langchain-upgrade-migration
Upgrade LangChain SDK versions safely with import path migration, LCEL conversion from legacy chains, and agent API updates. Trigger: "upgrade langchain", "langchain migration", "langchain breaking changes", "update langchain version", "langchain 0.3", "langchain deprecation".
71
88%
Does it follow best practices?
Impact
—
No eval scenarios have been run
Passed
No known issues
Quality
Discovery
100%Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.
This is a strong skill description that clearly defines its scope (LangChain SDK version upgrades), lists specific concrete actions (import path migration, LCEL conversion, agent API updates), and provides explicit trigger terms covering natural user language. It uses proper third-person voice and occupies a clear, distinct niche with minimal conflict risk.
| Dimension | Reasoning | Score |
|---|---|---|
Specificity | Lists multiple specific concrete actions: 'import path migration', 'LCEL conversion from legacy chains', and 'agent API updates'. These are clearly defined, actionable capabilities. | 3 / 3 |
Completeness | Clearly answers both 'what' (upgrade LangChain SDK versions with import path migration, LCEL conversion, agent API updates) and 'when' (explicit trigger terms listed with a 'Trigger:' clause covering multiple natural user phrases). | 3 / 3 |
Trigger Term Quality | Excellent coverage of natural trigger terms users would say: 'upgrade langchain', 'langchain migration', 'langchain breaking changes', 'update langchain version', 'langchain 0.3', 'langchain deprecation'. These are realistic phrases a developer would use. | 3 / 3 |
Distinctiveness Conflict Risk | Highly distinctive — targets a very specific niche (LangChain SDK version upgrades) with domain-specific terms like 'LCEL conversion', 'langchain 0.3', and 'agent API updates' that are unlikely to conflict with other skills. | 3 / 3 |
Total | 12 / 12 Passed |
Implementation
77%Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.
This is a strong, highly actionable migration guide with clear before/after code examples covering all major breaking changes across LangChain versions. The 7-step workflow with validation and a comprehensive checklist provides excellent structure. The main weakness is that the content is somewhat long for a single SKILL.md with no supporting bundle files, and showing both TypeScript and Python for every step adds length that could be managed through progressive disclosure.
Suggestions
Consider splitting language-specific migration details (TypeScript vs Python) into separate reference files to reduce the main SKILL.md length and improve progressive disclosure.
The error handling table and detailed memory/agent migration examples could be moved to a TROUBLESHOOTING.md or DETAILED_MIGRATIONS.md file, keeping only the most common pattern (LLMChain → LCEL) inline.
| Dimension | Reasoning | Score |
|---|---|---|
Conciseness | The content is mostly efficient with concrete code examples, but includes some redundancy by showing both TypeScript and Python for every step, and the overview/current state sections add minor padding. The breaking changes timeline is useful but could be more compact. | 2 / 3 |
Actionability | Fully executable code examples for both TypeScript and Python across all migration steps. Old-to-new patterns are copy-paste ready with clear before/after comparisons, specific package names, and concrete commands for version checking, upgrading, and testing. | 3 / 3 |
Workflow Clarity | Clear 7-step sequential workflow with explicit validation checkpoints (Step 7 runs tests with deprecation warnings as errors, Step 6 verifies version conflicts). The migration checklist provides a comprehensive verification loop, and the error handling table addresses common failure modes with fixes. | 3 / 3 |
Progressive Disclosure | The content is well-structured with clear sections and a logical flow, but it's a long monolithic file (~180 lines of substantive content) with no bundle files to offload detail. The agent migration, memory migration, and error handling sections could be split into separate reference files. External links to official docs are provided but no internal bundle references exist. | 2 / 3 |
Total | 10 / 12 Passed |
Validation
81%Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.
Validation — 9 / 11 Passed
Validation for skill structure
| Criteria | Description | Result |
|---|---|---|
allowed_tools_field | 'allowed-tools' contains unusual tool name(s) | Warning |
frontmatter_unknown_keys | Unknown frontmatter key(s) found; consider removing or moving to metadata | Warning |
Total | 9 / 11 Passed | |
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