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LangChain/LangGraph Agent Development Expert · dokhacgiakhoa | DecimalAI

agent toolingby dokhacgiakhoa

LangChain/LangGraph Agent Development Expert

dokhacgiakhoa/llm-application-dev-langchain-agent

Source dokhacgiakhoa/agent-skills-4-vibe-coding-cli ↗License NOASSERTION

You are an expert LangChain agent developer specializing in production-grade AI systems using LangChain 0.1+ and LangGraph.

SkillScore73Maintained

Automatic

AI Engineer pack

Last verified 8/29/2026

What it changes

Passed 16 of 22 test cases with the skill, and 12 of 22 without it.

Without skill55%

With skill73%

Checks it passed that the model alone missed

The response specifies setting the LANGCHAIN_API_KEY environment variable.
The response specifies setting LANGCHAIN_TRACING_V2=true in the environment.
The response instantiates EnsembleRetriever to combine keyword and vector retrievers.

and 2 more in the full report

4 fixed12 passed either way6 still failing0 broke

Pass-rate lift: +18 pp
Tokens: +17%
Agent turns: 0%
Response time: +3%

Model gemini-3.6-flashMeasured 8/29/2026v116 of 22 cases passed with skill

Tokens, turns and time describe resource use, not a dollar price.

Use this skill

Save it into your project's skills folder. Claude Code picks it up in its next session.

curl -fsSL --create-dirs -o .claude/skills/dokhacgiakhoa-llm-application-dev-langchain-agent/SKILL.md https://app.decimal.ai/s/dokhacgiakhoa-llm-application-dev-langchain-agent/SKILL.md

Want it pinned and updatable? pip install "decimalai>=0.15", then decimalai skills add dokhacgiakhoa-llm-application-dev-langchain-agent, and start Claude Code with claude --plugin-dir "$(git rev-parse --show-toplevel)/.agents"

1 · One-time — install the CLI (docs ↗)

pip install "decimalai>=0.15"

2 · Get the skill — writes .agents/skills/dokhacgiakhoa-llm-application-dev-langchain-agent/ and pins it in .decimal/skills.lock

decimalai skills add dokhacgiakhoa-llm-application-dev-langchain-agent

No CLI? Get the same file — curl · raw file

curl -fsSL --create-dirs -o .claude/skills/dokhacgiakhoa-llm-application-dev-langchain-agent/SKILL.md https://app.decimal.ai/s/dokhacgiakhoa-llm-application-dev-langchain-agent/SKILL.md

Raw file: /s/dokhacgiakhoa-llm-application-dev-langchain-agent/SKILL.md ↗ · machine-readable summary at /s/dokhacgiakhoa-llm-application-dev-langchain-agent.json ↗

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

See it in action

One of 4 test cases the skill fixed. Same model, same prompt, with and without the skill.

1 of 4

Prompt

How should an enterprise Python service be configured to automatically capture execution traces and tool latency metrics for orchestration graphs?

What was checked, without and with the skill
Checked	Without skill	With skill
The response specifies setting LANGCHAIN_TRACING_V2=true in the environment.	Missed	Passed
The response specifies setting the LANGCHAIN_API_KEY environment variable.	Missed	Passed

case-08 · gemini-3.6-flash · 8/29/2026 · answers are capped and redacted

What's inside

The instructions your model reads when the skill loads.

SKILL.md48 linessingle file

LangChain/LangGraph Agent Development Expert

You are an expert LangChain agent developer specializing in production-grade AI systems using LangChain 0.1+ and LangGraph.

Use this skill when

Working on langchain/langgraph agent development expert tasks or workflows
Needing guidance, best practices, or checklists for langchain/langgraph agent development expert

Do not use this skill when

The task is unrelated to langchain/langgraph agent development expert
You need a different domain or tool outside this scope

Instructions

Clarify goals, constraints, and required inputs.
Apply relevant best practices and validate outcomes.
Provide actionable steps and verification.
If detailed examples are required, open resources/implementation-playbook.md.

Context

Build sophisticated AI agent system for: $ARGUMENTS

Core Requirements

Use latest LangChain 0.1+ and LangGraph APIs
Implement async patterns throughout
Include comprehensive error handling and fallbacks
Integrate LangSmith for observability
Design for scalability and production deployment
Implement security best practices
Optimize for cost efficiency

Essential Architecture

🧠 Knowledge Modules (Fractal Skills)

1. LangGraph State Management

Track record

Benchmark

16 / 22

test cases passed, vs 12 / 22 without

Adoption

Users: 0
Times used: 0

Safety and source details

SkillSafety

✓ 3 of 3 passed

Code scan15 of 15 checks clean

0 critical · 0 warning · 0 info — scanner v4 — 8/10/2026

View 15 scanner checks

live_secretremote_code_executionreverse_shelldata_exfiltrationssrf_metadataagent_snoopinganti_refusaldestructive_commandsobfuscated_unicodeunicode_homoglyphopaque_blobsuspicious_urltool_overreachtrigger_abuseprompt_injection_phrasing

IntentSafe

LLM judge · does the skill do what it claims

ContentClean

LLM judge · policy & harmful-content review

Source

Imported

dokhacgiakhoa / agent-skills-4-vibe-coding-cli

.agent/skills/llm-application-dev-langchain-agent/SKILL.md

View on GitHub ↗

License NOASSERTIONImported 8/10/2026Version v1

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Published skills whose descriptions closely match this one, with their headline benchmark lift.

More skills from the same source and nearby in the registry, with their headline benchmark lift.

Ready to supercharge your AI agents?

See it in action

What's inside

LangChain/LangGraph Agent Development Expert

Use this skill when

Do not use this skill when

Instructions

Context

Core Requirements

Essential Architecture

🧠 Knowledge Modules (Fractal Skills)

1. LangGraph State Management

Track record

Benchmark

Adoption

SkillSafety

Source

Other skills for the same job

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