V5 Migration
OpenLitterMap/openlittermap-web
The olm:v5 migration script, UpdateTagsService, batch processing, migratedat, ClassifyTagsService deprecated mappings, and data migration from v4 category tables.
Full migration pipeline where an agent team collaborates to perform source analysis, schema mapping, transformation script generation, validation query design, and rollback planning.
Install Data Migration
$ npx skills add revfactory/harness-100 --skill data-migration -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install revfactory/harness-100 data-migration --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/revfactory/harness-100.git skills-src && mkdir -p .claude/skills && cp -r skills-src/en/34-data-migration/.claude/skills/data-migration .claude/skills/data-migration && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "data-migration" agent skill from https://github.com/revfactory/harness-100/tree/main/en/34-data-migration/.claude/skills/data-migration into .claude/skills/data-migration/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "data-migration", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/revfactory/harness-100/tree/main/en/34-data-migration/.claude/skills/data-migrationType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add revfactory/harness-100 --skill data-migration -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install revfactory/harness-100 data-migration --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/revfactory/harness-100.git skills-src && mkdir -p .agents/skills && cp -r skills-src/en/34-data-migration/.claude/skills/data-migration .agents/skills/data-migration && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "data-migration" agent skill from https://github.com/revfactory/harness-100/tree/main/en/34-data-migration/.claude/skills/data-migration into .agents/skills/data-migration/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "data-migration", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add revfactory/harness-100 --skill data-migration -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install revfactory/harness-100 data-migration --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/revfactory/harness-100.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/en/34-data-migration/.claude/skills/data-migration .cursor/skills/data-migration && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "data-migration" agent skill from https://github.com/revfactory/harness-100/tree/main/en/34-data-migration/.claude/skills/data-migration into .cursor/skills/data-migration/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "data-migration", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/revfactory/harness-100.git --path en/34-data-migration/.claude/skills/data-migration--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add revfactory/harness-100 --skill data-migration -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install revfactory/harness-100 data-migration --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/revfactory/harness-100.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/en/34-data-migration/.claude/skills/data-migration .gemini/skills/data-migration && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "data-migration" agent skill from https://github.com/revfactory/harness-100/tree/main/en/34-data-migration/.claude/skills/data-migration into .gemini/skills/data-migration/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "data-migration", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install revfactory/harness-100 data-migrationInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add revfactory/harness-100 --skill data-migration -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/revfactory/harness-100.git skills-src && mkdir -p .github/skills && cp -r skills-src/en/34-data-migration/.claude/skills/data-migration .github/skills/data-migration && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "data-migration" agent skill from https://github.com/revfactory/harness-100/tree/main/en/34-data-migration/.claude/skills/data-migration into .github/skills/data-migration/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "data-migration", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add revfactory/harness-100 --skill data-migration -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install revfactory/harness-100 data-migration --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/revfactory/harness-100.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/en/34-data-migration/.claude/skills/data-migration .opencode/skills/data-migration && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "data-migration" agent skill from https://github.com/revfactory/harness-100/tree/main/en/34-data-migration/.claude/skills/data-migration into .opencode/skills/data-migration/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "data-migration", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
data-migration- GitHub stars
- 1.3k
- Token cost
- ~1.8k tokens
- SKILL.md length
- 666 words
- Files
- 1
- Skills in repo
- 464
- Repo updated
- First seen
- Licence
- Apache-2.0
At a glance
Full migration pipeline where an agent team collaborates to perform source analysis, schema mapping, transformation script generation, validation query design, and rollback planning.
- Works in 3 steps: Preparation (performed directly by the… → Team Assembly and Execution → Integration and Final Deliverables
- Requests like data migration
- SKILL.md covers Execution Mode, Agent Composition, Workflow and Execution Modes by Request Scope, plus 4 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Data Migration is an agent skill from revfactory/harness-100. Full migration pipeline where an agent team collaborates to perform source analysis, schema mapping, transformation script generation, validation query design, and rollback planning. Use this skill for requests like 'data migration', 'DB migration', 'data transfer', 'schema conversion', 'database migration plan', 'ETL scripts', 'data transition', 'DB migration validation', 'system cutover', etc. Note: real-time CDC streaming setup, cloud infrastructure provisioning, and application code migration are outside the…
Its SKILL.md is about 1.8k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Databases, covering Database migrations, Data pipelines and ETL and Code migrations. The licence is Apache-2.0.
When your agent uses it
- Requests like data migration
- Schema conversion
- Database migration plan
- Data transition
Example prompts
- “data migration”
- “DB migration”
- “data transfer”
- “/data-migration”
Requirements
- Python 3
Workflow steps
3 steps, taken from the step headings in SKILL.md.
What it can do on your machine
Read from SKILL.md and the folder at commit 8e8d35c. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md.
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Data Migration loads about 1.8k tokens when it runs. Until then it costs about 138 tokens; SKILL.md has 666 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
The full file from revfactory/harness-100 at commit 8e8d35c, republished under its Apache-2.0 licence (© revfactory). 666 words, ~1,778 tokens.
Download SKILL.mdSave it as
.claude/skills/data-migration/SKILL.md (or your agent's skills folder).- name
- data-migration
- description
- Full migration pipeline where an agent team collaborates to perform source analysis, schema mapping, transformation script generation, validation query design, and rollback planning. Use this skill for requests like 'data migration', 'DB migration', 'data transfer', 'schema conversion', 'database migration plan', 'ETL scripts', 'data transition', 'DB migration validation', 'system cutover', etc. Note: real-time CDC streaming setup, cloud infrastructure provisioning, and application code migration are outside the scope of this skill.
Data Migration — Full Migration Pipeline
An agent team collaborates to perform source analysis, schema mapping, transformation script generation, validation queries, and rollback planning.
Execution Mode
Agent Team — Five agents communicate directly via SendMessage and perform cross-validation.
Agent Composition
| Agent | File | Role | Type |
|---|---|---|---|
| source-analyst | .claude/agents/source-analyst.md | Source analysis, data profiling | general-purpose |
| schema-mapper | .claude/agents/schema-mapper.md | Schema mapping, transformation rule design | general-purpose |
| script-developer | .claude/agents/script-developer.md | ETL scripts, performance optimization | general-purpose |
| validation-engineer | .claude/agents/validation-engineer.md | Validation queries, integrity tests | general-purpose |
| rollback-planner | .claude/agents/rollback-planner.md | Rollback planning, emergency response | general-purpose |
Workflow
Phase 1: Preparation (performed directly by the orchestrator)
- Extract the following from user input:
- Source system: DBMS type, version, connection info, schema scope
- Target system: DBMS type, version, existing schema availability
- Migration scope: Full/partial, target tables, data time range
- Constraints: Allowable downtime, performance requirements, schedule
- Create the
_workspace/directory and subdirectories - Organize the input and save it to
_workspace/00_input.md - If pre-existing files are available, copy them to
_workspace/and skip the corresponding phase - Determine the execution mode based on the scope of the request
Phase 2: Team Assembly and Execution
| Order | Task | Owner | Dependencies | Deliverable |
|---|---|---|---|---|
| 1 | Source analysis | source-analyst | None | 01_source_analysis.md |
| 2 | Schema mapping | schema-mapper | Task 1 | 02_schema_mapping.md |
| 3a | Transformation scripts | script-developer | Task 2 | 03_migration_scripts/ |
| 3b | Validation suite | validation-engineer | Tasks 1, 2 | 04_validation_suite.md |
| 4 | Rollback plan | rollback-planner | Tasks 1, 2, 3a, 3b | 05_rollback_plan.md |
Tasks 3a (scripts) and 3b (validation) run in parallel.
Inter-agent communication flow:
- source-analyst completes > passes source schema to schema-mapper, volume/order to script-developer, integrity rules to validation-engineer
- schema-mapper completes > passes mapping spec to script-developer, transformation rules to validation-engineer, reverse mapping feasibility to rollback-planner
- script-developer completes > passes transaction boundaries to rollback-planner
- validation-engineer completes > passes rollback trigger conditions to rollback-planner
- rollback-planner develops the overall plan and feeds back risk items to each agent
Phase 3: Integration and Final Deliverables
- Verify all deliverables in
_workspace/ - Validate cross-deliverable consistency (mapping vs. scripts, validation vs. mapping, rollback vs. scripts)
- Present the final migration execution checklist to the user
Execution Modes by Request Scope
| User Request Pattern | Execution Mode | Agents Deployed |
|---|---|---|
| "Full migration plan" | Full pipeline | All 5 agents |
| "Analyze the source DB only" | Analysis mode | source-analyst only |
| "Just do schema mapping" | Mapping mode | source-analyst + schema-mapper |
| "Generate ETL scripts only" | Script mode | script-developer (assumes mapping exists) |
| "Create validation queries only" | Validation mode | validation-engineer (assumes mapping exists) |
| "Just create a rollback plan" | Rollback mode | rollback-planner (assumes full analysis exists) |
Reusing existing files: If the user provides existing DDL, ERD, or schema mapping documents, copy those files to the appropriate location in _workspace/ and skip the corresponding agent.
Show full SKILL.md (247 more words)Show less
Data Transfer Protocol
| Strategy | Method | Purpose |
|---|---|---|
| File-based | _workspace/ directory | Deliverable documents |
| Script-based | _workspace/03_migration_scripts/ | Executable code |
| Message-based | SendMessage | Key information transfer, feedback |
Error Handling
| Error Type | Strategy |
|---|---|
| DB connection unavailable | Fall back to DDL/ERD document-based analysis |
| Target schema undecided | Auto-generate recommended target schema based on source |
| Incompatible types | Propose two-stage conversion via intermediate type |
| Very large tables (>100M rows) | Partition-level migration strategy |
| Agent failure | Retry once; if still failing, proceed without that deliverable |
Test Scenarios
Normal Flow
Prompt: "Create a plan to migrate an e-commerce DB from MySQL 5.7 to PostgreSQL 16" Expected result:
- Source analysis: MySQL schema reverse-engineering, data profiling, dependency graph
- Schema mapping: MySQL to PostgreSQL type mapping, auto-increment to sequence conversion, character set handling
- Scripts: Python ETL code, batch processing, index management SQL
- Validation: Row count, checksum, FK integrity, transformation accuracy queries
- Rollback: Backup strategy, Go/No-Go criteria, step-by-step rollback procedures
Existing File Reuse Flow
Prompt: "Map this DDL file to a PostgreSQL target only" Expected result:
- source-analyst parses the DDL for schema analysis
- schema-mapper generates the PostgreSQL target mapping
- script-developer, validation-engineer, and rollback-planner are not deployed
Error Flow
Prompt: "Migrate from Oracle to MongoDB" (RDBMS to NoSQL) Expected result:
- source-analyst analyzes the relational structure
- schema-mapper proposes an RDBMS-to-document model conversion strategy (denormalization, embedding vs. references)
- Many irreversible transformations arise > rollback-planner develops an archive preservation strategy
Agent Extension Skills
| Skill | Path | Enhanced Agent | Role |
|---|---|---|---|
| type-mapping-encyclopedia | .claude/skills/type-mapping-encyclopedia/skill.md | schema-mapper | MySQL/Oracle/PostgreSQL type mapping, RDBMS-to-NoSQL, character set conversion |
| data-validation-patterns | .claude/skills/data-validation-patterns/skill.md | validation-engineer | 5-level validation (count > schema > value > referential > business), Go/No-Go checklist |
© revfactory, Apache-2.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
Just SKILL.md in en/34-data-migration/.claude/skills/data-migration of revfactory/harness-100.
Open the folder on GitHubat commit 8e8d35c
Compare with similar skills
Data Migration next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Data Migration this skillrevfactory/harness-100 | 1.3k | — | ~1.8k | Automated safety check: Pass | Apache-2.0 | |
| V5 MigrationOpenLitterMap/openlittermap-web | 134 | — | ~1.7k | Automated safety check: Pass | GPL-3.0 | |
| Code MigratorFerroxLabs/wayland | 608 | — | ~3.7k | Automated safety check: Pass | Apache-2.0 | |
| Glue 09 10 Migrationaws-samples/aws-glue-samples | 1.5k | — | ~2.4k | Automated safety check: Pass | MIT-0 | |
| Reversible MigrationJuliusBrussee/caveman | 110k | 1 repos | ~196 | Automated safety check: Pass | Apache-2.0 | |
| Managed Airflow Migrationsgoogle/skills | 21k | — | ~3k | Automated safety check: Pass | Apache-2.0 |
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Reversible Migration
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Categories
Questions about Data Migration
What does Data Migration do?
Full migration pipeline where an agent team collaborates to perform source analysis, schema mapping, transformation script generation, validation query design, and rollback planning. Data Migration is an agent skill from revfactory/harness-100. Full migration pipeline where an agent team collaborates to perform source analysis, schema mapping, transformation script generation, validation query design, and rollback planning.
When should I use Data Migration?
Data Migration fits situations like: requests like data migration; schema conversion; database migration plan; data transition.
How do I install Data Migration in Claude Code?
Run `npx skills add revfactory/harness-100 --skill data-migration -a claude-code`. Or copy the skill folder (en/34-data-migration/.claude/skills/data-migration in revfactory/harness-100) into .claude/skills/data-migration in your project. Claude Code loads it when a task matches its description.
How do I install Data Migration in Codex?
Run `npx skills add revfactory/harness-100 --skill data-migration -a codex`. Or copy the skill folder (en/34-data-migration/.claude/skills/data-migration in revfactory/harness-100) into .agents/skills/data-migration in your project. Codex loads it when a task matches its description.
Can I use Data Migration in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add revfactory/harness-100 --skill data-migration -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/data-migration, .gemini/skills/data-migration, .github/skills/data-migration and .opencode/skills/data-migration in your project.
What does Data Migration need to run?
SKILL.md names no scripts, command-line tools or credentials: Data Migration is instructions for the agent only. Our summary lists: Python 3.
Does Data Migration access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Data Migration safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Data Migration use?
Data Migration is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Data Migration use?
About 1.8k tokens (SKILL.md is roughly 7.1k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Data Migration?
Skills that share tags, products or a category with Data Migration: V5 Migration (OpenLitterMap/openlittermap-web, 134 stars), Code Migrator (FerroxLabs/wayland, 608 stars), Glue 09 10 Migration (aws-samples/aws-glue-samples, 1.5k stars) and Reversible Migration (JuliusBrussee/caveman, 110k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Data Migration?
revfactory (a GitHub user) maintains it in revfactory/harness-100, which has 1,290 GitHub stars. The repository holds 464 skills in this directory. The repository was last updated on March 22, 2026.
Source: revfactory/harness-100 on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.