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/eveld/claude/upgrade-pluginnpx skills add eveld/claude --skill upgrade-plugingit clone --depth 1 https://github.com/eveld/claudeWrote 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/eveld/claude/upgrade-plugin)<a href="https://agentmods.dev/skills/eveld/claude/upgrade-plugin"><img src="https://agentmods.dev/badge/skills/eveld/claude/upgrade-plugin.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 | $0.00511 |
| Opus 5 | $0.00010 | $0.00255 |
| Sonnet 5 | $0.00004 | $0.00102 |
| Haiku 4.5 | $0.00002 | $0.00051 |
Grade A, and why
upgrade-plugin 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 3d 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.
What it actually says
Upgrade Plugin
Orchestrate project-level migrations by reading CHANGELOG.md as the single source of truth for migration steps.
When to Use
Called by /workflows:upgrade command to handle the upgrade process.
How It Works
1. Detect Current Version
Read thoughts/.version in the project directory:
current: v1.2.2
migrated_from: v1.2.1
migration_date: 2026-02-03
If file doesn't exist, detect from directory structure and create it.
2. Read CHANGELOG
Read CHANGELOG.md from the plugin directory to understand:
- What changed in the target version
- Migration steps required
- Version detection patterns
- What to ask the user
The CHANGELOG contains all version-specific migration logic.
3. Execute Migration
Follow the migration steps described in CHANGELOG:
- Ask user questions using AskUserQuestion (for groupings, edge cases, cleanup)
- Copy/move files as described
- Update cross-references
- Preserve originals until user confirms cleanup
4. Update Version File
After successful migration, update thoughts/.version:
current: v1.3.0
migrated_from: v1.2.2
migration_date: 2026-02-04
Key Principles
- CHANGELOG is source of truth - All version-specific logic lives there
- Project-level tracking - Each project has its own
thoughts/.version - Ask, don't assume - Use AskUserQuestion for all decisions
- Preserve data - Never delete without user confirmation
- Generate reports - Show what was done after migration
Example Workflow
1. User runs /workflows:upgrade
2. Skill reads thoughts/.version → "v1.2.2"
3. Skill reads CHANGELOG.md → finds v1.3.0 migration section
4. Skill follows migration steps from CHANGELOG
5. Skill asks user questions via AskUserQuestion
6. Skill executes migration
7. Skill updates thoughts/.version → "v1.3.0"
8. Skill generates report
This design means the skill never needs updating - only CHANGELOG changes per version.
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.
- 3d ago First seen · 76 lines · 19 tokens per session scan A 504de4372f83
upgrade-plugin is a skill published in the GitHub repository eveld/claude (10 stars, last pushed 7mo ago), licensed MIT. It adds 19 tokens to every session and 511 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 2026-08-31.
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