Brainstorming
xpinjection/test-driven-spring-boot
You MUST use this before any creative work - creating features, building components, adding functionality, or modifying behavior.
Design a real harness for an agentic system using Claude Code-inspired patterns.
Install Claude Code Harness
$ npx skills add hashgraph-online/awesome-codex-plugins --skill claude-code-harness -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install hashgraph-online/awesome-codex-plugins claude-code-harness --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/hashgraph-online/awesome-codex-plugins.git skills-src && mkdir -p .claude/skills && cp -r skills-src/plugins/dadwadw233/claude-code-harness/skills/claude-code-harness .claude/skills/claude-code-harness && 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 "claude-code-harness" agent skill from https://github.com/hashgraph-online/awesome-codex-plugins/tree/main/plugins/dadwadw233/claude-code-harness/skills/claude-code-harness into .claude/skills/claude-code-harness/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "claude-code-harness", 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/hashgraph-online/awesome-codex-plugins/tree/main/plugins/dadwadw233/claude-code-harness/skills/claude-code-harnessType 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 hashgraph-online/awesome-codex-plugins --skill claude-code-harness -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install hashgraph-online/awesome-codex-plugins claude-code-harness --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/hashgraph-online/awesome-codex-plugins.git skills-src && mkdir -p .agents/skills && cp -r skills-src/plugins/dadwadw233/claude-code-harness/skills/claude-code-harness .agents/skills/claude-code-harness && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "claude-code-harness" agent skill from https://github.com/hashgraph-online/awesome-codex-plugins/tree/main/plugins/dadwadw233/claude-code-harness/skills/claude-code-harness into .agents/skills/claude-code-harness/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "claude-code-harness", 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 hashgraph-online/awesome-codex-plugins --skill claude-code-harness -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install hashgraph-online/awesome-codex-plugins claude-code-harness --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/hashgraph-online/awesome-codex-plugins.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/plugins/dadwadw233/claude-code-harness/skills/claude-code-harness .cursor/skills/claude-code-harness && 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 "claude-code-harness" agent skill from https://github.com/hashgraph-online/awesome-codex-plugins/tree/main/plugins/dadwadw233/claude-code-harness/skills/claude-code-harness into .cursor/skills/claude-code-harness/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "claude-code-harness", 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/hashgraph-online/awesome-codex-plugins.git --path plugins/dadwadw233/claude-code-harness/skills/claude-code-harness--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 hashgraph-online/awesome-codex-plugins --skill claude-code-harness -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install hashgraph-online/awesome-codex-plugins claude-code-harness --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/hashgraph-online/awesome-codex-plugins.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/plugins/dadwadw233/claude-code-harness/skills/claude-code-harness .gemini/skills/claude-code-harness && 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 "claude-code-harness" agent skill from https://github.com/hashgraph-online/awesome-codex-plugins/tree/main/plugins/dadwadw233/claude-code-harness/skills/claude-code-harness into .gemini/skills/claude-code-harness/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "claude-code-harness", 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 hashgraph-online/awesome-codex-plugins claude-code-harnessInstalls 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 hashgraph-online/awesome-codex-plugins --skill claude-code-harness -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/hashgraph-online/awesome-codex-plugins.git skills-src && mkdir -p .github/skills && cp -r skills-src/plugins/dadwadw233/claude-code-harness/skills/claude-code-harness .github/skills/claude-code-harness && 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 "claude-code-harness" agent skill from https://github.com/hashgraph-online/awesome-codex-plugins/tree/main/plugins/dadwadw233/claude-code-harness/skills/claude-code-harness into .github/skills/claude-code-harness/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "claude-code-harness", 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 hashgraph-online/awesome-codex-plugins --skill claude-code-harness -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install hashgraph-online/awesome-codex-plugins claude-code-harness --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/hashgraph-online/awesome-codex-plugins.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/plugins/dadwadw233/claude-code-harness/skills/claude-code-harness .opencode/skills/claude-code-harness && 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 "claude-code-harness" agent skill from https://github.com/hashgraph-online/awesome-codex-plugins/tree/main/plugins/dadwadw233/claude-code-harness/skills/claude-code-harness into .opencode/skills/claude-code-harness/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "claude-code-harness", 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
claude-code-harness- GitHub stars
- 1.2k
- Token cost
- ~1.3k tokens
- SKILL.md length
- 654 words
- Files
- 7 (incl. references)
- Skills in repo
- 736
- Repo updated
- First seen
- Licence
- MIT
At a glance
Design a real harness for an agentic system using Claude Code-inspired patterns.
- Works in 9 steps: Clarify whether the user needs a harness… → Define the harness boundary → Design request assembly before… → …
- The user needs a harness blueprint
- SKILL.md covers What to optimize for, Output contract, Workflow and Anti-patterns, plus 2 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Claude Code Harness is an agent skill from hashgraph-online/awesome-codex-plugins. Design a real harness for an agentic system using Claude Code-inspired patterns. Use when the user needs a harness blueprint, request assembly design, execution loop, tool runtime, memory layering, permission model, transcript or recovery strategy, or wants to turn a vague agent idea into a harness-level architecture. Do not use for generic product brainstorming, simple prompt writing, or isolated code generation.
Its SKILL.md is about 1.3k tokens, which your agent loads only when the skill is triggered. The skill folder holds 8 other files, including reference files (for example `agents/openai.yaml`, `references/claude-code-derived-insights.md` and `references/harness-blueprint-template.md`).
It sits in Agent Workflows, covering Authorization and RBAC and Brainstorming. The repository describes itself as: A curated list of awesome OpenAI Codex / ChatGPT plugins, skills, and resources. The 1 Codex Marketplace. See live plugins at: https://hol.org/plugins/best-codex-plugins. The licence is MIT.
When your agent uses it
- The user needs a harness blueprint
- Request assembly design
- Memory layering
- Permission model
Example prompts
- “/claude-code-harness”
Workflow steps
9 steps, taken from the step headings in SKILL.md.
- Clarify whether the user needs a harness at all
- Define the harness boundary
- Design request assembly before discussing autonomy
- Design the turn loop
- Treat tools as a runtime plane
- Treat memory as multiple layers
- Design safety and control into the runtime
- Design persistence and recovery
- End with implementation order
What it can do on your machine
Read from SKILL.md and the folder at commit 16b4156. 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
Claude Code Harness loads about 1.3k tokens when it runs, and up to ~3.4k if it reads all its reference files. Until then it costs about 109 tokens; SKILL.md has 654 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 hashgraph-online/awesome-codex-plugins at commit 16b4156, republished under its MIT licence (© hashgraph-online). 654 words, ~1,305 tokens.
Download SKILL.mdSave it as
.claude/skills/claude-code-harness/SKILL.md (or your agent's skills folder). This skill also uses 6 other files; get the full folder from GitHub.- name
- claude-code-harness
- description
- Design a real harness for an agentic system using Claude Code-inspired patterns. Use when the user needs a harness blueprint, request assembly design, execution loop, tool runtime, memory layering, permission model, transcript or recovery strategy, or wants to turn a vague agent idea into a harness-level architecture. Do not use for generic product brainstorming, simple prompt writing, or isolated code generation.
Claude Code Harness
Design the harness, not just the agent prompt.
This skill helps turn an agent idea into a harness blueprint that specifies:
- how a turn is assembled
- how the execution loop runs
- how tools are governed
- how memory survives boundaries
- how permissions and recovery are enforced
- how the system stays understandable to humans
What to optimize for
Prefer harnesses that are:
- explicit rather than magical
- layered rather than blended
- recoverable rather than one-shot
- bounded rather than overpowered
- product-useful rather than architecturally theatrical
Output contract
When this skill is active, default to a harness blueprint with these sections:
- System goal and delegation boundary
- Harness layers
- Request assembly design
- Turn loop design
- Tool and capability runtime
- Context and memory model
- Permissions and safety gates
- Transcript and recovery model
- Extension surfaces
- Implementation sequence
If the user is reviewing an existing design, lead with structural weaknesses and missing control planes.
Workflow
1. Clarify whether the user needs a harness at all
Start by answering:
- what job is being delegated
- what state must survive across steps or turns
- whether the system needs tools, memory, recovery, or background work
- what would break if the model were only called once
If the workflow does not need a harness, say so directly.
2. Define the harness boundary
Separate:
- the model
- the harness runtime
- external tools and systems
- durable storage
- human operators
The harness is the layer that governs the model, not the model itself.
For a deeper framing, read references/harness-principles.md.
3. Design request assembly before discussing autonomy
Specify:
- what instruction sources exist
- which sources are durable versus per-turn
- how system context and user context enter the request
- how tool affordances are exposed
- what transcript normalization or message repair is required before model calls
If request assembly is vague, the harness is still vague.
4. Design the turn loop
Make the loop explicit:
- gather context
- decide or plan
- call tools or act
- verify progress
- continue, compact, escalate, or stop
Prefer a small, legible loop over a large “AI orchestration” story.
5. Treat tools as a runtime plane
For each tool or action surface, define:
- purpose
- invocation boundary
- inputs and outputs
- permission gates
- success criteria
- rollback or recovery story
Tools are not just capabilities. They are governance boundaries.
Show full SKILL.md (274 more words)Show less
6. Treat memory as multiple layers
Separate at least these concerns when relevant:
- active turn context
- retrieved grounding
- working memory
- durable user or project memory
- summaries and compaction artifacts
Do not collapse memory into one implicit blob.
For reusable patterns, read references/harness-pattern-language.md.
7. Design safety and control into the runtime
Specify:
- approval points
- permission modes
- destructive action gates
- visibility into pending actions
- interruption and override behavior
The harness should make power legible before it makes power scalable.
8. Design persistence and recovery
Make explicit:
- what gets logged or transcripted
- what survives a new turn
- what survives a new session
- how partial work is resumed
- how compacted history preserves semantic continuity
If the system cannot recover from partial work, it is brittle.
9. End with implementation order
Translate the harness design into a build order:
- what must exist first
- what can be layered later
- what should be validated early
- what failure modes must be tested before expansion
Use references/harness-blueprint-template.md when a formal blueprint is required.
Anti-patterns
Push back on these designs:
- prompt-only agents described as full systems
- lots of tools but no runtime governance
- memory with no boundaries or rewrite policy
- hidden background work with no transcript or user visibility
- retry loops with no stop conditions
- permissions handled as an afterthought
- extension systems added before the core loop is coherent
Style guidance
- Be concrete about boundaries and data flow.
- Name missing runtime planes explicitly.
- Prefer fewer but stronger abstractions.
- If the design is performative rather than useful, say so.
References
- Core framing:
references/harness-principles.md - Pattern language:
references/harness-pattern-language.md - Blueprint format:
references/harness-blueprint-template.md - Claude-derived lessons:
references/claude-code-derived-insights.md
Load only the reference files you need and keep the final answer operational.
© hashgraph-online, 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 6 other files (references) in plugins/dadwadw233/claude-code-harness/skills/claude-code-harness of hashgraph-online/awesome-codex-plugins.
- SKILL.md
- LICENSE.txt
- agents/openai.yaml
- references/claude-code-derived-insights.md
- references/harness-blueprint-template.md
- references/harness-pattern-language.md
- references/harness-principles.md
Open the folder on GitHubat commit 16b4156
Compare with similar skills
Claude Code Harness 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 |
|---|---|---|---|---|---|---|
| Claude Code Harness this skillhashgraph-online/awesome-codex-plugins | 1.2k | — | ~1.3k | Automated safety check: Pass | MIT | |
| Brainstormingxpinjection/test-driven-spring-boot | 112 | 54 repos | ~2.6k | Automated safety check: Pass | MIT | |
| Cauracaura-ai/caura | 544 | — | ~6.2k | Automated safety check: Pass | Apache-2.0 | |
| Brainstormbkywksj/knowledge-base | 330 | — | ~1.4k | Automated safety check: Pass | Custom licence | |
| Agentsbutterbase-ai/butterbase-skills | 534 | 1 repos | ~1.8k | Automated safety check: Pass | MIT | |
| Fastmcp Serverdavila7/claude-code-templates | 32k | — | ~1.9k | Automated safety check: Pass | MIT |
Similar skills
Caura
caura-ai/caura
The agent's persistent long-term memory — the only knowledge that survives across sessions, shared across the fleet under access control.
Brainstorm
bkywksj/knowledge-base
当需要探索方案、头脑风暴、创意思维时自动使用此 Skill. An agent skill from bkywksj/knowledge-base.
Agents
butterbase-ai/butterbase-skills
A skill your agent uses when designing, deploying, or debugging a Butterbase Agent (declarative LLM/tool graph), registering an MCP server for tool use, or wiring access controls and rate limits.
Fastmcp Server
davila7/claude-code-templates
Complete guide for building MCP servers with FastMCP 3.0 - tools, resources, authentication, providers, middleware, and deployment.
Lmstudio Subagents
sundial-org/awesome-openclaw-skills
Reduces token usage from paid providers by offloading work to local LM Studio models.
More from hashgraph-online/awesome-codex-plugins
All 736 skills in this repoAnime Reaction Gif
hashgraph-online/awesome-codex-plugins
Create original anime-style reaction stickers as looping GIFs and MP4 previews, using generated character pose sheets and timed key poses.
Calibredb
hashgraph-online/awesome-codex-plugins
Manage and query Calibre libraries with the calibredb CLI (local paths or Calibre Content server URLs).
Rust API Test Harness
hashgraph-online/awesome-codex-plugins
A skill your agent uses when adding, changing, testing, or debugging Rust HTTP APIs and services, especially when Codex needs black-box integration tests, random-port app startup, real database test…
Art
hashgraph-online/awesome-codex-plugins
Make a studio's game look like something at build time — a cover from a real frame of the game (free), painted covers, backdrops, textures and character plates from image models through the…
Calle
hashgraph-online/awesome-codex-plugins
Use CALL-E from Codex through the calle CLI. An agent skill from hashgraph-online/awesome-codex-plugins.
Game Balance Economy
hashgraph-online/awesome-codex-plugins
Balance game difficulty, resources, rewards, probability, progression, economies, and dominant strategies.
Related
Categories
Questions about Claude Code Harness
What does Claude Code Harness do?
Design a real harness for an agentic system using Claude Code-inspired patterns. Claude Code Harness is an agent skill from hashgraph-online/awesome-codex-plugins. Design a real harness for an agentic system using Claude Code-inspired patterns.
When should I use Claude Code Harness?
Claude Code Harness fits situations like: the user needs a harness blueprint; request assembly design; memory layering; permission model.
How do I install Claude Code Harness in Claude Code?
Run `npx skills add hashgraph-online/awesome-codex-plugins --skill claude-code-harness -a claude-code`. Or copy the skill folder (plugins/dadwadw233/claude-code-harness/skills/claude-code-harness in hashgraph-online/awesome-codex-plugins) into .claude/skills/claude-code-harness in your project. Claude Code loads it when a task matches its description.
How do I install Claude Code Harness in Codex?
Run `npx skills add hashgraph-online/awesome-codex-plugins --skill claude-code-harness -a codex`. Or copy the skill folder (plugins/dadwadw233/claude-code-harness/skills/claude-code-harness in hashgraph-online/awesome-codex-plugins) into .agents/skills/claude-code-harness in your project. Codex loads it when a task matches its description.
Can I use Claude Code Harness 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 hashgraph-online/awesome-codex-plugins --skill claude-code-harness -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/claude-code-harness, .gemini/skills/claude-code-harness, .github/skills/claude-code-harness and .opencode/skills/claude-code-harness in your project.
What does Claude Code Harness need to run?
SKILL.md names no scripts, command-line tools or credentials: Claude Code Harness is instructions for the agent only.
Does Claude Code Harness 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 Claude Code Harness 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 Claude Code Harness use?
Claude Code Harness is published under the MIT licence (from the LICENSE file in the skill folder). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Claude Code Harness use?
About 1.3k tokens (SKILL.md is roughly 5.2k 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 2.1k tokens, read only when the agent opens those files.
What are the alternatives to Claude Code Harness?
Skills that share tags, products or a category with Claude Code Harness: Brainstorming (xpinjection/test-driven-spring-boot, 112 stars), Caura (caura-ai/caura, 544 stars), Brainstorm (bkywksj/knowledge-base, 330 stars) and Agents (butterbase-ai/butterbase-skills, 534 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Claude Code Harness?
hashgraph-online (a GitHub organization) maintains it in hashgraph-online/awesome-codex-plugins, which has 1,232 GitHub stars. The repository holds 736 skills in this directory. The repository was last updated on October 6, 2026.
Source: hashgraph-online/awesome-codex-plugins on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.