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.
“Parallel Agent Type Contracts”
Install Parallel Agent Contracts
$ npx skills add parcadei/Continuous-Claude-v3 --skill parallel-agent-contracts -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install parcadei/Continuous-Claude-v3 parallel-agent-contracts --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/parcadei/Continuous-Claude-v3.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.claude/skills/parallel-agent-contracts .claude/skills/parallel-agent-contracts && 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 "parallel-agent-contracts" agent skill from https://github.com/parcadei/Continuous-Claude-v3/tree/main/.claude/skills/parallel-agent-contracts into .claude/skills/parallel-agent-contracts/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "parallel-agent-contracts", 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/parcadei/Continuous-Claude-v3/tree/main/.claude/skills/parallel-agent-contractsType 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 parcadei/Continuous-Claude-v3 --skill parallel-agent-contracts -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install parcadei/Continuous-Claude-v3 parallel-agent-contracts --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/parcadei/Continuous-Claude-v3.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.claude/skills/parallel-agent-contracts .agents/skills/parallel-agent-contracts && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "parallel-agent-contracts" agent skill from https://github.com/parcadei/Continuous-Claude-v3/tree/main/.claude/skills/parallel-agent-contracts into .agents/skills/parallel-agent-contracts/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "parallel-agent-contracts", 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 parcadei/Continuous-Claude-v3 --skill parallel-agent-contracts -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install parcadei/Continuous-Claude-v3 parallel-agent-contracts --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/parcadei/Continuous-Claude-v3.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.claude/skills/parallel-agent-contracts .cursor/skills/parallel-agent-contracts && 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 "parallel-agent-contracts" agent skill from https://github.com/parcadei/Continuous-Claude-v3/tree/main/.claude/skills/parallel-agent-contracts into .cursor/skills/parallel-agent-contracts/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "parallel-agent-contracts", 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/parcadei/Continuous-Claude-v3.git --path .claude/skills/parallel-agent-contracts--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 parcadei/Continuous-Claude-v3 --skill parallel-agent-contracts -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install parcadei/Continuous-Claude-v3 parallel-agent-contracts --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/parcadei/Continuous-Claude-v3.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.claude/skills/parallel-agent-contracts .gemini/skills/parallel-agent-contracts && 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 "parallel-agent-contracts" agent skill from https://github.com/parcadei/Continuous-Claude-v3/tree/main/.claude/skills/parallel-agent-contracts into .gemini/skills/parallel-agent-contracts/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "parallel-agent-contracts", 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 parcadei/Continuous-Claude-v3 parallel-agent-contractsInstalls 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 parcadei/Continuous-Claude-v3 --skill parallel-agent-contracts -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/parcadei/Continuous-Claude-v3.git skills-src && mkdir -p .github/skills && cp -r skills-src/.claude/skills/parallel-agent-contracts .github/skills/parallel-agent-contracts && 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 "parallel-agent-contracts" agent skill from https://github.com/parcadei/Continuous-Claude-v3/tree/main/.claude/skills/parallel-agent-contracts into .github/skills/parallel-agent-contracts/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "parallel-agent-contracts", 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 parcadei/Continuous-Claude-v3 --skill parallel-agent-contracts -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install parcadei/Continuous-Claude-v3 parallel-agent-contracts --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/parcadei/Continuous-Claude-v3.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.claude/skills/parallel-agent-contracts .opencode/skills/parallel-agent-contracts && 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 "parallel-agent-contracts" agent skill from https://github.com/parcadei/Continuous-Claude-v3/tree/main/.claude/skills/parallel-agent-contracts into .opencode/skills/parallel-agent-contracts/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "parallel-agent-contracts", 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
parallel-agent-contracts- GitHub stars
- 3.9k
- Used in
- 1 other repo
- Token cost
- ~513 tokens
- SKILL.md length
- 119 words
- Files
- 1
- Skills in repo
- 141
- Repo updated
- First seen
- Licence
- MIT
At a glance
- Works in 3 steps: Verification Command (MANDATORY) → Grep-Before-Create → Canonical Type Map
- SKILL.md covers Required in Every Agent Prompt, Prompt Template and Why This Works
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
About this skill
Parallel Agent Contracts is a skill in parcadei/Continuous-Claude-v3 (3.9k stars). Its SKILL.md is about 513 tokens, and copies of it appear in 1 other owners' repositories. Licence: MIT.
Workflow steps
3 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 d07ff4b. 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 (its code samples are markdown).
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
Parallel Agent Contracts loads about 513 tokens when it runs. Until then it costs about 14 tokens; SKILL.md has 119 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 parcadei/Continuous-Claude-v3 at commit d07ff4b, republished under its MIT licence (© parcadei). 119 words, ~513 tokens.
Download SKILL.mdSave it as
.claude/skills/parallel-agent-contracts/SKILL.md (or your agent's skills folder).- name
- parallel-agent-contracts
- description
- Parallel Agent Type Contracts
- user-invocable
- false
Parallel Agent Type Contracts
When launching parallel agents for code implementation, prevent type duplication.
Required in Every Agent Prompt
1. Verification Command (MANDATORY)
## Before Marking Complete
Run verification:
\`\`\`bash
npx tsc --noEmit 2>&1 | head -20
\`\`\`
If ANY type errors exist, fix them before completing.2. Grep-Before-Create
## Before Creating Any Type/Interface
First check if it exists:
\`\`\`bash
grep -r "interface YourTypeName\|type YourTypeName" src/
\`\`\`
If found, import it. NEVER duplicate existing types.3. Canonical Type Map
Include relevant entries from this map in agent prompts:
| Type | Owner File | Import From |
|---|---|---|
NormalizedTool | src/sdk/agent.ts | './agent' |
ToolCall | src/sdk/agent.ts | './agent' |
ToolResult | src/sdk/agent.ts | './agent' |
ToolDefinition | src/sdk/agent.ts | './agent' |
Message | src/sdk/types.ts | './types' |
ContentBlock | src/sdk/types.ts | './types' |
TokenUsage | src/sdk/types.ts | './types' |
ProviderAdapter | src/sdk/providers/index.ts | './providers' |
RiggClient | src/sdk/client.ts | './client' |
Prompt Template
When spawning implementation agents:
# Task: [Description]
## Type Ownership (DO NOT recreate)
- [List relevant types from canonical map]
## Before Creating New Types
Run: `grep -r "interface TypeName" src/` - if exists, import it.
## Before Marking Complete
Run: `npx tsc --noEmit 2>&1 | head -20`
Fix all type errors before completing.
## Your Implementation
[Actual task description]Why This Works
- Type checker is the contract - tsc catches conflicts automatically
- Grep is fast - 1 second to check if type exists
- Explicit ownership - No ambiguity about where types live
- Fail fast - Agent can't claim "done" with broken types
© parcadei, MIT. 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/parallel-agent-contracts of parcadei/Continuous-Claude-v3.
Open the folder on GitHubat commit d07ff4b
Used in 1 other repository
We found 1 copy of this SKILL.md (exact, near-identical or edited) in other folders, from 1 other GitHub owner. This page covers the copy in parcadei/Continuous-Claude-v3, which our catalogue first saw on October 7, 2026.
Compare with similar skills
Parallel Agent Contracts 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 |
|---|---|---|---|---|---|---|
| Parallel Agent Contracts this skillparcadei/Continuous-Claude-v3 | 3.9k | 1 repos | ~513 | Automated safety check: Pass | MIT | |
| Claude Code Agent Developmentanthropics/claude-plugins-official | 38k | 8 repos | ~2.8k | Automated safety check: Pass | Apache-2.0 | |
| Subagent Driven DevelopmentAsvarox/allkaraoke | 261 | 38 repos | ~1.2k | Automated safety check: Pass | None | |
| Dispatching Parallel Agentsultralisp/ultralisp | 258 | 41 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.
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Questions about Parallel Agent Contracts
How do I install Parallel Agent Contracts in Claude Code?
Run `npx skills add parcadei/Continuous-Claude-v3 --skill parallel-agent-contracts -a claude-code`. Or copy the skill folder (.claude/skills/parallel-agent-contracts in parcadei/Continuous-Claude-v3) into .claude/skills/parallel-agent-contracts in your project. Claude Code loads it when a task matches its description.
How do I install Parallel Agent Contracts in Codex?
Run `npx skills add parcadei/Continuous-Claude-v3 --skill parallel-agent-contracts -a codex`. Or copy the skill folder (.claude/skills/parallel-agent-contracts in parcadei/Continuous-Claude-v3) into .agents/skills/parallel-agent-contracts in your project. Codex loads it when a task matches its description.
Can I use Parallel Agent Contracts 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 parcadei/Continuous-Claude-v3 --skill parallel-agent-contracts -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/parallel-agent-contracts, .gemini/skills/parallel-agent-contracts, .github/skills/parallel-agent-contracts and .opencode/skills/parallel-agent-contracts in your project.
What does Parallel Agent Contracts need to run?
SKILL.md names no scripts, command-line tools or credentials: Parallel Agent Contracts is instructions for the agent only.
Does Parallel Agent Contracts 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 Parallel Agent Contracts 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 Parallel Agent Contracts use?
Parallel Agent Contracts 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 Parallel Agent Contracts use?
About 513 tokens (SKILL.md is roughly 2.1k 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 Parallel Agent Contracts?
Skills that share tags, products or a category with Parallel Agent Contracts: Claude Code Agent Development (anthropics/claude-plugins-official, 38k 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 Parallel Agent Contracts?
parcadei (a GitHub user) maintains it in parcadei/Continuous-Claude-v3, which has 3,940 GitHub stars. The repository holds 141 skills in this directory. The repository was last updated on January 26, 2026.
Source: parcadei/Continuous-Claude-v3 on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.