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 johnqtcg/awesome-skills --skill mysql-migrationgit clone --depth 1 https://github.com/johnqtcg/awesome-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/johnqtcg/awesome-skills/mysql-migration)<a href="https://agentmods.dev/skills/johnqtcg/awesome-skills/mysql-migration"><img src="https://agentmods.dev/badge/skills/johnqtcg/awesome-skills/mysql-migration/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/johnqtcg/awesome-skills/mysql-migration"><img src="https://agentmods.dev/badge/skills/johnqtcg/awesome-skills/mysql-migration.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 | $0.00132 | $0.06094 |
| Opus 5 | $0.00066 | $0.03047 |
| Sonnet 5 | $0.00026 | $0.01219 |
| Haiku 4.5 | $0.00013 | $0.00609 |
Grade A, and why
mysql-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 12d 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 — 421 lines — stays where its author put it; the contents beside it link to each section on GitHub.
MySQL Migration Safety Review
Quick Reference
| If you need to… | Go to |
|---|---|
| Understand what this skill covers | §1 Scope |
| Check mandatory prerequisites | §2 Mandatory Gates |
| Choose review depth | §3 Depth Selection |
| Handle incomplete context | §4 Degradation Modes |
| Analyze DDL safety item by item | §5 DDL Safety Checklist |
| Design a phased execution plan | §6 Execution Plan |
| Avoid common migration mistakes | §7 Anti-Examples |
| Score the review result | §8 Scorecard |
| Format review output | §9 Output Contract |
| Run the deterministic checker | §11 + scripts/lint_migration.py |
| Look up DDL algorithm by operation | references/ddl-algorithm-matrix.md |
| Plan a large-table (>10M rows) change | references/large-table-migration.md |
§1 Scope
Verified — 5.7, 8.0, 8.4 (transcribed from each manual, 2026-08-06). Assumed — 8.1–8.3, 9.x:
8.4's rules applied but never confirmed there; 9.x shares 8.4's online-DDL matrix byte for byte, yet
9.1.0 raised the INSTANT row-version ceiling 64→255 without touching it, so matrix identity is not
rule identity — re-check numeric thresholds against the target's manual. Unverified — 5.6 and
older, past 9.x: say so in §9.9 rather than answering as if covered. MM028 reports both;
--fail-on warning makes either a hard stop.
In scope — schema migration safety for InnoDB:
- ALTER TABLE (add/drop/modify column, add/drop index, rename, convert charset); CREATE / DROP INDEX
- Data backfill and transformation migrations
- Table restructuring (partitioning, splitting, merging), foreign key changes
- Migration files as SQL: raw
.sql/.ddl, Flyway, golang-migrate. Liquibase only via its SQL changelogs orliquibase updateSQLoutput — XML/YAML/JSON changelogs and programmatic (Go/Java/Python) migrations are not parsed; review the generated SQL and say that is what you did - Rollback planning, verification, and replication impact assessment
What ships with it
48 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.
- references/ddl-algorithm-matrix.md 17 KB
- references/large-table-migration.md 25 KB
- references/migration-anti-examples.md 15 KB
- scripts/lint_migration.py 51 KB runs code
- scripts/mutation_sweep.py 21 KB runs code
- scripts/run_model_eval.py 20 KB runs code
- scripts/run_regression.sh 3.8 KB runs code
- scripts/tests/COVERAGE.md 19 KB
- scripts/tests/eval_grader_fixtures/lintfail/MIG-005.with_skill.txt 561 B
- scripts/tests/eval_grader_fixtures/lintfail/MIG-005.without_skill.txt 561 B
- scripts/tests/eval_grader_fixtures/MIG-002.with_skill.txt 1.1 KB
- scripts/tests/eval_grader_fixtures/MIG-002.without_skill.txt 362 B
- scripts/tests/eval_grader_fixtures/MIG-006.with_skill.txt 1.1 KB
- scripts/tests/eval_grader_fixtures/MIG-006.without_skill.txt 362 B
- scripts/tests/eval_grader_fixtures/README.md 847 B
- scripts/tests/eval_grader_fixtures/regress/MIG-002.with_skill.txt 105 B
- scripts/tests/eval_grader_fixtures/regress/MIG-002.without_skill.txt 365 B
- scripts/tests/eval_grader_fixtures/regress/MIG-006.with_skill.txt 105 B
- scripts/tests/eval_grader_fixtures/regress/MIG-006.without_skill.txt 365 B
- scripts/tests/golden/001_missing_session_guards.json 1017 B
- scripts/tests/golden/002_implicit_algorithm.json 968 B
- scripts/tests/golden/003_not_null_without_phased.json 1.0 KB
- scripts/tests/golden/004_missing_rollback.json 954 B
- scripts/tests/golden/005_instant_on_57.json 970 B
- scripts/tests/golden/006_limit_offset_backfill.json 1.0 KB
- scripts/tests/golden/007_well_formed_phased.json 1.6 KB
- scripts/tests/golden/008_good_gh_ost.json 2.1 KB
- scripts/tests/golden/009_degraded_no_context.json 1.1 KB
- scripts/tests/golden/010_multi_step_workflow.json 1.2 KB
- scripts/tests/golden/011_varchar_boundary_cross.json 1.2 KB
- scripts/tests/golden/012_gh_ost_wrong_mode.json 1.7 KB
- scripts/tests/golden/013_partition_algorithm_57.json 1.2 KB
- scripts/tests/golden/014_drop_column_not_copy.json 1.8 KB
- scripts/tests/golden/015_fk_inplace_checks_on.json 1.5 KB
- scripts/tests/lint_baseline.txt 1.7 KB
- scripts/tests/test_ddl_matrix_drift.py 13 KB runs code
- scripts/tests/test_golden_scenarios.py 19 KB runs code
- scripts/tests/test_lint_migration.py 25 KB runs code
- scripts/tests/test_lint_round2_audit.py 18 KB runs code
- scripts/tests/test_lint_round3_audit.py 11 KB runs code
- scripts/tests/test_lint_round4_audit.py 18 KB runs code
- scripts/tests/test_model_eval_harness.py 27 KB runs code
- scripts/tests/test_skill_contract.py 13 KB runs code
- scripts/tests/test_tool_facts_drift.py 17 KB runs code
- scripts/tests/test_verify_server_guards.py 9.9 KB runs code
- scripts/verify_against_server.sh 11 KB runs code
- scripts/verify_matrix.sh 2.8 KB runs code
- scripts/verify-matrix.docker-compose.yml 2.4 KB
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.
- 12d ago First seen · 421 lines · 132 tokens per session scan A 9f671b2e3683
mysql-migration is a skill published in the GitHub repository johnqtcg/awesome-skills (30 stars, last pushed yesterday), licensed MIT. It adds 132 tokens to every session and 6,094 once invoked, about $0.0007 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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