills.
Its SKILL.md is about 1.3k tokens, which your agent loads only when the skill is triggered. The skill folder holds 14 other files, including reference files (for example `references/authoring-path.md`, `references/description-optimization.md` and `references/design-principles.md`).
The repository describes itself as: AAS Core is the local, agent-first control plane for complete catalog discovery, agent-owned selection, stack validation, and planning, backed by 2,400+ agentic skills. Includes… The licence is MIT.
When your agent uses it
- Asked to create
Example prompts
- “/skill-writer”
Workflow steps
7 steps, taken from the step headings in SKILL.md.
What it can do on your machine
Read from SKILL.md and the folder at commit 680176d. 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
Skill Writer loads about 1.3k tokens when it runs, and up to ~4.1k if it reads all its reference files. Until then it costs about 34 tokens; SKILL.md has 559 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 sickn33/agentic-awesome-skills at commit 680176d, republished under its MIT licence (© sickn33). 559 words, ~1,273 tokens.
Download SKILL.mdSave it as
.claude/skills/skill-writer/SKILL.md (or your agent's skills folder). This skill also uses 12 other files; get the full folder from GitHub.- name
- skill-writer
- description
- Create and improve agent skills following the Agent Skills specification. Use when asked to create, write, or update skills.
- risk
- critical
- source
- community
- date_added
- 2026-09-04
Skill Writer
Use this as the single canonical workflow for skill creation and improvement. Primary success condition: maximize high-value input coverage before authoring so the resulting skill has minimal blind spots.
Load only the path(s) required for the task:
| Task | Read |
|---|---|
| Set skill class and required dimensions | references/mode-selection.md |
| Apply writing constraints for depth vs concision | references/design-principles.md |
| Select structure pattern for this skill | references/skill-patterns.md |
| Select workflow orchestration pattern for process-heavy skills | references/workflow-patterns.md |
| Select output format pattern for deterministic quality | references/output-patterns.md |
| Choose workflow path and required outputs | references/mode-selection.md |
| Load representative synthesis examples by skill type | references/examples/*.md |
| Synthesize external/local sources with depth gates | references/synthesis-path.md |
| Author or update SKILL.md and supporting files | references/authoring-path.md |
| Optimize skill description and trigger precision | references/description-optimization.md |
| Iterate using positive/negative/fix examples | references/iteration-path.md |
| Evaluate behavior and compare baseline vs with-skill (opt-in quantitative) | references/evaluation-path.md |
| Register and validate skill changes | references/registration-validation.md |
Step 1: Resolve target and path
- Resolve target skill path and intended operation (
create,update,synthesize,iterate). - Read
references/mode-selection.mdand select the required path(s). - Classify the skill (
workflow-process,integration-documentation,security-review,skill-authoring,generic). - Ask one direct question if class or depth requirements are ambiguous; otherwise state explicit assumptions.
Step 2: Run synthesis when needed
Read references/synthesis-path.md.
- Collect and score relevant sources with provenance.
- Apply trust and safety rules when ingesting external content.
- Produce source-backed decisions and coverage/gap status.
- Load one or more profiles from
references/examples/*.mdwhen the skill is hybrid. - Enforce baseline source pack for skill-authoring workflows.
- Enforce depth gates before moving to authoring.
Step 3: Run iteration first when improving from outcomes/examples
Read references/iteration-path.md first when selected path includes iteration (for example operation iterate).
- Capture and anonymize examples with provenance.
- Re-evaluate skill behavior against working and holdout slices.
- Propose improvements from positive/negative/fix evidence.
- Carry concrete behavior deltas into authoring.
Skip this step when selected path does not include iteration.
Show full SKILL.md (249 more words)Show less
Step 4: Author or update skill artifacts
Read references/authoring-path.md.
- Write or update
SKILL.mdin imperative voice with trigger-rich description. - Create focused reference files and scripts only when justified.
- Follow
references/skill-patterns.md,references/workflow-patterns.md, andreferences/output-patterns.mdfor structure and output determinism. - For authoring/generator skills, include transformed examples in references:
- happy-path
- secure/robust variant
- anti-pattern + corrected version
Step 5: Optimize description quality
Read references/description-optimization.md.
- Validate should-trigger and should-not-trigger query sets.
- Reduce false positives and false negatives with targeted description edits.
- Keep trigger language generic across Codex and Claude.
Step 6: Evaluate outcomes
Read references/evaluation-path.md.
- Run a lightweight qualitative check by default (recommended).
- For integration/documentation and skill-authoring skills, include the concise depth rubric from
references/evaluation-path.md. - Run deeper eval playbook and quantitative baseline-vs-with-skill only when requested or risk warrants it.
- Record outcomes and unresolved risks.
Step 7: Register and validate
Read references/registration-validation.md.
- Apply repository registration steps.
- Run quick validation with strict depth gates.
- Reject shallow outputs that fail depth gates or required artifact checks.
Output format
Return:
SummaryChanges MadeValidation ResultsOpen Gaps
When to Use
Use this skill when tackling tasks related to its primary domain or functionality as described above.
Limitations
- Use this skill only when the task clearly matches the scope described above.
- Do not treat the output as a substitute for environment-specific validation, testing, or expert review.
- Stop and ask for clarification if required inputs, permissions, safety boundaries, or success criteria are missing.
© sickn33, 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 12 other files (references) in skills/skill-writer of sickn33/agentic-awesome-skills.
- SKILL.md
- references/authoring-path.md
- references/description-optimization.md
- references/design-principles.md
- references/evaluation-path.md
- references/examples/workflow-process.md
- references/iteration-path.md
- references/mode-selection.md
- references/output-patterns.md
- references/registration-validation.md
- references/skill-patterns.md
- references/synthesis-path.md
- references/workflow-patterns.md
Open the folder on GitHubat commit 680176d
Used in 2 other repositories
We found 11 copies of this SKILL.md (exact, near-identical or edited) in other folders, from 2 other GitHub owners. This page covers the copy in sickn33/agentic-awesome-skills, which our catalogue first saw on October 7, 2026.
Compare with similar skills
Skill Writer 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 |
|---|---|---|---|---|---|---|
| Skill Writer this skillsickn33/agentic-awesome-skills | 47k | 2 repos | ~1.3k | Automated safety check: Pass | MIT | |
| Agent Specificationruvnet/ruflo | 74k | 2 repos | ~1.8k | Automated safety check: Pass | MIT | |
| Grant Specific Aims Writeraipoch/medical-research-skills | 2k | — | ~1.8k | Automated safety check: Pass | MIT | |
| Specificity Managementthedaviddias/Front-End-Checklist | 74k | — | ~477 | Automated safety check: Pass | MIT | |
| Create Specificationgithub/awesome-copilot | 40k | 1 repos | ~1.4k | Automated safety check: Pass | MIT | |
| Update Specificationgithub/awesome-copilot | 40k | 1 repos | ~1.4k | Automated safety check: Pass | MIT |
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Grant Specific Aims Writer
aipoch/medical-research-skills
Writes Specific Aims pages for grant applications. An agent skill from aipoch/medical-research-skills.
Specificity Management
thedaviddias/Front-End-Checklist
A skill your agent uses when reviewing stylesheets, component styles, and responsive behavior related to Keep CSS specificity low and flat.
- Official
Create Specification
github/awesome-copilot
Create a new specification file for the solution, optimized for Generative AI consumption.
- Official
Update Specification
github/awesome-copilot
Update an existing specification file for the solution, optimized for Generative AI consumption based on new requirements or updates to any existing code.
Concept Page Test Writer
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Questions about Skill Writer
What does Skill Writer do?
Create and improve agent skills following the Agent Skills specification. Skill Writer is an agent skill from sickn33/agentic-awesome-skills. Create and improve agent skills following the Agent Skills specification.
When should I use Skill Writer?
Skill Writer fits situations like: asked to create.
How do I install Skill Writer in Claude Code?
Run `npx skills add sickn33/agentic-awesome-skills --skill skill-writer -a claude-code`. Or copy the skill folder (skills/skill-writer in sickn33/agentic-awesome-skills) into .claude/skills/skill-writer in your project. Claude Code loads it when a task matches its description.
How do I install Skill Writer in Codex?
Run `npx skills add sickn33/agentic-awesome-skills --skill skill-writer -a codex`. Or copy the skill folder (skills/skill-writer in sickn33/agentic-awesome-skills) into .agents/skills/skill-writer in your project. Codex loads it when a task matches its description.
Can I use Skill Writer 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 sickn33/agentic-awesome-skills --skill skill-writer -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/skill-writer, .gemini/skills/skill-writer, .github/skills/skill-writer and .opencode/skills/skill-writer in your project.
What does Skill Writer need to run?
SKILL.md names no scripts, command-line tools or credentials: Skill Writer is instructions for the agent only.
Does Skill Writer 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 Skill Writer 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 Skill Writer use?
Skill Writer 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 Skill Writer use?
About 1.3k tokens (SKILL.md is roughly 5.1k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 2.8k tokens, read only when the agent opens those files.
What are the alternatives to Skill Writer?
Skills that share tags, products or a category with Skill Writer: Agent Specification (ruvnet/ruflo, 74k stars), Grant Specific Aims Writer (aipoch/medical-research-skills, 2k stars), Specificity Management (thedaviddias/Front-End-Checklist, 74k stars) and Create Specification (github/awesome-copilot, 40k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Skill Writer?
sickn33 (a GitHub user) maintains it in sickn33/agentic-awesome-skills, which has 47,379 GitHub stars. The repository holds 1,493 skills in this directory. The repository was last updated on October 9, 2026.
Source: sickn33/agentic-awesome-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.