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 Morningstar202604/awesome-skillkit --skill migration-architectgit clone --depth 1 https://github.com/Morningstar202604/awesome-skillkitWrote 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/morningstar202604/awesome-skillkit/migration-architect)<a href="https://agentmods.dev/skills/morningstar202604/awesome-skillkit/migration-architect"><img src="https://agentmods.dev/badge/skills/morningstar202604/awesome-skillkit/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/morningstar202604/awesome-skillkit/migration-architect"><img src="https://agentmods.dev/badge/skills/morningstar202604/awesome-skillkit/migration-architect.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00098 | $0.02125 |
| Opus 5.5 | $0.00039 | $0.00850 |
| Sonnet 5.5 | $0.00020 | $0.00425 |
| Haiku 4.5 | $0.00010 | $0.00213 |
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 21d 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 — 150 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Migration Architect
Uses three tools to plan zero-downtime migrations, validate schema/API compatibility, and generate a rollback runbook — producing a phased plan, a compatibility report, and per-phase rollback steps.
Input Checklist
| Input | Required | Description |
|---|---|---|
| Migration spec JSON | Yes | A spec file describing the migration; if none exists, copy and adapt from assets/sample_database_migration.json |
| Migration type | Yes | database / service / infrastructure (sets the compatibility check --type) |
| Before/after schema/API files | Required for compatibility checks | --before old, --after new JSON; samples in assets/ |
| Output directory | No | Where the three artifacts are written; defaults to the current directory |
When inputs are missing, ask for all at once: "Please provide: (1) migration spec JSON path (if none, I'll draft one based on the assets sample and you confirm the migration content); (2) migration type (database/service/infrastructure); (3) the old/new schema file paths needed for the compatibility check."
Pre-flight Checks
Run line by line; on any failure → fix per the remediation and STOP:
# 1. Python 3 is available
python3 --version
# Expected: Python 3.8+.
# 2. All three tool scripts exist
ls scripts/migration_planner.py scripts/compatibility_checker.py scripts/rollback_generator.py
# Expected: all three filenames (run inside the skill directory). On failure: cd to the skill directory; still missing → STOP and report.
# 3. The migration spec is parseable: python3 -c "import json; json.load(open('<migration_spec.json>'))" → expected OK; on failure: confirm the spec file, or draft one from the assets sample, STOP.
# 4. The sample assets are in place
ls assets/sample_database_migration.json assets/database_schema_before.json assets/database_schema_after.json
# Expected: all three filenames. Missing → confirm repo integrity, then STOP.
Workflow
Run commands inside the skill directory (skills/programming/architecture/migration-architect/).
What ships with it
14 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.txt 4.6 KB
- expected_outputs/sample_service_migration_plan.json 8.9 KB
- expected_outputs/schema_compatibility_report.txt 4.6 KB
- README.md 12 KB
- references/data_reconciliation_strategies.md 46 KB
- scripts/compatibility_checker.py 42 KB runs code
- scripts/migration_planner.py 26 KB runs code
- scripts/rollback_generator.py 49 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.
- 21d ago Changed f1651c33aebf
- 23d ago Changed · -3 lines 7122301b2fbc
- 27d ago Changed · -281 lines · +40 tokens per session 5c32a0a711b8
- 1mo ago First seen · 434 lines · 58 tokens per session scan A ac791518648c
migration-architect is a skill published in the GitHub repository Morningstar202604/awesome-skillkit (0 stars, last pushed 16d ago), licensed Apache-2.0. It adds 98 tokens to every session and 2,125 once invoked, about $0.0004 per session on Opus 5.5. 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 2026-08-31.
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