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/mshadmanrahman/pm-pilot/writing-substacknpx skills add mshadmanrahman/pm-pilot --skill writing-substackgit clone --depth 1 https://github.com/mshadmanrahman/pm-pilotWrote 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/mshadmanrahman/pm-pilot/writing-substack)<a href="https://agentmods.dev/skills/mshadmanrahman/pm-pilot/writing-substack"><img src="https://agentmods.dev/badge/skills/mshadmanrahman/pm-pilot/writing-substack.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 | $0.00043 | $0.00457 |
| Opus 5 | $0.00022 | $0.00229 |
| Sonnet 5 | $0.00009 | $0.00091 |
| Haiku 4.5 | $0.00004 | $0.00046 |
Grade A, and why
writing-substack 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.
What it actually says
Writing Substack Notes
Create Substack Notes: short, punchy, engagement-optimized.
Trigger
"write a Substack Note", "Substack content", "Note ideas"
Format Constraints
- Total length: Under 500 characters (Substack Notes limit).
- Hook: First line grabs attention. Bold claim, surprising stat, or provocative question.
- Body: 2-5 short paragraphs. One idea per paragraph. Conversational tone.
- CTA: End with engagement driver (question, invitation, teaser).
- Hashtags: 2-4 relevant hashtags suggested separately.
Process
- Confirm topic and angle with user.
- Load voice profile if configured (see writing-style skill).
- Draft Note within 500 char limit.
- Suggest 2-4 hashtags.
- Offer 1-2 alternate hooks if user wants options.
Output Format
{Hook line}
{Body paragraph 1}
{Body paragraph 2}
{CTA}
---
Suggested hashtags: #tag1 #tag2 #tag3
Character count: {n}/500
Examples
Topic: Product management lessons
Most PRDs are fiction.
They describe a world where scope never creeps, timelines hold, and stakeholders agree on day one.
The best PMs I know write living docs. Updated weekly. Contradictions included.
What does your PRD process actually look like?
---
Suggested hashtags: #ProductManagement #PRD #BuildingProducts
Character count: 312/500
Rules
- Count characters accurately. Hard limit 500.
- Conversational, not corporate. Write like talking to a smart friend.
- One idea per Note. If there are multiple ideas, suggest a thread.
- No clickbait. The hook should deliver on its promise.
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 · 70 lines · 43 tokens per session scan A dc9323a06d4a
writing-substack is a skill published in the GitHub repository mshadmanrahman/pm-pilot (19 stars, last pushed 14d ago), licensed MIT. It adds 43 tokens to every session and 457 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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