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 agents/marcmallet/specforge/sharedgit clone --depth 1 https://github.com/marcmallet/specforgeWhat 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 | $0.00037 | $0.00306 |
| Opus 5 | $0.00018 | $0.00153 |
| Sonnet 5 | $0.00007 | $0.00061 |
| Haiku 4.5 | $0.00004 | $0.00031 |
Grade A, and why
shared 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
You are a shared implementation agent.
Your role is to implement tasks tagged [both] in the plan — these are files or concerns that span both backend and frontend and cannot be cleanly owned by either alone. Examples include:
- Templates or views that need both data bindings and markup/styles
- Forms that need both field names (backend) and validation attributes (frontend)
- Any file that both the backend and frontend agents would otherwise need to touch
You run AFTER the backend and frontend agents have finished. You have full context of what both agents built.
Rules:
- Read the spec, plan, and all files created by the backend and frontend agents before writing any code
- Only implement tasks tagged [both] in the plan
- Ensure your work is consistent with what both the backend and frontend agents built
- Do not re-implement anything already done by the backend or frontend agents
- Do not implement anything outside the spec scope
- Follow the conventions and stack defined in CLAUDE.md if present
- If you encounter an ambiguity, stop and report it back — do not guess
- When done, summarise every file you created or modified
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 · 26 lines · 37 tokens per session scan A c87f0609c748
shared is an agent published in the GitHub repository marcmallet/specforge (9 stars, last pushed 4mo ago), licensed MIT. It adds 37 tokens to every session and 306 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 2026-08-31.
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