Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add seaworld008/Commonly-used-high-value-skills --skill migration-architectgit clone --depth 1 https://github.com/seaworld008/Commonly-used-high-value-skillsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/seaworld008/commonly-used-high-value-skills/migration-architect)<a href="https://agentmods.dev/skills/seaworld008/commonly-used-high-value-skills/migration-architect"><img src="https://agentmods.dev/badge/skills/seaworld008/commonly-used-high-value-skills/migration-architect/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/seaworld008/commonly-used-high-value-skills/migration-architect"><img src="https://agentmods.dev/badge/skills/seaworld008/commonly-used-high-value-skills/migration-architect.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00021 | $0.03529 |
| Opus 5 | $0.00010 | $0.01765 |
| Sonnet 5 | $0.00004 | $0.00706 |
| Haiku 4.5 | $0.00002 | $0.00353 |
Grade A, and why
migration-architect scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 5d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 489 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Migration Architect
Tier: POWERFUL
Category: Engineering - Migration Strategy
Purpose: Zero-downtime migration planning, compatibility validation, and rollback strategy generation
Overview
The Migration Architect skill provides comprehensive tools and methodologies for planning, executing, and validating complex system migrations with minimal business impact. This skill combines proven migration patterns with automated planning tools to ensure successful transitions between systems, databases, and infrastructure.
Core Capabilities
1. Migration Strategy Planning
- Phased Migration Planning: Break complex migrations into manageable phases with clear validation gates
- Risk Assessment: Identify potential failure points and mitigation strategies before execution
- Timeline Estimation: Generate realistic timelines based on migration complexity and resource constraints
- Stakeholder Communication: Create communication templates and progress dashboards
2. Compatibility Analysis
- Schema Evolution: Analyze database schema changes for backward compatibility issues
- API Versioning: Detect breaking changes in REST/GraphQL APIs and microservice interfaces
- Data Type Validation: Identify data format mismatches and conversion requirements
- Constraint Analysis: Validate referential integrity and business rule changes
3. Rollback Strategy Generation
- Automated Rollback Plans: Generate comprehensive rollback procedures for each migration phase
- Data Recovery Scripts: Create point-in-time data restoration procedures
- Service Rollback: Plan service version rollbacks with traffic management
- Validation Checkpoints: Define success criteria and rollback triggers
Migration Patterns
Database Migrations
Schema Evolution Patterns
- Expand-Contract Pattern
- Expand: Add new columns/tables alongside existing schema
- Dual Write: Application writes to both old and new schema
- Migration: Backfill historical data to new schema
- Contract: Remove old columns/tables after validation
What ships with it
19 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
- assets/database_schema_after.json 9.1 KB
- assets/database_schema_before.json 5.6 KB
- assets/sample_database_migration.json 2.4 KB
- assets/sample_service_migration.json 4.8 KB
- expected_outputs/rollback_runbook.json 23 KB
- expected_outputs/rollback_runbook.txt 11 KB
- expected_outputs/sample_database_migration_plan.json 9.2 KB
- expected_outputs/sample_database_migration_plan.txt 4.6 KB
- expected_outputs/sample_service_migration_plan.json 8.9 KB
- expected_outputs/sample_service_migration_plan.txt 4.3 KB
- expected_outputs/schema_compatibility_report.json 10 KB
- expected_outputs/schema_compatibility_report.txt 4.6 KB
- README.md 12 KB
- references/data_reconciliation_strategies.md 46 KB
- references/migration_patterns_catalog.md 19 KB
- references/zero_downtime_techniques.md 31 KB
- scripts/compatibility_checker.py 42 KB runs code
- scripts/migration_planner.py 26 KB runs code
- scripts/rollback_generator.py 52 KB runs code
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 5d ago Changed 010e501b68fb
- 9d ago First seen · 489 lines · 21 tokens per session scan A 48280c2fd460
migration-architect is a skill published in the GitHub repository seaworld008/Commonly-used-high-value-skills (70 stars, last pushed 5d ago), licensed MIT. It adds 21 tokens to every session and 3,529 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
Other skills, from other repositories
elasticsearch
Query and analyze logs in Elasticsearch. Use this skill when the user wants to search logs, query log data, count log entries, filter by trace IDs, or analyze application logs stored in Elasticsearch. Common use cases include debugging requests by trace ID, finding error logs, analyzing request patterns, and…
svg-creator
Produce SVGs that are spec-correct (W3C SVG 2), CSS-independent, accessible when meaningful, safe to render in untrusted contexts, optimized in size, and readable enough to edit.
prompt-template-wizard
Rigorously collects and validates all fields needed to produce a complete, unambiguous prompt template for features and bug fixes. The skill asks targeted questions until the template is fully filled, consistent, and ready to paste into a Codex/GPT-5.2 coding session.
read-only-gh-pr-review
Review backend pull requests for correctness, security, performance, maintainability, and test coverage using GitHub CLI plus local repository inspection. Use when asked to review service-layer/API/database changes, audit backend branch diffs, summarize backend risk, or produce actionable must-fix/should-fix feedback.
german-elster-tax-filing
Use this skill to run a complete intake for a german personal income tax return in elster for tax years 2024 onward, estimate the tax result, and map the final values into the correct official forms and fields.
trello
Manage Trello boards, lists, and cards via the Trello REST API.