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/me2resh/apexyard/migrationnpx skills add me2resh/apexyard --skill migrationgit clone --depth 1 https://github.com/me2resh/apexyardWrote 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/me2resh/apexyard/migration)<a href="https://agentmods.dev/skills/me2resh/apexyard/migration"><img src="https://agentmods.dev/badge/skills/me2resh/apexyard/migration.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 | $0.00019 | $0.03841 |
| Opus 5 | $0.00010 | $0.01920 |
| Sonnet 5 | $0.00004 | $0.00768 |
| Haiku 4.5 | $0.00002 | $0.00384 |
Grade A, and why
migration scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 4d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 306 lines — stays where its author put it; the contents beside it link to each section on GitHub.
/migration — Create a Migration Ticket + AgDR
Migrations are high-blast-radius: data loss, downtime, lock contention, cross-service coordination. ApexYard treats them as a distinct class of change from code — a migration PR needs:
- A tracker issue with the
migrationlabel (plus priority) that captures the plan. - A migration AgDR at
docs/agdr/AgDR-NNNN-migration-<slug>.mdthat captures the options considered, rollback plan, downtime estimate, cross-service consumers, data volume, testing plan, and observability.
require-migration-ticket.sh (the matching PreToolUse hook) refuses to let you write to migration paths without both artefacts in place. This skill produces both in one pass.
Path resolution
Read the registry path via portfolio_registry, the per-project docs dir via portfolio_projects_dir, and the ideas backlog via portfolio_ideas_backlog — all from .claude/hooks/_lib-portfolio-paths.sh. Source the helper at the top of any bash block that touches those paths:
source "$(git rev-parse --show-toplevel)/.claude/hooks/_lib-read-config.sh"
source "$(git rev-parse --show-toplevel)/.claude/hooks/_lib-portfolio-paths.sh"
registry=$(portfolio_registry)
Defaults match today's single-fork layout (./apexyard.projects.yaml, ./projects, ./projects/ideas-backlog.md). Adopters in split-portfolio mode override the portfolio.{registry, projects_dir, ideas_backlog} keys in .claude/project-config.json. Don't hardcode literal apexyard.projects.yaml or projects/ paths in bash blocks — the helper resolves whichever mode the adopter is in. See docs/multi-project.md.
Usage
/migration # prompts for everything, creates ticket + AgDR in the current project
/migration curios-dog # explicitly target a registered project
When to invoke
- Before writing a new SQL migration file
- Before adding/modifying a DynamoDB table in
backend/template.yaml - Before adding/modifying an
aws_rds_*/aws_dynamodb_tableresource in Terraform - Before editing a Prisma schema in a way that will produce a migration
- Before editing TypeORM / Alembic migration directories
- Generally: BEFORE the first
Writeon anything the migration-gate hook blocks
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.
- 4d ago First seen · 306 lines · 19 tokens per session scan A bd240071ae8a
migration is a skill published in the GitHub repository me2resh/apexyard (498 stars, last pushed today), licensed MIT. It adds 19 tokens to every session and 3,841 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 2026-08-30.
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