Agent Handoff Contract
Stop fragile agent chains with structured, versioned, and idempotent handoff contracts for multi-agent systems.
- Prevent duplicate API calls or PRs during agent retries.
- Standardize data exchange between heterogeneous agents.
- Ensure downstream agents receive validated, high-quality inputs.
Free
Included in download
- Downloadable skill package
Sample input
Define a handoff contract between a 'Bug Analyzer' agent and a 'Fix Proposer' agent for a GitHub issue workflow.
Sample output
HANDOFF CONTRACT (Bug Analyzer -> Fix Proposer) version: 1 input: { issue_id: int, file_path: str, stack_trace: str, root_cause: str } output: { proposed_fix: str, test_case: str } idempotency_key: issue_id + "fix_generation" on_invalid: reject to 'Rework' queue; do not pass to Fix Proposer.
Agent Handoff Contract
Stop fragile agent chains with structured, versioned, and idempotent handoff contracts for multi-agent systems.
Free
Included in download
- Downloadable skill package
- Instant install
Sample input
Define a handoff contract between a 'Bug Analyzer' agent and a 'Fix Proposer' agent for a GitHub issue workflow.
Sample output
HANDOFF CONTRACT (Bug Analyzer -> Fix Proposer) version: 1 input: { issue_id: int, file_path: str, stack_trace: str, root_cause: str } output: { proposed_fix: str, test_case: str } idempotency_key: issue_id + "fix_generation" on_invalid: reject to 'Rework' queue; do not pass to Fix Proposer.
About This Skill
Eliminate Handoff Failures in Multi-Agent Pipelines
In multi-agent systems, the most frequent failure point is the handoff. When one agent passed a "blob of prose" to another, intent gets lost, retries cause duplicate actions, and downstream agents fail because of malformed inputs. This developer-centric skill provides a formal framework for establishing Handoff Contracts between agents.
What it does
It transforms fragile agent-to-agent communication into a structured, testable, and idempotent handshake. Instead of letting agents "figure it out," this skill forces a defined schema for inputs and outputs, explicit success criteria, and stable idempotency keys to ensure retries are safe.
Why use this skill
- Prevent Duplicates: Use idempotency keys to ensure side effects (like sending emails or charging cards) only happen once.
- Fail Fast: Implement 'on_invalid' logic to catch malformed data at the source before it poisons downstream tasks.
- Testable Pipelines: Create versioned schemas that allow you to unit test individual agents in your chain.
- Framework Agnostic: Compatible with LangChain, AutoGen, CrewAI, or custom Python/Node agents.
The Output
The skill produces a structured contract definition including versioning, specific data types for input/output, validation logic, and a recovery strategy for invalid transitions. This acts as the "API Specification" for your agent interactions.
Use Cases
- Prevent duplicate API calls or PRs during agent retries.
- Standardize data exchange between heterogeneous agents.
- Ensure downstream agents receive validated, high-quality inputs.
- Implement dead-letter queues for failed agent handoffs.
How to Install
mkdir -p ~/.claude/skills && curl -sL https://www.agensi.io/api/install/agent-handoff-contract -o /tmp/agent-handoff-contract.zip && unzip -o /tmp/agent-handoff-contract.zip -d ~/.claude/skills && rm /tmp/agent-handoff-contract.zipFree skills install directly. Paid skills require purchase - use the download button above after buying.
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