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 isala404/forge --skill forge-idiomatic-developergit clone --depth 1 https://github.com/isala404/forgeWrote 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/isala404/forge/forge-idiomatic-developer)<a href="https://agentmods.dev/skills/isala404/forge/forge-idiomatic-developer"><img src="https://agentmods.dev/badge/skills/isala404/forge/forge-idiomatic-developer/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/isala404/forge/forge-idiomatic-developer"><img src="https://agentmods.dev/badge/skills/isala404/forge/forge-idiomatic-developer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00032 | $0.00712 |
| Opus 5.5 | $0.00013 | $0.00285 |
| Sonnet 5.5 | $0.00006 | $0.00142 |
| Haiku 4.5 | $0.00003 | $0.00071 |
Grade A, and why
forge-idiomatic-developer 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 1mo 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 — 54 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Building on Forge
Forge provides the backend primitives most applications need, with Postgres backends by default. Initialize one client from forge.toml and use Forge's actual API rather than inferring behavior from similar libraries.
Use the Forge version resolved by the project. Check its installed declarations when an exact signature or behavior matters; when editing Forge itself, use the repository source.
Read the relevant sections of the language reference:
- Node.js/TypeScript: references/node.md
- Python: references/python.md
- Rust: references/rust.md
- Go: references/go.md
Read these only when they apply:
- references/runtime-contract.md for configuration, errors, deployment, queues, scheduling, rate limits, pub/sub, presigning, flags, or maintenance.
- references/application-design.md for a nontrivial service, storage decision, authentication workflow, cross-system side effects, lifecycle, or test strategy. Do not preload unrelated language references.
Pick the primitive deliberately
| Need | Forge primitive | Core constraint |
|---|---|---|
| Direct-key values, TTL state, counters, CAS | kv |
Single-key operations; weakly consistent prefix scans |
| Durable background work and retry | queue |
Requires an owning consumer; at-least-once |
| Ephemeral live fan-out | pubsub |
At-most-once, live subscribers only |
| Files and presigned transfer URLs | blob |
Application must enforce its ownership policy |
| Passwords, sessions, API keys, one-time tokens | auth |
Application owns user and authorization records |
| Request throttling | ratelimit |
Fail mode is a security/availability choice; not a business counter |
| Cron or delayed enqueue | schedule |
Application must run scheduler ticks |
| Runtime settings and rollout flags | config |
Cached; secrets remain environment-backed |
What ships with it
7 files 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.
- 1mo ago First seen · 54 lines · 32 tokens per session scan A a49790a290f8
forge-idiomatic-developer is a skill published in the GitHub repository isala404/forge (85 stars, last pushed 1mo ago), licensed MIT. It adds 32 tokens to every session and 712 once invoked, about $0.0001 per session on Opus 5.5. 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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