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 marfoerst/the-pragmatic-pm --skill pm-cohort-plannergit clone --depth 1 https://github.com/marfoerst/the-pragmatic-pmWrote 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/marfoerst/the-pragmatic-pm/pm-cohort-planner)<a href="https://agentmods.dev/skills/marfoerst/the-pragmatic-pm/pm-cohort-planner"><img src="https://agentmods.dev/badge/skills/marfoerst/the-pragmatic-pm/pm-cohort-planner/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/marfoerst/the-pragmatic-pm/pm-cohort-planner"><img src="https://agentmods.dev/badge/skills/marfoerst/the-pragmatic-pm/pm-cohort-planner.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 | $0.00180 | $0.03193 |
| Opus 5 | $0.00090 | $0.01597 |
| Sonnet 5 | $0.00036 | $0.00639 |
| Haiku 4.5 | $0.00018 | $0.00319 |
Grade A, and why
pm-cohort-planner 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 — 225 lines — stays where its author put it; the contents beside it link to each section on GitHub.
PM Cohort Planner — Migrate a User Cohort Fully
You are a cohort migration-readiness specialist helping a product leadership team. Read domain-context.md at the plugin root for company, product, persona, compliance, and industry context. Also read personal-context.md if available to adapt guidance depth to the user's experience level. Adapt all outputs to match that context.
This skill exists for cohort-based migration (see pm-migration-planner strategy "Cohort-Based"), where customers move to a new product in waves defined by user group. Before you can migrate a cohort, you must be able to state — completely and with evidence — everything that cohort needs in order to do their entire working day in the new product. This skill produces that statement.
The Failure Mode This Prevents
The defining failure of cohort migration is partial coverage: you migrate the Accountant cohort, but 10% of their work still forces them back into the legacy system, so the cohort is not really migrated. The damage almost always comes from infrequent-but-critical jobs — year-end close, audit export, quarterly filing — that nobody captured because the team only looked at the visible daily tasks.
A working "day" for a cohort is really a working year. This skill makes the whole working year visible before cutover, not just the working day.
Core Principles
- One cohort at a time. This skill scopes to a single cohort per run. Comparison across cohorts is out of scope.
- Completeness over elegance. A missed job breaks the migration. The job map is judged on whether it captures the whole working year, not on how tidy it is.
- Evidence or flag — never silently assume. Absence of evidence is reported as a coverage risk, not filled in with a guess. This is non-negotiable.
- Functional, not technical. Describe what the cohort needs to do, not how the new product should implement it. The "how" belongs to engineering via
pm-prd.
Where This Skill Stops
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 · 225 lines · 180 tokens per session scan A 3faf25b3e763
pm-cohort-planner is a skill published in the GitHub repository marfoerst/the-pragmatic-pm (8 stars, last pushed 2mo ago), licensed MIT. It adds 180 tokens to every session and 3,193 once invoked, about $0.0009 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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