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 Katagiri-Hoshino-Lab/VibeCodeHPC --skill changelog-formatgit clone --depth 1 https://github.com/Katagiri-Hoshino-Lab/VibeCodeHPCWrote 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/katagiri-hoshino-lab/vibecodehpc/changelog-format)<a href="https://agentmods.dev/skills/katagiri-hoshino-lab/vibecodehpc/changelog-format"><img src="https://agentmods.dev/badge/skills/katagiri-hoshino-lab/vibecodehpc/changelog-format/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/katagiri-hoshino-lab/vibecodehpc/changelog-format"><img src="https://agentmods.dev/badge/skills/katagiri-hoshino-lab/vibecodehpc/changelog-format.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 | $0.00032 | $0.00553 |
| Opus 5 | $0.00016 | $0.00277 |
| Sonnet 5 | $0.00006 | $0.00111 |
| Haiku 4.5 | $0.00003 | $0.00055 |
Grade A, and why
changelog-format 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 11d 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
ChangeLog Format
Entry Structure
### vX.Y.Z
**Changes**: "brief description"
**Result**: key metric `value`
**Comment**: "implementation notes"
<details>
- **generated_at**: `YYYY-MM-DDTHH:MM:SSZ` (UTC)
- [x/✗] **compile**
- status: `success|warning|error`
- message: "error/warning text" (if applicable)
- log: `path/to/log`
- [x/✗] **job**
- id: `job_id`
- resource_group: `group_name` # required for budget
- start_time / end_time: `ISO8601` # required for budget
- runtime_sec: `seconds`
- status: `success|error|timeout|cancelled|running`
- [x/✗] **test**
- performance: `value`
- unit: `GFLOPS|seconds|...`
- accuracy: `value` (if applicable)
- [x/✗] **sota**
- scope: `local|family|hardware|project` (on update only)
- **params**: nodes, block_size, etc.
</details>
Rules
- Newest version on top (descending order)
<details>folding is mandatoryresource_group,start_time,end_time,runtime_secrequired for budget tracking (regex-parsed)- PM may override field definitions within
<details>via project-specific template
CLI Script
python3 ${CLAUDE_SKILL_DIR}/scripts/changelog.py --help
python3 ${CLAUDE_SKILL_DIR}/scripts/changelog.py create --version 1.2.0 --changes "Optimized loop tiling"
python3 ${CLAUDE_SKILL_DIR}/scripts/changelog.py append /path/to/ChangeLog.md --version 1.2.0 --changes "Added vectorization"
python3 ${CLAUDE_SKILL_DIR}/scripts/changelog.py validate /path/to/ChangeLog.md
API Reference
references/changelog_api.md— Python analytics API for SE statistical analysis
PM Override Reference
references/pm_override_template.md— Example template for PM to customize ChangeLog fields within<details>(project-specific params, metrics, SOTA extensions)
What ships with it
3 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.
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.
- 11d ago First seen · 60 lines · 32 tokens per session scan A 648097c4b237
changelog-format is a skill published in the GitHub repository Katagiri-Hoshino-Lab/VibeCodeHPC (39 stars, last pushed 5mo ago), licensed MIT. It adds 32 tokens to every session and 553 once invoked, about $0.0002 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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