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 agentmods add skills/kevinzai/commander/migration-packnpx skills add KevinZai/commander --skill migration-packgit clone --depth 1 https://github.com/KevinZai/commanderWrote 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/kevinzai/commander/migration-pack)<a href="https://agentmods.dev/skills/kevinzai/commander/migration-pack"><img src="https://agentmods.dev/badge/skills/kevinzai/commander/migration-pack.svg" alt="Measured on agentmods" 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 | $0.00024 | $0.00520 |
| Opus 5 | $0.00012 | $0.00260 |
| Sonnet 5 | $0.00005 | $0.00104 |
| Haiku 4.5 | $0.00002 | $0.00052 |
Grade A, and why
ccc-pro-migration 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 yesterday.
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 — 48 lines — stays where its author put it; the contents beside it link to each section on GitHub.
What this pack will do
- Generate expand-contract migration plan for any schema change (add → backfill → switch → drop)
- Scaffold zero-downtime column rename: dual-write phase → backfill → cutover → cleanup
- Generate zero-downtime index creation scripts (CREATE INDEX CONCURRENTLY patterns)
- Scaffold large-table backfill runner: chunked updates with rate limiting and progress tracking
- Generate migration safety checklist: lock acquisition risk, rollback path, estimated duration
- Scaffold blue-green schema deploy with feature-flag gate
- Add migration CI gate: blocks deploy if migration is unsafe (table locks, missing rollback)
- Generate rollback scripts alongside every forward migration (auto-paired)
- Scaffold data type coercion migrations: int→bigint, varchar→text, nullable→not null
- Add foreign key deferral strategy for large cross-table migrations
- Generate Drizzle ORM migration wiring (schema push + migration file management)
- Generate Prisma migration wiring with shadow database support
- Scaffold multi-database migration sequencing: primary + replicas + read-replica lag checks
- Add post-migration verification queries: row counts, null checks, index health
Why Pro-only
Zero-downtime migrations are one of the highest-risk operations in production databases. The wrong index creation or column rename can lock a production table for minutes. The patterns here represent hard-won production experience with PostgreSQL, MySQL, and SQLite at scale — not documentation copy-paste.
Coming in v4.2
This skill is scaffolded. Full implementation ships in v4.2. Sign up at commanderplugin.com/pro to get notified and receive early access.
Tier check
This skill checks isPro() from commander/cowork-plugin/lib/license.js before running. If your license tier is starter, it surfaces an upgrade prompt and exits cleanly — no partial scaffolding, no silent failure.
Reference
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.
- yesterday First seen · 48 lines · 24 tokens per session scan A 194a13f8e7fc
ccc-pro-migration is a skill published in the GitHub repository KevinZai/commander (6 stars, last pushed yesterday), licensed MIT. It adds 24 tokens to every session and 520 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.
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