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legacy-migration-planner

Use when planning legacy system migrations, codebase modernization, monolith decomposition, microservices consolidation, cross-language rewrites, or framework upgrades. Invoke for strangler fig pattern, incremental migration strategy, or refactoring roadmaps. Do NOT use for domain analysis (use domain-analysis), component sizing (use component-identification-sizing), or step-by-step decomposition plans (use decomposition-planning-roadmap).

70

Quality

Does it follow best practices?

Impact

No eval scenarios have been run

SecuritybySnyk

Advisory

Suggest reviewing before use

SKILL.md
Quality
Evals
Security

Quality

Content

72%

Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.

The content is a well-structured, actionable overview with excellent progressive disclosure — a concise SKILL.md routing to six real reference files via a Load-When table. Its main weaknesses are redundancy between Core Principles and Constraints, and the absence of explicit intra-phase validation/feedback checkpoints in the workflow.

Suggestions

De-duplicate the 'Core Principles' and 'MUST DO / MUST NOT DO' sections so each directive appears once; cross-reference the principles from Constraints instead of restating them.

Add an explicit validation checkpoint at the end of the RESEARCH phase (e.g., a checklist confirming dependency-map, domain-candidates, stack-research, and risk-assessment files are complete and cited) before PLAN may begin.

Add a brief feedback-loop note for when a recommendation cannot be verified via web search/context7 (e.g., 'if unverifiable, mark as unverified assumption and ask the user') to give the workflow an explicit error-recovery path.

DimensionReasoningScore

Conciseness

The body is mostly lean and avoids explaining concepts Claude already knows, but the 'Core Principles' and 'Constraints (MUST DO / MUST NOT DO)' sections restate the same directives ('Research every technology', 'Cite file:line', 'Ask the user', 'Never guess acronyms') twice, so it could be tightened.

2 / 3

Actionability

For an instruction-only skill it gives concrete, executable guidance: specific output paths ('./migration-plan/research/', './migration-plan/domains/'), per-file naming, and an explicit required contents list per domain file ('current state with file:line refs, target state, migration steps, testing strategy, rollback plan, and success metrics').

3 / 3

Workflow Clarity

The two-phase RESEARCH → PLAN sequence with 8 numbered steps and the explicit gate 'Never start PLAN without completing RESEARCH' is clear, but there are no intra-phase validation checkpoints or error-recovery feedback loops, leaving validation implicit beyond the single phase gate.

2 / 3

Progressive Disclosure

The body is an overview that points to one-level-deep references via a well-signaled 'Reference Guide' table with a 'Load When' column, and all six referenced files (research-phase.md, assessment-framework.md, plan-phase.md, strangler-fig-patterns.md, frontend-backend-strategies.md, testing-safety-nets.md) exist in references/, matching the clear-overview anchor.

3 / 3

Total

10

/

12

Passed

Description

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.

The description is strong: it pairs an explicit 'Use when' trigger with a broad but concrete list of migration scenarios, and disambiguates itself from sibling skills via explicit 'Do NOT use for' routing. Voice is appropriately imperative/third-person, matching the good examples.

DimensionReasoningScore

Specificity

Lists many concrete scenarios — 'legacy system migrations, codebase modernization, monolith decomposition, microservices consolidation, cross-language rewrites, or framework upgrades' plus 'strangler fig pattern, incremental migration strategy, or refactoring roadmaps' — matching the multiple-specific-actions anchor.

3 / 3

Completeness

Explicit 'Use when planning...' trigger answers 'when', and 'planning legacy system migrations / ... roadmaps' answers 'what', satisfying both halves with explicit triggers rather than implication.

3 / 3

Trigger Term Quality

Uses natural terms a user would actually say ('legacy system migrations', 'codebase modernization', 'monolith decomposition', 'framework upgrades', 'refactoring roadmaps') with good coverage of common variations.

3 / 3

Distinctiveness Conflict Risk

The 'Do NOT use for domain analysis (use domain-analysis), component sizing (use component-identification-sizing), or step-by-step decomposition plans (use decomposition-planning-roadmap)' clause carves out a clear niche with named alternative skills, making wrong-skill triggering unlikely.

3 / 3

Total

12

/

12

Passed

Validation

100%

Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.

Validation16 / 16 Passed

Validation for skill structure

No warnings or errors.

Repository
tech-leads-club/agent-skills
Reviewed

Table of Contents

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