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 plainlang/plain-forge --skill add-resourcegit clone --depth 1 https://github.com/plainlang/plain-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/plainlang/plain-forge/add-resource)<a href="https://agentmods.dev/skills/plainlang/plain-forge/add-resource"><img src="https://agentmods.dev/badge/skills/plainlang/plain-forge/add-resource/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/plainlang/plain-forge/add-resource"><img src="https://agentmods.dev/badge/skills/plainlang/plain-forge/add-resource.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 | $0.00051 | $0.02204 |
| Opus 5.5 | $0.00020 | $0.00882 |
| Sonnet 5.5 | $0.00010 | $0.00441 |
| Haiku 4.5 | $0.00005 | $0.00220 |
Grade A, and why
add-resource 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 20d 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 — 109 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Add Resource
Always use the skill load-plain-reference to retrieve the ***plain syntax rules — but only if you haven't done so yet.
Linked resources are external files referenced from within a .plain spec using markdown link syntax. The file contents are passed to the renderer alongside the spec, providing additional context for code generation.
Workflow
- Identify or create the resource file. Keep it inside the project — the
resources/directory is the conventional home; it does not have to sit next to the.plainfile. - Add the markdown link at the appropriate place in the spec.
- Verify the file path is relative to the
.plainfile location. - Read the file back to confirm correct link syntax and path.
Format
Use standard markdown link syntax inside any spec section:
***definitions***
- :AuthData: is the authentication data structure.
- Its format is defined in the [auth schema](resources/auth_schema.json).
***implementation reqs***
- When transforming :BackupData:, use the JOLT transform.
- The transform is defined in [backup_transform.jolt](resources/backup_transform.jolt).
***functional specs***
- An API conforming to the [API specification](resources/api_spec.yaml) is exposed.
Path Rules
- Paths are resolved against the directory that contains the
.plainfile passed to the renderer, not the directory where the renderer is run. - This includes links inside imported and required modules — they resolve against that same directory, not against the directory the imported module itself lives in.
- A path that does not resolve there is then looked up in the
template-dirdirectory (if configured), and last in the renderer's built-in template library. - Relative paths may traverse into parent directories —
[resource](../../resources/resource.md)is valid — as long as they resolve to a real text file on disk. - No external URLs — only local file references.
- No folder paths — the target must be a file, not a directory.
- Only text-based files are supported.
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.
- 20d ago Changed e2e0acfe304f
- 22d ago Changed · +2 lines b4a5e28c064f
- 1mo ago First seen · 107 lines · 51 tokens per session scan A e1d09b16f528
add-resource is a skill published in the GitHub repository plainlang/plain-forge (79 stars, last pushed yesterday), licensed MIT. It adds 51 tokens to every session and 2,204 once invoked, about $0.0002 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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