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 bitwize-music-studio/claude-ai-music-skills --skill promo-writergit clone --depth 1 https://github.com/bitwize-music-studio/claude-ai-music-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/bitwize-music-studio/claude-ai-music-skills/promo-writer)<a href="https://agentmods.dev/skills/bitwize-music-studio/claude-ai-music-skills/promo-writer"><img src="https://agentmods.dev/badge/skills/bitwize-music-studio/claude-ai-music-skills/promo-writer/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/bitwize-music-studio/claude-ai-music-skills/promo-writer"><img src="https://agentmods.dev/badge/skills/bitwize-music-studio/claude-ai-music-skills/promo-writer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 2 findings, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium Excessive Agency · line 98 Skill enables autonomous high-impact decisions without human-in-the-loop verification. Critical operations (destructive commands, financial transactions, data deletion) should require explicit user confirmation.Fix: Add human-in-the-loop confirmation for destructive, irreversible, or high-impact operations. Never auto-execute commands that modify files, send data, or alter system state.
- medium Excessive Agency · line 5 Skill selects an external model or provider that may use a different account or billing plan than the operator expects. Undisclosed model switches can cause unexpected cost or quota consumption.Fix: Remove the model/provider override or disclose it prominently and require explicit operator approval before invoking an external coding CLI or billed model.
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 | $0.00033 | $0.02921 |
| Opus 5 | $0.00016 | $0.01460 |
| Sonnet 5 | $0.00007 | $0.00584 |
| Haiku 4.5 | $0.00003 | $0.00292 |
Grade A, and why
promo-writer 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 — 333 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Promo Writer Skill
Generate social media copy for album promotion across Twitter/X, Instagram, TikTok, Facebook, and YouTube. Produces native-feeling content for each platform from album context — themes, track concepts, and streaming lyrics.
Purpose
Populate the promo/ directory with platform-specific copy ready for review. Each platform gets content shaped to its format, tone, and conventions — not the same text cross-posted everywhere.
When to Use
- After track concepts and lyrics are written (need material to pull from)
- Before release — generate copy to fill promo/ templates
- User says "write promo copy", "create social media posts", or "fill in the promo templates"
- When promo/ files exist but are still template placeholders
Position in Workflow
Lyrics Written → Promo Videos (optional) → **[Promo Writer]** → [Promo Review] → Release
Between content completion and promo-reviewer. The promo-reviewer polishes what this skill generates.
Supporting Files
- copy-formulas.md — Hook formulas, CTA templates, post structures, hashtag recipes
- /reference/promotion/social-media-best-practices.md — Platform strategy and content guidance
- /skills/promo-reviewer/platform-rules.md — Character limits and hashtag rules
Workflow
1. Album Resolution
Resolve the album from arguments:
Use MCP find_album with the album name from $ARGUMENTS. If no album specified, check get_session for last album context.
Verify readiness:
- Album must have track concepts written
- At least some tracks should have streaming lyrics (for quotable hooks)
- If no streaming lyrics exist, warn: "No streaming lyrics found — using track concepts only. Hooks will be less specific."
2. Data Gathering
Gather album context in batch to minimize round-trips:
- Album data:
get_album_full(album_slug, "concept,streaming,musical-direction")— album narrative + track content - Track list: from album data — all track names, concepts, statuses
- Streaming lyrics: from album data sections — pull quotable hooks from streaming lyrics (NOT Suno lyrics, which contain phonetic spellings)
- User preferences:
load_override("promotion-preferences.md")— tone, platform priorities, messaging themes, hashtag preferences, AI positioning
What ships with it
1 file 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.
- 12d ago First seen · 333 lines · 33 tokens per session scan A d58af9db1bdb
promo-writer is a skill published in the GitHub repository bitwize-music-studio/claude-ai-music-skills (483 stars, last pushed 2d ago), licensed CC0-1.0. It adds 33 tokens to every session and 2,921 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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