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/seed-hypermedia/seed/write-project-documentnpx skills add seed-hypermedia/seed --skill write-project-documentgit clone --depth 1 https://github.com/seed-hypermedia/seedWhat 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 | $0.00061 | $0.00443 |
| Opus 5 | $0.00030 | $0.00221 |
| Sonnet 5 | $0.00012 | $0.00089 |
| Haiku 4.5 | $0.00006 | $0.00044 |
Grade A, and why
write-project-document 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 yesterday.
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
Write Project Document
Create comprehensive project document in Markdown with the sections Problem, Solution, Scope, Rabbit Holes, and No Gos based on the current context, draft, solution and scope in this specific session. write the document in the ./docs/projects/ folder (create the folder if not present).
Output format
Always produce these sections in this order:
# <Project title>
## Problem
## Solution
## Scope
## Rabbit Holes
## No Gos
Use bullets when the content is easier to scan. Use paragraphs only where narrative explanation is clearer.
Section guidance
- Problem: State the user pain, product gap, or operational issue. Explain why it matters now. Avoid solution details unless needed for context.
- Solution: Describe the proposed approach in concrete terms. Include the user-facing behavior and the system changes only at the level needed for planning. Define what will be included. Prefer crisp bullets that can later become implementation tasks or acceptance criteria. if you can also add user stories to it the better.
- Scope: the timeframe it will require to implement the solution. if the plan is multi-phase or multi-step, you can define the timeframe for each one and also dependencies of each phase/section
- Rabbit Holes: List tempting investigations, extensions, or refactors that could consume time but are not required for the first useful version.
- No Gos: List explicit non-goals, constraints, and things the project should not do.
Working style
If inputs are sparse, draft a useful first version with clearly labeled assumptions instead of blocking. Ask clarifying questions only when a missing decision would materially change the project direction.
Keep the document practical and opinionated. Favor specific statements over generic product-planning language.
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.
- yesterday First seen · 46 lines · 61 tokens per session scan A b2b24e00b61e
write-project-document is a skill published in the GitHub repository seed-hypermedia/seed (56 stars, last pushed yesterday), licensed Apache-2.0. It adds 61 tokens to every session and 443 once invoked, about $0.0003 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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